lix-project/lix
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Merge remote-tracking branch 'upstream/master' into derivation-header-include-order

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This commit is contained in:
John Ericson 2020-08-01 19:38:35 +00:00
parent e3b394b6e8 a3f9625818
commit 9357512d73
170 changed files with 9689 additions and 2868 deletions
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15
.github/workflows/test.yml vendored
View file

@ -10,15 +10,8 @@ jobs:
runs-on: ${{ matrix.os }}
steps:
- uses: actions/checkout@v2
with:
fetch-depth: 0
- uses: cachix/install-nix-action@v10
- run: nix-build release.nix --arg nix '{ outPath = ./.; revCount = 123; shortRev = "abcdefgh"; }' --arg systems '[ builtins.currentSystem ]' -A installerScript -A perlBindings
macos_perf_test:
runs-on: macos-latest
steps:
- name: Disable syspolicy assessments
run: |
spctl --status
sudo spctl --master-disable
- uses: actions/checkout@v2
- uses: cachix/install-nix-action@v10
- run: nix-build release.nix --arg nix '{ outPath = ./.; revCount = 123; shortRev = "abcdefgh"; }' --arg systems '[ builtins.currentSystem ]' -A installerScript -A perlBindings
#- run: nix flake check
- run: nix-build -A checks.$(if [[ `uname` = Linux ]]; then echo x86_64-linux; else echo x86_64-darwin; fi)

2
.version
View file

@ -1 +1 @@
2.4
3.0

1
Makefile
View file

@ -11,6 +11,7 @@ makefiles = \
src/resolve-system-dependencies/local.mk \
scripts/local.mk \
corepkgs/local.mk \
misc/bash/local.mk \
misc/systemd/local.mk \
misc/launchd/local.mk \
misc/upstart/local.mk \

1
Makefile.config.in
View file

@ -19,6 +19,7 @@ LIBLZMA_LIBS = @LIBLZMA_LIBS@
OPENSSL_LIBS = @OPENSSL_LIBS@
PACKAGE_NAME = @PACKAGE_NAME@
PACKAGE_VERSION = @PACKAGE_VERSION@
SHELL = @bash@
SODIUM_LIBS = @SODIUM_LIBS@
SQLITE3_LIBS = @SQLITE3_LIBS@
bash = @bash@

25
README.md
View file

@ -12,7 +12,7 @@ for more details.
On Linux and macOS the easiest way to Install Nix is to run the following shell command
(as a user other than root):
```
```console
$ curl -L https://nixos.org/nix/install | sh
```
@ -20,27 +20,8 @@ Information on additional installation methods is available on the [Nix download
## Building And Developing
### Building Nix
You can build Nix using one of the targets provided by [release.nix](./release.nix):
```
$ nix-build ./release.nix -A build.aarch64-linux
$ nix-build ./release.nix -A build.x86_64-darwin
$ nix-build ./release.nix -A build.i686-linux
$ nix-build ./release.nix -A build.x86_64-linux
```
### Development Environment
You can use the provided `shell.nix` to get a working development environment:
```
$ nix-shell
$ ./bootstrap.sh
$ ./configure
$ make
```
See our [Hacking guide](https://hydra.nixos.org/job/nix/master/build.x86_64-linux/latest/download-by-type/doc/manual#chap-hacking) in our manual for instruction on how to
build nix from source with nix-build or how to get a development environment.
## Additional Resources

1
configure.ac
View file

@ -123,6 +123,7 @@ AC_PATH_PROG(flex, flex, false)
AC_PATH_PROG(bison, bison, false)
AC_PATH_PROG(dot, dot)
AC_PATH_PROG(lsof, lsof, lsof)
NEED_PROG(jq, jq)
AC_SUBST(coreutils, [$(dirname $(type -p cat))])

3
default.nix Normal file
View file

@ -0,0 +1,3 @@
(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
src = ./.;
}).defaultNix

28
doc/manual/command-ref/conf-file.xml
View file

@ -370,34 +370,6 @@ false</literal>.</para>
</varlistentry>
<varlistentry xml:id="conf-hashed-mirrors"><term><literal>hashed-mirrors</literal></term>
<listitem><para>A list of web servers used by
<function>builtins.fetchurl</function> to obtain files by
hash. The default is
<literal>http://tarballs.nixos.org/</literal>. Given a hash type
<replaceable>ht</replaceable> and a base-16 hash
<replaceable>h</replaceable>, Nix will try to download the file
from
<literal>hashed-mirror/<replaceable>ht</replaceable>/<replaceable>h</replaceable></literal>.
This allows files to be downloaded even if they have disappeared
from their original URI. For example, given the default mirror
<literal>http://tarballs.nixos.org/</literal>, when building the derivation
<programlisting>
builtins.fetchurl {
url = "https://example.org/foo-1.2.3.tar.xz";
sha256 = "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae";
}
</programlisting>
Nix will attempt to download this file from
<literal>http://tarballs.nixos.org/sha256/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae</literal>
first. If it is not available there, if will try the original URI.</para></listitem>
</varlistentry>
<varlistentry xml:id="conf-http-connections"><term><literal>http-connections</literal></term>
<listitem><para>The maximum number of parallel TCP connections

119
doc/manual/expressions/builder-syntax.xml
View file

@ -1,119 +0,0 @@
<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id='sec-builder-syntax'>
<title>Builder Syntax</title>
<example xml:id='ex-hello-builder'><title>Build script for GNU Hello
(<filename>builder.sh</filename>)</title>
<programlisting>
source $stdenv/setup <co xml:id='ex-hello-builder-co-1' />
PATH=$perl/bin:$PATH <co xml:id='ex-hello-builder-co-2' />
tar xvfz $src <co xml:id='ex-hello-builder-co-3' />
cd hello-*
./configure --prefix=$out <co xml:id='ex-hello-builder-co-4' />
make <co xml:id='ex-hello-builder-co-5' />
make install</programlisting>
</example>
<para><xref linkend='ex-hello-builder' /> shows the builder referenced
from Hello's Nix expression (stored in
<filename>pkgs/applications/misc/hello/ex-1/builder.sh</filename>).
The builder can actually be made a lot shorter by using the
<emphasis>generic builder</emphasis> functions provided by
<varname>stdenv</varname>, but here we write out the build steps to
elucidate what a builder does. It performs the following
steps:</para>
<calloutlist>
<callout arearefs='ex-hello-builder-co-1'>
<para>When Nix runs a builder, it initially completely clears the
environment (except for the attributes declared in the
derivation). For instance, the <envar>PATH</envar> variable is
empty<footnote><para>Actually, it's initialised to
<filename>/path-not-set</filename> to prevent Bash from setting it
to a default value.</para></footnote>. This is done to prevent
undeclared inputs from being used in the build process. If for
example the <envar>PATH</envar> contained
<filename>/usr/bin</filename>, then you might accidentally use
<filename>/usr/bin/gcc</filename>.</para>
<para>So the first step is to set up the environment. This is
done by calling the <filename>setup</filename> script of the
standard environment. The environment variable
<envar>stdenv</envar> points to the location of the standard
environment being used. (It wasn't specified explicitly as an
attribute in <xref linkend='ex-hello-nix' />, but
<varname>mkDerivation</varname> adds it automatically.)</para>
</callout>
<callout arearefs='ex-hello-builder-co-2'>
<para>Since Hello needs Perl, we have to make sure that Perl is in
the <envar>PATH</envar>. The <envar>perl</envar> environment
variable points to the location of the Perl package (since it
was passed in as an attribute to the derivation), so
<filename><replaceable>$perl</replaceable>/bin</filename> is the
directory containing the Perl interpreter.</para>
</callout>
<callout arearefs='ex-hello-builder-co-3'>
<para>Now we have to unpack the sources. The
<varname>src</varname> attribute was bound to the result of
fetching the Hello source tarball from the network, so the
<envar>src</envar> environment variable points to the location in
the Nix store to which the tarball was downloaded. After
unpacking, we <command>cd</command> to the resulting source
directory.</para>
<para>The whole build is performed in a temporary directory
created in <varname>/tmp</varname>, by the way. This directory is
removed after the builder finishes, so there is no need to clean
up the sources afterwards. Also, the temporary directory is
always newly created, so you don't have to worry about files from
previous builds interfering with the current build.</para>
</callout>
<callout arearefs='ex-hello-builder-co-4'>
<para>GNU Hello is a typical Autoconf-based package, so we first
have to run its <filename>configure</filename> script. In Nix
every package is stored in a separate location in the Nix store,
for instance
<filename>/nix/store/9a54ba97fb71b65fda531012d0443ce2-hello-2.1.1</filename>.
Nix computes this path by cryptographically hashing all attributes
of the derivation. The path is passed to the builder through the
<envar>out</envar> environment variable. So here we give
<filename>configure</filename> the parameter
<literal>--prefix=$out</literal> to cause Hello to be installed in
the expected location.</para>
</callout>
<callout arearefs='ex-hello-builder-co-5'>
<para>Finally we build Hello (<literal>make</literal>) and install
it into the location specified by <envar>out</envar>
(<literal>make install</literal>).</para>
</callout>
</calloutlist>
<para>If you are wondering about the absence of error checking on the
result of various commands called in the builder: this is because the
shell script is evaluated with Bash's <option>-e</option> option,
which causes the script to be aborted if any command fails without an
error check.</para>
</section>

43
doc/manual/hacking.xml
View file

@ -7,15 +7,34 @@
<para>This section provides some notes on how to hack on Nix. To get
the latest version of Nix from GitHub:
<screen>
$ git clone git://github.com/NixOS/nix.git
$ git clone https://github.com/NixOS/nix.git
$ cd nix
</screen>
</para>
<para>To build it and its dependencies:
<para>To build Nix for the current operating system/architecture use
<screen>
$ nix-build release.nix -A build.x86_64-linux
$ nix-build
</screen>
or if you have a flakes-enabled nix:
<screen>
$ nix build
</screen>
This will build <literal>defaultPackage</literal> attribute defined in the <literal>flake.nix</literal> file.
To build for other platforms add one of the following suffixes to it: aarch64-linux,
i686-linux, x86_64-darwin, x86_64-linux.
i.e.
<screen>
nix-build -A defaultPackage.x86_64-linux
</screen>
</para>
<para>To build all dependencies and start a shell in which all
@ -27,13 +46,27 @@ $ nix-shell
To build Nix itself in this shell:
<screen>
[nix-shell]$ ./bootstrap.sh
[nix-shell]$ configurePhase
[nix-shell]$ make
[nix-shell]$ ./configure $configureFlags
[nix-shell]$ make -j $NIX_BUILD_CORES
</screen>
To install it in <literal>$(pwd)/inst</literal> and test it:
<screen>
[nix-shell]$ make install
[nix-shell]$ make installcheck
[nix-shell]$ ./inst/bin/nix --version
nix (Nix) 2.4
</screen>
If you have a flakes-enabled nix you can replace:
<screen>
$ nix-shell
</screen>
by:
<screen>
$ nix develop
</screen>
</para>

26
flake.lock Normal file
View file

@ -0,0 +1,26 @@
{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1591633336,
"narHash": "sha256-oVXv4xAnDJB03LvZGbC72vSVlIbbJr8tpjEW5o/Fdek=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "70717a337f7ae4e486ba71a500367cad697e5f09",
"type": "github"
},
"original": {
"id": "nixpkgs",
"ref": "nixos-20.03-small",
"type": "indirect"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 6
}

443
flake.nix Normal file
View file

@ -0,0 +1,443 @@
{
description = "The purely functional package manager";
inputs.nixpkgs.url = "nixpkgs/nixos-20.03-small";
outputs = { self, nixpkgs }:
let
version = builtins.readFile ./.version + versionSuffix;
versionSuffix =
if officialRelease
then ""
else "pre${builtins.substring 0 8 (self.lastModifiedDate or self.lastModified)}_${self.shortRev or "dirty"}";
officialRelease = false;
systems = [ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ];
forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
# Memoize nixpkgs for different platforms for efficiency.
nixpkgsFor = forAllSystems (system:
import nixpkgs {
inherit system;
overlays = [ self.overlay ];
}
);
commonDeps = pkgs: with pkgs; rec {
# Use "busybox-sandbox-shell" if present,
# if not (legacy) fallback and hope it's sufficient.
sh = pkgs.busybox-sandbox-shell or (busybox.override {
useMusl = true;
enableStatic = true;
enableMinimal = true;
extraConfig = ''
CONFIG_FEATURE_FANCY_ECHO y
CONFIG_FEATURE_SH_MATH y
CONFIG_FEATURE_SH_MATH_64 y
CONFIG_ASH y
CONFIG_ASH_OPTIMIZE_FOR_SIZE y
CONFIG_ASH_ALIAS y
CONFIG_ASH_BASH_COMPAT y
CONFIG_ASH_CMDCMD y
CONFIG_ASH_ECHO y
CONFIG_ASH_GETOPTS y
CONFIG_ASH_INTERNAL_GLOB y
CONFIG_ASH_JOB_CONTROL y
CONFIG_ASH_PRINTF y
CONFIG_ASH_TEST y
'';
});
configureFlags =
lib.optionals stdenv.isLinux [
"--with-sandbox-shell=${sh}/bin/busybox"
];
buildDeps =
[ bison
flex
libxml2
libxslt
docbook5
docbook_xsl_ns
autoconf-archive
autoreconfHook
curl
bzip2 xz brotli zlib editline
openssl pkgconfig sqlite
libarchive
boost
(if lib.versionAtLeast lib.version "20.03pre"
then nlohmann_json
else nlohmann_json.override { multipleHeaders = true; })
nlohmann_json
# Tests
git
mercurial
jq
gmock
]
++ lib.optionals stdenv.isLinux [libseccomp utillinuxMinimal]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
++ lib.optional (stdenv.isLinux || stdenv.isDarwin)
(aws-sdk-cpp.override {
apis = ["s3" "transfer"];
customMemoryManagement = false;
});
propagatedDeps =
[ (boehmgc.override { enableLargeConfig = true; })
];
perlDeps =
[ perl
perlPackages.DBDSQLite
];
};
in {
# A Nixpkgs overlay that overrides the 'nix' and
# 'nix.perl-bindings' packages.
overlay = final: prev: {
nix = with final; with commonDeps pkgs; (stdenv.mkDerivation {
name = "nix-${version}";
src = self;
VERSION_SUFFIX = versionSuffix;
outputs = [ "out" "dev" "doc" ];
buildInputs = buildDeps;
propagatedBuildInputs = propagatedDeps;
preConfigure =
''
# Copy libboost_context so we don't get all of Boost in our closure.
# https://github.com/NixOS/nixpkgs/issues/45462
mkdir -p $out/lib
cp -pd ${boost}/lib/{libboost_context*,libboost_thread*,libboost_system*} $out/lib
rm -f $out/lib/*.a
${lib.optionalString stdenv.isLinux ''
chmod u+w $out/lib/*.so.*
patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib $out/lib/libboost_thread.so.*
''}
'';
configureFlags = configureFlags ++
[ "--sysconfdir=/etc" ];
enableParallelBuilding = true;
makeFlags = "profiledir=$(out)/etc/profile.d";
doCheck = true;
installFlags = "sysconfdir=$(out)/etc";
postInstall = ''
mkdir -p $doc/nix-support
echo "doc manual $doc/share/doc/nix/manual" >> $doc/nix-support/hydra-build-products
'';
doInstallCheck = true;
installCheckFlags = "sysconfdir=$(out)/etc";
separateDebugInfo = true;
}) // {
perl-bindings = with final; stdenv.mkDerivation {
name = "nix-perl-${version}";
src = self;
buildInputs =
[ autoconf-archive
autoreconfHook
nix
curl
bzip2
xz
pkgconfig
pkgs.perl
boost
]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium;
configureFlags = ''
--with-dbi=${perlPackages.DBI}/${pkgs.perl.libPrefix}
--with-dbd-sqlite=${perlPackages.DBDSQLite}/${pkgs.perl.libPrefix}
'';
enableParallelBuilding = true;
postUnpack = "sourceRoot=$sourceRoot/perl";
};
};
};
hydraJobs = {
# Binary package for various platforms.
build = nixpkgs.lib.genAttrs systems (system: nixpkgsFor.${system}.nix);
# Perl bindings for various platforms.
perlBindings = nixpkgs.lib.genAttrs systems (system: nixpkgsFor.${system}.nix.perl-bindings);
# Binary tarball for various platforms, containing a Nix store
# with the closure of 'nix' package, and the second half of
# the installation script.
binaryTarball = nixpkgs.lib.genAttrs systems (system:
with nixpkgsFor.${system};
let
installerClosureInfo = closureInfo { rootPaths = [ nix cacert ]; };
in
runCommand "nix-binary-tarball-${version}"
{ #nativeBuildInputs = lib.optional (system != "aarch64-linux") shellcheck;
meta.description = "Distribution-independent Nix bootstrap binaries for ${system}";
}
''
cp ${installerClosureInfo}/registration $TMPDIR/reginfo
substitute ${./scripts/install-nix-from-closure.sh} $TMPDIR/install \
--subst-var-by nix ${nix} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-darwin-multi-user.sh} $TMPDIR/install-darwin-multi-user.sh \
--subst-var-by nix ${nix} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-systemd-multi-user.sh} $TMPDIR/install-systemd-multi-user.sh \
--subst-var-by nix ${nix} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-multi-user.sh} $TMPDIR/install-multi-user \
--subst-var-by nix ${nix} \
--subst-var-by cacert ${cacert}
if type -p shellcheck; then
# SC1090: Don't worry about not being able to find
# $nix/etc/profile.d/nix.sh
shellcheck --exclude SC1090 $TMPDIR/install
shellcheck $TMPDIR/install-darwin-multi-user.sh
shellcheck $TMPDIR/install-systemd-multi-user.sh
# SC1091: Don't panic about not being able to source
# /etc/profile
# SC2002: Ignore "useless cat" "error", when loading
# .reginfo, as the cat is a much cleaner
# implementation, even though it is "useless"
# SC2116: Allow ROOT_HOME=$(echo ~root) for resolving
# root's home directory
shellcheck --external-sources \
--exclude SC1091,SC2002,SC2116 $TMPDIR/install-multi-user
fi
chmod +x $TMPDIR/install
chmod +x $TMPDIR/install-darwin-multi-user.sh
chmod +x $TMPDIR/install-systemd-multi-user.sh
chmod +x $TMPDIR/install-multi-user
dir=nix-${version}-${system}
fn=$out/$dir.tar.xz
mkdir -p $out/nix-support
echo "file binary-dist $fn" >> $out/nix-support/hydra-build-products
tar cvfJ $fn \
--owner=0 --group=0 --mode=u+rw,uga+r \
--absolute-names \
--hard-dereference \
--transform "s,$TMPDIR/install,$dir/install," \
--transform "s,$TMPDIR/reginfo,$dir/.reginfo," \
--transform "s,$NIX_STORE,$dir/store,S" \
$TMPDIR/install $TMPDIR/install-darwin-multi-user.sh \
$TMPDIR/install-systemd-multi-user.sh \
$TMPDIR/install-multi-user $TMPDIR/reginfo \
$(cat ${installerClosureInfo}/store-paths)
'');
# The first half of the installation script. This is uploaded
# to https://nixos.org/nix/install. It downloads the binary
# tarball for the user's system and calls the second half of the
# installation script.
installerScript =
with nixpkgsFor.x86_64-linux;
runCommand "installer-script"
{ buildInputs = [ nix ];
}
''
mkdir -p $out/nix-support
substitute ${./scripts/install.in} $out/install \
${pkgs.lib.concatMapStrings
(system: "--replace '@binaryTarball_${system}@' $(nix --experimental-features nix-command hash-file --base16 --type sha256 ${self.hydraJobs.binaryTarball.${system}}/*.tar.xz) ")
[ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ]
} \
--replace '@nixVersion@' ${version}
echo "file installer $out/install" >> $out/nix-support/hydra-build-products
'';
# Line coverage analysis.
coverage =
with nixpkgsFor.x86_64-linux;
with commonDeps pkgs;
releaseTools.coverageAnalysis {
name = "nix-coverage-${version}";
src = self;
enableParallelBuilding = true;
buildInputs = buildDeps ++ propagatedDeps;
dontInstall = false;
doInstallCheck = true;
lcovFilter = [ "*/boost/*" "*-tab.*" ];
# We call `dot', and even though we just use it to
# syntax-check generated dot files, it still requires some
# fonts. So provide those.
FONTCONFIG_FILE = texFunctions.fontsConf;
# To test building without precompiled headers.
makeFlagsArray = [ "PRECOMPILE_HEADERS=0" ];
};
# System tests.
tests.remoteBuilds = import ./tests/remote-builds.nix {
system = "x86_64-linux";
inherit nixpkgs;
inherit (self) overlay;
};
tests.nix-copy-closure = import ./tests/nix-copy-closure.nix {
system = "x86_64-linux";
inherit nixpkgs;
inherit (self) overlay;
};
tests.githubFlakes = (import ./tests/github-flakes.nix rec {
system = "x86_64-linux";
inherit nixpkgs;
inherit (self) overlay;
});
tests.setuid = nixpkgs.lib.genAttrs
["i686-linux" "x86_64-linux"]
(system:
import ./tests/setuid.nix rec {
inherit nixpkgs system;
inherit (self) overlay;
});
# Test whether the binary tarball works in an Ubuntu system.
tests.binaryTarball =
with nixpkgsFor.x86_64-linux;
vmTools.runInLinuxImage (runCommand "nix-binary-tarball-test"
{ diskImage = vmTools.diskImages.ubuntu1204x86_64;
}
''
set -x
useradd -m alice
su - alice -c 'tar xf ${self.hydraJobs.binaryTarball.x86_64-linux}/*.tar.*'
mkdir /dest-nix
mount -o bind /dest-nix /nix # Provide a writable /nix.
chown alice /nix
su - alice -c '_NIX_INSTALLER_TEST=1 ./nix-*/install'
su - alice -c 'nix-store --verify'
su - alice -c 'PAGER= nix-store -qR ${self.hydraJobs.build.x86_64-linux}'
# Check whether 'nix upgrade-nix' works.
cat > /tmp/paths.nix <<EOF
{
x86_64-linux = "${self.hydraJobs.build.x86_64-linux}";
}
EOF
su - alice -c 'nix --experimental-features nix-command upgrade-nix -vvv --nix-store-paths-url file:///tmp/paths.nix'
(! [ -L /home/alice/.profile-1-link ])
su - alice -c 'PAGER= nix-store -qR ${self.hydraJobs.build.x86_64-linux}'
mkdir -p $out/nix-support
touch $out/nix-support/hydra-build-products
umount /nix
'');
/*
# Check whether we can still evaluate all of Nixpkgs.
tests.evalNixpkgs =
import (nixpkgs + "/pkgs/top-level/make-tarball.nix") {
# FIXME: fix pkgs/top-level/make-tarball.nix in NixOS to not require a revCount.
inherit nixpkgs;
pkgs = nixpkgsFor.x86_64-linux;
officialRelease = false;
};
# Check whether we can still evaluate NixOS.
tests.evalNixOS =
with nixpkgsFor.x86_64-linux;
runCommand "eval-nixos" { buildInputs = [ nix ]; }
''
export NIX_STATE_DIR=$TMPDIR
nix-instantiate ${nixpkgs}/nixos/release-combined.nix -A tested --dry-run \
--arg nixpkgs '{ outPath = ${nixpkgs}; revCount = 123; shortRev = "abcdefgh"; }'
touch $out
'';
*/
};
checks = forAllSystems (system: {
binaryTarball = self.hydraJobs.binaryTarball.${system};
perlBindings = self.hydraJobs.perlBindings.${system};
});
packages = forAllSystems (system: {
inherit (nixpkgsFor.${system}) nix;
});
defaultPackage = forAllSystems (system: self.packages.${system}.nix);
devShell = forAllSystems (system:
with nixpkgsFor.${system};
with commonDeps pkgs;
stdenv.mkDerivation {
name = "nix";
buildInputs = buildDeps ++ propagatedDeps ++ perlDeps;
inherit configureFlags;
enableParallelBuilding = true;
installFlags = "sysconfdir=$(out)/etc";
shellHook =
''
export prefix=$(pwd)/inst
configureFlags+=" --prefix=$prefix"
PKG_CONFIG_PATH=$prefix/lib/pkgconfig:$PKG_CONFIG_PATH
PATH=$prefix/bin:$PATH
unset PYTHONPATH
'';
});
};
}

2
local.mk
View file

@ -8,7 +8,7 @@ clean-files += Makefile.config
GLOBAL_CXXFLAGS += -Wno-deprecated-declarations
$(foreach i, config.h $(call rwildcard, src/lib*, *.hh), \
$(foreach i, config.h $(wildcard src/lib*/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix, 0644)))
$(GCH) $(PCH): src/libutil/util.hh config.h

19
misc/bash/completion.sh Normal file
View file

@ -0,0 +1,19 @@
function _complete_nix {
local -a words
local cword cur
_get_comp_words_by_ref -n ':=&' words cword cur
local have_type
while IFS= read -r line; do
if [[ -z $have_type ]]; then
have_type=1
if [[ $line = filenames ]]; then
compopt -o filenames
fi
else
COMPREPLY+=("$line")
fi
done < <(NIX_GET_COMPLETIONS=$cword "${words[@]}")
__ltrim_colon_completions "$cur"
}
complete -F _complete_nix nix

1
misc/bash/local.mk Normal file
View file

@ -0,0 +1 @@
$(eval $(call install-file-as, $(d)/completion.sh, $(datarootdir)/bash-completion/completions/nix, 0644))

4
mk/precompiled-headers.mk
View file

@ -21,13 +21,13 @@ clean-files += $(GCH) $(PCH)
ifeq ($(PRECOMPILE_HEADERS), 1)
ifeq ($(CXX), g++)
ifeq ($(findstring g++,$(CXX)), g++)
GLOBAL_CXXFLAGS_PCH += -include $(buildprefix)precompiled-headers.h -Winvalid-pch
GLOBAL_ORDER_AFTER += $(GCH)
else ifeq ($(CXX), clang++)
else ifeq ($(findstring clang++,$(CXX)), clang++)
GLOBAL_CXXFLAGS_PCH += -include-pch $(PCH) -Winvalid-pch

9
perl/lib/Nix/Store.xs
View file

@ -80,7 +80,7 @@ SV * queryReferences(char * path)
SV * queryPathHash(char * path)
PPCODE:
try {
auto s = store()->queryPathInfo(store()->parseStorePath(path))->narHash.to_string(Base32, true);
auto s = store()->queryPathInfo(store()->parseStorePath(path))->narHash->to_string(Base32, true);
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
} catch (Error & e) {
croak("%s", e.what());
@ -106,7 +106,7 @@ SV * queryPathInfo(char * path, int base32)
XPUSHs(&PL_sv_undef);
else
XPUSHs(sv_2mortal(newSVpv(store()->printStorePath(*info->deriver).c_str(), 0)));
auto s = info->narHash.to_string(base32 ? Base32 : Base16, true);
auto s = info->narHash->to_string(base32 ? Base32 : Base16, true);
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
mXPUSHi(info->registrationTime);
mXPUSHi(info->narSize);
@ -304,7 +304,10 @@ SV * derivationFromPath(char * drvPath)
HV * outputs = newHV();
for (auto & i : drv.outputs)
hv_store(outputs, i.first.c_str(), i.first.size(), newSVpv(store()->printStorePath(i.second.path).c_str(), 0), 0);
hv_store(
outputs, i.first.c_str(), i.first.size(),
newSVpv(store()->printStorePath(i.second.path(*store(), drv.name)).c_str(), 0),
0);
hv_stores(hash, "outputs", newRV((SV *) outputs));
AV * inputDrvs = newAV();

82
release-common.nix
View file

@ -1,82 +0,0 @@
{ pkgs }:
with pkgs;
rec {
# Use "busybox-sandbox-shell" if present,
# if not (legacy) fallback and hope it's sufficient.
sh = pkgs.busybox-sandbox-shell or (busybox.override {
useMusl = true;
enableStatic = true;
enableMinimal = true;
extraConfig = ''
CONFIG_FEATURE_FANCY_ECHO y
CONFIG_FEATURE_SH_MATH y
CONFIG_FEATURE_SH_MATH_64 y
CONFIG_ASH y
CONFIG_ASH_OPTIMIZE_FOR_SIZE y
CONFIG_ASH_ALIAS y
CONFIG_ASH_BASH_COMPAT y
CONFIG_ASH_CMDCMD y
CONFIG_ASH_ECHO y
CONFIG_ASH_GETOPTS y
CONFIG_ASH_INTERNAL_GLOB y
CONFIG_ASH_JOB_CONTROL y
CONFIG_ASH_PRINTF y
CONFIG_ASH_TEST y
'';
});
configureFlags =
lib.optionals stdenv.isLinux [
"--with-sandbox-shell=${sh}/bin/busybox"
];
buildDeps =
[ bison
flex
libxml2
libxslt
docbook5
docbook_xsl_ns
autoconf-archive
autoreconfHook
curl
bzip2 xz brotli zlib editline
openssl pkgconfig sqlite
libarchive
boost
nlohmann_json
# Tests
git
mercurial
gmock
]
++ lib.optionals stdenv.isLinux [libseccomp utillinuxMinimal]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
++ lib.optional (stdenv.isLinux || stdenv.isDarwin)
((aws-sdk-cpp.override {
apis = ["s3" "transfer"];
customMemoryManagement = false;
}).overrideDerivation (args: {
/*
patches = args.patches or [] ++ [ (fetchpatch {
url = https://github.com/edolstra/aws-sdk-cpp/commit/3e07e1f1aae41b4c8b340735ff9e8c735f0c063f.patch;
sha256 = "1pij0v449p166f9l29x7ppzk8j7g9k9mp15ilh5qxp29c7fnvxy2";
}) ];
*/
}));
propagatedDeps =
[ (boehmgc.override { enableLargeConfig = true; })
];
perlDeps =
[ perl
perlPackages.DBDSQLite
];
}

303
release.nix
View file

@ -1,303 +0,0 @@
{ nix ? builtins.fetchGit ./.
, nixpkgs ? builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/nixos-20.03-small.tar.gz
, officialRelease ? false
, systems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ]
}:
let
pkgs = import nixpkgs { system = builtins.currentSystem or "x86_64-linux"; };
version =
builtins.readFile ./.version
+ (if officialRelease then "" else "pre${toString nix.revCount}_${nix.shortRev}");
jobs = rec {
build = pkgs.lib.genAttrs systems (system:
let pkgs = import nixpkgs { inherit system; }; in
with pkgs;
with import ./release-common.nix { inherit pkgs; };
stdenv.mkDerivation {
name = "nix-${version}";
src = nix;
outputs = [ "out" "dev" "doc" ];
buildInputs = buildDeps;
propagatedBuildInputs = propagatedDeps;
preConfigure =
''
# Copy libboost_context so we don't get all of Boost in our closure.
# https://github.com/NixOS/nixpkgs/issues/45462
mkdir -p $out/lib
cp -pd ${boost}/lib/{libboost_context*,libboost_thread*,libboost_system*} $out/lib
rm -f $out/lib/*.a
${lib.optionalString stdenv.isLinux ''
chmod u+w $out/lib/*.so.*
patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib $out/lib/libboost_thread.so.*
''}
(cd perl; autoreconf --install --force --verbose)
'';
configureFlags = configureFlags ++
[ "--sysconfdir=/etc" ];
enableParallelBuilding = true;
makeFlags = "profiledir=$(out)/etc/profile.d";
installFlags = "sysconfdir=$(out)/etc";
postInstall = ''
mkdir -p $doc/nix-support
echo "doc manual $doc/share/doc/nix/manual" >> $doc/nix-support/hydra-build-products
'';
doCheck = true;
doInstallCheck = true;
installCheckFlags = "sysconfdir=$(out)/etc";
separateDebugInfo = true;
});
perlBindings = pkgs.lib.genAttrs systems (system:
let pkgs = import nixpkgs { inherit system; }; in with pkgs;
releaseTools.nixBuild {
name = "nix-perl-${version}";
src = nix;
buildInputs =
[ autoconf-archive
autoreconfHook
jobs.build.${system}
curl
bzip2
xz
pkgconfig
pkgs.perl
boost
]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium;
configureFlags = ''
--with-dbi=${perlPackages.DBI}/${pkgs.perl.libPrefix}
--with-dbd-sqlite=${perlPackages.DBDSQLite}/${pkgs.perl.libPrefix}
'';
enableParallelBuilding = true;
postUnpack = "sourceRoot=$sourceRoot/perl";
});
binaryTarball = pkgs.lib.genAttrs systems (system:
with import nixpkgs { inherit system; };
let
toplevel = builtins.getAttr system jobs.build;
installerClosureInfo = closureInfo { rootPaths = [ toplevel cacert ]; };
in
runCommand "nix-binary-tarball-${version}"
{ #nativeBuildInputs = lib.optional (system != "aarch64-linux") shellcheck;
meta.description = "Distribution-independent Nix bootstrap binaries for ${system}";
}
''
cp ${installerClosureInfo}/registration $TMPDIR/reginfo
cp ${./scripts/create-darwin-volume.sh} $TMPDIR/create-darwin-volume.sh
substitute ${./scripts/install-nix-from-closure.sh} $TMPDIR/install \
--subst-var-by nix ${toplevel} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-darwin-multi-user.sh} $TMPDIR/install-darwin-multi-user.sh \
--subst-var-by nix ${toplevel} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-systemd-multi-user.sh} $TMPDIR/install-systemd-multi-user.sh \
--subst-var-by nix ${toplevel} \
--subst-var-by cacert ${cacert}
substitute ${./scripts/install-multi-user.sh} $TMPDIR/install-multi-user \
--subst-var-by nix ${toplevel} \
--subst-var-by cacert ${cacert}
if type -p shellcheck; then
# SC1090: Don't worry about not being able to find
# $nix/etc/profile.d/nix.sh
shellcheck --exclude SC1090 $TMPDIR/install
shellcheck $TMPDIR/create-darwin-volume.sh
shellcheck $TMPDIR/install-darwin-multi-user.sh
shellcheck $TMPDIR/install-systemd-multi-user.sh
# SC1091: Don't panic about not being able to source
# /etc/profile
# SC2002: Ignore "useless cat" "error", when loading
# .reginfo, as the cat is a much cleaner
# implementation, even though it is "useless"
# SC2116: Allow ROOT_HOME=$(echo ~root) for resolving
# root's home directory
shellcheck --external-sources \
--exclude SC1091,SC2002,SC2116 $TMPDIR/install-multi-user
fi
chmod +x $TMPDIR/install
chmod +x $TMPDIR/create-darwin-volume.sh
chmod +x $TMPDIR/install-darwin-multi-user.sh
chmod +x $TMPDIR/install-systemd-multi-user.sh
chmod +x $TMPDIR/install-multi-user
dir=nix-${version}-${system}
fn=$out/$dir.tar.xz
mkdir -p $out/nix-support
echo "file binary-dist $fn" >> $out/nix-support/hydra-build-products
tar cvfJ $fn \
--owner=0 --group=0 --mode=u+rw,uga+r \
--absolute-names \
--hard-dereference \
--transform "s,$TMPDIR/install,$dir/install," \
--transform "s,$TMPDIR/create-darwin-volume.sh,$dir/create-darwin-volume.sh," \
--transform "s,$TMPDIR/reginfo,$dir/.reginfo," \
--transform "s,$NIX_STORE,$dir/store,S" \
$TMPDIR/install \
$TMPDIR/create-darwin-volume.sh \
$TMPDIR/install-darwin-multi-user.sh \
$TMPDIR/install-systemd-multi-user.sh \
$TMPDIR/install-multi-user \
$TMPDIR/reginfo \
$(cat ${installerClosureInfo}/store-paths)
'');
coverage =
with pkgs;
with import ./release-common.nix { inherit pkgs; };
releaseTools.coverageAnalysis {
name = "nix-coverage-${version}";
src = nix;
enableParallelBuilding = true;
buildInputs = buildDeps ++ propagatedDeps;
dontInstall = false;
doInstallCheck = true;
lcovFilter = [ "*/boost/*" "*-tab.*" ];
# We call `dot', and even though we just use it to
# syntax-check generated dot files, it still requires some
# fonts. So provide those.
FONTCONFIG_FILE = texFunctions.fontsConf;
# To test building without precompiled headers.
makeFlagsArray = [ "PRECOMPILE_HEADERS=0" ];
};
# System tests.
tests.remoteBuilds = (import ./tests/remote-builds.nix rec {
inherit nixpkgs;
nix = build.x86_64-linux; system = "x86_64-linux";
});
tests.nix-copy-closure = (import ./tests/nix-copy-closure.nix rec {
inherit nixpkgs;
nix = build.x86_64-linux; system = "x86_64-linux";
});
tests.setuid = pkgs.lib.genAttrs
["i686-linux" "x86_64-linux"]
(system:
import ./tests/setuid.nix rec {
inherit nixpkgs;
nix = build.${system}; inherit system;
});
tests.binaryTarball =
with import nixpkgs { system = "x86_64-linux"; };
vmTools.runInLinuxImage (runCommand "nix-binary-tarball-test"
{ diskImage = vmTools.diskImages.ubuntu1204x86_64;
}
''
set -x
useradd -m alice
su - alice -c 'tar xf ${binaryTarball.x86_64-linux}/*.tar.*'
mkdir /dest-nix
mount -o bind /dest-nix /nix # Provide a writable /nix.
chown alice /nix
su - alice -c '_NIX_INSTALLER_TEST=1 ./nix-*/install'
su - alice -c 'nix-store --verify'
su - alice -c 'PAGER= nix-store -qR ${build.x86_64-linux}'
# Check whether 'nix upgrade-nix' works.
cat > /tmp/paths.nix <<EOF
{
x86_64-linux = "${build.x86_64-linux}";
}
EOF
su - alice -c 'nix --experimental-features nix-command upgrade-nix -vvv --nix-store-paths-url file:///tmp/paths.nix'
(! [ -L /home/alice/.profile-1-link ])
su - alice -c 'PAGER= nix-store -qR ${build.x86_64-linux}'
mkdir -p $out/nix-support
touch $out/nix-support/hydra-build-products
umount /nix
''); # */
/*
tests.evalNixpkgs =
import (nixpkgs + "/pkgs/top-level/make-tarball.nix") {
inherit nixpkgs;
inherit pkgs;
nix = build.x86_64-linux;
officialRelease = false;
};
tests.evalNixOS =
pkgs.runCommand "eval-nixos" { buildInputs = [ build.x86_64-linux ]; }
''
export NIX_STATE_DIR=$TMPDIR
nix-instantiate ${nixpkgs}/nixos/release-combined.nix -A tested --dry-run \
--arg nixpkgs '{ outPath = ${nixpkgs}; revCount = 123; shortRev = "abcdefgh"; }'
touch $out
'';
*/
installerScript =
pkgs.runCommand "installer-script"
{ buildInputs = [ build.${builtins.currentSystem or "x86_64-linux"} ]; }
''
mkdir -p $out/nix-support
substitute ${./scripts/install.in} $out/install \
${pkgs.lib.concatMapStrings
(system: "--replace '@binaryTarball_${system}@' $(nix --experimental-features nix-command hash-file --base16 --type sha256 ${binaryTarball.${system}}/*.tar.xz) ")
systems
} \
--replace '@nixVersion@' ${version}
echo "file installer $out/install" >> $out/nix-support/hydra-build-products
'';
};
in jobs

37
scripts/install-multi-user.sh
View file

@ -37,6 +37,8 @@ readonly PROFILE_NIX_FILE="$NIX_ROOT/var/nix/profiles/default/etc/profile.d/nix-
readonly NIX_INSTALLED_NIX="@nix@"
readonly NIX_INSTALLED_CACERT="@cacert@"
#readonly NIX_INSTALLED_NIX="/nix/store/j8dbv5w6jl34caywh2ygdy88knx1mdf7-nix-2.3.6"
#readonly NIX_INSTALLED_CACERT="/nix/store/7dxhzymvy330i28ii676fl1pqwcahv2f-nss-cacert-3.49.2"
readonly EXTRACTED_NIX_PATH="$(dirname "$0")"
readonly ROOT_HOME=$(echo ~root)
@ -69,9 +71,11 @@ uninstall_directions() {
subheader "Uninstalling nix:"
local step=0
if poly_service_installed_check; then
if [ -e /run/systemd/system ] && poly_service_installed_check; then
step=$((step + 1))
poly_service_uninstall_directions "$step"
else
step=$((step + 1))
fi
for profile_target in "${PROFILE_TARGETS[@]}"; do
@ -250,6 +254,8 @@ function finish_success {
echo "But fetching the nixpkgs channel failed. (Are you offline?)"
echo "To try again later, run \"sudo -i nix-channel --update nixpkgs\"."
fi
if [ -e /run/systemd/system ]; then
cat <<EOF
Before Nix will work in your existing shells, you'll need to close
@ -264,6 +270,26 @@ hesitate:
$(contactme)
EOF
else
cat <<EOF
Before Nix will work in your existing shells, you'll need to close
them and open them again. Other than that, you should be ready to go.
