lix-project/lix-releng-staging
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Merge remote-tracking branch 'origin/master' into cross-jobs

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This commit is contained in:
Matthew Bauer 2021-06-25 15:51:02 -05:00
parent d5fd0f4745 bf68c693dc
commit c3a929349f
204 changed files with 25777 additions and 2334 deletions
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2
.github/STALE-BOT.md vendored
View file

@ -3,7 +3,7 @@
- Thanks for your contribution!
- To remove the stale label, just leave a new comment.
- _How to find the right people to ping?_ → [`git blame`](https://git-scm.com/docs/git-blame) to the rescue! (or GitHub's history and blame buttons.)
- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/) or on the [#nixos IRC channel](https://webchat.freenode.net/#nixos).
- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/) or on [Matrix - #nix:nixos.org](https://matrix.to/#/#nix:nixos.org).
## Suggestions for PRs

46
.github/workflows/test.yml vendored
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@ -8,52 +8,62 @@ jobs:
matrix:
os: [ubuntu-latest, macos-latest]
runs-on: ${{ matrix.os }}
env:
CACHIX_NAME: nix-ci
steps:
- uses: actions/checkout@v2.3.4
with:
fetch-depth: 0
- uses: cachix/install-nix-action@v12
- uses: cachix/cachix-action@v8
- uses: cachix/install-nix-action@v13
- run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
- uses: cachix/cachix-action@v10
with:
name: '${{ env.CACHIX_NAME }}'
signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
#- run: nix flake check
- run: nix-build -A checks.$(if [[ `uname` = Linux ]]; then echo x86_64-linux; else echo x86_64-darwin; fi)
installer:
if: github.event_name == 'push'
needs: tests
check_cachix:
name: Cachix secret present for installer tests
runs-on: ubuntu-latest
outputs:
secret: ${{ steps.secret.outputs.secret }}
steps:
- name: Check for Cachix secret
id: secret
env:
_CACHIX_SECRETS: ${{ secrets.CACHIX_SIGNING_KEY }}${{ secrets.CACHIX_AUTH_TOKEN }}
run: echo "::set-output name=secret::${{ env._CACHIX_SECRETS != '' }}"
installer:
needs: [tests, check_cachix]
if: github.event_name == 'push' && needs.check_cachix.outputs.secret == 'true'
runs-on: ubuntu-latest
env:
CACHIX_NAME: nix-ci
outputs:
installerURL: ${{ steps.prepare-installer.outputs.installerURL }}
steps:
- uses: actions/checkout@v2.3.4
with:
fetch-depth: 0
- uses: cachix/install-nix-action@v12
- uses: cachix/cachix-action@v8
- run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
- uses: cachix/install-nix-action@v13
- uses: cachix/cachix-action@v10
with:
name: '${{ env.CACHIX_NAME }}'
signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
- id: prepare-installer
run: scripts/prepare-installer-for-github-actions
installer_test:
if: github.event_name == 'push'
needs: installer
needs: [installer, check_cachix]
if: github.event_name == 'push' && needs.check_cachix.outputs.secret == 'true'
strategy:
matrix:
os: [ubuntu-latest, macos-latest]
runs-on: ${{ matrix.os }}
env:
CACHIX_NAME: nix-ci
steps:
- uses: actions/checkout@v2.3.4
- uses: cachix/install-nix-action@master
- run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
- uses: cachix/install-nix-action@v13
with:
install_url: '${{needs.installer.outputs.installerURL}}'
install_options: '--tarball-url-prefix https://${{ env.CACHIX_NAME }}.cachix.org/serve'
install_options: "--tarball-url-prefix https://${{ env.CACHIX_NAME }}.cachix.org/serve"
- run: nix-instantiate -E 'builtins.currentTime' --eval

1
.gitignore vendored
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@ -82,6 +82,7 @@ perl/Makefile.config
/tests/shell
/tests/shell.drv
/tests/config.nix
/tests/ca/config.nix
# /tests/lang/
/tests/lang/*.out

1
Makefile
View file

@ -12,6 +12,7 @@ makefiles = \
src/resolve-system-dependencies/local.mk \
scripts/local.mk \
misc/bash/local.mk \
misc/zsh/local.mk \
misc/systemd/local.mk \
misc/launchd/local.mk \
misc/upstart/local.mk \

1
Makefile.config.in
View file

@ -15,7 +15,6 @@ LDFLAGS = @LDFLAGS@
LIBARCHIVE_LIBS = @LIBARCHIVE_LIBS@
LIBBROTLI_LIBS = @LIBBROTLI_LIBS@
LIBCURL_LIBS = @LIBCURL_LIBS@
LIBLZMA_LIBS = @LIBLZMA_LIBS@
OPENSSL_LIBS = @OPENSSL_LIBS@
LIBSECCOMP_LIBS = @LIBSECCOMP_LIBS@
PACKAGE_NAME = @PACKAGE_NAME@

3
README.md
View file

@ -28,7 +28,8 @@ build nix from source with nix-build or how to get a development environment.
- [Nix manual](https://nixos.org/nix/manual)
- [Nix jobsets on hydra.nixos.org](https://hydra.nixos.org/project/nix)
- [NixOS Discourse](https://discourse.nixos.org/)
- [IRC - #nixos on freenode.net](irc://irc.freenode.net/#nixos)
- [Matrix - #nix:nixos.org](https://matrix.to/#/#nix:nixos.org)
- [IRC - #nixos on libera.chat](irc://irc.libera.chat/#nixos)
## License

20
config/config.guess vendored
View file

@ -1,8 +1,8 @@
#! /bin/sh
# Attempt to guess a canonical system name.
# Copyright 1992-2020 Free Software Foundation, Inc.
# Copyright 1992-2021 Free Software Foundation, Inc.
timestamp='2020-11-19'
timestamp='2021-01-25'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@ -50,7 +50,7 @@ version="\
GNU config.guess ($timestamp)
Originally written by Per Bothner.
Copyright 1992-2020 Free Software Foundation, Inc.
Copyright 1992-2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@ -188,10 +188,9 @@ case "$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
#
# Note: NetBSD doesn't particularly care about the vendor
# portion of the name. We always set it to "unknown".
sysctl="sysctl -n hw.machine_arch"
UNAME_MACHINE_ARCH=$( (uname -p 2>/dev/null || \
"/sbin/$sysctl" 2>/dev/null || \
"/usr/sbin/$sysctl" 2>/dev/null || \
/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
/usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
echo unknown))
case "$UNAME_MACHINE_ARCH" in
aarch64eb) machine=aarch64_be-unknown ;;
@ -996,6 +995,9 @@ EOF
k1om:Linux:*:*)
echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
exit ;;
loongarch32:Linux:*:* | loongarch64:Linux:*:* | loongarchx32:Linux:*:*)
echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
exit ;;
m32r*:Linux:*:*)
echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
exit ;;
@ -1084,7 +1086,7 @@ EOF
ppcle:Linux:*:*)
echo powerpcle-unknown-linux-"$LIBC"
exit ;;
riscv32:Linux:*:* | riscv64:Linux:*:*)
riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*)
echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
exit ;;
s390:Linux:*:* | s390x:Linux:*:*)
@ -1480,8 +1482,8 @@ EOF
i*86:rdos:*:*)
echo "$UNAME_MACHINE"-pc-rdos
exit ;;
i*86:AROS:*:*)
echo "$UNAME_MACHINE"-pc-aros
*:AROS:*:*)
echo "$UNAME_MACHINE"-unknown-aros
exit ;;
x86_64:VMkernel:*:*)
echo "$UNAME_MACHINE"-unknown-esx

20
config/config.sub vendored
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@ -1,8 +1,8 @@
#! /bin/sh
# Configuration validation subroutine script.
# Copyright 1992-2020 Free Software Foundation, Inc.
# Copyright 1992-2021 Free Software Foundation, Inc.
timestamp='2020-12-02'
timestamp='2021-01-08'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@ -67,7 +67,7 @@ Report bugs and patches to <config-patches@gnu.org>."
version="\
GNU config.sub ($timestamp)
Copyright 1992-2020 Free Software Foundation, Inc.
Copyright 1992-2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@ -1185,6 +1185,7 @@ case $cpu-$vendor in
| k1om \
| le32 | le64 \
| lm32 \
| loongarch32 | loongarch64 | loongarchx32 \
| m32c | m32r | m32rle \
| m5200 | m68000 | m680[012346]0 | m68360 | m683?2 | m68k \
| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
@ -1229,7 +1230,7 @@ case $cpu-$vendor in
| powerpc | powerpc64 | powerpc64le | powerpcle | powerpcspe \
| pru \
| pyramid \
| riscv | riscv32 | riscv64 \
| riscv | riscv32 | riscv32be | riscv64 | riscv64be \
| rl78 | romp | rs6000 | rx \
| s390 | s390x \
| score \
@ -1682,11 +1683,14 @@ fi
# Now, validate our (potentially fixed-up) OS.
case $os in
# Sometimes we do "kernel-abi", so those need to count as OSes.
# Sometimes we do "kernel-libc", so those need to count as OSes.
musl* | newlib* | uclibc*)
;;
# Likewise for "kernel-libc"
eabi | eabihf | gnueabi | gnueabihf)
# Likewise for "kernel-abi"
eabi* | gnueabi*)
;;
# VxWorks passes extra cpu info in the 4th filed.
simlinux | simwindows | spe)
;;
# Now accept the basic system types.
# The portable systems comes first.
@ -1750,6 +1754,8 @@ case $kernel-$os in
;;
kfreebsd*-gnu* | kopensolaris*-gnu*)
;;
vxworks-simlinux | vxworks-simwindows | vxworks-spe)
;;
nto-qnx*)
;;
os2-emx)

61
configure.ac
View file

@ -1,4 +1,4 @@
AC_INIT(nix, m4_esyscmd([bash -c "echo -n $(cat ./.version)$VERSION_SUFFIX"]))
AC_INIT([nix],[m4_esyscmd(bash -c "echo -n $(cat ./.version)$VERSION_SUFFIX")])
AC_CONFIG_MACRO_DIRS([m4])
AC_CONFIG_SRCDIR(README.md)
AC_CONFIG_AUX_DIR(config)
@ -9,8 +9,7 @@ AC_PROG_SED
AC_CANONICAL_HOST
AC_MSG_CHECKING([for the canonical Nix system name])
AC_ARG_WITH(system, AC_HELP_STRING([--with-system=SYSTEM],
[Platform identifier (e.g., `i686-linux').]),
AC_ARG_WITH(system, AS_HELP_STRING([--with-system=SYSTEM],[Platform identifier (e.g., `i686-linux').]),
[system=$withval],
[case "$host_cpu" in
i*86)
@ -66,7 +65,7 @@ AC_SYS_LARGEFILE
AC_STRUCT_DIRENT_D_TYPE
if test "$sys_name" = sunos; then
# Solaris requires -lsocket -lnsl for network functions
LIBS="-lsocket -lnsl $LIBS"
LDFLAGS="-lsocket -lnsl $LDFLAGS"
fi
@ -127,8 +126,7 @@ NEED_PROG(jq, jq)
AC_SUBST(coreutils, [$(dirname $(type -p cat))])
AC_ARG_WITH(store-dir, AC_HELP_STRING([--with-store-dir=PATH],
[path of the Nix store (defaults to /nix/store)]),
AC_ARG_WITH(store-dir, AS_HELP_STRING([--with-store-dir=PATH],[path of the Nix store (defaults to /nix/store)]),
storedir=$withval, storedir='/nix/store')
AC_SUBST(storedir)
@ -152,13 +150,12 @@ int main() {
}]])], GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=no, GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=yes)
AC_MSG_RESULT($GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC)
if test "x$GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC" = xyes; then
LDFLAGS="$LDFLAGS -latomic"
LDFLAGS="-latomic $LDFLAGS"
fi
PKG_PROG_PKG_CONFIG
AC_ARG_ENABLE(shared, AC_HELP_STRING([--enable-shared],
[Build shared libraries for Nix [default=yes]]),
AC_ARG_ENABLE(shared, AS_HELP_STRING([--enable-shared],[Build shared libraries for Nix [default=yes]]),
shared=$enableval, shared=yes)
if test "$shared" = yes; then
AC_SUBST(BUILD_SHARED_LIBS, 1, [Whether to build shared libraries.])
@ -172,11 +169,6 @@ fi
PKG_CHECK_MODULES([OPENSSL], [libcrypto], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"])
# Look for libbz2, a required dependency.
AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [true],
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://sourceware.org/bzip2/.])])
AC_CHECK_HEADERS([bzlib.h], [true],
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://sourceware.org/bzip2/.])])
# Checks for libarchive
PKG_CHECK_MODULES([LIBARCHIVE], [libarchive >= 3.1.2], [CXXFLAGS="$LIBARCHIVE_CFLAGS $CXXFLAGS"])
# Workaround until https://github.com/libarchive/libarchive/issues/1446 is fixed
@ -205,16 +197,6 @@ PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLA
# Look for libsodium, an optional dependency.
PKG_CHECK_MODULES([SODIUM], [libsodium], [CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"])
# Look for liblzma, a required dependency.
PKG_CHECK_MODULES([LIBLZMA], [liblzma], [CXXFLAGS="$LIBLZMA_CFLAGS $CXXFLAGS"])
AC_CHECK_LIB([lzma], [lzma_stream_encoder_mt],
[AC_DEFINE([HAVE_LZMA_MT], [1], [xz multithreaded compression support])])
# Look for zlib, a required dependency.
PKG_CHECK_MODULES([ZLIB], [zlib], [CXXFLAGS="$ZLIB_CFLAGS $CXXFLAGS"])
AC_CHECK_HEADER([zlib.h],[:],[AC_MSG_ERROR([could not find the zlib.h header])])
LDFLAGS="-lz $LDFLAGS"
# Look for libbrotli{enc,dec}.
PKG_CHECK_MODULES([LIBBROTLI], [libbrotlienc libbrotlidec], [CXXFLAGS="$LIBBROTLI_CFLAGS $CXXFLAGS"])
@ -230,9 +212,8 @@ AC_SUBST(HAVE_LIBCPUID, [$have_libcpuid])
# Look for libseccomp, required for Linux sandboxing.
if test "$sys_name" = linux; then
AC_ARG_ENABLE([seccomp-sandboxing],
AC_HELP_STRING([--disable-seccomp-sandboxing],
[Don't build support for seccomp sandboxing (only recommended if your arch doesn't support libseccomp yet!)]
))
AS_HELP_STRING([--disable-seccomp-sandboxing],[Don't build support for seccomp sandboxing (only recommended if your arch doesn't support libseccomp yet!)
]))
if test "x$enable_seccomp_sandboxing" != "xno"; then
PKG_CHECK_MODULES([LIBSECCOMP], [libseccomp],
[CXXFLAGS="$LIBSECCOMP_CFLAGS $CXXFLAGS"])
@ -250,8 +231,8 @@ AC_SUBST(HAVE_SECCOMP, [$have_seccomp])
# Look for aws-cpp-sdk-s3.
AC_LANG_PUSH(C++)
AC_CHECK_HEADERS([aws/s3/S3Client.h],
[AC_DEFINE([ENABLE_S3], [1], [Whether to enable S3 support via aws-sdk-cpp.])
enable_s3=1], [enable_s3=])
[AC_DEFINE([ENABLE_S3], [1], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=1],
[AC_DEFINE([ENABLE_S3], [0], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=])
AC_SUBST(ENABLE_S3, [$enable_s3])
AC_LANG_POP(C++)
@ -264,8 +245,7 @@ fi
# Whether to use the Boehm garbage collector.
AC_ARG_ENABLE(gc, AC_HELP_STRING([--enable-gc],
[enable garbage collection in the Nix expression evaluator (requires Boehm GC) [default=yes]]),
AC_ARG_ENABLE(gc, AS_HELP_STRING([--enable-gc],[enable garbage collection in the Nix expression evaluator (requires Boehm GC) [default=yes]]),
gc=$enableval, gc=yes)
if test "$gc" = yes; then
PKG_CHECK_MODULES([BDW_GC], [bdw-gc])
@ -279,8 +259,7 @@ PKG_CHECK_MODULES([GTEST], [gtest_main])
# documentation generation switch
AC_ARG_ENABLE(doc-gen, AC_HELP_STRING([--disable-doc-gen],
[disable documentation generation]),
AC_ARG_ENABLE(doc-gen, AS_HELP_STRING([--disable-doc-gen],[disable documentation generation]),
doc_generate=$enableval, doc_generate=yes)
AC_SUBST(doc_generate)
@ -300,19 +279,7 @@ if test "$(uname)" = "Darwin"; then
fi
# Do we have GNU tar?
AC_MSG_CHECKING([if you have a recent GNU tar])
if $tar --version 2> /dev/null | grep -q GNU && tar cvf /dev/null --warning=no-timestamp ./config.log > /dev/null; then
AC_MSG_RESULT(yes)
tarFlags="--warning=no-timestamp"
else
AC_MSG_RESULT(no)
fi
AC_SUBST(tarFlags)
AC_ARG_WITH(sandbox-shell, AC_HELP_STRING([--with-sandbox-shell=PATH],
[path of a statically-linked shell to use as /bin/sh in sandboxes]),
AC_ARG_WITH(sandbox-shell, AS_HELP_STRING([--with-sandbox-shell=PATH],[path of a statically-linked shell to use as /bin/sh in sandboxes]),
sandbox_shell=$withval)
AC_SUBST(sandbox_shell)
@ -327,6 +294,6 @@ done
rm -f Makefile.config
AC_CONFIG_HEADER([config.h])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([])
AC_OUTPUT

8
doc/manual/local.mk
View file

@ -25,19 +25,19 @@ nix-eval = $(dummy-env) $(bindir)/nix eval --experimental-features nix-command -
$(d)/%.1: $(d)/src/command-ref/%.md
@printf "Title: %s\n\n" "$$(basename $@ .1)" > $^.tmp
@cat $^ >> $^.tmp
$(trace-gen) lowdown -sT man $^.tmp -o $@
$(trace-gen) lowdown -sT man -M section=1 $^.tmp -o $@
@rm $^.tmp
$(d)/%.8: $(d)/src/command-ref/%.md
@printf "Title: %s\n\n" "$$(basename $@ .8)" > $^.tmp
@cat $^ >> $^.tmp
$(trace-gen) lowdown -sT man $^.tmp -o $@
$(trace-gen) lowdown -sT man -M section=8 $^.tmp -o $@
@rm $^.tmp
$(d)/nix.conf.5: $(d)/src/command-ref/conf-file.md
@printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp
@cat $^ >> $^.tmp
$(trace-gen) lowdown -sT man $^.tmp -o $@
$(trace-gen) lowdown -sT man -M section=5 $^.tmp -o $@
@rm $^.tmp
$(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli
@ -80,7 +80,7 @@ install: $(d)/src/command-ref/new-cli
if [[ $$name = SUMMARY ]]; then continue; fi; \
printf "Title: %s\n\n" "$$name" > $$i.tmp; \
cat $$i >> $$i.tmp; \
lowdown -sT man $$i.tmp -o $(mandir)/man1/$$name.1; \
lowdown -sT man -M section=1 $$i.tmp -o $(mandir)/man1/$$name.1; \
done
$(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/command-ref/conf-file.md $(d)/src/expressions/builtins.md

4
doc/manual/src/advanced-topics/cores-vs-jobs.md
View file

@ -4,13 +4,13 @@ Nix has two relevant settings with regards to how your CPU cores will
be utilized: `cores` and `max-jobs`. This chapter will talk about what
they are, how they interact, and their configuration trade-offs.
- `max-jobs`
- `max-jobs`\
Dictates how many separate derivations will be built at the same
time. If you set this to zero, the local machine will do no
builds. Nix will still substitute from binary caches, and build
remotely if remote builders are configured.
- `cores`
- `cores`\
Suggests how many cores each derivation should use. Similar to
`make -j`.