Try it! Open a new terminal, and type:
$ sudo nix-daemon
$ nix-shell -p nix-info --run "nix-info -m"
Additionally, you may want to add nix-daemon to your init-system.
Thank you for using this installer. If you have any feedback, don't
hesitate:
$(contactme)
EOF
fi
}
@ -664,12 +690,8 @@ main() {
# shellcheck source=./install-darwin-multi-user.sh
. "$EXTRACTED_NIX_PATH/install-darwin-multi-user.sh"
elif [ "$(uname -s)" = "Linux" ]; then
if [ -e /run/systemd/system ]; then
# shellcheck source=./install-systemd-multi-user.sh
. "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh"
else
failure "Sorry, the multi-user installation requires systemd on Linux (detected using /run/systemd/system)"
fi
. "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh" # most of this works on non-systemd distros also
else
failure "Sorry, I don't know what to do on $(uname)"
fi
@ -702,7 +724,10 @@ main() {
setup_default_profile
place_nix_configuration
if [ -e /run/systemd/system ]; then
poly_configure_nix_daemon_service
fi
trap finish_success EXIT
}

8
scripts/install-nix-from-closure.sh
View file

@ -35,7 +35,7 @@ fi
# Determine if we could use the multi-user installer or not
if [ "$(uname -s)" = "Darwin" ]; then
echo "Note: a multi-user installation is possible. See https://nixos.org/nix/manual/#sect-multi-user-installation" >&2
elif [ "$(uname -s)" = "Linux" ] && [ -e /run/systemd/system ]; then
elif [ "$(uname -s)" = "Linux" ]; then
echo "Note: a multi-user installation is possible. See https://nixos.org/nix/manual/#sect-multi-user-installation" >&2
fi
@ -122,7 +122,7 @@ if [ "$(uname -s)" = "Darwin" ]; then
fi
if [ "$INSTALL_MODE" = "daemon" ]; then
printf '\e[1;31mSwitching to the Daemon-based Installer\e[0m\n'
printf '\e[1;31mSwitching to the Multi-user Installer\e[0m\n'
exec "$self/install-multi-user"
exit 0
fi
@ -207,7 +207,7 @@ if [ -z "$NIX_INSTALLER_NO_MODIFY_PROFILE" ]; then
if [ -w "$fn" ]; then
if ! grep -q "$p" "$fn"; then
echo "modifying $fn..." >&2
echo "if [ -e $p ]; then . $p; fi # added by Nix installer" >> "$fn"
echo -e "\nif [ -e $p ]; then . $p; fi # added by Nix installer" >> "$fn"
fi
added=1
break
@ -218,7 +218,7 @@ if [ -z "$NIX_INSTALLER_NO_MODIFY_PROFILE" ]; then
if [ -w "$fn" ]; then
if ! grep -q "$p" "$fn"; then
echo "modifying $fn..." >&2
echo "if [ -e $p ]; then . $p; fi # added by Nix installer" >> "$fn"
echo -e "\nif [ -e $p ]; then . $p; fi # added by Nix installer" >> "$fn"
fi
added=1
break

28
shell.nix
View file

@ -1,25 +1,3 @@
{ useClang ? false }:
with import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/nixos-20.03-small.tar.gz) {};
with import ./release-common.nix { inherit pkgs; };
(if useClang then clangStdenv else stdenv).mkDerivation {
name = "nix";
buildInputs = buildDeps ++ propagatedDeps ++ perlDeps;
inherit configureFlags;
enableParallelBuilding = true;
installFlags = "sysconfdir=$(out)/etc";
shellHook =
''
export prefix=$(pwd)/inst
configureFlags+=" --prefix=$prefix"
PKG_CONFIG_PATH=$prefix/lib/pkgconfig:$PKG_CONFIG_PATH
PATH=$prefix/bin:$PATH
'';
}
(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
src = ./.;
}).shellNix

8
src/build-remote/build-remote.cc
View file

@ -33,7 +33,7 @@ std::string escapeUri(std::string uri)
static string currentLoad;
static AutoCloseFD openSlotLock(const Machine & m, unsigned long long slot)
static AutoCloseFD openSlotLock(const Machine & m, uint64_t slot)
{
return openLockFile(fmt("%s/%s-%d", currentLoad, escapeUri(m.storeUri), slot), true);
}
@ -119,7 +119,7 @@ static int _main(int argc, char * * argv)
bool rightType = false;
Machine * bestMachine = nullptr;
unsigned long long bestLoad = 0;
uint64_t bestLoad = 0;
for (auto & m : machines) {
debug("considering building on remote machine '%s'", m.storeUri);
@ -130,8 +130,8 @@ static int _main(int argc, char * * argv)
m.mandatoryMet(requiredFeatures)) {
rightType = true;
AutoCloseFD free;
unsigned long long load = 0;
for (unsigned long long slot = 0; slot < m.maxJobs; ++slot) {
uint64_t load = 0;
for (uint64_t slot = 0; slot < m.maxJobs; ++slot) {
auto slotLock = openSlotLock(m, slot);
if (lockFile(slotLock.get(), ltWrite, false)) {
if (!free) {

25
src/libexpr/common-eval-args.cc
View file

@ -4,6 +4,8 @@
#include "util.hh"
#include "eval.hh"
#include "fetchers.hh"
#include "registry.hh"
#include "flake/flakeref.hh"
#include "store-api.hh"
namespace nix {
@ -31,6 +33,27 @@ MixEvalArgs::MixEvalArgs()
.labels = {"path"},
.handler = {[&](std::string s) { searchPath.push_back(s); }}
});
addFlag({
.longName = "impure",
.description = "allow access to mutable paths and repositories",
.handler = {[&]() {
evalSettings.pureEval = false;
}},
});
addFlag({
.longName = "override-flake",
.description = "override a flake registry value",
.labels = {"original-ref", "resolved-ref"},
.handler = {[&](std::string _from, std::string _to) {
auto from = parseFlakeRef(_from, absPath("."));
auto to = parseFlakeRef(_to, absPath("."));
fetchers::Attrs extraAttrs;
if (to.subdir != "") extraAttrs["dir"] = to.subdir;
fetchers::overrideRegistry(from.input, to.input, extraAttrs);
}}
});
}
Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
@ -53,7 +76,7 @@ Path lookupFileArg(EvalState & state, string s)
if (isUri(s)) {
return state.store->toRealPath(
fetchers::downloadTarball(
state.store, resolveUri(s), "source", false).storePath);
state.store, resolveUri(s), "source", false).first.storePath);
} else if (s.size() > 2 && s.at(0) == '<' && s.at(s.size() - 1) == '>') {
Path p = s.substr(1, s.size() - 2);
return state.findFile(p);

616
src/libexpr/eval-cache.cc Normal file
View file

@ -0,0 +1,616 @@
#include "eval-cache.hh"
#include "sqlite.hh"
#include "eval.hh"
#include "eval-inline.hh"
#include "store-api.hh"
namespace nix::eval_cache {
static const char * schema = R"sql(
create table if not exists Attributes (
parent integer not null,
name text,
type integer not null,
value text,
context text,
primary key (parent, name)
);
)sql";
struct AttrDb
{
std::atomic_bool failed{false};
struct State
{
SQLite db;
SQLiteStmt insertAttribute;
SQLiteStmt insertAttributeWithContext;
SQLiteStmt queryAttribute;
SQLiteStmt queryAttributes;
std::unique_ptr<SQLiteTxn> txn;
};
std::unique_ptr<Sync<State>> _state;
AttrDb(const Hash & fingerprint)
: _state(std::make_unique<Sync<State>>())
{
auto state(_state->lock());
Path cacheDir = getCacheDir() + "/nix/eval-cache-v2";
createDirs(cacheDir);
Path dbPath = cacheDir + "/" + fingerprint.to_string(Base16, false) + ".sqlite";
state->db = SQLite(dbPath);
state->db.isCache();
state->db.exec(schema);
state->insertAttribute.create(state->db,
"insert or replace into Attributes(parent, name, type, value) values (?, ?, ?, ?)");
state->insertAttributeWithContext.create(state->db,
"insert or replace into Attributes(parent, name, type, value, context) values (?, ?, ?, ?, ?)");
state->queryAttribute.create(state->db,
"select rowid, type, value, context from Attributes where parent = ? and name = ?");
state->queryAttributes.create(state->db,
"select name from Attributes where parent = ?");
state->txn = std::make_unique<SQLiteTxn>(state->db);
}
~AttrDb()
{
try {
auto state(_state->lock());
if (!failed)
state->txn->commit();
state->txn.reset();
} catch (...) {
ignoreException();
}
}
template<typename F>
AttrId doSQLite(F && fun)
{
if (failed) return 0;
try {
return fun();
} catch (SQLiteError &) {
ignoreException();
failed = true;
return 0;
}
}
AttrId setAttrs(
AttrKey key,
const std::vector<Symbol> & attrs)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::FullAttrs)
(0, false).exec();
AttrId rowId = state->db.getLastInsertedRowId();
assert(rowId);
for (auto & attr : attrs)
state->insertAttribute.use()
(rowId)
(attr)
(AttrType::Placeholder)
(0, false).exec();
return rowId;
});
}
AttrId setString(
AttrKey key,
std::string_view s,
const char * * context = nullptr)
{
return doSQLite([&]()
{
auto state(_state->lock());
if (context) {
std::string ctx;
for (const char * * p = context; *p; ++p) {
if (p != context) ctx.push_back(' ');
ctx.append(*p);
}
state->insertAttributeWithContext.use()
(key.first)
(key.second)
(AttrType::String)
(s)
(ctx).exec();
} else {
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::String)
(s).exec();
}
return state->db.getLastInsertedRowId();
});
}
AttrId setBool(
AttrKey key,
bool b)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::Bool)
(b ? 1 : 0).exec();
return state->db.getLastInsertedRowId();
});
}
AttrId setPlaceholder(AttrKey key)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::Placeholder)
(0, false).exec();
return state->db.getLastInsertedRowId();
});
}
AttrId setMissing(AttrKey key)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::Missing)
(0, false).exec();
return state->db.getLastInsertedRowId();
});
}
AttrId setMisc(AttrKey key)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::Misc)
(0, false).exec();
return state->db.getLastInsertedRowId();
});
}
AttrId setFailed(AttrKey key)
{
return doSQLite([&]()
{
auto state(_state->lock());
state->insertAttribute.use()
(key.first)
(key.second)
(AttrType::Failed)
(0, false).exec();
return state->db.getLastInsertedRowId();
});
}
std::optional<std::pair<AttrId, AttrValue>> getAttr(
AttrKey key,
SymbolTable & symbols)
{
auto state(_state->lock());
auto queryAttribute(state->queryAttribute.use()(key.first)(key.second));
if (!queryAttribute.next()) return {};
auto rowId = (AttrType) queryAttribute.getInt(0);
auto type = (AttrType) queryAttribute.getInt(1);
switch (type) {
case AttrType::Placeholder:
return {{rowId, placeholder_t()}};
case AttrType::FullAttrs: {
// FIXME: expensive, should separate this out.
std::vector<Symbol> attrs;
auto queryAttributes(state->queryAttributes.use()(rowId));
while (queryAttributes.next())
attrs.push_back(symbols.create(queryAttributes.getStr(0)));
return {{rowId, attrs}};
}
case AttrType::String: {
std::vector<std::pair<Path, std::string>> context;
if (!queryAttribute.isNull(3))
for (auto & s : tokenizeString<std::vector<std::string>>(queryAttribute.getStr(3), ";"))
context.push_back(decodeContext(s));
return {{rowId, string_t{queryAttribute.getStr(2), context}}};
}
case AttrType::Bool:
return {{rowId, queryAttribute.getInt(2) != 0}};
case AttrType::Missing:
return {{rowId, missing_t()}};
case AttrType::Misc:
return {{rowId, misc_t()}};
case AttrType::Failed:
return {{rowId, failed_t()}};
default:
throw Error("unexpected type in evaluation cache");
}
}
};
static std::shared_ptr<AttrDb> makeAttrDb(const Hash & fingerprint)
{
try {
return std::make_shared<AttrDb>(fingerprint);
} catch (SQLiteError &) {
ignoreException();
return nullptr;
}
}
EvalCache::EvalCache(
std::optional<std::reference_wrapper<const Hash>> useCache,
EvalState & state,
RootLoader rootLoader)
: db(useCache ? makeAttrDb(*useCache) : nullptr)
, state(state)
, rootLoader(rootLoader)
{
}
Value * EvalCache::getRootValue()
{
if (!value) {
debug("getting root value");
value = allocRootValue(rootLoader());
}
return *value;
}
std::shared_ptr<AttrCursor> EvalCache::getRoot()
{
return std::make_shared<AttrCursor>(ref(shared_from_this()), std::nullopt);
}
AttrCursor::AttrCursor(
ref<EvalCache> root,
Parent parent,
Value * value,
std::optional<std::pair<AttrId, AttrValue>> && cachedValue)
: root(root), parent(parent), cachedValue(std::move(cachedValue))
{
if (value)
_value = allocRootValue(value);
}
AttrKey AttrCursor::getKey()
{
if (!parent)
return {0, root->state.sEpsilon};
if (!parent->first->cachedValue) {
parent->first->cachedValue = root->db->getAttr(
parent->first->getKey(), root->state.symbols);
assert(parent->first->cachedValue);
}
return {parent->first->cachedValue->first, parent->second};
}
Value & AttrCursor::getValue()
{
if (!_value) {
if (parent) {
auto & vParent = parent->first->getValue();
root->state.forceAttrs(vParent);
auto attr = vParent.attrs->get(parent->second);
if (!attr)
throw Error("attribute '%s' is unexpectedly missing", getAttrPathStr());
_value = allocRootValue(attr->value);
} else
_value = allocRootValue(root->getRootValue());
}
return **_value;
}
std::vector<Symbol> AttrCursor::getAttrPath() const
{
if (parent) {
auto attrPath = parent->first->getAttrPath();
attrPath.push_back(parent->second);
return attrPath;
} else
return {};
}
std::vector<Symbol> AttrCursor::getAttrPath(Symbol name) const
{
auto attrPath = getAttrPath();
attrPath.push_back(name);
return attrPath;
}
std::string AttrCursor::getAttrPathStr() const
{
return concatStringsSep(".", getAttrPath());
}
std::string AttrCursor::getAttrPathStr(Symbol name) const
{
return concatStringsSep(".", getAttrPath(name));
}
Value & AttrCursor::forceValue()
{
debug("evaluating uncached attribute %s", getAttrPathStr());
auto & v = getValue();
try {
root->state.forceValue(v);
} catch (EvalError &) {
debug("setting '%s' to failed", getAttrPathStr());
if (root->db)
cachedValue = {root->db->setFailed(getKey()), failed_t()};
throw;
}
if (root->db && (!cachedValue || std::get_if<placeholder_t>(&cachedValue->second))) {
if (v.type == tString)
cachedValue = {root->db->setString(getKey(), v.string.s, v.string.context), v.string.s};
else if (v.type == tPath)
cachedValue = {root->db->setString(getKey(), v.path), v.path};
else if (v.type == tBool)
cachedValue = {root->db->setBool(getKey(), v.boolean), v.boolean};
else if (v.type == tAttrs)
; // FIXME: do something?
else
cachedValue = {root->db->setMisc(getKey()), misc_t()};
}
return v;
}
std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(Symbol name)
{
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
if (cachedValue) {
if (auto attrs = std::get_if<std::vector<Symbol>>(&cachedValue->second)) {
for (auto & attr : *attrs)
if (attr == name)
return std::make_shared<AttrCursor>(root, std::make_pair(shared_from_this(), name));
return nullptr;
} else if (std::get_if<placeholder_t>(&cachedValue->second)) {
auto attr = root->db->getAttr({cachedValue->first, name}, root->state.symbols);
if (attr) {
if (std::get_if<missing_t>(&attr->second))
return nullptr;
else if (std::get_if<failed_t>(&attr->second))
throw EvalError("cached failure of attribute '%s'", getAttrPathStr(name));
else
return std::make_shared<AttrCursor>(root,
std::make_pair(shared_from_this(), name), nullptr, std::move(attr));
}
// Incomplete attrset, so need to fall thru and
// evaluate to see whether 'name' exists
} else
return nullptr;
//throw TypeError("'%s' is not an attribute set", getAttrPathStr());
}
}
auto & v = forceValue();
if (v.type != tAttrs)
return nullptr;
//throw TypeError("'%s' is not an attribute set", getAttrPathStr());
auto attr = v.attrs->get(name);
if (!attr) {
if (root->db) {
if (!cachedValue)
cachedValue = {root->db->setPlaceholder(getKey()), placeholder_t()};
root->db->setMissing({cachedValue->first, name});
}
return nullptr;
}
std::optional<std::pair<AttrId, AttrValue>> cachedValue2;
if (root->db) {
if (!cachedValue)
cachedValue = {root->db->setPlaceholder(getKey()), placeholder_t()};
cachedValue2 = {root->db->setPlaceholder({cachedValue->first, name}), placeholder_t()};
}
return std::make_shared<AttrCursor>(
root, std::make_pair(shared_from_this(), name), attr->value, std::move(cachedValue2));
}
std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name)
{
return maybeGetAttr(root->state.symbols.create(name));
}
std::shared_ptr<AttrCursor> AttrCursor::getAttr(Symbol name)
{
auto p = maybeGetAttr(name);
if (!p)
throw Error("attribute '%s' does not exist", getAttrPathStr(name));
return p;
}
std::shared_ptr<AttrCursor> AttrCursor::getAttr(std::string_view name)
{
return getAttr(root->state.symbols.create(name));
}
std::shared_ptr<AttrCursor> AttrCursor::findAlongAttrPath(const std::vector<Symbol> & attrPath)
{
auto res = shared_from_this();
for (auto & attr : attrPath) {
res = res->maybeGetAttr(attr);
if (!res) return {};
}
return res;
}
std::string AttrCursor::getString()
{
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
if (cachedValue && !std::get_if<placeholder_t>(&cachedValue->second)) {
if (auto s = std::get_if<string_t>(&cachedValue->second)) {
debug("using cached string attribute '%s'", getAttrPathStr());
return s->first;
} else
throw TypeError("'%s' is not a string", getAttrPathStr());
}
}
auto & v = forceValue();
if (v.type != tString && v.type != tPath)
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type));
return v.type == tString ? v.string.s : v.path;
}
string_t AttrCursor::getStringWithContext()
{
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
if (cachedValue && !std::get_if<placeholder_t>(&cachedValue->second)) {
if (auto s = std::get_if<string_t>(&cachedValue->second)) {
debug("using cached string attribute '%s'", getAttrPathStr());
return *s;
} else
throw TypeError("'%s' is not a string", getAttrPathStr());
}
}
auto & v = forceValue();
if (v.type == tString)
return {v.string.s, v.getContext()};
else if (v.type == tPath)
return {v.path, {}};
else
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type));
}
bool AttrCursor::getBool()
{
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
if (cachedValue && !std::get_if<placeholder_t>(&cachedValue->second)) {
if (auto b = std::get_if<bool>(&cachedValue->second)) {
debug("using cached Boolean attribute '%s'", getAttrPathStr());
return *b;
} else
throw TypeError("'%s' is not a Boolean", getAttrPathStr());
}
}
auto & v = forceValue();
if (v.type != tBool)
throw TypeError("'%s' is not a Boolean", getAttrPathStr());
return v.boolean;
}
std::vector<Symbol> AttrCursor::getAttrs()
{
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
if (cachedValue && !std::get_if<placeholder_t>(&cachedValue->second)) {
if (auto attrs = std::get_if<std::vector<Symbol>>(&cachedValue->second)) {
debug("using cached attrset attribute '%s'", getAttrPathStr());
return *attrs;
} else
throw TypeError("'%s' is not an attribute set", getAttrPathStr());
}
}
auto & v = forceValue();
if (v.type != tAttrs)
throw TypeError("'%s' is not an attribute set", getAttrPathStr());
std::vector<Symbol> attrs;
for (auto & attr : *getValue().attrs)
attrs.push_back(attr.name);
std::sort(attrs.begin(), attrs.end(), [](const Symbol & a, const Symbol & b) {
return (const string &) a < (const string &) b;
});
if (root->db)
cachedValue = {root->db->setAttrs(getKey(), attrs), attrs};
return attrs;
}
bool AttrCursor::isDerivation()
{
auto aType = maybeGetAttr("type");
return aType && aType->getString() == "derivation";
}
StorePath AttrCursor::forceDerivation()
{
auto aDrvPath = getAttr(root->state.sDrvPath);
auto drvPath = root->state.store->parseStorePath(aDrvPath->getString());
if (!root->state.store->isValidPath(drvPath) && !settings.readOnlyMode) {
/* The eval cache contains 'drvPath', but the actual path has
been garbage-collected. So force it to be regenerated. */
aDrvPath->forceValue();
if (!root->state.store->isValidPath(drvPath))
throw Error("don't know how to recreate store derivation '%s'!",
root->state.store->printStorePath(drvPath));
}
return drvPath;
}
}

121
src/libexpr/eval-cache.hh Normal file
View file

@ -0,0 +1,121 @@
#pragma once
#include "sync.hh"
#include "hash.hh"
#include "eval.hh"
#include <functional>
#include <variant>
namespace nix::eval_cache {
class AttrDb;
class AttrCursor;
class EvalCache : public std::enable_shared_from_this<EvalCache>
{
friend class AttrCursor;
std::shared_ptr<AttrDb> db;
EvalState & state;
typedef std::function<Value *()> RootLoader;
RootLoader rootLoader;
RootValue value;
Value * getRootValue();
public:
EvalCache(
std::optional<std::reference_wrapper<const Hash>> useCache,
EvalState & state,
RootLoader rootLoader);
std::shared_ptr<AttrCursor> getRoot();
};
enum AttrType {
Placeholder = 0,
FullAttrs = 1,
String = 2,
Missing = 3,
Misc = 4,
Failed = 5,
Bool = 6,
};
struct placeholder_t {};
struct missing_t {};
struct misc_t {};
struct failed_t {};
typedef uint64_t AttrId;
typedef std::pair<AttrId, Symbol> AttrKey;
typedef std::pair<std::string, std::vector<std::pair<Path, std::string>>> string_t;
typedef std::variant<
std::vector<Symbol>,
string_t,
placeholder_t,
missing_t,
misc_t,
failed_t,
bool
> AttrValue;
class AttrCursor : public std::enable_shared_from_this<AttrCursor>
{
friend class EvalCache;
ref<EvalCache> root;
typedef std::optional<std::pair<std::shared_ptr<AttrCursor>, Symbol>> Parent;
Parent parent;
RootValue _value;
std::optional<std::pair<AttrId, AttrValue>> cachedValue;
AttrKey getKey();
Value & getValue();
public:
AttrCursor(
ref<EvalCache> root,
Parent parent,
Value * value = nullptr,
std::optional<std::pair<AttrId, AttrValue>> && cachedValue = {});
std::vector<Symbol> getAttrPath() const;
std::vector<Symbol> getAttrPath(Symbol name) const;
std::string getAttrPathStr() const;
std::string getAttrPathStr(Symbol name) const;
std::shared_ptr<AttrCursor> maybeGetAttr(Symbol name);
std::shared_ptr<AttrCursor> maybeGetAttr(std::string_view name);
std::shared_ptr<AttrCursor> getAttr(Symbol name);
std::shared_ptr<AttrCursor> getAttr(std::string_view name);
std::shared_ptr<AttrCursor> findAlongAttrPath(const std::vector<Symbol> & attrPath);
std::string getString();
string_t getStringWithContext();
bool getBool();
std::vector<Symbol> getAttrs();
bool isDerivation();
Value & forceValue();
/* Force creation of the .drv file in the Nix store. */
StorePath forceDerivation();
};
}

45
src/libexpr/eval.cc
View file

@ -199,6 +199,18 @@ string showType(const Value & v)
}
bool Value::isTrivial() const
{
return
type != tApp
&& type != tPrimOpApp
&& (type != tThunk
|| (dynamic_cast<ExprAttrs *>(thunk.expr)
&& ((ExprAttrs *) thunk.expr)->dynamicAttrs.empty())
|| dynamic_cast<ExprLambda *>(thunk.expr));
}
#if HAVE_BOEHMGC
/* Called when the Boehm GC runs out of memory. */
static void * oomHandler(size_t requested)
@ -337,6 +349,9 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
, sOutputHashAlgo(symbols.create("outputHashAlgo"))
, sOutputHashMode(symbols.create("outputHashMode"))
, sRecurseForDerivations(symbols.create("recurseForDerivations"))
, sDescription(symbols.create("description"))
, sSelf(symbols.create("self"))
, sEpsilon(symbols.create(""))
, repair(NoRepair)
, store(store)
, baseEnv(allocEnv(128))
@ -782,7 +797,7 @@ Value * ExprPath::maybeThunk(EvalState & state, Env & env)
}
void EvalState::evalFile(const Path & path_, Value & v)
void EvalState::evalFile(const Path & path_, Value & v, bool mustBeTrivial)
{
auto path = checkSourcePath(path_);
@ -811,6 +826,11 @@ void EvalState::evalFile(const Path & path_, Value & v)
fileParseCache[path2] = e;
try {
// Enforce that 'flake.nix' is a direct attrset, not a
// computation.
if (mustBeTrivial &&
!(dynamic_cast<ExprAttrs *>(e)))
throw Error("file '%s' must be an attribute set", path);
eval(e, v);
} catch (Error & e) {
addErrorTrace(e, "while evaluating the file '%1%':", path2);
@ -1586,6 +1606,18 @@ string EvalState::forceString(Value & v, const Pos & pos)
}
/* Decode a context string ‘!<name>!<path>’ into a pair <path,
name>. */
std::pair<string, string> decodeContext(std::string_view s)
{
if (s.at(0) == '!') {
size_t index = s.find("!", 1);
return {std::string(s.substr(index + 1)), std::string(s.substr(1, index - 1))};
} else
return {s.at(0) == '/' ? std::string(s) : std::string(s.substr(1)), ""};
}
void copyContext(const Value & v, PathSet & context)
{
if (v.string.context)
@ -1594,6 +1626,17 @@ void copyContext(const Value & v, PathSet & context)
}
std::vector<std::pair<Path, std::string>> Value::getContext()
{
std::vector<std::pair<Path, std::string>> res;
assert(type == tString);
if (string.context)
for (const char * * p = string.context; *p; ++p)
res.push_back(decodeContext(*p));
return res;
}
string EvalState::forceString(Value & v, PathSet & context, const Pos & pos)
{
string s = forceString(v, pos);

13
src/libexpr/eval.hh
View file

@ -4,13 +4,13 @@
#include "value.hh"
#include "nixexpr.hh"
#include "symbol-table.hh"
#include "hash.hh"
#include "config.hh"
#include <regex>
#include <map>
#include <optional>
#include <unordered_map>
#include <mutex>
namespace nix {
@ -75,7 +75,8 @@ public:
sFile, sLine, sColumn, sFunctor, sToString,
sRight, sWrong, sStructuredAttrs, sBuilder, sArgs,
sOutputHash, sOutputHashAlgo, sOutputHashMode,
sRecurseForDerivations;
sRecurseForDerivations,
sDescription, sSelf, sEpsilon;
Symbol sDerivationNix;
/* If set, force copying files to the Nix store even if they
@ -90,6 +91,7 @@ public:
const ref<Store> store;
private:
SrcToStore srcToStore;
@ -152,8 +154,9 @@ public:
Expr * parseStdin();
/* Evaluate an expression read from the given file to normal
form. */
void evalFile(const Path & path, Value & v);
form. Optionally enforce that the top-level expression is
trivial (i.e. doesn't require arbitrary computation). */
void evalFile(const Path & path, Value & v, bool mustBeTrivial = false);
void resetFileCache();
@ -330,7 +333,7 @@ string showType(const Value & v);
/* Decode a context string ‘!<name>!<path>’ into a pair <path,
name>. */
std::pair<string, string> decodeContext(const string & s);
std::pair<string, string> decodeContext(std::string_view s);
/* If `path' refers to a directory, then append "/default.nix". */
Path resolveExprPath(Path path);

56
src/libexpr/flake/call-flake.nix Normal file
View file

@ -0,0 +1,56 @@
lockFileStr: rootSrc: rootSubdir:
let
lockFile = builtins.fromJSON lockFileStr;
allNodes =
builtins.mapAttrs
(key: node:
let
sourceInfo =
if key == lockFile.root
then rootSrc
else fetchTree (node.info or {} // removeAttrs node.locked ["dir"]);
subdir = if key == lockFile.root then rootSubdir else node.locked.dir or "";
flake = import (sourceInfo + (if subdir != "" then "/" else "") + subdir + "/flake.nix");
inputs = builtins.mapAttrs
(inputName: inputSpec: allNodes.${resolveInput inputSpec})
(node.inputs or {});
# Resolve a input spec into a node name. An input spec is
# either a node name, or a 'follows' path from the root
# node.
resolveInput = inputSpec:
if builtins.isList inputSpec
then getInputByPath lockFile.root inputSpec
else inputSpec;
# Follow an input path (e.g. ["dwarffs" "nixpkgs"]) from the
# root node, returning the final node.
getInputByPath = nodeName: path:
if path == []
then nodeName
else
getInputByPath
# Since this could be a 'follows' input, call resolveInput.
(resolveInput lockFile.nodes.${nodeName}.inputs.${builtins.head path})
(builtins.tail path);
outputs = flake.outputs (inputs // { self = result; });
result = outputs // sourceInfo // { inherit inputs; inherit outputs; inherit sourceInfo; };
in
if node.flake or true then
assert builtins.isFunction flake.outputs;
result
else
sourceInfo
)
lockFile.nodes;
in allNodes.${lockFile.root}

609
src/libexpr/flake/flake.cc Normal file
View file

@ -0,0 +1,609 @@
#include "flake.hh"
#include "lockfile.hh"
#include "primops.hh"
#include "eval-inline.hh"
#include "store-api.hh"
#include "fetchers.hh"
#include "finally.hh"
namespace nix {
using namespace flake;
namespace flake {
typedef std::pair<Tree, FlakeRef> FetchedFlake;
typedef std::vector<std::pair<FlakeRef, FetchedFlake>> FlakeCache;
static std::optional<FetchedFlake> lookupInFlakeCache(
const FlakeCache & flakeCache,
const FlakeRef & flakeRef)
{
// FIXME: inefficient.
for (auto & i : flakeCache) {
if (flakeRef == i.first) {
debug("mapping '%s' to previously seen input '%s' -> '%s",
flakeRef, i.first, i.second.second);
return i.second;
}
}
return std::nullopt;
}
static std::tuple<fetchers::Tree, FlakeRef, FlakeRef> fetchOrSubstituteTree(
EvalState & state,
const FlakeRef & originalRef,
bool allowLookup,
FlakeCache & flakeCache)
{
auto fetched = lookupInFlakeCache(flakeCache, originalRef);
FlakeRef resolvedRef = originalRef;
if (!fetched) {
if (originalRef.input.isDirect()) {
fetched.emplace(originalRef.fetchTree(state.store));
} else {
if (allowLookup) {
resolvedRef = originalRef.resolve(state.store);
auto fetchedResolved = lookupInFlakeCache(flakeCache, originalRef);
if (!fetchedResolved) fetchedResolved.emplace(resolvedRef.fetchTree(state.store));
flakeCache.push_back({resolvedRef, fetchedResolved.value()});
fetched.emplace(fetchedResolved.value());
}
else {
throw Error("'%s' is an indirect flake reference, but registry lookups are not allowed", originalRef);
}
}
flakeCache.push_back({originalRef, fetched.value()});
}
auto [tree, lockedRef] = fetched.value();
debug("got tree '%s' from '%s'",
state.store->printStorePath(tree.storePath), lockedRef);
if (state.allowedPaths)
state.allowedPaths->insert(tree.actualPath);
assert(!originalRef.input.getNarHash() || tree.storePath == originalRef.input.computeStorePath(*state.store));
return {std::move(tree), resolvedRef, lockedRef};
}
static void expectType(EvalState & state, ValueType type,
Value & value, const Pos & pos)
{
if (value.type == tThunk && value.isTrivial())
state.forceValue(value, pos);
if (value.type != type)
throw Error("expected %s but got %s at %s",
showType(type), showType(value.type), pos);
}
static std::map<FlakeId, FlakeInput> parseFlakeInputs(
EvalState & state, Value * value, const Pos & pos);
static FlakeInput parseFlakeInput(EvalState & state,
const std::string & inputName, Value * value, const Pos & pos)
{
expectType(state, tAttrs, *value, pos);
FlakeInput input;
auto sInputs = state.symbols.create("inputs");
auto sUrl = state.symbols.create("url");
auto sFlake = state.symbols.create("flake");
auto sFollows = state.symbols.create("follows");
fetchers::Attrs attrs;
std::optional<std::string> url;
for (nix::Attr attr : *(value->attrs)) {
try {
if (attr.name == sUrl) {
expectType(state, tString, *attr.value, *attr.pos);
url = attr.value->string.s;
attrs.emplace("url", *url);
} else if (attr.name == sFlake) {
expectType(state, tBool, *attr.value, *attr.pos);
input.isFlake = attr.value->boolean;
} else if (attr.name == sInputs) {
input.overrides = parseFlakeInputs(state, attr.value, *attr.pos);
} else if (attr.name == sFollows) {
expectType(state, tString, *attr.value, *attr.pos);
input.follows = parseInputPath(attr.value->string.s);
} else {
state.forceValue(*attr.value);
if (attr.value->type == tString)
attrs.emplace(attr.name, attr.value->string.s);
else
throw TypeError("flake input attribute '%s' is %s while a string is expected",
attr.name, showType(*attr.value));
}
} catch (Error & e) {
e.addTrace(*attr.pos, hintfmt("in flake attribute '%s'", attr.name));
throw;
}
}
if (attrs.count("type"))
try {
input.ref = FlakeRef::fromAttrs(attrs);
} catch (Error & e) {
e.addTrace(pos, hintfmt("in flake input"));
throw;
}
else {
attrs.erase("url");
if (!attrs.empty())
throw Error("unexpected flake input attribute '%s', at %s", attrs.begin()->first, pos);
if (url)
input.ref = parseFlakeRef(*url, {}, true);
}
if (!input.follows && !input.ref)
input.ref = FlakeRef::fromAttrs({{"type", "indirect"}, {"id", inputName}});
return input;
}
static std::map<FlakeId, FlakeInput> parseFlakeInputs(
EvalState & state, Value * value, const Pos & pos)
{
std::map<FlakeId, FlakeInput> inputs;
expectType(state, tAttrs, *value, pos);
for (nix::Attr & inputAttr : *(*value).attrs) {
inputs.emplace(inputAttr.name,
parseFlakeInput(state,
inputAttr.name,
inputAttr.value,
*inputAttr.pos));
}
return inputs;
}
static Flake getFlake(
EvalState & state,
const FlakeRef & originalRef,
bool allowLookup,
FlakeCache & flakeCache)
{
auto [sourceInfo, resolvedRef, lockedRef] = fetchOrSubstituteTree(
state, originalRef, allowLookup, flakeCache);
// Guard against symlink attacks.
auto flakeFile = canonPath(sourceInfo.actualPath + "/" + lockedRef.subdir + "/flake.nix");
if (!isInDir(flakeFile, sourceInfo.actualPath))
throw Error("'flake.nix' file of flake '%s' escapes from '%s'",
lockedRef, state.store->printStorePath(sourceInfo.storePath));
Flake flake {
.originalRef = originalRef,
.resolvedRef = resolvedRef,
.lockedRef = lockedRef,
.sourceInfo = std::make_shared<fetchers::Tree>(std::move(sourceInfo))
};
if (!pathExists(flakeFile))
throw Error("source tree referenced by '%s' does not contain a '%s/flake.nix' file", lockedRef, lockedRef.subdir);
Value vInfo;
state.evalFile(flakeFile, vInfo, true); // FIXME: symlink attack
expectType(state, tAttrs, vInfo, Pos(foFile, state.symbols.create(flakeFile), 0, 0));
auto sEdition = state.symbols.create("edition"); // FIXME: remove soon
if (vInfo.attrs->get(sEdition))
warn("flake '%s' has deprecated attribute 'edition'", lockedRef);
if (auto description = vInfo.attrs->get(state.sDescription)) {
expectType(state, tString, *description->value, *description->pos);
flake.description = description->value->string.s;
}
auto sInputs = state.symbols.create("inputs");
if (auto inputs = vInfo.attrs->get(sInputs))
flake.inputs = parseFlakeInputs(state, inputs->value, *inputs->pos);
auto sOutputs = state.symbols.create("outputs");
if (auto outputs = vInfo.attrs->get(sOutputs)) {
expectType(state, tLambda, *outputs->value, *outputs->pos);
flake.vOutputs = allocRootValue(outputs->value);
if ((*flake.vOutputs)->lambda.fun->matchAttrs) {
for (auto & formal : (*flake.vOutputs)->lambda.fun->formals->formals) {
if (formal.name != state.sSelf)
flake.inputs.emplace(formal.name, FlakeInput {
.ref = parseFlakeRef(formal.name)
});
}
}
} else
throw Error("flake '%s' lacks attribute 'outputs'", lockedRef);
for (auto & attr : *vInfo.attrs) {
if (attr.name != sEdition &&
attr.name != state.sDescription &&
attr.name != sInputs &&
attr.name != sOutputs)
throw Error("flake '%s' has an unsupported attribute '%s', at %s",
lockedRef, attr.name, *attr.pos);
}
return flake;
}
Flake getFlake(EvalState & state, const FlakeRef & originalRef, bool allowLookup)
{
FlakeCache flakeCache;
return getFlake(state, originalRef, allowLookup, flakeCache);
}
/* Compute an in-memory lock file for the specified top-level flake,
and optionally write it to file, it the flake is writable. */
LockedFlake lockFlake(
EvalState & state,
const FlakeRef & topRef,
const LockFlags & lockFlags)
{
settings.requireExperimentalFeature("flakes");
FlakeCache flakeCache;
auto flake = getFlake(state, topRef, lockFlags.useRegistries, flakeCache);
// FIXME: symlink attack
auto oldLockFile = LockFile::read(
flake.sourceInfo->actualPath + "/" + flake.lockedRef.subdir + "/flake.lock");
debug("old lock file: %s", oldLockFile);
// FIXME: check whether all overrides are used.