72
doc/manual/src/command-ref/env-common.md
View file

@ -2,45 +2,49 @@
Most Nix commands interpret the following environment variables:
- `IN_NIX_SHELL`
- `IN_NIX_SHELL`\
Indicator that tells if the current environment was set up by
`nix-shell`. Since Nix 2.0 the values are `"pure"` and `"impure"`
- `NIX_PATH`
- `NIX_PATH`\
A colon-separated list of directories used to look up Nix
expressions enclosed in angle brackets (i.e., `<path>`). For
instance, the value
/home/eelco/Dev:/etc/nixos
will cause Nix to look for paths relative to `/home/eelco/Dev` and
`/etc/nixos`, in this order. It is also possible to match paths
against a prefix. For example, the value
nixpkgs=/home/eelco/Dev/nixpkgs-branch:/etc/nixos
will cause Nix to search for `<nixpkgs/path>` in
`/home/eelco/Dev/nixpkgs-branch/path` and `/etc/nixos/nixpkgs/path`.
If a path in the Nix search path starts with `http://` or
`https://`, it is interpreted as the URL of a tarball that will be
downloaded and unpacked to a temporary location. The tarball must
consist of a single top-level directory. For example, setting
`NIX_PATH` to
nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-15.09.tar.gz
tells Nix to download the latest revision in the Nixpkgs/NixOS 15.09
channel.
A following shorthand can be used to refer to the official channels:
nixpkgs=channel:nixos-15.09
The search path can be extended using the `-I` option, which takes
precedence over `NIX_PATH`.
- `NIX_IGNORE_SYMLINK_STORE`
nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
tells Nix to download and use the current contents of the
`master` branch in the `nixpkgs` repository.
The URLs of the tarballs from the official nixos.org channels (see
[the manual for `nix-channel`](nix-channel.md)) can be abbreviated
as `channel:<channel-name>`. For instance, the following two
values of `NIX_PATH` are equivalent:
nixpkgs=channel:nixos-21.05
nixpkgs=https://nixos.org/channels/nixos-21.05/nixexprs.tar.xz
The Nix search path can also be extended using the `-I` option to
many Nix commands, which takes precedence over `NIX_PATH`.
- `NIX_IGNORE_SYMLINK_STORE`\
Normally, the Nix store directory (typically `/nix/store`) is not
allowed to contain any symlink components. This is to prevent
“impure” builds. Builders sometimes “canonicalise” paths by
@ -50,7 +54,7 @@ Most Nix commands interpret the following environment variables:
builds are deployed to machines where `/nix/store` resolves
differently. If you are sure that you’re not going to do that, you
can set `NIX_IGNORE_SYMLINK_STORE` to `1`.
Note that if you’re symlinking the Nix store so that you can put it
on another file system than the root file system, on Linux you’re
better off using `bind` mount points, e.g.,
@ -59,44 +63,44 @@ Most Nix commands interpret the following environment variables:
$ mkdir /nix
$ mount -o bind /mnt/otherdisk/nix /nix
```
Consult the mount 8 manual page for details.
- `NIX_STORE_DIR`
- `NIX_STORE_DIR`\
Overrides the location of the Nix store (default `prefix/store`).
- `NIX_DATA_DIR`
- `NIX_DATA_DIR`\
Overrides the location of the Nix static data directory (default
`prefix/share`).
- `NIX_LOG_DIR`
- `NIX_LOG_DIR`\
Overrides the location of the Nix log directory (default
`prefix/var/log/nix`).
- `NIX_STATE_DIR`
- `NIX_STATE_DIR`\
Overrides the location of the Nix state directory (default
`prefix/var/nix`).
- `NIX_CONF_DIR`
- `NIX_CONF_DIR`\
Overrides the location of the system Nix configuration directory
(default `prefix/etc/nix`).
- `NIX_CONFIG`
- `NIX_CONFIG`\
Applies settings from Nix configuration from the environment.
The content is treated as if it was read from a Nix configuration file.
Settings are separated by the newline character.
- `NIX_USER_CONF_FILES`
- `NIX_USER_CONF_FILES`\
Overrides the location of the user Nix configuration files to load
from (defaults to the XDG spec locations). The variable is treated
as a list separated by the `:` token.
- `TMPDIR`
- `TMPDIR`\
Use the specified directory to store temporary files. In particular,
this includes temporary build directories; these can take up
substantial amounts of disk space. The default is `/tmp`.
- `NIX_REMOTE`
- `NIX_REMOTE`\
This variable should be set to `daemon` if you want to use the Nix
daemon to execute Nix operations. This is necessary in [multi-user
Nix installations](../installation/multi-user.md). If the Nix
@ -104,16 +108,16 @@ Most Nix commands interpret the following environment variables:
should be set to `unix://path/to/socket`. Otherwise, it should be
left unset.
- `NIX_SHOW_STATS`
- `NIX_SHOW_STATS`\
If set to `1`, Nix will print some evaluation statistics, such as
the number of values allocated.
- `NIX_COUNT_CALLS`
- `NIX_COUNT_CALLS`\
If set to `1`, Nix will print how often functions were called during
Nix expression evaluation. This is useful for profiling your Nix
expressions.
- `GC_INITIAL_HEAP_SIZE`
- `GC_INITIAL_HEAP_SIZE`\
If Nix has been configured to use the Boehm garbage collector, this
variable sets the initial size of the heap in bytes. It defaults to
384 MiB. Setting it to a low value reduces memory consumption, but

6
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@ -47,16 +47,16 @@ All options not listed here are passed to `nix-store
--realise`, except for `--arg` and `--attr` / `-A` which are passed to
`nix-instantiate`.
- `--no-out-link`
- `--no-out-link`\
Do not create a symlink to the output path. Note that as a result
the output does not become a root of the garbage collector, and so
might be deleted by `nix-store
--gc`.
- `--dry-run`
- `--dry-run`\
Show what store paths would be built or downloaded.
- `--out-link` / `-o` *outlink*
- `--out-link` / `-o` *outlink*\
Change the name of the symlink to the output path created from
`result` to *outlink*.

16
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@ -17,26 +17,26 @@ To see the list of official NixOS channels, visit
This command has the following operations:
- `--add` *url* \[*name*\]
- `--add` *url* \[*name*\]\
Adds a channel named *name* with URL *url* to the list of subscribed
channels. If *name* is omitted, it defaults to the last component of
*url*, with the suffixes `-stable` or `-unstable` removed.
- `--remove` *name*
- `--remove` *name*\
Removes the channel named *name* from the list of subscribed
channels.
- `--list`
- `--list`\
Prints the names and URLs of all subscribed channels on standard
output.
- `--update` \[*names*…\]
- `--update` \[*names*…\]\
Downloads the Nix expressions of all subscribed channels (or only
those included in *names* if specified) and makes them the default
for `nix-env` operations (by symlinking them from the directory
`~/.nix-defexpr`).
- `--rollback` \[*generation*\]
- `--rollback` \[*generation*\]\
Reverts the previous call to `nix-channel
--update`. Optionally, you can specify a specific channel generation
number to restore.
@ -70,14 +70,14 @@ $ nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
# Files
- `/nix/var/nix/profiles/per-user/username/channels`
- `/nix/var/nix/profiles/per-user/username/channels`\
`nix-channel` uses a `nix-env` profile to keep track of previous
versions of the subscribed channels. Every time you run `nix-channel
--update`, a new channel generation (that is, a symlink to the
channel Nix expressions in the Nix store) is created. This enables
`nix-channel --rollback` to revert to previous versions.
- `~/.nix-defexpr/channels`
- `~/.nix-defexpr/channels`\
This is a symlink to
`/nix/var/nix/profiles/per-user/username/channels`. It ensures that
`nix-env` can find your channels. In a multi-user installation, you
@ -89,7 +89,7 @@ $ nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
A channel URL should point to a directory containing the following
files:
- `nixexprs.tar.xz`
- `nixexprs.tar.xz`\
A tarball containing Nix expressions and files referenced by them
(such as build scripts and patches). At the top level, the tarball
should contain a single directory. That directory must contain a

14
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@ -35,21 +35,21 @@ and second to send the dump of those paths. If this bothers you, use
# Options
- `--to`
- `--to`\
Copy the closure of _paths_ from the local Nix store to the Nix
store on _machine_. This is the default.
- `--from`
- `--from`\
Copy the closure of _paths_ from the Nix store on _machine_ to the
local Nix store.
- `--gzip`
- `--gzip`\
Enable compression of the SSH connection.
- `--include-outputs`
- `--include-outputs`\
Also copy the outputs of store derivations included in the closure.
- `--use-substitutes` / `-s`
- `--use-substitutes` / `-s`\
Attempt to download missing paths on the target machine using Nix’s
substitute mechanism. Any paths that cannot be substituted on the
target are still copied normally from the source. This is useful,
@ -58,12 +58,12 @@ and second to send the dump of those paths. If this bothers you, use
`nixos.org` (the default binary cache server) is
fast.
- `-v`
- `-v`\
Show verbose output.
# Environment variables
- `NIX_SSHOPTS`
- `NIX_SSHOPTS`\
Additional options to be passed to `ssh` on the command
line.

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@ -36,27 +36,27 @@ case-sensitive. The regular expression can optionally be followed by a
dash and a version number; if omitted, any version of the package will
match. Here are some examples:
- `firefox`
- `firefox`\
Matches the package name `firefox` and any version.
- `firefox-32.0`
- `firefox-32.0`\
Matches the package name `firefox` and version `32.0`.
- `gtk\\+`
- `gtk\\+`\
Matches the package name `gtk+`. The `+` character must be escaped
using a backslash to prevent it from being interpreted as a
quantifier, and the backslash must be escaped in turn with another
backslash to ensure that the shell passes it on.
- `.\*`
- `.\*`\
Matches any package name. This is the default for most commands.
- `'.*zip.*'`
- `'.*zip.*'`\
Matches any package name containing the string `zip`. Note the dots:
`'*zip*'` does not work, because in a regular expression, the
character `*` is interpreted as a quantifier.
- `'.*(firefox|chromium).*'`
- `'.*(firefox|chromium).*'`\
Matches any package name containing the strings `firefox` or
`chromium`.
@ -66,7 +66,7 @@ This section lists the options that are common to all operations. These
options are allowed for every subcommand, though they may not always
have an effect.
- `--file` / `-f` *path*
- `--file` / `-f` *path*\
Specifies the Nix expression (designated below as the *active Nix
expression*) used by the `--install`, `--upgrade`, and `--query
--available` operations to obtain derivations. The default is
@ -77,13 +77,13 @@ have an effect.
unpacked to a temporary location. The tarball must include a single
top-level directory containing at least a file named `default.nix`.
- `--profile` / `-p` *path*
- `--profile` / `-p` *path*\
Specifies the profile to be used by those operations that operate on
a profile (designated below as the *active profile*). A profile is a
sequence of user environments called *generations*, one of which is
the *current generation*.
- `--dry-run`
- `--dry-run`\
For the `--install`, `--upgrade`, `--uninstall`,
`--switch-generation`, `--delete-generations` and `--rollback`
operations, this flag will cause `nix-env` to print what *would* be
@ -93,7 +93,7 @@ have an effect.
[substituted](../glossary.md) (i.e., downloaded) and which paths
will be built from source (because no substitute is available).
- `--system-filter` *system*
- `--system-filter` *system*\
By default, operations such as `--query
--available` show derivations matching any platform. This option
allows you to use derivations for the specified platform *system*.
@ -102,7 +102,7 @@ have an effect.
# Files
- `~/.nix-defexpr`
- `~/.nix-defexpr`\
The source for the default Nix expressions used by the
`--install`, `--upgrade`, and `--query --available` operations to
obtain derivations. The `--file` option may be used to override
@ -140,7 +140,7 @@ have an effect.
The command `nix-channel` places symlinks to the downloaded Nix
expressions from each subscribed channel in this directory.
- `~/.nix-profile`
- `~/.nix-profile`\
A symbolic link to the user's current profile. By default, this
symlink points to `prefix/var/nix/profiles/default`. The `PATH`
environment variable should include `~/.nix-profile/bin` for the
@ -217,13 +217,13 @@ a number of possible ways:
## Flags
- `--prebuilt-only` / `-b`
- `--prebuilt-only` / `-b`\
Use only derivations for which a substitute is registered, i.e.,
there is a pre-built binary available that can be downloaded in lieu
of building the derivation. Thus, no packages will be built from
source.
- `--preserve-installed`; `-P`
- `--preserve-installed`; `-P`\
Do not remove derivations with a name matching one of the
derivations being installed. Usually, trying to have two versions of
the same package installed in the same generation of a profile will
@ -231,7 +231,7 @@ a number of possible ways:
clashes between the two versions. However, this is not the case for
all packages.
- `--remove-all`; `-r`
- `--remove-all`; `-r`\
Remove all previously installed packages first. This is equivalent
to running `nix-env -e '.*'` first, except that everything happens
in a single transaction.
@ -346,24 +346,24 @@ version is installed.
## Flags
- `--lt`
- `--lt`\
Only upgrade a derivation to newer versions. This is the default.
- `--leq`
- `--leq`\
In addition to upgrading to newer versions, also “upgrade” to
derivations that have the same version. Version are not a unique
identification of a derivation, so there may be many derivations
that have the same version. This flag may be useful to force
“synchronisation” between the installed and available derivations.
- `--eq`
- `--eq`\
*Only* “upgrade” to derivations that have the same version. This may
not seem very useful, but it actually is, e.g., when there is a new
release of Nixpkgs and you want to replace installed applications
with the same versions built against newer dependencies (to reduce
the number of dependencies floating around on your system).
- `--always`
- `--always`\
In addition to upgrading to newer versions, also “upgrade” to
derivations that have the same or a lower version. I.e., derivations
may actually be downgraded depending on what is available in the
@ -578,11 +578,11 @@ The derivations are sorted by their `name` attributes.
The following flags specify the set of things on which the query
operates.
- `--installed`
- `--installed`\
The query operates on the store paths that are installed in the
current generation of the active profile. This is the default.
- `--available`; `-a`
- `--available`; `-a`\
The query operates on the derivations that are available in the
active Nix expression.
@ -593,24 +593,24 @@ selected derivations. Multiple flags may be specified, in which case the
information is shown in the order given here. Note that the name of the
derivation is shown unless `--no-name` is specified.
- `--xml`
- `--xml`\
Print the result in an XML representation suitable for automatic
processing by other tools. The root element is called `items`, which
contains a `item` element for each available or installed
derivation. The fields discussed below are all stored in attributes
of the `item` elements.
- `--json`
- `--json`\
Print the result in a JSON representation suitable for automatic
processing by other tools.
- `--prebuilt-only` / `-b`
- `--prebuilt-only` / `-b`\
Show only derivations for which a substitute is registered, i.e.,
there is a pre-built binary available that can be downloaded in lieu
of building the derivation. Thus, this shows all packages that
probably can be installed quickly.
- `--status`; `-s`
- `--status`; `-s`\
Print the *status* of the derivation. The status consists of three
characters. The first is `I` or `-`, indicating whether the
derivation is currently installed in the current generation of the
@ -621,49 +621,49 @@ derivation is shown unless `--no-name` is specified.
derivation to be built. The third is `S` or `-`, indicating whether
a substitute is available for the derivation.
- `--attr-path`; `-P`
- `--attr-path`; `-P`\
Print the *attribute path* of the derivation, which can be used to
unambiguously select it using the `--attr` option available in
commands that install derivations like `nix-env --install`. This
option only works together with `--available`
- `--no-name`
- `--no-name`\
Suppress printing of the `name` attribute of each derivation.
- `--compare-versions` / `-c`
- `--compare-versions` / `-c`\
Compare installed versions to available versions, or vice versa (if
`--available` is given). This is useful for quickly seeing whether
upgrades for installed packages are available in a Nix expression. A
column is added with the following meaning:
- `<` *version*
- `<` *version*\
A newer version of the package is available or installed.
- `=` *version*
- `=` *version*\
At most the same version of the package is available or
installed.
- `>` *version*
- `>` *version*\
Only older versions of the package are available or installed.
- `- ?`
- `- ?`\
No version of the package is available or installed.
- `--system`
- `--system`\
Print the `system` attribute of the derivation.
- `--drv-path`
- `--drv-path`\
Print the path of the store derivation.
- `--out-path`
- `--out-path`\
Print the output path of the derivation.
- `--description`
- `--description`\
Print a short (one-line) description of the derivation, if
available. The description is taken from the `meta.description`
attribute of the derivation.
- `--meta`
- `--meta`\
Print all of the meta-attributes of the derivation. This option is
only available with `--xml` or `--json`.
@ -874,7 +874,7 @@ error: no generation older than the current (91) exists
# Environment variables
- `NIX_PROFILE`
- `NIX_PROFILE`\
Location of the Nix profile. Defaults to the target of the symlink
`~/.nix-profile`, if it exists, or `/nix/var/nix/profiles/default`
otherwise.

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@ -29,29 +29,29 @@ md5sum`.
# Options
- `--flat`
- `--flat`\
Print the cryptographic hash of the contents of each regular file
*path*. That is, do not compute the hash over the dump of *path*.
The result is identical to that produced by the GNU commands
`md5sum` and `sha1sum`.
- `--base32`
- `--base32`\
Print the hash in a base-32 representation rather than hexadecimal.
This base-32 representation is more compact and can be used in Nix
expressions (such as in calls to `fetchurl`).
- `--truncate`
- `--truncate`\
Truncate hashes longer than 160 bits (such as SHA-256) to 160 bits.
- `--type` *hashAlgo*
- `--type` *hashAlgo*\
Use the specified cryptographic hash algorithm, which can be one of
`md5`, `sha1`, `sha256`, and `sha512`.
- `--to-base16`
- `--to-base16`\
Don’t hash anything, but convert the base-32 hash representation
*hash* to hexadecimal.
- `--to-base32`
- `--to-base32`\
Don’t hash anything, but convert the hexadecimal hash representation
*hash* to base-32.

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@ -29,26 +29,26 @@ standard input.
# Options
- `--add-root` *path*
- `--add-root` *path*\
See the [corresponding option](nix-store.md) in `nix-store`.
- `--parse`
- `--parse`\
Just parse the input files, and print their abstract syntax trees on
standard output in ATerm format.
- `--eval`
- `--eval`\
Just parse and evaluate the input files, and print the resulting
values on standard output. No instantiation of store derivations
takes place.
- `--find-file`
- `--find-file`\
Look up the given files in Nix’s search path (as specified by the
`NIX_PATH` environment variable). If found, print the corresponding
absolute paths on standard output. For instance, if `NIX_PATH` is
`nixpkgs=/home/alice/nixpkgs`, then `nix-instantiate --find-file
nixpkgs/default.nix` will print `/home/alice/nixpkgs/default.nix`.
- `--strict`
- `--strict`\
When used with `--eval`, recursively evaluate list elements and
attributes. Normally, such sub-expressions are left unevaluated
(since the Nix expression language is lazy).
@ -58,17 +58,17 @@ standard input.
> This option can cause non-termination, because lazy data
> structures can be infinitely large.
- `--json`
- `--json`\
When used with `--eval`, print the resulting value as an JSON
representation of the abstract syntax tree rather than as an ATerm.
- `--xml`
- `--xml`\
When used with `--eval`, print the resulting value as an XML
representation of the abstract syntax tree rather than as an ATerm.
The schema is the same as that used by the [`toXML`
built-in](../expressions/builtins.md).
- `--read-write-mode`
- `--read-write-mode`\
When used with `--eval`, perform evaluation in read/write mode so
nix language features that require it will still work (at the cost
of needing to do instantiation of every evaluated derivation). If

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@ -37,22 +37,22 @@ Nix store is also printed.
# Options
- `--type` *hashAlgo*
- `--type` *hashAlgo*\
Use the specified cryptographic hash algorithm, which can be one of
`md5`, `sha1`, `sha256`, and `sha512`.
- `--print-path`
- `--print-path`\
Print the store path of the downloaded file on standard output.
- `--unpack`
- `--unpack`\
Unpack the archive (which must be a tarball or zip file) and add the
result to the Nix store. The resulting hash can be used with
functions such as Nixpkgs’s `fetchzip` or `fetchFromGitHub`.
- `--executable`
- `--executable`\
Set the executable bit on the downloaded file.
- `--name` *name*
- `--name` *name*\
Override the name of the file in the Nix store. By default, this is
`hash-basename`, where *basename* is the last component of *url*.
Overriding the name is necessary when *basename* contains characters

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@ -54,7 +54,7 @@ All options not listed here are passed to `nix-store
--realise`, except for `--arg` and `--attr` / `-A` which are passed to
`nix-instantiate`.
- `--command` *cmd*
- `--command` *cmd*\
In the environment of the derivation, run the shell command *cmd*.
This command is executed in an interactive shell. (Use `--run` to
use a non-interactive shell instead.) However, a call to `exit` is
@ -64,36 +64,34 @@ All options not listed here are passed to `nix-store
drop you into the interactive shell. This can be useful for doing
any additional initialisation.
- `--run` *cmd*
- `--run` *cmd*\
Like `--command`, but executes the command in a non-interactive
shell. This means (among other things) that if you hit Ctrl-C while
the command is running, the shell exits.
- `--exclude` *regexp*
- `--exclude` *regexp*\
Do not build any dependencies whose store path matches the regular
expression *regexp*. This option may be specified multiple times.
- `--pure`
- `--pure`\
If this flag is specified, the environment is almost entirely
cleared before the interactive shell is started, so you get an
environment that more closely corresponds to the “real” Nix build. A
few variables, in particular `HOME`, `USER` and `DISPLAY`, are
retained. Note that (depending on your Bash
installation) `/etc/bashrc` is still sourced, so any variables set
there will affect the interactive shell.
retained.
- `--packages` / `-p` *packages*…
- `--packages` / `-p` *packages*…\
Set up an environment in which the specified packages are present.
The command line arguments are interpreted as attribute names inside
the Nix Packages collection. Thus, `nix-shell -p libjpeg openjdk`
will start a shell in which the packages denoted by the attribute
names `libjpeg` and `openjdk` are present.
- `-i` *interpreter*
- `-i` *interpreter*\
The chained script interpreter to be invoked by `nix-shell`. Only
applicable in `#!`-scripts (described below).
- `--keep` *name*
- `--keep` *name*\
When a `--pure` shell is started, keep the listed environment
variables.
@ -101,7 +99,7 @@ The following common options are supported:
# Environment variables
- `NIX_BUILD_SHELL`
- `NIX_BUILD_SHELL`\
Shell used to start the interactive environment. Defaults to the
`bash` found in `PATH`.

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@ -22,7 +22,7 @@ This section lists the options that are common to all operations. These
options are allowed for every subcommand, though they may not always
have an effect.
- `--add-root` *path*
- `--add-root` *path*\
Causes the result of a realisation (`--realise` and
`--force-realise`) to be registered as a root of the garbage
collector. *path* will be created as a symlink to the resulting
@ -79,22 +79,22 @@ paths. Realisation is a somewhat overloaded term:
system). If the path is already valid, we are done immediately.
Otherwise, the path and any missing paths in its closure may be
produced through substitutes. If there are no (successful)
subsitutes, realisation fails.
substitutes, realisation fails.
The output path of each derivation is printed on standard output. (For
non-derivations argument, the argument itself is printed.)
The following flags are available:
- `--dry-run`
- `--dry-run`\
Print on standard error a description of what packages would be
built or downloaded, without actually performing the operation.
- `--ignore-unknown`
- `--ignore-unknown`\
If a non-derivation path does not have a substitute, then silently
ignore it.
- `--check`
- `--check`\
This option allows you to check whether a derivation is
deterministic. It rebuilds the specified derivation and checks
whether the result is bitwise-identical with the existing outputs,
@ -110,20 +110,20 @@ The following flags are available:
Special exit codes:
- `100`
- `100`\
Generic build failure, the builder process returned with a non-zero
exit code.
- `101`
- `101`\
Build timeout, the build was aborted because it did not complete
within the specified `timeout`.
- `102`
- `102`\
Hash mismatch, the build output was rejected because it does not
match the [`outputHash` attribute of the
derivation](../expressions/advanced-attributes.md).
- `104`
- `104`\
Not deterministic, the build succeeded in check mode but the
resulting output is not binary reproducable.
@ -170,7 +170,7 @@ access to a restricted ssh user.
The following flags are available:
- `--write`
- `--write`\
Allow the connected client to request the realization of
derivations. In effect, this can be used to make the host act as a
remote builder.
@ -200,18 +200,18 @@ reachable via file system references from a set of “roots”, are deleted.
The following suboperations may be specified:
- `--print-roots`
- `--print-roots`\
This operation prints on standard output the set of roots used by
the garbage collector.
- `--print-live`
- `--print-live`\
This operation prints on standard output the set of “live” store
paths, which are all the store paths reachable from the roots. Live
paths should never be deleted, since that would break consistency —
it would become possible that applications are installed that
reference things that are no longer present in the store.
- `--print-dead`
- `--print-dead`\
This operation prints out on standard output the set of “dead” store
paths, which is just the opposite of the set of live paths: any path
in the store that is not live (with respect to the roots) is dead.
@ -219,7 +219,7 @@ The following suboperations may be specified:
By default, all unreachable paths are deleted. The following options
control what gets deleted and in what order:
- `--max-freed` *bytes*
- `--max-freed` *bytes*\
Keep deleting paths until at least *bytes* bytes have been deleted,
then stop. The argument *bytes* can be followed by the
multiplicative suffix `K`, `M`, `G` or `T`, denoting KiB, MiB, GiB
@ -300,22 +300,22 @@ symlink.
## Common query options
- `--use-output`; `-u`
- `--use-output`; `-u`\
For each argument to the query that is a store derivation, apply the
query to the output path of the derivation instead.
- `--force-realise`; `-f`
- `--force-realise`; `-f`\
Realise each argument to the query first (see [`nix-store
--realise`](#operation---realise)).
## Queries
- `--outputs`
- `--outputs`\
Prints out the [output paths](../glossary.md) of the store
derivations *paths*. These are the paths that will be produced when
the derivation is built.
- `--requisites`; `-R`
- `--requisites`; `-R`\
Prints out the [closure](../glossary.md) of the store path *paths*.
This query has one option:
@ -332,31 +332,31 @@ symlink.
dependencies) is obtained by distributing the closure of a store
derivation and specifying the option `--include-outputs`.
- `--references`
- `--references`\
Prints the set of [references](../glossary.md) of the store paths
*paths*, that is, their immediate dependencies. (For *all*
dependencies, use `--requisites`.)
- `--referrers`
- `--referrers`\
Prints the set of *referrers* of the store paths *paths*, that is,
the store paths currently existing in the Nix store that refer to
one of *paths*. Note that contrary to the references, the set of
referrers is not constant; it can change as store paths are added or
removed.
- `--referrers-closure`
- `--referrers-closure`\
Prints the closure of the set of store paths *paths* under the
referrers relation; that is, all store paths that directly or
indirectly refer to one of *paths*. These are all the path currently
in the Nix store that are dependent on *paths*.
- `--deriver`; `-d`
- `--deriver`; `-d`\
Prints the [deriver](../glossary.md) of the store paths *paths*. If
the path has no deriver (e.g., if it is a source file), or if the
deriver is not known (e.g., in the case of a binary-only
deployment), the string `unknown-deriver` is printed.
- `--graph`
- `--graph`\
Prints the references graph of the store paths *paths* in the format
of the `dot` tool of AT\&T's [Graphviz
package](http://www.graphviz.org/). This can be used to visualise
@ -364,39 +364,39 @@ symlink.
this to a store derivation. To obtain a runtime dependency graph,
apply it to an output path.
- `--tree`
- `--tree`\
Prints the references graph of the store paths *paths* as a nested
ASCII tree. References are ordered by descending closure size; this
tends to flatten the tree, making it more readable. The query only
recurses into a store path when it is first encountered; this
prevents a blowup of the tree representation of the graph.
- `--graphml`
- `--graphml`\
Prints the references graph of the store paths *paths* in the
[GraphML](http://graphml.graphdrawing.org/) file format. This can be
used to visualise dependency graphs. To obtain a build-time
dependency graph, apply this to a store derivation. To obtain a
runtime dependency graph, apply it to an output path.
- `--binding` *name*; `-b` *name*
- `--binding` *name*; `-b` *name*\
Prints the value of the attribute *name* (i.e., environment
variable) of the store derivations *paths*. It is an error for a
derivation to not have the specified attribute.
- `--hash`
- `--hash`\
Prints the SHA-256 hash of the contents of the store paths *paths*
(that is, the hash of the output of `nix-store --dump` on the given
paths). Since the hash is stored in the Nix database, this is a fast
operation.
- `--size`
- `--size`\
Prints the size in bytes of the contents of the store paths *paths*
— to be precise, the size of the output of `nix-store --dump` on
the given paths. Note that the actual disk space required by the
store paths may be higher, especially on filesystems with large
cluster sizes.
- `--roots`
- `--roots`\
Prints the garbage collector roots that point, directly or
indirectly, at the store paths *paths*.
@ -513,7 +513,7 @@ public url or broke since the download expression was written.
This operation has the following options:
- `--recursive`
- `--recursive`\
Use recursive instead of flat hashing mode, used when adding
directories to the store.
@ -540,14 +540,14 @@ being modified by non-Nix tools, or of bugs in Nix itself.
This operation has the following options:
- `--check-contents`
- `--check-contents`\
Checks that the contents of every valid store path has not been
altered by computing a SHA-256 hash of the contents and comparing it
with the hash stored in the Nix database at build time. Paths that
have been modified are printed out. For large stores,
`--check-contents` is obviously quite slow.
- `--repair`
- `--repair`\
If any valid path is missing from the store, or (if
`--check-contents` is given) the contents of a valid path has been
modified, then try to repair the path by redownloading it. See

96
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@ -2,56 +2,56 @@
Most Nix commands accept the following command-line options:
- `--help`
- `--help`\
Prints out a summary of the command syntax and exits.
- `--version`
- `--version`\
Prints out the Nix version number on standard output and exits.
- `--verbose` / `-v`
- `--verbose` / `-v`\
Increases the level of verbosity of diagnostic messages printed on
standard error. For each Nix operation, the information printed on
standard output is well-defined; any diagnostic information is
printed on standard error, never on standard output.
This option may be specified repeatedly. Currently, the following
verbosity levels exist:
- 0
- 0\
“Errors only”: only print messages explaining why the Nix
invocation failed.
- 1
- 1\
“Informational”: print *useful* messages about what Nix is
doing. This is the default.
- 2
- 2\
“Talkative”: print more informational messages.
- 3
- 3\
“Chatty”: print even more informational messages.
- 4
- 4\
“Debug”: print debug information.
- 5
- 5\
“Vomit”: print vast amounts of debug information.
- `--quiet`
- `--quiet`\
Decreases the level of verbosity of diagnostic messages printed on
standard error. This is the inverse option to `-v` / `--verbose`.
This option may be specified repeatedly. See the previous verbosity
levels list.
- `--log-format` *format*
- `--log-format` *format*\
This option can be used to change the output of the log format, with
*format* being one of:
- raw
- raw\
This is the raw format, as outputted by nix-build.
- internal-json
- internal-json\
Outputs the logs in a structured manner.
> **Warning**
@ -60,30 +60,30 @@ Most Nix commands accept the following command-line options:
> the error-messages (namely of the `msg`-field) can change
> between releases.
- bar
- bar\
Only display a progress bar during the builds.
- bar-with-logs
- bar-with-logs\
Display the raw logs, with the progress bar at the bottom.
- `--no-build-output` / `-Q`
- `--no-build-output` / `-Q`\
By default, output written by builders to standard output and
standard error is echoed to the Nix command's standard error. This
option suppresses this behaviour. Note that the builder's standard
output and error are always written to a log file in
`prefix/nix/var/log/nix`.
- `--max-jobs` / `-j` *number*
- `--max-jobs` / `-j` *number*\
Sets the maximum number of build jobs that Nix will perform in
parallel to the specified number. Specify `auto` to use the number
of CPUs in the system. The default is specified by the `max-jobs`
configuration setting, which itself defaults to `1`. A higher
value is useful on SMP systems or to exploit I/O latency.
Setting it to `0` disallows building on the local machine, which is
useful when you want builds to happen only on remote builders.
- `--cores`
- `--cores`\
Sets the value of the `NIX_BUILD_CORES` environment variable in
the invocation of builders. Builders can use this variable at
their discretion to control the maximum amount of parallelism. For
@ -94,18 +94,18 @@ Most Nix commands accept the following command-line options:
means that the builder should use all available CPU cores in the
system.
- `--max-silent-time`
- `--max-silent-time`\
Sets the maximum number of seconds that a builder can go without
producing any data on standard output or standard error. The
default is specified by the `max-silent-time` configuration
setting. `0` means no time-out.
- `--timeout`
- `--timeout`\
Sets the maximum number of seconds that a builder can run. The
default is specified by the `timeout` configuration setting. `0`
means no timeout.
- `--keep-going` / `-k`
- `--keep-going` / `-k`\
Keep going in case of failed builds, to the greatest extent
possible. That is, if building an input of some derivation fails,
Nix will still build the other inputs, but not the derivation
@ -113,17 +113,17 @@ Most Nix commands accept the following command-line options:
for builds of substitutes), possibly killing builds in progress (in
case of parallel or distributed builds).
- `--keep-failed` / `-K`
- `--keep-failed` / `-K`\
Specifies that in case of a build failure, the temporary directory
(usually in `/tmp`) in which the build takes place should not be
deleted. The path of the build directory is printed as an
informational message.
- `--fallback`
- `--fallback`\
Whenever Nix attempts to build a derivation for which substitutes
are known for each output path, but realising the output paths
through the substitutes fails, fall back on building the derivation.
The most common scenario in which this is useful is when we have
registered substitutes in order to perform binary distribution from,
say, a network repository. If the repository is down, the
@ -134,12 +134,12 @@ Most Nix commands accept the following command-line options:
failure in obtaining the substitutes to lead to a full build from
source (with the related consumption of resources).
- `--readonly-mode`
- `--readonly-mode`\
When this option is used, no attempt is made to open the Nix
database. Most Nix operations do need database access, so those
operations will fail.
- `--arg` *name* *value*
- `--arg` *name* *value*\
This option is accepted by `nix-env`, `nix-instantiate`,
`nix-shell` and `nix-build`. When evaluating Nix expressions, the
expression evaluator will automatically try to call functions that
@ -151,7 +151,7 @@ Most Nix commands accept the following command-line options:
override a default value). That is, if the evaluator encounters a
function with an argument named *name*, it will call it with value
*value*.
For instance, the top-level `default.nix` in Nixpkgs is actually a
function:
@ -161,7 +161,7 @@ Most Nix commands accept the following command-line options:
...
}: ...
```
So if you call this Nix expression (e.g., when you do `nix-env -i
pkgname`), the function will be called automatically using the
value [`builtins.currentSystem`](../expressions/builtins.md) for
@ -170,13 +170,13 @@ Most Nix commands accept the following command-line options:
since the argument is a Nix string literal, you have to escape the
quotes.)
- `--argstr` *name* *value*
- `--argstr` *name* *value*\
This option is like `--arg`, only the value is not a Nix
expression but a string. So instead of `--arg system
\"i686-linux\"` (the outer quotes are to keep the shell happy) you
can say `--argstr system i686-linux`.
- `--attr` / `-A` *attrPath*
- `--attr` / `-A` *attrPath*\
Select an attribute from the top-level Nix expression being
evaluated. (`nix-env`, `nix-instantiate`, `nix-build` and
`nix-shell` only.) The *attribute path* *attrPath* is a sequence
@ -185,34 +185,34 @@ Most Nix commands accept the following command-line options:
would cause the expression `e.xorg.xorgserver` to be used. See
[`nix-env --install`](nix-env.md#operation---install) for some
concrete examples.
In addition to attribute names, you can also specify array indices.
For instance, the attribute path `foo.3.bar` selects the `bar`
attribute of the fourth element of the array in the `foo` attribute
of the top-level expression.
- `--expr` / `-E`
- `--expr` / `-E`\
Interpret the command line arguments as a list of Nix expressions to
be parsed and evaluated, rather than as a list of file names of Nix
expressions. (`nix-instantiate`, `nix-build` and `nix-shell` only.)
For `nix-shell`, this option is commonly used to give you a shell in
which you can build the packages returned by the expression. If you
want to get a shell which contain the *built* packages ready for
use, give your expression to the `nix-shell -p` convenience flag
instead.
- `-I` *path*
- `-I` *path*\
Add a path to the Nix expression search path. This option may be
given multiple times. See the `NIX_PATH` environment variable for
information on the semantics of the Nix search path. Paths added
through `-I` take precedence over `NIX_PATH`.
- `--option` *name* *value*
- `--option` *name* *value*\
Set the Nix configuration option *name* to *value*. This overrides
settings in the Nix configuration file (see nix.conf5).
- `--repair`
- `--repair`\
Fix corrupted or missing store paths by redownloading or rebuilding
them. Note that this is slow because it requires computing a
cryptographic hash of the contents of every path in the closure of

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@ -2,14 +2,14 @@
Derivations can declare some infrequently used optional attributes.
- `allowedReferences`
- `allowedReferences`\
The optional attribute `allowedReferences` specifies a list of legal
references (dependencies) of the output of the builder. For example,
```nix
allowedReferences = [];
```
enforces that the output of a derivation cannot have any runtime
dependencies on its inputs. To allow an output to have a runtime
dependency on itself, use `"out"` as a list item. This is used in
@ -17,45 +17,45 @@ Derivations can declare some infrequently used optional attributes.
booting Linux don’t have accidental dependencies on other paths in
the Nix store.
- `allowedRequisites`
- `allowedRequisites`\
This attribute is similar to `allowedReferences`, but it specifies
the legal requisites of the whole closure, so all the dependencies
recursively. For example,
```nix
allowedRequisites = [ foobar ];
```
enforces that the output of a derivation cannot have any other
runtime dependency than `foobar`, and in addition it enforces that
`foobar` itself doesn't introduce any other dependency itself.
- `disallowedReferences`
- `disallowedReferences`\
The optional attribute `disallowedReferences` specifies a list of
illegal references (dependencies) of the output of the builder. For
example,
```nix
disallowedReferences = [ foo ];
```
enforces that the output of a derivation cannot have a direct
runtime dependencies on the derivation `foo`.
- `disallowedRequisites`
- `disallowedRequisites`\
This attribute is similar to `disallowedReferences`, but it
specifies illegal requisites for the whole closure, so all the
dependencies recursively. For example,
```nix
disallowedRequisites = [ foobar ];
```
enforces that the output of a derivation cannot have any runtime
dependency on `foobar` or any other derivation depending recursively
on `foobar`.
- `exportReferencesGraph`
- `exportReferencesGraph`\
This attribute allows builders access to the references graph of
their inputs. The attribute is a list of inputs in the Nix store
whose references graph the builder needs to know. The value of
@ -65,17 +65,17 @@ Derivations can declare some infrequently used optional attributes.
files have the format used by `nix-store --register-validity`
(with the deriver fields left empty). For example, when the
following derivation is built:
```nix
derivation {
...
exportReferencesGraph = [ "libfoo-graph" libfoo ];
};
```
the references graph of `libfoo` is placed in the file
`libfoo-graph` in the temporary build directory.
`exportReferencesGraph` is useful for builders that want to do
something with the closure of a store path. Examples include the
builders in NixOS that generate the initial ramdisk for booting
@ -84,66 +84,66 @@ Derivations can declare some infrequently used optional attributes.
with a Nix store containing the closure of a bootable NixOS
configuration).
- `impureEnvVars`
- `impureEnvVars`\
This attribute allows you to specify a list of environment variables
that should be passed from the environment of the calling user to
the builder. Usually, the environment is cleared completely when the
builder is executed, but with this attribute you can allow specific
environment variables to be passed unmodified. For example,
`fetchurl` in Nixpkgs has the line
```nix
impureEnvVars = [ "http_proxy" "https_proxy" ... ];
```
to make it use the proxy server configuration specified by the user
in the environment variables `http_proxy` and friends.
This attribute is only allowed in *fixed-output derivations* (see
below), where impurities such as these are okay since (the hash
of) the output is known in advance. It is ignored for all other
derivations.
> **Warning**
>
>
> `impureEnvVars` implementation takes environment variables from
> the current builder process. When a daemon is building its
> environmental variables are used. Without the daemon, the
> environmental variables come from the environment of the
> `nix-build`.
- `outputHash`; `outputHashAlgo`; `outputHashMode`
- `outputHash`; `outputHashAlgo`; `outputHashMode`\
These attributes declare that the derivation is a so-called
*fixed-output derivation*, which means that a cryptographic hash of
the output is already known in advance. When the build of a
fixed-output derivation finishes, Nix computes the cryptographic
hash of the output and compares it to the hash declared with these
attributes. If there is a mismatch, the build fails.
The rationale for fixed-output derivations is derivations such as
those produced by the `fetchurl` function. This function downloads a
file from a given URL. To ensure that the downloaded file has not
been modified, the caller must also specify a cryptographic hash of
the file. For example,
```nix
fetchurl {
url = "http://ftp.gnu.org/pub/gnu/hello/hello-2.1.1.tar.gz";
sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
}
```
It sometimes happens that the URL of the file changes, e.g., because
servers are reorganised or no longer available. We then must update
the call to `fetchurl`, e.g.,
```nix
fetchurl {
url = "ftp://ftp.nluug.nl/pub/gnu/hello/hello-2.1.1.tar.gz";
sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
}
```
If a `fetchurl` derivation was treated like a normal derivation, the
output paths of the derivation and *all derivations depending on it*
would change. For instance, if we were to change the URL of the
@ -151,16 +151,16 @@ Derivations can declare some infrequently used optional attributes.
other packages depend) massive rebuilds would be needed. This is
unfortunate for a change which we know cannot have a real effect as
it propagates upwards through the dependency graph.
For fixed-output derivations, on the other hand, the name of the
output path only depends on the `outputHash*` and `name` attributes,
while all other attributes are ignored for the purpose of computing
the output path. (The `name` attribute is included because it is
part of the path.)
As an example, here is the (simplified) Nix expression for
`fetchurl`:
```nix
{ stdenv, curl }: # The curl program is used for downloading.
@ -180,43 +180,51 @@ Derivations can declare some infrequently used optional attributes.
inherit url;
}
```
The `outputHashAlgo` attribute specifies the hash algorithm used to
compute the hash. It can currently be `"sha1"`, `"sha256"` or
`"sha512"`.
The `outputHashMode` attribute determines how the hash is computed.
It must be one of the following two values:
- `"flat"`
- `"flat"`\
The output must be a non-executable regular file. If it isn’t,
the build fails. The hash is simply computed over the contents
of that file (so it’s equal to what Unix commands like
`sha256sum` or `sha1sum` produce).
This is the default.
- `"recursive"`
- `"recursive"`\
The hash is computed over the NAR archive dump of the output
(i.e., the result of [`nix-store
--dump`](../command-ref/nix-store.md#operation---dump)). In
this case, the output can be anything, including a directory
tree.
The `outputHash` attribute, finally, must be a string containing
the hash in either hexadecimal or base-32 notation. (See the
[`nix-hash` command](../command-ref/nix-hash.md) for information
about converting to and from base-32 notation.)
- `__contentAddressed`
If this **experimental** attribute is set to true, then the derivation
outputs will be stored in a content-addressed location rather than the
traditional input-addressed one.
This only has an effect if the `ca-derivation` experimental feature is enabled.
Setting this attribute also requires setting `outputHashMode` and `outputHashAlgo` like for *fixed-output derivations* (see above).
- `passAsFile`
- `passAsFile`\
A list of names of attributes that should be passed via files rather
than environment variables. For example, if you have
```nix
passAsFile = ["big"];
big = "a very long string";
```
then when the builder runs, the environment variable `bigPath`
will contain the absolute path to a temporary file containing `a
very long string`. That is, for any attribute *x* listed in
@ -226,7 +234,7 @@ Derivations can declare some infrequently used optional attributes.
builder, since most operating systems impose a limit on the size
of the environment (typically, a few hundred kilobyte).
- `preferLocalBuild`
- `preferLocalBuild`\
If this attribute is set to `true` and [distributed building is
enabled](../advanced-topics/distributed-builds.md), then, if
possible, the derivaton will be built locally instead of forwarded
@ -234,14 +242,14 @@ Derivations can declare some infrequently used optional attributes.
where the cost of doing a download or remote build would exceed
the cost of building locally.
- `allowSubstitutes`
- `allowSubstitutes`\
If this attribute is set to `false`, then Nix will always build this
derivation; it will not try to substitute its outputs. This is
useful for very trivial derivations (such as `writeText` in Nixpkgs)
that are cheaper to build than to substitute from a binary cache.
> **Note**
>
>
> You need to have a builder configured which satisfies the
> derivation’s `system` attribute, since the derivation cannot be
> substituted. Thus it is usually a good idea to align `system` with

4
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@ -2,7 +2,7 @@
Here are the constants built into the Nix expression evaluator:
- `builtins`
- `builtins`\
The set `builtins` contains all the built-in functions and values.
You can use `builtins` to test for the availability of features in
the Nix installation, e.g.,
@ -14,7 +14,7 @@ Here are the constants built into the Nix expression evaluator:
This allows a Nix expression to fall back gracefully on older Nix
installations that don’t have the desired built-in function.
- `builtins.currentSystem`
- `builtins.currentSystem`\
The built-in value `currentSystem` evaluates to the Nix platform
identifier for the Nix installation on which the expression is being
evaluated, such as `"i686-linux"` or `"x86_64-darwin"`.

2
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@ -9,7 +9,7 @@ scope. Instead, you can access them through the `builtins` built-in
value, which is a set that contains all built-in functions and values.
For instance, `derivation` is also available as `builtins.derivation`.
- `derivation` *attrs*; `builtins.derivation` *attrs*
- `derivation` *attrs*; `builtins.derivation` *attrs*\
`derivation` is described in [its own section](derivations.md).

32
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@ -1,48 +1,48 @@
# Glossary
- derivation
- derivation\
A description of a build action. The result of a derivation is a
store object. Derivations are typically specified in Nix expressions
using the [`derivation` primitive](expressions/derivations.md). These are
translated into low-level *store derivations* (implicitly by
`nix-env` and `nix-build`, or explicitly by `nix-instantiate`).
- store
- store\
The location in the file system where store objects live. Typically
`/nix/store`.
- store path
- store path\
The location in the file system of a store object, i.e., an
immediate child of the Nix store directory.
- store object
- store object\
A file that is an immediate child of the Nix store directory. These
can be regular files, but also entire directory trees. Store objects
can be sources (objects copied from outside of the store),
derivation outputs (objects produced by running a build action), or
derivations (files describing a build action).
- substitute
- substitute\
A substitute is a command invocation stored in the Nix database that
describes how to build a store object, bypassing the normal build
mechanism (i.e., derivations). Typically, the substitute builds the
store object by downloading a pre-built version of the store object
from some server.
- purity
- purity\
The assumption that equal Nix derivations when run always produce
the same output. This cannot be guaranteed in general (e.g., a
builder can rely on external inputs such as the network or the
system time) but the Nix model assumes it.
- Nix expression
- Nix expression\
A high-level description of software packages and compositions
thereof. Deploying software using Nix entails writing Nix
expressions for your packages. Nix expressions are translated to
derivations that are stored in the Nix store. These derivations can
then be built.
- reference
- reference\
A store path `P` is said to have a reference to a store path `Q` if
the store object at `P` contains the path `Q` somewhere. The
*references* of a store path are the set of store paths to which it
@ -52,11 +52,11 @@
output paths), whereas an output path only references other output
paths.
- reachable
- reachable\
A store path `Q` is reachable from another store path `P` if `Q`
is in the *closure* of the *references* relation.
- closure
- closure\
The closure of a store path is the set of store paths that are
directly or indirectly “reachable” from that store path; that is,
it’s the closure of the path under the *references* relation. For
@ -71,29 +71,29 @@
to path `Q`, then `Q` is in the closure of `P`. Further, if `Q`
references `R` then `R` is also in the closure of `P`.
- output path
- output path\
A store path produced by a derivation.
- deriver
- deriver\
The deriver of an *output path* is the store
derivation that built it.
- validity
- validity\
A store path is considered *valid* if it exists in the file system,
is listed in the Nix database as being valid, and if all paths in
its closure are also valid.
- user environment
- user environment\
An automatically generated store object that consists of a set of
symlinks to “active” applications, i.e., other store paths. These
are generated automatically by
[`nix-env`](command-ref/nix-env.md). See *profiles*.
- profile
- profile\
A symlink to the current *user environment* of a user, e.g.,
`/nix/var/nix/profiles/default`.
- NAR
- NAR\
A *N*ix *AR*chive. This is a serialisation of a path in the Nix
store. It can contain regular files, directories and symbolic
links. NARs are generated and unpacked using `nix-store --dump`

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@ -1,18 +1,26 @@
# Installing a Binary Distribution
If you are using Linux or macOS versions up to 10.14 (Mojave), the
easiest way to install Nix is to run the following command:
The easiest way to install Nix is to run the following command:
```console
$ sh <(curl -L https://nixos.org/nix/install)
```
If you're using macOS 10.15 (Catalina) or newer, consult [the macOS
installation instructions](#macos-installation) before installing.
This will run the installer interactively (causing it to explain what
it is doing more explicitly), and perform the default "type" of install
for your platform:
- single-user on Linux
- multi-user on macOS
As of Nix 2.1.0, the Nix installer will always default to creating a
single-user installation, however opting in to the multi-user
installation is highly recommended.
> **Notes on read-only filesystem root in macOS 10.15 Catalina +**
>
> - It took some time to support this cleanly. You may see posts,
> examples, and tutorials using obsolete workarounds.
> - Supporting it cleanly made macOS installs too complex to qualify
> as single-user, so this type is no longer supported on macOS.
We recommend the multi-user install if it supports your platform and
you can authenticate with `sudo`.
# Single User Installation
@ -50,9 +58,9 @@ $ rm -rf /nix
The multi-user Nix installation creates system users, and a system
service for the Nix daemon.
- Linux running systemd, with SELinux disabled
- macOS
**Supported Systems**
- Linux running systemd, with SELinux disabled
- macOS
You can instruct the installer to perform a multi-user installation on
your system:
@ -96,165 +104,28 @@ sudo rm /Library/LaunchDaemons/org.nixos.nix-daemon.plist
There may also be references to Nix in `/etc/profile`, `/etc/bashrc`,
and `/etc/zshrc` which you may remove.
# macOS Installation
# macOS Installation <a name="sect-macos-installation-change-store-prefix"></a><a name="sect-macos-installation-encrypted-volume"></a><a name="sect-macos-installation-symlink"></a><a name="sect-macos-installation-recommended-notes"></a>
<!-- Note: anchors above to catch permalinks to old explanations -->
Starting with macOS 10.15 (Catalina), the root filesystem is read-only.
This means `/nix` can no longer live on your system volume, and that
you'll need a workaround to install Nix.
We believe we have ironed out how to cleanly support the read-only root
on modern macOS. New installs will do this automatically, and you can
also re-run a new installer to convert your existing setup.
The recommended approach, which creates an unencrypted APFS volume for
your Nix store and a "synthetic" empty directory to mount it over at
`/nix`, is least likely to impair Nix or your system.
This section previously detailed the situation, options, and trade-offs,
but it now only outlines what the installer does. You don't need to know
this to run the installer, but it may help if you run into trouble:
> **Note**
>
> With all separate-volume approaches, it's possible something on your
> system (particularly daemons/services and restored apps) may need
> access to your Nix store before the volume is mounted. Adding
> additional encryption makes this more likely.
If you're using a recent Mac with a [T2
chip](https://www.apple.com/euro/mac/shared/docs/Apple_T2_Security_Chip_Overview.pdf),
your drive will still be encrypted at rest (in which case "unencrypted"
is a bit of a misnomer). To use this approach, just install Nix with:
```console
$ sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume
```
If you don't like the sound of this, you'll want to weigh the other
approaches and tradeoffs detailed in this section.
> **Note**
>
> All of the known workarounds have drawbacks, but we hope better
> solutions will be available in the future. Some that we have our eye
> on are:
>
> 1. A true firmlink would enable the Nix store to live on the primary
> data volume without the build problems caused by the symlink
> approach. End users cannot currently create true firmlinks.
>
> 2. If the Nix store volume shared FileVault encryption with the
> primary data volume (probably by using the same volume group and
> role), FileVault encryption could be easily supported by the
> installer without requiring manual setup by each user.
## Change the Nix store path prefix
Changing the default prefix for the Nix store is a simple approach which
enables you to leave it on your root volume, where it can take full
advantage of FileVault encryption if enabled. Unfortunately, this
approach also opts your device out of some benefits that are enabled by
using the same prefix across systems:
- Your system won't be able to take advantage of the binary cache
(unless someone is able to stand up and support duplicate caching
infrastructure), which means you'll spend more time waiting for
builds.
- It's harder to build and deploy packages to Linux systems.
It would also possible (and often requested) to just apply this change
ecosystem-wide, but it's an intrusive process that has side effects we
want to avoid for now.
## Use a separate encrypted volume
If you like, you can also add encryption to the recommended approach
taken by the installer. You can do this by pre-creating an encrypted
volume before you run the installer--or you can run the installer and
encrypt the volume it creates later.
In either case, adding encryption to a second volume isn't quite as
simple as enabling FileVault for your boot volume. Before you dive in,
there are a few things to weigh:
1. The additional volume won't be encrypted with your existing
FileVault key, so you'll need another mechanism to decrypt the
volume.
2. You can store the password in Keychain to automatically decrypt the
volume on boot--but it'll have to wait on Keychain and may not mount
before your GUI apps restore. If any of your launchd agents or apps
depend on Nix-installed software (for example, if you use a
Nix-installed login shell), the restore may fail or break.
On a case-by-case basis, you may be able to work around this problem
by using `wait4path` to block execution until your executable is
available.
It's also possible to decrypt and mount the volume earlier with a
login hook--but this mechanism appears to be deprecated and its
future is unclear.
3. You can hard-code the password in the clear, so that your store
volume can be decrypted before Keychain is available.
If you are comfortable navigating these tradeoffs, you can encrypt the
volume with something along the lines of:
```console
$ diskutil apfs enableFileVault /nix -user disk
```
## Symlink the Nix store to a custom location
Another simple approach is using `/etc/synthetic.conf` to symlink the
Nix store to the data volume. This option also enables your store to
share any configured FileVault encryption. Unfortunately, builds that
resolve the symlink may leak the canonical path or even fail.
Because of these downsides, we can't recommend this approach.
## Notes on the recommended approach
This section goes into a little more detail on the recommended approach.
You don't need to understand it to run the installer, but it can serve
as a helpful reference if you run into trouble.
1. In order to compose user-writable locations into the new read-only
system root, Apple introduced a new concept called `firmlinks`,
which it describes as a "bi-directional wormhole" between two
filesystems. You can see the current firmlinks in
`/usr/share/firmlinks`. Unfortunately, firmlinks aren't (currently?)
user-configurable.
For special cases like NFS mount points or package manager roots,
[synthetic.conf(5)](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man5/synthetic.conf.5.html)
supports limited user-controlled file-creation (of symlinks, and
synthetic empty directories) at `/`. To create a synthetic empty
directory for mounting at `/nix`, add the following line to
`/etc/synthetic.conf` (create it if necessary):
nix
2. This configuration is applied at boot time, but you can use
`apfs.util` to trigger creation (not deletion) of new entries
without a reboot:
```console
$ /System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util -B
```
3. Create the new APFS volume with diskutil:
```console
$ sudo diskutil apfs addVolume diskX APFS 'Nix Store' -mountpoint /nix
```
4. Using `vifs`, add the new mount to `/etc/fstab`. If it doesn't
already have other entries, it should look something like:
#
# Warning - this file should only be modified with vifs(8)
#
# Failure to do so is unsupported and may be destructive.
#
LABEL=Nix\040Store /nix apfs rw,nobrowse
The nobrowse setting will keep Spotlight from indexing this volume,
and keep it from showing up on your desktop.
- create a new APFS volume for your Nix store
- update `/etc/synthetic.conf` to direct macOS to create a "synthetic"
empty root directory to mount your volume
- specify mount options for the volume in `/etc/fstab`
- if you have FileVault enabled
- generate an encryption password
- put it in your system Keychain
- use it to encrypt the volume
- create a system LaunchDaemon to mount this volume early enough in the
boot process to avoid problems loading or restoring any programs that
need access to your Nix store
# Installing a pinned Nix version from a URL

8
doc/manual/src/package-management/s3-substituter.md
View file

@ -7,17 +7,17 @@ cache mechanism that Nix usually uses to fetch prebuilt binaries from
The following options can be specified as URL parameters to the S3 URL:
- `profile`
- `profile`\
The name of the AWS configuration profile to use. By default Nix
will use the `default` profile.
- `region`
- `region`\
The region of the S3 bucket. `us–east-1` by default.
If your bucket is not in `us–east-1`, you should always explicitly
specify the region parameter.
- `endpoint`
- `endpoint`\
The URL to your S3-compatible service, for when not using Amazon S3.
Do not specify this value if you're using Amazon S3.
@ -26,7 +26,7 @@ The following options can be specified as URL parameters to the S3 URL:
> This endpoint must support HTTPS and will use path-based
> addressing instead of virtual host based addressing.
- `scheme`
- `scheme`\
The scheme used for S3 requests, `https` (default) or `http`. This
option allows you to disable HTTPS for binary caches which don't
support it.

26
flake.lock
View file

@ -1,22 +1,40 @@
{
"nodes": {
"lowdown-src": {
"flake": false,
"locked": {
"lastModified": 1617481909,
"narHash": "sha256-SqnfOFuLuVRRNeVJr1yeEPJue/qWoCp5N6o5Kr///p4=",
"owner": "kristapsdz",
"repo": "lowdown",
"rev": "148f9b2f586c41b7e36e73009db43ea68c7a1a4d",
"type": "github"
},
"original": {
"owner": "kristapsdz",
"ref": "VERSION_0_8_4",
"repo": "lowdown",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1614309161,
"narHash": "sha256-93kRxDPyEW9QIpxU71kCaV1r+hgOgP6/aVgC7vvO8IU=",
"lastModified": 1622593737,
"narHash": "sha256-9loxFJg85AbzJrSkU4pE/divZ1+zOxDy2FSjlrufCB8=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "0e499fde7af3c28d63e9b13636716b86c3162b93",
"rev": "bb8a5e54845012ed1375ffd5f317d2fdf434b20e",
"type": "github"
},
"original": {
"id": "nixpkgs",
"ref": "nixos-20.09-small",
"ref": "nixos-21.05-small",
"type": "indirect"
}
},
"root": {
"inputs": {
"lowdown-src": "lowdown-src",
"nixpkgs": "nixpkgs"
}
}

77
flake.nix
View file

@ -1,10 +1,10 @@
{
description = "The purely functional package manager";
inputs.nixpkgs.url = "nixpkgs/nixos-20.09-small";
#inputs.lowdown-src = { url = "github:kristapsdz/lowdown"; flake = false; };
inputs.nixpkgs.url = "nixpkgs/nixos-21.05-small";
inputs.lowdown-src = { url = "github:kristapsdz/lowdown/VERSION_0_8_4"; flake = false; };
outputs = { self, nixpkgs }:
outputs = { self, nixpkgs, lowdown-src }:
let
@ -18,7 +18,7 @@
linux64BitSystems = [ "x86_64-linux" "aarch64-linux" ];
linuxSystems = linux64BitSystems ++ [ "i686-linux" ];
systems = linuxSystems ++ [ "x86_64-darwin" ];
systems = linuxSystems ++ [ "x86_64-darwin" "aarch64-darwin" ];
crossSystems = [ "armv6l-linux" "armv7l-linux" ];
@ -80,11 +80,12 @@
buildPackages.git
buildPackages.mercurial
buildPackages.jq
] ++ lib.optional stdenv.hostPlatform.isLinux buildPackages.utillinuxMinimal;
]
++ lib.optionals stdenv.hostPlatform.isLinux [(buildPackages.util-linuxMinimal or buildPackages.utillinuxMinimal)];
buildDeps =
[ curl
bzip2 xz brotli zlib editline
bzip2 xz brotli editline
openssl sqlite
libarchive
boost
@ -92,7 +93,7 @@
lowdown
gmock
]
++ lib.optional stdenv.isLinux libseccomp
++ lib.optionals stdenv.isLinux [libseccomp]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
++ lib.optional stdenv.hostPlatform.isx86_64 libcpuid;
@ -146,12 +147,46 @@
echo "file installer $out/install" >> $out/nix-support/hydra-build-products
'';
testNixVersions = pkgs: client: daemon: with commonDeps pkgs; pkgs.stdenv.mkDerivation {
NIX_DAEMON_PACKAGE = daemon;
NIX_CLIENT_PACKAGE = client;
# Must keep this name short as OSX has a rather strict limit on the
# socket path length, and this name appears in the path of the
# nix-daemon socket used in the tests
name = "nix-tests";
inherit version;
src = self;
VERSION_SUFFIX = versionSuffix;
nativeBuildInputs = nativeBuildDeps;
buildInputs = buildDeps ++ awsDeps;
propagatedBuildInputs = propagatedDeps;
enableParallelBuilding = true;
dontBuild = true;
doInstallCheck = true;
installPhase = ''
mkdir -p $out
'';
installCheckPhase = "make installcheck";
};
in {
# A Nixpkgs overlay that overrides the 'nix' and
# 'nix.perl-bindings' packages.
overlay = final: prev: {
# An older version of Nix to test against when using the daemon.
# Currently using `nixUnstable` as the stable one doesn't respect
# `NIX_DAEMON_SOCKET_PATH` which is needed for the tests.
nixStable = prev.nix;
nix = with final; with commonDeps pkgs; stdenv.mkDerivation {
name = "nix-${version}";
inherit version;
@ -201,6 +236,8 @@
separateDebugInfo = true;
strictDeps = true;
passthru.perl-bindings = with final; stdenv.mkDerivation {
name = "nix-perl-${version}";
@ -221,7 +258,8 @@
boost
nlohmann_json
]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium;
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
configureFlags = ''
--with-dbi=${perlPackages.DBI}/${pkgs.perl.libPrefix}
@ -236,21 +274,23 @@
};
lowdown = with final; stdenv.mkDerivation rec {
name = "lowdown-0.8.0";
name = "lowdown-0.8.4";
/*
src = fetchurl {
url = "https://kristaps.bsd.lv/lowdown/snapshots/${name}.tar.gz";
hash = "sha512-U9WeGoInT9vrawwa57t6u9dEdRge4/P+0wLxmQyOL9nhzOEUU2FRz2Be9H0dCjYE7p2v3vCXIYk40M+jjULATw==";
};
*/
#src = lowdown-src;
src = lowdown-src;
outputs = [ "out" "bin" "dev" ];
nativeBuildInputs = [ buildPackages.which ];
configurePhase =
''
configurePhase = ''
${if (stdenv.isDarwin && stdenv.isAarch64) then "echo \"HAVE_SANDBOX_INIT=false\" > configure.local" else ""}
./configure \
PREFIX=${placeholder "dev"} \
BINDIR=${placeholder "bin"}/bin
@ -353,7 +393,7 @@
# to https://nixos.org/nix/install. It downloads the binary
# tarball for the user's system and calls the second half of the
# installation script.
installerScript = installScriptFor [ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ];
installerScript = installScriptFor [ "x86_64-linux" "i686-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
installerScriptForGHA = installScriptFor [ "x86_64-linux" "x86_64-darwin" ];
# Line coverage analysis.
@ -439,6 +479,15 @@
checks = forAllSystems (system: {
binaryTarball = self.hydraJobs.binaryTarball.${system};
perlBindings = self.hydraJobs.perlBindings.${system};
installTests =
let pkgs = nixpkgsFor.${system}; in
pkgs.runCommand "install-tests" {
againstSelf = testNixVersions pkgs pkgs.nix pkgs.pkgs.nix;
againstCurrentUnstable = testNixVersions pkgs pkgs.nix pkgs.nixUnstable;
# Disabled because the latest stable version doesn't handle
# `NIX_DAEMON_SOCKET_PATH` which is required for the tests to work
# againstLatestStable = testNixVersions pkgs pkgs.nix pkgs.nixStable;
} "touch $out";
});
packages = forAllSystems (system: {
@ -479,6 +528,8 @@
installCheckFlags = "sysconfdir=$(out)/etc";
stripAllList = ["bin"];
strictDeps = true;
};
} // builtins.listToAttrs (map (crossSystem: {
name = "nix-${crossSystem}";

16
maintainers/upload-release.pl
View file

@ -133,20 +133,8 @@ for my $fn (glob "$tmpDir/*") {
exit if $version =~ /pre/;
# Update Nixpkgs in a very hacky way.
# Update nix-fallback-paths.nix.
system("cd $nixpkgsDir && git pull") == 0 or die;
my $oldName = `nix-instantiate --eval $nixpkgsDir -A nix.name`; chomp $oldName;
my $oldHash = `nix-instantiate --eval $nixpkgsDir -A nix.src.outputHash`; chomp $oldHash;
print STDERR "old stable version in Nixpkgs = $oldName / $oldHash\n";
my $fn = "$nixpkgsDir/pkgs/tools/package-management/nix/default.nix";
my $oldFile = read_file($fn);
$oldFile =~ s/$oldName/"$releaseName"/g;
$oldFile =~ s/$oldHash/"$tarballHash"/g;
write_file($fn, $oldFile);
$oldName =~ s/nix-//g;
$oldName =~ s/"//g;
sub getStorePath {
my ($jobName) = @_;
@ -167,7 +155,7 @@ write_file("$nixpkgsDir/nixos/modules/installer/tools/nix-fallback-paths.nix",
" x86_64-darwin = \"" . getStorePath("build.x86_64-darwin") . "\";\n" .
"}\n");
system("cd $nixpkgsDir && git commit -a -m 'nix: $oldName -> $version'") == 0 or die;
system("cd $nixpkgsDir && git commit -a -m 'nix-fallback-paths.nix: Update to $version'") == 0 or die;
# Update the "latest" symlink.
$channelsBucket->add_key(

2
misc/launchd/org.nixos.nix-daemon.plist.in
View file

@ -19,7 +19,7 @@
<array>
<string>/bin/sh</string>
<string>-c</string>
<string>/bin/wait4path /nix/var/nix/profiles/default/bin/nix-daemon &amp;&amp; /nix/var/nix/profiles/default/bin/nix-daemon</string>
<string>/bin/wait4path /nix/var/nix/profiles/default/bin/nix-daemon &amp;&amp; exec /nix/var/nix/profiles/default/bin/nix-daemon</string>
</array>
<key>StandardErrorPath</key>
<string>/var/log/nix-daemon.log</string>

4
misc/zsh/completion.zsh
View file

@ -1,3 +1,5 @@
#compdef nix
function _nix() {
local ifs_bk="$IFS"
local input=("${(Q)words[@]}")
@ -18,4 +20,4 @@ function _nix() {
_describe 'nix' suggestions
}
compdef _nix nix
_nix "$@"

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

@ -0,0 +1 @@
$(eval $(call install-file-as, $(d)/completion.zsh, $(datarootdir)/zsh/site-functions/_nix, 0644))

9
nix-rust/local.mk
View file

@ -8,8 +8,13 @@ endif
libnixrust_PATH := $(d)/target/$(RUST_DIR)/libnixrust.$(SO_EXT)
libnixrust_INSTALL_PATH := $(libdir)/libnixrust.$(SO_EXT)
libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust -ldl
libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust -ldl
libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust
libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust
ifeq ($(OS), Linux)
libnixrust_LDFLAGS_USE += -ldl
libnixrust_LDFLAGS_USE_INSTALLED += -ldl
endif
ifeq ($(OS), Darwin)
libnixrust_BUILD_FLAGS = NIX_LDFLAGS="-undefined dynamic_lookup"

46
scripts/bigsur-nixbld-user-migration.sh Executable file
View file

@ -0,0 +1,46 @@
#!/usr/bin/env bash
((NEW_NIX_FIRST_BUILD_UID=301))
id_available(){
dscl . list /Users UniqueID | grep -E '\b'$1'\b' >/dev/null
}
change_nixbld_names_and_ids(){
local name uid next_id
((next_id=NEW_NIX_FIRST_BUILD_UID))
echo "Attempting to migrate nixbld users."
echo "Each user should change from nixbld# to _nixbld#"
echo "and their IDs relocated to $next_id+"
while read -r name uid; do
echo " Checking $name (uid: $uid)"
# iterate for a clean ID
while id_available "$next_id"; do
((next_id++))
if ((next_id >= 400)); then
echo "We've hit UID 400 without placing all of your users :("
echo "You should use the commands in this script as a starting"
echo "point to review your UID-space and manually move the"
echo "remaining users (or delete them, if you don't need them)."
exit 1
fi
done
if [[ $name == _* ]]; then
echo " It looks like $name has already been renamed--skipping."
else
# first 3 are cleanup, it's OK if they aren't here
sudo dscl . delete /Users/$name dsAttrTypeNative:_writers_passwd &>/dev/null || true
sudo dscl . change /Users/$name NFSHomeDirectory "/private/var/empty 1" "/var/empty" &>/dev/null || true
# remove existing user from group
sudo dseditgroup -o edit -t user -d $name nixbld || true
sudo dscl . change /Users/$name UniqueID $uid $next_id
sudo dscl . change /Users/$name RecordName $name _$name
# add renamed user to group
sudo dseditgroup -o edit -t user -a _$name nixbld
echo " $name migrated to _$name (uid: $next_id)"
fi
done < <(dscl . list /Users UniqueID | grep nixbld | sort -n -k2)
}
change_nixbld_names_and_ids