std::map<InputPath, FlakeInput> overrides;
std::set<InputPath> overridesUsed, updatesUsed;
for (auto & i : lockFlags.inputOverrides)
overrides.insert_or_assign(i.first, FlakeInput { .ref = i.second });
LockFile newLockFile;
std::vector<FlakeRef> parents;
std::function<void(
const FlakeInputs & flakeInputs,
std::shared_ptr<Node> node,
const InputPath & inputPathPrefix,
std::shared_ptr<const Node> oldNode)>
computeLocks;
computeLocks = [&](
const FlakeInputs & flakeInputs,
std::shared_ptr<Node> node,
const InputPath & inputPathPrefix,
std::shared_ptr<const Node> oldNode)
{
debug("computing lock file node '%s'", printInputPath(inputPathPrefix));
/* Get the overrides (i.e. attributes of the form
'inputs.nixops.inputs.nixpkgs.url = ...'). */
// FIXME: check this
for (auto & [id, input] : flake.inputs) {
for (auto & [idOverride, inputOverride] : input.overrides) {
auto inputPath(inputPathPrefix);
inputPath.push_back(id);
inputPath.push_back(idOverride);
overrides.insert_or_assign(inputPath, inputOverride);
}
}
/* Go over the flake inputs, resolve/fetch them if
necessary (i.e. if they're new or the flakeref changed
from what's in the lock file). */
for (auto & [id, input2] : flakeInputs) {
auto inputPath(inputPathPrefix);
inputPath.push_back(id);
auto inputPathS = printInputPath(inputPath);
debug("computing input '%s'", inputPathS);
/* Do we have an override for this input from one of the
ancestors? */
auto i = overrides.find(inputPath);
bool hasOverride = i != overrides.end();
if (hasOverride) overridesUsed.insert(inputPath);
auto & input = hasOverride ? i->second : input2;
/* Resolve 'follows' later (since it may refer to an input
path we haven't processed yet. */
if (input.follows) {
InputPath target;
if (hasOverride || input.absolute)
/* 'follows' from an override is relative to the
root of the graph. */
target = *input.follows;
else {
/* Otherwise, it's relative to the current flake. */
target = inputPathPrefix;
for (auto & i : *input.follows) target.push_back(i);
}
debug("input '%s' follows '%s'", inputPathS, printInputPath(target));
node->inputs.insert_or_assign(id, target);
continue;
}
assert(input.ref);
/* Do we have an entry in the existing lock file? And we
don't have a --update-input flag for this input? */
std::shared_ptr<LockedNode> oldLock;
updatesUsed.insert(inputPath);
if (oldNode && !lockFlags.inputUpdates.count(inputPath))
if (auto oldLock2 = get(oldNode->inputs, id))
if (auto oldLock3 = std::get_if<0>(&*oldLock2))
oldLock = *oldLock3;
if (oldLock
&& oldLock->originalRef == *input.ref
&& !hasOverride)
{
debug("keeping existing input '%s'", inputPathS);
/* Copy the input from the old lock since its flakeref
didn't change and there is no override from a
higher level flake. */
auto childNode = std::make_shared<LockedNode>(
oldLock->lockedRef, oldLock->originalRef, oldLock->isFlake);
node->inputs.insert_or_assign(id, childNode);
/* If we have an --update-input flag for an input
of this input, then we must fetch the flake to
to update it. */
auto lb = lockFlags.inputUpdates.lower_bound(inputPath);
auto hasChildUpdate =
lb != lockFlags.inputUpdates.end()
&& lb->size() > inputPath.size()
&& std::equal(inputPath.begin(), inputPath.end(), lb->begin());
if (hasChildUpdate) {
auto inputFlake = getFlake(
state, oldLock->lockedRef, false, flakeCache);
computeLocks(inputFlake.inputs, childNode, inputPath, oldLock);
} else {
/* No need to fetch this flake, we can be
lazy. However there may be new overrides on the
inputs of this flake, so we need to check
those. */
FlakeInputs fakeInputs;
for (auto & i : oldLock->inputs) {
if (auto lockedNode = std::get_if<0>(&i.second)) {
fakeInputs.emplace(i.first, FlakeInput {
.ref = (*lockedNode)->originalRef,
.isFlake = (*lockedNode)->isFlake,
});
} else if (auto follows = std::get_if<1>(&i.second)) {
fakeInputs.emplace(i.first, FlakeInput {
.follows = *follows,
.absolute = true
});
}
}
computeLocks(fakeInputs, childNode, inputPath, oldLock);
}
} else {
/* We need to create a new lock file entry. So fetch
this input. */
debug("creating new input '%s'", inputPathS);
if (!lockFlags.allowMutable && !input.ref->input.isImmutable())
throw Error("cannot update flake input '%s' in pure mode", inputPathS);
if (input.isFlake) {
auto inputFlake = getFlake(state, *input.ref, lockFlags.useRegistries, flakeCache);
/* Note: in case of an --override-input, we use
the *original* ref (input2.ref) for the
"original" field, rather than the
override. This ensures that the override isn't
nuked the next time we update the lock
file. That is, overrides are sticky unless you
use --no-write-lock-file. */
auto childNode = std::make_shared<LockedNode>(
inputFlake.lockedRef, input2.ref ? *input2.ref : *input.ref);
node->inputs.insert_or_assign(id, childNode);
/* Guard against circular flake imports. */
for (auto & parent : parents)
if (parent == *input.ref)
throw Error("found circular import of flake '%s'", parent);
parents.push_back(*input.ref);
Finally cleanup([&]() { parents.pop_back(); });
/* Recursively process the inputs of this
flake. Also, unless we already have this flake
in the top-level lock file, use this flake's
own lock file. */
computeLocks(
inputFlake.inputs, childNode, inputPath,
oldLock
? std::dynamic_pointer_cast<const Node>(oldLock)
: LockFile::read(
inputFlake.sourceInfo->actualPath + "/" + inputFlake.lockedRef.subdir + "/flake.lock").root);
}
else {
auto [sourceInfo, resolvedRef, lockedRef] = fetchOrSubstituteTree(
state, *input.ref, lockFlags.useRegistries, flakeCache);
node->inputs.insert_or_assign(id,
std::make_shared<LockedNode>(lockedRef, *input.ref, false));
}
}
}
};
computeLocks(
flake.inputs, newLockFile.root, {},
lockFlags.recreateLockFile ? nullptr : oldLockFile.root);
for (auto & i : lockFlags.inputOverrides)
if (!overridesUsed.count(i.first))
warn("the flag '--override-input %s %s' does not match any input",
printInputPath(i.first), i.second);
for (auto & i : lockFlags.inputUpdates)
if (!updatesUsed.count(i))
warn("the flag '--update-input %s' does not match any input", printInputPath(i));
/* Check 'follows' inputs. */
newLockFile.check();
debug("new lock file: %s", newLockFile);
/* Check whether we need to / can write the new lock file. */
if (!(newLockFile == oldLockFile)) {
auto diff = LockFile::diff(oldLockFile, newLockFile);
if (lockFlags.writeLockFile) {
if (auto sourcePath = topRef.input.getSourcePath()) {
if (!newLockFile.isImmutable()) {
if (settings.warnDirty)
warn("will not write lock file of flake '%s' because it has a mutable input", topRef);
} else {
if (!lockFlags.updateLockFile)
throw Error("flake '%s' requires lock file changes but they're not allowed due to '--no-update-lock-file'", topRef);
auto relPath = (topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock";
auto path = *sourcePath + "/" + relPath;
bool lockFileExists = pathExists(path);
if (lockFileExists) {
auto s = chomp(diff);
if (s.empty())
warn("updating lock file '%s'", path);
else
warn("updating lock file '%s':\n%s", path, s);
} else
warn("creating lock file '%s'", path);
newLockFile.write(path);
topRef.input.markChangedFile(
(topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock",
lockFlags.commitLockFile
? std::optional<std::string>(fmt("%s: %s\n\nFlake input changes:\n\n%s",
relPath, lockFileExists ? "Update" : "Add", diff))
: std::nullopt);
/* Rewriting the lockfile changed the top-level
repo, so we should re-read it. FIXME: we could
also just clear the 'rev' field... */
auto prevLockedRef = flake.lockedRef;
FlakeCache dummyCache;
flake = getFlake(state, topRef, lockFlags.useRegistries, dummyCache);
if (lockFlags.commitLockFile &&
flake.lockedRef.input.getRev() &&
prevLockedRef.input.getRev() != flake.lockedRef.input.getRev())
warn("committed new revision '%s'", flake.lockedRef.input.getRev()->gitRev());
/* Make sure that we picked up the change,
i.e. the tree should usually be dirty
now. Corner case: we could have reverted from a
dirty to a clean tree! */
if (flake.lockedRef.input == prevLockedRef.input
&& !flake.lockedRef.input.isImmutable())
throw Error("'%s' did not change after I updated its 'flake.lock' file; is 'flake.lock' under version control?", flake.originalRef);
}
} else
throw Error("cannot write modified lock file of flake '%s' (use '--no-write-lock-file' to ignore)", topRef);
} else
warn("not writing modified lock file of flake '%s':\n%s", topRef, chomp(diff));
}
return LockedFlake { .flake = std::move(flake), .lockFile = std::move(newLockFile) };
}
void callFlake(EvalState & state,
const LockedFlake & lockedFlake,
Value & vRes)
{
auto vLocks = state.allocValue();
auto vRootSrc = state.allocValue();
auto vRootSubdir = state.allocValue();
auto vTmp1 = state.allocValue();
auto vTmp2 = state.allocValue();
mkString(*vLocks, lockedFlake.lockFile.to_string());
emitTreeAttrs(state, *lockedFlake.flake.sourceInfo, lockedFlake.flake.lockedRef.input, *vRootSrc);
mkString(*vRootSubdir, lockedFlake.flake.lockedRef.subdir);
static RootValue vCallFlake = nullptr;
if (!vCallFlake) {
vCallFlake = allocRootValue(state.allocValue());
state.eval(state.parseExprFromString(
#include "call-flake.nix.gen.hh"
, "/"), **vCallFlake);
}
state.callFunction(**vCallFlake, *vLocks, *vTmp1, noPos);
state.callFunction(*vTmp1, *vRootSrc, *vTmp2, noPos);
state.callFunction(*vTmp2, *vRootSubdir, vRes, noPos);
}
static void prim_getFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto flakeRefS = state.forceStringNoCtx(*args[0], pos);
auto flakeRef = parseFlakeRef(flakeRefS, {}, true);
if (evalSettings.pureEval && !flakeRef.input.isImmutable())
throw Error("cannot call 'getFlake' on mutable flake reference '%s', at %s (use --impure to override)", flakeRefS, pos);
callFlake(state,
lockFlake(state, flakeRef,
LockFlags {
.updateLockFile = false,
.useRegistries = !evalSettings.pureEval,
.allowMutable = !evalSettings.pureEval,
}),
v);
}
static RegisterPrimOp r2("__getFlake", 1, prim_getFlake, "flakes");
}
Fingerprint LockedFlake::getFingerprint() const
{
// FIXME: as an optimization, if the flake contains a lock file
// and we haven't changed it, then it's sufficient to use
// flake.sourceInfo.storePath for the fingerprint.
return hashString(htSHA256,
fmt("%s;%d;%d;%s",
flake.sourceInfo->storePath.to_string(),
flake.lockedRef.input.getRevCount().value_or(0),
flake.lockedRef.input.getLastModified().value_or(0),
lockFile));
}
Flake::~Flake() { }
}

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#pragma once
#include "types.hh"
#include "flakeref.hh"
#include "lockfile.hh"
#include "value.hh"
namespace nix {
class EvalState;
namespace fetchers { struct Tree; }
namespace flake {
struct FlakeInput;
typedef std::map<FlakeId, FlakeInput> FlakeInputs;
struct FlakeInput
{
std::optional<FlakeRef> ref;
bool isFlake = true;
std::optional<InputPath> follows;
bool absolute = false; // whether 'follows' is relative to the flake root
FlakeInputs overrides;
};
struct Flake
{
FlakeRef originalRef;
FlakeRef resolvedRef;
FlakeRef lockedRef;
std::optional<std::string> description;
std::shared_ptr<const fetchers::Tree> sourceInfo;
FlakeInputs inputs;
RootValue vOutputs;
~Flake();
};
Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool allowLookup);
/* Fingerprint of a locked flake; used as a cache key. */
typedef Hash Fingerprint;
struct LockedFlake
{
Flake flake;
LockFile lockFile;
Fingerprint getFingerprint() const;
};
struct LockFlags
{
/* Whether to ignore the existing lock file, creating a new one
from scratch. */
bool recreateLockFile = false;
/* Whether to update the lock file at all. If set to false, if any
change to the lock file is needed (e.g. when an input has been
added to flake.nix), you get a fatal error. */
bool updateLockFile = true;
/* Whether to write the lock file to disk. If set to true, if the
any changes to the lock file are needed and the flake is not
writable (i.e. is not a local Git working tree or similar), you
get a fatal error. If set to false, Nix will use the modified
lock file in memory only, without writing it to disk. */
bool writeLockFile = true;
/* Whether to use the registries to lookup indirect flake
references like 'nixpkgs'. */
bool useRegistries = true;
/* Whether mutable flake references (i.e. those without a Git
revision or similar) without a corresponding lock are
allowed. Mutable flake references with a lock are always
allowed. */
bool allowMutable = true;
/* Whether to commit changes to flake.lock. */
bool commitLockFile = false;
/* Flake inputs to be overriden. */
std::map<InputPath, FlakeRef> inputOverrides;
/* Flake inputs to be updated. This means that any existing lock
for those inputs will be ignored. */
std::set<InputPath> inputUpdates;
};
LockedFlake lockFlake(
EvalState & state,
const FlakeRef & flakeRef,
const LockFlags & lockFlags);
void callFlake(
EvalState & state,
const LockedFlake & lockedFlake,
Value & v);
}
void emitTreeAttrs(
EvalState & state,
const fetchers::Tree & tree,
const fetchers::Input & input,
Value & v, bool emptyRevFallback = false);
}

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#include "flakeref.hh"
#include "store-api.hh"
#include "url.hh"
#include "fetchers.hh"
#include "registry.hh"
namespace nix {
#if 0
// 'dir' path elements cannot start with a '.'. We also reject
// potentially dangerous characters like ';'.
const static std::string subDirElemRegex = "(?:[a-zA-Z0-9_-]+[a-zA-Z0-9._-]*)";
const static std::string subDirRegex = subDirElemRegex + "(?:/" + subDirElemRegex + ")*";
#endif
std::string FlakeRef::to_string() const
{
auto url = input.toURL();
if (subdir != "")
url.query.insert_or_assign("dir", subdir);
return url.to_string();
}
fetchers::Attrs FlakeRef::toAttrs() const
{
auto attrs = input.toAttrs();
if (subdir != "")
attrs.emplace("dir", subdir);
return attrs;
}
std::ostream & operator << (std::ostream & str, const FlakeRef & flakeRef)
{
str << flakeRef.to_string();
return str;
}
bool FlakeRef::operator ==(const FlakeRef & other) const
{
return input == other.input && subdir == other.subdir;
}
FlakeRef FlakeRef::resolve(ref<Store> store) const
{
auto [input2, extraAttrs] = lookupInRegistries(store, input);
return FlakeRef(std::move(input2), fetchers::maybeGetStrAttr(extraAttrs, "dir").value_or(subdir));
}
FlakeRef parseFlakeRef(
const std::string & url, const std::optional<Path> & baseDir, bool allowMissing)
{
auto [flakeRef, fragment] = parseFlakeRefWithFragment(url, baseDir, allowMissing);
if (fragment != "")
throw Error("unexpected fragment '%s' in flake reference '%s'", fragment, url);
return flakeRef;
}
std::optional<FlakeRef> maybeParseFlakeRef(
const std::string & url, const std::optional<Path> & baseDir)
{
try {
return parseFlakeRef(url, baseDir);
} catch (Error &) {
return {};
}
}
std::pair<FlakeRef, std::string> parseFlakeRefWithFragment(
const std::string & url, const std::optional<Path> & baseDir, bool allowMissing)
{
using namespace fetchers;
static std::string fnRegex = "[0-9a-zA-Z-._~!$&'\"()*+,;=]+";
static std::regex pathUrlRegex(
"(/?" + fnRegex + "(?:/" + fnRegex + ")*/?)"
+ "(?:\\?(" + queryRegex + "))?"
+ "(?:#(" + queryRegex + "))?",
std::regex::ECMAScript);
static std::regex flakeRegex(
"((" + flakeIdRegexS + ")(?:/(?:" + refAndOrRevRegex + "))?)"
+ "(?:#(" + queryRegex + "))?",
std::regex::ECMAScript);
std::smatch match;
/* Check if 'url' is a flake ID. This is an abbreviated syntax for
'flake:<flake-id>?ref=<ref>&rev=<rev>'. */
if (std::regex_match(url, match, flakeRegex)) {
auto parsedURL = ParsedURL{
.url = url,
.base = "flake:" + std::string(match[1]),
.scheme = "flake",
.authority = "",
.path = match[1],
};
return std::make_pair(
FlakeRef(Input::fromURL(parsedURL), ""),
percentDecode(std::string(match[6])));
}
else if (std::regex_match(url, match, pathUrlRegex)) {
std::string path = match[1];
std::string fragment = percentDecode(std::string(match[3]));
if (baseDir) {
/* Check if 'url' is a path (either absolute or relative
to 'baseDir'). If so, search upward to the root of the
repo (i.e. the directory containing .git). */
path = absPath(path, baseDir, true);
if (!S_ISDIR(lstat(path).st_mode))
throw BadURL("path '%s' is not a flake (because it's not a directory)", path);
if (!allowMissing && !pathExists(path + "/flake.nix"))
throw BadURL("path '%s' is not a flake (because it doesn't contain a 'flake.nix' file)", path);
auto flakeRoot = path;
std::string subdir;
while (flakeRoot != "/") {
if (pathExists(flakeRoot + "/.git")) {
auto base = std::string("git+file://") + flakeRoot;
auto parsedURL = ParsedURL{
.url = base, // FIXME
.base = base,
.scheme = "git+file",
.authority = "",
.path = flakeRoot,
.query = decodeQuery(match[2]),
};
if (subdir != "") {
if (parsedURL.query.count("dir"))
throw Error("flake URL '%s' has an inconsistent 'dir' parameter", url);
parsedURL.query.insert_or_assign("dir", subdir);
}
if (pathExists(flakeRoot + "/.git/shallow"))
parsedURL.query.insert_or_assign("shallow", "1");
return std::make_pair(
FlakeRef(Input::fromURL(parsedURL), get(parsedURL.query, "dir").value_or("")),
fragment);
}
subdir = std::string(baseNameOf(flakeRoot)) + (subdir.empty() ? "" : "/" + subdir);
flakeRoot = dirOf(flakeRoot);
}
} else {
if (!hasPrefix(path, "/"))
throw BadURL("flake reference '%s' is not an absolute path", url);
path = canonPath(path);
}
fetchers::Attrs attrs;
attrs.insert_or_assign("type", "path");
attrs.insert_or_assign("path", path);
return std::make_pair(FlakeRef(Input::fromAttrs(std::move(attrs)), ""), fragment);
}
else {
auto parsedURL = parseURL(url);
std::string fragment;
std::swap(fragment, parsedURL.fragment);
return std::make_pair(
FlakeRef(Input::fromURL(parsedURL), get(parsedURL.query, "dir").value_or("")),
fragment);
}
}
std::optional<std::pair<FlakeRef, std::string>> maybeParseFlakeRefWithFragment(
const std::string & url, const std::optional<Path> & baseDir)
{
try {
return parseFlakeRefWithFragment(url, baseDir);
} catch (Error & e) {
return {};
}
}
FlakeRef FlakeRef::fromAttrs(const fetchers::Attrs & attrs)
{
auto attrs2(attrs);
attrs2.erase("dir");
return FlakeRef(
fetchers::Input::fromAttrs(std::move(attrs2)),
fetchers::maybeGetStrAttr(attrs, "dir").value_or(""));
}
std::pair<fetchers::Tree, FlakeRef> FlakeRef::fetchTree(ref<Store> store) const
{
auto [tree, lockedInput] = input.fetch(store);
return {std::move(tree), FlakeRef(std::move(lockedInput), subdir)};
}
}

53
src/libexpr/flake/flakeref.hh Normal file
View file

@ -0,0 +1,53 @@
#pragma once
#include "types.hh"
#include "hash.hh"
#include "fetchers.hh"
#include <variant>
namespace nix {
class Store;
typedef std::string FlakeId;
struct FlakeRef
{
fetchers::Input input;
Path subdir;
bool operator==(const FlakeRef & other) const;
FlakeRef(fetchers::Input && input, const Path & subdir)
: input(std::move(input)), subdir(subdir)
{ }
// FIXME: change to operator <<.
std::string to_string() const;
fetchers::Attrs toAttrs() const;
FlakeRef resolve(ref<Store> store) const;
static FlakeRef fromAttrs(const fetchers::Attrs & attrs);
std::pair<fetchers::Tree, FlakeRef> fetchTree(ref<Store> store) const;
};
std::ostream & operator << (std::ostream & str, const FlakeRef & flakeRef);
FlakeRef parseFlakeRef(
const std::string & url, const std::optional<Path> & baseDir = {}, bool allowMissing = false);
std::optional<FlakeRef> maybeParseFlake(
const std::string & url, const std::optional<Path> & baseDir = {});
std::pair<FlakeRef, std::string> parseFlakeRefWithFragment(
const std::string & url, const std::optional<Path> & baseDir = {}, bool allowMissing = false);
std::optional<std::pair<FlakeRef, std::string>> maybeParseFlakeRefWithFragment(
const std::string & url, const std::optional<Path> & baseDir = {});
}

338
src/libexpr/flake/lockfile.cc Normal file
View file

@ -0,0 +1,338 @@
#include "lockfile.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
namespace nix::flake {
FlakeRef getFlakeRef(
const nlohmann::json & json,
const char * attr,
const char * info)
{
auto i = json.find(attr);
if (i != json.end()) {
auto attrs = jsonToAttrs(*i);
// FIXME: remove when we drop support for version 5.
if (info) {
auto j = json.find(info);
if (j != json.end()) {
for (auto k : jsonToAttrs(*j))
attrs.insert_or_assign(k.first, k.second);
}
}
return FlakeRef::fromAttrs(attrs);
}
throw Error("attribute '%s' missing in lock file", attr);
}
LockedNode::LockedNode(const nlohmann::json & json)
: lockedRef(getFlakeRef(json, "locked", "info"))
, originalRef(getFlakeRef(json, "original", nullptr))
, isFlake(json.find("flake") != json.end() ? (bool) json["flake"] : true)
{
if (!lockedRef.input.isImmutable())
throw Error("lockfile contains mutable lock '%s'", attrsToJson(lockedRef.input.toAttrs()));
}
StorePath LockedNode::computeStorePath(Store & store) const
{
return lockedRef.input.computeStorePath(store);
}
std::shared_ptr<Node> LockFile::findInput(const InputPath & path)
{
auto pos = root;
if (!pos) return {};
for (auto & elem : path) {
if (auto i = get(pos->inputs, elem)) {
if (auto node = std::get_if<0>(&*i))
pos = *node;
else if (auto follows = std::get_if<1>(&*i)) {
pos = findInput(*follows);
if (!pos) return {};
}
} else
return {};
}
return pos;
}
LockFile::LockFile(const nlohmann::json & json, const Path & path)
{
auto version = json.value("version", 0);
if (version < 5 || version > 7)
throw Error("lock file '%s' has unsupported version %d", path, version);
std::unordered_map<std::string, std::shared_ptr<Node>> nodeMap;
std::function<void(Node & node, const nlohmann::json & jsonNode)> getInputs;
getInputs = [&](Node & node, const nlohmann::json & jsonNode)
{
if (jsonNode.find("inputs") == jsonNode.end()) return;
for (auto & i : jsonNode["inputs"].items()) {
if (i.value().is_array()) {
InputPath path;
for (auto & j : i.value())
path.push_back(j);
node.inputs.insert_or_assign(i.key(), path);
} else {
std::string inputKey = i.value();
auto k = nodeMap.find(inputKey);
if (k == nodeMap.end()) {
auto jsonNode2 = json["nodes"][inputKey];
auto input = std::make_shared<LockedNode>(jsonNode2);
k = nodeMap.insert_or_assign(inputKey, input).first;
getInputs(*input, jsonNode2);
}
if (auto child = std::dynamic_pointer_cast<LockedNode>(k->second))
node.inputs.insert_or_assign(i.key(), child);
else
// FIXME: replace by follows node
throw Error("lock file contains cycle to root node");
}
}
};
std::string rootKey = json["root"];
nodeMap.insert_or_assign(rootKey, root);
getInputs(*root, json["nodes"][rootKey]);
// FIXME: check that there are no cycles in version >= 7. Cycles
// between inputs are only possible using 'follows' indirections.
// Once we drop support for version <= 6, we can simplify the code
// a bit since we don't need to worry about cycles.
}
nlohmann::json LockFile::toJson() const
{
nlohmann::json nodes;
std::unordered_map<std::shared_ptr<const Node>, std::string> nodeKeys;
std::unordered_set<std::string> keys;
std::function<std::string(const std::string & key, std::shared_ptr<const Node> node)> dumpNode;
dumpNode = [&](std::string key, std::shared_ptr<const Node> node) -> std::string
{
auto k = nodeKeys.find(node);
if (k != nodeKeys.end())
return k->second;
if (!keys.insert(key).second) {
for (int n = 2; ; ++n) {
auto k = fmt("%s_%d", key, n);
if (keys.insert(k).second) {
key = k;
break;
}
}
}
nodeKeys.insert_or_assign(node, key);
auto n = nlohmann::json::object();
if (!node->inputs.empty()) {
auto inputs = nlohmann::json::object();
for (auto & i : node->inputs) {
if (auto child = std::get_if<0>(&i.second)) {
inputs[i.first] = dumpNode(i.first, *child);
} else if (auto follows = std::get_if<1>(&i.second)) {
auto arr = nlohmann::json::array();
for (auto & x : *follows)
arr.push_back(x);
inputs[i.first] = std::move(arr);
}
}
n["inputs"] = std::move(inputs);
}
if (auto lockedNode = std::dynamic_pointer_cast<const LockedNode>(node)) {
n["original"] = fetchers::attrsToJson(lockedNode->originalRef.toAttrs());
n["locked"] = fetchers::attrsToJson(lockedNode->lockedRef.toAttrs());
if (!lockedNode->isFlake) n["flake"] = false;
}
nodes[key] = std::move(n);
return key;
};
nlohmann::json json;
json["version"] = 7;
json["root"] = dumpNode("root", root);
json["nodes"] = std::move(nodes);
return json;
}
std::string LockFile::to_string() const
{
return toJson().dump(2);
}
LockFile LockFile::read(const Path & path)
{
if (!pathExists(path)) return LockFile();
return LockFile(nlohmann::json::parse(readFile(path)), path);
}
std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile)
{
stream << lockFile.toJson().dump(2);
return stream;
}
void LockFile::write(const Path & path) const
{
createDirs(dirOf(path));
writeFile(path, fmt("%s\n", *this));
}
bool LockFile::isImmutable() const
{
std::unordered_set<std::shared_ptr<const Node>> nodes;
std::function<void(std::shared_ptr<const Node> node)> visit;
visit = [&](std::shared_ptr<const Node> node)
{
if (!nodes.insert(node).second) return;
for (auto & i : node->inputs)
if (auto child = std::get_if<0>(&i.second))
visit(*child);
};
visit(root);
for (auto & i : nodes) {
if (i == root) continue;
auto lockedNode = std::dynamic_pointer_cast<const LockedNode>(i);
if (lockedNode && !lockedNode->lockedRef.input.isImmutable()) return false;
}
return true;
}
bool LockFile::operator ==(const LockFile & other) const
{
// FIXME: slow
return toJson() == other.toJson();
}
InputPath parseInputPath(std::string_view s)
{
InputPath path;
for (auto & elem : tokenizeString<std::vector<std::string>>(s, "/")) {
if (!std::regex_match(elem, flakeIdRegex))
throw UsageError("invalid flake input path element '%s'", elem);
path.push_back(elem);
}
return path;
}
std::map<InputPath, Node::Edge> LockFile::getAllInputs() const
{
std::unordered_set<std::shared_ptr<Node>> done;
std::map<InputPath, Node::Edge> res;
std::function<void(const InputPath & prefix, std::shared_ptr<Node> node)> recurse;
recurse = [&](const InputPath & prefix, std::shared_ptr<Node> node)
{
if (!done.insert(node).second) return;
for (auto &[id, input] : node->inputs) {
auto inputPath(prefix);
inputPath.push_back(id);
res.emplace(inputPath, input);
if (auto child = std::get_if<0>(&input))
recurse(inputPath, *child);
}
};
recurse({}, root);
return res;
}
std::ostream & operator <<(std::ostream & stream, const Node::Edge & edge)
{
if (auto node = std::get_if<0>(&edge))
stream << "'" << (*node)->lockedRef << "'";
else if (auto follows = std::get_if<1>(&edge))
stream << fmt("follows '%s'", printInputPath(*follows));
return stream;
}
static bool equals(const Node::Edge & e1, const Node::Edge & e2)
{
if (auto n1 = std::get_if<0>(&e1))
if (auto n2 = std::get_if<0>(&e2))
return (*n1)->lockedRef == (*n2)->lockedRef;
if (auto f1 = std::get_if<1>(&e1))
if (auto f2 = std::get_if<1>(&e2))
return *f1 == *f2;
return false;
}
std::string LockFile::diff(const LockFile & oldLocks, const LockFile & newLocks)
{
auto oldFlat = oldLocks.getAllInputs();
auto newFlat = newLocks.getAllInputs();
auto i = oldFlat.begin();
auto j = newFlat.begin();
std::string res;
while (i != oldFlat.end() || j != newFlat.end()) {
if (j != newFlat.end() && (i == oldFlat.end() || i->first > j->first)) {
res += fmt("* Added '%s': %s\n", printInputPath(j->first), j->second);
++j;
} else if (i != oldFlat.end() && (j == newFlat.end() || i->first < j->first)) {
res += fmt("* Removed '%s'\n", printInputPath(i->first));
++i;
} else {
if (!equals(i->second, j->second)) {
res += fmt("* Updated '%s': %s -> %s\n",
printInputPath(i->first),
i->second,
j->second);
}
++i;
++j;
}
}
return res;
}
void LockFile::check()
{
auto inputs = getAllInputs();
for (auto & [inputPath, input] : inputs) {
if (auto follows = std::get_if<1>(&input)) {
if (!follows->empty() && !get(inputs, *follows))
throw Error("input '%s' follows a non-existent input '%s'",
printInputPath(inputPath),
printInputPath(*follows));
}
}
}
void check();
std::string printInputPath(const InputPath & path)
{
return concatStringsSep("/", path);
}
}

85
src/libexpr/flake/lockfile.hh Normal file
View file

@ -0,0 +1,85 @@
#pragma once
#include "flakeref.hh"
#include <nlohmann/json_fwd.hpp>
namespace nix {
class Store;
struct StorePath;
}
namespace nix::flake {
using namespace fetchers;
typedef std::vector<FlakeId> InputPath;
struct LockedNode;
/* A node in the lock file. It has outgoing edges to other nodes (its
inputs). Only the root node has this type; all other nodes have
type LockedNode. */
struct Node : std::enable_shared_from_this<Node>
{
typedef std::variant<std::shared_ptr<LockedNode>, InputPath> Edge;
std::map<FlakeId, Edge> inputs;
virtual ~Node() { }
};
/* A non-root node in the lock file. */
struct LockedNode : Node
{
FlakeRef lockedRef, originalRef;
bool isFlake = true;
LockedNode(
const FlakeRef & lockedRef,
const FlakeRef & originalRef,
bool isFlake = true)
: lockedRef(lockedRef), originalRef(originalRef), isFlake(isFlake)
{ }
LockedNode(const nlohmann::json & json);
StorePath computeStorePath(Store & store) const;
};
struct LockFile
{
std::shared_ptr<Node> root = std::make_shared<Node>();
LockFile() {};
LockFile(const nlohmann::json & json, const Path & path);
nlohmann::json toJson() const;
std::string to_string() const;
static LockFile read(const Path & path);
void write(const Path & path) const;
bool isImmutable() const;
bool operator ==(const LockFile & other) const;
std::shared_ptr<Node> findInput(const InputPath & path);
std::map<InputPath, Node::Edge> getAllInputs() const;
static std::string diff(const LockFile & oldLocks, const LockFile & newLocks);
/* Check that every 'follows' input target exists. */
void check();
};
std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile);
InputPath parseInputPath(std::string_view s);
std::string printInputPath(const InputPath & path);
}

2
src/libexpr/get-drvs.cc
View file

@ -39,7 +39,7 @@ DrvInfo::DrvInfo(EvalState & state, ref<Store> store, const std::string & drvPat
if (i == drv.outputs.end())
throw Error("derivation '%s' does not have output '%s'", store->printStorePath(drvPath), outputName);
outPath = store->printStorePath(i->second.path);
outPath = store->printStorePath(i->second.path(*store, drv.name));
}

12
src/libexpr/local.mk
View file

@ -4,7 +4,12 @@ libexpr_NAME = libnixexpr
libexpr_DIR := $(d)
libexpr_SOURCES := $(wildcard $(d)/*.cc) $(wildcard $(d)/primops/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
libexpr_SOURCES := \
$(wildcard $(d)/*.cc) \
$(wildcard $(d)/primops/*.cc) \
$(wildcard $(d)/flake/*.cc) \
$(d)/lexer-tab.cc \
$(d)/parser-tab.cc
libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libfetchers -I src/libmain -I src/libexpr
@ -34,4 +39,9 @@ dist-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer
$(eval $(call install-file-in, $(d)/nix-expr.pc, $(prefix)/lib/pkgconfig, 0644))
$(foreach i, $(wildcard src/libexpr/flake/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/flake, 0644)))
$(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh
$(d)/flake/flake.cc: $(d)/flake/call-flake.nix.gen.hh

2
src/libexpr/parser.y
View file

@ -719,7 +719,7 @@ std::pair<bool, std::string> EvalState::resolveSearchPathElem(const SearchPathEl
if (isUri(elem.second)) {
try {
res = { true, store->toRealPath(fetchers::downloadTarball(
store, resolveUri(elem.second), "source", false).storePath) };
store, resolveUri(elem.second), "source", false).first.storePath) };
} catch (FileTransferError & e) {
logWarning({
.name = "Entry download",

51
src/libexpr/primops.cc
View file

@ -30,18 +30,6 @@ namespace nix {
*************************************************************/
/* Decode a context string ‘!<name>!<path>’ into a pair <path,
name>. */
std::pair<string, string> decodeContext(const string & s)
{
if (s.at(0) == '!') {
size_t index = s.find("!", 1);
return std::pair<string, string>(string(s, index + 1), string(s, 1, index - 1));
} else
return std::pair<string, string>(s.at(0) == '/' ? s : string(s, 1), "");
}
InvalidPathError::InvalidPathError(const Path & path) :
EvalError("path '%s' is not valid", path), path(path) {}
@ -64,7 +52,7 @@ void EvalState::realiseContext(const PathSet & context)
DerivationOutputs::iterator i = drv.outputs.find(outputName);
if (i == drv.outputs.end())
throw Error("derivation '%s' does not have an output named '%s'", ctxS, outputName);
allowedPaths->insert(store->printStorePath(i->second.path));
allowedPaths->insert(store->printStorePath(i->second.path(*store, drv.name)));
}
}
}
@ -77,7 +65,7 @@ void EvalState::realiseContext(const PathSet & context)
/* For performance, prefetch all substitute info. */
StorePathSet willBuild, willSubstitute, unknown;
unsigned long long downloadSize, narSize;
uint64_t downloadSize, narSize;
store->queryMissing(drvs, willBuild, willSubstitute, unknown, downloadSize, narSize);
store->buildPaths(drvs);
@ -103,8 +91,17 @@ static void prim_scopedImport(EvalState & state, const Pos & pos, Value * * args
Path realPath = state.checkSourcePath(state.toRealPath(path, context));
// FIXME
if (state.store->isStorePath(path) && state.store->isValidPath(state.store->parseStorePath(path)) && isDerivation(path)) {
Derivation drv = state.store->readDerivation(state.store->parseStorePath(path));
auto isValidDerivationInStore = [&]() -> std::optional<StorePath> {
if (!state.store->isStorePath(path))
return std::nullopt;
auto storePath = state.store->parseStorePath(path);
if (!(state.store->isValidPath(storePath) && isDerivation(path)))
return std::nullopt;
return storePath;
};
if (auto optStorePath = isValidDerivationInStore()) {
auto storePath = *optStorePath;
Derivation drv = state.store->readDerivation(storePath);
Value & w = *state.allocValue();
state.mkAttrs(w, 3 + drv.outputs.size());
Value * v2 = state.allocAttr(w, state.sDrvPath);
@ -118,7 +115,7 @@ static void prim_scopedImport(EvalState & state, const Pos & pos, Value * * args
for (const auto & o : drv.outputs) {
v2 = state.allocAttr(w, state.symbols.create(o.first));
mkString(*v2, state.store->printStorePath(o.second.path), {"!" + o.first + "!" + path});
mkString(*v2, state.store->printStorePath(o.second.path(*state.store, drv.name)), {"!" + o.first + "!" + path});
outputsVal->listElems()[outputs_index] = state.allocValue();
mkString(*(outputsVal->listElems()[outputs_index++]), o.first);
}
@ -582,6 +579,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
/* Build the derivation expression by processing the attributes. */
Derivation drv;
drv.name = drvName;
PathSet context;
@ -776,11 +774,12 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
auto outPath = state.store->makeFixedOutputPath(ingestionMethod, h, drvName);
if (!jsonObject) drv.env["out"] = state.store->printStorePath(outPath);
drv.outputs.insert_or_assign("out", DerivationOutput {
.path = std::move(outPath),
.output = DerivationOutputFixed {
.hash = FixedOutputHash {
.method = ingestionMethod,
.hash = std::move(h),
},
},
});
}
@ -795,8 +794,9 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (!jsonObject) drv.env[i] = "";
drv.outputs.insert_or_assign(i,
DerivationOutput {
.output = DerivationOutputInputAddressed {
.path = StorePath::dummy,
.hash = std::optional<FixedOutputHash> {},
},
});
}
@ -807,8 +807,9 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (!jsonObject) drv.env[i] = state.store->printStorePath(outPath);
drv.outputs.insert_or_assign(i,
DerivationOutput {
.output = DerivationOutputInputAddressed {
.path = std::move(outPath),
.hash = std::optional<FixedOutputHash>(),
},
});
}
}
@ -829,7 +830,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
mkString(*state.allocAttr(v, state.sDrvPath), drvPathS, {"=" + drvPathS});
for (auto & i : drv.outputs) {
mkString(*state.allocAttr(v, state.symbols.create(i.first)),
state.store->printStorePath(i.second.path), {"!" + i.first + "!" + drvPathS});
state.store->printStorePath(i.second.path(*state.store, drv.name)), {"!" + i.first + "!" + drvPathS});
}
v.attrs->sort();
}
@ -1123,7 +1124,7 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
static void addPath(EvalState & state, const Pos & pos, const string & name, const Path & path_,
Value * filterFun, FileIngestionMethod method, const Hash & expectedHash, Value & v)
Value * filterFun, FileIngestionMethod method, const std::optional<Hash> expectedHash, Value & v)
{
const auto path = evalSettings.pureEval && expectedHash ?