900
scripts/create-darwin-volume.sh
View file

@ -1,33 +1,262 @@
#!/bin/sh
set -e
#!/usr/bin/env bash
set -eu
set -o pipefail
root_disk() {
diskutil info -plist /
}
# I'm a little agnostic on the choices, but supporting a wide
# slate of uses for now, including:
# - import-only: `. create-darwin-volume.sh no-main[ ...]`
# - legacy: `./create-darwin-volume.sh` or `. create-darwin-volume.sh`
# (both will run main())
# - external alt-routine: `./create-darwin-volume.sh no-main func[ ...]`
if [ "${1-}" = "no-main" ]; then
shift
readonly _CREATE_VOLUME_NO_MAIN=1
else
readonly _CREATE_VOLUME_NO_MAIN=0
# declare some things we expect to inherit from install-multi-user
# I don't love this (because it's a bit of a kludge).
#
# CAUTION: (Dec 19 2020)
# This is a stopgap. It doesn't cover the full slate of
# identifiers we inherit--just those necessary to:
# - avoid breaking direct invocations of this script (here/now)
# - avoid hard-to-reverse structural changes before the call to rm
# single-user support is verified
#
# In the near-mid term, I (personally) think we should:
# - decide to deprecate the direct call and add a notice
# - fold all of this into install-darwin-multi-user.sh
# - intentionally remove the old direct-invocation form (kill the
# routine, replace this script w/ deprecation notice and a note
# on the remove-after date)
#
readonly NIX_ROOT="${NIX_ROOT:-/nix}"
# i.e., "disk1"
_sudo() {
shift # throw away the 'explanation'
/usr/bin/sudo "$@"
}
failure() {
if [ "$*" = "" ]; then
cat
else
echo "$@"
fi
exit 1
}
task() {
echo "$@"
}
fi
# usually "disk1"
root_disk_identifier() {
diskutil info -plist / | xmllint --xpath "/plist/dict/key[text()='ParentWholeDisk']/following-sibling::string[1]/text()" -
# For performance (~10ms vs 280ms) I'm parsing 'diskX' from stat output
# (~diskXsY)--but I'm retaining the more-semantic approach since
# it documents intent better.
# /usr/sbin/diskutil info -plist / | xmllint --xpath "/plist/dict/key[text()='ParentWholeDisk']/following-sibling::string[1]/text()" -
#
local special_device
special_device="$(/usr/bin/stat -f "%Sd" /)"
echo "${special_device%s[0-9]*}"
}
find_nix_volume() {
diskutil apfs list -plist "$1" | xmllint --xpath "(/plist/dict/array/dict/key[text()='Volumes']/following-sibling::array/dict/key[text()='Name']/following-sibling::string[starts-with(translate(text(),'N','n'),'nix')]/text())[1]" - 2>/dev/null || true
# make it easy to play w/ 'Case-sensitive APFS'
readonly NIX_VOLUME_FS="${NIX_VOLUME_FS:-APFS}"
readonly NIX_VOLUME_LABEL="${NIX_VOLUME_LABEL:-Nix Store}"
# Strongly assuming we'll make a volume on the device / is on
# But you can override NIX_VOLUME_USE_DISK to create it on some other device
readonly NIX_VOLUME_USE_DISK="${NIX_VOLUME_USE_DISK:-$(root_disk_identifier)}"
NIX_VOLUME_USE_SPECIAL="${NIX_VOLUME_USE_SPECIAL:-}"
NIX_VOLUME_USE_UUID="${NIX_VOLUME_USE_UUID:-}"
readonly NIX_VOLUME_MOUNTD_DEST="${NIX_VOLUME_MOUNTD_DEST:-/Library/LaunchDaemons/org.nixos.darwin-store.plist}"
if /usr/bin/fdesetup isactive >/dev/null; then
test_filevault_in_use() { return 0; }
# no readonly; we may modify if user refuses from cure_volume
NIX_VOLUME_DO_ENCRYPT="${NIX_VOLUME_DO_ENCRYPT:-1}"
else
test_filevault_in_use() { return 1; }
NIX_VOLUME_DO_ENCRYPT="${NIX_VOLUME_DO_ENCRYPT:-0}"
fi
should_encrypt_volume() {
test_filevault_in_use && (( NIX_VOLUME_DO_ENCRYPT == 1 ))
}
substep() {
printf " %s\n" "" "- $1" "" "${@:2}"
}
volumes_labeled() {
local label="$1"
xsltproc --novalid --stringparam label "$label" - <(/usr/sbin/ioreg -ra -c "AppleAPFSVolume") <<'EOF'
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:apply-templates select="/plist/array/dict/key[text()='IORegistryEntryName']/following-sibling::*[1][text()=$label]/.."/>
</xsl:template>
<xsl:template match="dict">
<xsl:apply-templates match="string" select="key[text()='BSD Name']/following-sibling::*[1]"/>
<xsl:text>=</xsl:text>
<xsl:apply-templates match="string" select="key[text()='UUID']/following-sibling::*[1]"/>
<xsl:text>&#xA;</xsl:text>
</xsl:template>
</xsl:stylesheet>
EOF
# I cut label out of the extracted values, but here it is for reference:
# <xsl:apply-templates match="string" select="key[text()='IORegistryEntryName']/following-sibling::*[1]"/>
# <xsl:text>=</xsl:text>
}
right_disk() {
local volume_special="$1" # (i.e., disk1s7)
[[ "$volume_special" == "$NIX_VOLUME_USE_DISK"s* ]]
}
right_volume() {
local volume_special="$1" # (i.e., disk1s7)
# if set, it must match; otherwise ensure it's on the right disk
if [ -z "$NIX_VOLUME_USE_SPECIAL" ]; then
if right_disk "$volume_special"; then
NIX_VOLUME_USE_SPECIAL="$volume_special" # latch on
return 0
else
return 1
fi
else
[ "$volume_special" = "$NIX_VOLUME_USE_SPECIAL" ]
fi
}
right_uuid() {
local volume_uuid="$1"
# if set, it must match; otherwise allow
if [ -z "$NIX_VOLUME_USE_UUID" ]; then
NIX_VOLUME_USE_UUID="$volume_uuid" # latch on
return 0
else
[ "$volume_uuid" = "$NIX_VOLUME_USE_UUID" ]
fi
}
cure_volumes() {
local found volume special uuid
# loop just in case they have more than one volume
# (nothing stops you from doing this)
for volume in $(volumes_labeled "$NIX_VOLUME_LABEL"); do
# CAUTION: this could (maybe) be a more normal read
# loop like:
# while IFS== read -r special uuid; do
# # ...
# done <<<"$(volumes_labeled "$NIX_VOLUME_LABEL")"
#
# I did it with for to skirt a problem with the obvious
# pattern replacing stdin and causing user prompts
# inside (which also use read and access stdin) to skip
#
# If there's an existing encrypted volume we can't find
# in keychain, the user never gets prompted to delete
# the volume, and the install fails.
#
# If you change this, a human needs to test a very
# specific scenario: you already have an encrypted
# Nix Store volume, and have deleted its credential
# from keychain. Ensure the script asks you if it can
# delete the volume, and then prompts for your sudo
# password to confirm.
#
# shellcheck disable=SC1097
IFS== read -r special uuid <<< "$volume"
# take the first one that's on the right disk
if [ -z "${found:-}" ]; then
if right_volume "$special" && right_uuid "$uuid"; then
cure_volume "$special" "$uuid"
found="${special} (${uuid})"
else
warning <<EOF
Ignoring ${special} (${uuid}) because I am looking for:
disk=${NIX_VOLUME_USE_DISK} special=${NIX_VOLUME_USE_SPECIAL:-${NIX_VOLUME_USE_DISK}sX} uuid=${NIX_VOLUME_USE_UUID:-any}
EOF
# TODO: give chance to delete if ! headless?
fi
else
warning <<EOF
Ignoring ${special} (${uuid}), already found target: $found
EOF
# TODO reminder? I feel like I want one
# idiom that reminds some warnings, or warns
# some reminders?
# TODO: if ! headless, chance to delete?
fi
done
if [ -z "${found:-}" ]; then
readonly NIX_VOLUME_USE_SPECIAL NIX_VOLUME_USE_UUID
fi
}
volume_encrypted() {
local volume_special="$1" # (i.e., disk1s7)
# Trying to match the first line of output; known first lines:
# No cryptographic users for <special>
# Cryptographic user for <special> (1 found)
# Cryptographic users for <special> (2 found)
/usr/sbin/diskutil apfs listCryptoUsers -plist "$volume_special" | /usr/bin/grep -q APFSCryptoUserUUID
}
test_fstab() {
grep -q "/nix apfs rw" /etc/fstab 2>/dev/null
/usr/bin/grep -q "$NIX_ROOT apfs rw" /etc/fstab 2>/dev/null
}
test_nix_symlink() {
[ -L "/nix" ] || grep -q "^nix." /etc/synthetic.conf 2>/dev/null
test_nix_root_is_symlink() {
[ -L "$NIX_ROOT" ]
}
test_synthetic_conf() {
grep -q "^nix$" /etc/synthetic.conf 2>/dev/null
test_synthetic_conf_either(){
/usr/bin/grep -qE "^${NIX_ROOT:1}($|\t.{3,}$)" /etc/synthetic.conf 2>/dev/null
}
test_synthetic_conf_mountable() {
/usr/bin/grep -q "^${NIX_ROOT:1}$" /etc/synthetic.conf 2>/dev/null
}
test_synthetic_conf_symlinked() {
/usr/bin/grep -qE "^${NIX_ROOT:1}\t.{3,}$" /etc/synthetic.conf 2>/dev/null
}
test_nix_volume_mountd_installed() {
test -e "$NIX_VOLUME_MOUNTD_DEST"
}
# current volume password
test_keychain_by_uuid() {
local volume_uuid="$1"
# Note: doesn't need sudo just to check; doesn't output pw
security find-generic-password -s "$volume_uuid" &>/dev/null
}
get_volume_pass() {
local volume_uuid="$1"
_sudo \
"to confirm keychain has a password that unlocks this volume" \
security find-generic-password -s "$volume_uuid" -w
}
verify_volume_pass() {
local volume_special="$1" # (i.e., disk1s7)
local volume_uuid="$2"
/usr/sbin/diskutil apfs unlockVolume "$volume_special" -verify -stdinpassphrase -user "$volume_uuid"
}
volume_pass_works() {
local volume_special="$1" # (i.e., disk1s7)
local volume_uuid="$2"
get_volume_pass "$volume_uuid" | verify_volume_pass "$volume_special" "$volume_uuid"
}
# Create the paths defined in synthetic.conf, saving us a reboot.
create_synthetic_objects(){
create_synthetic_objects() {
# Big Sur takes away the -B flag we were using and replaces it
# with a -t flag that appears to do the same thing (but they
# don't behave exactly the same way in terms of return values).
@ -41,129 +270,570 @@ create_synthetic_objects(){
}
test_nix() {
test -d "/nix"
test -d "$NIX_ROOT"
}
test_t2_chip_present(){
# Use xartutil to see if system has a t2 chip.
#
# This isn't well-documented on its own; until it is,
# let's keep track of knowledge/assumptions.
#
# Warnings:
# - Don't search "xart" if porn will cause you trouble :)
# - Other xartutil flags do dangerous things. Don't run them
# naively. If you must, search "xartutil" first.
#
# Assumptions:
# - the "xART session seeds recovery utility"
# appears to interact with xartstorageremoted
# - `sudo xartutil --list` lists xART sessions
# and their seeds and exits 0 if successful. If
# not, it exits 1 and prints an error such as:
# xartutil: ERROR: No supported link to the SEP present
# - xART sessions/seeds are present when a T2 chip is
# (and not, otherwise)
# - the presence of a T2 chip means a newly-created
# volume on the primary drive will be
# encrypted at rest
# - all together: `sudo xartutil --list`
# should exit 0 if a new Nix Store volume will
# be encrypted at rest, and exit 1 if not.
sudo xartutil --list >/dev/null 2>/dev/null
test_voldaemon() {
test -f "$NIX_VOLUME_MOUNTD_DEST"
}
test_filevault_in_use() {
fdesetup isactive >/dev/null
generate_mount_command() {
local cmd_type="$1" # encrypted|unencrypted
local volume_uuid mountpoint cmd=()
printf -v volume_uuid "%q" "$2"
printf -v mountpoint "%q" "$NIX_ROOT"
case "$cmd_type" in
encrypted)
cmd=(/bin/sh -c "/usr/bin/security find-generic-password -s '$volume_uuid' -w | /usr/sbin/diskutil apfs unlockVolume '$volume_uuid' -mountpoint '$mountpoint' -stdinpassphrase");;
unencrypted)
cmd=(/usr/sbin/diskutil mount -mountPoint "$mountpoint" "$volume_uuid");;
*)
failure "Invalid first arg $cmd_type to generate_mount_command";;
esac
printf " <string>%s</string>\n" "${cmd[@]}"
}
# use after error msg for conditions we don't understand
suggest_report_error(){
# ex "error: something sad happened :(" >&2
echo " please report this @ https://github.com/nixos/nix/issues" >&2
generate_mount_daemon() {
local cmd_type="$1" # encrypted|unencrypted
local volume_uuid="$2"
cat <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>RunAtLoad</key>
<true/>
<key>Label</key>
<string>org.nixos.darwin-store</string>
<key>ProgramArguments</key>
<array>
$(generate_mount_command "$cmd_type" "$volume_uuid")
</array>
</dict>
</plist>
EOF
}
main() {
(
echo ""
echo " ------------------------------------------------------------------ "
echo " | This installer will create a volume for the nix store and |"
echo " | configure it to mount at /nix. Follow these steps to uninstall. |"
echo " ------------------------------------------------------------------ "
echo ""
echo " 1. Remove the entry from fstab using 'sudo vifs'"
echo " 2. Destroy the data volume using 'diskutil apfs deleteVolume'"
echo " 3. Remove the 'nix' line from /etc/synthetic.conf or the file"
echo ""
) >&2
_eat_bootout_err() {
/usr/bin/grep -v "Boot-out failed: 36: Operation now in progress"
}
if test_nix_symlink; then
echo "error: /nix is a symlink, please remove it and make sure it's not in synthetic.conf (in which case a reboot is required)" >&2
echo " /nix -> $(readlink "/nix")" >&2
exit 2
# TODO: remove with --uninstall?
uninstall_launch_daemon_directions() {
local daemon_label="$1" # i.e., org.nixos.blah-blah
local daemon_plist="$2" # abspath
substep "Uninstall LaunchDaemon $daemon_label" \
" sudo launchctl bootout system/$daemon_label" \
" sudo rm $daemon_plist"
}
uninstall_launch_daemon_prompt() {
local daemon_label="$1" # i.e., org.nixos.blah-blah
local daemon_plist="$2" # abspath
local reason_for_daemon="$3"
cat <<EOF
The installer adds a LaunchDaemon to $reason_for_daemon: $daemon_label
EOF
if ui_confirm "Can I remove it?"; then
_sudo "to terminate the daemon" \
launchctl bootout "system/$daemon_label" 2> >(_eat_bootout_err >&2) || true
# this can "fail" with a message like:
# Boot-out failed: 36: Operation now in progress
_sudo "to remove the daemon definition" rm "$daemon_plist"
fi
}
nix_volume_mountd_uninstall_directions() {
uninstall_launch_daemon_directions "org.nixos.darwin-store" \
"$NIX_VOLUME_MOUNTD_DEST"
}
nix_volume_mountd_uninstall_prompt() {
uninstall_launch_daemon_prompt "org.nixos.darwin-store" \
"$NIX_VOLUME_MOUNTD_DEST" \
"mount your Nix volume"
}
# TODO: move nix_daemon to install-darwin-multi-user if/when uninstall_launch_daemon_prompt moves up to install-multi-user
nix_daemon_uninstall_prompt() {
uninstall_launch_daemon_prompt "org.nixos.nix-daemon" \
"$NIX_DAEMON_DEST" \
"run the nix-daemon"
}
# TODO: remove with --uninstall?
nix_daemon_uninstall_directions() {
uninstall_launch_daemon_directions "org.nixos.nix-daemon" \
"$NIX_DAEMON_DEST"
}
# TODO: remove with --uninstall?
synthetic_conf_uninstall_directions() {
# :1 to strip leading slash
substep "Remove ${NIX_ROOT:1} from /etc/synthetic.conf" \
" If nix is the only entry: sudo rm /etc/synthetic.conf" \
" Otherwise: sudo /usr/bin/sed -i '' -e '/^${NIX_ROOT:1}$/d' /etc/synthetic.conf"
}
synthetic_conf_uninstall_prompt() {
cat <<EOF
During install, I add '${NIX_ROOT:1}' to /etc/synthetic.conf, which instructs
macOS to create an empty root directory for mounting the Nix volume.
EOF
# make the edit to a copy
/usr/bin/grep -vE "^${NIX_ROOT:1}($|\t.{3,}$)" /etc/synthetic.conf > "$SCRATCH/synthetic.conf.edit"
if test_synthetic_conf_symlinked; then
warning <<EOF
/etc/synthetic.conf already contains a line instructing your system
to make '${NIX_ROOT}' as a symlink:
$(/usr/bin/grep -nE "^${NIX_ROOT:1}\t.{3,}$" /etc/synthetic.conf)
This may mean your system has/had a non-standard Nix install.
The volume-creation process in this installer is *not* compatible
with a symlinked store, so I'll have to remove this instruction to
continue.
If you want/need to keep this instruction, answer 'n' to abort.
EOF
fi
if ! test_synthetic_conf; then
echo "Configuring /etc/synthetic.conf..." >&2
echo nix | sudo tee -a /etc/synthetic.conf
if ! test_synthetic_conf; then
echo "error: failed to configure synthetic.conf;" >&2
suggest_report_error
exit 1
# ask to rm if this left the file empty aside from comments, else edit
if /usr/bin/diff -q <(:) <(/usr/bin/grep -v "^#" "$SCRATCH/synthetic.conf.edit") &>/dev/null; then
if confirm_rm "/etc/synthetic.conf"; then
if test_nix_root_is_symlink; then
failure >&2 <<EOF
I removed /etc/synthetic.conf, but $NIX_ROOT is already a symlink
(-> $(readlink "$NIX_ROOT")). The system should remove it when you reboot.
Once you've rebooted, run the installer again.
EOF
fi
return 0
fi
else
if confirm_edit "$SCRATCH/synthetic.conf.edit" "/etc/synthetic.conf"; then
if test_nix_root_is_symlink; then
failure >&2 <<EOF
I edited Nix out of /etc/synthetic.conf, but $NIX_ROOT is already a symlink
(-> $(readlink "$NIX_ROOT")). The system should remove it when you reboot.
Once you've rebooted, run the installer again.
EOF
fi
return 0
fi
fi
# fallback instructions
echo "Manually remove nix from /etc/synthetic.conf"
return 1
}
if ! test_nix; then
echo "Creating mountpoint for /nix..." >&2
create_synthetic_objects # the ones we defined in synthetic.conf
if ! test_nix; then
sudo mkdir -p /nix 2>/dev/null || true
add_nix_vol_fstab_line() {
local uuid="$1"
# shellcheck disable=SC1003,SC2026
local escaped_mountpoint="${NIX_ROOT/ /'\\\'040}"
shift
EDITOR="/usr/bin/ex" _sudo "to add nix to fstab" "$@" <<EOF
:a
UUID=$uuid $escaped_mountpoint apfs rw,noauto,nobrowse,suid,owners
.
:x
EOF
# TODO: preserving my notes on suid,owners above until resolved
# There *may* be some issue regarding volume ownership, see nix#3156
#
# It seems like the cheapest fix is adding "suid,owners" to fstab, but:
# - We don't have much info on this condition yet
# - I'm not certain if these cause other problems?
# - There's a "chown" component some people claim to need to fix this
# that I don't understand yet
# (Note however that I've had to add a chown step to handle
# single->multi-user reinstalls, which may cover this)
#
# I'm not sure if it's safe to approach this way?
#
# I think I think the most-proper way to test for it is:
# diskutil info -plist "$NIX_VOLUME_LABEL" | xmllint --xpath "(/plist/dict/key[text()='GlobalPermissionsEnabled'])/following-sibling::*[1][name()='true']" -; echo $?
#
# There's also `sudo /usr/sbin/vsdbutil -c /path` (which is much faster, but is also
# deprecated and needs minor parsing).
#
# If no one finds a problem with doing so, I think the simplest approach
# is to just eagerly set this. I found a few imperative approaches:
# (diskutil enableOwnership, ~100ms), a cheap one (/usr/sbin/vsdbutil -a, ~40-50ms),
# a very cheap one (append the internal format to /var/db/volinfo.database).
#
# But vsdbutil's deprecation notice suggests using fstab, so I want to
# give that a whirl first.
#
# TODO: when this is workable, poke infinisil about reproducing the issue
# and confirming this fix?
}
delete_nix_vol_fstab_line() {
# TODO: I'm scaffolding this to handle the new nix volumes
# but it might be nice to generalize a smidge further to
# go ahead and set up a pattern for curing "old" things
# we no longer do?
EDITOR="/usr/bin/patch" _sudo "to cut nix from fstab" "$@" < <(/usr/bin/diff /etc/fstab <(/usr/bin/grep -v "$NIX_ROOT apfs rw" /etc/fstab))
# leaving some parts out of the grep; people may fiddle this a little?
}
# TODO: hope to remove with --uninstall
fstab_uninstall_directions() {
substep "Remove ${NIX_ROOT} from /etc/fstab" \
" If nix is the only entry: sudo rm /etc/fstab" \
" Otherwise, run 'sudo /usr/sbin/vifs' to remove the nix line"
}
fstab_uninstall_prompt() {
cat <<EOF
During install, I add '${NIX_ROOT}' to /etc/fstab so that macOS knows what
mount options to use for the Nix volume.
EOF
cp /etc/fstab "$SCRATCH/fstab.edit"
# technically doesn't need the _sudo path, but throwing away the
# output is probably better than mostly-duplicating the code...
delete_nix_vol_fstab_line patch "$SCRATCH/fstab.edit" &>/dev/null
# if the patch test edit, minus comment lines, is equal to empty (:)
if /usr/bin/diff -q <(:) <(/usr/bin/grep -v "^#" "$SCRATCH/fstab.edit") &>/dev/null; then
# this edit would leave it empty; propose deleting it
if confirm_rm "/etc/fstab"; then
return 0
else
echo "Remove nix from /etc/fstab (or remove the file)"
fi
if ! test_nix; then
echo "error: failed to bootstrap /nix; if a reboot doesn't help," >&2
suggest_report_error
exit 1
else
echo "I might be able to help you make this edit. Here's the diff:"
if ! _diff "/etc/fstab" "$SCRATCH/fstab.edit" && ui_confirm "Does the change above look right?"; then
delete_nix_vol_fstab_line /usr/sbin/vifs
else
echo "Remove nix from /etc/fstab (or remove the file)"
fi
fi
}
disk="$(root_disk_identifier)"
volume=$(find_nix_volume "$disk")
if [ -z "$volume" ]; then
echo "Creating a Nix Store volume..." >&2
remove_volume() {
local volume_special="$1" # (i.e., disk1s7)
_sudo "to unmount the Nix volume" \
/usr/sbin/diskutil unmount force "$volume_special" || true # might not be mounted
_sudo "to delete the Nix volume" \
/usr/sbin/diskutil apfs deleteVolume "$volume_special"
}
if test_filevault_in_use; then
# TODO: Not sure if it's in-scope now, but `diskutil apfs list`
# shows both filevault and encrypted at rest status, and it
# may be the more semantic way to test for this? It'll show
# `FileVault: No (Encrypted at rest)`
# `FileVault: No`
# `FileVault: Yes (Unlocked)`
# and so on.
if test_t2_chip_present; then
echo "warning: boot volume is FileVault-encrypted, but the Nix store volume" >&2
echo " is only encrypted at rest." >&2
echo " See https://nixos.org/nix/manual/#sect-macos-installation" >&2
# aspiration: robust enough to both fix problems
# *and* update older darwin volumes
cure_volume() {
local volume_special="$1" # (i.e., disk1s7)
local volume_uuid="$2"
header "Found existing Nix volume"
row " special" "$volume_special"
row " uuid" "$volume_uuid"
if volume_encrypted "$volume_special"; then
row "encrypted" "yes"
if volume_pass_works "$volume_special" "$volume_uuid"; then
NIX_VOLUME_DO_ENCRYPT=0
ok "Found a working decryption password in keychain :)"
echo ""
else
# - this is a volume we made, and
# - the user encrypted it on their own
# - something deleted the credential
# - this is an old or BYO volume and the pw
# just isn't somewhere we can find it.
#
# We're going to explain why we're freaking out
# and prompt them to either delete the volume
# (requiring a sudo auth), or abort to fix
warning <<EOF
This volume is encrypted, but I don't see a password to decrypt it.
The quick fix is to let me delete this volume and make you a new one.
If that's okay, enter your (sudo) password to continue. If not, you
can ensure the decryption password is in your system keychain with a
"Where" (service) field set to this volume's UUID:
$volume_uuid
EOF
if password_confirm "delete this volume"; then
remove_volume "$volume_special"
else
echo "error: refusing to create Nix store volume because the boot volume is" >&2
echo " FileVault encrypted, but encryption-at-rest is not available." >&2
echo " Manually create a volume for the store and re-run this script." >&2
echo " See https://nixos.org/nix/manual/#sect-macos-installation" >&2
exit 1
# TODO: this is a good design case for a warn-and
# remind idiom...
failure <<EOF
Your Nix volume is encrypted, but I couldn't find its password. Either:
- Delete or rename the volume out of the way
- Ensure its decryption password is in the system keychain with a
"Where" (service) field set to this volume's UUID:
$volume_uuid
EOF
fi
fi
elif test_filevault_in_use; then
row "encrypted" "no"
warning <<EOF
FileVault is on, but your $NIX_VOLUME_LABEL volume isn't encrypted.
EOF
# if we're interactive, give them a chance to
# encrypt the volume. If not, /shrug
if ! headless && (( NIX_VOLUME_DO_ENCRYPT == 1 )); then
if ui_confirm "Should I encrypt it and add the decryption key to your keychain?"; then
encrypt_volume "$volume_uuid" "$NIX_VOLUME_LABEL"
NIX_VOLUME_DO_ENCRYPT=0
else
NIX_VOLUME_DO_ENCRYPT=0
reminder "FileVault is on, but your $NIX_VOLUME_LABEL volume isn't encrypted."
fi
fi
sudo diskutil apfs addVolume "$disk" APFS 'Nix Store' -mountpoint /nix
volume="Nix Store"
else
echo "Using existing '$volume' volume" >&2
fi
if ! test_fstab; then
echo "Configuring /etc/fstab..." >&2
label=$(echo "$volume" | sed 's/ /\\040/g')
# shellcheck disable=SC2209
printf "\$a\nLABEL=%s /nix apfs rw,nobrowse\n.\nwq\n" "$label" | EDITOR=ed sudo vifs
row "encrypted" "no"
fi
}
main "$@"
remove_volume_artifacts() {
if test_synthetic_conf_either; then
# NIX_ROOT is in synthetic.conf
if synthetic_conf_uninstall_prompt; then
# TODO: moot until we tackle uninstall, but when we're
# actually uninstalling, we should issue:
# reminder "macOS will clean up the empty mount-point directory at $NIX_ROOT on reboot."
:
fi
fi
if test_fstab; then
fstab_uninstall_prompt
fi
if test_nix_volume_mountd_installed; then
nix_volume_mountd_uninstall_prompt
fi
}
setup_synthetic_conf() {
if test_nix_root_is_symlink; then
if ! test_synthetic_conf_symlinked; then
failure >&2 <<EOF
error: $NIX_ROOT is a symlink (-> $(readlink "$NIX_ROOT")).
Please remove it. If nix is in /etc/synthetic.conf, remove it and reboot.
EOF
fi
fi
if ! test_synthetic_conf_mountable; then
task "Configuring /etc/synthetic.conf to make a mount-point at $NIX_ROOT" >&2
# technically /etc/synthetic.d/nix is supported in Big Sur+
# but handling both takes even more code...
_sudo "to add Nix to /etc/synthetic.conf" \
/usr/bin/ex /etc/synthetic.conf <<EOF
:a
${NIX_ROOT:1}
.
:x
EOF
if ! test_synthetic_conf_mountable; then
failure "error: failed to configure synthetic.conf" >&2
fi
create_synthetic_objects
if ! test_nix; then
failure >&2 <<EOF
error: failed to bootstrap $NIX_ROOT
If you enabled FileVault after booting, this is likely a known issue
with macOS that you'll have to reboot to fix. If you didn't enable FV,
though, please open an issue describing how the system that you see
this error on was set up.
EOF
fi
fi
}
setup_fstab() {
local volume_uuid="$1"
# fstab used to be responsible for mounting the volume. Now the last
# step adds a LaunchDaemon responsible for mounting. This is technically
# redundant for mounting, but diskutil appears to pick up mount options
# from fstab (and diskutil's support for specifying them directly is not
# consistent across versions/subcommands).
if ! test_fstab; then
task "Configuring /etc/fstab to specify volume mount options" >&2
add_nix_vol_fstab_line "$volume_uuid" /usr/sbin/vifs
fi
}
encrypt_volume() {
local volume_uuid="$1"
local volume_label="$2"
local password
# Note: mount/unmount are late additions to support the right order
# of operations for creating the volume and then baking its uuid into
# other artifacts; not as well-trod wrt to potential errors, race
# conditions, etc.
/usr/sbin/diskutil mount "$volume_label"
password="$(/usr/bin/xxd -l 32 -p -c 256 /dev/random)"
_sudo "to add your Nix volume's password to Keychain" \
/usr/bin/security -i <<EOF
add-generic-password -a "$volume_label" -s "$volume_uuid" -l "$volume_label encryption password" -D "Encrypted volume password" -j "Added automatically by the Nix installer for use by $NIX_VOLUME_MOUNTD_DEST" -w "$password" -T /System/Library/CoreServices/APFSUserAgent -T /System/Library/CoreServices/CSUserAgent -T /usr/bin/security "/Library/Keychains/System.keychain"
EOF
builtin printf "%s" "$password" | _sudo "to encrypt your Nix volume" \
/usr/sbin/diskutil apfs encryptVolume "$volume_label" -user disk -stdinpassphrase
/usr/sbin/diskutil unmount force "$volume_label"
}
create_volume() {
# Notes:
# 1) using `-nomount` instead of `-mountpoint "$NIX_ROOT"` to get
# its UUID and set mount opts in fstab before first mount
#
# 2) system is in some sense less secure than user keychain... (it's
# possible to read the password for decrypting the keychain) but
# the user keychain appears to be available too late. As far as I
# can tell, the file with this password (/var/db/SystemKey) is
# inside the FileVault envelope. If that isn't true, it may make
# sense to store the password inside the envelope?
#
# 3) At some point it would be ideal to have a small binary to serve
# as the daemon itself, and for it to replace /usr/bin/security here.
#
# 4) *UserAgent exemptions should let the system seamlessly supply the
# password if noauto is removed from fstab entry. This is intentional;
# the user will hopefully look for help if the volume stops mounting,
# rather than failing over into subtle race-condition problems.
#
# 5) If we ever get users griping about not having space to do
# anything useful with Nix, it is possibly to specify
# `-reserve 10g` or something, which will fail w/o that much
#
# 6) getting special w/ awk may be fragile, but doing it to:
# - save time over running slow diskutil commands
# - skirt risk we grab wrong volume if multiple match
/usr/sbin/diskutil apfs addVolume "$NIX_VOLUME_USE_DISK" "$NIX_VOLUME_FS" "$NIX_VOLUME_LABEL" -nomount | /usr/bin/awk '/Created new APFS Volume/ {print $5}'
}
volume_uuid_from_special() {
local volume_special="$1" # (i.e., disk1s7)
# For reasons I won't pretend to fathom, this returns 253 when it works
/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util -k "$volume_special" || true
}
# this sometimes clears immediately, and AFAIK clears
# within about 1s. diskutil info on an unmounted path
# fails in around 50-100ms and a match takes about
# 250-300ms. I suspect it's usually ~250-750ms
await_volume() {
# caution: this could, in theory, get stuck
until /usr/sbin/diskutil info "$NIX_ROOT" &>/dev/null; do
:
done
}
setup_volume() {
local use_special use_uuid profile_packages
task "Creating a Nix volume" >&2
# DOING: I'm tempted to wrap this call in a grep to get the new disk special without doing anything too complex, but this sudo wrapper *is* a little complex, so it'll be a PITA unless maybe we can skip sudo on this. Let's just try it without.
use_special="${NIX_VOLUME_USE_SPECIAL:-$(create_volume)}"
use_uuid=${NIX_VOLUME_USE_UUID:-$(volume_uuid_from_special "$use_special")}
setup_fstab "$use_uuid"
if should_encrypt_volume; then
encrypt_volume "$use_uuid" "$NIX_VOLUME_LABEL"
setup_volume_daemon "encrypted" "$use_uuid"
# TODO: might be able to save ~60ms by caching or setting
# this somewhere rather than re-checking here.
elif volume_encrypted "$use_special"; then
setup_volume_daemon "encrypted" "$use_uuid"
else
setup_volume_daemon "unencrypted" "$use_uuid"
fi
await_volume
# TODO: below is a vague kludge for now; I just don't know
# what if any safe action there is to take here. Also, the
# reminder isn't very helpful.
# I'm less sure where this belongs, but it also wants mounted, pre-install
if type -p nix-env; then
profile_packages="$(nix-env --query --installed)"
# TODO: can probably do below faster w/ read
# intentionally unquoted string to eat whitespace in wc output
# shellcheck disable=SC2046,SC2059
if ! [ $(printf "$profile_packages" | /usr/bin/wc -l) = "0" ]; then
reminder <<EOF
Nix now supports only multi-user installs on Darwin/macOS, and your user's
Nix profile has some packages in it. These packages may obscure those in the
default profile, including the Nix this installer will add. You should
review these packages:
$profile_packages
EOF
fi
fi
}
setup_volume_daemon() {
local cmd_type="$1" # encrypted|unencrypted
local volume_uuid="$2"
if ! test_voldaemon; then
task "Configuring LaunchDaemon to mount '$NIX_VOLUME_LABEL'" >&2
_sudo "to install the Nix volume mounter" /usr/bin/ex "$NIX_VOLUME_MOUNTD_DEST" <<EOF
:a
$(generate_mount_daemon "$cmd_type" "$volume_uuid")
.
:x
EOF
# TODO: should probably alert the user if this is disabled?
_sudo "to launch the Nix volume mounter" \
launchctl bootstrap system "$NIX_VOLUME_MOUNTD_DEST" || true
# TODO: confirm whether kickstart is necessesary?
# I feel a little superstitous, but it can guard
# against multiple problems (doesn't start, old
# version still running for some reason...)
_sudo "to launch the Nix volume mounter" \
launchctl kickstart -k system/org.nixos.darwin-store
fi
}
setup_darwin_volume() {
setup_synthetic_conf
setup_volume
}
if [ "$_CREATE_VOLUME_NO_MAIN" = 1 ]; then
if [ -n "$*" ]; then
"$@" # expose functions in case we want multiple routines?
fi
else
# no reason to pay for bash to process this
main() {
{
echo ""
echo " ------------------------------------------------------------------ "
echo " | This installer will create a volume for the nix store and |"
echo " | configure it to mount at $NIX_ROOT. Follow these steps to uninstall. |"
echo " ------------------------------------------------------------------ "
echo ""
echo " 1. Remove the entry from fstab using 'sudo /usr/sbin/vifs'"
echo " 2. Run 'sudo launchctl bootout system/org.nixos.darwin-store'"
echo " 3. Remove $NIX_VOLUME_MOUNTD_DEST"
echo " 4. Destroy the data volume using '/usr/sbin/diskutil apfs deleteVolume'"
echo " 5. Remove the 'nix' line from /etc/synthetic.conf (or the file)"
echo ""
} >&2
setup_darwin_volume
}
main "$@"
fi

110
scripts/install-darwin-multi-user.sh
View file

@ -3,57 +3,99 @@
set -eu
set -o pipefail
readonly PLIST_DEST=/Library/LaunchDaemons/org.nixos.nix-daemon.plist
readonly NIX_DAEMON_DEST=/Library/LaunchDaemons/org.nixos.nix-daemon.plist
# create by default; set 0 to DIY, use a symlink, etc.
readonly NIX_VOLUME_CREATE=${NIX_VOLUME_CREATE:-1} # now default
NIX_FIRST_BUILD_UID="301"
NIX_BUILD_USER_NAME_TEMPLATE="_nixbld%d"
# caution: may update times on / if not run as normal non-root user
read_only_root() {
# this touch command ~should~ always produce an error
# as of this change I confirmed /usr/bin/touch emits:
# "touch: /: Read-only file system" Catalina+ and Big Sur
# "touch: /: Permission denied" Mojave
# (not matching prefix for compat w/ coreutils touch in case using
# an explicit path causes problems; its prefix differs)
[[ "$(/usr/bin/touch / 2>&1)" = *"Read-only file system" ]]
# Avoiding the slow semantic way to get this information (~330ms vs ~8ms)
# unless using touch causes problems. Just in case, that approach is:
# diskutil info -plist / | <find the Writable or WritableVolume keys>, i.e.
# diskutil info -plist / | xmllint --xpath "name(/plist/dict/key[text()='Writable']/following-sibling::*[1])" -
}
if read_only_root && [ "$NIX_VOLUME_CREATE" = 1 ]; then
should_create_volume() { return 0; }
else
should_create_volume() { return 1; }
fi
# shellcheck source=./create-darwin-volume.sh
. "$EXTRACTED_NIX_PATH/create-darwin-volume.sh" "no-main"
dsclattr() {
/usr/bin/dscl . -read "$1" \
| awk "/$2/ { print \$2 }"
| /usr/bin/awk "/$2/ { print \$2 }"
}
poly_validate_assumptions() {
if [ "$(uname -s)" != "Darwin" ]; then
failure "This script is for use with macOS!"
test_nix_daemon_installed() {
test -e "$NIX_DAEMON_DEST"
}
poly_cure_artifacts() {
if should_create_volume; then
task "Fixing any leftover Nix volume state"
cat <<EOF
Before I try to install, I'll check for any existing Nix volume config
and ask for your permission to remove it (so that the installer can
start fresh). I'll also ask for permission to fix any issues I spot.
EOF
cure_volumes
remove_volume_artifacts
fi
}
poly_service_installed_check() {
[ -e "$PLIST_DEST" ]
if should_create_volume; then
test_nix_daemon_installed || test_nix_volume_mountd_installed
else
test_nix_daemon_installed
fi
}
poly_service_uninstall_directions() {
cat <<EOF
$1. Delete $PLIST_DEST
sudo launchctl unload $PLIST_DEST
sudo rm $PLIST_DEST
EOF
echo "$1. Remove macOS-specific components:"
if should_create_volume && test_nix_volume_mountd_installed; then
darwin_volume_uninstall_directions
fi
if test_nix_daemon_installed; then
nix_daemon_uninstall_directions
fi
}
poly_service_setup_note() {
cat <<EOF
- load and start a LaunchDaemon (at $PLIST_DEST) for nix-daemon
EOF
if should_create_volume; then
echo " - create a Nix volume and a LaunchDaemon to mount it"
fi
echo " - create a LaunchDaemon (at $NIX_DAEMON_DEST) for nix-daemon"
echo ""
}
poly_extra_try_me_commands(){
:
}
poly_extra_setup_instructions(){
:
poly_extra_try_me_commands() {
:
}
poly_configure_nix_daemon_service() {
task "Setting up the nix-daemon LaunchDaemon"
_sudo "to set up the nix-daemon as a LaunchDaemon" \
cp -f "/nix/var/nix/profiles/default$PLIST_DEST" "$PLIST_DEST"
/bin/cp -f "/nix/var/nix/profiles/default$NIX_DAEMON_DEST" "$NIX_DAEMON_DEST"
_sudo "to load the LaunchDaemon plist for nix-daemon" \
launchctl load /Library/LaunchDaemons/org.nixos.nix-daemon.plist
_sudo "to start the nix-daemon" \
launchctl start org.nixos.nix-daemon
launchctl kickstart -k system/org.nixos.nix-daemon
}
poly_group_exists() {
@ -94,6 +136,8 @@ poly_user_home_get() {
}
poly_user_home_set() {
# This can trigger a permission prompt now:
# "Terminal" would like to administer your computer. Administration can include modifying passwords, networking, and system settings.
_sudo "in order to give $1 a safe home directory" \
/usr/bin/dscl . -create "/Users/$1" "NFSHomeDirectory" "$2"
}
@ -119,7 +163,7 @@ poly_user_shell_set() {
poly_user_in_group_check() {
username=$1
group=$2
dseditgroup -o checkmember -m "$username" "$group" > /dev/null 2>&1
/usr/sbin/dseditgroup -o checkmember -m "$username" "$group" > /dev/null 2>&1
}
poly_user_in_group_set() {
@ -149,3 +193,17 @@ poly_create_build_user() {
/usr/bin/dscl . create "/Users/$username" \
UniqueID "${uid}"
}
poly_prepare_to_install() {
if should_create_volume; then
header "Preparing a Nix volume"
# intentional indent below to match task indent
cat <<EOF
Nix traditionally stores its data in the root directory $NIX_ROOT, but
macOS now (starting in 10.15 Catalina) has a read-only root directory.
To support Nix, I will create a volume and configure macOS to mount it
at $NIX_ROOT.
EOF
setup_darwin_volume
fi
}