path_ :
@ -1154,7 +1155,7 @@ static void addPath(EvalState & state, const Pos & pos, const string & name, con
std::optional<StorePath> expectedStorePath;
if (expectedHash)
expectedStorePath = state.store->makeFixedOutputPath(method, expectedHash, name);
expectedStorePath = state.store->makeFixedOutputPath(method, *expectedHash, name);
Path dstPath;
if (!expectedHash || !state.store->isValidPath(*expectedStorePath)) {
dstPath = state.store->printStorePath(settings.readOnlyMode
@ -1188,7 +1189,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
.errPos = pos
});
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, Hash(), v);
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, std::nullopt, v);
}
static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value & v)
@ -1198,7 +1199,7 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
string name;
Value * filterFun = nullptr;
auto method = FileIngestionMethod::Recursive;
Hash expectedHash;
std::optional<Hash> expectedHash;
for (auto & attr : *args[0]->attrs) {
const string & n(attr.name);

91
src/libexpr/primops/fetchGit.cc
View file

@ -1,91 +0,0 @@
#include "primops.hh"
#include "eval-inline.hh"
#include "store-api.hh"
#include "hash.hh"
#include "fetchers.hh"
#include "url.hh"
namespace nix {
static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
std::string url;
std::optional<std::string> ref;
std::optional<Hash> rev;
std::string name = "source";
bool fetchSubmodules = false;
PathSet context;
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
state.forceAttrs(*args[0], pos);
for (auto & attr : *args[0]->attrs) {
string n(attr.name);
if (n == "url")
url = state.coerceToString(*attr.pos, *attr.value, context, false, false);
else if (n == "ref")
ref = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "rev")
rev = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA1);
else if (n == "name")
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "submodules")
fetchSubmodules = state.forceBool(*attr.value, *attr.pos);
else
throw EvalError({
.hint = hintfmt("unsupported argument '%s' to 'fetchGit'", attr.name),
.errPos = *attr.pos
});
}
if (url.empty())
throw EvalError({
.hint = hintfmt("'url' argument required"),
.errPos = pos
});
} else
url = state.coerceToString(pos, *args[0], context, false, false);
// FIXME: git externals probably can be used to bypass the URI
// whitelist. Ah well.
state.checkURI(url);
if (evalSettings.pureEval && !rev)
throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
fetchers::Attrs attrs;
attrs.insert_or_assign("type", "git");
attrs.insert_or_assign("url", url.find("://") != std::string::npos ? url : "file://" + url);
if (ref) attrs.insert_or_assign("ref", *ref);
if (rev) attrs.insert_or_assign("rev", rev->gitRev());
if (fetchSubmodules) attrs.insert_or_assign("submodules", true);
auto input = fetchers::inputFromAttrs(attrs);
// FIXME: use name?
auto [tree, input2] = input->fetchTree(state.store);
state.mkAttrs(v, 8);
auto storePath = state.store->printStorePath(tree.storePath);
mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
// Backward compatibility: set 'rev' to
// 0000000000000000000000000000000000000000 for a dirty tree.
auto rev2 = input2->getRev().value_or(Hash(htSHA1));
mkString(*state.allocAttr(v, state.symbols.create("rev")), rev2.gitRev());
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), rev2.gitShortRev());
// Backward compatibility: set 'revCount' to 0 for a dirty tree.
mkInt(*state.allocAttr(v, state.symbols.create("revCount")),
tree.info.revCount.value_or(0));
mkBool(*state.allocAttr(v, state.symbols.create("submodules")), fetchSubmodules);
v.attrs->sort();
if (state.allowedPaths)
state.allowedPaths->insert(tree.actualPath);
}
static RegisterPrimOp r("fetchGit", 1, prim_fetchGit);
}

14
src/libexpr/primops/fetchMercurial.cc
View file

@ -65,23 +65,23 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
attrs.insert_or_assign("url", url.find("://") != std::string::npos ? url : "file://" + url);
if (ref) attrs.insert_or_assign("ref", *ref);
if (rev) attrs.insert_or_assign("rev", rev->gitRev());
auto input = fetchers::inputFromAttrs(attrs);
auto input = fetchers::Input::fromAttrs(std::move(attrs));
// FIXME: use name
auto [tree, input2] = input->fetchTree(state.store);
auto [tree, input2] = input.fetch(state.store);
state.mkAttrs(v, 8);
auto storePath = state.store->printStorePath(tree.storePath);
mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
if (input2->getRef())
mkString(*state.allocAttr(v, state.symbols.create("branch")), *input2->getRef());
if (input2.getRef())
mkString(*state.allocAttr(v, state.symbols.create("branch")), *input2.getRef());
// Backward compatibility: set 'rev' to
// 0000000000000000000000000000000000000000 for a dirty tree.
auto rev2 = input2->getRev().value_or(Hash(htSHA1));
auto rev2 = input2.getRev().value_or(Hash(htSHA1));
mkString(*state.allocAttr(v, state.symbols.create("rev")), rev2.gitRev());
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), std::string(rev2.gitRev(), 0, 12));
if (tree.info.revCount)
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *tree.info.revCount);
if (auto revCount = input2.getRevCount())
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *revCount);
v.attrs->sort();
if (state.allowedPaths)

131
src/libexpr/primops/fetchTree.cc
View file

@ -3,6 +3,7 @@
#include "store-api.hh"
#include "fetchers.hh"
#include "filetransfer.hh"
#include "registry.hh"
#include <ctime>
#include <iomanip>
@ -12,39 +13,73 @@ namespace nix {
void emitTreeAttrs(
EvalState & state,
const fetchers::Tree & tree,
std::shared_ptr<const fetchers::Input> input,
Value & v)
const fetchers::Input & input,
Value & v,
bool emptyRevFallback)
{
assert(input.isImmutable());
state.mkAttrs(v, 8);
auto storePath = state.store->printStorePath(tree.storePath);
mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
assert(tree.info.narHash);
mkString(*state.allocAttr(v, state.symbols.create("narHash")),
tree.info.narHash.to_string(SRI, true));
// FIXME: support arbitrary input attributes.
if (input->getRev()) {
mkString(*state.allocAttr(v, state.symbols.create("rev")), input->getRev()->gitRev());
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), input->getRev()->gitShortRev());
auto narHash = input.getNarHash();
assert(narHash);
mkString(*state.allocAttr(v, state.symbols.create("narHash")),
narHash->to_string(SRI, true));
if (auto rev = input.getRev()) {
mkString(*state.allocAttr(v, state.symbols.create("rev")), rev->gitRev());
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), rev->gitShortRev());
} else if (emptyRevFallback) {
// Backwards compat for `builtins.fetchGit`: dirty repos return an empty sha1 as rev
auto emptyHash = Hash(htSHA1);
mkString(*state.allocAttr(v, state.symbols.create("rev")), emptyHash.gitRev());
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), emptyHash.gitRev());
}
if (tree.info.revCount)
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *tree.info.revCount);
if (input.getType() == "git")
mkBool(*state.allocAttr(v, state.symbols.create("submodules")), maybeGetBoolAttr(input.attrs, "submodules").value_or(false));
if (tree.info.lastModified)
mkString(*state.allocAttr(v, state.symbols.create("lastModified")),
fmt("%s", std::put_time(std::gmtime(&*tree.info.lastModified), "%Y%m%d%H%M%S")));
if (auto revCount = input.getRevCount())
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *revCount);
else if (emptyRevFallback)
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), 0);
if (auto lastModified = input.getLastModified()) {
mkInt(*state.allocAttr(v, state.symbols.create("lastModified")), *lastModified);
mkString(*state.allocAttr(v, state.symbols.create("lastModifiedDate")),
fmt("%s", std::put_time(std::gmtime(&*lastModified), "%Y%m%d%H%M%S")));
}
v.attrs->sort();
}
static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, Value & v)
std::string fixURI(std::string uri, EvalState &state)
{
settings.requireExperimentalFeature("flakes");
state.checkURI(uri);
return uri.find("://") != std::string::npos ? uri : "file://" + uri;
}
std::shared_ptr<const fetchers::Input> input;
void addURI(EvalState &state, fetchers::Attrs &attrs, Symbol name, std::string v)
{
string n(name);
attrs.emplace(name, n == "url" ? fixURI(v, state) : v);
}
static void fetchTree(
EvalState &state,
const Pos &pos,
Value **args,
Value &v,
const std::optional<std::string> type,
bool emptyRevFallback = false
) {
fetchers::Input input;
PathSet context;
state.forceValue(*args[0]);
@ -56,35 +91,65 @@ static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, V
for (auto & attr : *args[0]->attrs) {
state.forceValue(*attr.value);
if (attr.value->type == tString)
attrs.emplace(attr.name, attr.value->string.s);
if (attr.value->type == tPath || attr.value->type == tString)
addURI(
state,
attrs,
attr.name,
state.coerceToString(*attr.pos, *attr.value, context, false, false)
);
else if (attr.value->type == tString)
addURI(state, attrs, attr.name, attr.value->string.s);
else if (attr.value->type == tBool)
attrs.emplace(attr.name, attr.value->boolean);
attrs.emplace(attr.name, fetchers::Explicit<bool>{attr.value->boolean});
else if (attr.value->type == tInt)
attrs.emplace(attr.name, attr.value->integer);
else
throw TypeError("fetchTree argument '%s' is %s while a string or Boolean is expected",
throw TypeError("fetchTree argument '%s' is %s while a string, Boolean or integer is expected",
attr.name, showType(*attr.value));
}
if (type)
attrs.emplace("type", type.value());
if (!attrs.count("type"))
throw Error({
.hint = hintfmt("attribute 'type' is missing in call to 'fetchTree'"),
.errPos = pos
});
input = fetchers::inputFromAttrs(attrs);
} else
input = fetchers::inputFromURL(state.coerceToString(pos, *args[0], context, false, false));
input = fetchers::Input::fromAttrs(std::move(attrs));
} else {
auto url = fixURI(state.coerceToString(pos, *args[0], context, false, false), state);
if (evalSettings.pureEval && !input->isImmutable())
throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input");
if (type == "git") {
fetchers::Attrs attrs;
attrs.emplace("type", "git");
attrs.emplace("url", url);
input = fetchers::Input::fromAttrs(std::move(attrs));
} else {
input = fetchers::Input::fromURL(url);
}
}
// FIXME: use fetchOrSubstituteTree
auto [tree, input2] = input->fetchTree(state.store);
if (!evalSettings.pureEval && !input.isDirect())
input = lookupInRegistries(state.store, input).first;
if (evalSettings.pureEval && !input.isImmutable())
throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input, at %s", pos);
auto [tree, input2] = input.fetch(state.store);
if (state.allowedPaths)
state.allowedPaths->insert(tree.actualPath);
emitTreeAttrs(state, tree, input2, v);
emitTreeAttrs(state, tree, input2, v, emptyRevFallback);
}
static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
settings.requireExperimentalFeature("flakes");
fetchTree(state, pos, args, v, std::nullopt);
}
static RegisterPrimOp r("fetchTree", 1, prim_fetchTree);
@ -136,7 +201,7 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
auto storePath =
unpack
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).storePath
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).first.storePath
: fetchers::downloadFile(state.store, *url, name, (bool) expectedHash).storePath;
auto path = state.store->toRealPath(storePath);
@ -147,7 +212,7 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
: hashFile(htSHA256, path);
if (hash != *expectedHash)
throw Error((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n wanted: %s\n got: %s",
*url, expectedHash->to_string(Base32, true), hash.to_string(Base32, true));
*url, expectedHash->to_string(Base32, true), hash->to_string(Base32, true));
}
if (state.allowedPaths)
@ -166,7 +231,13 @@ static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args
fetch(state, pos, args, v, "fetchTarball", true, "source");
}
static void prim_fetchGit(EvalState &state, const Pos &pos, Value **args, Value &v)
{
fetchTree(state, pos, args, v, "git", true);
}
static RegisterPrimOp r2("__fetchurl", 1, prim_fetchurl);
static RegisterPrimOp r3("fetchTarball", 1, prim_fetchTarball);
static RegisterPrimOp r4("fetchGit", 1, prim_fetchGit);
}

11
src/libexpr/symbol-table.hh
View file

@ -28,6 +28,12 @@ public:
return s == s2.s;
}
// FIXME: remove
bool operator == (std::string_view s2) const
{
return s->compare(s2) == 0;
}
bool operator != (const Symbol & s2) const
{
return s != s2.s;
@ -68,9 +74,10 @@ private:
Symbols symbols;
public:
Symbol create(const string & s)
Symbol create(std::string_view s)
{
std::pair<Symbols::iterator, bool> res = symbols.insert(s);
// FIXME: avoid allocation if 's' already exists in the symbol table.
std::pair<Symbols::iterator, bool> res = symbols.emplace(std::string(s));
return Symbol(&*res.first);
}

7
src/libexpr/value.hh
View file

@ -166,6 +166,13 @@ struct Value
{
return type == tList1 ? 1 : type == tList2 ? 2 : bigList.size;
}
/* Check whether forcing this value requires a trivial amount of
computation. In particular, function applications are
non-trivial. */
bool isTrivial() const;
std::vector<std::pair<Path, std::string>> getContext();
};

14
src/libfetchers/attrs.cc
View file

@ -27,7 +27,7 @@ nlohmann::json attrsToJson(const Attrs & attrs)
{
nlohmann::json json;
for (auto & attr : attrs) {
if (auto v = std::get_if<int64_t>(&attr.second)) {
if (auto v = std::get_if<uint64_t>(&attr.second)) {
json[attr.first] = *v;
} else if (auto v = std::get_if<std::string>(&attr.second)) {
json[attr.first] = *v;
@ -55,16 +55,16 @@ std::string getStrAttr(const Attrs & attrs, const std::string & name)
return *s;
}
std::optional<int64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name)
std::optional<uint64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name)
{
auto i = attrs.find(name);
if (i == attrs.end()) return {};
if (auto v = std::get_if<int64_t>(&i->second))
if (auto v = std::get_if<uint64_t>(&i->second))
return *v;
throw Error("input attribute '%s' is not an integer", name);
}
int64_t getIntAttr(const Attrs & attrs, const std::string & name)
uint64_t getIntAttr(const Attrs & attrs, const std::string & name)
{
auto s = maybeGetIntAttr(attrs, name);
if (!s)
@ -76,8 +76,8 @@ std::optional<bool> maybeGetBoolAttr(const Attrs & attrs, const std::string & na
{
auto i = attrs.find(name);
if (i == attrs.end()) return {};
if (auto v = std::get_if<int64_t>(&i->second))
return *v;
if (auto v = std::get_if<Explicit<bool>>(&i->second))
return v->t;
throw Error("input attribute '%s' is not a Boolean", name);
}
@ -93,7 +93,7 @@ std::map<std::string, std::string> attrsToQuery(const Attrs & attrs)
{
std::map<std::string, std::string> query;
for (auto & attr : attrs) {
if (auto v = std::get_if<int64_t>(&attr.second)) {
if (auto v = std::get_if<uint64_t>(&attr.second)) {
query.insert_or_assign(attr.first, fmt("%d", *v));
} else if (auto v = std::get_if<std::string>(&attr.second)) {
query.insert_or_assign(attr.first, *v);

11
src/libfetchers/attrs.hh
View file

@ -13,9 +13,14 @@ namespace nix::fetchers {
template<typename T>
struct Explicit {
T t;
bool operator ==(const Explicit<T> & other) const
{
return t == other.t;
}
};
typedef std::variant<std::string, int64_t, Explicit<bool>> Attr;
typedef std::variant<std::string, uint64_t, Explicit<bool>> Attr;
typedef std::map<std::string, Attr> Attrs;
Attrs jsonToAttrs(const nlohmann::json & json);
@ -26,9 +31,9 @@ std::optional<std::string> maybeGetStrAttr(const Attrs & attrs, const std::strin
std::string getStrAttr(const Attrs & attrs, const std::string & name);
std::optional<int64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name);
std::optional<uint64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name);
int64_t getIntAttr(const Attrs & attrs, const std::string & name);
uint64_t getIntAttr(const Attrs & attrs, const std::string & name);
std::optional<bool> maybeGetBoolAttr(const Attrs & attrs, const std::string & name);

258
src/libfetchers/fetchers.cc
View file

@ -5,71 +5,265 @@
namespace nix::fetchers {
std::unique_ptr<std::vector<std::unique_ptr<InputScheme>>> inputSchemes = nullptr;
std::unique_ptr<std::vector<std::shared_ptr<InputScheme>>> inputSchemes = nullptr;
void registerInputScheme(std::unique_ptr<InputScheme> && inputScheme)
void registerInputScheme(std::shared_ptr<InputScheme> && inputScheme)
{
if (!inputSchemes) inputSchemes = std::make_unique<std::vector<std::unique_ptr<InputScheme>>>();
if (!inputSchemes) inputSchemes = std::make_unique<std::vector<std::shared_ptr<InputScheme>>>();
inputSchemes->push_back(std::move(inputScheme));
}
std::unique_ptr<Input> inputFromURL(const ParsedURL & url)
Input Input::fromURL(const std::string & url)
{
return fromURL(parseURL(url));
}
static void fixupInput(Input & input)
{
// Check common attributes.
input.getType();
input.getRef();
if (input.getRev())
input.immutable = true;
input.getRevCount();
input.getLastModified();
if (input.getNarHash())
input.immutable = true;
}
Input Input::fromURL(const ParsedURL & url)
{
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromURL(url);
if (res) return res;
if (res) {
res->scheme = inputScheme;
fixupInput(*res);
return std::move(*res);
}
}
throw Error("input '%s' is unsupported", url.url);
}
std::unique_ptr<Input> inputFromURL(const std::string & url)
Input Input::fromAttrs(Attrs && attrs)
{
return inputFromURL(parseURL(url));
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromAttrs(attrs);
if (res) {
res->scheme = inputScheme;
fixupInput(*res);
return std::move(*res);
}
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs)
Input input;
input.attrs = attrs;
fixupInput(input);
return input;
}
ParsedURL Input::toURL() const
{
auto attrs2(attrs);
attrs2.erase("narHash");
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromAttrs(attrs2);
if (res) {
if (auto narHash = maybeGetStrAttr(attrs, "narHash"))
// FIXME: require SRI hash.
res->narHash = newHashAllowEmpty(*narHash, {});
return res;
if (!scheme)
throw Error("cannot show unsupported input '%s'", attrsToJson(attrs));
return scheme->toURL(*this);
}
}
throw Error("input '%s' is unsupported", attrsToJson(attrs));
std::string Input::to_string() const
{
return toURL().to_string();
}
Attrs Input::toAttrs() const
{
auto attrs = toAttrsInternal();
if (narHash)
attrs.emplace("narHash", narHash->to_string(SRI, true));
attrs.emplace("type", type());
return attrs;
}
std::pair<Tree, std::shared_ptr<const Input>> Input::fetchTree(ref<Store> store) const
bool Input::hasAllInfo() const
{
auto [tree, input] = fetchTreeInternal(store);
return getNarHash() && scheme && scheme->hasAllInfo(*this);
}
bool Input::operator ==(const Input & other) const
{
return attrs == other.attrs;
}
bool Input::contains(const Input & other) const
{
if (*this == other) return true;
auto other2(other);
other2.attrs.erase("ref");
other2.attrs.erase("rev");
if (*this == other2) return true;
return false;
}
std::pair<Tree, Input> Input::fetch(ref<Store> store) const
{
if (!scheme)
throw Error("cannot fetch unsupported input '%s'", attrsToJson(toAttrs()));
/* The tree may already be in the Nix store, or it could be
substituted (which is often faster than fetching from the
original source). So check that. */
if (hasAllInfo()) {
try {
auto storePath = computeStorePath(*store);
store->ensurePath(storePath);
debug("using substituted/cached input '%s' in '%s'",
to_string(), store->printStorePath(storePath));
auto actualPath = store->toRealPath(storePath);
return {fetchers::Tree(std::move(actualPath), std::move(storePath)), *this};
} catch (Error & e) {
debug("substitution of input '%s' failed: %s", to_string(), e.what());
}
}
auto [tree, input] = scheme->fetch(store, *this);
if (tree.actualPath == "")
tree.actualPath = store->toRealPath(tree.storePath);
if (!tree.info.narHash)
tree.info.narHash = store->queryPathInfo(tree.storePath)->narHash;
auto narHash = store->queryPathInfo(tree.storePath)->narHash;
input.attrs.insert_or_assign("narHash", narHash->to_string(SRI, true));
if (input->narHash)
assert(input->narHash == tree.info.narHash);
if (auto prevNarHash = getNarHash()) {
if (narHash != *prevNarHash)
throw Error((unsigned int) 102, "NAR hash mismatch in input '%s' (%s), expected '%s', got '%s'",
to_string(), tree.actualPath, prevNarHash->to_string(SRI, true), narHash->to_string(SRI, true));
}
if (narHash && narHash != input->narHash)
throw Error("NAR hash mismatch in input '%s' (%s), expected '%s', got '%s'",
to_string(), tree.actualPath, narHash->to_string(SRI, true), input->narHash->to_string(SRI, true));
if (auto prevLastModified = getLastModified()) {
if (input.getLastModified() != prevLastModified)
throw Error("'lastModified' attribute mismatch in input '%s', expected %d",
input.to_string(), *prevLastModified);
}
if (auto prevRevCount = getRevCount()) {
if (input.getRevCount() != prevRevCount)
throw Error("'revCount' attribute mismatch in input '%s', expected %d",
input.to_string(), *prevRevCount);
}
input.immutable = true;
assert(input.hasAllInfo());
return {std::move(tree), input};
}
Input Input::applyOverrides(
std::optional<std::string> ref,
std::optional<Hash> rev) const
{
if (!scheme) return *this;
return scheme->applyOverrides(*this, ref, rev);
}
void Input::clone(const Path & destDir) const
{
assert(scheme);
scheme->clone(*this, destDir);
}
std::optional<Path> Input::getSourcePath() const
{
assert(scheme);
return scheme->getSourcePath(*this);
}
void Input::markChangedFile(
std::string_view file,
std::optional<std::string> commitMsg) const
{
assert(scheme);
return scheme->markChangedFile(*this, file, commitMsg);
}
StorePath Input::computeStorePath(Store & store) const
{
auto narHash = getNarHash();
if (!narHash)
throw Error("cannot compute store path for mutable input '%s'", to_string());
return store.makeFixedOutputPath(FileIngestionMethod::Recursive, *narHash, "source");
}
std::string Input::getType() const
{
return getStrAttr(attrs, "type");
}
std::optional<Hash> Input::getNarHash() const
{
if (auto s = maybeGetStrAttr(attrs, "narHash"))
// FIXME: require SRI hash.
return newHashAllowEmpty(*s, htSHA256);
return {};
}
std::optional<std::string> Input::getRef() const
{
if (auto s = maybeGetStrAttr(attrs, "ref"))
return *s;
return {};
}
std::optional<Hash> Input::getRev() const
{
if (auto s = maybeGetStrAttr(attrs, "rev"))
return Hash(*s, htSHA1);
return {};
}
std::optional<uint64_t> Input::getRevCount() const
{
if (auto n = maybeGetIntAttr(attrs, "revCount"))
return *n;
return {};
}
std::optional<time_t> Input::getLastModified() const
{
if (auto n = maybeGetIntAttr(attrs, "lastModified"))
return *n;
return {};
}
ParsedURL InputScheme::toURL(const Input & input)
{
throw Error("don't know how to convert input '%s' to a URL", attrsToJson(input.attrs));
}
Input InputScheme::applyOverrides(
const Input & input,
std::optional<std::string> ref,
std::optional<Hash> rev)
{
if (ref)
throw Error("don't know how to set branch/tag name of input '%s' to '%s'", input.to_string(), *ref);
if (rev)
throw Error("don't know how to set revision of input '%s' to '%s'", input.to_string(), rev->gitRev());
return input;
}
std::optional<Path> InputScheme::getSourcePath(const Input & input)
{
return {};
}
void InputScheme::markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg)
{
assert(false);
}
void InputScheme::clone(const Input & input, const Path & destDir)
{
throw Error("do not know how to clone input '%s'", input.to_string());
}
}

111
src/libfetchers/fetchers.hh
View file

@ -3,7 +3,6 @@
#include "types.hh"
#include "hash.hh"
#include "path.hh"
#include "tree-info.hh"
#include "attrs.hh"
#include "url.hh"
@ -13,73 +12,101 @@ namespace nix { class Store; }
namespace nix::fetchers {
struct Input;
struct Tree
{
Path actualPath;
StorePath storePath;
TreeInfo info;
Tree(Path && actualPath, StorePath && storePath) : actualPath(actualPath), storePath(std::move(storePath)) {}
};
struct Input : std::enable_shared_from_this<Input>
struct InputScheme;
struct Input
{
std::optional<Hash> narHash; // FIXME: implement
friend class InputScheme;
virtual std::string type() const = 0;
std::shared_ptr<InputScheme> scheme; // note: can be null
Attrs attrs;
bool immutable = false;
bool direct = true;
virtual ~Input() { }
public:
static Input fromURL(const std::string & url);
virtual bool operator ==(const Input & other) const { return false; }
static Input fromURL(const ParsedURL & url);
/* Check whether this is a "direct" input, that is, not
one that goes through a registry. */
virtual bool isDirect() const { return true; }
static Input fromAttrs(Attrs && attrs);
/* Check whether this is an "immutable" input, that is,
one that contains a commit hash or content hash. */
virtual bool isImmutable() const { return (bool) narHash; }
ParsedURL toURL() const;
virtual bool contains(const Input & other) const { return false; }
virtual std::optional<std::string> getRef() const { return {}; }
virtual std::optional<Hash> getRev() const { return {}; }
virtual ParsedURL toURL() const = 0;
std::string to_string() const
{
return toURL().to_string();
}
std::string to_string() const;
Attrs toAttrs() const;
std::pair<Tree, std::shared_ptr<const Input>> fetchTree(ref<Store> store) const;
/* Check whether this is a "direct" input, that is, not
one that goes through a registry. */
bool isDirect() const { return direct; }
private:
/* Check whether this is an "immutable" input, that is,
one that contains a commit hash or content hash. */
bool isImmutable() const { return immutable; }
virtual std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(ref<Store> store) const = 0;
bool hasAllInfo() const;
virtual Attrs toAttrsInternal() const = 0;
bool operator ==(const Input & other) const;
bool contains(const Input & other) const;
std::pair<Tree, Input> fetch(ref<Store> store) const;
Input applyOverrides(
std::optional<std::string> ref,
std::optional<Hash> rev) const;
void clone(const Path & destDir) const;
std::optional<Path> getSourcePath() const;
void markChangedFile(
std::string_view file,
std::optional<std::string> commitMsg) const;
StorePath computeStorePath(Store & store) const;
// Convience functions for common attributes.
std::string getType() const;
std::optional<Hash> getNarHash() const;
std::optional<std::string> getRef() const;
std::optional<Hash> getRev() const;
std::optional<uint64_t> getRevCount() const;
std::optional<time_t> getLastModified() const;
};
struct InputScheme
{
virtual ~InputScheme() { }
virtual std::optional<Input> inputFromURL(const ParsedURL & url) = 0;
virtual std::unique_ptr<Input> inputFromURL(const ParsedURL & url) = 0;
virtual std::optional<Input> inputFromAttrs(const Attrs & attrs) = 0;
virtual std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) = 0;
virtual ParsedURL toURL(const Input & input);
virtual bool hasAllInfo(const Input & input) = 0;
virtual Input applyOverrides(
const Input & input,
std::optional<std::string> ref,
std::optional<Hash> rev);
virtual void clone(const Input & input, const Path & destDir);
virtual std::optional<Path> getSourcePath(const Input & input);
virtual void markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg);
virtual std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) = 0;
};
std::unique_ptr<Input> inputFromURL(const ParsedURL & url);
std::unique_ptr<Input> inputFromURL(const std::string & url);
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs);
void registerInputScheme(std::unique_ptr<InputScheme> && fetcher);
void registerInputScheme(std::shared_ptr<InputScheme> && fetcher);
struct DownloadFileResult
{
@ -94,7 +121,7 @@ DownloadFileResult downloadFile(
const std::string & name,
bool immutable);
Tree downloadTarball(
std::pair<Tree, time_t> downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,

323
src/libfetchers/git.cc
View file

@ -22,80 +22,152 @@ static bool isNotDotGitDirectory(const Path & path)
return not std::regex_match(path, gitDirRegex);
}
struct GitInput : Input
struct GitInputScheme : InputScheme
{
ParsedURL url;
std::optional<std::string> ref;
std::optional<Hash> rev;
bool shallow = false;
bool submodules = false;
GitInput(const ParsedURL & url) : url(url)
{ }
std::string type() const override { return "git"; }
bool operator ==(const Input & other) const override
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
auto other2 = dynamic_cast<const GitInput *>(&other);
return
other2
&& url == other2->url
&& rev == other2->rev
&& ref == other2->ref;
}
if (url.scheme != "git" &&
url.scheme != "git+http" &&
url.scheme != "git+https" &&
url.scheme != "git+ssh" &&
url.scheme != "git+file") return {};
bool isImmutable() const override
{
return (bool) rev || narHash;
}
auto url2(url);
if (hasPrefix(url2.scheme, "git+")) url2.scheme = std::string(url2.scheme, 4);
url2.query.clear();
std::optional<std::string> getRef() const override { return ref; }
std::optional<Hash> getRev() const override { return rev; }
ParsedURL toURL() const override
{
ParsedURL url2(url);
if (url2.scheme != "git") url2.scheme = "git+" + url2.scheme;
if (rev) url2.query.insert_or_assign("rev", rev->gitRev());
if (ref) url2.query.insert_or_assign("ref", *ref);
if (shallow) url2.query.insert_or_assign("shallow", "1");
return url2;
}
Attrs toAttrsInternal() const override
{
Attrs attrs;
attrs.emplace("url", url.to_string());
if (ref)
attrs.emplace("ref", *ref);
if (rev)
attrs.emplace("rev", rev->gitRev());
if (shallow)
attrs.emplace("shallow", true);
if (submodules)
attrs.emplace("submodules", true);
return attrs;
attrs.emplace("type", "git");
for (auto &[name, value] : url.query) {
if (name == "rev" || name == "ref")
attrs.emplace(name, value);
else if (name == "shallow")
attrs.emplace(name, Explicit<bool> { value == "1" });
else
url2.query.emplace(name, value);
}
std::pair<bool, std::string> getActualUrl() const
attrs.emplace("url", url2.to_string());
return inputFromAttrs(attrs);
}
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "git") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash")
throw Error("unsupported Git input attribute '%s'", name);
parseURL(getStrAttr(attrs, "url"));
maybeGetBoolAttr(attrs, "shallow");
maybeGetBoolAttr(attrs, "submodules");
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (std::regex_search(*ref, badGitRefRegex))
throw BadURL("invalid Git branch/tag name '%s'", *ref);
}
Input input;
input.attrs = attrs;
return input;
}
ParsedURL toURL(const Input & input) override
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
if (url.scheme != "git") url.scheme = "git+" + url.scheme;
if (auto rev = input.getRev()) url.query.insert_or_assign("rev", rev->gitRev());
if (auto ref = input.getRef()) url.query.insert_or_assign("ref", *ref);
if (maybeGetBoolAttr(input.attrs, "shallow").value_or(false))
url.query.insert_or_assign("shallow", "1");
return url;
}
bool hasAllInfo(const Input & input) override
{
bool maybeDirty = !input.getRef();
bool shallow = maybeGetBoolAttr(input.attrs, "shallow").value_or(false);
return
maybeGetIntAttr(input.attrs, "lastModified")
&& (shallow || maybeDirty || maybeGetIntAttr(input.attrs, "revCount"));
}
Input applyOverrides(
const Input & input,
std::optional<std::string> ref,
std::optional<Hash> rev) override
{
auto res(input);
if (rev) res.attrs.insert_or_assign("rev", rev->gitRev());
if (ref) res.attrs.insert_or_assign("ref", *ref);
if (!res.getRef() && res.getRev())
throw Error("Git input '%s' has a commit hash but no branch/tag name", res.to_string());
return res;
}
void clone(const Input & input, const Path & destDir) override
{
auto [isLocal, actualUrl] = getActualUrl(input);
Strings args = {"clone"};
args.push_back(actualUrl);
if (auto ref = input.getRef()) {
args.push_back("--branch");
args.push_back(*ref);
}
if (input.getRev()) throw Error("cloning a specific revision is not implemented");
args.push_back(destDir);
runProgram("git", true, args);
}
std::optional<Path> getSourcePath(const Input & input) override
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
if (url.scheme == "file" && !input.getRef() && !input.getRev())
return url.path;
return {};
}
void markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg) override
{
auto sourcePath = getSourcePath(input);
assert(sourcePath);
runProgram("git", true,
{ "-C", *sourcePath, "add", "--force", "--intent-to-add", "--", std::string(file) });
if (commitMsg)
runProgram("git", true,
{ "-C", *sourcePath, "commit", std::string(file), "-m", *commitMsg });
}
std::pair<bool, std::string> getActualUrl(const Input & input) const
{
// Don't clone file:// URIs (but otherwise treat them the
// same as remote URIs, i.e. don't use the working tree or
// HEAD).
static bool forceHttp = getEnv("_NIX_FORCE_HTTP") == "1"; // for testing
auto url = parseURL(getStrAttr(input.attrs, "url"));
bool isLocal = url.scheme == "file" && !forceHttp;
return {isLocal, isLocal ? url.path : url.base};
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
std::pair<Tree, Input> fetch(ref<Store> store, const Input & _input) override
{
auto name = "source";
auto input = std::make_shared<GitInput>(*this);
Input input(_input);
assert(!rev || rev->type == htSHA1);
bool shallow = maybeGetBoolAttr(input.attrs, "shallow").value_or(false);
bool submodules = maybeGetBoolAttr(input.attrs, "submodules").value_or(false);
std::string cacheType = "git";
if (shallow) cacheType += "-shallow";
@ -106,39 +178,35 @@ struct GitInput : Input
return Attrs({
{"type", cacheType},
{"name", name},
{"rev", input->rev->gitRev()},
{"rev", input.getRev()->gitRev()},
});
};
auto makeResult = [&](const Attrs & infoAttrs, StorePath && storePath)
-> std::pair<Tree, std::shared_ptr<const Input>>
-> std::pair<Tree, Input>
{
assert(input->rev);
assert(!rev || rev == input->rev);
assert(input.getRev());
assert(!_input.getRev() || _input.getRev() == input.getRev());
if (!shallow)
input.attrs.insert_or_assign("revCount", getIntAttr(infoAttrs, "revCount"));
input.attrs.insert_or_assign("lastModified", getIntAttr(infoAttrs, "lastModified"));
return {
Tree {
.actualPath = store->toRealPath(storePath),
.storePath = std::move(storePath),
.info = TreeInfo {
.revCount = shallow ? std::nullopt : std::optional(getIntAttr(infoAttrs, "revCount")),
.lastModified = getIntAttr(infoAttrs, "lastModified"),
},
},
Tree(store->toRealPath(storePath), std::move(storePath)),
input
};
};
if (rev) {
if (input.getRev()) {
if (auto res = getCache()->lookup(store, getImmutableAttrs()))
return makeResult(res->first, std::move(res->second));
}
auto [isLocal, actualUrl_] = getActualUrl();
auto [isLocal, actualUrl_] = getActualUrl(input);
auto actualUrl = actualUrl_; // work around clang bug
// If this is a local directory and no ref or revision is
// given, then allow the use of an unclean working tree.
if (!input->ref && !input->rev && isLocal) {
if (!input.getRef() && !input.getRev() && isLocal) {
bool clean = false;
/* Check whether this repo has any commits. There are
@ -197,35 +265,35 @@ struct GitInput : Input
auto storePath = store->addToStore("source", actualUrl, FileIngestionMethod::Recursive, htSHA256, filter);
auto tree = Tree {
.actualPath = store->printStorePath(storePath),
.storePath = std::move(storePath),
.info = TreeInfo {
// FIXME: maybe we should use the timestamp of the last
// modified dirty file?
.lastModified = haveCommits ? std::stoull(runProgram("git", true, { "-C", actualUrl, "log", "-1", "--format=%ct", "HEAD" })) : 0,
}
input.attrs.insert_or_assign(
"lastModified",
haveCommits ? std::stoull(runProgram("git", true, { "-C", actualUrl, "log", "-1", "--format=%ct", "HEAD" })) : 0);
return {
Tree(store->printStorePath(storePath), std::move(storePath)),
input
};
return {std::move(tree), input};
}
}
if (!input->ref) input->ref = isLocal ? readHead(actualUrl) : "master";
if (!input.getRef()) input.attrs.insert_or_assign("ref", isLocal ? readHead(actualUrl) : "master");
Attrs mutableAttrs({
{"type", cacheType},
{"name", name},
{"url", actualUrl},
{"ref", *input->ref},
{"ref", *input.getRef()},
});
Path repoDir;
if (isLocal) {
if (!input->rev)
input->rev = Hash(chomp(runProgram("git", true, { "-C", actualUrl, "rev-parse", *input->ref })), htSHA1);
if (!input.getRev())
input.attrs.insert_or_assign("rev",
Hash(chomp(runProgram("git", true, { "-C", actualUrl, "rev-parse", *input.getRef() })), htSHA1).gitRev());
repoDir = actualUrl;
@ -233,8 +301,8 @@ struct GitInput : Input
if (auto res = getCache()->lookup(store, mutableAttrs)) {
auto rev2 = Hash(getStrAttr(res->first, "rev"), htSHA1);
if (!rev || rev == rev2) {
input->rev = rev2;
if (!input.getRev() || input.getRev() == rev2) {
input.attrs.insert_or_assign("rev", rev2.gitRev());
return makeResult(res->first, std::move(res->second));
}
}
@ -248,18 +316,18 @@ struct GitInput : Input
}
Path localRefFile =
input->ref->compare(0, 5, "refs/") == 0
? cacheDir + "/" + *input->ref
: cacheDir + "/refs/heads/" + *input->ref;
input.getRef()->compare(0, 5, "refs/") == 0
? cacheDir + "/" + *input.getRef()
: cacheDir + "/refs/heads/" + *input.getRef();
bool doFetch;
time_t now = time(0);
/* If a rev was specified, we need to fetch if it's not in the
repo. */
if (input->rev) {
if (input.getRev()) {
try {
runProgram("git", true, { "-C", repoDir, "cat-file", "-e", input->rev->gitRev() });
runProgram("git", true, { "-C", repoDir, "cat-file", "-e", input.getRev()->gitRev() });
doFetch = false;
} catch (ExecError & e) {
if (WIFEXITED(e.status)) {
@ -282,9 +350,10 @@ struct GitInput : Input
// FIXME: git stderr messes up our progress indicator, so
// we're using --quiet for now. Should process its stderr.
try {
auto fetchRef = input->ref->compare(0, 5, "refs/") == 0
? *input->ref
: "refs/heads/" + *input->ref;
auto ref = input.getRef();
auto fetchRef = ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", fetchRef, fetchRef) });
} catch (Error & e) {
if (!pathExists(localRefFile)) throw;
@ -300,8 +369,8 @@ struct GitInput : Input
utimes(localRefFile.c_str(), times);
}
if (!input->rev)
input->rev = Hash(chomp(readFile(localRefFile)), htSHA1);
if (!input.getRev())
input.attrs.insert_or_assign("rev", Hash(chomp(readFile(localRefFile)), htSHA1).gitRev());
}
bool isShallow = chomp(runProgram("git", true, { "-C", repoDir, "rev-parse", "--is-shallow-repository" })) == "true";
@ -311,7 +380,7 @@ struct GitInput : Input
// FIXME: check whether rev is an ancestor of ref.
printTalkative("using revision %s of repo '%s'", input->rev->gitRev(), actualUrl);
printTalkative("using revision %s of repo '%s'", input.getRev()->gitRev(), actualUrl);
/* Now that we know the ref, check again whether we have it in
the store. */
@ -333,7 +402,7 @@ struct GitInput : Input
runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
"--update-head-ok", "--", repoDir, "refs/*:refs/*" });
runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input->rev->gitRev() });
runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input.getRev()->gitRev() });
runProgram("git", true, { "-C", tmpDir, "remote", "add", "origin", actualUrl });
runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" });
@ -342,7 +411,7 @@ struct GitInput : Input
// FIXME: should pipe this, or find some better way to extract a
// revision.
auto source = sinkToSource([&](Sink & sink) {
RunOptions gitOptions("git", { "-C", repoDir, "archive", input->rev->gitRev() });
RunOptions gitOptions("git", { "-C", repoDir, "archive", input.getRev()->gitRev() });
gitOptions.standardOut = &sink;
runProgram2(gitOptions);
});
@ -352,18 +421,18 @@ struct GitInput : Input
auto storePath = store->addToStore(name, tmpDir, FileIngestionMethod::Recursive, htSHA256, filter);
auto lastModified = std::stoull(runProgram("git", true, { "-C", repoDir, "log", "-1", "--format=%ct", input->rev->gitRev() }));
auto lastModified = std::stoull(runProgram("git", true, { "-C", repoDir, "log", "-1", "--format=%ct", input.getRev()->gitRev() }));
Attrs infoAttrs({
{"rev", input->rev->gitRev()},
{"rev", input.getRev()->gitRev()},
{"lastModified", lastModified},
});
if (!shallow)
infoAttrs.insert_or_assign("revCount",
std::stoull(runProgram("git", true, { "-C", repoDir, "rev-list", "--count", input->rev->gitRev() })));
std::stoull(runProgram("git", true, { "-C", repoDir, "rev-list", "--count", input.getRev()->gitRev() })));
if (!this->rev)
if (!_input.getRev())
getCache()->add(
store,
mutableAttrs,
@ -382,60 +451,6 @@ struct GitInput : Input
}
};
struct GitInputScheme : InputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "git" &&
url.scheme != "git+http" &&
url.scheme != "git+https" &&
url.scheme != "git+ssh" &&
url.scheme != "git+file") return nullptr;
auto url2(url);
if (hasPrefix(url2.scheme, "git+")) url2.scheme = std::string(url2.scheme, 4);
url2.query.clear();
Attrs attrs;
attrs.emplace("type", "git");
for (auto &[name, value] : url.query) {
if (name == "rev" || name == "ref")
attrs.emplace(name, value);
else
url2.query.emplace(name, value);
}
attrs.emplace("url", url2.to_string());
return inputFromAttrs(attrs);
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "git") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules")
throw Error("unsupported Git input attribute '%s'", name);
auto input = std::make_unique<GitInput>(parseURL(getStrAttr(attrs, "url")));
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (std::regex_search(*ref, badGitRefRegex))
throw BadURL("invalid Git branch/tag name '%s'", *ref);
input->ref = *ref;
}
if (auto rev = maybeGetStrAttr(attrs, "rev"))
input->rev = Hash(*rev, htSHA1);
input->shallow = maybeGetBoolAttr(attrs, "shallow").value_or(false);
input->submodules = maybeGetBoolAttr(attrs, "submodules").value_or(false);
return input;
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<GitInputScheme>()); });
}

316
src/libfetchers/github.cc
View file

@ -8,81 +8,142 @@
namespace nix::fetchers {
std::regex ownerRegex("[a-zA-Z][a-zA-Z0-9_-]*", std::regex::ECMAScript);
std::regex repoRegex("[a-zA-Z][a-zA-Z0-9_-]*", std::regex::ECMAScript);
// A github or gitlab url
const static std::string urlRegexS = "[a-zA-Z0-9.]*"; // FIXME: check
std::regex urlRegex(urlRegexS, std::regex::ECMAScript);
struct GitHubInput : Input
struct GitArchiveInputScheme : InputScheme
{
std::string owner;
std::string repo;
std::optional<std::string> ref;
virtual std::string type() = 0;
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != type()) return {};
auto path = tokenizeString<std::vector<std::string>>(url.path, "/");
std::optional<Hash> rev;
std::optional<std::string> ref;
std::optional<std::string> host_url;
std::string type() const override { return "github"; }
if (path.size() == 2) {
} else if (path.size() == 3) {
if (std::regex_match(path[2], revRegex))
rev = Hash(path[2], htSHA1);
else if (std::regex_match(path[2], refRegex))
ref = path[2];
else
throw BadURL("in URL '%s', '%s' is not a commit hash or branch/tag name", url.url, path[2]);
} else
throw BadURL("URL '%s' is invalid", url.url);
bool operator ==(const Input & other) const override
{
auto other2 = dynamic_cast<const GitHubInput *>(&other);
return
other2
&& owner == other2->owner
&& repo == other2->repo
&& rev == other2->rev
&& ref == other2->ref;
for (auto &[name, value] : url.query) {
if (name == "rev") {
if (rev)
throw BadURL("URL '%s' contains multiple commit hashes", url.url);
rev = Hash(value, htSHA1);
}
else if (name == "ref") {
if (!std::regex_match(value, refRegex))
throw BadURL("URL '%s' contains an invalid branch/tag name", url.url);
if (ref)
throw BadURL("URL '%s' contains multiple branch/tag names", url.url);
ref = value;
}
else if (name == "url") {
if (!std::regex_match(value, urlRegex))
throw BadURL("URL '%s' contains an invalid instance url", url.url);
host_url = value;
}
// FIXME: barf on unsupported attributes
}
bool isImmutable() const override
{
return (bool) rev || narHash;
if (ref && rev)
throw BadURL("URL '%s' contains both a commit hash and a branch/tag name %s %s", url.url, *ref, rev->gitRev());
Input input;
input.attrs.insert_or_assign("type", type());
input.attrs.insert_or_assign("owner", path[0]);
input.attrs.insert_or_assign("repo", path[1]);
if (rev) input.attrs.insert_or_assign("rev", rev->gitRev());
if (ref) input.attrs.insert_or_assign("ref", *ref);
if (host_url) input.attrs.insert_or_assign("url", *host_url);
return input;
}
std::optional<std::string> getRef() const override { return ref; }
std::optional<Hash> getRev() const override { return rev; }
ParsedURL toURL() const override
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != type()) return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "owner" && name != "repo" && name != "ref" && name != "rev" && name != "narHash" && name != "lastModified")
throw Error("unsupported input attribute '%s'", name);
getStrAttr(attrs, "owner");
getStrAttr(attrs, "repo");
Input input;
input.attrs = attrs;
return input;
}
ParsedURL toURL(const Input & input) override
{
auto owner = getStrAttr(input.attrs, "owner");
auto repo = getStrAttr(input.attrs, "repo");
auto ref = input.getRef();
auto rev = input.getRev();
auto path = owner + "/" + repo;
assert(!(ref && rev));
if (ref) path += "/" + *ref;
if (rev) path += "/" + rev->to_string(Base16, false);
return ParsedURL {
.scheme = "github",
.scheme = type(),
.path = path,
};
}
Attrs toAttrsInternal() const override
bool hasAllInfo(const Input & input) override
{
Attrs attrs;
attrs.emplace("owner", owner);
attrs.emplace("repo", repo);
if (ref)
attrs.emplace("ref", *ref);
if (rev)
attrs.emplace("rev", rev->gitRev());
return attrs;
return input.getRev() && maybeGetIntAttr(input.attrs, "lastModified");
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
Input applyOverrides(
const Input & _input,
std::optional<std::string> ref,
std::optional<Hash> rev) override
{
auto rev = this->rev;
auto ref = this->ref.value_or("master");
if (!rev) {
auto url = fmt("https://api.github.com/repos/%s/%s/commits/%s",
owner, repo, ref);
auto json = nlohmann::json::parse(
readFile(
store->toRealPath(
downloadFile(store, url, "source", false).storePath)));
rev = Hash(std::string { json["sha"] }, htSHA1);
debug("HEAD revision for '%s' is %s", url, rev->gitRev());
auto input(_input);
if (rev && ref)
throw BadURL("cannot apply both a commit hash (%s) and a branch/tag name ('%s') to input '%s'",
rev->gitRev(), *ref, input.to_string());
if (rev) {
input.attrs.insert_or_assign("rev", rev->gitRev());
input.attrs.erase("ref");
}
if (ref) {
input.attrs.insert_or_assign("ref", *ref);
input.attrs.erase("rev");
}
return input;
}
auto input = std::make_shared<GitHubInput>(*this);
input->ref = {};
input->rev = *rev;
virtual Hash getRevFromRef(nix::ref<Store> store, const Input & input) const = 0;
virtual std::string getDownloadUrl(const Input & input) const = 0;
std::pair<Tree, Input> fetch(ref<Store> store, const Input & _input) override
{
Input input(_input);
if (!maybeGetStrAttr(input.attrs, "ref")) input.attrs.insert_or_assign("ref", "HEAD");
auto rev = input.getRev();
if (!rev) rev = getRevFromRef(store, input);
input.attrs.erase("ref");
input.attrs.insert_or_assign("rev", rev->gitRev());
Attrs immutableAttrs({
{"type", "git-tarball"},
@ -90,36 +151,25 @@ struct GitHubInput : Input
});
if (auto res = getCache()->lookup(store, immutableAttrs)) {
input.attrs.insert_or_assign("lastModified", getIntAttr(res->first, "lastModified"));
return {
Tree{
.actualPath = store->toRealPath(res->second),
.storePath = std::move(res->second),
.info = TreeInfo {
.lastModified = getIntAttr(res->first, "lastModified"),
},
},
Tree(store->toRealPath(res->second), std::move(res->second)),
input
};
}
// FIXME: use regular /archive URLs instead? api.github.com
// might have stricter rate limits.
auto url = getDownloadUrl(input);
auto url = fmt("https://api.github.com/repos/%s/%s/tarball/%s",
owner, repo, rev->to_string(Base16, false));
auto [tree, lastModified] = downloadTarball(store, url, "source", true);
std::string accessToken = settings.githubAccessToken.get();
if (accessToken != "")
url += "?access_token=" + accessToken;
auto tree = downloadTarball(store, url, "source", true);
input.attrs.insert_or_assign("lastModified", lastModified);
getCache()->add(
store,
immutableAttrs,
{
{"rev", rev->gitRev()},
{"lastModified", *tree.info.lastModified}
{"lastModified", lastModified}
},
tree.storePath,
true);
@ -128,68 +178,96 @@ struct GitHubInput : Input
}
};
struct GitHubInputScheme : InputScheme
struct GitHubInputScheme : GitArchiveInputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
std::string type() override { return "github"; }
Hash getRevFromRef(nix::ref<Store> store, const Input & input) const override
{
if (url.scheme != "github") return nullptr;
auto path = tokenizeString<std::vector<std::string>>(url.path, "/");
auto input = std::make_unique<GitHubInput>();
if (path.size() == 2) {
} else if (path.size() == 3) {
if (std::regex_match(path[2], revRegex))
input->rev = Hash(path[2], htSHA1);
else if (std::regex_match(path[2], refRegex))
input->ref = path[2];
else
throw BadURL("in GitHub URL '%s', '%s' is not a commit hash or branch/tag name", url.url, path[2]);
} else
throw BadURL("GitHub URL '%s' is invalid", url.url);
for (auto &[name, value] : url.query) {
if (name == "rev") {
if (input->rev)
throw BadURL("GitHub URL '%s' contains multiple commit hashes", url.url);
input->rev = Hash(value, htSHA1);
}
else if (name == "ref") {
if (!std::regex_match(value, refRegex))
throw BadURL("GitHub URL '%s' contains an invalid branch/tag name", url.url);
if (input->ref)
throw BadURL("GitHub URL '%s' contains multiple branch/tag names", url.url);
input->ref = value;
}
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("github.com");
auto url = fmt("https://api.%s/repos/%s/%s/commits/%s", // FIXME: check
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo"), *input.getRef());
auto json = nlohmann::json::parse(
readFile(
store->toRealPath(
downloadFile(store, url, "source", false).storePath)));
auto rev = Hash(std::string { json["sha"] }, htSHA1);
debug("HEAD revision for '%s' is %s", url, rev.gitRev());
return rev;
}
if (input->ref && input->rev)
throw BadURL("GitHub URL '%s' contains both a commit hash and a branch/tag name", url.url);
input->owner = path[0];
input->repo = path[1];
return input;
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) override
std::string getDownloadUrl(const Input & input) const override
{
if (maybeGetStrAttr(attrs, "type") != "github") return {};
// FIXME: use regular /archive URLs instead? api.github.com
// might have stricter rate limits.
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("github.com");
auto url = fmt("https://api.%s/repos/%s/%s/tarball/%s", // FIXME: check if this is correct for self hosted instances
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo"),
input.getRev()->to_string(Base16, false));
for (auto & [name, value] : attrs)
if (name != "type" && name != "owner" && name != "repo" && name != "ref" && name != "rev")
throw Error("unsupported GitHub input attribute '%s'", name);
std::string accessToken = settings.githubAccessToken.get();
if (accessToken != "")
url += "?access_token=" + accessToken;
auto input = std::make_unique<GitHubInput>();
input->owner = getStrAttr(attrs, "owner");
input->repo = getStrAttr(attrs, "repo");
input->ref = maybeGetStrAttr(attrs, "ref");
if (auto rev = maybeGetStrAttr(attrs, "rev"))
input->rev = Hash(*rev, htSHA1);
return input;
return url;
}
void clone(const Input & input, const Path & destDir) override
{
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("github.com");
Input::fromURL(fmt("git+ssh://git@%s/%s/%s.git",
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo")))
.applyOverrides(input.getRef().value_or("HEAD"), input.getRev())
.clone(destDir);
}
};
struct GitLabInputScheme : GitArchiveInputScheme
{
std::string type() override { return "gitlab"; }
Hash getRevFromRef(nix::ref<Store> store, const Input & input) const override
{
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("gitlab.com");
auto url = fmt("https://%s/api/v4/projects/%s%%2F%s/repository/commits?ref_name=%s",
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo"), *input.getRef());
auto json = nlohmann::json::parse(
readFile(
store->toRealPath(
downloadFile(store, url, "source", false).storePath)));
auto rev = Hash(std::string(json[0]["id"]), htSHA1);
debug("HEAD revision for '%s' is %s", url, rev.gitRev());
return rev;
}
std::string getDownloadUrl(const Input & input) const override
{
// FIXME: This endpoint has a rate limit threshold of 5 requests per minute
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("gitlab.com");
auto url = fmt("https://%s/api/v4/projects/%s%%2F%s/repository/archive.tar.gz?sha=%s",
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo"),
input.getRev()->to_string(Base16, false));
/* # FIXME: add privat token auth (`curl --header "PRIVATE-TOKEN: <your_access_token>"`)
std::string accessToken = settings.githubAccessToken.get();
if (accessToken != "")
url += "?access_token=" + accessToken;*/
return url;
}
void clone(const Input & input, const Path & destDir) override
{
auto host_url = maybeGetStrAttr(input.attrs, "url").value_or("gitlab.com");
// FIXME: get username somewhere
Input::fromURL(fmt("git+ssh://git@%s/%s/%s.git",
host_url, getStrAttr(input.attrs, "owner"), getStrAttr(input.attrs, "repo")))
.applyOverrides(input.getRef().value_or("HEAD"), input.getRev())
.clone(destDir);
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<GitHubInputScheme>()); });
static auto r2 = OnStartup([] { registerInputScheme(std::make_unique<GitLabInputScheme>()); });
}

104
src/libfetchers/indirect.cc Normal file
View file

@ -0,0 +1,104 @@
#include "fetchers.hh"
namespace nix::fetchers {
std::regex flakeRegex("[a-zA-Z][a-zA-Z0-9_-]*", std::regex::ECMAScript);
struct IndirectInputScheme : InputScheme
{
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "flake") return {};
auto path = tokenizeString<std::vector<std::string>>(url.path, "/");
std::optional<Hash> rev;
std::optional<std::string> ref;
if (path.size() == 1) {
} else if (path.size() == 2) {
if (std::regex_match(path[1], revRegex))
rev = Hash(path[1], htSHA1);
else if (std::regex_match(path[1], refRegex))
ref = path[1];
else
throw BadURL("in flake URL '%s', '%s' is not a commit hash or branch/tag name", url.url, path[1]);
} else if (path.size() == 3) {
if (!std::regex_match(path[1], refRegex))
throw BadURL("in flake URL '%s', '%s' is not a branch/tag name", url.url, path[1]);
ref = path[1];
if (!std::regex_match(path[2], revRegex))
throw BadURL("in flake URL '%s', '%s' is not a commit hash", url.url, path[2]);
rev = Hash(path[2], htSHA1);
} else
throw BadURL("GitHub URL '%s' is invalid", url.url);
std::string id = path[0];
if (!std::regex_match(id, flakeRegex))
throw BadURL("'%s' is not a valid flake ID", id);
// FIXME: forbid query params?
Input input;
input.direct = false;
input.attrs.insert_or_assign("type", "indirect");
input.attrs.insert_or_assign("id", id);
if (rev) input.attrs.insert_or_assign("rev", rev->gitRev());
if (ref) input.attrs.insert_or_assign("ref", *ref);
return input;
}
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "indirect") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "id" && name != "ref" && name != "rev" && name != "narHash")
throw Error("unsupported indirect input attribute '%s'", name);
auto id = getStrAttr(attrs, "id");
if (!std::regex_match(id, flakeRegex))
throw BadURL("'%s' is not a valid flake ID", id);
Input input;
input.direct = false;
input.attrs = attrs;
return input;
}
ParsedURL toURL(const Input & input) override
{
ParsedURL url;
url.scheme = "flake";
url.path = getStrAttr(input.attrs, "id");
if (auto ref = input.getRef()) { url.path += '/'; url.path += *ref; };
if (auto rev = input.getRev()) { url.path += '/'; url.path += rev->gitRev(); };
return url;
}
bool hasAllInfo(const Input & input) override
{
return false;
}
Input applyOverrides(
const Input & _input,
std::optional<std::string> ref,
std::optional<Hash> rev) override
{
auto input(_input);
if (rev) input.attrs.insert_or_assign("rev", rev->gitRev());
if (ref) input.attrs.insert_or_assign("ref", *ref);
return input;
}
std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) override
{
throw Error("indirect input '%s' cannot be fetched directly", input.to_string());
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<IndirectInputScheme>()); });
}

234
src/libfetchers/mercurial.cc
View file

@ -10,76 +10,124 @@ using namespace std::string_literals;
namespace nix::fetchers {
struct MercurialInput : Input
struct MercurialInputScheme : InputScheme
{
ParsedURL url;
std::optional<std::string> ref;
std::optional<Hash> rev;
MercurialInput(const ParsedURL & url) : url(url)
{ }
std::string type() const override { return "hg"; }
bool operator ==(const Input & other) const override
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
auto other2 = dynamic_cast<const MercurialInput *>(&other);
return
other2
&& url == other2->url
&& rev == other2->rev
&& ref == other2->ref;
if (url.scheme != "hg+http" &&
url.scheme != "hg+https" &&
url.scheme != "hg+ssh" &&
url.scheme != "hg+file") return {};
auto url2(url);
url2.scheme = std::string(url2.scheme, 3);
url2.query.clear();
Attrs attrs;
attrs.emplace("type", "hg");
for (auto &[name, value] : url.query) {
if (name == "rev" || name == "ref")
attrs.emplace(name, value);
else
url2.query.emplace(name, value);
}
bool isImmutable() const override
{
return (bool) rev || narHash;
attrs.emplace("url", url2.to_string());
return inputFromAttrs(attrs);
}
std::optional<std::string> getRef() const override { return ref; }
std::optional<Hash> getRev() const override { return rev; }
ParsedURL toURL() const override
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
ParsedURL url2(url);
url2.scheme = "hg+" + url2.scheme;
if (rev) url2.query.insert_or_assign("rev", rev->gitRev());
if (ref) url2.query.insert_or_assign("ref", *ref);
if (maybeGetStrAttr(attrs, "type") != "hg") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "revCount" && name != "narHash")
throw Error("unsupported Mercurial input attribute '%s'", name);
parseURL(getStrAttr(attrs, "url"));
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (!std::regex_match(*ref, refRegex))
throw BadURL("invalid Mercurial branch/tag name '%s'", *ref);
}
Input input;
input.attrs = attrs;
return input;
}
ParsedURL toURL(const Input & input) override
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
url.scheme = "hg+" + url.scheme;
if (auto rev = input.getRev()) url.query.insert_or_assign("rev", rev->gitRev());
if (auto ref = input.getRef()) url.query.insert_or_assign("ref", *ref);
return url;
}
Attrs toAttrsInternal() const override
bool hasAllInfo(const Input & input) override
{
Attrs attrs;
attrs.emplace("url", url.to_string());
if (ref)
attrs.emplace("ref", *ref);
if (rev)
attrs.emplace("rev", rev->gitRev());
return attrs;
// FIXME: ugly, need to distinguish between dirty and clean
// default trees.
return input.getRef() == "default" || maybeGetIntAttr(input.attrs, "revCount");
}
std::pair<bool, std::string> getActualUrl() const
Input applyOverrides(
const Input & input,
std::optional<std::string> ref,
std::optional<Hash> rev) override
{
auto res(input);
if (rev) res.attrs.insert_or_assign("rev", rev->gitRev());
if (ref) res.attrs.insert_or_assign("ref", *ref);
return res;
}
std::optional<Path> getSourcePath(const Input & input) override
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
if (url.scheme == "file" && !input.getRef() && !input.getRev())
return url.path;
return {};
}
void markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg) override
{
auto sourcePath = getSourcePath(input);
assert(sourcePath);
// FIXME: shut up if file is already tracked.
runProgram("hg", true,
{ "add", *sourcePath + "/" + std::string(file) });
if (commitMsg)
runProgram("hg", true,
{ "commit", *sourcePath + "/" + std::string(file), "-m", *commitMsg });
}
std::pair<bool, std::string> getActualUrl(const Input & input) const
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
bool isLocal = url.scheme == "file";
return {isLocal, isLocal ? url.path : url.base};
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
std::pair<Tree, Input> fetch(ref<Store> store, const Input & _input) override
{
auto name = "source";
auto input = std::make_shared<MercurialInput>(*this);
Input input(_input);
auto [isLocal, actualUrl_] = getActualUrl();
auto [isLocal, actualUrl_] = getActualUrl(input);
auto actualUrl = actualUrl_; // work around clang bug
// FIXME: return lastModified.
// FIXME: don't clone local repositories.
if (!input->ref && !input->rev && isLocal && pathExists(actualUrl + "/.hg")) {
if (!input.getRef() && !input.getRev() && isLocal && pathExists(actualUrl + "/.hg")) {
bool clean = runProgram("hg", true, { "status", "-R", actualUrl, "--modified", "--added", "--removed" }) == "";
@ -94,7 +142,7 @@ struct MercurialInput : Input
if (settings.warnDirty)
warn("Mercurial tree '%s' is unclean", actualUrl);
input->ref = chomp(runProgram("hg", true, { "branch", "-R", actualUrl }));
input.attrs.insert_or_assign("ref", chomp(runProgram("hg", true, { "branch", "-R", actualUrl })));
auto files = tokenizeString<std::set<std::string>>(
runProgram("hg", true, { "status", "-R", actualUrl, "--clean", "--modified", "--added", "--no-status", "--print0" }), "\0"s);
@ -116,60 +164,54 @@ struct MercurialInput : Input
auto storePath = store->addToStore("source", actualUrl, FileIngestionMethod::Recursive, htSHA256, filter);
return {Tree {
.actualPath = store->printStorePath(storePath),
.storePath = std::move(storePath),
}, input};
return {
Tree(store->printStorePath(storePath), std::move(storePath)),
input
};
}
}
if (!input->ref) input->ref = "default";
if (!input.getRef()) input.attrs.insert_or_assign("ref", "default");
auto getImmutableAttrs = [&]()
{
return Attrs({
{"type", "hg"},
{"name", name},
{"rev", input->rev->gitRev()},
{"rev", input.getRev()->gitRev()},
});
};
auto makeResult = [&](const Attrs & infoAttrs, StorePath && storePath)
-> std::pair<Tree, std::shared_ptr<const Input>>
-> std::pair<Tree, Input>
{
assert(input->rev);
assert(!rev || rev == input->rev);
assert(input.getRev());
assert(!_input.getRev() || _input.getRev() == input.getRev());
input.attrs.insert_or_assign("revCount", getIntAttr(infoAttrs, "revCount"));
return {
Tree{
.actualPath = store->toRealPath(storePath),
.storePath = std::move(storePath),
.info = TreeInfo {
.revCount = getIntAttr(infoAttrs, "revCount"),
},
},
Tree(store->toRealPath(storePath), std::move(storePath)),
input
};
};
if (input->rev) {
if (input.getRev()) {
if (auto res = getCache()->lookup(store, getImmutableAttrs()))
return makeResult(res->first, std::move(res->second));
}
assert(input->rev || input->ref);
auto revOrRef = input->rev ? input->rev->gitRev() : *input->ref;
auto revOrRef = input.getRev() ? input.getRev()->gitRev() : *input.getRef();
Attrs mutableAttrs({
{"type", "hg"},
{"name", name},
{"url", actualUrl},
{"ref", *input->ref},
{"ref", *input.getRef()},
});
if (auto res = getCache()->lookup(store, mutableAttrs)) {
auto rev2 = Hash(getStrAttr(res->first, "rev"), htSHA1);
if (!rev || rev == rev2) {
input->rev = rev2;
if (!input.getRev() || input.getRev() == rev2) {
input.attrs.insert_or_assign("rev", rev2.gitRev());
return makeResult(res->first, std::move(res->second));
}
}
@ -178,10 +220,10 @@ struct MercurialInput : Input
/* If this is a commit hash that we already have, we don't
have to pull again. */
if (!(input->rev
if (!(input.getRev()
&& pathExists(cacheDir)
&& runProgram(
RunOptions("hg", { "log", "-R", cacheDir, "-r", input->rev->gitRev(), "--template", "1" })
RunOptions("hg", { "log", "-R", cacheDir, "-r", input.getRev()->gitRev(), "--template", "1" })
.killStderr(true)).second == "1"))
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Mercurial repository '%s'", actualUrl));
@ -210,9 +252,9 @@ struct MercurialInput : Input
runProgram("hg", true, { "log", "-R", cacheDir, "-r", revOrRef, "--template", "{node} {rev} {branch}" }));
assert(tokens.size() == 3);
input->rev = Hash(tokens[0], htSHA1);
input.attrs.insert_or_assign("rev", Hash(tokens[0], htSHA1).gitRev());
auto revCount = std::stoull(tokens[1]);
input->ref = tokens[2];
input.attrs.insert_or_assign("ref", tokens[2]);
if (auto res = getCache()->lookup(store, getImmutableAttrs()))
return makeResult(res->first, std::move(res->second));
@ -220,18 +262,18 @@ struct MercurialInput : Input
Path tmpDir = createTempDir();
AutoDelete delTmpDir(tmpDir, true);
runProgram("hg", true, { "archive", "-R", cacheDir, "-r", input->rev->gitRev(), tmpDir });
runProgram("hg", true, { "archive", "-R", cacheDir, "-r", input.getRev()->gitRev(), tmpDir });
deletePath(tmpDir + "/.hg_archival.txt");
auto storePath = store->addToStore(name, tmpDir);
Attrs infoAttrs({
{"rev", input->rev->gitRev()},
{"rev", input.getRev()->gitRev()},
{"revCount", (int64_t) revCount},
});
if (!this->rev)
if (!_input.getRev())
getCache()->add(
store,
mutableAttrs,
@ -250,54 +292,6 @@ struct MercurialInput : Input
}
};
struct MercurialInputScheme : InputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "hg+http" &&
url.scheme != "hg+https" &&
url.scheme != "hg+ssh" &&
url.scheme != "hg+file") return nullptr;
auto url2(url);
url2.scheme = std::string(url2.scheme, 3);
url2.query.clear();
Attrs attrs;
attrs.emplace("type", "hg");
for (auto &[name, value] : url.query) {
if (name == "rev" || name == "ref")
attrs.emplace(name, value);
else
url2.query.emplace(name, value);
}
attrs.emplace("url", url2.to_string());
return inputFromAttrs(attrs);
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "hg") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev")
throw Error("unsupported Mercurial input attribute '%s'", name);
auto input = std::make_unique<MercurialInput>(parseURL(getStrAttr(attrs, "url")));
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (!std::regex_match(*ref, refRegex))
throw BadURL("invalid Mercurial branch/tag name '%s'", *ref);
input->ref = *ref;
}
if (auto rev = maybeGetStrAttr(attrs, "rev"))
input->rev = Hash(*rev, htSHA1);
return input;
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<MercurialInputScheme>()); });
}

169
src/libfetchers/path.cc
View file

@ -3,65 +3,86 @@
namespace nix::fetchers {
struct PathInput : Input
struct PathInputScheme : InputScheme
{
Path path;
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "path") return {};
/* Allow the user to pass in "fake" tree info attributes. This is
useful for making a pinned tree work the same as the repository
from which is exported
if (url.authority && *url.authority != "")
throw Error("path URL '%s' should not have an authority ('%s')", url.url, *url.authority);
Input input;
input.attrs.insert_or_assign("type", "path");
input.attrs.insert_or_assign("path", url.path);
for (auto & [name, value] : url.query)
if (name == "rev" || name == "narHash")
input.attrs.insert_or_assign(name, value);
else if (name == "revCount" || name == "lastModified") {
uint64_t n;
if (!string2Int(value, n))
throw Error("path URL '%s' has invalid parameter '%s'", url.to_string(), name);
input.attrs.insert_or_assign(name, n);
}
else
throw Error("path URL '%s' has unsupported parameter '%s'", url.to_string(), name);
return input;
}
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "path") return {};
getStrAttr(attrs, "path");
for (auto & [name, value] : attrs)
/* Allow the user to pass in "fake" tree info
attributes. This is useful for making a pinned tree
work the same as the repository from which is exported
(e.g. path:/nix/store/...-source?lastModified=1585388205&rev=b0c285...). */
std::optional<Hash> rev;
std::optional<uint64_t> revCount;
std::optional<time_t> lastModified;
if (name == "type" || name == "rev" || name == "revCount" || name == "lastModified" || name == "narHash" || name == "path")
// checked in Input::fromAttrs
;
else
throw Error("unsupported path input attribute '%s'", name);
std::string type() const override { return "path"; }
std::optional<Hash> getRev() const override { return rev; }
bool operator ==(const Input & other) const override
{
auto other2 = dynamic_cast<const PathInput *>(&other);
return
other2
&& path == other2->path
&& rev == other2->rev
&& revCount == other2->revCount
&& lastModified == other2->lastModified;
Input input;
input.attrs = attrs;
return input;
}
bool isImmutable() const override
ParsedURL toURL(const Input & input) override
{
return (bool) narHash;
}
ParsedURL toURL() const override
{
auto query = attrsToQuery(toAttrsInternal());
auto query = attrsToQuery(input.attrs);
query.erase("path");
query.erase("type");
return ParsedURL {
.scheme = "path",
.path = path,
.path = getStrAttr(input.attrs, "path"),
.query = query,
};
}
Attrs toAttrsInternal() const override
bool hasAllInfo(const Input & input) override
{
Attrs attrs;
attrs.emplace("path", path);
if (rev)
attrs.emplace("rev", rev->gitRev());
if (revCount)
attrs.emplace("revCount", *revCount);
if (lastModified)
attrs.emplace("lastModified", *lastModified);
return attrs;
return true;
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
std::optional<Path> getSourcePath(const Input & input) override
{
auto input = std::make_shared<PathInput>(*this);
return getStrAttr(input.attrs, "path");
}
void markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg) override
{
// nothing to do
}
std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) override
{
auto path = getStrAttr(input.attrs, "path");
// FIXME: check whether access to 'path' is allowed.