298
scripts/install-multi-user.sh
View file

@ -25,13 +25,15 @@ readonly RED='\033[31m'
readonly NIX_USER_COUNT=${NIX_USER_COUNT:-32}
readonly NIX_BUILD_GROUP_ID="30000"
readonly NIX_BUILD_GROUP_NAME="nixbld"
readonly NIX_FIRST_BUILD_UID="30001"
# darwin installer needs to override these
NIX_FIRST_BUILD_UID="30001"
NIX_BUILD_USER_NAME_TEMPLATE="nixbld%d"
# Please don't change this. We don't support it, because the
# default shell profile that comes with Nix doesn't support it.
readonly NIX_ROOT="/nix"
readonly NIX_EXTRA_CONF=${NIX_EXTRA_CONF:-}
readonly PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshenv")
readonly PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshenv" "/etc/bash.bashrc" "/etc/zsh/zshenv")
readonly PROFILE_BACKUP_SUFFIX=".backup-before-nix"
readonly PROFILE_NIX_FILE="$NIX_ROOT/var/nix/profiles/default/etc/profile.d/nix-daemon.sh"
@ -41,7 +43,7 @@ readonly NIX_INSTALLED_CACERT="@cacert@"
#readonly NIX_INSTALLED_CACERT="/nix/store/7dxhzymvy330i28ii676fl1pqwcahv2f-nss-cacert-3.49.2"
readonly EXTRACTED_NIX_PATH="$(dirname "$0")"
readonly ROOT_HOME=$(echo ~root)
readonly ROOT_HOME=~root
if [ -t 0 ]; then
readonly IS_HEADLESS='no'
@ -57,14 +59,19 @@ headless() {
fi
}
contactme() {
contact_us() {
echo "You can open an issue at https://github.com/nixos/nix/issues"
echo ""
echo "Or feel free to contact the team:"
echo " - Matrix: #nix:nixos.org"
echo " - IRC: in #nixos on irc.libera.chat"
echo " - twitter: @nixos_org"
echo " - forum: https://discourse.nixos.org"
}
get_help() {
echo "We'd love to help if you need it."
echo ""
echo "If you can, open an issue at https://github.com/nixos/nix/issues"
echo ""
echo "Or feel free to contact the team,"
echo " - on IRC #nixos on irc.freenode.net"
echo " - on twitter @nixos_org"
contact_us
}
uninstall_directions() {
@ -100,11 +107,10 @@ $step. Delete the files Nix added to your system:
and that is it.
EOF
}
nix_user_for_core() {
printf "nixbld%d" "$1"
printf "$NIX_BUILD_USER_NAME_TEMPLATE" "$1"
}
nix_uid_for_core() {
@ -168,7 +174,7 @@ failure() {
header "oh no!"
_textout "$RED" "$@"
echo ""
_textout "$RED" "$(contactme)"
_textout "$RED" "$(get_help)"
trap finish_cleanup EXIT
exit 1
}
@ -199,6 +205,95 @@ ui_confirm() {
return 1
}
printf -v _UNCHANGED_GRP_FMT "%b" $'\033[2m%='"$ESC" # "dim"
# bold+invert+red and bold+invert+green just for the +/- below
# red/green foreground for rest of the line
printf -v _OLD_LINE_FMT "%b" $'\033[1;7;31m-'"$ESC ${RED}%L${ESC}"
printf -v _NEW_LINE_FMT "%b" $'\033[1;7;32m+'"$ESC ${GREEN}%L${ESC}"
_diff() {
# simple colorized diff comatible w/ pre `--color` versions
diff --unchanged-group-format="$_UNCHANGED_GRP_FMT" --old-line-format="$_OLD_LINE_FMT" --new-line-format="$_NEW_LINE_FMT" --unchanged-line-format=" %L" "$@"
}
confirm_rm() {
local path="$1"
if ui_confirm "Can I remove $path?"; then
_sudo "to remove $path" rm "$path"
fi
}
confirm_edit() {
local path="$1"
local edit_path="$2"
cat <<EOF
Nix isn't the only thing in $path,
but I think I know how to edit it out.
Here's the diff:
EOF
# could technically test the diff, but caller should do it
_diff "$path" "$edit_path"
if ui_confirm "Does the change above look right?"; then
_sudo "remove nix from $path" cp "$edit_path" "$path"
fi
}
_SERIOUS_BUSINESS="${RED}%s:${ESC} "
password_confirm() {
local do_something_consequential="$1"
if ui_confirm "Can I $do_something_consequential?"; then
# shellcheck disable=SC2059
sudo -kv --prompt="$(printf "${_SERIOUS_BUSINESS}" "Enter your password to $do_something_consequential")"
else
return 1
fi
}
# Support accumulating reminders over the course of a run and showing
# them at the end. An example where this helps: the installer changes
# something, but it won't work without a reboot. If you tell the user
# when you do it, they may miss it in the stream. The value of the
# setting isn't enough to decide whether to message because you only
# need to message if you *changed* it.
# reminders stored in array delimited by empty entry; if ! headless,
# user is asked to confirm after each delimiter.
_reminders=()
((_remind_num=1))
remind() {
# (( arithmetic expression ))
if (( _remind_num > 1 )); then
header "Reminders"
for line in "${_reminders[@]}"; do
echo "$line"
if ! headless && [ "${#line}" = 0 ]; then
if read -r -p "Press enter/return to acknowledge."; then
printf $'\033[A\33[2K\r'
fi
fi
done
fi
}
reminder() {
printf -v label "${BLUE}[ %d ]${ESC}" "$_remind_num"
_reminders+=("$label")
if [[ "$*" = "" ]]; then
while read -r line; do
_reminders+=("$line")
done
else
# this expands each arg to an array entry (and each entry will
# ultimately be a separate line in the output)
_reminders+=("$@")
fi
_reminders+=("")
((_remind_num++))
}
__sudo() {
local expl="$1"
local cmd="$2"
@ -219,18 +314,18 @@ _sudo() {
local expl="$1"
shift
if ! headless; then
__sudo "$expl" "$*"
__sudo "$expl" "$*" >&2
fi
sudo "$@"
}
readonly SCRATCH=$(mktemp -d -t tmp.XXXXXXXXXX)
function finish_cleanup {
readonly SCRATCH=$(mktemp -d "${TMPDIR:-/tmp/}tmp.XXXXXXXXXX")
finish_cleanup() {
rm -rf "$SCRATCH"
}
function finish_fail {
finish_fail() {
finish_cleanup
failure <<EOF
@ -242,45 +337,46 @@ EOF
}
trap finish_fail EXIT
channel_update_failed=0
function finish_success {
finish_cleanup
finish_success() {
ok "Alright! We're done!"
if [ "x$channel_update_failed" = x1 ]; then
echo ""
echo "But fetching the nixpkgs channel failed. (Are you offline?)"
echo "To try again later, run \"sudo -i nix-channel --update nixpkgs\"."
fi
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:
$(poly_extra_try_me_commands)
$ nix-shell -p nix-info --run "nix-info -m"
$(poly_extra_setup_instructions)
Thank you for using this installer. If you have any feedback, don't
hesitate:
$(contactme)
Thank you for using this installer. If you have any feedback or need
help, don't hesitate:
$(contact_us)
EOF
remind
finish_cleanup
}
finish_uninstall_success() {
ok "Alright! Nix should be removed!"
cat <<EOF
If you spot anything this uninstaller missed or have feedback,
don't hesitate:
$(contact_us)
EOF
remind
finish_cleanup
}
remove_nix_artifacts() {
failure "Not implemented yet"
}
cure_artifacts() {
poly_cure_artifacts
# remove_nix_artifacts (LATER)
}
validate_starting_assumptions() {
poly_validate_assumptions
if [ $EUID -eq 0 ]; then
failure <<EOF
Please do not run this script with root privileges. We will call sudo
when we need to.
EOF
fi
if type nix-env 2> /dev/null >&2; then
warning <<EOF
Nix already appears to be installed. This installer may run into issues.
@ -442,18 +538,46 @@ create_build_users() {
create_directories() {
# FIXME: remove all of this because it duplicates LocalStore::LocalStore().
task "Setting up the basic directory structure"
if [ -d "$NIX_ROOT" ]; then
# if /nix already exists, take ownership
#
# Caution: notes below are macOS-y
# This is a bit of a goldilocks zone for taking ownership
# if there are already files on the volume; the volume is
# now mounted, but we haven't added a bunch of new files
# this is probably a bit slow; I've been seeing 3.3-4s even
# when promptly installed over a fresh single-user install.
# In case anyone's aware of a shortcut.
# `|| true`: .Trashes errors w/o full disk perm
# rumor per #4488 that macOS 11.2 may not have
# sbin on path, and that's where chown is, but
# since this bit is cross-platform:
# - first try with `command -vp` to try and find
# chown in the usual places
# - fall back on `command -v` which would find
# any chown on path
# if we don't find one, the command is already
# hiding behind || true, and the general state
# should be one the user can repair once they
# figure out where chown is...
local get_chr_own="$(command -vp chown)"
if [[ -z "$get_chr_own" ]]; then
get_chr_own="$(command -v chown)"
fi
_sudo "to take root ownership of existing Nix store files" \
"$get_chr_own" -R "root:$NIX_BUILD_GROUP_NAME" "$NIX_ROOT" || true
fi
_sudo "to make the basic directory structure of Nix (part 1)" \
mkdir -pv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix{,/db,/gcroots,/profiles,/temproots,/userpool} /nix/var/nix/{gcroots,profiles}/per-user
install -dv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix{,/db,/gcroots,/profiles,/temproots,/userpool} /nix/var/nix/{gcroots,profiles}/per-user
_sudo "to make the basic directory structure of Nix (part 2)" \
mkdir -pv -m 1775 /nix/store
_sudo "to make the basic directory structure of Nix (part 3)" \
chgrp "$NIX_BUILD_GROUP_NAME" /nix/store
install -dv -g "$NIX_BUILD_GROUP_NAME" -m 1775 /nix/store
_sudo "to place the default nix daemon configuration (part 1)" \
mkdir -pv -m 0555 /etc/nix
install -dv -m 0555 /etc/nix
}
place_channel_configuration() {
@ -473,7 +597,7 @@ This installation tool will set up your computer with the Nix package
manager. This will happen in a few stages:
1. Make sure your computer doesn't already have Nix. If it does, I
will show you instructions on how to clean up your old one.
will show you instructions on how to clean up your old install.
2. Show you what we are going to install and where. Then we will ask
if you are ready to continue.
@ -572,6 +696,7 @@ EOF
}
install_from_extracted_nix() {
task "Installing Nix"
(
cd "$EXTRACTED_NIX_PATH"
@ -587,9 +712,8 @@ $NIX_INSTALLED_NIX.
EOF
fi
cat ./.reginfo \
| _sudo "to load data for the first time in to the Nix Database" \
"$NIX_INSTALLED_NIX/bin/nix-store" --load-db
_sudo "to load data for the first time in to the Nix Database" \
"$NIX_INSTALLED_NIX/bin/nix-store" --load-db < ./.reginfo
echo " Just finished getting the nix database ready."
)
@ -608,6 +732,7 @@ EOF
}
configure_shell_profile() {
task "Setting up shell profiles: ${PROFILE_TARGETS[*]}"
for profile_target in "${PROFILE_TARGETS[@]}"; do
if [ -e "$profile_target" ]; then
_sudo "to back up your current $profile_target to $profile_target$PROFILE_BACKUP_SUFFIX" \
@ -627,14 +752,27 @@ configure_shell_profile() {
tee -a "$profile_target"
fi
done
# TODO: should we suggest '. $PROFILE_NIX_FILE'? It would get them on
# their way less disruptively, but a counter-argument is that they won't
# immediately notice if something didn't get set up right?
reminder "Nix won't work in active shell sessions until you restart them."
}
cert_in_store() {
# in a subshell
# - change into the cert-file dir
# - get the phyiscal pwd
# and test if this path is in the Nix store
[[ "$(cd -- "$(dirname "$NIX_SSL_CERT_FILE")" && exec pwd -P)" == "$NIX_ROOT/store/"* ]]
}
setup_default_profile() {
_sudo "to installing a bootstrapping Nix in to the default Profile" \
task "Setting up the default profile"
_sudo "to install a bootstrapping Nix in to the default profile" \
HOME="$ROOT_HOME" "$NIX_INSTALLED_NIX/bin/nix-env" -i "$NIX_INSTALLED_NIX"
if [ -z "${NIX_SSL_CERT_FILE:-}" ] || ! [ -f "${NIX_SSL_CERT_FILE:-}" ]; then
_sudo "to installing a bootstrapping SSL certificate just for Nix in to the default Profile" \
if [ -z "${NIX_SSL_CERT_FILE:-}" ] || ! [ -f "${NIX_SSL_CERT_FILE:-}" ] || cert_in_store; then
_sudo "to install a bootstrapping SSL certificate just for Nix in to the default profile" \
HOME="$ROOT_HOME" "$NIX_INSTALLED_NIX/bin/nix-env" -i "$NIX_INSTALLED_CACERT"
export NIX_SSL_CERT_FILE=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
fi
@ -643,9 +781,13 @@ setup_default_profile() {
# Have to explicitly pass NIX_SSL_CERT_FILE as part of the sudo call,
# otherwise it will be lost in environments where sudo doesn't pass
# all the environment variables by default.
_sudo "to update the default channel in the default profile" \
HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs \
|| channel_update_failed=1
if ! _sudo "to update the default channel in the default profile" \
HOME="$ROOT_HOME" NIX_SSL_CERT_FILE="$NIX_SSL_CERT_FILE" "$NIX_INSTALLED_NIX/bin/nix-channel" --update nixpkgs; then
reminder <<EOF
I had trouble fetching the nixpkgs channel (are you offline?)
To try again later, run: sudo -i nix-channel --update nixpkgs
EOF
fi
fi
}
@ -660,6 +802,17 @@ EOF
}
main() {
# TODO: I've moved this out of validate_starting_assumptions so we
# can fail faster in this case. Sourcing install-darwin... now runs
# `touch /` to detect Read-only root, but it could update times on
# pre-Catalina macOS if run as root user.
if [ $EUID -eq 0 ]; then
failure <<EOF
Please do not run this script with root privileges. We will call sudo
when we need to.
EOF
fi
if [ "$(uname -s)" = "Darwin" ]; then
# shellcheck source=./install-darwin-multi-user.sh
. "$EXTRACTED_NIX_PATH/install-darwin-multi-user.sh"
@ -673,17 +826,24 @@ main() {
welcome_to_nix
chat_about_sudo
cure_artifacts
# TODO: there's a tension between cure and validate. I moved the
# the sudo/root check out of validate to the head of this func.
# Cure is *intended* to subsume the validate-and-abort approach,
# so it may eventually obsolete it.
validate_starting_assumptions
setup_report
if ! ui_confirm "Ready to continue?"; then
ok "Alright, no changes have been made :)"
contactme
get_help
trap finish_cleanup EXIT
exit 1
fi
poly_prepare_to_install
create_build_group
create_build_users
create_directories
@ -693,6 +853,7 @@ main() {
configure_shell_profile
set +eu
# shellcheck disable=SC1091
. /etc/profile
set -eu
@ -704,5 +865,20 @@ main() {
trap finish_success EXIT
}
# set an empty initial arg for bare invocations in case we need to
# disambiguate someone directly invoking this later.
if [ "${#@}" = 0 ]; then
set ""
fi
main
# ACTION for override
case "${1-}" in
# uninstall)
# shift
# uninstall "$@";;
# install == same as the no-arg condition for now (but, explicit)
""|install)
main;;
*) # holding space for future options (like uninstall + install?)
failure "install-multi-user: invalid argument";;
esac

91
scripts/install-nix-from-closure.sh
View file

@ -26,18 +26,9 @@ fi
# macOS support for 10.12.6 or higher
if [ "$(uname -s)" = "Darwin" ]; then
IFS='.' read macos_major macos_minor macos_patch << EOF
IFS='.' read -r macos_major macos_minor macos_patch << EOF
$(sw_vers -productVersion)
EOF
# TODO: this is a temporary speed-bump to keep people from naively installing Nix
# on macOS Big Sur (11.0+, 10.16+) until nixpkgs updates are ready for them.
# *Ideally* this is gone before next Nix release. If you're intentionally working on
# Nix + Big Sur, just comment out this block and be on your way :)
if [ "$macos_major" -gt 10 ] || { [ "$macos_major" -eq 10 ] && [ "$macos_minor" -gt 15 ]; }; then
echo "$0: nixpkgs isn't quite ready to support macOS $(sw_vers -productVersion) yet"
exit 1
fi
if [ "$macos_major" -lt 10 ] || { [ "$macos_major" -eq 10 ] && [ "$macos_minor" -lt 12 ]; } || { [ "$macos_minor" -eq 12 ] && [ "$macos_patch" -lt 6 ]; }; then
# patch may not be present; command substitution for simplicity
echo "$0: macOS $(sw_vers -productVersion) is not supported, upgrade to 10.12.6 or higher"
@ -46,21 +37,40 @@ EOF
fi
# Determine if we could use the multi-user installer or not
if [ "$(uname -s)" = "Darwin" ]; then
echo "Note: a multi-user installation is possible. See https://nixos.org/nix/manual/#sect-multi-user-installation" >&2
elif [ "$(uname -s)" = "Linux" ]; then
if [ "$(uname -s)" = "Linux" ]; then
echo "Note: a multi-user installation is possible. See https://nixos.org/nix/manual/#sect-multi-user-installation" >&2
fi
INSTALL_MODE=no-daemon
CREATE_DARWIN_VOLUME=0
case "$(uname -s)" in
"Darwin")
INSTALL_MODE=daemon;;
*)
INSTALL_MODE=no-daemon;;
esac
# space-separated string
ACTIONS=
# handle the command line flags
while [ $# -gt 0 ]; do
case $1 in
--daemon)
INSTALL_MODE=daemon;;
INSTALL_MODE=daemon
ACTIONS="${ACTIONS}install "
;;
--no-daemon)
INSTALL_MODE=no-daemon;;
if [ "$(uname -s)" = "Darwin" ]; then
printf '\e[1;31mError: --no-daemon installs are no-longer supported on Darwin/macOS!\e[0m\n' >&2
exit 1
fi
INSTALL_MODE=no-daemon
# intentional tail space
ACTIONS="${ACTIONS}install "
;;
# --uninstall)
# # intentional tail space
# ACTIONS="${ACTIONS}uninstall "
# ;;
--no-channel-add)
export NIX_INSTALLER_NO_CHANNEL_ADD=1;;
--daemon-user-count)
@ -69,13 +79,18 @@ while [ $# -gt 0 ]; do
--no-modify-profile)
NIX_INSTALLER_NO_MODIFY_PROFILE=1;;
--darwin-use-unencrypted-nix-store-volume)
CREATE_DARWIN_VOLUME=1;;
{
echo "Warning: the flag --darwin-use-unencrypted-nix-store-volume"
echo " is no longer needed and will be removed in the future."
echo ""
} >&2;;
--nix-extra-conf-file)
export NIX_EXTRA_CONF="$(cat $2)"
# shellcheck disable=SC2155
export NIX_EXTRA_CONF="$(cat "$2")"
shift;;
*)
(
echo "Nix Installer [--daemon|--no-daemon] [--daemon-user-count INT] [--no-channel-add] [--no-modify-profile] [--darwin-use-unencrypted-nix-store-volume] [--nix-extra-conf-file FILE]"
{
echo "Nix Installer [--daemon|--no-daemon] [--daemon-user-count INT] [--no-channel-add] [--no-modify-profile] [--nix-extra-conf-file FILE]"
echo "Choose installation method."
echo ""
@ -101,45 +116,16 @@ while [ $# -gt 0 ]; do
if [ -n "${INVOKED_FROM_INSTALL_IN:-}" ]; then
echo " --tarball-url-prefix URL: Base URL to download the Nix tarball from."
fi
) >&2
} >&2
# darwin and Catalina+
if [ "$(uname -s)" = "Darwin" ] && { [ "$macos_major" -gt 10 ] || { [ "$macos_major" -eq 10 ] && [ "$macos_minor" -gt 14 ]; }; }; then
(
echo " --darwin-use-unencrypted-nix-store-volume: Create an APFS volume for the Nix"
echo " store and mount it at /nix. This is the recommended way to create"
echo " /nix with a read-only / on macOS >=10.15."
echo " See: https://nixos.org/nix/manual/#sect-macos-installation"
echo ""
) >&2
fi
exit;;
esac
shift
done
if [ "$(uname -s)" = "Darwin" ]; then
if [ "$CREATE_DARWIN_VOLUME" = 1 ]; then
printf '\e[1;31mCreating volume and mountpoint /nix.\e[0m\n'
"$self/create-darwin-volume.sh"
fi
writable="$(diskutil info -plist / | xmllint --xpath "name(/plist/dict/key[text()='Writable']/following-sibling::*[1])" -)"
if ! [ -e $dest ] && [ "$writable" = "false" ]; then
(
echo ""
echo "Installing on macOS >=10.15 requires relocating the store to an apfs volume."
echo "Use sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume or run the preparation steps manually."
echo "See https://nixos.org/nix/manual/#sect-macos-installation"
echo ""
) >&2
exit 1
fi
fi
if [ "$INSTALL_MODE" = "daemon" ]; then
printf '\e[1;31mSwitching to the Multi-user Installer\e[0m\n'
exec "$self/install-multi-user"
exec "$self/install-multi-user" $ACTIONS # let ACTIONS split
exit 0
fi
@ -194,6 +180,7 @@ if ! "$nix/bin/nix-store" --load-db < "$self/.reginfo"; then
exit 1
fi
# shellcheck source=./nix-profile.sh.in
. "$nix/etc/profile.d/nix.sh"
if ! "$nix/bin/nix-env" -i "$nix"; then

25
scripts/install-systemd-multi-user.sh
View file

@ -41,10 +41,8 @@ handle_network_proxy() {
fi
}
poly_validate_assumptions() {
if [ "$(uname -s)" != "Linux" ]; then
failure "This script is for use with Linux!"
fi
poly_cure_artifacts() {
:
}
poly_service_installed_check() {
@ -72,7 +70,7 @@ poly_service_setup_note() {
EOF
}
poly_extra_try_me_commands(){
poly_extra_try_me_commands() {
if [ -e /run/systemd/system ]; then
:
else
@ -81,19 +79,10 @@ poly_extra_try_me_commands(){
EOF
fi
}
poly_extra_setup_instructions(){
if [ -e /run/systemd/system ]; then
:
else
cat <<EOF
Additionally, you may want to add nix-daemon to your init-system.
EOF
fi
}
poly_configure_nix_daemon_service() {
if [ -e /run/systemd/system ]; then
task "Setting up the nix-daemon systemd service"
_sudo "to set up the nix-daemon service" \
systemctl link "/nix/var/nix/profiles/default$SERVICE_SRC"
@ -110,6 +99,8 @@ poly_configure_nix_daemon_service() {
_sudo "to start the nix-daemon.service" \
systemctl restart nix-daemon.service
else
reminder "I don't support your init system yet; you may want to add nix-daemon manually."
fi
}
@ -207,3 +198,7 @@ poly_create_build_user() {
--password "!" \
"$username"
}
poly_prepare_to_install() {
:
}

12
scripts/install.in
View file

@ -46,15 +46,9 @@ case "$(uname -s).$(uname -m)" in
system=x86_64-darwin
;;
Darwin.arm64|Darwin.aarch64)
# check for Rosetta 2 support
if ! [ -f /Library/Apple/System/Library/LaunchDaemons/com.apple.oahd.plist ]; then
oops "Rosetta 2 is not installed on this ARM64 macOS machine. Run softwareupdate --install-rosetta then restart installation"
fi
hash=@binaryTarball_x86_64-darwin@
path=@tarballPath_x86_64-darwin@
# eventually maybe: aarch64-darwin
system=x86_64-darwin
hash=@binaryTarball_aarch64-darwin@
path=@tarballPath_aarch64-darwin@
system=aarch64-darwin
;;
*) oops "sorry, there is no binary distribution of Nix for your platform";;
esac

11
src/build-remote/build-remote.cc
View file

@ -277,7 +277,16 @@ connected:
auto drv = store->readDerivation(*drvPath);
auto outputHashes = staticOutputHashes(*store, drv);
drv.inputSrcs = store->parseStorePathSet(inputs);
// Hijack the inputs paths of the derivation to include all the paths
// that come from the `inputDrvs` set.
// We don’t do that for the derivations whose `inputDrvs` is empty
// because
// 1. It’s not needed
// 2. Changing the `inputSrcs` set changes the associated output ids,
// which break CA derivations
if (!drv.inputDrvs.empty())
drv.inputSrcs = store->parseStorePathSet(inputs);
auto result = sshStore->buildDerivation(*drvPath, drv);

47
src/libcmd/command.cc
View file

@ -54,7 +54,7 @@ void StoreCommand::run()
run(getStore());
}
RealisedPathsCommand::RealisedPathsCommand(bool recursive)
BuiltPathsCommand::BuiltPathsCommand(bool recursive)
: recursive(recursive)
{
if (recursive)
@ -81,39 +81,45 @@ RealisedPathsCommand::RealisedPathsCommand(bool recursive)
});
}
void RealisedPathsCommand::run(ref<Store> store)
void BuiltPathsCommand::run(ref<Store> store)
{
std::vector<RealisedPath> paths;
BuiltPaths paths;
if (all) {
if (installables.size())
throw UsageError("'--all' does not expect arguments");
// XXX: Only uses opaque paths, ignores all the realisations
for (auto & p : store->queryAllValidPaths())
paths.push_back(p);
paths.push_back(BuiltPath::Opaque{p});
} else {
auto pathSet = toRealisedPaths(store, realiseMode, operateOn, installables);
paths = toBuiltPaths(store, realiseMode, operateOn, installables);
if (recursive) {
auto roots = std::move(pathSet);
pathSet = {};
RealisedPath::closure(*store, roots, pathSet);
// XXX: This only computes the store path closure, ignoring
// intermediate realisations
StorePathSet pathsRoots, pathsClosure;
for (auto & root: paths) {
auto rootFromThis = root.outPaths();
pathsRoots.insert(rootFromThis.begin(), rootFromThis.end());
}
store->computeFSClosure(pathsRoots, pathsClosure);
for (auto & path : pathsClosure)
paths.push_back(BuiltPath::Opaque{path});
}
for (auto & path : pathSet)
paths.push_back(path);
}
run(store, std::move(paths));
}
StorePathsCommand::StorePathsCommand(bool recursive)
: RealisedPathsCommand(recursive)
: BuiltPathsCommand(recursive)
{
}
void StorePathsCommand::run(ref<Store> store, std::vector<RealisedPath> paths)
void StorePathsCommand::run(ref<Store> store, BuiltPaths paths)
{
StorePaths storePaths;
for (auto & p : paths)
storePaths.push_back(p.path());
for (auto& builtPath : paths)
for (auto& p : builtPath.outPaths())
storePaths.push_back(p);
run(store, std::move(storePaths));
}
@ -162,7 +168,7 @@ void MixProfile::updateProfile(const StorePath & storePath)
profile2, storePath));
}
void MixProfile::updateProfile(const Buildables & buildables)
void MixProfile::updateProfile(const BuiltPaths & buildables)
{
if (!profile) return;
@ -170,18 +176,15 @@ void MixProfile::updateProfile(const Buildables & buildables)
for (auto & buildable : buildables) {
std::visit(overloaded {
[&](BuildableOpaque bo) {
[&](BuiltPath::Opaque bo) {
result.push_back(bo.path);
},
[&](BuildableFromDrv bfd) {
[&](BuiltPath::Built bfd) {
for (auto & output : bfd.outputs) {
/* Output path should be known because we just tried to
build it. */
assert(output.second);
result.push_back(*output.second);
result.push_back(output.second);
}
},
}, buildable);
}, buildable.raw());
}
if (result.size() != 1)

18
src/libcmd/command.hh
View file

@ -143,7 +143,7 @@ private:
};
/* A command that operates on zero or more store paths. */
struct RealisedPathsCommand : public InstallablesCommand
struct BuiltPathsCommand : public InstallablesCommand
{
private:
@ -156,26 +156,26 @@ protected:
public:
RealisedPathsCommand(bool recursive = false);
BuiltPathsCommand(bool recursive = false);
using StoreCommand::run;
virtual void run(ref<Store> store, std::vector<RealisedPath> paths) = 0;
virtual void run(ref<Store> store, BuiltPaths paths) = 0;
void run(ref<Store> store) override;
bool useDefaultInstallables() override { return !all; }
};
struct StorePathsCommand : public RealisedPathsCommand
struct StorePathsCommand : public BuiltPathsCommand
{
StorePathsCommand(bool recursive = false);
using RealisedPathsCommand::run;
using BuiltPathsCommand::run;
virtual void run(ref<Store> store, std::vector<StorePath> storePaths) = 0;
void run(ref<Store> store, std::vector<RealisedPath> paths) override;
void run(ref<Store> store, BuiltPaths paths) override;
};
/* A command that operates on exactly one store path. */
@ -216,7 +216,7 @@ static RegisterCommand registerCommand2(std::vector<std::string> && name)
return RegisterCommand(std::move(name), [](){ return make_ref<T>(); });
}
Buildables build(ref<Store> store, Realise mode,
BuiltPaths build(ref<Store> store, Realise mode,
std::vector<std::shared_ptr<Installable>> installables, BuildMode bMode = bmNormal);
std::set<StorePath> toStorePaths(ref<Store> store,
@ -231,7 +231,7 @@ std::set<StorePath> toDerivations(ref<Store> store,
std::vector<std::shared_ptr<Installable>> installables,
bool useDeriver = false);
std::set<RealisedPath> toRealisedPaths(
BuiltPaths toBuiltPaths(
ref<Store> store,
Realise mode,
OperateOn operateOn,
@ -252,7 +252,7 @@ struct MixProfile : virtual StoreCommand
/* If 'profile' is set, make it point at the store path produced
by 'buildables'. */
void updateProfile(const Buildables & buildables);
void updateProfile(const BuiltPaths & buildables);
};
struct MixDefaultProfile : MixProfile

192
src/libcmd/installables.cc
View file

@ -20,31 +20,6 @@
namespace nix {
nlohmann::json BuildableOpaque::toJSON(ref<Store> store) const {
nlohmann::json res;
res["path"] = store->printStorePath(path);
return res;
}
nlohmann::json BuildableFromDrv::toJSON(ref<Store> store) const {
nlohmann::json res;
res["drvPath"] = store->printStorePath(drvPath);
for (const auto& [output, path] : outputs) {
res["outputs"][output] = path ? store->printStorePath(*path) : "";
}
return res;
}
nlohmann::json buildablesToJSON(const Buildables & buildables, ref<Store> store) {
auto res = nlohmann::json::array();
for (const Buildable & buildable : buildables) {
std::visit([&res, store](const auto & buildable) {
res.push_back(buildable.toJSON(store));
}, buildable);
}
return res;
}
void completeFlakeInputPath(
ref<EvalState> evalState,
const FlakeRef & flakeRef,
@ -111,10 +86,11 @@ MixFlakeOptions::MixFlakeOptions()
addFlag({
.longName = "override-input",
.description = "Override a specific flake input (e.g. `dwarffs/nixpkgs`).",
.description = "Override a specific flake input (e.g. `dwarffs/nixpkgs`). This implies `--no-write-lock-file`.",
.category = category,
.labels = {"input-path", "flake-url"},
.handler = {[&](std::string inputPath, std::string flakeRef) {
lockFlags.writeLockFile = false;
lockFlags.inputOverrides.insert_or_assign(
flake::parseInputPath(inputPath),
parseFlakeRef(flakeRef, absPath(".")));
@ -309,9 +285,9 @@ void completeFlakeRef(ref<Store> store, std::string_view prefix)
}
}
Buildable Installable::toBuildable()
DerivedPath Installable::toDerivedPath()
{
auto buildables = toBuildables();
auto buildables = toDerivedPaths();
if (buildables.size() != 1)
throw Error("installable '%s' evaluates to %d derivations, where only one is expected", what(), buildables.size());
return std::move(buildables[0]);
@ -345,22 +321,19 @@ struct InstallableStorePath : Installable
std::string what() override { return store->printStorePath(storePath); }
Buildables toBuildables() override
DerivedPaths toDerivedPaths() override
{
if (storePath.isDerivation()) {
std::map<std::string, std::optional<StorePath>> outputs;
auto drv = store->readDerivation(storePath);
for (auto & [name, output] : drv.outputsAndOptPaths(*store))
outputs.emplace(name, output.second);
return {
BuildableFromDrv {
DerivedPath::Built {
.drvPath = storePath,
.outputs = std::move(outputs)
.outputs = drv.outputNames(),
}
};
} else {
return {
BuildableOpaque {
DerivedPath::Opaque {
.path = storePath,
}
};
@ -373,22 +346,22 @@ struct InstallableStorePath : Installable
}
};
Buildables InstallableValue::toBuildables()
DerivedPaths InstallableValue::toDerivedPaths()
{
Buildables res;
DerivedPaths res;
std::map<StorePath, std::map<std::string, std::optional<StorePath>>> drvsToOutputs;
std::map<StorePath, std::set<std::string>> drvsToOutputs;
// Group by derivation, helps with .all in particular
for (auto & drv : toDerivations()) {
auto outputName = drv.outputName;
if (outputName == "")
throw Error("derivation '%s' lacks an 'outputName' attribute", state->store->printStorePath(drv.drvPath));
drvsToOutputs[drv.drvPath].insert_or_assign(outputName, drv.outPath);
drvsToOutputs[drv.drvPath].insert(outputName);
}
for (auto & i : drvsToOutputs)
res.push_back(BuildableFromDrv { i.first, i.second });
res.push_back(DerivedPath::Built { i.first, i.second });
return res;
}
@ -527,7 +500,11 @@ std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableF
auto root = cache->getRoot();
for (auto & attrPath : getActualAttrPaths()) {
auto attr = root->findAlongAttrPath(parseAttrPath(*state, attrPath));
auto attr = root->findAlongAttrPath(
parseAttrPath(*state, attrPath),
true
);
if (!attr) continue;
if (!attr->isDerivation())
@ -695,31 +672,67 @@ std::shared_ptr<Installable> SourceExprCommand::parseInstallable(
return installables.front();
}
Buildables build(ref<Store> store, Realise mode,
BuiltPaths getBuiltPaths(ref<Store> store, DerivedPaths hopefullyBuiltPaths)
{
BuiltPaths res;
for (auto& b : hopefullyBuiltPaths)
std::visit(
overloaded{
[&](DerivedPath::Opaque bo) {
res.push_back(BuiltPath::Opaque{bo.path});
},
[&](DerivedPath::Built bfd) {
OutputPathMap outputs;
auto drv = store->readDerivation(bfd.drvPath);
auto outputHashes = staticOutputHashes(*store, drv);
auto drvOutputs = drv.outputsAndOptPaths(*store);
for (auto& output : bfd.outputs) {
if (!outputHashes.count(output))
throw Error(
"the derivation '%s' doesn't have an output "
"named '%s'",
store->printStorePath(bfd.drvPath), output);
if (settings.isExperimentalFeatureEnabled(
"ca-derivations")) {
auto outputId =
DrvOutput{outputHashes.at(output), output};
auto realisation =
store->queryRealisation(outputId);
if (!realisation)
throw Error(
"cannot operate on an output of unbuilt "
"content-addresed derivation '%s'",
outputId.to_string());
outputs.insert_or_assign(
output, realisation->outPath);
} else {
// If ca-derivations isn't enabled, assume that
// the output path is statically known.
assert(drvOutputs.count(output));
assert(drvOutputs.at(output).second);
outputs.insert_or_assign(
output, *drvOutputs.at(output).second);
}
}
res.push_back(BuiltPath::Built{bfd.drvPath, outputs});
},
},
b.raw());
return res;
}
BuiltPaths build(ref<Store> store, Realise mode,
std::vector<std::shared_ptr<Installable>> installables, BuildMode bMode)
{
if (mode == Realise::Nothing)
settings.readOnlyMode = true;
Buildables buildables;
std::vector<StorePathWithOutputs> pathsToBuild;
std::vector<DerivedPath> pathsToBuild;
for (auto & i : installables) {
for (auto & b : i->toBuildables()) {
std::visit(overloaded {
[&](BuildableOpaque bo) {
pathsToBuild.push_back({bo.path});
},
[&](BuildableFromDrv bfd) {
StringSet outputNames;
for (auto & output : bfd.outputs)
outputNames.insert(output.first);
pathsToBuild.push_back({bfd.drvPath, outputNames});
},
}, b);
buildables.push_back(std::move(b));
}
auto b = i->toDerivedPaths();
pathsToBuild.insert(pathsToBuild.end(), b.begin(), b.end());
}
if (mode == Realise::Nothing)
@ -727,59 +740,26 @@ Buildables build(ref<Store> store, Realise mode,
else if (mode == Realise::Outputs)
store->buildPaths(pathsToBuild, bMode);
return buildables;
return getBuiltPaths(store, pathsToBuild);
}
std::set<RealisedPath> toRealisedPaths(
BuiltPaths toBuiltPaths(
ref<Store> store,
Realise mode,
OperateOn operateOn,
std::vector<std::shared_ptr<Installable>> installables)
{
std::set<RealisedPath> res;
if (operateOn == OperateOn::Output) {
for (auto & b : build(store, mode, installables))
std::visit(overloaded {
[&](BuildableOpaque bo) {
res.insert(bo.path);
},
[&](BuildableFromDrv bfd) {
auto drv = store->readDerivation(bfd.drvPath);
auto outputHashes = staticOutputHashes(*store, drv);
for (auto & output : bfd.outputs) {
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (!outputHashes.count(output.first))
throw Error(
"the derivation '%s' doesn't have an output named '%s'",
store->printStorePath(bfd.drvPath),
output.first);
auto outputId = DrvOutput{outputHashes.at(output.first), output.first};
auto realisation = store->queryRealisation(outputId);
if (!realisation)
throw Error("cannot operate on an output of unbuilt content-addresed derivation '%s'", outputId.to_string());
res.insert(RealisedPath{*realisation});
}
else {
// If ca-derivations isn't enabled, behave as if
// all the paths are opaque to keep the default
// behavior
assert(output.second);
res.insert(*output.second);
}
}
},
}, b);
return build(store, mode, installables);
} else {
if (mode == Realise::Nothing)
settings.readOnlyMode = true;
for (auto & i : installables)
for (auto & b : i->toBuildables())
if (auto bfd = std::get_if<BuildableFromDrv>(&b))
res.insert(bfd->drvPath);
BuiltPaths res;
for (auto & drvPath : toDerivations(store, installables, true))
res.push_back(BuiltPath::Opaque{drvPath});
return res;
}
return res;
}
StorePathSet toStorePaths(ref<Store> store,
@ -787,8 +767,10 @@ StorePathSet toStorePaths(ref<Store> store,
std::vector<std::shared_ptr<Installable>> installables)
{
StorePathSet outPaths;
for (auto & path : toRealisedPaths(store, mode, operateOn, installables))
outPaths.insert(path.path());
for (auto & path : toBuiltPaths(store, mode, operateOn, installables)) {
auto thisOutPaths = path.outPaths();
outPaths.insert(thisOutPaths.begin(), thisOutPaths.end());
}
return outPaths;
}
@ -810,9 +792,9 @@ StorePathSet toDerivations(ref<Store> store,
StorePathSet drvPaths;
for (auto & i : installables)
for (auto & b : i->toBuildables())
for (auto & b : i->toDerivedPaths())
std::visit(overloaded {
[&](BuildableOpaque bo) {
[&](DerivedPath::Opaque bo) {
if (!useDeriver)
throw Error("argument '%s' did not evaluate to a derivation", i->what());
auto derivers = store->queryValidDerivers(bo.path);
@ -821,10 +803,10 @@ StorePathSet toDerivations(ref<Store> store,
// FIXME: use all derivers?
drvPaths.insert(*derivers.begin());
},
[&](BuildableFromDrv bfd) {
[&](DerivedPath::Built bfd) {
drvPaths.insert(bfd.drvPath);
},
}, b);
}, b.raw());
return drvPaths;
}

37
src/libcmd/installables.hh
View file

@ -2,13 +2,13 @@
#include "util.hh"
#include "path.hh"
#include "path-with-outputs.hh"
#include "derived-path.hh"
#include "eval.hh"
#include "flake/flake.hh"
#include <optional>
#include <nlohmann/json_fwd.hpp>
namespace nix {
struct DrvInfo;
@ -16,25 +16,6 @@ struct SourceExprCommand;
namespace eval_cache { class EvalCache; class AttrCursor; }
struct BuildableOpaque {
StorePath path;
nlohmann::json toJSON(ref<Store> store) const;
};
struct BuildableFromDrv {
StorePath drvPath;
std::map<std::string, std::optional<StorePath>> outputs;
nlohmann::json toJSON(ref<Store> store) const;
};
typedef std::variant<
BuildableOpaque,
BuildableFromDrv
> Buildable;
typedef std::vector<Buildable> Buildables;
nlohmann::json buildablesToJSON(const Buildables & buildables, ref<Store> store);
struct App
{
std::vector<StorePathWithOutputs> context;
@ -42,17 +23,23 @@ struct App
// FIXME: add args, sandbox settings, metadata, ...
};
struct UnresolvedApp
{
App unresolved;
App resolve(ref<Store>);
};
struct Installable
{
virtual ~Installable() { }
virtual std::string what() = 0;
virtual Buildables toBuildables() = 0;
virtual DerivedPaths toDerivedPaths() = 0;
Buildable toBuildable();
DerivedPath toDerivedPath();
App toApp(EvalState & state);
UnresolvedApp toApp(EvalState & state);
virtual std::pair<Value *, Pos> toValue(EvalState & state)
{
@ -93,7 +80,7 @@ struct InstallableValue : Installable
virtual std::vector<DerivationInfo> toDerivations() = 0;
Buildables toBuildables() override;
DerivedPaths toDerivedPaths() override;
};
struct InstallableFlake : InstallableValue

1
src/libexpr/attr-set.hh
View file

@ -35,6 +35,7 @@ class Bindings
{
public:
typedef uint32_t size_t;
Pos *pos;
private:
size_t size_, capacity_;

4
src/libexpr/eval-cache.cc
View file

@ -486,11 +486,11 @@ 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)
std::shared_ptr<AttrCursor> AttrCursor::findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force)
{
auto res = shared_from_this();
for (auto & attr : attrPath) {
res = res->maybeGetAttr(attr);
res = res->maybeGetAttr(attr, force);
if (!res) return {};
}
return res;

2
src/libexpr/eval-cache.hh
View file

@ -102,7 +102,7 @@ public:
std::shared_ptr<AttrCursor> getAttr(std::string_view name);
std::shared_ptr<AttrCursor> findAlongAttrPath(const std::vector<Symbol> & attrPath);
std::shared_ptr<AttrCursor> findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force = false);
std::string getString();

20
src/libexpr/eval.cc
View file

@ -201,6 +201,15 @@ string showType(const Value & v)
}
}
Pos Value::determinePos(const Pos &pos) const
{
switch (internalType) {
case tAttrs: return *attrs->pos;
case tLambda: return lambda.fun->pos;
case tApp: return app.left->determinePos(pos);
default: return pos;
}
}
bool Value::isTrivial() const
{
@ -1060,6 +1069,8 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
v.attrs->push_back(Attr(nameSym, i.valueExpr->maybeThunk(state, *dynamicEnv), &i.pos));
v.attrs->sort(); // FIXME: inefficient
}
v.attrs->pos = &pos;
}
@ -2091,9 +2102,12 @@ Strings EvalSettings::getDefaultNixPath()
}
};
add(getHome() + "/.nix-defexpr/channels");
add(settings.nixStateDir + "/profiles/per-user/root/channels/nixpkgs", "nixpkgs");
add(settings.nixStateDir + "/profiles/per-user/root/channels");
if (!evalSettings.restrictEval && !evalSettings.pureEval) {
add(getHome() + "/.nix-defexpr/channels");
add(settings.nixStateDir + "/profiles/per-user/root/channels/nixpkgs", "nixpkgs");
add(settings.nixStateDir + "/profiles/per-user/root/channels");
}
return res;
}

4
src/libexpr/flake/config.cc
View file

@ -22,7 +22,9 @@ static TrustedList readTrustedList()
static void writeTrustedList(const TrustedList & trustedList)
{
writeFile(trustedListPath(), nlohmann::json(trustedList).dump());
auto path = trustedListPath();
createDirs(dirOf(path));
writeFile(path, nlohmann::json(trustedList).dump());
}
void ConfigFile::apply()

2
src/libexpr/flake/flake.hh
View file

@ -113,7 +113,7 @@ struct LockFlags
/* Whether to commit changes to flake.lock. */
bool commitLockFile = false;
/* Flake inputs to be overriden. */
/* Flake inputs to be overridden. */
std::map<InputPath, FlakeRef> inputOverrides;
/* Flake inputs to be updated. This means that any existing lock

3
src/libexpr/get-drvs.cc
View file

@ -2,6 +2,7 @@
#include "util.hh"
#include "eval-inline.hh"
#include "store-api.hh"
#include "path-with-outputs.hh"
#include <cstring>
#include <regex>
@ -19,7 +20,7 @@ DrvInfo::DrvInfo(EvalState & state, const string & attrPath, Bindings * attrs)
DrvInfo::DrvInfo(EvalState & state, ref<Store> store, const std::string & drvPathWithOutputs)
: state(&state), attrs(nullptr), attrPath("")
{
auto [drvPath, selectedOutputs] = store->parsePathWithOutputs(drvPathWithOutputs);
auto [drvPath, selectedOutputs] = parsePathWithOutputs(*store, drvPathWithOutputs);
this->drvPath = store->printStorePath(drvPath);

2
src/libexpr/local.mk
View file

@ -16,7 +16,7 @@ libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libfetchers -I src/lib
libexpr_LIBS = libutil libstore libfetchers
libexpr_LDFLAGS = -lboost_context
ifneq ($(OS), FreeBSD)
ifeq ($(OS), Linux)
libexpr_LDFLAGS += -ldl
endif

4
src/libexpr/nixexpr.hh
View file

@ -180,6 +180,7 @@ struct ExprOpHasAttr : Expr
struct ExprAttrs : Expr
{
bool recursive;
Pos pos;
struct AttrDef {
bool inherited;
Expr * e;
@ -199,7 +200,8 @@ struct ExprAttrs : Expr
};
typedef std::vector<DynamicAttrDef> DynamicAttrDefs;
DynamicAttrDefs dynamicAttrs;
ExprAttrs() : recursive(false) { };
ExprAttrs(const Pos &pos) : recursive(false), pos(pos) { };
ExprAttrs() : recursive(false), pos(noPos) { };
COMMON_METHODS
};

2
src/libexpr/parser.y
View file

@ -478,7 +478,7 @@ binds
$$->attrs[i.symbol] = ExprAttrs::AttrDef(new ExprSelect(CUR_POS, $4, i.symbol), makeCurPos(@6, data));
}
}
| { $$ = new ExprAttrs; }
| { $$ = new ExprAttrs(makeCurPos(@0, data)); }
;
attrs

212
src/libexpr/primops.cc
View file

@ -21,6 +21,8 @@
#include <regex>
#include <dlfcn.h>
#include <cmath>
namespace nix {
@ -35,7 +37,7 @@ InvalidPathError::InvalidPathError(const Path & path) :
void EvalState::realiseContext(const PathSet & context)
{
std::vector<StorePathWithOutputs> drvs;
std::vector<DerivedPath::Built> drvs;
for (auto & i : context) {
auto [ctxS, outputName] = decodeContext(i);
@ -43,7 +45,7 @@ void EvalState::realiseContext(const PathSet & context)
if (!store->isValidPath(ctx))
throw InvalidPathError(store->printStorePath(ctx));
if (!outputName.empty() && ctx.isDerivation()) {
drvs.push_back(StorePathWithOutputs{ctx, {outputName}});
drvs.push_back({ctx, {outputName}});
}
}
@ -51,14 +53,16 @@ void EvalState::realiseContext(const PathSet & context)
if (!evalSettings.enableImportFromDerivation)
throw EvalError("attempted to realize '%1%' during evaluation but 'allow-import-from-derivation' is false",
store->printStorePath(drvs.begin()->path));
store->printStorePath(drvs.begin()->drvPath));
/* For performance, prefetch all substitute info. */
StorePathSet willBuild, willSubstitute, unknown;
uint64_t downloadSize, narSize;
store->queryMissing(drvs, willBuild, willSubstitute, unknown, downloadSize, narSize);
std::vector<DerivedPath> buildReqs;
for (auto & d : drvs) buildReqs.emplace_back(DerivedPath { d });
store->queryMissing(buildReqs, willBuild, willSubstitute, unknown, downloadSize, narSize);
store->buildPaths(drvs);
store->buildPaths(buildReqs);
/* Add the output of this derivations to the allowed
paths. */
@ -545,18 +549,56 @@ typedef list<Value *> ValueList;
#endif
static Bindings::iterator getAttr(
EvalState & state,
string funcName,
string attrName,
Bindings * attrSet,
const Pos & pos)
{
Bindings::iterator value = attrSet->find(state.symbols.create(attrName));
if (value == attrSet->end()) {
hintformat errorMsg = hintfmt(
"attribute '%s' missing for call to '%s'",
attrName,
funcName
);
Pos aPos = *attrSet->pos;
if (aPos == noPos) {
throw TypeError({
.msg = errorMsg,
.errPos = pos,
});
} else {
auto e = TypeError({
.msg = errorMsg,
.errPos = aPos,
});
// Adding another trace for the function name to make it clear
// which call received wrong arguments.
e.addTrace(pos, hintfmt("while invoking '%s'", funcName));
throw e;
}
}
return value;
}
static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceAttrs(*args[0], pos);
/* Get the start set. */
Bindings::iterator startSet =
args[0]->attrs->find(state.symbols.create("startSet"));
if (startSet == args[0]->attrs->end())
throw EvalError({
.msg = hintfmt("attribute 'startSet' required"),
.errPos = pos
});
Bindings::iterator startSet = getAttr(
state,
"genericClosure",
"startSet",
args[0]->attrs,
pos
);
state.forceList(*startSet->value, pos);
ValueList workSet;
@ -564,13 +606,14 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
workSet.push_back(startSet->value->listElems()[n]);
/* Get the operator. */
Bindings::iterator op =
args[0]->attrs->find(state.symbols.create("operator"));
if (op == args[0]->attrs->end())
throw EvalError({
.msg = hintfmt("attribute 'operator' required"),
.errPos = pos
});
Bindings::iterator op = getAttr(
state,
"genericClosure",
"operator",
args[0]->attrs,
pos
);
state.forceValue(*op->value, pos);
/* Construct the closure by applying the operator to element of
@ -673,6 +716,44 @@ static RegisterPrimOp primop_addErrorContext(RegisterPrimOp::Info {
.fun = prim_addErrorContext,
});
static void prim_ceil(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto value = state.forceFloat(*args[0], args[0]->determinePos(pos));
mkInt(v, ceil(value));
}
static RegisterPrimOp primop_ceil({
.name = "__ceil",
.args = {"double"},
.doc = R"(
Converts an IEEE-754 double-precision floating-point number (*double*) to
the next higher integer.
If the datatype is neither an integer nor a "float", an evaluation error will be
thrown.
)",
.fun = prim_ceil,
});
static void prim_floor(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto value = state.forceFloat(*args[0], args[0]->determinePos(pos));
mkInt(v, floor(value));
}
static RegisterPrimOp primop_floor({
.name = "__floor",
.args = {"double"},
.doc = R"(
Converts an IEEE-754 double-precision floating-point number (*double*) to
the next lower integer.
If the datatype is neither an integer nor a "float", an evaluation error will be
thrown.
)",
.fun = prim_floor,
});
/* Try evaluating the argument. Success => {success=true; value=something;},
* else => {success=false; value=false;} */
static void prim_tryEval(EvalState & state, const Pos & pos, Value * * args, Value & v)
@ -814,12 +895,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
state.forceAttrs(*args[0], pos);
/* Figure out the name first (for stack backtraces). */
Bindings::iterator attr = args[0]->attrs->find(state.sName);
if (attr == args[0]->attrs->end())
throw EvalError({
.msg = hintfmt("required attribute 'name' missing"),
.errPos = pos
});
Bindings::iterator attr = getAttr(
state,
"derivationStrict",
state.sName,
args[0]->attrs,
pos
);
string drvName;
Pos & posDrvName(*attr->pos);
try {
@ -951,7 +1034,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
}
} else {
auto s = state.coerceToString(posDrvName, *i->value, context, true);
auto s = state.coerceToString(*i->pos, *i->value, context, true);
drv.env.emplace(key, s);
if (i->name == state.sBuilder) drv.builder = s;
else if (i->name == state.sSystem) drv.platform = s;
@ -1208,7 +1291,10 @@ static RegisterPrimOp primop_toPath({
static void prim_storePath(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
if (evalSettings.pureEval)
throw EvalError("builtins.storePath' is not allowed in pure evaluation mode");
throw EvalError({
.msg = hintfmt("'%s' is not allowed in pure evaluation mode", "builtins.storePath"),
.errPos = pos
});
PathSet context;
Path path = state.checkSourcePath(state.coerceToPath(pos, *args[0], context));
@ -1367,12 +1453,13 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
if (i != v2.attrs->end())
prefix = state.forceStringNoCtx(*i->value, pos);
i = v2.attrs->find(state.symbols.create("path"));
if (i == v2.attrs->end())
throw EvalError({
.msg = hintfmt("attribute 'path' missing"),
.errPos = pos
});
i = getAttr(
state,
"findFile",
"path",
v2.attrs,
pos
);
PathSet context;
string path = state.coerceToString(pos, *i->value, context, false, false);
@ -1918,26 +2005,26 @@ static RegisterPrimOp primop_path({
An enrichment of the built-in path type, based on the attributes
present in *args*. All are optional except `path`:
- path
- path\
The underlying path.
- name
- name\
The name of the path when added to the store. This can used to
reference paths that have nix-illegal characters in their names,
like `@`.
- filter
- filter\
A function of the type expected by `builtins.filterSource`,
with the same semantics.
- recursive
- recursive\
When `false`, when `path` is added to the store it is with a
flat hash, rather than a hash of the NAR serialization of the
file. Thus, `path` must refer to a regular file, not a
directory. This allows similar behavior to `fetchurl`. Defaults
to `true`.
- sha256
- sha256\
When provided, this is the expected hash of the file at the
path. Evaluation will fail if the hash is incorrect, and
providing a hash allows `builtins.path` to be used even when the
@ -2014,12 +2101,13 @@ void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
string attr = state.forceStringNoCtx(*args[0], pos);
state.forceAttrs(*args[1], pos);
// !!! Should we create a symbol here or just do a lookup?
Bindings::iterator i = args[1]->attrs->find(state.symbols.create(attr));
if (i == args[1]->attrs->end())
throw EvalError({
.msg = hintfmt("attribute '%1%' missing", attr),
.errPos = pos
});
Bindings::iterator i = getAttr(
state,
"getAttr",
attr,
args[1]->attrs,
pos
);
// !!! add to stack trace?
if (state.countCalls && i->pos) state.attrSelects[*i->pos]++;
state.forceValue(*i->value, pos);
@ -2146,22 +2234,25 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
Value & v2(*args[0]->listElems()[i]);
state.forceAttrs(v2, pos);
Bindings::iterator j = v2.attrs->find(state.sName);
if (j == v2.attrs->end())
throw TypeError({
.msg = hintfmt("'name' attribute missing in a call to 'listToAttrs'"),
.errPos = pos
});
string name = state.forceStringNoCtx(*j->value, pos);
Bindings::iterator j = getAttr(
state,
"listToAttrs",
state.sName,
v2.attrs,
pos
);
string name = state.forceStringNoCtx(*j->value, *j->pos);
Symbol sym = state.symbols.create(name);
if (seen.insert(sym).second) {
Bindings::iterator j2 = v2.attrs->find(state.symbols.create(state.sValue));
if (j2 == v2.attrs->end())
throw TypeError({
.msg = hintfmt("'value' attribute missing in a call to 'listToAttrs'"),
.errPos = pos
});
Bindings::iterator j2 = getAttr(
state,
"listToAttrs",
state.sValue,
v2.attrs,
pos
);
v.attrs->push_back(Attr(sym, j2->value, j2->pos));
}
}
@ -2802,7 +2893,12 @@ static void prim_concatMap(EvalState & state, const Pos & pos, Value * * args, V
for (unsigned int n = 0; n < nrLists; ++n) {
Value * vElem = args[1]->listElems()[n];
state.callFunction(*args[0], *vElem, lists[n], pos);
state.forceList(lists[n], pos);
try {
state.forceList(lists[n], lists[n].determinePos(args[0]->determinePos(pos)));
} catch (TypeError &e) {
e.addTrace(pos, hintfmt("while invoking '%s'", "concatMap"));
throw e;
}
len += lists[n].listSize();
}

12
src/libexpr/primops/fetchTree.cc
View file

@ -303,17 +303,17 @@ static RegisterPrimOp primop_fetchGit({
of the repo at that URL is fetched. Otherwise, it can be an
attribute with the following attributes (all except `url` optional):
- url
- url\
The URL of the repo.
- name
- name\
The name of the directory the repo should be exported to in the
store. Defaults to the basename of the URL.
- rev
- rev\
The git revision to fetch. Defaults to the tip of `ref`.
- ref
- ref\
The git ref to look for the requested revision under. This is
often a branch or tag name. Defaults to `HEAD`.
@ -321,11 +321,11 @@ static RegisterPrimOp primop_fetchGit({
of Nix 2.3.0 Nix will not prefix `refs/heads/` if `ref` starts
with `refs/`.
- submodules
- submodules\
A Boolean parameter that specifies whether submodules should be
checked out. Defaults to `false`.
- allRefs
- allRefs\
Whether to fetch all refs of the repository. With this argument being
true, it's possible to load a `rev` from *any* `ref` (by default only
`rev`s from the specified `ref` are supported).

2
src/libexpr/value.hh
View file

@ -341,6 +341,8 @@ public:
return internalType == tList1 ? 1 : internalType == tList2 ? 2 : bigList.size;
}
Pos determinePos(const Pos &pos) const;
/* Check whether forcing this value requires a trivial amount of
computation. In particular, function applications are
non-trivial. */

2
src/libfetchers/attrs.hh
View file

@ -6,6 +6,8 @@
#include <nlohmann/json_fwd.hpp>
#include <optional>
namespace nix::fetchers {
typedef std::variant<std::string, uint64_t, Explicit<bool>> Attr;

8
src/libfetchers/fetchers.hh
View file

@ -145,13 +145,7 @@ DownloadFileResult downloadFile(
bool immutable,
const Headers & headers = {});
struct DownloadTarballMeta
{
time_t lastModified;
std::string effectiveUrl;
};
std::pair<Tree, DownloadTarballMeta> downloadTarball(
std::pair<Tree, time_t> downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,

15
src/libfetchers/git.cc
View file

@ -6,6 +6,7 @@
#include "url-parts.hh"
#include <sys/time.h>
#include <sys/wait.h>
using namespace std::string_literals;
@ -153,12 +154,14 @@ struct GitInputScheme : InputScheme
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).
// file:// URIs are normally not cloned (but otherwise treated the
// same as remote URIs, i.e. we don't use the working tree or
// HEAD). Exception: If _NIX_FORCE_HTTP is set, or the repo is a bare git
// repo, treat as a remote URI to force a clone.
static bool forceHttp = getEnv("_NIX_FORCE_HTTP") == "1"; // for testing
auto url = parseURL(getStrAttr(input.attrs, "url"));
bool isLocal = url.scheme == "file" && !forceHttp;
bool isBareRepository = url.scheme == "file" && !pathExists(url.path + "/.git");
bool isLocal = url.scheme == "file" && !forceHttp && !isBareRepository;
return {isLocal, isLocal ? url.path : url.base};
}
@ -363,7 +366,9 @@ struct GitInputScheme : InputScheme
? "refs/*"
: ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
: ref == "HEAD"
? *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;

6
src/libfetchers/github.cc
View file

@ -207,16 +207,16 @@ struct GitArchiveInputScheme : InputScheme
auto url = getDownloadUrl(input);
auto [tree, meta] = downloadTarball(store, url.url, "source", true, url.headers);
auto [tree, lastModified] = downloadTarball(store, url.url, "source", true, url.headers);
input.attrs.insert_or_assign("lastModified", uint64_t(meta.lastModified));
input.attrs.insert_or_assign("lastModified", uint64_t(lastModified));
getCache()->add(
store,
immutableAttrs,
{
{"rev", rev->gitRev()},
{"lastModified", uint64_t(meta.lastModified)}
{"lastModified", uint64_t(lastModified)}
},
tree.storePath,
true);

2
src/libfetchers/registry.cc
View file

@ -114,7 +114,7 @@ static std::shared_ptr<Registry> getSystemRegistry()
Path getUserRegistryPath()
{
return getHome() + "/.config/nix/registry.json";
return getConfigDir() + "/nix/registry.json";
}
std::shared_ptr<Registry> getUserRegistry()

22
src/libfetchers/tarball.cc
View file

@ -109,7 +109,7 @@ DownloadFileResult downloadFile(
};
}
std::pair<Tree, DownloadTarballMeta> downloadTarball(
std::pair<Tree, time_t> downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,
@ -127,10 +127,7 @@ std::pair<Tree, DownloadTarballMeta> downloadTarball(
if (cached && !cached->expired)
return {
Tree(store->toRealPath(cached->storePath), std::move(cached->storePath)),
{
.lastModified = time_t(getIntAttr(cached->infoAttrs, "lastModified")),
.effectiveUrl = maybeGetStrAttr(cached->infoAttrs, "effectiveUrl").value_or(url),
},
getIntAttr(cached->infoAttrs, "lastModified")
};
auto res = downloadFile(store, url, name, immutable, headers);
@ -155,7 +152,6 @@ std::pair<Tree, DownloadTarballMeta> downloadTarball(
Attrs infoAttrs({
{"lastModified", uint64_t(lastModified)},
{"effectiveUrl", res.effectiveUrl},
{"etag", res.etag},
});
@ -168,10 +164,7 @@ std::pair<Tree, DownloadTarballMeta> downloadTarball(
return {
Tree(store->toRealPath(*unpackedStorePath), std::move(*unpackedStorePath)),
{
.lastModified = lastModified,
.effectiveUrl = res.effectiveUrl,
},
lastModified,
};
}
@ -185,7 +178,8 @@ struct TarballInputScheme : InputScheme
&& !hasSuffix(url.path, ".tar")
&& !hasSuffix(url.path, ".tar.gz")
&& !hasSuffix(url.path, ".tar.xz")
&& !hasSuffix(url.path, ".tar.bz2"))
&& !hasSuffix(url.path, ".tar.bz2")
&& !hasSuffix(url.path, ".tar.zst"))
return {};
Input input;
@ -230,11 +224,9 @@ struct TarballInputScheme : InputScheme
return true;
}
std::pair<Tree, Input> fetch(ref<Store> store, const Input & _input) override
std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) override
{
Input input(_input);
auto [tree, meta] = downloadTarball(store, getStrAttr(input.attrs, "url"), "source", false);
input.attrs.insert_or_assign("url", meta.effectiveUrl);
auto tree = downloadTarball(store, getStrAttr(input.attrs, "url"), "source", false).first;
return {std::move(tree), input};
}
};