@ -74,73 +95,11 @@ struct PathInput : Input
// FIXME: try to substitute storePath.
storePath = store->addToStore("source", path);
return
{
Tree {
.actualPath = store->toRealPath(*storePath),
.storePath = std::move(*storePath),
.info = TreeInfo {
.revCount = revCount,
.lastModified = lastModified
}
},
return {
Tree(store->toRealPath(*storePath), std::move(*storePath)),
input
};
}
};
struct PathInputScheme : InputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "path") return nullptr;
auto input = std::make_unique<PathInput>();
input->path = url.path;
for (auto & [name, value] : url.query)
if (name == "rev")
input->rev = Hash(value, htSHA1);
else if (name == "revCount") {
uint64_t revCount;
if (!string2Int(value, revCount))
throw Error("path URL '%s' has invalid parameter '%s'", url.to_string(), name);
input->revCount = revCount;
}
else if (name == "lastModified") {
time_t lastModified;
if (!string2Int(value, lastModified))
throw Error("path URL '%s' has invalid parameter '%s'", url.to_string(), name);
input->lastModified = lastModified;
}
else
throw Error("path URL '%s' has unsupported parameter '%s'", url.to_string(), name);
return input;
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "path") return {};
auto input = std::make_unique<PathInput>();
input->path = getStrAttr(attrs, "path");
for (auto & [name, value] : attrs)
if (name == "rev")
input->rev = Hash(getStrAttr(attrs, "rev"), htSHA1);
else if (name == "revCount")
input->revCount = getIntAttr(attrs, "revCount");
else if (name == "lastModified")
input->lastModified = getIntAttr(attrs, "lastModified");
else if (name == "type" || name == "path")
;
else
throw Error("unsupported path input attribute '%s'", name);
return input;
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<PathInputScheme>()); });

212
src/libfetchers/registry.cc Normal file
View file

@ -0,0 +1,212 @@
#include "registry.hh"
#include "fetchers.hh"
#include "util.hh"
#include "globals.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
namespace nix::fetchers {
std::shared_ptr<Registry> Registry::read(
const Path & path, RegistryType type)
{
auto registry = std::make_shared<Registry>(type);
if (!pathExists(path))
return std::make_shared<Registry>(type);
try {
auto json = nlohmann::json::parse(readFile(path));
auto version = json.value("version", 0);
if (version == 2) {
for (auto & i : json["flakes"]) {
auto toAttrs = jsonToAttrs(i["to"]);
Attrs extraAttrs;
auto j = toAttrs.find("dir");
if (j != toAttrs.end()) {
extraAttrs.insert(*j);
toAttrs.erase(j);
}
auto exact = i.find("exact");
registry->entries.push_back(
Entry {
.from = Input::fromAttrs(jsonToAttrs(i["from"])),
.to = Input::fromAttrs(std::move(toAttrs)),
.extraAttrs = extraAttrs,
.exact = exact != i.end() && exact.value()
});
}
}
else
throw Error("flake registry '%s' has unsupported version %d", path, version);
} catch (nlohmann::json::exception & e) {
warn("cannot parse flake registry '%s': %s", path, e.what());
} catch (Error & e) {
warn("cannot read flake registry '%s': %s", path, e.what());
}
return registry;
}
void Registry::write(const Path & path)
{
nlohmann::json arr;
for (auto & entry : entries) {
nlohmann::json obj;
obj["from"] = attrsToJson(entry.from.toAttrs());
obj["to"] = attrsToJson(entry.to.toAttrs());
if (!entry.extraAttrs.empty())
obj["to"].update(attrsToJson(entry.extraAttrs));
if (entry.exact)
obj["exact"] = true;
arr.emplace_back(std::move(obj));
}
nlohmann::json json;
json["version"] = 2;
json["flakes"] = std::move(arr);
createDirs(dirOf(path));
writeFile(path, json.dump(2));
}
void Registry::add(
const Input & from,
const Input & to,
const Attrs & extraAttrs)
{
entries.emplace_back(
Entry {
.from = from,
.to = to,
.extraAttrs = extraAttrs
});
}
void Registry::remove(const Input & input)
{
// FIXME: use C++20 std::erase.
for (auto i = entries.begin(); i != entries.end(); )
if (i->from == input)
i = entries.erase(i);
else
++i;
}
static Path getSystemRegistryPath()
{
return settings.nixConfDir + "/registry.json";
}
static std::shared_ptr<Registry> getSystemRegistry()
{
static auto systemRegistry =
Registry::read(getSystemRegistryPath(), Registry::System);
return systemRegistry;
}
Path getUserRegistryPath()
{
return getHome() + "/.config/nix/registry.json";
}
std::shared_ptr<Registry> getUserRegistry()
{
static auto userRegistry =
Registry::read(getUserRegistryPath(), Registry::User);
return userRegistry;
}
static std::shared_ptr<Registry> flagRegistry =
std::make_shared<Registry>(Registry::Flag);
std::shared_ptr<Registry> getFlagRegistry()
{
return flagRegistry;
}
void overrideRegistry(
const Input & from,
const Input & to,
const Attrs & extraAttrs)
{
flagRegistry->add(from, to, extraAttrs);
}
static std::shared_ptr<Registry> getGlobalRegistry(ref<Store> store)
{
static auto reg = [&]() {
auto path = settings.flakeRegistry.get();
if (!hasPrefix(path, "/")) {
auto storePath = downloadFile(store, path, "flake-registry.json", false).storePath;
if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>())
store2->addPermRoot(storePath, getCacheDir() + "/nix/flake-registry.json", true);
path = store->toRealPath(storePath);
}
return Registry::read(path, Registry::Global);
}();
return reg;
}
Registries getRegistries(ref<Store> store)
{
Registries registries;
registries.push_back(getFlagRegistry());
registries.push_back(getUserRegistry());
registries.push_back(getSystemRegistry());
registries.push_back(getGlobalRegistry(store));
return registries;
}
std::pair<Input, Attrs> lookupInRegistries(
ref<Store> store,
const Input & _input)
{
Attrs extraAttrs;
int n = 0;
Input input(_input);
restart:
n++;
if (n > 100) throw Error("cycle detected in flake registry for '%s'", input.to_string());
for (auto & registry : getRegistries(store)) {
// FIXME: O(n)
for (auto & entry : registry->entries) {
if (entry.exact) {
if (entry.from == input) {
input = entry.to;
extraAttrs = entry.extraAttrs;
goto restart;
}
} else {
if (entry.from.contains(input)) {
input = entry.to.applyOverrides(
!entry.from.getRef() && input.getRef() ? input.getRef() : std::optional<std::string>(),
!entry.from.getRev() && input.getRev() ? input.getRev() : std::optional<Hash>());
extraAttrs = entry.extraAttrs;
goto restart;
}
}
}
}
if (!input.isDirect())
throw Error("cannot find flake '%s' in the flake registries", input.to_string());
debug("looked up '%s' -> '%s'", _input.to_string(), input.to_string());
return {input, extraAttrs};
}
}

64
src/libfetchers/registry.hh Normal file
View file

@ -0,0 +1,64 @@
#pragma once
#include "types.hh"
#include "fetchers.hh"
namespace nix { class Store; }
namespace nix::fetchers {
struct Registry
{
enum RegistryType {
Flag = 0,
User = 1,
System = 2,
Global = 3,
};
RegistryType type;
struct Entry
{
Input from, to;
Attrs extraAttrs;
bool exact = false;
};
std::vector<Entry> entries;
Registry(RegistryType type)
: type(type)
{ }
static std::shared_ptr<Registry> read(
const Path & path, RegistryType type);
void write(const Path & path);
void add(
const Input & from,
const Input & to,
const Attrs & extraAttrs);
void remove(const Input & input);
};
typedef std::vector<std::shared_ptr<Registry>> Registries;
std::shared_ptr<Registry> getUserRegistry();
Path getUserRegistryPath();
Registries getRegistries(ref<Store> store);
void overrideRegistry(
const Input & from,
const Input & to,
const Attrs & extraAttrs);
std::pair<Input, Attrs> lookupInRegistries(
ref<Store> store,
const Input & input);
}

140
src/libfetchers/tarball.cc
View file

@ -105,7 +105,7 @@ DownloadFileResult downloadFile(
};
}
Tree downloadTarball(
std::pair<Tree, time_t> downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,
@ -120,12 +120,9 @@ Tree downloadTarball(
auto cached = getCache()->lookupExpired(store, inAttrs);
if (cached && !cached->expired)
return Tree {
.actualPath = store->toRealPath(cached->storePath),
.storePath = std::move(cached->storePath),
.info = TreeInfo {
.lastModified = getIntAttr(cached->infoAttrs, "lastModified"),
},
return {
Tree(store->toRealPath(cached->storePath), std::move(cached->storePath)),
getIntAttr(cached->infoAttrs, "lastModified")
};
auto res = downloadFile(store, url, name, immutable);
@ -160,117 +157,72 @@ Tree downloadTarball(
*unpackedStorePath,
immutable);
return Tree {
.actualPath = store->toRealPath(*unpackedStorePath),
.storePath = std::move(*unpackedStorePath),
.info = TreeInfo {
.lastModified = lastModified,
},
return {
Tree(store->toRealPath(*unpackedStorePath), std::move(*unpackedStorePath)),
lastModified,
};
}
struct TarballInput : Input
{
ParsedURL url;
std::optional<Hash> hash;
TarballInput(const ParsedURL & url) : url(url)
{ }
std::string type() const override { return "tarball"; }
bool operator ==(const Input & other) const override
{
auto other2 = dynamic_cast<const TarballInput *>(&other);
return
other2
&& to_string() == other2->to_string()
&& hash == other2->hash;
}
bool isImmutable() const override
{
return hash || narHash;
}
ParsedURL toURL() const override
{
auto url2(url);
// NAR hashes are preferred over file hashes since tar/zip files
// don't have a canonical representation.
if (narHash)
url2.query.insert_or_assign("narHash", narHash->to_string(SRI, true));
else if (hash)
url2.query.insert_or_assign("hash", hash->to_string(SRI, true));
return url2;
}
Attrs toAttrsInternal() const override
{
Attrs attrs;
attrs.emplace("url", url.to_string());
if (hash)
attrs.emplace("hash", hash->to_string(SRI, true));
return attrs;
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
{
auto tree = downloadTarball(store, url.to_string(), "source", false);
auto input = std::make_shared<TarballInput>(*this);
input->narHash = store->queryPathInfo(tree.storePath)->narHash;
return {std::move(tree), input};
}
};
struct TarballInputScheme : InputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
std::optional<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "file" && url.scheme != "http" && url.scheme != "https") return nullptr;
if (url.scheme != "file" && url.scheme != "http" && url.scheme != "https") return {};
if (!hasSuffix(url.path, ".zip")
&& !hasSuffix(url.path, ".tar")
&& !hasSuffix(url.path, ".tar.gz")
&& !hasSuffix(url.path, ".tar.xz")
&& !hasSuffix(url.path, ".tar.bz2"))
return nullptr;
auto input = std::make_unique<TarballInput>(url);
auto hash = input->url.query.find("hash");
if (hash != input->url.query.end()) {
// FIXME: require SRI hash.
input->hash = Hash(hash->second);
input->url.query.erase(hash);
}
auto narHash = input->url.query.find("narHash");
if (narHash != input->url.query.end()) {
// FIXME: require SRI hash.
input->narHash = Hash(narHash->second);
input->url.query.erase(narHash);
}
return {};
Input input;
input.attrs.insert_or_assign("type", "tarball");
input.attrs.insert_or_assign("url", url.to_string());
auto narHash = url.query.find("narHash");
if (narHash != url.query.end())
input.attrs.insert_or_assign("narHash", narHash->second);
return input;
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs) override
std::optional<Input> inputFromAttrs(const Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "tarball") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "hash")
if (name != "type" && name != "url" && /* name != "hash" && */ name != "narHash")
throw Error("unsupported tarball input attribute '%s'", name);
auto input = std::make_unique<TarballInput>(parseURL(getStrAttr(attrs, "url")));
if (auto hash = maybeGetStrAttr(attrs, "hash"))
input->hash = newHashAllowEmpty(*hash, {});
Input input;
input.attrs = attrs;
//input.immutable = (bool) maybeGetStrAttr(input.attrs, "hash");
return input;
}
ParsedURL toURL(const Input & input) override
{
auto url = parseURL(getStrAttr(input.attrs, "url"));
// NAR hashes are preferred over file hashes since tar/zip files
// don't have a canonical representation.
if (auto narHash = input.getNarHash())
url.query.insert_or_assign("narHash", narHash->to_string(SRI, true));
/*
else if (auto hash = maybeGetStrAttr(input.attrs, "hash"))
url.query.insert_or_assign("hash", Hash(*hash).to_string(SRI, true));
*/
return url;
}
bool hasAllInfo(const Input & input) override
{
return true;
}
std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) override
{
auto tree = downloadTarball(store, getStrAttr(input.attrs, "url"), "source", false).first;
return {std::move(tree), input};
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<TarballInputScheme>()); });

14
src/libfetchers/tree-info.cc
View file

@ -1,14 +0,0 @@
#include "tree-info.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
namespace nix::fetchers {
StorePath TreeInfo::computeStorePath(Store & store) const
{
assert(narHash);
return store.makeFixedOutputPath(FileIngestionMethod::Recursive, narHash, "source");
}
}

29
src/libfetchers/tree-info.hh
View file

@ -1,29 +0,0 @@
#pragma once
#include "path.hh"
#include "hash.hh"
#include <nlohmann/json_fwd.hpp>
namespace nix { class Store; }
namespace nix::fetchers {
struct TreeInfo
{
Hash narHash;
std::optional<uint64_t> revCount;
std::optional<time_t> lastModified;
bool operator ==(const TreeInfo & other) const
{
return
narHash == other.narHash
&& revCount == other.revCount
&& lastModified == other.lastModified;
}
StorePath computeStorePath(Store & store) const;
};
}

10
src/libmain/common-args.cc
View file

@ -34,9 +34,19 @@ MixCommonArgs::MixCommonArgs(const string & programName)
try {
globalConfig.set(name, value);
} catch (UsageError & e) {
if (!completions)
warn(e.what());
}
}},
.completer = [](size_t index, std::string_view prefix) {
if (index == 0) {
std::map<std::string, Config::SettingInfo> settings;
globalConfig.getSettings(settings);
for (auto & s : settings)
if (hasPrefix(s.first, prefix))
completions->insert(s.first);
}
}
});
addFlag({

3
src/libmain/loggers.cc
View file

@ -1,12 +1,13 @@
#include "loggers.hh"
#include "progress-bar.hh"
#include "util.hh"
namespace nix {
LogFormat defaultLogFormat = LogFormat::raw;
LogFormat parseLogFormat(const std::string & logFormatStr) {
if (logFormatStr == "raw")
if (logFormatStr == "raw" || getEnv("NIX_GET_COMPLETIONS"))
return LogFormat::raw;
else if (logFormatStr == "raw-with-logs")
return LogFormat::rawWithLogs;

6
src/libmain/shared.cc
View file

@ -36,7 +36,7 @@ void printGCWarning()
void printMissing(ref<Store> store, const std::vector<StorePathWithOutputs> & paths, Verbosity lvl)
{
unsigned long long downloadSize, narSize;
uint64_t downloadSize, narSize;
StorePathSet willBuild, willSubstitute, unknown;
store->queryMissing(paths, willBuild, willSubstitute, unknown, downloadSize, narSize);
printMissing(store, willBuild, willSubstitute, unknown, downloadSize, narSize, lvl);
@ -45,7 +45,7 @@ void printMissing(ref<Store> store, const std::vector<StorePathWithOutputs> & pa
void printMissing(ref<Store> store, const StorePathSet & willBuild,
const StorePathSet & willSubstitute, const StorePathSet & unknown,
unsigned long long downloadSize, unsigned long long narSize, Verbosity lvl)
uint64_t downloadSize, uint64_t narSize, Verbosity lvl)
{
if (!willBuild.empty()) {
if (willBuild.size() == 1)
@ -384,7 +384,7 @@ RunPager::~RunPager()
}
string showBytes(unsigned long long bytes)
string showBytes(uint64_t bytes)
{
return (format("%.2f MiB") % (bytes / (1024.0 * 1024.0))).str();
}

4
src/libmain/shared.hh
View file

@ -47,7 +47,7 @@ void printMissing(
void printMissing(ref<Store> store, const StorePathSet & willBuild,
const StorePathSet & willSubstitute, const StorePathSet & unknown,
unsigned long long downloadSize, unsigned long long narSize, Verbosity lvl = lvlInfo);
uint64_t downloadSize, uint64_t narSize, Verbosity lvl = lvlInfo);
string getArg(const string & opt,
Strings::iterator & i, const Strings::iterator & end);
@ -110,7 +110,7 @@ extern volatile ::sig_atomic_t blockInt;
/* GC helpers. */
string showBytes(unsigned long long bytes);
string showBytes(uint64_t bytes);
struct GCResults;

6
src/libstore/binary-cache-store.cc
View file

@ -178,7 +178,7 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, Source & narSource
auto [fileHash, fileSize] = fileHashSink.finish();
narInfo->fileHash = fileHash;
narInfo->fileSize = fileSize;
narInfo->url = "nar/" + narInfo->fileHash.to_string(Base32, false) + ".nar"
narInfo->url = "nar/" + narInfo->fileHash->to_string(Base32, false) + ".nar"
+ (compression == "xz" ? ".xz" :
compression == "bzip2" ? ".bz2" :
compression == "br" ? ".br" :
@ -372,7 +372,7 @@ StorePath BinaryCacheStore::addToStore(const string & name, const Path & srcPath
method for very large paths, but `copyPath' is mainly used for
small files. */
StringSink sink;
Hash h;
std::optional<Hash> h;
if (method == FileIngestionMethod::Recursive) {
dumpPath(srcPath, sink, filter);
h = hashString(hashAlgo, *sink.s);
@ -382,7 +382,7 @@ StorePath BinaryCacheStore::addToStore(const string & name, const Path & srcPath
h = hashString(hashAlgo, s);
}
ValidPathInfo info(makeFixedOutputPath(method, h, name));
ValidPathInfo info(makeFixedOutputPath(method, *h, name));
auto source = StringSource { *sink.s };
addToStore(info, source, repair, CheckSigs);

139
src/libstore/build.cc
View file

@ -297,7 +297,7 @@ public:
GoalPtr makeDerivationGoal(const StorePath & drvPath, const StringSet & wantedOutputs, BuildMode buildMode = bmNormal);
std::shared_ptr<DerivationGoal> makeBasicDerivationGoal(const StorePath & drvPath,
const BasicDerivation & drv, BuildMode buildMode = bmNormal);
GoalPtr makeSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair);
GoalPtr makeSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
/* Remove a dead goal. */
void removeGoal(GoalPtr goal);
@ -1047,7 +1047,7 @@ DerivationGoal::DerivationGoal(const StorePath & drvPath, const BasicDerivation
{
this->drv = std::make_unique<BasicDerivation>(BasicDerivation(drv));
state = &DerivationGoal::haveDerivation;
name = fmt("building of %s", worker.store.showPaths(drv.outputPaths()));
name = fmt("building of %s", worker.store.showPaths(drv.outputPaths(worker.store)));
trace("created");
mcExpectedBuilds = std::make_unique<MaintainCount<uint64_t>>(worker.expectedBuilds);
@ -1182,7 +1182,7 @@ void DerivationGoal::haveDerivation()
retrySubstitution = false;
for (auto & i : drv->outputs)
worker.store.addTempRoot(i.second.path);
worker.store.addTempRoot(i.second.path(worker.store, drv->name));
/* Check what outputs paths are not already valid. */
auto invalidOutputs = checkPathValidity(false, buildMode == bmRepair);
@ -1206,7 +1206,7 @@ void DerivationGoal::haveDerivation()
them. */
if (settings.useSubstitutes && parsedDrv->substitutesAllowed())
for (auto & i : invalidOutputs)
addWaitee(worker.makeSubstitutionGoal(i, buildMode == bmRepair ? Repair : NoRepair));
addWaitee(worker.makeSubstitutionGoal(i, buildMode == bmRepair ? Repair : NoRepair, getDerivationCA(*drv)));
if (waitees.empty()) /* to prevent hang (no wake-up event) */
outputsSubstituted();
@ -1290,12 +1290,12 @@ void DerivationGoal::repairClosure()
StorePathSet outputClosure;
for (auto & i : drv->outputs) {
if (!wantOutput(i.first, wantedOutputs)) continue;
worker.store.computeFSClosure(i.second.path, outputClosure);
worker.store.computeFSClosure(i.second.path(worker.store, drv->name), outputClosure);
}
/* Filter out our own outputs (which we have already checked). */
for (auto & i : drv->outputs)
outputClosure.erase(i.second.path);
outputClosure.erase(i.second.path(worker.store, drv->name));
/* Get all dependencies of this derivation so that we know which
derivation is responsible for which path in the output
@ -1307,7 +1307,7 @@ void DerivationGoal::repairClosure()
if (i.isDerivation()) {
Derivation drv = worker.store.derivationFromPath(i);
for (auto & j : drv.outputs)
outputsToDrv.insert_or_assign(j.second.path, i);
outputsToDrv.insert_or_assign(j.second.path(worker.store, drv.name), i);
}
/* Check each path (slow!). */
@ -1379,7 +1379,7 @@ void DerivationGoal::inputsRealised()
for (auto & j : i.second) {
auto k = inDrv.outputs.find(j);
if (k != inDrv.outputs.end())
worker.store.computeFSClosure(k->second.path, inputPaths);
worker.store.computeFSClosure(k->second.path(worker.store, inDrv.name), inputPaths);
else
throw Error(
"derivation '%s' requires non-existent output '%s' from input derivation '%s'",
@ -1432,7 +1432,7 @@ void DerivationGoal::tryToBuild()
goal can start a build, and if not, the main loop will sleep a
few seconds and then retry this goal. */
PathSet lockFiles;
for (auto & outPath : drv->outputPaths())
for (auto & outPath : drv->outputPaths(worker.store))
lockFiles.insert(worker.store.Store::toRealPath(outPath));
if (!outputLocks.lockPaths(lockFiles, "", false)) {
@ -1460,16 +1460,16 @@ void DerivationGoal::tryToBuild()
return;
}
missingPaths = drv->outputPaths();
missingPaths = drv->outputPaths(worker.store);
if (buildMode != bmCheck)
for (auto & i : validPaths) missingPaths.erase(i);
/* If any of the outputs already exist but are not valid, delete
them. */
for (auto & i : drv->outputs) {
if (worker.store.isValidPath(i.second.path)) continue;
debug("removing invalid path '%s'", worker.store.printStorePath(i.second.path));
deletePath(worker.store.Store::toRealPath(i.second.path));
if (worker.store.isValidPath(i.second.path(worker.store, drv->name))) continue;
debug("removing invalid path '%s'", worker.store.printStorePath(i.second.path(worker.store, drv->name)));
deletePath(worker.store.Store::toRealPath(i.second.path(worker.store, drv->name)));
}
/* Don't do a remote build if the derivation has the attribute
@ -1646,13 +1646,13 @@ void DerivationGoal::buildDone()
So instead, check if the disk is (nearly) full now. If
so, we don't mark this build as a permanent failure. */
#if HAVE_STATVFS
unsigned long long required = 8ULL * 1024 * 1024; // FIXME: make configurable
uint64_t required = 8ULL * 1024 * 1024; // FIXME: make configurable
struct statvfs st;
if (statvfs(worker.store.realStoreDir.c_str(), &st) == 0 &&
(unsigned long long) st.f_bavail * st.f_bsize < required)
(uint64_t) st.f_bavail * st.f_bsize < required)
diskFull = true;
if (statvfs(tmpDir.c_str(), &st) == 0 &&
(unsigned long long) st.f_bavail * st.f_bsize < required)
(uint64_t) st.f_bavail * st.f_bsize < required)
diskFull = true;
#endif
@ -1692,7 +1692,7 @@ void DerivationGoal::buildDone()
fmt("running post-build-hook '%s'", settings.postBuildHook),
Logger::Fields{worker.store.printStorePath(drvPath)});
PushActivity pact(act.id);
auto outputPaths = drv->outputPaths();
auto outputPaths = drv->outputPaths(worker.store);
std::map<std::string, std::string> hookEnvironment = getEnv();
hookEnvironment.emplace("DRV_PATH", worker.store.printStorePath(drvPath));
@ -1920,7 +1920,7 @@ StorePathSet DerivationGoal::exportReferences(const StorePathSet & storePaths)
if (j.isDerivation()) {
Derivation drv = worker.store.derivationFromPath(j);
for (auto & k : drv.outputs)
worker.store.computeFSClosure(k.second.path, paths);
worker.store.computeFSClosure(k.second.path(worker.store, drv.name), paths);
}
}
@ -2015,7 +2015,7 @@ void DerivationGoal::startBuilder()
/* Substitute output placeholders with the actual output paths. */
for (auto & output : drv->outputs)
inputRewrites[hashPlaceholder(output.first)] = worker.store.printStorePath(output.second.path);
inputRewrites[hashPlaceholder(output.first)] = worker.store.printStorePath(output.second.path(worker.store, drv->name));
/* Construct the environment passed to the builder. */
initEnv();
@ -2200,7 +2200,7 @@ void DerivationGoal::startBuilder()
(typically the dependencies of /bin/sh). Throw them
out. */
for (auto & i : drv->outputs)
dirsInChroot.erase(worker.store.printStorePath(i.second.path));
dirsInChroot.erase(worker.store.printStorePath(i.second.path(worker.store, drv->name)));
#elif __APPLE__
/* We don't really have any parent prep work to do (yet?)
@ -2613,7 +2613,7 @@ void DerivationGoal::writeStructuredAttrs()
/* Add an "outputs" object containing the output paths. */
nlohmann::json outputs;
for (auto & i : drv->outputs)
outputs[i.first] = rewriteStrings(worker.store.printStorePath(i.second.path), inputRewrites);
outputs[i.first] = rewriteStrings(worker.store.printStorePath(i.second.path(worker.store, drv->name)), inputRewrites);
json["outputs"] = outputs;
/* Handle exportReferencesGraph. */
@ -2774,7 +2774,7 @@ struct RestrictedStore : public LocalFSStore
goal.addDependency(info.path);
}
StorePath addToStoreFromDump(const string & dump, const string & name,
StorePath addToStoreFromDump(Source & dump, const string & name,
FileIngestionMethod method = FileIngestionMethod::Recursive, HashType hashAlgo = htSHA256, RepairFlag repair = NoRepair) override
{
auto path = next->addToStoreFromDump(dump, name, method, hashAlgo, repair);
@ -2817,7 +2817,7 @@ struct RestrictedStore : public LocalFSStore
auto drv = derivationFromPath(path.path);
for (auto & output : drv.outputs)
if (wantOutput(output.first, path.outputs))
newPaths.insert(output.second.path);
newPaths.insert(output.second.path(*this, drv.name));
} else if (!goal.isAllowed(path.path))
throw InvalidPath("cannot build unknown path '%s' in recursive Nix", printStorePath(path.path));
}
@ -2851,7 +2851,7 @@ struct RestrictedStore : public LocalFSStore
void queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize) override
uint64_t & downloadSize, uint64_t & narSize) override
{
/* This is slightly impure since it leaks information to the
client about what paths will be built/substituted or are
@ -3579,7 +3579,7 @@ StorePathSet parseReferenceSpecifiers(Store & store, const BasicDerivation & drv
if (store.isStorePath(i))
result.insert(store.parseStorePath(i));
else if (drv.outputs.count(i))
result.insert(drv.outputs.find(i)->second.path);
result.insert(drv.outputs.find(i)->second.path(store, drv.name));
else throw BuildError("derivation contains an illegal reference specifier '%s'", i);
}
return result;
@ -3617,7 +3617,7 @@ void DerivationGoal::registerOutputs()
if (hook) {
bool allValid = true;
for (auto & i : drv->outputs)
if (!worker.store.isValidPath(i.second.path)) allValid = false;
if (!worker.store.isValidPath(i.second.path(worker.store, drv->name))) allValid = false;
if (allValid) return;
}
@ -3638,23 +3638,23 @@ void DerivationGoal::registerOutputs()
Nix calls. */
StorePathSet referenceablePaths;
for (auto & p : inputPaths) referenceablePaths.insert(p);
for (auto & i : drv->outputs) referenceablePaths.insert(i.second.path);
for (auto & i : drv->outputs) referenceablePaths.insert(i.second.path(worker.store, drv->name));
for (auto & p : addedPaths) referenceablePaths.insert(p);
/* Check whether the output paths were created, and grep each
output path to determine what other paths it references. Also make all
output paths read-only. */
for (auto & i : drv->outputs) {
auto path = worker.store.printStorePath(i.second.path);
if (!missingPaths.count(i.second.path)) continue;
auto path = worker.store.printStorePath(i.second.path(worker.store, drv->name));
if (!missingPaths.count(i.second.path(worker.store, drv->name))) continue;
Path actualPath = path;
if (needsHashRewrite()) {
auto r = redirectedOutputs.find(i.second.path);
auto r = redirectedOutputs.find(i.second.path(worker.store, drv->name));
if (r != redirectedOutputs.end()) {
auto redirected = worker.store.Store::toRealPath(r->second);
if (buildMode == bmRepair
&& redirectedBadOutputs.count(i.second.path)
&& redirectedBadOutputs.count(i.second.path(worker.store, drv->name))
&& pathExists(redirected))
replaceValidPath(path, redirected);
if (buildMode == bmCheck)
@ -3723,7 +3723,9 @@ void DerivationGoal::registerOutputs()
if (fixedOutput) {
if (i.second.hash->method == FileIngestionMethod::Flat) {
FixedOutputHash outputHash = std::get<DerivationOutputFixed>(i.second.output).hash;
if (outputHash.method == FileIngestionMethod::Flat) {
/* The output path should be a regular file without execute permission. */
if (!S_ISREG(st.st_mode) || (st.st_mode & S_IXUSR) != 0)
throw BuildError(
@ -3734,13 +3736,13 @@ void DerivationGoal::registerOutputs()
/* Check the hash. In hash mode, move the path produced by
the derivation to its content-addressed location. */
Hash h2 = i.second.hash->method == FileIngestionMethod::Recursive
? hashPath(*i.second.hash->hash.type, actualPath).first
: hashFile(*i.second.hash->hash.type, actualPath);
Hash h2 = outputHash.method == FileIngestionMethod::Recursive
? hashPath(outputHash.hash.type, actualPath).first
: hashFile(outputHash.hash.type, actualPath);
auto dest = worker.store.makeFixedOutputPath(i.second.hash->method, h2, i.second.path.name());
auto dest = worker.store.makeFixedOutputPath(outputHash.method, h2, i.second.path(worker.store, drv->name).name());
if (i.second.hash->hash != h2) {
if (outputHash.hash != h2) {
/* Throw an error after registering the path as
valid. */
@ -3748,7 +3750,7 @@ void DerivationGoal::registerOutputs()
delayedException = std::make_exception_ptr(
BuildError("hash mismatch in fixed-output derivation '%s':\n wanted: %s\n got: %s",
worker.store.printStorePath(dest),
i.second.hash->hash.to_string(SRI, true),
outputHash.hash.to_string(SRI, true),
h2.to_string(SRI, true)));
Path actualDest = worker.store.Store::toRealPath(dest);
@ -3770,7 +3772,7 @@ void DerivationGoal::registerOutputs()
assert(worker.store.parseStorePath(path) == dest);
ca = FixedOutputHash {
.method = i.second.hash->method,
.method = outputHash.method,
.hash = h2,
};
}
@ -3785,8 +3787,10 @@ void DerivationGoal::registerOutputs()
time. The hash is stored in the database so that we can
verify later on whether nobody has messed with the store. */
debug("scanning for references inside '%1%'", path);
HashResult hash;
auto references = worker.store.parseStorePathSet(scanForReferences(actualPath, worker.store.printStorePathSet(referenceablePaths), hash));
// HashResult hash;
auto pathSetAndHash = scanForReferences(actualPath, worker.store.printStorePathSet(referenceablePaths));
auto references = worker.store.parseStorePathSet(pathSetAndHash.first);
HashResult hash = pathSetAndHash.second;
if (buildMode == bmCheck) {
if (!worker.store.isValidPath(worker.store.parseStorePath(path))) continue;
@ -3894,7 +3898,7 @@ void DerivationGoal::registerOutputs()
/* If this is the first round of several, then move the output out of the way. */
if (nrRounds > 1 && curRound == 1 && curRound < nrRounds && keepPreviousRound) {
for (auto & i : drv->outputs) {
auto path = worker.store.printStorePath(i.second.path);
auto path = worker.store.printStorePath(i.second.path(worker.store, drv->name));
Path prev = path + checkSuffix;
deletePath(prev);
Path dst = path + checkSuffix;
@ -3912,7 +3916,7 @@ void DerivationGoal::registerOutputs()
if the result was not determistic? */
if (curRound == nrRounds) {
for (auto & i : drv->outputs) {
Path prev = worker.store.printStorePath(i.second.path) + checkSuffix;
Path prev = worker.store.printStorePath(i.second.path(worker.store, drv->name)) + checkSuffix;
deletePath(prev);
}
}
@ -4213,9 +4217,9 @@ StorePathSet DerivationGoal::checkPathValidity(bool returnValid, bool checkHash)
for (auto & i : drv->outputs) {
if (!wantOutput(i.first, wantedOutputs)) continue;
bool good =
worker.store.isValidPath(i.second.path) &&
(!checkHash || worker.pathContentsGood(i.second.path));
if (good == returnValid) result.insert(i.second.path);
worker.store.isValidPath(i.second.path(worker.store, drv->name)) &&
(!checkHash || worker.pathContentsGood(i.second.path(worker.store, drv->name)));
if (good == returnValid) result.insert(i.second.path(worker.store, drv->name));
}
return result;
}
@ -4272,6 +4276,10 @@ private:
/* The store path that should be realised through a substitute. */
StorePath storePath;
/* The path the substituter refers to the path as. This will be
* different when the stores have different names. */
std::optional<StorePath> subPath;
/* The remaining substituters. */
std::list<ref<Store>> subs;
@ -4305,8 +4313,11 @@ private:
typedef void (SubstitutionGoal::*GoalState)();
GoalState state;
/* Content address for recomputing store path */
std::optional<ContentAddress> ca;
public:
SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair);
SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
~SubstitutionGoal();
void timedOut(Error && ex) override { abort(); };
@ -4336,10 +4347,11 @@ public:
};
SubstitutionGoal::SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair)
SubstitutionGoal::SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair, std::optional<ContentAddress> ca)
: Goal(worker)
, storePath(storePath)
, repair(repair)
, ca(ca)
{
state = &SubstitutionGoal::init;
name = fmt("substitution of '%s'", worker.store.printStorePath(this->storePath));
@ -4414,14 +4426,18 @@ void SubstitutionGoal::tryNext()
sub = subs.front();
subs.pop_front();
if (sub->storeDir != worker.store.storeDir) {
if (ca) {
subPath = sub->makeFixedOutputPathFromCA(storePath.name(), *ca);
if (sub->storeDir == worker.store.storeDir)
assert(subPath == storePath);
} else if (sub->storeDir != worker.store.storeDir) {
tryNext();
return;
}
try {
// FIXME: make async
info = sub->queryPathInfo(storePath);
info = sub->queryPathInfo(subPath ? *subPath : storePath);
} catch (InvalidPath &) {
tryNext();
return;
@ -4440,6 +4456,19 @@ void SubstitutionGoal::tryNext()
throw;
}
if (info->path != storePath) {
if (info->isContentAddressed(*sub) && info->references.empty()) {
auto info2 = std::make_shared<ValidPathInfo>(*info);
info2->path = storePath;
info = info2;
} else {
printError("asked '%s' for '%s' but got '%s'",
sub->getUri(), worker.store.printStorePath(storePath), sub->printStorePath(info->path));
tryNext();
return;
}
}
/* Update the total expected download size. */
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(info);
@ -4529,7 +4558,7 @@ void SubstitutionGoal::tryToRun()
PushActivity pact(act.id);
copyStorePath(ref<Store>(sub), ref<Store>(worker.store.shared_from_this()),
storePath, repair, sub->isTrusted ? NoCheckSigs : CheckSigs);
subPath ? *subPath : storePath, repair, sub->isTrusted ? NoCheckSigs : CheckSigs);
promise.set_value();
} catch (...) {
@ -4662,11 +4691,11 @@ std::shared_ptr<DerivationGoal> Worker::makeBasicDerivationGoal(const StorePath
}
GoalPtr Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair)
GoalPtr Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair, std::optional<ContentAddress> ca)
{
GoalPtr goal = substitutionGoals[path].lock(); // FIXME
if (!goal) {
goal = std::make_shared<SubstitutionGoal>(path, *this, repair);
goal = std::make_shared<SubstitutionGoal>(path, *this, repair, ca);
substitutionGoals.insert_or_assign(path, goal);
wakeUp(goal);
}
@ -5008,7 +5037,7 @@ bool Worker::pathContentsGood(const StorePath & path)
if (!pathExists(store.printStorePath(path)))
res = false;
else {
HashResult current = hashPath(*info->narHash.type, store.printStorePath(path));
HashResult current = hashPath(info->narHash->type, store.printStorePath(path));
Hash nullHash(htSHA256);
res = info->narHash == nullHash || info->narHash == current.first;
}
@ -5034,7 +5063,7 @@ void Worker::markContentsGood(const StorePath & path)
static void primeCache(Store & store, const std::vector<StorePathWithOutputs> & paths)
{
StorePathSet willBuild, willSubstitute, unknown;
unsigned long long downloadSize, narSize;
uint64_t downloadSize, narSize;
store.queryMissing(paths, willBuild, willSubstitute, unknown, downloadSize, narSize);
if (!willBuild.empty() && 0 == settings.maxBuildJobs && getMachines().empty())

2
src/libstore/builtins/buildenv.hh
View file

@ -9,7 +9,7 @@ struct Package {
Path path;
bool active;
int priority;
Package(Path path, bool active, int priority) : path{path}, active{active}, priority{priority} {}
Package(const Path & path, bool active, int priority) : path{path}, active{active}, priority{priority} {}
};
typedef std::vector<Package> Packages;

17
src/libstore/builtins/fetchurl.cc
View file

@ -58,23 +58,6 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData)
}
};
/* We always have one output, and if it's a fixed-output derivation (as
checked below) it must be the only output */
auto & output = drv.outputs.begin()->second;
/* Try the hashed mirrors first. */
if (output.hash && output.hash->method == FileIngestionMethod::Flat)
for (auto hashedMirror : settings.hashedMirrors.get())
try {
if (!hasSuffix(hashedMirror, "/")) hashedMirror += '/';
auto & h = output.hash->hash;
fetch(hashedMirror + printHashType(*h.type) + "/" + h.to_string(Base16, false));
return;
} catch (Error & e) {
debug(e.what());
}
/* Otherwise try the specified URL. */
fetch(mainUrl);
}

4
src/libstore/content-address.cc
View file

@ -3,7 +3,7 @@
namespace nix {
std::string FixedOutputHash::printMethodAlgo() const {
return makeFileIngestionPrefix(method) + printHashType(*hash.type);
return makeFileIngestionPrefix(method) + printHashType(hash.type);
}
std::string makeFileIngestionPrefix(const FileIngestionMethod m) {
@ -46,7 +46,7 @@ ContentAddress parseContentAddress(std::string_view rawCa) {
if (prefix == "text") {
auto hashTypeAndHash = rawCa.substr(prefixSeparator+1, string::npos);
Hash hash = Hash(string(hashTypeAndHash));
if (*hash.type != htSHA256) {
if (hash.type != htSHA256) {
throw Error("parseContentAddress: the text hash should have type SHA256");
}
return TextHash { hash };

144
src/libstore/daemon.cc
View file

@ -173,31 +173,6 @@ struct TunnelSource : BufferedSource
}
};
/* If the NAR archive contains a single file at top-level, then save
the contents of the file to `s'. Otherwise barf. */
struct RetrieveRegularNARSink : ParseSink
{
bool regular;
string s;
RetrieveRegularNARSink() : regular(true) { }
void createDirectory(const Path & path)
{
regular = false;
}
void receiveContents(unsigned char * data, unsigned int len)
{
s.append((const char *) data, len);
}
void createSymlink(const Path & path, const string & target)
{
regular = false;
}
};
struct ClientSettings
{
bool keepFailed;
@ -314,7 +289,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork();
auto hash = store->queryPathInfo(path)->narHash;
logger->stopWork();
to << hash.to_string(Base16, false);
to << hash->to_string(Base16, false);
break;
}
@ -375,25 +350,28 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
}
case wopAddToStore: {
std::string s, baseName;
HashType hashAlgo;
std::string baseName;
FileIngestionMethod method;
{
bool fixed; uint8_t recursive;
from >> baseName >> fixed /* obsolete */ >> recursive >> s;
bool fixed;
uint8_t recursive;
std::string hashAlgoRaw;
from >> baseName >> fixed /* obsolete */ >> recursive >> hashAlgoRaw;
if (recursive > (uint8_t) FileIngestionMethod::Recursive)
throw Error("unsupported FileIngestionMethod with value of %i; you may need to upgrade nix-daemon", recursive);
method = FileIngestionMethod { recursive };
/* Compatibility hack. */
if (!fixed) {
s = "sha256";
hashAlgoRaw = "sha256";
method = FileIngestionMethod::Recursive;
}
hashAlgo = parseHashType(hashAlgoRaw);
}
HashType hashAlgo = parseHashType(s);
StringSink savedNAR;
TeeSource savedNARSource(from, savedNAR);
RetrieveRegularNARSink savedRegular;
StringSink saved;
TeeSource savedNARSource(from, saved);
RetrieveRegularNARSink savedRegular { saved };
if (method == FileIngestionMethod::Recursive) {
/* Get the entire NAR dump from the client and save it to
@ -407,11 +385,9 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork();
if (!savedRegular.regular) throw Error("regular file expected");
auto path = store->addToStoreFromDump(
method == FileIngestionMethod::Recursive ? *savedNAR.s : savedRegular.s,
baseName,
method,
hashAlgo);
// FIXME: try to stream directly from `from`.