1
src/libmain/progress-bar.cc
View file

@ -122,6 +122,7 @@ public:
void log(Verbosity lvl, const FormatOrString & fs) override
{
if (lvl > verbosity) return;
auto state(state_.lock());
log(*state, lvl, fs.s);
}

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)
void printMissing(ref<Store> store, const std::vector<DerivedPath> & paths, Verbosity lvl)
{
uint64_t downloadSize, narSize;
StorePathSet willBuild, willSubstitute, unknown;
@ -310,7 +310,7 @@ void printVersion(const string & programName)
void showManPage(const string & name)
{
restoreSignals();
restoreProcessContext();
setenv("MANPATH", settings.nixManDir.c_str(), 1);
execlp("man", "man", name.c_str(), nullptr);
throw SysError("command 'man %1%' failed", name.c_str());
@ -373,7 +373,7 @@ RunPager::RunPager()
throw SysError("dupping stdin");
if (!getenv("LESS"))
setenv("LESS", "FRSXMK", 1);
restoreSignals();
restoreProcessContext();
if (pager)
execl("/bin/sh", "sh", "-c", pager, nullptr);
execlp("pager", "pager", nullptr);

3
src/libmain/shared.hh
View file

@ -4,6 +4,7 @@
#include "args.hh"
#include "common-args.hh"
#include "path.hh"
#include "derived-path.hh"
#include <signal.h>
@ -42,7 +43,7 @@ struct StorePathWithOutputs;
void printMissing(
ref<Store> store,
const std::vector<StorePathWithOutputs> & paths,
const std::vector<DerivedPath> & paths,
Verbosity lvl = lvlInfo);
void printMissing(ref<Store> store, const StorePathSet & willBuild,

32
src/libstore/binary-cache-store.cc
View file

@ -179,6 +179,9 @@ ref<const ValidPathInfo> BinaryCacheStore::addToStoreCommon(
narInfo->url = "nar/" + narInfo->fileHash->to_string(Base32, false) + ".nar"
+ (compression == "xz" ? ".xz" :
compression == "bzip2" ? ".bz2" :
compression == "zstd" ? ".zst" :
compression == "lzip" ? ".lzip" :
compression == "lz4" ? ".lz4" :
compression == "br" ? ".br" :
"");
@ -447,18 +450,43 @@ StorePath BinaryCacheStore::addTextToStore(const string & name, const string & s
std::optional<const Realisation> BinaryCacheStore::queryRealisation(const DrvOutput & id)
{
if (diskCache) {
auto [cacheOutcome, maybeCachedRealisation] =
diskCache->lookupRealisation(getUri(), id);
switch (cacheOutcome) {
case NarInfoDiskCache::oValid:
debug("Returning a cached realisation for %s", id.to_string());
return *maybeCachedRealisation;
case NarInfoDiskCache::oInvalid:
debug("Returning a cached missing realisation for %s", id.to_string());
return {};
case NarInfoDiskCache::oUnknown:
break;
}
}
auto outputInfoFilePath = realisationsPrefix + "/" + id.to_string() + ".doi";
auto rawOutputInfo = getFile(outputInfoFilePath);
if (rawOutputInfo) {
return {Realisation::fromJSON(
nlohmann::json::parse(*rawOutputInfo), outputInfoFilePath)};
auto realisation = Realisation::fromJSON(
nlohmann::json::parse(*rawOutputInfo), outputInfoFilePath);
if (diskCache)
diskCache->upsertRealisation(
getUri(), realisation);
return {realisation};
} else {
if (diskCache)
diskCache->upsertAbsentRealisation(getUri(), id);
return std::nullopt;
}
}
void BinaryCacheStore::registerDrvOutput(const Realisation& info) {
if (diskCache)
diskCache->upsertRealisation(getUri(), info);
auto filePath = realisationsPrefix + "/" + info.id.to_string() + ".doi";
upsertFile(filePath, info.toJSON().dump(), "application/json");
}

2
src/libstore/binary-cache-store.hh
View file

@ -34,7 +34,7 @@ private:
protected:
// The prefix under which realisation infos will be stored
const std::string realisationsPrefix = "/realisations";
const std::string realisationsPrefix = "realisations";
BinaryCacheStore(const Params & params);

64
src/libstore/build/derivation-goal.cc
View file

@ -20,6 +20,7 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <netdb.h>
#include <fcntl.h>
#include <termios.h>
@ -73,7 +74,7 @@ DerivationGoal::DerivationGoal(const StorePath & drvPath,
state = &DerivationGoal::getDerivation;
name = fmt(
"building of '%s' from .drv file",
StorePathWithOutputs { drvPath, wantedOutputs }.to_string(worker.store));
DerivedPath::Built { drvPath, wantedOutputs }.to_string(worker.store));
trace("created");
mcExpectedBuilds = std::make_unique<MaintainCount<uint64_t>>(worker.expectedBuilds);
@ -94,7 +95,7 @@ DerivationGoal::DerivationGoal(const StorePath & drvPath, const BasicDerivation
state = &DerivationGoal::haveDerivation;
name = fmt(
"building of '%s' from in-memory derivation",
StorePathWithOutputs { drvPath, drv.outputNames() }.to_string(worker.store));
DerivedPath::Built { drvPath, drv.outputNames() }.to_string(worker.store));
trace("created");
mcExpectedBuilds = std::make_unique<MaintainCount<uint64_t>>(worker.expectedBuilds);
@ -170,7 +171,7 @@ void DerivationGoal::getDerivation()
return;
}
addWaitee(upcast_goal(worker.makeSubstitutionGoal(drvPath)));
addWaitee(upcast_goal(worker.makePathSubstitutionGoal(drvPath)));
state = &DerivationGoal::loadDerivation;
}
@ -246,17 +247,22 @@ void DerivationGoal::haveDerivation()
through substitutes. If that doesn't work, we'll build
them. */
if (settings.useSubstitutes && parsedDrv->substitutesAllowed())
for (auto & [_, status] : initialOutputs) {
for (auto & [outputName, status] : initialOutputs) {
if (!status.wanted) continue;
if (!status.known) {
warn("do not know how to query for unknown floating content-addressed derivation output yet");
/* Nothing to wait for; tail call */
return DerivationGoal::gaveUpOnSubstitution();
}
addWaitee(upcast_goal(worker.makeSubstitutionGoal(
status.known->path,
buildMode == bmRepair ? Repair : NoRepair,
getDerivationCA(*drv))));
if (!status.known)
addWaitee(
upcast_goal(
worker.makeDrvOutputSubstitutionGoal(
DrvOutput{status.outputHash, outputName},
buildMode == bmRepair ? Repair : NoRepair
)
)
);
else
addWaitee(upcast_goal(worker.makePathSubstitutionGoal(
status.known->path,
buildMode == bmRepair ? Repair : NoRepair,
getDerivationCA(*drv))));
}
if (waitees.empty()) /* to prevent hang (no wake-up event) */
@ -337,7 +343,7 @@ void DerivationGoal::gaveUpOnSubstitution()
if (!settings.useSubstitutes)
throw Error("dependency '%s' of '%s' does not exist, and substitution is disabled",
worker.store.printStorePath(i), worker.store.printStorePath(drvPath));
addWaitee(upcast_goal(worker.makeSubstitutionGoal(i)));
addWaitee(upcast_goal(worker.makePathSubstitutionGoal(i)));
}
if (waitees.empty()) /* to prevent hang (no wake-up event) */
@ -388,7 +394,7 @@ void DerivationGoal::repairClosure()
worker.store.printStorePath(i), worker.store.printStorePath(drvPath));
auto drvPath2 = outputsToDrv.find(i);
if (drvPath2 == outputsToDrv.end())
addWaitee(upcast_goal(worker.makeSubstitutionGoal(i, Repair)));
addWaitee(upcast_goal(worker.makePathSubstitutionGoal(i, Repair)));
else
addWaitee(worker.makeDerivationGoal(drvPath2->second, StringSet(), bmRepair));
}
@ -920,6 +926,9 @@ void DerivationGoal::resolvedFinished() {
if (realisation) {
auto newRealisation = *realisation;
newRealisation.id = DrvOutput{initialOutputs.at(wantedOutput).outputHash, wantedOutput};
newRealisation.signatures.clear();
newRealisation.dependentRealisations = drvOutputReferences(worker.store, *drv, realisation->outPath);
signRealisation(newRealisation);
worker.store.registerDrvOutput(newRealisation);
} else {
// If we don't have a realisation, then it must mean that something
@ -1243,9 +1252,12 @@ OutputPathMap DerivationGoal::queryDerivationOutputMap()
void DerivationGoal::checkPathValidity()
{
bool checkHash = buildMode == bmRepair;
auto wantedOutputsLeft = wantedOutputs;
for (auto & i : queryPartialDerivationOutputMap()) {
InitialOutput & info = initialOutputs.at(i.first);
info.wanted = wantOutput(i.first, wantedOutputs);
if (info.wanted)
wantedOutputsLeft.erase(i.first);
if (i.second) {
auto outputPath = *i.second;
info.known = {
@ -1258,15 +1270,33 @@ void DerivationGoal::checkPathValidity()
};
}
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (auto real = worker.store.queryRealisation(
DrvOutput{initialOutputs.at(i.first).outputHash, i.first})) {
auto drvOutput = DrvOutput{initialOutputs.at(i.first).outputHash, i.first};
if (auto real = worker.store.queryRealisation(drvOutput)) {
info.known = {
.path = real->outPath,
.status = PathStatus::Valid,
};
} else if (info.known && info.known->status == PathStatus::Valid) {
// We know the output because it' a static output of the
// derivation, and the output path is valid, but we don't have
// its realisation stored (probably because it has been built
// without the `ca-derivations` experimental flag)
worker.store.registerDrvOutput(
Realisation{
drvOutput,
info.known->path,
}
);
}
}
}
// If we requested all the outputs via the empty set, we are always fine.
// If we requested specific elements, the loop above removes all the valid
// ones, so any that are left must be invalid.
if (!wantedOutputsLeft.empty())
throw Error("derivation '%s' does not have wanted outputs %s",
worker.store.printStorePath(drvPath),
concatStringsSep(", ", quoteStrings(wantedOutputsLeft)));
}

3
src/libstore/build/derivation-goal.hh
View file

@ -180,6 +180,9 @@ struct DerivationGoal : public Goal
/* Open a log file and a pipe to it. */
Path openLogFile();
/* Sign the newly built realisation if the store allows it */
virtual void signRealisation(Realisation&) {}
/* Close the log file. */
void closeLogFile();

122
src/libstore/build/drv-output-substitution-goal.cc Normal file
View file

@ -0,0 +1,122 @@
#include "drv-output-substitution-goal.hh"
#include "worker.hh"
#include "substitution-goal.hh"
namespace nix {
DrvOutputSubstitutionGoal::DrvOutputSubstitutionGoal(const DrvOutput& id, Worker & worker, RepairFlag repair, std::optional<ContentAddress> ca)
: Goal(worker)
, id(id)
{
state = &DrvOutputSubstitutionGoal::init;
name = fmt("substitution of '%s'", id.to_string());
trace("created");
}
void DrvOutputSubstitutionGoal::init()
{
trace("init");
/* If the derivation already exists, we’re done */
if (worker.store.queryRealisation(id)) {
amDone(ecSuccess);
return;
}
subs = settings.useSubstitutes ? getDefaultSubstituters() : std::list<ref<Store>>();
tryNext();
}
void DrvOutputSubstitutionGoal::tryNext()
{
trace("Trying next substituter");
if (subs.size() == 0) {
/* None left. Terminate this goal and let someone else deal
with it. */
debug("drv output '%s' is required, but there is no substituter that can provide it", id.to_string());
/* Hack: don't indicate failure if there were no substituters.
In that case the calling derivation should just do a
build. */
amDone(substituterFailed ? ecFailed : ecNoSubstituters);
if (substituterFailed) {
worker.failedSubstitutions++;
worker.updateProgress();
}
return;
}
auto sub = subs.front();
subs.pop_front();
// FIXME: Make async
outputInfo = sub->queryRealisation(id);
if (!outputInfo) {
tryNext();
return;
}
for (const auto & [depId, depPath] : outputInfo->dependentRealisations) {
if (depId != id) {
if (auto localOutputInfo = worker.store.queryRealisation(depId);
localOutputInfo && localOutputInfo->outPath != depPath) {
warn(
"substituter '%s' has an incompatible realisation for '%s', ignoring.\n"
"Local: %s\n"
"Remote: %s",
sub->getUri(),
depId.to_string(),
worker.store.printStorePath(localOutputInfo->outPath),
worker.store.printStorePath(depPath)
);
tryNext();
return;
}
addWaitee(worker.makeDrvOutputSubstitutionGoal(depId));
}
}
addWaitee(worker.makePathSubstitutionGoal(outputInfo->outPath));
if (waitees.empty()) outPathValid();
else state = &DrvOutputSubstitutionGoal::outPathValid;
}
void DrvOutputSubstitutionGoal::outPathValid()
{
assert(outputInfo);
trace("Output path substituted");
if (nrFailed > 0) {
debug("The output path of the derivation output '%s' could not be substituted", id.to_string());
amDone(nrNoSubstituters > 0 || nrIncompleteClosure > 0 ? ecIncompleteClosure : ecFailed);
return;
}
worker.store.registerDrvOutput(*outputInfo);
finished();
}
void DrvOutputSubstitutionGoal::finished()
{
trace("finished");
amDone(ecSuccess);
}
string DrvOutputSubstitutionGoal::key()
{
/* "a$" ensures substitution goals happen before derivation
goals. */
return "a$" + std::string(id.to_string());
}
void DrvOutputSubstitutionGoal::work()
{
(this->*state)();
}
}

50
src/libstore/build/drv-output-substitution-goal.hh Normal file
View file

@ -0,0 +1,50 @@
#pragma once
#include "store-api.hh"
#include "goal.hh"
#include "realisation.hh"
namespace nix {
class Worker;
// Substitution of a derivation output.
// This is done in three steps:
// 1. Fetch the output info from a substituter
// 2. Substitute the corresponding output path
// 3. Register the output info
class DrvOutputSubstitutionGoal : public Goal {
private:
// The drv output we're trying to substitue
DrvOutput id;
// The realisation corresponding to the given output id.
// Will be filled once we can get it.
std::optional<Realisation> outputInfo;
/* The remaining substituters. */
std::list<ref<Store>> subs;
/* Whether a substituter failed. */
bool substituterFailed = false;
public:
DrvOutputSubstitutionGoal(const DrvOutput& id, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
typedef void (DrvOutputSubstitutionGoal::*GoalState)();
GoalState state;
void init();
void tryNext();
void outPathValid();
void finished();
void timedOut(Error && ex) override { abort(); };
string key() override;
void work() override;
};
}

22
src/libstore/build/entry-points.cc
View file

@ -6,16 +6,20 @@
namespace nix {
void Store::buildPaths(const std::vector<StorePathWithOutputs> & drvPaths, BuildMode buildMode)
void Store::buildPaths(const std::vector<DerivedPath> & reqs, BuildMode buildMode)
{
Worker worker(*this);
Goals goals;
for (auto & path : drvPaths) {
if (path.path.isDerivation())
goals.insert(worker.makeDerivationGoal(path.path, path.outputs, buildMode));
else
goals.insert(worker.makeSubstitutionGoal(path.path, buildMode == bmRepair ? Repair : NoRepair));
for (auto & br : reqs) {
std::visit(overloaded {
[&](DerivedPath::Built bfd) {
goals.insert(worker.makeDerivationGoal(bfd.drvPath, bfd.outputs, buildMode));
},
[&](DerivedPath::Opaque bo) {
goals.insert(worker.makePathSubstitutionGoal(bo.path, buildMode == bmRepair ? Repair : NoRepair));
},
}, br.raw());
}
worker.run(goals);
@ -31,7 +35,7 @@ void Store::buildPaths(const std::vector<StorePathWithOutputs> & drvPaths, Build
}
if (i->exitCode != Goal::ecSuccess) {
if (auto i2 = dynamic_cast<DerivationGoal *>(i.get())) failed.insert(i2->drvPath);
else if (auto i2 = dynamic_cast<SubstitutionGoal *>(i.get())) failed.insert(i2->storePath);
else if (auto i2 = dynamic_cast<PathSubstitutionGoal *>(i.get())) failed.insert(i2->storePath);
}
}
@ -90,7 +94,7 @@ void Store::ensurePath(const StorePath & path)
if (isValidPath(path)) return;
Worker worker(*this);
GoalPtr goal = worker.makeSubstitutionGoal(path);
GoalPtr goal = worker.makePathSubstitutionGoal(path);
Goals goals = {goal};
worker.run(goals);
@ -108,7 +112,7 @@ void Store::ensurePath(const StorePath & path)
void LocalStore::repairPath(const StorePath & path)
{
Worker worker(*this);
GoalPtr goal = worker.makeSubstitutionGoal(path, Repair);
GoalPtr goal = worker.makePathSubstitutionGoal(path, Repair);
Goals goals = {goal};
worker.run(goals);

2
src/libstore/build/goal.cc
View file

@ -78,6 +78,8 @@ void Goal::amDone(ExitCode result, std::optional<Error> ex)
}
waiters.clear();
worker.removeGoal(shared_from_this());
cleanup();
}

2
src/libstore/build/goal.hh
View file

@ -100,6 +100,8 @@ struct Goal : public std::enable_shared_from_this<Goal>
virtual string key() = 0;
void amDone(ExitCode result, std::optional<Error> ex = {});
virtual void cleanup() { }
};
void addToWeakGoals(WeakGoals & goals, GoalPtr p);

160
src/libstore/build/local-derivation-goal.cc
View file

@ -153,6 +153,7 @@ void LocalDerivationGoal::killChild()
void LocalDerivationGoal::tryLocalBuild() {
unsigned int curBuilds = worker.getNrLocalBuilds();
if (curBuilds >= settings.maxBuildJobs) {
state = &DerivationGoal::tryToBuild;
worker.waitForBuildSlot(shared_from_this());
outputLocks.unlock();
return;
@ -287,17 +288,17 @@ bool LocalDerivationGoal::cleanupDecideWhetherDiskFull()
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
{
{
auto & localStore = getLocalStore();
uint64_t required = 8ULL * 1024 * 1024; // FIXME: make configurable
struct statvfs st;
if (statvfs(localStore.realStoreDir.c_str(), &st) == 0 &&
if (statvfs(localStore.realStoreDir.get().c_str(), &st) == 0 &&
(uint64_t) st.f_bavail * st.f_bsize < required)
diskFull = true;
if (statvfs(tmpDir.c_str(), &st) == 0 &&
(uint64_t) st.f_bavail * st.f_bsize < required)
diskFull = true;
}
}
#endif
deleteTmpDir(false);
@ -416,7 +417,7 @@ void LocalDerivationGoal::startBuilder()
}
auto & localStore = getLocalStore();
if (localStore.storeDir != localStore.realStoreDir) {
if (localStore.storeDir != localStore.realStoreDir.get()) {
#if __linux__
useChroot = true;
#else
@ -581,7 +582,9 @@ void LocalDerivationGoal::startBuilder()
throw Error("derivation '%s' requested impure path '%s', but it was not in allowed-impure-host-deps",
worker.store.printStorePath(drvPath), i);
dirsInChroot[i] = i;
/* Allow files in __impureHostDeps to be missing; e.g.
macOS 11+ has no /usr/lib/libSystem*.dylib */
dirsInChroot[i] = {i, true};
}
#if __linux__
@ -1190,6 +1193,26 @@ void LocalDerivationGoal::writeStructuredAttrs()
chownToBuilder(tmpDir + "/.attrs.sh");
}
static StorePath pathPartOfReq(const DerivedPath & req)
{
return std::visit(overloaded {
[&](DerivedPath::Opaque bo) {
return bo.path;
},
[&](DerivedPath::Built bfd) {
return bfd.drvPath;
},
}, req.raw());
}
bool LocalDerivationGoal::isAllowed(const DerivedPath & req)
{
return this->isAllowed(pathPartOfReq(req));
}
struct RestrictedStoreConfig : virtual LocalFSStoreConfig
{
using LocalFSStoreConfig::LocalFSStoreConfig;
@ -1310,33 +1333,52 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
std::optional<const Realisation> queryRealisation(const DrvOutput & id) override
// XXX: This should probably be allowed if the realisation corresponds to
// an allowed derivation
{ throw Error("queryRealisation"); }
{
if (!goal.isAllowed(id))
throw InvalidPath("cannot query an unknown output id '%s' in recursive Nix", id.to_string());
return next->queryRealisation(id);
}
void buildPaths(const std::vector<StorePathWithOutputs> & paths, BuildMode buildMode) override
void buildPaths(const std::vector<DerivedPath> & paths, BuildMode buildMode) override
{
if (buildMode != bmNormal) throw Error("unsupported build mode");
StorePathSet newPaths;
std::set<Realisation> newRealisations;
for (auto & path : paths) {
if (!goal.isAllowed(path.path))
throw InvalidPath("cannot build unknown path '%s' in recursive Nix", printStorePath(path.path));
for (auto & req : paths) {
if (!goal.isAllowed(req))
throw InvalidPath("cannot build '%s' in recursive Nix because path is unknown", req.to_string(*next));
}
next->buildPaths(paths, buildMode);
for (auto & path : paths) {
if (!path.path.isDerivation()) continue;
auto outputs = next->queryDerivationOutputMap(path.path);
for (auto & output : outputs)
if (wantOutput(output.first, path.outputs))
newPaths.insert(output.second);
auto p = std::get_if<DerivedPath::Built>(&path);
if (!p) continue;
auto & bfd = *p;
auto drv = readDerivation(bfd.drvPath);
auto drvHashes = staticOutputHashes(*this, drv);
auto outputs = next->queryDerivationOutputMap(bfd.drvPath);
for (auto & [outputName, outputPath] : outputs)
if (wantOutput(outputName, bfd.outputs)) {
newPaths.insert(outputPath);
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
auto thisRealisation = next->queryRealisation(
DrvOutput{drvHashes.at(outputName), outputName}
);
assert(thisRealisation);
newRealisations.insert(*thisRealisation);
}
}
}
StorePathSet closure;
next->computeFSClosure(newPaths, closure);
for (auto & path : closure)
goal.addDependency(path);
for (auto & real : Realisation::closure(*next, newRealisations))
goal.addedDrvOutputs.insert(real.id);
}
BuildResult buildDerivation(const StorePath & drvPath, const BasicDerivation & drv,
@ -1358,7 +1400,7 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
void addSignatures(const StorePath & storePath, const StringSet & sigs) override
{ unsupported("addSignatures"); }
void queryMissing(const std::vector<StorePathWithOutputs> & targets,
void queryMissing(const std::vector<DerivedPath> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
uint64_t & downloadSize, uint64_t & narSize) override
{
@ -1366,12 +1408,12 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
client about what paths will be built/substituted or are
already present. Probably not a big deal. */
std::vector<StorePathWithOutputs> allowed;
for (auto & path : targets) {
if (goal.isAllowed(path.path))
allowed.emplace_back(path);
std::vector<DerivedPath> allowed;
for (auto & req : targets) {
if (goal.isAllowed(req))
allowed.emplace_back(req);
else
unknown.insert(path.path);
unknown.insert(pathPartOfReq(req));
}
next->queryMissing(allowed, willBuild, willSubstitute,
@ -1703,18 +1745,18 @@ void LocalDerivationGoal::runChild()
network, so give them access to /etc/resolv.conf and so
on. */
if (derivationIsImpure(derivationType)) {
ss.push_back("/etc/resolv.conf");
// Only use nss functions to resolve hosts and
// services. Don’t use it for anything else that may
// be configured for this system. This limits the
// potential impurities introduced in fixed-outputs.
writeFile(chrootRootDir + "/etc/nsswitch.conf", "hosts: files dns\nservices: files\n");
ss.push_back("/etc/services");
ss.push_back("/etc/hosts");
if (pathExists("/var/run/nscd/socket"))
ss.push_back("/var/run/nscd/socket");
/* N.B. it is realistic that these paths might not exist. It
happens when testing Nix building fixed-output derivations
within a pure derivation. */
for (auto & path : { "/etc/resolv.conf", "/etc/services", "/etc/hosts", "/var/run/nscd/socket" })
if (pathExists(path))
ss.push_back(path);
}
for (auto & i : ss) dirsInChroot.emplace(i, i);
@ -2276,10 +2318,6 @@ void LocalDerivationGoal::registerOutputs()
sink.s = make_ref<std::string>(rewriteStrings(*sink.s, outputRewrites));
StringSource source(*sink.s);
restorePath(actualPath, source);
/* FIXME: set proper permissions in restorePath() so
we don't have to do another traversal. */
canonicalisePathMetaData(actualPath, -1, inodesSeen);
}
};
@ -2333,32 +2371,19 @@ void LocalDerivationGoal::registerOutputs()
}
auto got = caSink.finish().first;
auto refs = rewriteRefs();
HashModuloSink narSink { htSHA256, oldHashPart };
dumpPath(actualPath, narSink);
auto narHashAndSize = narSink.finish();
ValidPathInfo newInfo0 {
worker.store.makeFixedOutputPath(
auto finalPath = worker.store.makeFixedOutputPath(
outputHash.method,
got,
outputPathName(drv->name, outputName),
refs.second,
refs.first),
narHashAndSize.first,
};
newInfo0.narSize = narHashAndSize.second;
newInfo0.ca = FixedOutputHash {
.method = outputHash.method,
.hash = got,
};
newInfo0.references = refs.second;
if (refs.first)
newInfo0.references.insert(newInfo0.path);
if (scratchPath != newInfo0.path) {
refs.first);
if (scratchPath != finalPath) {
// Also rewrite the output path
auto source = sinkToSource([&](Sink & nextSink) {
StringSink sink;
dumpPath(actualPath, sink);
RewritingSink rsink2(oldHashPart, std::string(newInfo0.path.hashPart()), nextSink);
RewritingSink rsink2(oldHashPart, std::string(finalPath.hashPart()), nextSink);
rsink2(*sink.s);
rsink2.flush();
});
@ -2368,6 +2393,21 @@ void LocalDerivationGoal::registerOutputs()
movePath(tmpPath, actualPath);
}
HashResult narHashAndSize = hashPath(htSHA256, actualPath);
ValidPathInfo newInfo0 {
finalPath,
narHashAndSize.first,
};
newInfo0.narSize = narHashAndSize.second;
newInfo0.ca = FixedOutputHash {
.method = outputHash.method,
.hash = got,
};
newInfo0.references = refs.second;
if (refs.first)
newInfo0.references.insert(newInfo0.path);
assert(newInfo0.ca);
return newInfo0;
};
@ -2428,6 +2468,10 @@ void LocalDerivationGoal::registerOutputs()
},
}, output.output);
/* FIXME: set proper permissions in restorePath() so
we don't have to do another traversal. */
canonicalisePathMetaData(actualPath, -1, inodesSeen);
/* Calculate where we'll move the output files. In the checking case we
will leave leave them where they are, for now, rather than move to
their usual "final destination" */
@ -2460,6 +2504,7 @@ void LocalDerivationGoal::registerOutputs()
assert(newInfo.ca);
} else {
auto destPath = worker.store.toRealPath(finalDestPath);
deletePath(destPath);
movePath(actualPath, destPath);
actualPath = destPath;
}
@ -2615,13 +2660,22 @@ void LocalDerivationGoal::registerOutputs()
but it's fine to do in all cases. */
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
for (auto& [outputName, newInfo] : infos)
worker.store.registerDrvOutput(Realisation{
.id = DrvOutput{initialOutputs.at(outputName).outputHash, outputName},
.outPath = newInfo.path});
for (auto& [outputName, newInfo] : infos) {
auto thisRealisation = Realisation{
.id = DrvOutput{initialOutputs.at(outputName).outputHash,
outputName},
.outPath = newInfo.path};
signRealisation(thisRealisation);
worker.store.registerDrvOutput(thisRealisation);
}
}
}
void LocalDerivationGoal::signRealisation(Realisation & realisation)
{
getLocalStore().signRealisation(realisation);
}
void LocalDerivationGoal::checkOutputs(const std::map<Path, ValidPathInfo> & outputs)
{

11
src/libstore/build/local-derivation-goal.hh
View file

@ -108,6 +108,9 @@ struct LocalDerivationGoal : public DerivationGoal
/* Paths that were added via recursive Nix calls. */
StorePathSet addedPaths;
/* Realisations that were added via recursive Nix calls. */
std::set<DrvOutput> addedDrvOutputs;
/* Recursive Nix calls are only allowed to build or realize paths
in the original input closure or added via a recursive Nix call
(so e.g. you can't do 'nix-store -r /nix/store/<bla>' where
@ -116,6 +119,12 @@ struct LocalDerivationGoal : public DerivationGoal
{
return inputPaths.count(path) || addedPaths.count(path);
}
bool isAllowed(const DrvOutput & id)
{
return addedDrvOutputs.count(id);
}
bool isAllowed(const DerivedPath & req);
friend struct RestrictedStore;
@ -161,6 +170,8 @@ struct LocalDerivationGoal : public DerivationGoal
as valid. */
void registerOutputs() override;
void signRealisation(Realisation &) override;
/* Check that an output meets the requirements specified by the
'outputChecks' attribute (or the legacy
'{allowed,disallowed}{References,Requisites}' attributes). */

65
src/libstore/build/substitution-goal.cc
View file

@ -5,40 +5,32 @@
namespace nix {
SubstitutionGoal::SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair, std::optional<ContentAddress> ca)
PathSubstitutionGoal::PathSubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair, std::optional<ContentAddress> ca)
: Goal(worker)
, storePath(storePath)
, repair(repair)
, ca(ca)
{
state = &SubstitutionGoal::init;
state = &PathSubstitutionGoal::init;
name = fmt("substitution of '%s'", worker.store.printStorePath(this->storePath));
trace("created");
maintainExpectedSubstitutions = std::make_unique<MaintainCount<uint64_t>>(worker.expectedSubstitutions);
}
SubstitutionGoal::~SubstitutionGoal()
PathSubstitutionGoal::~PathSubstitutionGoal()
{
try {
if (thr.joinable()) {
// FIXME: signal worker thread to quit.
thr.join();
worker.childTerminated(this);
}
} catch (...) {
ignoreException();
}
cleanup();
}
void SubstitutionGoal::work()
void PathSubstitutionGoal::work()
{
(this->*state)();
}
void SubstitutionGoal::init()
void PathSubstitutionGoal::init()
{
trace("init");
@ -59,10 +51,12 @@ void SubstitutionGoal::init()
}
void SubstitutionGoal::tryNext()
void PathSubstitutionGoal::tryNext()
{
trace("trying next substituter");
cleanup();
if (subs.size() == 0) {
/* None left. Terminate this goal and let someone else deal
with it. */
@ -142,7 +136,7 @@ void SubstitutionGoal::tryNext()
/* Bail out early if this substituter lacks a valid
signature. LocalStore::addToStore() also checks for this, but
only after we've downloaded the path. */
if (!sub->isTrusted && worker.store.pathInfoIsTrusted(*info))
if (!sub->isTrusted && worker.store.pathInfoIsUntrusted(*info))
{
warn("substituter '%s' does not have a valid signature for path '%s'",
sub->getUri(), worker.store.printStorePath(storePath));
@ -154,16 +148,16 @@ void SubstitutionGoal::tryNext()
paths referenced by this one. */
for (auto & i : info->references)
if (i != storePath) /* ignore self-references */
addWaitee(worker.makeSubstitutionGoal(i));
addWaitee(worker.makePathSubstitutionGoal(i));
if (waitees.empty()) /* to prevent hang (no wake-up event) */
referencesValid();
else
state = &SubstitutionGoal::referencesValid;
state = &PathSubstitutionGoal::referencesValid;
}
void SubstitutionGoal::referencesValid()
void PathSubstitutionGoal::referencesValid()
{
trace("all references realised");
@ -177,12 +171,12 @@ void SubstitutionGoal::referencesValid()
if (i != storePath) /* ignore self-references */
assert(worker.store.isValidPath(i));
state = &SubstitutionGoal::tryToRun;
state = &PathSubstitutionGoal::tryToRun;
worker.wakeUp(shared_from_this());
}
void SubstitutionGoal::tryToRun()
void PathSubstitutionGoal::tryToRun()
{
trace("trying to run");
@ -205,7 +199,7 @@ void SubstitutionGoal::tryToRun()
thr = std::thread([this]() {
try {
/* Wake up the worker loop when we're done. */
Finally updateStats([this]() { outPipe.writeSide = -1; });
Finally updateStats([this]() { outPipe.writeSide.close(); });
Activity act(*logger, actSubstitute, Logger::Fields{worker.store.printStorePath(storePath), sub->getUri()});
PushActivity pact(act.id);
@ -221,11 +215,11 @@ void SubstitutionGoal::tryToRun()
worker.childStarted(shared_from_this(), {outPipe.readSide.get()}, true, false);
state = &SubstitutionGoal::finished;
state = &PathSubstitutionGoal::finished;
}
void SubstitutionGoal::finished()
void PathSubstitutionGoal::finished()
{
trace("substitute finished");
@ -249,7 +243,7 @@ void SubstitutionGoal::finished()
}
/* Try the next substitute. */
state = &SubstitutionGoal::tryNext;
state = &PathSubstitutionGoal::tryNext;
worker.wakeUp(shared_from_this());
return;
}
@ -278,14 +272,31 @@ void SubstitutionGoal::finished()
}
void SubstitutionGoal::handleChildOutput(int fd, const string & data)
void PathSubstitutionGoal::handleChildOutput(int fd, const string & data)
{
}
void SubstitutionGoal::handleEOF(int fd)
void PathSubstitutionGoal::handleEOF(int fd)
{
if (fd == outPipe.readSide.get()) worker.wakeUp(shared_from_this());
}
void PathSubstitutionGoal::cleanup()
{
try {
if (thr.joinable()) {
// FIXME: signal worker thread to quit.
thr.join();
worker.childTerminated(this);
}
outPipe.close();
} catch (...) {
ignoreException();
}
}
}