StringSource dumpSource { *saved.s };
auto path = store->addToStoreFromDump(dumpSource, baseName, method, hashAlgo);
logger->stopWork();
to << store->printStorePath(path);
@ -475,7 +451,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopBuildDerivation: {
auto drvPath = store->parseStorePath(readString(from));
BasicDerivation drv;
readDerivation(from, *store, drv);
readDerivation(from, *store, drv, Derivation::nameFromPath(drvPath));
BuildMode buildMode = (BuildMode) readInt(from);
logger->startWork();
if (!trusted)
@ -603,7 +579,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
auto path = store->parseStorePath(readString(from));
logger->startWork();
SubstitutablePathInfos infos;
store->querySubstitutablePathInfos({path}, infos);
store->querySubstitutablePathInfos({{path, std::nullopt}}, infos);
logger->stopWork();
auto i = infos.find(path);
if (i == infos.end())
@ -619,10 +595,16 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
}
case wopQuerySubstitutablePathInfos: {
auto paths = readStorePaths<StorePathSet>(*store, from);
logger->startWork();
SubstitutablePathInfos infos;
store->querySubstitutablePathInfos(paths, infos);
StorePathCAMap pathsMap = {};
if (GET_PROTOCOL_MINOR(clientVersion) < 22) {
auto paths = readStorePaths<StorePathSet>(*store, from);
for (auto & path : paths)
pathsMap.emplace(path, std::nullopt);
} else
pathsMap = readStorePathCAMap(*store, from);
logger->startWork();
store->querySubstitutablePathInfos(pathsMap, infos);
logger->stopWork();
to << infos.size();
for (auto & i : infos) {
@ -656,7 +638,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
if (GET_PROTOCOL_MINOR(clientVersion) >= 17)
to << 1;
to << (info->deriver ? store->printStorePath(*info->deriver) : "")
<< info->narHash.to_string(Base16, false);
<< info->narHash->to_string(Base16, false);
writeStorePaths(*store, to, info->references);
to << info->registrationTime << info->narSize;
if (GET_PROTOCOL_MINOR(clientVersion) >= 16) {
@ -727,15 +709,73 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
if (!trusted)
info.ultimate = false;
std::string saved;
if (GET_PROTOCOL_MINOR(clientVersion) >= 23) {
struct FramedSource : Source
{
Source & from;
bool eof = false;
std::vector<unsigned char> pending;
size_t pos = 0;
FramedSource(Source & from) : from(from)
{ }
~FramedSource()
{
if (!eof) {
while (true) {
auto n = readInt(from);
if (!n) break;
std::vector<unsigned char> data(n);
from(data.data(), n);
}
}
}
size_t read(unsigned char * data, size_t len) override
{
if (eof) throw EndOfFile("reached end of FramedSource");
if (pos >= pending.size()) {
size_t len = readInt(from);
if (!len) {
eof = true;
return 0;
}
pending = std::vector<unsigned char>(len);
pos = 0;
from(pending.data(), len);
}
auto n = std::min(len, pending.size() - pos);
memcpy(data, pending.data() + pos, n);
pos += n;
return n;
}
};
logger->startWork();
{
FramedSource source(from);
store->addToStore(info, source, (RepairFlag) repair,
dontCheckSigs ? NoCheckSigs : CheckSigs);
}
logger->stopWork();
}
else {
std::unique_ptr<Source> source;
if (GET_PROTOCOL_MINOR(clientVersion) >= 21)
source = std::make_unique<TunnelSource>(from, to);
else {
TeeParseSink tee(from);
parseDump(tee, tee.source);
saved = std::move(*tee.saved.s);
source = std::make_unique<StringSource>(saved);
StringSink saved;
TeeSource tee { from, saved };
ParseSink ether;
parseDump(ether, tee);
source = std::make_unique<StringSource>(std::move(*saved.s));
}
logger->startWork();
@ -745,6 +785,8 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
dontCheckSigs ? NoCheckSigs : CheckSigs);
logger->stopWork();
}
break;
}
@ -754,7 +796,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
targets.push_back(store->parsePathWithOutputs(s));
logger->startWork();
StorePathSet willBuild, willSubstitute, unknown;
unsigned long long downloadSize, narSize;
uint64_t downloadSize, narSize;
store->queryMissing(targets, willBuild, willSubstitute, unknown, downloadSize, narSize);
logger->stopWork();
writeStorePaths(*store, to, willBuild);

99
src/libstore/derivations.cc
View file

@ -7,12 +7,20 @@
namespace nix {
const StorePath & BasicDerivation::findOutput(const string & id) const
// FIXME Put this somewhere?
template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
StorePath DerivationOutput::path(const Store & store, std::string_view drvName) const
{
auto i = outputs.find(id);
if (i == outputs.end())
throw Error("derivation has no output '%s'", id);
return i->second.path;
return std::visit(overloaded {
[](DerivationOutputInputAddressed doi) {
return doi.path;
},
[&](DerivationOutputFixed dof) {
return store.makeFixedOutputPath(dof.hash.method, dof.hash.hash, drvName);
}
}, output);
}
@ -107,7 +115,6 @@ static DerivationOutput parseDerivationOutput(const Store & store, std::istrings
expect(str, ","); const auto hash = parseString(str);
expect(str, ")");
std::optional<FixedOutputHash> fsh;
if (hashAlgo != "") {
auto method = FileIngestionMethod::Flat;
if (string(hashAlgo, 0, 2) == "r:") {
@ -115,22 +122,29 @@ static DerivationOutput parseDerivationOutput(const Store & store, std::istrings
hashAlgo = string(hashAlgo, 2);
}
const HashType hashType = parseHashType(hashAlgo);
fsh = FixedOutputHash {
.method = std::move(method),
.hash = Hash(hash, hashType),
};
}
return DerivationOutput {
.output = DerivationOutputFixed {
.hash = FixedOutputHash {
.method = std::move(method),
.hash = Hash(hash, hashType),
},
}
};
} else
return DerivationOutput {
.output = DerivationOutputInputAddressed {
.path = std::move(path),
.hash = std::move(fsh),
}
};
}
Derivation parseDerivation(const Store & store, std::string && s)
Derivation parseDerivation(const Store & store, std::string && s, std::string_view name)
{
Derivation drv;
drv.name = name;
std::istringstream str(std::move(s));
expect(str, "Derive([");
@ -235,10 +249,14 @@ string Derivation::unparse(const Store & store, bool maskOutputs,
for (auto & i : outputs) {
if (first) first = false; else s += ',';
s += '('; printUnquotedString(s, i.first);
s += ','; printUnquotedString(s, maskOutputs ? "" : store.printStorePath(i.second.path));
s += ','; printUnquotedString(s, i.second.hash ? i.second.hash->printMethodAlgo() : "");
s += ','; printUnquotedString(s,
i.second.hash ? i.second.hash->hash.to_string(Base16, false) : "");
s += ','; printUnquotedString(s, maskOutputs ? "" : store.printStorePath(i.second.path(store, name)));
if (auto hash = std::get_if<DerivationOutputFixed>(&i.second.output)) {
s += ','; printUnquotedString(s, hash->hash.printMethodAlgo());
s += ','; printUnquotedString(s, hash->hash.hash.to_string(Base16, false));
} else {
s += ','; printUnquotedString(s, "");
s += ','; printUnquotedString(s, "");
}
s += ')';
}
@ -294,7 +312,7 @@ bool BasicDerivation::isFixedOutput() const
{
return outputs.size() == 1 &&
outputs.begin()->first == "out" &&
outputs.begin()->second.hash;
std::holds_alternative<DerivationOutputFixed>(outputs.begin()->second.output);
}
@ -326,10 +344,11 @@ Hash hashDerivationModulo(Store & store, const Derivation & drv, bool maskOutput
/* Return a fixed hash for fixed-output derivations. */
if (drv.isFixedOutput()) {
DerivationOutputs::const_iterator i = drv.outputs.begin();
auto hash = std::get<DerivationOutputFixed>(i->second.output);
return hashString(htSHA256, "fixed:out:"
+ i->second.hash->printMethodAlgo() + ":"
+ i->second.hash->hash.to_string(Base16, false) + ":"
+ store.printStorePath(i->second.path));
+ hash.hash.printMethodAlgo() + ":"
+ hash.hash.hash.to_string(Base16, false) + ":"
+ store.printStorePath(i->second.path(store, drv.name)));
}
/* For other derivations, replace the inputs paths with recursive
@ -363,11 +382,11 @@ bool wantOutput(const string & output, const std::set<string> & wanted)
}
StorePathSet BasicDerivation::outputPaths() const
StorePathSet BasicDerivation::outputPaths(const Store & store) const
{
StorePathSet paths;
for (auto & i : outputs)
paths.insert(i.second.path);
paths.insert(i.second.path(store, name));
return paths;
}
@ -377,7 +396,6 @@ static DerivationOutput readDerivationOutput(Source & in, const Store & store)
auto hashAlgo = readString(in);
auto hash = readString(in);
std::optional<FixedOutputHash> fsh;
if (hashAlgo != "") {
auto method = FileIngestionMethod::Flat;
if (string(hashAlgo, 0, 2) == "r:") {
@ -385,15 +403,19 @@ static DerivationOutput readDerivationOutput(Source & in, const Store & store)
hashAlgo = string(hashAlgo, 2);
}
auto hashType = parseHashType(hashAlgo);
fsh = FixedOutputHash {
return DerivationOutput {
.output = DerivationOutputFixed {
.hash = FixedOutputHash {
.method = std::move(method),
.hash = Hash(hash, hashType),
};
},
}
};
} else
return DerivationOutput {
.output = DerivationOutputInputAddressed {
.path = std::move(path),
.hash = std::move(fsh),
}
};
}
@ -406,8 +428,19 @@ StringSet BasicDerivation::outputNames() const
}
Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv)
std::string_view BasicDerivation::nameFromPath(const StorePath & drvPath) {
auto nameWithSuffix = drvPath.name();
constexpr std::string_view extension = ".drv";
assert(hasSuffix(nameWithSuffix, extension));
nameWithSuffix.remove_suffix(extension.size());
return nameWithSuffix;
}
Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv, std::string_view name)
{
drv.name = name;
drv.outputs.clear();
auto nr = readNum<size_t>(in);
for (size_t n = 0; n < nr; n++) {
@ -436,10 +469,10 @@ void writeDerivation(Sink & out, const Store & store, const BasicDerivation & dr
out << drv.outputs.size();
for (auto & i : drv.outputs) {
out << i.first
<< store.printStorePath(i.second.path);
if (i.second.hash) {
out << i.second.hash->printMethodAlgo()
<< i.second.hash->hash.to_string(Base16, false);
<< store.printStorePath(i.second.path(store, drv.name));
if (auto hash = std::get_if<DerivationOutputFixed>(&i.second.output)) {
out << hash->hash.printMethodAlgo()
<< hash->hash.hash.to_string(Base16, false);
} else {
out << "" << "";
}

27
src/libstore/derivations.hh
View file

@ -13,10 +13,20 @@ namespace nix {
/* Abstract syntax of derivations. */
struct DerivationOutput
struct DerivationOutputInputAddressed
{
StorePath path;
std::optional<FixedOutputHash> hash; /* hash used for expected hash computation */
};
struct DerivationOutputFixed
{
FixedOutputHash hash; /* hash used for expected hash computation */
};
struct DerivationOutput
{
std::variant<DerivationOutputInputAddressed, DerivationOutputFixed> output;
StorePath path(const Store & store, std::string_view drvName) const;
};
typedef std::map<string, DerivationOutput> DerivationOutputs;
@ -35,24 +45,23 @@ struct BasicDerivation
Path builder;
Strings args;
StringPairs env;
std::string name;
BasicDerivation() { }
virtual ~BasicDerivation() { };
/* Return the path corresponding to the output identifier `id' in
the given derivation. */
const StorePath & findOutput(const std::string & id) const;
bool isBuiltin() const;
/* Return true iff this is a fixed-output derivation. */
bool isFixedOutput() const;
/* Return the output paths of a derivation. */
StorePathSet outputPaths() const;
StorePathSet outputPaths(const Store & store) const;
/* Return the output names of a derivation. */
StringSet outputNames() const;
static std::string_view nameFromPath(const StorePath & storePath);
};
struct Derivation : BasicDerivation
@ -76,7 +85,7 @@ StorePath writeDerivation(ref<Store> store,
const Derivation & drv, std::string_view name, RepairFlag repair = NoRepair);
/* Read a derivation from a file. */
Derivation parseDerivation(const Store & store, std::string && s);
Derivation parseDerivation(const Store & store, std::string && s, std::string_view name);
// FIXME: remove
bool isDerivation(const string & fileName);
@ -93,7 +102,7 @@ bool wantOutput(const string & output, const std::set<string> & wanted);
struct Source;
struct Sink;
Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv);
Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv, std::string_view name);
void writeDerivation(Sink & out, const Store & store, const BasicDerivation & drv);
std::string hashPlaceholder(const std::string & outputName);

16
src/libstore/export-import.cc
View file

@ -38,9 +38,9 @@ void Store::exportPath(const StorePath & path, Sink & sink)
filesystem corruption from spreading to other machines.
Don't complain if the stored hash is zero (unknown). */
Hash hash = hashSink.currentHash().first;
if (hash != info->narHash && info->narHash != Hash(*info->narHash.type))
if (hash != info->narHash && info->narHash != Hash(info->narHash->type))
throw Error("hash of path '%s' has changed from '%s' to '%s'!",
printStorePath(path), info->narHash.to_string(Base32, true), hash.to_string(Base32, true));
printStorePath(path), info->narHash->to_string(Base32, true), hash.to_string(Base32, true));
teeSink
<< exportMagic
@ -60,8 +60,10 @@ StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
if (n != 1) throw Error("input doesn't look like something created by 'nix-store --export'");
/* Extract the NAR from the source. */
TeeParseSink tee(source);
parseDump(tee, tee.source);
StringSink saved;
TeeSource tee { source, saved };
ParseSink ether;
parseDump(ether, tee);
uint32_t magic = readInt(source);
if (magic != exportMagic)
@ -77,15 +79,15 @@ StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
if (deriver != "")
info.deriver = parseStorePath(deriver);
info.narHash = hashString(htSHA256, *tee.saved.s);
info.narSize = tee.saved.s->size();
info.narHash = hashString(htSHA256, *saved.s);
info.narSize = saved.s->size();
// Ignore optional legacy signature.
if (readInt(source) == 1)
readString(source);
// Can't use underlying source, which would have been exhausted
auto source = StringSource { *tee.saved.s };
auto source = StringSource { *saved.s };
addToStore(info, source, NoRepair, checkSigs);
res.push_back(info.path);

57
src/libstore/filetransfer.cc
View file

@ -22,6 +22,7 @@
#include <queue>
#include <random>
#include <thread>
#include <regex>
using namespace std::string_literals;
@ -56,7 +57,7 @@ struct curlFileTransfer : public FileTransfer
Callback<FileTransferResult> callback;
CURL * req = 0;
bool active = false; // whether the handle has been added to the multi object
std::string status;
std::string statusMsg;
unsigned int attempt = 0;
@ -123,7 +124,7 @@ struct curlFileTransfer : public FileTransfer
if (requestHeaders) curl_slist_free_all(requestHeaders);
try {
if (!done)
fail(FileTransferError(Interrupted, "download of '%s' was interrupted", request.uri));
fail(FileTransferError(Interrupted, nullptr, "download of '%s' was interrupted", request.uri));
} catch (...) {
ignoreException();
}
@ -144,6 +145,7 @@ struct curlFileTransfer : public FileTransfer
LambdaSink finalSink;
std::shared_ptr<CompressionSink> decompressionSink;
std::optional<StringSink> errorSink;
std::exception_ptr writeException;
@ -153,9 +155,19 @@ struct curlFileTransfer : public FileTransfer
size_t realSize = size * nmemb;
result.bodySize += realSize;
if (!decompressionSink)
if (!decompressionSink) {
decompressionSink = makeDecompressionSink(encoding, finalSink);
if (! successfulStatuses.count(getHTTPStatus())) {
// In this case we want to construct a TeeSink, to keep
// the response around (which we figure won't be big
// like an actual download should be) to improve error
// messages.
errorSink = StringSink { };
}
}
if (errorSink)
(*errorSink)((unsigned char *) contents, realSize);
(*decompressionSink)((unsigned char *) contents, realSize);
return realSize;
@ -175,12 +187,13 @@ struct curlFileTransfer : public FileTransfer
size_t realSize = size * nmemb;
std::string line((char *) contents, realSize);
printMsg(lvlVomit, format("got header for '%s': %s") % request.uri % trim(line));
if (line.compare(0, 5, "HTTP/") == 0) { // new response starts
static std::regex statusLine("HTTP/[^ ]+ +[0-9]+(.*)", std::regex::extended | std::regex::icase);
std::smatch match;
if (std::regex_match(line, match, statusLine)) {
result.etag = "";
auto ss = tokenizeString<vector<string>>(line, " ");
status = ss.size() >= 2 ? ss[1] : "";
result.data = std::make_shared<std::string>();
result.bodySize = 0;
statusMsg = trim(match[1]);
acceptRanges = false;
encoding = "";
} else {
@ -194,7 +207,9 @@ struct curlFileTransfer : public FileTransfer
the expected ETag on a 200 response, then shut
down the connection because we already have the
data. */
if (result.etag == request.expectedETag && status == "200") {
long httpStatus = 0;
curl_easy_getinfo(req, CURLINFO_RESPONSE_CODE, &httpStatus);
if (result.etag == request.expectedETag && httpStatus == 200) {
debug(format("shutting down on 200 HTTP response with expected ETag"));
return 0;
}
@ -408,16 +423,21 @@ struct curlFileTransfer : public FileTransfer
attempt++;
std::shared_ptr<std::string> response;
if (errorSink)
response = errorSink->s;
auto exc =
code == CURLE_ABORTED_BY_CALLBACK && _isInterrupted
? FileTransferError(Interrupted, fmt("%s of '%s' was interrupted", request.verb(), request.uri))
? FileTransferError(Interrupted, response, "%s of '%s' was interrupted", request.verb(), request.uri)
: httpStatus != 0
? FileTransferError(err,
fmt("unable to %s '%s': HTTP error %d",
request.verb(), request.uri, httpStatus)
response,
fmt("unable to %s '%s': HTTP error %d ('%s')",
request.verb(), request.uri, httpStatus, statusMsg)
+ (code == CURLE_OK ? "" : fmt(" (curl error: %s)", curl_easy_strerror(code)))
)
: FileTransferError(err,
response,
fmt("unable to %s '%s': %s (%d)",
request.verb(), request.uri, curl_easy_strerror(code), code));
@ -675,7 +695,7 @@ struct curlFileTransfer : public FileTransfer
auto s3Res = s3Helper.getObject(bucketName, key);
FileTransferResult res;
if (!s3Res.data)
throw FileTransferError(NotFound, fmt("S3 object '%s' does not exist", request.uri));
throw FileTransferError(NotFound, nullptr, "S3 object '%s' does not exist", request.uri);
res.data = s3Res.data;
callback(std::move(res));
#else
@ -820,6 +840,21 @@ void FileTransfer::download(FileTransferRequest && request, Sink & sink)
}
}
template<typename... Args>
FileTransferError::FileTransferError(FileTransfer::Error error, std::shared_ptr<string> response, const Args & ... args)
: Error(args...), error(error), response(response)
{
const auto hf = hintfmt(args...);
// FIXME: Due to https://github.com/NixOS/nix/issues/3841 we don't know how
// to print different messages for different verbosity levels. For now
// we add some heuristics for detecting when we want to show the response.
if (response && (response->size() < 1024 || response->find("<html>") != string::npos)) {
err.hint = hintfmt("%1%\n\nresponse body:\n\n%2%", normaltxt(hf.str()), *response);
} else {
err.hint = hf;
}
}
bool isUri(const string & s)
{
if (s.compare(0, 8, "channel:") == 0) return true;

8
src/libstore/filetransfer.hh
View file

@ -103,10 +103,12 @@ class FileTransferError : public Error
{
public:
FileTransfer::Error error;
std::shared_ptr<string> response; // intentionally optional
template<typename... Args>
FileTransferError(FileTransfer::Error error, const Args & ... args)
: Error(args...), error(error)
{ }
FileTransferError(FileTransfer::Error error, std::shared_ptr<string> response, const Args & ... args);
virtual const char* sname() const override { return "FileTransferError"; }
};
bool isUri(const string & s);

14
src/libstore/gc.cc
View file

@ -500,7 +500,7 @@ struct LocalStore::GCState
StorePathSet alive;
bool gcKeepOutputs;
bool gcKeepDerivations;
unsigned long long bytesInvalidated;
uint64_t bytesInvalidated;
bool moveToTrash = true;
bool shouldDelete;
GCState(const GCOptions & options, GCResults & results)
@ -518,7 +518,7 @@ bool LocalStore::isActiveTempFile(const GCState & state,
void LocalStore::deleteGarbage(GCState & state, const Path & path)
{
unsigned long long bytesFreed;
uint64_t bytesFreed;
deletePath(path, bytesFreed);
state.results.bytesFreed += bytesFreed;
}
@ -528,7 +528,7 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
{
checkInterrupt();
unsigned long long size = 0;
uint64_t size = 0;
auto storePath = maybeParseStorePath(path);
if (storePath && isValidPath(*storePath)) {
@ -687,7 +687,7 @@ void LocalStore::removeUnusedLinks(const GCState & state)
AutoCloseDir dir(opendir(linksDir.c_str()));
if (!dir) throw SysError("opening directory '%1%'", linksDir);
long long actualSize = 0, unsharedSize = 0;
int64_t actualSize = 0, unsharedSize = 0;
struct dirent * dirent;
while (errno = 0, dirent = readdir(dir.get())) {
@ -717,10 +717,10 @@ void LocalStore::removeUnusedLinks(const GCState & state)
struct stat st;
if (stat(linksDir.c_str(), &st) == -1)
throw SysError("statting '%1%'", linksDir);
long long overhead = st.st_blocks * 512ULL;
auto overhead = st.st_blocks * 512ULL;
printInfo(format("note: currently hard linking saves %.2f MiB")
% ((unsharedSize - actualSize - overhead) / (1024.0 * 1024.0)));
printInfo("note: currently hard linking saves %.2f MiB",
((unsharedSize - actualSize - overhead) / (1024.0 * 1024.0)));
}

6
src/libstore/globals.hh
View file

@ -335,9 +335,6 @@ public:
"setuid/setgid bits or with file capabilities."};
#endif
Setting<Strings> hashedMirrors{this, {"http://tarballs.nixos.org/"}, "hashed-mirrors",
"A list of servers used by builtins.fetchurl to fetch files by hash."};
Setting<uint64_t> minFree{this, 0, "min-free",
"Automatically run the garbage collector when free disk space drops below the specified amount."};
@ -368,6 +365,9 @@ public:
Setting<size_t> narBufferSize{this, 32 * 1024 * 1024, "nar-buffer-size",
"Maximum size of NARs before spilling them to disk."};
Setting<std::string> flakeRegistry{this, "https://github.com/NixOS/flake-registry/raw/master/flake-registry.json", "flake-registry",
"Path or URI of the global flake registry."};
};

4
src/libstore/legacy-ssh-store.cc
View file

@ -113,7 +113,7 @@ struct LegacySSHStore : public Store
if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 4) {
auto s = readString(conn->from);
info->narHash = s.empty() ? Hash() : Hash(s);
info->narHash = s.empty() ? std::optional<Hash>{} : Hash{s};
info->ca = parseContentAddressOpt(readString(conn->from));
info->sigs = readStrings<StringSet>(conn->from);
}
@ -138,7 +138,7 @@ struct LegacySSHStore : public Store
<< cmdAddToStoreNar
<< printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false);
<< info.narHash->to_string(Base16, false);
writeStorePaths(*this, conn->to, info.references);
conn->to
<< info.registrationTime

217
src/libstore/local-store.cc
View file

@ -560,19 +560,12 @@ void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivat
DerivationOutputs::const_iterator out = drv.outputs.find("out");
if (out == drv.outputs.end())
throw Error("derivation '%s' does not have an output named 'out'", printStorePath(drvPath));
check(
makeFixedOutputPath(
out->second.hash->method,
out->second.hash->hash,
drvName),
out->second.path, "out");
}
else {
Hash h = hashDerivationModulo(*this, drv, true);
for (auto & i : drv.outputs)
check(makeOutputPath(i.first, h, drvName), i.second.path, i.first);
check(makeOutputPath(i.first, h, drvName), i.second.path(*this, drv.name), i.first);
}
}
@ -586,7 +579,7 @@ uint64_t LocalStore::addValidPath(State & state,
state.stmtRegisterValidPath.use()
(printStorePath(info.path))
(info.narHash.to_string(Base16, true))
(info.narHash->to_string(Base16, true))
(info.registrationTime == 0 ? time(0) : info.registrationTime)
(info.deriver ? printStorePath(*info.deriver) : "", (bool) info.deriver)
(info.narSize, info.narSize != 0)
@ -594,7 +587,7 @@ uint64_t LocalStore::addValidPath(State & state,
(concatStringsSep(" ", info.sigs), !info.sigs.empty())
(renderContentAddress(info.ca), (bool) info.ca)
.exec();
uint64_t id = sqlite3_last_insert_rowid(state.db);
uint64_t id = state.db.getLastInsertedRowId();
/* If this is a derivation, then store the derivation outputs in
the database. This is useful for the garbage collector: it can
@ -614,7 +607,7 @@ uint64_t LocalStore::addValidPath(State & state,
state.stmtAddDerivationOutput.use()
(id)
(i.first)
(printStorePath(i.second.path))
(printStorePath(i.second.path(*this, drv.name)))
.exec();
}
}
@ -686,7 +679,7 @@ void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info)
{
state.stmtUpdatePathInfo.use()
(info.narSize, info.narSize != 0)
(info.narHash.to_string(Base16, true))
(info.narHash->to_string(Base16, true))
(info.ultimate ? 1 : 0, info.ultimate)
(concatStringsSep(" ", info.sigs), !info.sigs.empty())
(renderContentAddress(info.ca), (bool) info.ca)
@ -846,20 +839,32 @@ StorePathSet LocalStore::querySubstitutablePaths(const StorePathSet & paths)
}
void LocalStore::querySubstitutablePathInfos(const StorePathSet & paths,
SubstitutablePathInfos & infos)
void LocalStore::querySubstitutablePathInfos(const StorePathCAMap & paths, SubstitutablePathInfos & infos)
{
if (!settings.useSubstitutes) return;
for (auto & sub : getDefaultSubstituters()) {
if (sub->storeDir != storeDir) continue;
for (auto & path : paths) {
if (infos.count(path)) continue;
debug("checking substituter '%s' for path '%s'", sub->getUri(), printStorePath(path));
auto subPath(path.first);
// recompute store path so that we can use a different store root
if (path.second) {
subPath = makeFixedOutputPathFromCA(path.first.name(), *path.second);
if (sub->storeDir == storeDir)
assert(subPath == path.first);
if (subPath != path.first)
debug("replaced path '%s' with '%s' for substituter '%s'", printStorePath(path.first), sub->printStorePath(subPath), sub->getUri());
} else if (sub->storeDir != storeDir) continue;
debug("checking substituter '%s' for path '%s'", sub->getUri(), sub->printStorePath(subPath));
try {
auto info = sub->queryPathInfo(path);
auto info = sub->queryPathInfo(subPath);
if (sub->storeDir != storeDir && !(info->isContentAddressed(*sub) && info->references.empty()))
continue;
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
std::shared_ptr<const ValidPathInfo>(info));
infos.insert_or_assign(path, SubstitutablePathInfo{
infos.insert_or_assign(path.first, SubstitutablePathInfo{
info->deriver,
info->references,
narInfo ? narInfo->fileSize : 0,
@ -900,7 +905,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
StorePathSet paths;
for (auto & i : infos) {
assert(i.narHash.type == htSHA256);
assert(i.narHash && i.narHash->type == htSHA256);
if (isValidPath_(*state, i.path))
updatePathInfo(*state, i);
else
@ -1013,7 +1018,7 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
if (hashResult.first != info.narHash)
throw Error("hash mismatch importing path '%s';\n wanted: %s\n got: %s",
printStorePath(info.path), info.narHash.to_string(Base32, true), hashResult.first.to_string(Base32, true));
printStorePath(info.path), info.narHash->to_string(Base32, true), hashResult.first.to_string(Base32, true));
if (hashResult.second != info.narSize)
throw Error("size mismatch importing path '%s';\n wanted: %s\n got: %s",
@ -1033,82 +1038,26 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
}
StorePath LocalStore::addToStoreFromDump(const string & dump, const string & name,
FileIngestionMethod method, HashType hashAlgo, RepairFlag repair)
{
Hash h = hashString(hashAlgo, dump);
auto dstPath = makeFixedOutputPath(method, h, name);
addTempRoot(dstPath);
if (repair || !isValidPath(dstPath)) {
/* The first check above is an optimisation to prevent
unnecessary lock acquisition. */
auto realPath = Store::toRealPath(dstPath);
PathLocks outputLock({realPath});
if (repair || !isValidPath(dstPath)) {
deletePath(realPath);
autoGC();
if (method == FileIngestionMethod::Recursive) {
StringSource source(dump);
restorePath(realPath, source);
} else
writeFile(realPath, dump);
canonicalisePathMetaData(realPath, -1);
/* Register the SHA-256 hash of the NAR serialisation of
the path in the database. We may just have computed it
above (if called with recursive == true and hashAlgo ==
sha256); otherwise, compute it here. */
HashResult hash;
if (method == FileIngestionMethod::Recursive) {
hash.first = hashAlgo == htSHA256 ? h : hashString(htSHA256, dump);
hash.second = dump.size();
} else
hash = hashPath(htSHA256, realPath);
optimisePath(realPath); // FIXME: combine with hashPath()
ValidPathInfo info(dstPath);
info.narHash = hash.first;
info.narSize = hash.second;
info.ca = FixedOutputHash { .method = method, .hash = h };
registerValidPath(info);
}
outputLock.setDeletion(true);
}
return dstPath;
}
StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
FileIngestionMethod method, HashType hashAlgo, PathFilter & filter, RepairFlag repair)
{
Path srcPath(absPath(_srcPath));
auto source = sinkToSource([&](Sink & sink) {
if (method == FileIngestionMethod::Recursive)
dumpPath(srcPath, sink, filter);
else
readFile(srcPath, sink);
});
return addToStoreFromDump(*source, name, method, hashAlgo, repair);
}
if (method != FileIngestionMethod::Recursive)
return addToStoreFromDump(readFile(srcPath), name, method, hashAlgo, repair);
/* For computing the NAR hash. */
auto sha256Sink = std::make_unique<HashSink>(htSHA256);
/* For computing the store path. In recursive SHA-256 mode, this
is the same as the NAR hash, so no need to do it again. */
std::unique_ptr<HashSink> hashSink =
hashAlgo == htSHA256
? nullptr
: std::make_unique<HashSink>(hashAlgo);
StorePath LocalStore::addToStoreFromDump(Source & source0, const string & name,
FileIngestionMethod method, HashType hashAlgo, RepairFlag repair)
{
/* For computing the store path. */
auto hashSink = std::make_unique<HashSink>(hashAlgo);
TeeSource source { source0, *hashSink };
/* Read the source path into memory, but only if it's up to
narBufferSize bytes. If it's larger, write it to a temporary
@ -1116,55 +1065,49 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
destination store path is already valid, we just delete the
temporary path. Otherwise, we move it to the destination store
path. */
bool inMemory = true;
std::string nar;
bool inMemory = false;
auto source = sinkToSource([&](Sink & sink) {
std::string dump;
LambdaSink sink2([&](const unsigned char * buf, size_t len) {
(*sha256Sink)(buf, len);
if (hashSink) (*hashSink)(buf, len);
if (inMemory) {
if (nar.size() + len > settings.narBufferSize) {
inMemory = false;
sink << 1;
sink((const unsigned char *) nar.data(), nar.size());
nar.clear();
} else {
nar.append((const char *) buf, len);
/* Fill out buffer, and decide whether we are working strictly in
memory based on whether we break out because the buffer is full
or the original source is empty */
while (dump.size() < settings.narBufferSize) {
auto oldSize = dump.size();
constexpr size_t chunkSize = 65536;
auto want = std::min(chunkSize, settings.narBufferSize - oldSize);
dump.resize(oldSize + want);
auto got = 0;
try {
got = source.read((uint8_t *) dump.data() + oldSize, want);
} catch (EndOfFile &) {
inMemory = true;
break;
}
dump.resize(oldSize + got);
}
if (!inMemory) sink(buf, len);
});
dumpPath(srcPath, sink2, filter);
});
std::unique_ptr<AutoDelete> delTempDir;
Path tempPath;
try {
/* Wait for the source coroutine to give us some dummy
data. This is so that we don't create the temporary
directory if the NAR fits in memory. */
readInt(*source);
if (!inMemory) {
/* Drain what we pulled so far, and then keep on pulling */
StringSource dumpSource { dump };
ChainSource bothSource { dumpSource, source };
auto tempDir = createTempDir(realStoreDir, "add");
delTempDir = std::make_unique<AutoDelete>(tempDir);
tempPath = tempDir + "/x";
restorePath(tempPath, *source);
if (method == FileIngestionMethod::Recursive)
restorePath(tempPath, bothSource);
else
writeFile(tempPath, bothSource);
} catch (EndOfFile &) {
if (!inMemory) throw;
/* The NAR fits in memory, so we didn't do restorePath(). */
dump.clear();
}
auto sha256 = sha256Sink->finish();
Hash hash = hashSink ? hashSink->finish().first : sha256.first;
auto [hash, size] = hashSink->finish();
auto dstPath = makeFixedOutputPath(method, hash, name);
@ -1186,22 +1129,34 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
autoGC();
if (inMemory) {
StringSource dumpSource { dump };
/* Restore from the NAR in memory. */
StringSource source(nar);
restorePath(realPath, source);
if (method == FileIngestionMethod::Recursive)
restorePath(realPath, dumpSource);
else
writeFile(realPath, dumpSource);
} else {
/* Move the temporary path we restored above. */
if (rename(tempPath.c_str(), realPath.c_str()))
throw Error("renaming '%s' to '%s'", tempPath, realPath);
}
/* For computing the nar hash. In recursive SHA-256 mode, this
is the same as the store hash, so no need to do it again. */
auto narHash = std::pair { hash, size };
if (method != FileIngestionMethod::Recursive || hashAlgo != htSHA256) {
HashSink narSink { htSHA256 };
dumpPath(realPath, narSink);
narHash = narSink.finish();
}
canonicalisePathMetaData(realPath, -1); // FIXME: merge into restorePath
optimisePath(realPath);
ValidPathInfo info(dstPath);
info.narHash = sha256.first;
info.narSize = sha256.second;
info.narHash = narHash.first;
info.narSize = narHash.second;
info.ca = FixedOutputHash { .method = method, .hash = hash };
registerValidPath(info);
}
@ -1359,9 +1314,9 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
std::unique_ptr<AbstractHashSink> hashSink;
if (!info->ca || !info->references.count(info->path))
hashSink = std::make_unique<HashSink>(*info->narHash.type);
hashSink = std::make_unique<HashSink>(info->narHash->type);
else
hashSink = std::make_unique<HashModuloSink>(*info->narHash.type, std::string(info->path.hashPart()));
hashSink = std::make_unique<HashModuloSink>(info->narHash->type, std::string(info->path.hashPart()));
dumpPath(Store::toRealPath(i), *hashSink);
auto current = hashSink->finish();
@ -1370,7 +1325,7 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
logError({
.name = "Invalid hash - path modified",
.hint = hintfmt("path '%s' was modified! expected hash '%s', got '%s'",
printStorePath(i), info->narHash.to_string(Base32, true), current.first.to_string(Base32, true))
printStorePath(i), info->narHash->to_string(Base32, true), current.first.to_string(Base32, true))
});
if (repair) repairPath(i); else errors = true;
} else {

8
src/libstore/local-store.hh
View file

@ -26,8 +26,8 @@ const int nixSchemaVersion = 10;
struct OptimiseStats
{
unsigned long filesLinked = 0;
unsigned long long bytesFreed = 0;
unsigned long long blocksFreed = 0;
uint64_t bytesFreed = 0;
uint64_t blocksFreed = 0;
};
@ -136,7 +136,7 @@ public:
StorePathSet querySubstitutablePaths(const StorePathSet & paths) override;
void querySubstitutablePathInfos(const StorePathSet & paths,
void querySubstitutablePathInfos(const StorePathCAMap & paths,
SubstitutablePathInfos & infos) override;
void addToStore(const ValidPathInfo & info, Source & source,
@ -150,7 +150,7 @@ public:
in `dump', which is either a NAR serialisation (if recursive ==
true) or simply the contents of a regular file (if recursive ==
false). */
StorePath addToStoreFromDump(const string & dump, const string & name,
StorePath addToStoreFromDump(Source & dump, const string & name,
FileIngestionMethod method = FileIngestionMethod::Recursive, HashType hashAlgo = htSHA256, RepairFlag repair = NoRepair) override;
StorePath addTextToStore(const string & name, const string & s,

3
src/libstore/local.mk
View file

@ -61,3 +61,6 @@ $(d)/build.cc:
clean-files += $(d)/schema.sql.gen.hh
$(eval $(call install-file-in, $(d)/nix-store.pc, $(prefix)/lib/pkgconfig, 0644))
$(foreach i, $(wildcard src/libstore/builtins/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/builtins, 0644)))

24
src/libstore/misc.cc
View file

@ -108,9 +108,19 @@ void Store::computeFSClosure(const StorePath & startPath,
}
std::optional<ContentAddress> getDerivationCA(const BasicDerivation & drv)
{
auto out = drv.outputs.find("out");
if (out != drv.outputs.end()) {
if (auto v = std::get_if<DerivationOutputFixed>(&out->second.output))
return v->hash;
}
return std::nullopt;
}
void Store::queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild_, StorePathSet & willSubstitute_, StorePathSet & unknown_,
unsigned long long & downloadSize_, unsigned long long & narSize_)
uint64_t & downloadSize_, uint64_t & narSize_)
{
Activity act(*logger, lvlDebug, actUnknown, "querying info about missing paths");
@ -122,8 +132,8 @@ void Store::queryMissing(const std::vector<StorePathWithOutputs> & targets,
{
std::unordered_set<std::string> done;
StorePathSet & unknown, & willSubstitute, & willBuild;
unsigned long long & downloadSize;
unsigned long long & narSize;
uint64_t & downloadSize;
uint64_t & narSize;
};
struct DrvState
@ -157,7 +167,7 @@ void Store::queryMissing(const std::vector<StorePathWithOutputs> & targets,
auto outPath = parseStorePath(outPathS);
SubstitutablePathInfos infos;
querySubstitutablePathInfos({outPath}, infos);
querySubstitutablePathInfos({{outPath, getDerivationCA(*drv)}}, infos);
if (infos.empty()) {
drvState_->lock()->done = true;
@ -198,8 +208,8 @@ void Store::queryMissing(const std::vector<StorePathWithOutputs> & targets,
PathSet invalid;
for (auto & j : drv->outputs)
if (wantOutput(j.first, path.outputs)
&& !isValidPath(j.second.path))
invalid.insert(printStorePath(j.second.path));
&& !isValidPath(j.second.path(*this, drv->name)))
invalid.insert(printStorePath(j.second.path(*this, drv->name)));
if (invalid.empty()) return;
if (settings.useSubstitutes && parsedDrv.substitutesAllowed()) {
@ -214,7 +224,7 @@ void Store::queryMissing(const std::vector<StorePathWithOutputs> & targets,
if (isValidPath(path.path)) return;
SubstitutablePathInfos infos;
querySubstitutablePathInfos({path.path}, infos);
querySubstitutablePathInfos({{path.path, std::nullopt}}, infos);
if (infos.empty()) {
auto state(state_.lock());

4
src/libstore/nar-accessor.cc
View file

@ -79,14 +79,14 @@ struct NarAccessor : public FSAccessor
parents.top()->isExecutable = true;
}
void preallocateContents(unsigned long long size) override
void preallocateContents(uint64_t size) override
{
assert(size <= std::numeric_limits<uint64_t>::max());
parents.top()->size = (uint64_t) size;
parents.top()->start = pos;
}
void receiveContents(unsigned char * data, unsigned int len) override
void receiveContents(unsigned char * data, size_t len) override
{ }
void createSymlink(const Path & path, const string & target) override

4
src/libstore/nar-info-disk-cache.cc
View file

@ -230,9 +230,9 @@ public:
(std::string(info->path.name()))
(narInfo ? narInfo->url : "", narInfo != 0)
(narInfo ? narInfo->compression : "", narInfo != 0)
(narInfo && narInfo->fileHash ? narInfo->fileHash.to_string(Base32, true) : "", narInfo && narInfo->fileHash)
(narInfo && narInfo->fileHash ? narInfo->fileHash->to_string(Base32, true) : "", narInfo && narInfo->fileHash)
(narInfo ? narInfo->fileSize : 0, narInfo != 0 && narInfo->fileSize)
(info->narHash.to_string(Base32, true))
(info->narHash->to_string(Base32, true))
(info->narSize)
(concatStringsSep(" ", info->shortRefs()))
(info->deriver ? std::string(info->deriver->to_string()) : "", (bool) info->deriver)

27
src/libstore/nar-info.cc
View file

@ -7,15 +7,14 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
: ValidPathInfo(StorePath(StorePath::dummy)) // FIXME: hack
{
auto corrupt = [&]() {
throw Error("NAR info file '%1%' is corrupt", whence);
return Error("NAR info file '%1%' is corrupt", whence);
};
auto parseHashField = [&](const string & s) {
try {
return Hash(s);
} catch (BadHash &) {
corrupt();
return Hash(); // never reached
throw corrupt();
}
};
@ -25,12 +24,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
while (pos < s.size()) {
size_t colon = s.find(':', pos);
if (colon == std::string::npos) corrupt();
if (colon == std::string::npos) throw corrupt();
std::string name(s, pos, colon - pos);
size_t eol = s.find('\n', colon + 2);
if (eol == std::string::npos) corrupt();
if (eol == std::string::npos) throw corrupt();
std::string value(s, colon + 2, eol - colon - 2);
@ -45,16 +44,16 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "FileHash")
fileHash = parseHashField(value);
else if (name == "FileSize") {
if (!string2Int(value, fileSize)) corrupt();
if (!string2Int(value, fileSize)) throw corrupt();
}
else if (name == "NarHash")
narHash = parseHashField(value);
else if (name == "NarSize") {
if (!string2Int(value, narSize)) corrupt();
if (!string2Int(value, narSize)) throw corrupt();
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");
if (!references.empty()) corrupt();
if (!references.empty()) throw corrupt();
for (auto & r : refs)
references.insert(StorePath(r));
}
@ -67,7 +66,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "Sig")
sigs.insert(value);
else if (name == "CA") {
if (ca) corrupt();
if (ca) throw corrupt();
// FIXME: allow blank ca or require skipping field?
ca = parseContentAddressOpt(value);
}
@ -77,7 +76,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
if (compression == "") compression = "bzip2";
if (!havePath || url.empty() || narSize == 0 || !narHash) corrupt();
if (!havePath || url.empty() || narSize == 0 || !narHash) throw corrupt();
}
std::string NarInfo::to_string(const Store & store) const
@ -87,11 +86,11 @@ std::string NarInfo::to_string(const Store & store) const
res += "URL: " + url + "\n";
assert(compression != "");
res += "Compression: " + compression + "\n";
assert(fileHash.type == htSHA256);
res += "FileHash: " + fileHash.to_string(Base32, true) + "\n";
assert(fileHash && fileHash->type == htSHA256);
res += "FileHash: " + fileHash->to_string(Base32, true) + "\n";
res += "FileSize: " + std::to_string(fileSize) + "\n";
assert(narHash.type == htSHA256);
res += "NarHash: " + narHash.to_string(Base32, true) + "\n";
assert(narHash && narHash->type == htSHA256);
res += "NarHash: " + narHash->to_string(Base32, true) + "\n";
res += "NarSize: " + std::to_string(narSize) + "\n";
res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";

2
src/libstore/nar-info.hh
View file

@ -10,7 +10,7 @@ struct NarInfo : ValidPathInfo
{
std::string url;
std::string compression;
Hash fileHash;
std::optional<Hash> fileHash;
uint64_t fileSize = 0;
std::string system;

2
src/libstore/optimise-store.cc
View file

@ -282,7 +282,7 @@ void LocalStore::optimiseStore(OptimiseStats & stats)
}
}
static string showBytes(unsigned long long bytes)
static string showBytes(uint64_t bytes)
{
return (format("%.2f MiB") % (bytes / (1024.0 * 1024.0))).str();
}

2
src/libstore/path.hh
View file

@ -64,6 +64,8 @@ typedef std::set<StorePath> StorePathSet;
typedef std::vector<StorePath> StorePaths;
typedef std::map<string, StorePath> OutputPathMap;
typedef std::map<StorePath, std::optional<ContentAddress>> StorePathCAMap;
/* Extension of derivations in the Nix store. */
const std::string drvExtension = ".drv";

81
src/libstore/profiles.cc
View file

@ -12,30 +12,24 @@
namespace nix {
static bool cmpGensByNumber(const Generation & a, const Generation & b)
{
return a.number < b.number;
}
/* Parse a generation name of the format
`<profilename>-<number>-link'. */
static int parseName(const string & profileName, const string & name)
static std::optional<GenerationNumber> parseName(const string & profileName, const string & name)
{
if (string(name, 0, profileName.size() + 1) != profileName + "-") return -1;
if (string(name, 0, profileName.size() + 1) != profileName + "-") return {};
string s = string(name, profileName.size() + 1);
string::size_type p = s.find("-link");
if (p == string::npos) return -1;
int n;
if (p == string::npos) return {};
unsigned int n;
if (string2Int(string(s, 0, p), n) && n >= 0)
return n;
else
return -1;
return {};
}
Generations findGenerations(Path profile, int & curGen)
std::pair<Generations, std::optional<GenerationNumber>> findGenerations(Path profile)
{
Generations gens;
@ -43,30 +37,34 @@ Generations findGenerations(Path profile, int & curGen)
auto profileName = std::string(baseNameOf(profile));
for (auto & i : readDirectory(profileDir)) {
int n;
if ((n = parseName(profileName, i.name)) != -1) {
Generation gen;
gen.path = profileDir + "/" + i.name;
gen.number = n;
if (auto n = parseName(profileName, i.name)) {
auto path = profileDir + "/" + i.name;
struct stat st;
if (lstat(gen.path.c_str(), &st) != 0)
throw SysError("statting '%1%'", gen.path);
gen.creationTime = st.st_mtime;
gens.push_back(gen);
if (lstat(path.c_str(), &st) != 0)
throw SysError("statting '%1%'", path);
gens.push_back({
.number = *n,
.path = path,
.creationTime = st.st_mtime
});
}
}
gens.sort(cmpGensByNumber);
gens.sort([](const Generation & a, const Generation & b)
{
return a.number < b.number;
});
curGen = pathExists(profile)
return {
gens,
pathExists(profile)
? parseName(profileName, readLink(profile))
: -1;
return gens;
: std::nullopt
};
}
static void makeName(const Path & profile, unsigned int num,
static void makeName(const Path & profile, GenerationNumber num,
Path & outLink)
{
Path prefix = (format("%1%-%2%") % profile % num).str();
@ -78,10 +76,9 @@ Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath)
{
/* The new generation number should be higher than old the
previous ones. */
int dummy;
Generations gens = findGenerations(profile, dummy);
auto [gens, dummy] = findGenerations(profile);
unsigned int num;
GenerationNumber num;
if (gens.size() > 0) {
Generation last = gens.back();
@ -121,7 +118,7 @@ static void removeFile(const Path & path)
}
void deleteGeneration(const Path & profile, unsigned int gen)
void deleteGeneration(const Path & profile, GenerationNumber gen)
{
Path generation;
makeName(profile, gen, generation);
@ -129,7 +126,7 @@ void deleteGeneration(const Path & profile, unsigned int gen)
}
static void deleteGeneration2(const Path & profile, unsigned int gen, bool dryRun)
static void deleteGeneration2(const Path & profile, GenerationNumber gen, bool dryRun)
{
if (dryRun)
printInfo(format("would remove generation %1%") % gen);
@ -140,31 +137,29 @@ static void deleteGeneration2(const Path & profile, unsigned int gen, bool dryRu
}
void deleteGenerations(const Path & profile, const std::set<unsigned int> & gensToDelete, bool dryRun)
void deleteGenerations(const Path & profile, const std::set<GenerationNumber> & gensToDelete, bool dryRun)
{
PathLocks lock;
lockProfile(lock, profile);
int curGen;
Generations gens = findGenerations(profile, curGen);
auto [gens, curGen] = findGenerations(profile);
if (gensToDelete.find(curGen) != gensToDelete.end())
if (gensToDelete.count(*curGen))
throw Error("cannot delete current generation of profile %1%'", profile);
for (auto & i : gens) {
if (gensToDelete.find(i.number) == gensToDelete.end()) continue;
if (!gensToDelete.count(i.number)) continue;
deleteGeneration2(profile, i.number, dryRun);
}
}
void deleteGenerationsGreaterThan(const Path & profile, int max, bool dryRun)
void deleteGenerationsGreaterThan(const Path & profile, GenerationNumber max, bool dryRun)
{
PathLocks lock;
lockProfile(lock, profile);
int curGen;
bool fromCurGen = false;
Generations gens = findGenerations(profile, curGen);
auto [gens, curGen] = findGenerations(profile);
for (auto i = gens.rbegin(); i != gens.rend(); ++i) {
if (i->number == curGen) {
fromCurGen = true;
@ -186,8 +181,7 @@ void deleteOldGenerations(const Path & profile, bool dryRun)
PathLocks lock;
lockProfile(lock, profile);
int curGen;
Generations gens = findGenerations(profile, curGen);
auto [gens, curGen] = findGenerations(profile);
for (auto & i : gens)
if (i.number != curGen)
@ -200,8 +194,7 @@ void deleteGenerationsOlderThan(const Path & profile, time_t t, bool dryRun)
PathLocks lock;
lockProfile(lock, profile);
int curGen;
Generations gens = findGenerations(profile, curGen);
auto [gens, curGen] = findGenerations(profile);
bool canDelete = false;
for (auto i = gens.rbegin(); i != gens.rend(); ++i)

25
src/libstore/profiles.hh
View file

@ -9,37 +9,32 @@
namespace nix {
typedef unsigned int GenerationNumber;
struct Generation
{
int number;
GenerationNumber number;
Path path;
time_t creationTime;
Generation()
{
number = -1;
}
operator bool() const
{
return number != -1;
}
};
typedef list<Generation> Generations;
typedef std::list<Generation> Generations;
/* Returns the list of currently present generations for the specified
profile, sorted by generation number. */
Generations findGenerations(Path profile, int & curGen);
profile, sorted by generation number. Also returns the number of
the current generation. */
std::pair<Generations, std::optional<GenerationNumber>> findGenerations(Path profile);
class LocalFSStore;
Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath);
void deleteGeneration(const Path & profile, unsigned int gen);
void deleteGeneration(const Path & profile, GenerationNumber gen);
void deleteGenerations(const Path & profile, const std::set<unsigned int> & gensToDelete, bool dryRun);
void deleteGenerations(const Path & profile, const std::set<GenerationNumber> & gensToDelete, bool dryRun);
void deleteGenerationsGreaterThan(const Path & profile, const int max, bool dryRun);
void deleteGenerationsGreaterThan(const Path & profile, GenerationNumber max, bool dryRun);
void deleteOldGenerations(const Path & profile, bool dryRun);

21
src/libstore/references.cc
View file

@ -48,13 +48,12 @@ static void search(const unsigned char * s, size_t len,
struct RefScanSink : Sink
{
HashSink hashSink;
StringSet hashes;
StringSet seen;
string tail;
RefScanSink() : hashSink(htSHA256) { }
RefScanSink() { }
void operator () (const unsigned char * data, size_t len);
};
@ -62,8 +61,6 @@ struct RefScanSink : Sink
void RefScanSink::operator () (const unsigned char * data, size_t len)
{
hashSink(data, len);
/* It's possible that a reference spans the previous and current
fragment, so search in the concatenation of the tail of the
previous fragment and the start of the current fragment. */
@ -79,10 +76,12 @@ void RefScanSink::operator () (const unsigned char * data, size_t len)
}
PathSet scanForReferences(const string & path,
const PathSet & refs, HashResult & hash)
std::pair<PathSet, HashResult> scanForReferences(const string & path,
const PathSet & refs)
{
RefScanSink sink;
RefScanSink refsSink;
HashSink hashSink { htSHA256 };
TeeSink sink { refsSink, hashSink };
std::map<string, Path> backMap;
/* For efficiency (and a higher hit rate), just search for the
@ -97,7 +96,7 @@ PathSet scanForReferences(const string & path,
assert(s.size() == refLength);
assert(backMap.find(s) == backMap.end());
// parseHash(htSHA256, s);
sink.hashes.insert(s);
refsSink.hashes.insert(s);
backMap[s] = i;
}
@ -106,15 +105,15 @@ PathSet scanForReferences(const string & path,
/* Map the hashes found back to their store paths. */
PathSet found;
for (auto & i : sink.seen) {
for (auto & i : refsSink.seen) {
std::map<string, Path>::iterator j;
if ((j = backMap.find(i)) == backMap.end()) abort();
found.insert(j->second);
}
hash = sink.hashSink.finish();
auto hash = hashSink.finish();
return found;
return std::pair<PathSet, HashResult>(found, hash);
}

3
src/libstore/references.hh
View file

@ -5,8 +5,7 @@
namespace nix {
PathSet scanForReferences(const Path & path, const PathSet & refs,
HashResult & hash);
std::pair<PathSet, HashResult> scanForReferences(const Path & path, const PathSet & refs);
struct RewritingSink : Sink
{

120
src/libstore/remote-store.cc
View file

@ -39,6 +39,24 @@ void writeStorePaths(const Store & store, Sink & out, const StorePathSet & paths
out << store.printStorePath(i);
}
StorePathCAMap readStorePathCAMap(const Store & store, Source & from)
{
StorePathCAMap paths;
auto count = readNum<size_t>(from);
while (count--)
paths.insert_or_assign(store.parseStorePath(readString(from)), parseContentAddressOpt(readString(from)));
return paths;
}
void writeStorePathCAMap(const Store & store, Sink & out, const StorePathCAMap & paths)
{
out << paths.size();
for (auto & i : paths) {
out << store.printStorePath(i.first);
out << renderContentAddress(i.second);
}
}
std::map<string, StorePath> readOutputPathMap(const Store & store, Source & from)
{
std::map<string, StorePath> pathMap;
@ -332,18 +350,17 @@ StorePathSet RemoteStore::querySubstitutablePaths(const StorePathSet & paths)
}
void RemoteStore::querySubstitutablePathInfos(const StorePathSet & paths,
SubstitutablePathInfos & infos)
void RemoteStore::querySubstitutablePathInfos(const StorePathCAMap & pathsMap, SubstitutablePathInfos & infos)
{
if (paths.empty()) return;
if (pathsMap.empty()) return;
auto conn(getConnection());
if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 12) {
for (auto & i : paths) {
for (auto & i : pathsMap) {
SubstitutablePathInfo info;
conn->to << wopQuerySubstitutablePathInfo << printStorePath(i);
conn->to << wopQuerySubstitutablePathInfo << printStorePath(i.first);
conn.processStderr();
unsigned int reply = readInt(conn->from);
if (reply == 0) continue;
@ -353,13 +370,19 @@ void RemoteStore::querySubstitutablePathInfos(const StorePathSet & paths,
info.references = readStorePaths<StorePathSet>(*this, conn->from);
info.downloadSize = readLongLong(conn->from);
info.narSize = readLongLong(conn->from);
infos.insert_or_assign(i, std::move(info));
infos.insert_or_assign(i.first, std::move(info));
}
} else {
conn->to << wopQuerySubstitutablePathInfos;
if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 22) {
StorePathSet paths;
for (auto & path : pathsMap)
paths.insert(path.first);
writeStorePaths(*this, conn->to, paths);
} else
writeStorePathCAMap(*this, conn->to, pathsMap);
conn.processStderr();
size_t count = readNum<size_t>(conn->from);
for (size_t n = 0; n < count; n++) {
@ -498,14 +521,89 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
conn->to << wopAddToStoreNar
<< printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false);
<< info.narHash->to_string(Base16, false);
writeStorePaths(*this, conn->to, info.references);
conn->to << info.registrationTime << info.narSize
<< info.ultimate << info.sigs << renderContentAddress(info.ca)
<< repair << !checkSigs;
bool tunnel = GET_PROTOCOL_MINOR(conn->daemonVersion) >= 21;
if (!tunnel) copyNAR(source, conn->to);
conn.processStderr(0, tunnel ? &source : nullptr);
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 23) {
std::exception_ptr ex;
struct FramedSink : BufferedSink
{
ConnectionHandle & conn;
std::exception_ptr & ex;
FramedSink(ConnectionHandle & conn, std::exception_ptr & ex) : conn(conn), ex(ex)
{ }
~FramedSink()
{
try {
conn->to << 0;
conn->to.flush();
} catch (...) {
ignoreException();
}
}
void write(const unsigned char * data, size_t len) override
{
/* Don't send more data if the remote has
encountered an error. */
if (ex) {
auto ex2 = ex;
ex = nullptr;
std::rethrow_exception(ex2);
}
conn->to << len;
conn->to(data, len);
};
};
/* Handle log messages / exceptions from the remote on a
separate thread. */
std::thread stderrThread([&]()
{
try {
conn.processStderr();
} catch (...) {
ex = std::current_exception();
}
});
Finally joinStderrThread([&]()
{
if (stderrThread.joinable()) {
stderrThread.join();
if (ex) {
try {
std::rethrow_exception(ex);
} catch (...) {
ignoreException();
}
}
}
});
{
FramedSink sink(conn, ex);
copyNAR(source, sink);
sink.flush();
}
stderrThread.join();
if (ex)
std::rethrow_exception(ex);
} else if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 21) {
conn.processStderr(0, &source);
} else {
copyNAR(source, conn->to);
conn.processStderr(0, nullptr);
}
}
}
@ -707,7 +805,7 @@ void RemoteStore::addSignatures(const StorePath & storePath, const StringSet & s
void RemoteStore::queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize)
uint64_t & downloadSize, uint64_t & narSize)
{
{
auto conn(getConnection());

4
src/libstore/remote-store.hh
View file

@ -56,7 +56,7 @@ public:
StorePathSet querySubstitutablePaths(const StorePathSet & paths) override;
void querySubstitutablePathInfos(const StorePathSet & paths,
void querySubstitutablePathInfos(const StorePathCAMap & paths,
SubstitutablePathInfos & infos) override;
void addToStore(const ValidPathInfo & info, Source & nar,
@ -94,7 +94,7 @@ public:
void queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize) override;
uint64_t & downloadSize, uint64_t & narSize) override;
void connect() override;

7
src/libstore/s3-binary-cache-store.cc
View file

@ -343,13 +343,10 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1)
.count();
auto size = istream->tellg();
printInfo("uploaded 's3://%s/%s' (%d bytes) in %d ms",
bucketName, path, size, duration);
printInfo("uploaded 's3://%s/%s' in %d ms",
bucketName, path, duration);
stats.putTimeMs += duration;
stats.putBytes += size;
stats.put++;
}

1
src/libstore/s3-binary-cache-store.hh
View file

@ -19,7 +19,6 @@ public:
struct Stats
{
std::atomic<uint64_t> put{0};
std::atomic<uint64_t> putBytes{0};
std::atomic<uint64_t> putTimeMs{0};
std::atomic<uint64_t> get{0};
std::atomic<uint64_t> getBytes{0};

9
src/libstore/sqlite.cc
View file

@ -61,6 +61,11 @@ void SQLite::exec(const std::string & stmt)
});
}
uint64_t SQLite::getLastInsertedRowId()
{
return sqlite3_last_insert_rowid(db);
}
void SQLiteStmt::create(sqlite3 * db, const string & sql)
{
checkInterrupt();
@ -95,10 +100,10 @@ SQLiteStmt::Use::~Use()
sqlite3_reset(stmt);
}
SQLiteStmt::Use & SQLiteStmt::Use::operator () (const std::string & value, bool notNull)
SQLiteStmt::Use & SQLiteStmt::Use::operator () (std::string_view value, bool notNull)
{
if (notNull) {
if (sqlite3_bind_text(stmt, curArg++, value.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
if (sqlite3_bind_text(stmt, curArg++, value.data(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throwSQLiteError(stmt.db, "binding argument");
} else
bind();

4
src/libstore/sqlite.hh
View file

@ -26,6 +26,8 @@ struct SQLite
void isCache();
void exec(const std::string & stmt);
uint64_t getLastInsertedRowId();
};
/* RAII wrapper to create and destroy SQLite prepared statements. */
@ -54,7 +56,7 @@ struct SQLiteStmt
~Use();
/* Bind the next parameter. */
Use & operator () (const std::string & value, bool notNull = true);
Use & operator () (std::string_view value, bool notNull = true);
Use & operator () (const unsigned char * data, size_t len, bool notNull = true);
Use & operator () (int64_t value, bool notNull = true);
Use & bind(); // null

185
src/libstore/store-api.cc
View file

@ -193,6 +193,23 @@ StorePath Store::makeFixedOutputPath(
}
}
// FIXME Put this somewhere?
template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
StorePath Store::makeFixedOutputPathFromCA(std::string_view name, ContentAddress ca,
const StorePathSet & references, bool hasSelfReference) const
{
// New template
return std::visit(overloaded {
[&](TextHash th) {
return makeTextPath(name, th.hash, references);
},
[&](FixedOutputHash fsh) {
return makeFixedOutputPath(fsh.method, fsh.hash, name, references, hasSelfReference);
}
}, ca);
}
StorePath Store::makeTextPath(std::string_view name, const Hash & hash,
const StorePathSet & references) const
@ -222,20 +239,73 @@ StorePath Store::computeStorePathForText(const string & name, const string & s,
}
/*
The aim of this function is to compute in one pass the correct ValidPathInfo for
the files that we are trying to add to the store. To accomplish that in one
pass, given the different kind of inputs that we can take (normal nar archives,
nar archives with non SHA-256 hashes, and flat files), we set up a net of sinks
and aliases. Also, since the dataflow is obfuscated by this, we include here a
graphviz diagram:
digraph graphname {
node [shape=box]
fileSource -> narSink
narSink [style=dashed]
narSink -> unsualHashTee [style = dashed, label = "Recursive && !SHA-256"]
narSink -> narHashSink [style = dashed, label = "else"]
unsualHashTee -> narHashSink
unsualHashTee -> caHashSink
fileSource -> parseSink
parseSink [style=dashed]
parseSink-> fileSink [style = dashed, label = "Flat"]
parseSink -> blank [style = dashed, label = "Recursive"]
fileSink -> caHashSink
}
*/
ValidPathInfo Store::addToStoreSlow(std::string_view name, const Path & srcPath,
FileIngestionMethod method, HashType hashAlgo,
std::optional<Hash> expectedCAHash)
{
/* FIXME: inefficient: we're reading/hashing 'tmpFile' three
times. */
HashSink narHashSink { htSHA256 };
HashSink caHashSink { hashAlgo };
auto [narHash, narSize] = hashPath(htSHA256, srcPath);
/* Note that fileSink and unusualHashTee must be mutually exclusive, since
they both write to caHashSink. Note that that requisite is currently true
because the former is only used in the flat case. */
RetrieveRegularNARSink fileSink { caHashSink };
TeeSink unusualHashTee { narHashSink, caHashSink };
auto hash = method == FileIngestionMethod::Recursive
? hashAlgo == htSHA256
auto & narSink = method == FileIngestionMethod::Recursive && hashAlgo != htSHA256
? static_cast<Sink &>(unusualHashTee)
: narHashSink;
/* Functionally, this means that fileSource will yield the content of
srcPath. The fact that we use scratchpadSink as a temporary buffer here
is an implementation detail. */
auto fileSource = sinkToSource([&](Sink & scratchpadSink) {
dumpPath(srcPath, scratchpadSink);
});
/* tapped provides the same data as fileSource, but we also write all the
information to narSink. */
TeeSource tapped { *fileSource, narSink };
ParseSink blank;
auto & parseSink = method == FileIngestionMethod::Flat
? fileSink
: blank;
/* The information that flows from tapped (besides being replicated in
narSink), is now put in parseSink. */
parseDump(parseSink, tapped);
/* We extract the result of the computation from the sink by calling
finish. */
auto [narHash, narSize] = narHashSink.finish();
auto hash = method == FileIngestionMethod::Recursive && hashAlgo == htSHA256
? narHash
: hashPath(hashAlgo, srcPath).first
: hashFile(hashAlgo, srcPath);
: caHashSink.finish().first;
if (expectedCAHash && expectedCAHash != hash)
throw Error("hash mismatch for '%s'", srcPath);
@ -246,8 +316,8 @@ ValidPathInfo Store::addToStoreSlow(std::string_view name, const Path & srcPath,
info.ca = FixedOutputHash { .method = method, .hash = hash };
if (!isValidPath(info.path)) {
auto source = sinkToSource([&](Sink & sink) {
dumpPath(srcPath, sink);
auto source = sinkToSource([&](Sink & scratchpadSink) {
dumpPath(srcPath, scratchpadSink);
});
addToStore(info, *source);
}
@ -485,7 +555,7 @@ string Store::makeValidityRegistration(const StorePathSet & paths,
auto info = queryPathInfo(i);
if (showHash) {
s += info->narHash.to_string(Base16, false) + "\n";
s += info->narHash->to_string(Base16, false) + "\n";
s += (format("%1%\n") % info->narSize).str();
}
@ -517,7 +587,7 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & store
auto info = queryPathInfo(storePath);
jsonPath
.attr("narHash", info->narHash.to_string(hashBase, true))
.attr("narHash", info->narHash->to_string(hashBase, true))
.attr("narSize", info->narSize);
{
@ -560,7 +630,7 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & store
if (!narInfo->url.empty())
jsonPath.attr("url", narInfo->url);
if (narInfo->fileHash)
jsonPath.attr("downloadHash", narInfo->fileHash.to_string(hashBase, true));
jsonPath.attr("downloadHash", narInfo->fileHash->to_string(hashBase, true));
if (narInfo->fileSize)
jsonPath.attr("downloadSize", narInfo->fileSize);
if (showClosureSize)
@ -636,6 +706,15 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
uint64_t total = 0;
// recompute store path on the chance dstStore does it differently
if (info->ca && info->references.empty()) {
auto info2 = make_ref<ValidPathInfo>(*info);
info2->path = dstStore->makeFixedOutputPathFromCA(info->path.name(), *info->ca);
if (dstStore->storeDir == srcStore->storeDir)
assert(info->path == info2->path);
info = info2;
}
if (!info->narHash) {
StringSink sink;
srcStore->narFromPath({storePath}, sink);
@ -671,16 +750,20 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
}
void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & storePaths,
std::map<StorePath, StorePath> copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & storePaths,
RepairFlag repair, CheckSigsFlag checkSigs, SubstituteFlag substitute)
{
auto valid = dstStore->queryValidPaths(storePaths, substitute);
PathSet missing;
StorePathSet missing;
for (auto & path : storePaths)
if (!valid.count(path)) missing.insert(srcStore->printStorePath(path));
if (!valid.count(path)) missing.insert(path);
if (missing.empty()) return;
std::map<StorePath, StorePath> pathsMap;
for (auto & path : storePaths)
pathsMap.insert_or_assign(path, path);
if (missing.empty()) return pathsMap;
Activity act(*logger, lvlInfo, actCopyPaths, fmt("copying %d paths", missing.size()));
@ -695,30 +778,49 @@ void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & st
ThreadPool pool;
processGraph<Path>(pool,
PathSet(missing.begin(), missing.end()),
processGraph<StorePath>(pool,
StorePathSet(missing.begin(), missing.end()),
[&](const Path & storePath) {
if (dstStore->isValidPath(dstStore->parseStorePath(storePath))) {
[&](const StorePath & storePath) {
auto info = srcStore->queryPathInfo(storePath);
auto storePathForDst = storePath;
if (info->ca && info->references.empty()) {
storePathForDst = dstStore->makeFixedOutputPathFromCA(storePath.name(), *info->ca);
if (dstStore->storeDir == srcStore->storeDir)
assert(storePathForDst == storePath);
if (storePathForDst != storePath)
debug("replaced path '%s' to '%s' for substituter '%s'", srcStore->printStorePath(storePath), dstStore->printStorePath(storePathForDst), dstStore->getUri());
}
pathsMap.insert_or_assign(storePath, storePathForDst);
if (dstStore->isValidPath(storePath)) {
nrDone++;
showProgress();
return PathSet();
return StorePathSet();
}
auto info = srcStore->queryPathInfo(srcStore->parseStorePath(storePath));
bytesExpected += info->narSize;
act.setExpected(actCopyPath, bytesExpected);
return srcStore->printStorePathSet(info->references);
return info->references;
},
[&](const Path & storePathS) {
[&](const StorePath & storePath) {
checkInterrupt();
auto storePath = dstStore->parseStorePath(storePathS);
auto info = srcStore->queryPathInfo(storePath);
if (!dstStore->isValidPath(storePath)) {
auto storePathForDst = storePath;
if (info->ca && info->references.empty()) {
storePathForDst = dstStore->makeFixedOutputPathFromCA(storePath.name(), *info->ca);
if (dstStore->storeDir == srcStore->storeDir)
assert(storePathForDst == storePath);
if (storePathForDst != storePath)
debug("replaced path '%s' to '%s' for substituter '%s'", srcStore->printStorePath(storePath), dstStore->printStorePath(storePathForDst), dstStore->getUri());
}
pathsMap.insert_or_assign(storePath, storePathForDst);
if (!dstStore->isValidPath(storePathForDst)) {
MaintainCount<decltype(nrRunning)> mc(nrRunning);
showProgress();
try {
@ -727,7 +829,7 @@ void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & st
nrFailed++;
if (!settings.keepGoing)
throw e;
logger->log(lvlError, fmt("could not copy %s: %s", storePathS, e.what()));
logger->log(lvlError, fmt("could not copy %s: %s", dstStore->printStorePath(storePath), e.what()));
showProgress();
return;
}
@ -736,6 +838,8 @@ void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & st
nrDone++;
showProgress();
});
return pathsMap;
}
@ -801,7 +905,7 @@ std::string ValidPathInfo::fingerprint(const Store & store) const
store.printStorePath(path));
return
"1;" + store.printStorePath(path) + ";"
+ narHash.to_string(Base32, true) + ";"
+ narHash->to_string(Base32, true) + ";"
+ std::to_string(narSize) + ";"
+ concatStringsSep(",", store.printStorePathSet(references));
}
@ -812,10 +916,6 @@ void ValidPathInfo::sign(const Store & store, const SecretKey & secretKey)
sigs.insert(secretKey.signDetached(fingerprint(store)));
}
// FIXME Put this somewhere?
template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
bool ValidPathInfo::isContentAddressed(const Store & store) const
{
if (! ca) return false;
@ -882,7 +982,9 @@ Derivation Store::readDerivation(const StorePath & drvPath)
{
auto accessor = getFSAccessor();
try {
return parseDerivation(*this, accessor->readFile(printStorePath(drvPath)));
return parseDerivation(*this,
accessor->readFile(printStorePath(drvPath)),
Derivation::nameFromPath(drvPath));
} catch (FormatError & e) {
throw Error("error parsing derivation '%s': %s", printStorePath(drvPath), e.msg());
}
@ -932,12 +1034,20 @@ ref<Store> openStore(const std::string & uri_,
throw Error("don't know how to open Nix store '%s'", uri);
}
static bool isNonUriPath(const std::string & spec) {
return
// is not a URL
spec.find("://") == std::string::npos
// Has at least one path separator, and so isn't a single word that
// might be special like "auto"
&& spec.find("/") != std::string::npos;
}
StoreType getStoreType(const std::string & uri, const std::string & stateDir)
{
if (uri == "daemon") {
return tDaemon;
} else if (uri == "local" || hasPrefix(uri, "/")) {
} else if (uri == "local" || isNonUriPath(uri)) {
return tLocal;
} else if (uri == "" || uri == "auto") {
if (access(stateDir.c_str(), R_OK | W_OK) == 0)
@ -961,8 +1071,9 @@ static RegisterStoreImplementation regStore([](
return std::shared_ptr<Store>(std::make_shared<UDSRemoteStore>(params));
case tLocal: {
Store::Params params2 = params;
if (hasPrefix(uri, "/"))
params2["root"] = uri;
if (isNonUriPath(uri)) {
params2["root"] = absPath(uri);
}
return std::shared_ptr<Store>(std::make_shared<LocalStore>(params2));
}
default:

42
src/libstore/store-api.hh
View file

@ -85,7 +85,7 @@ struct GCOptions
StorePathSet pathsToDelete;
/* Stop after at least `maxFreed' bytes have been freed. */
unsigned long long maxFreed{std::numeric_limits<unsigned long long>::max()};
uint64_t maxFreed{std::numeric_limits<uint64_t>::max()};
};
@ -97,7 +97,7 @@ struct GCResults
/* For `gcReturnDead', `gcDeleteDead' and `gcDeleteSpecific', the
number of bytes that would be or was freed. */
unsigned long long bytesFreed = 0;
uint64_t bytesFreed = 0;
};
@ -105,8 +105,8 @@ struct SubstitutablePathInfo
{
std::optional<StorePath> deriver;
StorePathSet references;
unsigned long long downloadSize; /* 0 = unknown or inapplicable */
unsigned long long narSize; /* 0 = unknown */
uint64_t downloadSize; /* 0 = unknown or inapplicable */
uint64_t narSize; /* 0 = unknown */
};
typedef std::map<StorePath, SubstitutablePathInfo> SubstitutablePathInfos;
@ -115,7 +115,8 @@ struct ValidPathInfo
{
StorePath path;
std::optional<StorePath> deriver;
Hash narHash;
// TODO document this
std::optional<Hash> narHash;
StorePathSet references;
time_t registrationTime = 0;
uint64_t narSize = 0; // 0 = unknown
@ -343,7 +344,11 @@ public:
bool hasSelfReference = false) const;
StorePath makeTextPath(std::string_view name, const Hash & hash,
const StorePathSet & references) const;
const StorePathSet & references = {}) const;
StorePath makeFixedOutputPathFromCA(std::string_view name, ContentAddress ca,
const StorePathSet & references = {},
bool hasSelfReference = false) const;
/* This is the preparatory part of addToStore(); it computes the
store path to which srcPath is to be copied. Returns the store
@ -435,9 +440,10 @@ public:
virtual StorePathSet querySubstitutablePaths(const StorePathSet & paths) { return {}; };
/* Query substitute info (i.e. references, derivers and download
sizes) of a set of paths. If a path does not have substitute
info, it's omitted from the resulting ‘infos’ map. */
virtual void querySubstitutablePathInfos(const StorePathSet & paths,
sizes) of a map of paths to their optional ca values. If a path
does not have substitute info, it's omitted from the resulting
‘infos’ map. */
virtual void querySubstitutablePathInfos(const StorePathCAMap & paths,
SubstitutablePathInfos & infos) { return; };
/* Import a path into the store. */
@ -460,7 +466,7 @@ public:
std::optional<Hash> expectedCAHash = {});
// FIXME: remove?
virtual StorePath addToStoreFromDump(const string & dump, const string & name,
virtual StorePath addToStoreFromDump(Source & dump, const string & name,
FileIngestionMethod method = FileIngestionMethod::Recursive, HashType hashAlgo = htSHA256, RepairFlag repair = NoRepair)
{
throw Error("addToStoreFromDump() is not supported by this store");
@ -609,7 +615,7 @@ public:
that will be substituted. */
virtual void queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize);
uint64_t & downloadSize, uint64_t & narSize);
/* Sort a set of paths topologically under the references
relation. If p refers to q, then p precedes q in this list. */
@ -739,11 +745,13 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
/* Copy store paths from one store to another. The paths may be copied
in parallel. They are copied in a topologically sorted order
(i.e. if A is a reference of B, then A is copied before B), but
the set of store paths is not automatically closed; use
copyClosure() for that. */
void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const StorePathSet & storePaths,
in parallel. They are copied in a topologically sorted order (i.e.
if A is a reference of B, then A is copied before B), but the set
of store paths is not automatically closed; use copyClosure() for
that. Returns a map of what each path was copied to the dstStore
as. */
std::map<StorePath, StorePath> copyPaths(ref<Store> srcStore, ref<Store> dstStore,
const StorePathSet & storePaths,
RepairFlag repair = NoRepair,
CheckSigsFlag checkSigs = CheckSigs,
SubstituteFlag substitute = NoSubstitute);
@ -842,4 +850,6 @@ std::optional<ValidPathInfo> decodeValidPathInfo(
/* Split URI into protocol+hierarchy part and its parameter set. */
std::pair<std::string, Store::Params> splitUriAndParams(const std::string & uri);
std::optional<ContentAddress> getDerivationCA(const BasicDerivation & drv);
}

6
src/libstore/worker-protocol.hh
View file

@ -6,7 +6,7 @@ namespace nix {
#define WORKER_MAGIC_1 0x6e697863
#define WORKER_MAGIC_2 0x6478696f
#define PROTOCOL_VERSION 0x116
#define PROTOCOL_VERSION 0x117
#define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)
@ -70,6 +70,10 @@ template<class T> T readStorePaths(const Store & store, Source & from);
void writeStorePaths(const Store & store, Sink & out, const StorePathSet & paths);
StorePathCAMap readStorePathCAMap(const Store & store, Source & from);
void writeStorePathCAMap(const Store & store, Sink & out, const StorePathCAMap & paths);
void writeOutputPathMap(const Store & store, Sink & out, const OutputPathMap & paths);
}

10
src/libutil/archive.cc
View file

@ -150,17 +150,17 @@ static void skipGeneric(Source & source)
static void parseContents(ParseSink & sink, Source & source, const Path & path)
{
unsigned long long size = readLongLong(source);
uint64_t size = readLongLong(source);
sink.preallocateContents(size);
unsigned long long left = size;
uint64_t left = size;
std::vector<unsigned char> buf(65536);
while (left) {
checkInterrupt();
auto n = buf.size();
if ((unsigned long long)n > left) n = left;
if ((uint64_t)n > left) n = left;
source(buf.data(), n);
sink.receiveContents(buf.data(), n);
left -= n;
@ -323,7 +323,7 @@ struct RestoreSink : ParseSink
throw SysError("fchmod");
}
void preallocateContents(unsigned long long len)
void preallocateContents(uint64_t len)
{
#if HAVE_POSIX_FALLOCATE
if (len) {
@ -338,7 +338,7 @@ struct RestoreSink : ParseSink
#endif
}
void receiveContents(unsigned char * data, unsigned int len)
void receiveContents(unsigned char * data, size_t len)
{
writeFull(fd.get(), data, len);
}

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