13
src/libstore/build/substitution-goal.hh
View file

@ -8,13 +8,13 @@ namespace nix {
class Worker;
struct SubstitutionGoal : public Goal
struct PathSubstitutionGoal : public Goal
{
/* 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. */
different when the stores have different names. */
std::optional<StorePath> subPath;
/* The remaining substituters. */
@ -47,14 +47,15 @@ struct SubstitutionGoal : public Goal
std::unique_ptr<MaintainCount<uint64_t>> maintainExpectedSubstitutions,
maintainRunningSubstitutions, maintainExpectedNar, maintainExpectedDownload;
typedef void (SubstitutionGoal::*GoalState)();
typedef void (PathSubstitutionGoal::*GoalState)();
GoalState state;
/* Content address for recomputing store path */
std::optional<ContentAddress> ca;
SubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
~SubstitutionGoal();
public:
PathSubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
~PathSubstitutionGoal();
void timedOut(Error && ex) override { abort(); };
@ -78,6 +79,8 @@ struct SubstitutionGoal : public Goal
/* Callback used by the worker to write to the log. */
void handleChildOutput(int fd, const string & data) override;
void handleEOF(int fd) override;
void cleanup() override;
};
}

41
src/libstore/build/worker.cc
View file

@ -1,6 +1,7 @@
#include "machines.hh"
#include "worker.hh"
#include "substitution-goal.hh"
#include "drv-output-substitution-goal.hh"
#include "local-derivation-goal.hh"
#include "hook-instance.hh"
@ -78,20 +79,32 @@ std::shared_ptr<DerivationGoal> Worker::makeBasicDerivationGoal(const StorePath
}
std::shared_ptr<SubstitutionGoal> Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair, std::optional<ContentAddress> ca)
std::shared_ptr<PathSubstitutionGoal> Worker::makePathSubstitutionGoal(const StorePath & path, RepairFlag repair, std::optional<ContentAddress> ca)
{
std::weak_ptr<SubstitutionGoal> & goal_weak = substitutionGoals[path];
std::weak_ptr<PathSubstitutionGoal> & goal_weak = substitutionGoals[path];
auto goal = goal_weak.lock(); // FIXME
if (!goal) {
goal = std::make_shared<SubstitutionGoal>(path, *this, repair, ca);
goal = std::make_shared<PathSubstitutionGoal>(path, *this, repair, ca);
goal_weak = goal;
wakeUp(goal);
}
return goal;
}
template<typename G>
static void removeGoal(std::shared_ptr<G> goal, std::map<StorePath, std::weak_ptr<G>> & goalMap)
std::shared_ptr<DrvOutputSubstitutionGoal> Worker::makeDrvOutputSubstitutionGoal(const DrvOutput& id, RepairFlag repair, std::optional<ContentAddress> ca)
{
std::weak_ptr<DrvOutputSubstitutionGoal> & goal_weak = drvOutputSubstitutionGoals[id];
auto goal = goal_weak.lock(); // FIXME
if (!goal) {
goal = std::make_shared<DrvOutputSubstitutionGoal>(id, *this, repair, ca);
goal_weak = goal;
wakeUp(goal);
}
return goal;
}
template<typename K, typename G>
static void removeGoal(std::shared_ptr<G> goal, std::map<K, std::weak_ptr<G>> & goalMap)
{
/* !!! inefficient */
for (auto i = goalMap.begin();
@ -109,10 +122,13 @@ void Worker::removeGoal(GoalPtr goal)
{
if (auto drvGoal = std::dynamic_pointer_cast<DerivationGoal>(goal))
nix::removeGoal(drvGoal, derivationGoals);
else if (auto subGoal = std::dynamic_pointer_cast<SubstitutionGoal>(goal))
else if (auto subGoal = std::dynamic_pointer_cast<PathSubstitutionGoal>(goal))
nix::removeGoal(subGoal, substitutionGoals);
else if (auto subGoal = std::dynamic_pointer_cast<DrvOutputSubstitutionGoal>(goal))
nix::removeGoal(subGoal, drvOutputSubstitutionGoals);
else
assert(false);
if (topGoals.find(goal) != topGoals.end()) {
topGoals.erase(goal);
/* If a top-level goal failed, then kill all other goals
@ -211,14 +227,14 @@ void Worker::waitForAWhile(GoalPtr goal)
void Worker::run(const Goals & _topGoals)
{
std::vector<nix::StorePathWithOutputs> topPaths;
std::vector<nix::DerivedPath> topPaths;
for (auto & i : _topGoals) {
topGoals.insert(i);
if (auto goal = dynamic_cast<DerivationGoal *>(i.get())) {
topPaths.push_back({goal->drvPath, goal->wantedOutputs});
} else if (auto goal = dynamic_cast<SubstitutionGoal *>(i.get())) {
topPaths.push_back({goal->storePath});
topPaths.push_back(DerivedPath::Built{goal->drvPath, goal->wantedOutputs});
} else if (auto goal = dynamic_cast<PathSubstitutionGoal *>(i.get())) {
topPaths.push_back(DerivedPath::Opaque{goal->storePath});
}
}
@ -471,7 +487,10 @@ void Worker::markContentsGood(const StorePath & path)
}
GoalPtr upcast_goal(std::shared_ptr<SubstitutionGoal> subGoal) {
GoalPtr upcast_goal(std::shared_ptr<PathSubstitutionGoal> subGoal) {
return subGoal;
}
GoalPtr upcast_goal(std::shared_ptr<DrvOutputSubstitutionGoal> subGoal) {
return subGoal;
}

17
src/libstore/build/worker.hh
View file

@ -4,6 +4,7 @@
#include "lock.hh"
#include "store-api.hh"
#include "goal.hh"
#include "realisation.hh"
#include <future>
#include <thread>
@ -12,18 +13,20 @@ namespace nix {
/* Forward definition. */
struct DerivationGoal;
struct SubstitutionGoal;
struct PathSubstitutionGoal;
class DrvOutputSubstitutionGoal;
/* Workaround for not being able to declare a something like
class SubstitutionGoal : public Goal;
class PathSubstitutionGoal : public Goal;
even when Goal is a complete type.
This is still a static cast. The purpose of exporting it is to define it in
a place where `SubstitutionGoal` is concrete, and use it in a place where it
a place where `PathSubstitutionGoal` is concrete, and use it in a place where it
is opaque. */
GoalPtr upcast_goal(std::shared_ptr<SubstitutionGoal> subGoal);
GoalPtr upcast_goal(std::shared_ptr<PathSubstitutionGoal> subGoal);
GoalPtr upcast_goal(std::shared_ptr<DrvOutputSubstitutionGoal> subGoal);
typedef std::chrono::time_point<std::chrono::steady_clock> steady_time_point;
@ -72,7 +75,8 @@ private:
/* Maps used to prevent multiple instantiations of a goal for the
same derivation / path. */
std::map<StorePath, std::weak_ptr<DerivationGoal>> derivationGoals;
std::map<StorePath, std::weak_ptr<SubstitutionGoal>> substitutionGoals;
std::map<StorePath, std::weak_ptr<PathSubstitutionGoal>> substitutionGoals;
std::map<DrvOutput, std::weak_ptr<DrvOutputSubstitutionGoal>> drvOutputSubstitutionGoals;
/* Goals waiting for busy paths to be unlocked. */
WeakGoals waitingForAnyGoal;
@ -146,7 +150,8 @@ public:
const StringSet & wantedOutputs, BuildMode buildMode = bmNormal);
/* substitution goal */
std::shared_ptr<SubstitutionGoal> makeSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
std::shared_ptr<PathSubstitutionGoal> makePathSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
std::shared_ptr<DrvOutputSubstitutionGoal> makeDrvOutputSubstitutionGoal(const DrvOutput & id, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
/* Remove a dead goal. */
void removeGoal(GoalPtr goal);

12
src/libstore/ca-specific-schema.sql
View file

@ -3,9 +3,19 @@
-- is enabled
create table if not exists Realisations (
id integer primary key autoincrement not null,
drvPath text not null,
outputName text not null, -- symbolic output id, usually "out"
outputPath integer not null,
primary key (drvPath, outputName),
signatures text, -- space-separated list
foreign key (outputPath) references ValidPaths(id) on delete cascade
);
create index if not exists IndexRealisations on Realisations(drvPath, outputName);
create table if not exists RealisationsRefs (
referrer integer not null,
realisationReference integer,
foreign key (referrer) references Realisations(id) on delete cascade,
foreign key (realisationReference) references Realisations(id) on delete restrict
);

52
src/libstore/daemon.cc
View file

@ -2,6 +2,7 @@
#include "monitor-fd.hh"
#include "worker-protocol.hh"
#include "store-api.hh"
#include "path-with-outputs.hh"
#include "finally.hh"
#include "affinity.hh"
#include "archive.hh"
@ -259,6 +260,18 @@ static void writeValidPathInfo(
}
}
static std::vector<DerivedPath> readDerivedPaths(Store & store, unsigned int clientVersion, Source & from)
{
std::vector<DerivedPath> reqs;
if (GET_PROTOCOL_MINOR(clientVersion) >= 30) {
reqs = worker_proto::read(store, from, Phantom<std::vector<DerivedPath>> {});
} else {
for (auto & s : readStrings<Strings>(from))
reqs.push_back(parsePathWithOutputs(store, s).toDerivedPath());
}
return reqs;
}
static void performOp(TunnelLogger * logger, ref<Store> store,
TrustedFlag trusted, RecursiveFlag recursive, unsigned int clientVersion,
Source & from, BufferedSink & to, unsigned int op)
@ -493,9 +506,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
}
case wopBuildPaths: {
std::vector<StorePathWithOutputs> drvs;
for (auto & s : readStrings<Strings>(from))
drvs.push_back(store->parsePathWithOutputs(s));
auto drvs = readDerivedPaths(*store, clientVersion, from);
BuildMode mode = bmNormal;
if (GET_PROTOCOL_MINOR(clientVersion) >= 15) {
mode = (BuildMode) readInt(from);
@ -575,7 +586,10 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
auto res = store->buildDerivation(drvPath, drv, buildMode);
logger->stopWork();
to << res.status << res.errorMsg;
if (GET_PROTOCOL_MINOR(clientVersion) >= 0xc) {
if (GET_PROTOCOL_MINOR(clientVersion) >= 29) {
to << res.timesBuilt << res.isNonDeterministic << res.startTime << res.stopTime;
}
if (GET_PROTOCOL_MINOR(clientVersion) >= 28) {
worker_proto::write(*store, to, res.builtOutputs);
}
break;
@ -856,9 +870,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
}
case wopQueryMissing: {
std::vector<StorePathWithOutputs> targets;
for (auto & s : readStrings<Strings>(from))
targets.push_back(store->parsePathWithOutputs(s));
auto targets = readDerivedPaths(*store, clientVersion, from);
logger->startWork();
StorePathSet willBuild, willSubstitute, unknown;
uint64_t downloadSize, narSize;
@ -873,11 +885,15 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopRegisterDrvOutput: {
logger->startWork();
auto outputId = DrvOutput::parse(readString(from));
auto outputPath = StorePath(readString(from));
auto resolvedDrv = StorePath(readString(from));
store->registerDrvOutput(Realisation{
.id = outputId, .outPath = outputPath});
if (GET_PROTOCOL_MINOR(clientVersion) < 31) {
auto outputId = DrvOutput::parse(readString(from));
auto outputPath = StorePath(readString(from));
store->registerDrvOutput(Realisation{
.id = outputId, .outPath = outputPath});
} else {
auto realisation = worker_proto::read(*store, from, Phantom<Realisation>());
store->registerDrvOutput(realisation);
}
logger->stopWork();
break;
}
@ -887,9 +903,15 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
auto outputId = DrvOutput::parse(readString(from));
auto info = store->queryRealisation(outputId);
logger->stopWork();
std::set<StorePath> outPaths;
if (info) outPaths.insert(info->outPath);
worker_proto::write(*store, to, outPaths);
if (GET_PROTOCOL_MINOR(clientVersion) < 31) {
std::set<StorePath> outPaths;
if (info) outPaths.insert(info->outPath);
worker_proto::write(*store, to, outPaths);
} else {
std::set<Realisation> realisations;
if (info) realisations.insert(*info);
worker_proto::write(*store, to, realisations);
}
break;
}

8
src/libstore/derivations.cc
View file

@ -590,14 +590,6 @@ std::map<std::string, Hash> staticOutputHashes(Store& store, const Derivation& d
}
std::string StorePathWithOutputs::to_string(const Store & store) const
{
return outputs.empty()
? store.printStorePath(path)
: store.printStorePath(path) + "!" + concatStringsSep(",", outputs);
}
bool wantOutput(const string & output, const std::set<string> & wanted)
{
return wanted.empty() || wanted.find(output) != wanted.end();

2
src/libstore/derivations.hh
View file

@ -52,7 +52,7 @@ struct DerivationOutput
DerivationOutputCAFloating,
DerivationOutputDeferred
> output;
std::optional<HashType> hashAlgoOpt(const Store & store) const;
/* Note, when you use this function you should make sure that you're passing
the right derivation name. When in doubt, you should use the safer
interface provided by BasicDerivation::outputsAndOptPaths */

118
src/libstore/derived-path.cc Normal file
View file

@ -0,0 +1,118 @@
#include "derived-path.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
namespace nix {
nlohmann::json DerivedPath::Opaque::toJSON(ref<Store> store) const {
nlohmann::json res;
res["path"] = store->printStorePath(path);
return res;
}
nlohmann::json BuiltPath::Built::toJSON(ref<Store> store) const {
nlohmann::json res;
res["drvPath"] = store->printStorePath(drvPath);
for (const auto& [output, path] : outputs) {
res["outputs"][output] = store->printStorePath(path);
}
return res;
}
StorePathSet BuiltPath::outPaths() const
{
return std::visit(
overloaded{
[](BuiltPath::Opaque p) { return StorePathSet{p.path}; },
[](BuiltPath::Built b) {
StorePathSet res;
for (auto & [_, path] : b.outputs)
res.insert(path);
return res;
},
}, raw()
);
}
nlohmann::json derivedPathsWithHintsToJSON(const BuiltPaths & buildables, ref<Store> store) {
auto res = nlohmann::json::array();
for (const BuiltPath & buildable : buildables) {
std::visit([&res, store](const auto & buildable) {
res.push_back(buildable.toJSON(store));
}, buildable.raw());
}
return res;
}
std::string DerivedPath::Opaque::to_string(const Store & store) const {
return store.printStorePath(path);
}
std::string DerivedPath::Built::to_string(const Store & store) const {
return store.printStorePath(drvPath)
+ "!"
+ (outputs.empty() ? std::string { "*" } : concatStringsSep(",", outputs));
}
std::string DerivedPath::to_string(const Store & store) const
{
return std::visit(
[&](const auto & req) { return req.to_string(store); },
this->raw());
}
DerivedPath::Opaque DerivedPath::Opaque::parse(const Store & store, std::string_view s)
{
return {store.parseStorePath(s)};
}
DerivedPath::Built DerivedPath::Built::parse(const Store & store, std::string_view s)
{
size_t n = s.find("!");
assert(n != s.npos);
auto drvPath = store.parseStorePath(s.substr(0, n));
auto outputsS = s.substr(n + 1);
std::set<string> outputs;
if (outputsS != "*")
outputs = tokenizeString<std::set<string>>(outputsS, ",");
return {drvPath, outputs};
}
DerivedPath DerivedPath::parse(const Store & store, std::string_view s)
{
size_t n = s.find("!");
return n == s.npos
? (DerivedPath) DerivedPath::Opaque::parse(store, s)
: (DerivedPath) DerivedPath::Built::parse(store, s);
}
RealisedPath::Set BuiltPath::toRealisedPaths(Store & store) const
{
RealisedPath::Set res;
std::visit(
overloaded{
[&](BuiltPath::Opaque p) { res.insert(p.path); },
[&](BuiltPath::Built p) {
auto drvHashes =
staticOutputHashes(store, store.readDerivation(p.drvPath));
for (auto& [outputName, outputPath] : p.outputs) {
if (settings.isExperimentalFeatureEnabled(
"ca-derivations")) {
auto thisRealisation = store.queryRealisation(
DrvOutput{drvHashes.at(outputName), outputName});
assert(thisRealisation); // We’ve built it, so we must h
// ve the realisation
res.insert(*thisRealisation);
} else {
res.insert(outputPath);
}
}
},
},
raw());
return res;
}
}

123
src/libstore/derived-path.hh Normal file
View file

@ -0,0 +1,123 @@
#pragma once
#include "util.hh"
#include "path.hh"
#include "realisation.hh"
#include <optional>
#include <nlohmann/json_fwd.hpp>
namespace nix {
class Store;
/**
* An opaque derived path.
*
* Opaque derived paths are just store paths, and fully evaluated. They
* cannot be simplified further. Since they are opaque, they cannot be
* built, but they can fetched.
*/
struct DerivedPathOpaque {
StorePath path;
nlohmann::json toJSON(ref<Store> store) const;
std::string to_string(const Store & store) const;
static DerivedPathOpaque parse(const Store & store, std::string_view);
};
/**
* A derived path that is built from a derivation
*
* Built derived paths are pair of a derivation and some output names.
* They are evaluated by building the derivation, and then replacing the
* output names with the resulting outputs.
*
* Note that does mean a derived store paths evaluates to multiple
* opaque paths, which is sort of icky as expressions are supposed to
* evaluate to single values. Perhaps this should have just a single
* output name.
*/
struct DerivedPathBuilt {
StorePath drvPath;
std::set<std::string> outputs;
std::string to_string(const Store & store) const;
static DerivedPathBuilt parse(const Store & store, std::string_view);
};
using _DerivedPathRaw = std::variant<
DerivedPathOpaque,
DerivedPathBuilt
>;
/**
* A "derived path" is a very simple sort of expression that evaluates
* to (concrete) store path. It is either:
*
* - opaque, in which case it is just a concrete store path with
* possibly no known derivation
*
* - built, in which case it is a pair of a derivation path and an
* output name.
*/
struct DerivedPath : _DerivedPathRaw {
using Raw = _DerivedPathRaw;
using Raw::Raw;
using Opaque = DerivedPathOpaque;
using Built = DerivedPathBuilt;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
std::string to_string(const Store & store) const;
static DerivedPath parse(const Store & store, std::string_view);
};
/**
* A built derived path with hints in the form of optional concrete output paths.
*
* See 'BuiltPath' for more an explanation.
*/
struct BuiltPathBuilt {
StorePath drvPath;
std::map<std::string, StorePath> outputs;
nlohmann::json toJSON(ref<Store> store) const;
static BuiltPathBuilt parse(const Store & store, std::string_view);
};
using _BuiltPathRaw = std::variant<
DerivedPath::Opaque,
BuiltPathBuilt
>;
/**
* A built path. Similar to a `DerivedPath`, but enriched with the corresponding
* output path(s).
*/
struct BuiltPath : _BuiltPathRaw {
using Raw = _BuiltPathRaw;
using Raw::Raw;
using Opaque = DerivedPathOpaque;
using Built = BuiltPathBuilt;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
StorePathSet outPaths() const;
RealisedPath::Set toRealisedPaths(Store & store) const;
};
typedef std::vector<DerivedPath> DerivedPaths;
typedef std::vector<BuiltPath> BuiltPaths;
nlohmann::json derivedPathsWithHintsToJSON(const BuiltPaths & buildables, ref<Store> store);
}

8
src/libstore/filetransfer.cc
View file

@ -7,7 +7,7 @@
#include "finally.hh"
#include "callback.hh"
#ifdef ENABLE_S3
#if ENABLE_S3
#include <aws/core/client/ClientConfiguration.h>
#endif
@ -148,7 +148,7 @@ struct curlFileTransfer : public FileTransfer
}
LambdaSink finalSink;
std::shared_ptr<CompressionSink> decompressionSink;
std::shared_ptr<FinishSink> decompressionSink;
std::optional<StringSink> errorSink;
std::exception_ptr writeException;
@ -665,7 +665,7 @@ struct curlFileTransfer : public FileTransfer
writeFull(wakeupPipe.writeSide.get(), " ");
}
#ifdef ENABLE_S3
#if ENABLE_S3
std::tuple<std::string, std::string, Store::Params> parseS3Uri(std::string uri)
{
auto [path, params] = splitUriAndParams(uri);
@ -688,7 +688,7 @@ struct curlFileTransfer : public FileTransfer
if (hasPrefix(request.uri, "s3://")) {
// FIXME: do this on a worker thread
try {
#ifdef ENABLE_S3
#if ENABLE_S3
auto [bucketName, key, params] = parseS3Uri(request.uri);
std::string profile = get(params, "profile").value_or("");

4
src/libstore/gc.cc
View file

@ -775,7 +775,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
try {
AutoCloseDir dir(opendir(realStoreDir.c_str()));
AutoCloseDir dir(opendir(realStoreDir.get().c_str()));
if (!dir) throw SysError("opening directory '%1%'", realStoreDir);
/* Read the store and immediately delete all paths that
@ -856,7 +856,7 @@ void LocalStore::autoGC(bool sync)
return std::stoll(readFile(*fakeFreeSpaceFile));
struct statvfs st;
if (statvfs(realStoreDir.c_str(), &st))
if (statvfs(realStoreDir.get().c_str(), &st))
throw SysError("getting filesystem info about '%s'", realStoreDir);
return (uint64_t) st.f_bavail * st.f_frsize;

2
src/libstore/globals.cc
View file

@ -81,7 +81,7 @@ void loadConfFile()
/* We only want to send overrides to the daemon, i.e. stuff from
~/.nix/nix.conf or the command line. */
globalConfig.resetOverriden();
globalConfig.resetOverridden();
auto files = settings.nixUserConfFiles;
for (auto file = files.rbegin(); file != files.rend(); file++) {

13
src/libstore/globals.hh
View file

@ -206,7 +206,10 @@ public:
Setting<std::string> builders{
this, "@" + nixConfDir + "/machines", "builders",
"A semicolon-separated list of build machines, in the format of `nix.machines`."};
R"(
A semicolon-separated list of build machines.
For the exact format and examples, see [the manual chapter on remote builds](../advanced-topics/distributed-builds.md)
)"};
Setting<bool> buildersUseSubstitutes{
this, false, "builders-use-substitutes",
@ -614,8 +617,10 @@ public:
Strings{"https://cache.nixos.org/"},
"substituters",
R"(
A list of URLs of substituters, separated by whitespace. The default
is `https://cache.nixos.org`.
A list of URLs of substituters, separated by whitespace. Substituters
are tried based on their Priority value, which each substituter can set
independently. Lower value means higher priority.
The default is `https://cache.nixos.org`, with a Priority of 40.
)",
{"binary-caches"}};
@ -698,7 +703,7 @@ public:
send a series of commands to modify various settings to stdout. The
currently recognized commands are:
- `extra-sandbox-paths`
- `extra-sandbox-paths`\
Pass a list of files and directories to be included in the
sandbox for this build. One entry per line, terminated by an
empty line. Entries have the same format as `sandbox-paths`.

16
src/libstore/legacy-ssh-store.cc
View file

@ -3,6 +3,7 @@
#include "remote-store.hh"
#include "serve-protocol.hh"
#include "store-api.hh"
#include "path-with-outputs.hh"
#include "worker-protocol.hh"
#include "ssh.hh"
#include "derivations.hh"
@ -266,14 +267,23 @@ public:
return status;
}
void buildPaths(const std::vector<StorePathWithOutputs> & drvPaths, BuildMode buildMode) override
void buildPaths(const std::vector<DerivedPath> & drvPaths, BuildMode buildMode) override
{
auto conn(connections->get());
conn->to << cmdBuildPaths;
Strings ss;
for (auto & p : drvPaths)
ss.push_back(p.to_string(*this));
for (auto & p : drvPaths) {
auto sOrDrvPath = StorePathWithOutputs::tryFromDerivedPath(p);
std::visit(overloaded {
[&](StorePathWithOutputs s) {
ss.push_back(s.to_string(*this));
},
[&](StorePath drvPath) {
throw Error("wanted to fetch '%s' but the legacy ssh protocol doesn't support merely substituting drv files via the build paths command. It would build them instead. Try using ssh-ng://", printStorePath(drvPath));
},
}, sOrDrvPath);
}
conn->to << ss;
putBuildSettings(*conn);

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

@ -2,6 +2,8 @@
#include "globals.hh"
#include "nar-info-disk-cache.hh"
#include <atomic>
namespace nix {
struct LocalBinaryCacheStoreConfig : virtual BinaryCacheStoreConfig
@ -50,7 +52,8 @@ protected:
const std::string & mimeType) override
{
auto path2 = binaryCacheDir + "/" + path;
Path tmp = path2 + ".tmp." + std::to_string(getpid());
static std::atomic<int> counter{0};
Path tmp = fmt("%s.tmp.%d.%d", path2, getpid(), ++counter);
AutoDelete del(tmp, false);
StreamToSourceAdapter source(istream);
writeFile(tmp, source);
@ -90,7 +93,7 @@ protected:
void LocalBinaryCacheStore::init()
{
createDirs(binaryCacheDir + "/nar");
createDirs(binaryCacheDir + realisationsPrefix);
createDirs(binaryCacheDir + "/" + realisationsPrefix);
if (writeDebugInfo)
createDirs(binaryCacheDir + "/debuginfo");
BinaryCacheStore::init();

5
src/libstore/local-fs-store.hh
View file

@ -18,6 +18,9 @@ struct LocalFSStoreConfig : virtual StoreConfig
const PathSetting logDir{(StoreConfig*) this, false,
rootDir != "" ? rootDir + "/nix/var/log/nix" : settings.nixLogDir,
"log", "directory where Nix will store state"};
const PathSetting realStoreDir{(StoreConfig*) this, false,
rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
"physical path to the Nix store"};
};
class LocalFSStore : public virtual LocalFSStoreConfig, public virtual Store
@ -34,7 +37,7 @@ public:
/* Register a permanent GC root. */
Path addPermRoot(const StorePath & storePath, const Path & gcRoot);
virtual Path getRealStoreDir() { return storeDir; }
virtual Path getRealStoreDir() { return realStoreDir; }
Path toRealPath(const Path & storePath) override
{

306
src/libstore/local-store.cc
View file

@ -53,12 +53,15 @@ struct LocalStore::State::Stmts {
SQLiteStmt InvalidatePath;
SQLiteStmt AddDerivationOutput;
SQLiteStmt RegisterRealisedOutput;
SQLiteStmt UpdateRealisedOutput;
SQLiteStmt QueryValidDerivers;
SQLiteStmt QueryDerivationOutputs;
SQLiteStmt QueryRealisedOutput;
SQLiteStmt QueryAllRealisedOutputs;
SQLiteStmt QueryPathFromHashPart;
SQLiteStmt QueryValidPaths;
SQLiteStmt QueryRealisationReferences;
SQLiteStmt AddRealisationReference;
};
int getSchema(Path schemaPath)
@ -76,7 +79,7 @@ int getSchema(Path schemaPath)
void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
{
const int nixCASchemaVersion = 1;
const int nixCASchemaVersion = 2;
int curCASchema = getSchema(schemaPath);
if (curCASchema != nixCASchemaVersion) {
if (curCASchema > nixCASchemaVersion) {
@ -94,7 +97,39 @@ void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
#include "ca-specific-schema.sql.gen.hh"
;
db.exec(schema);
curCASchema = nixCASchemaVersion;
}
if (curCASchema < 2) {
SQLiteTxn txn(db);
// Ugly little sql dance to add a new `id` column and make it the primary key
db.exec(R"(
create table Realisations2 (
id integer primary key autoincrement not null,
drvPath text not null,
outputName text not null, -- symbolic output id, usually "out"
outputPath integer not null,
signatures text, -- space-separated list
foreign key (outputPath) references ValidPaths(id) on delete cascade
);
insert into Realisations2 (drvPath, outputName, outputPath, signatures)
select drvPath, outputName, outputPath, signatures from Realisations;
drop table Realisations;
alter table Realisations2 rename to Realisations;
)");
db.exec(R"(
create index if not exists IndexRealisations on Realisations(drvPath, outputName);
create table if not exists RealisationsRefs (
referrer integer not null,
realisationReference integer,
foreign key (referrer) references Realisations(id) on delete cascade,
foreign key (realisationReference) references Realisations(id) on delete restrict
);
)");
txn.commit();
}
writeFile(schemaPath, fmt("%d", nixCASchemaVersion));
lockFile(lockFd.get(), ltRead, true);
}
@ -106,9 +141,6 @@ LocalStore::LocalStore(const Params & params)
, LocalStoreConfig(params)
, Store(params)
, LocalFSStore(params)
, realStoreDir_{this, false, rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
"physical path to the Nix store"}
, realStoreDir(realStoreDir_)
, dbDir(stateDir + "/db")
, linksDir(realStoreDir + "/.links")
, reservedPath(dbDir + "/reserved")
@ -153,13 +185,13 @@ LocalStore::LocalStore(const Params & params)
printError("warning: the group '%1%' specified in 'build-users-group' does not exist", settings.buildUsersGroup);
else {
struct stat st;
if (stat(realStoreDir.c_str(), &st))
if (stat(realStoreDir.get().c_str(), &st))
throw SysError("getting attributes of path '%1%'", realStoreDir);
if (st.st_uid != 0 || st.st_gid != gr->gr_gid || (st.st_mode & ~S_IFMT) != perm) {
if (chown(realStoreDir.c_str(), 0, gr->gr_gid) == -1)
if (chown(realStoreDir.get().c_str(), 0, gr->gr_gid) == -1)
throw SysError("changing ownership of path '%1%'", realStoreDir);
if (chmod(realStoreDir.c_str(), perm) == -1)
if (chmod(realStoreDir.get().c_str(), perm) == -1)
throw SysError("changing permissions on path '%1%'", realStoreDir);
}
}
@ -310,13 +342,22 @@ LocalStore::LocalStore(const Params & params)
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
state->stmts->RegisterRealisedOutput.create(state->db,
R"(
insert or replace into Realisations (drvPath, outputName, outputPath)
values (?, ?, (select id from ValidPaths where path = ?))
insert or replace into Realisations (drvPath, outputName, outputPath, signatures)
values (?, ?, (select id from ValidPaths where path = ?), ?)
;
)");
state->stmts->UpdateRealisedOutput.create(state->db,
R"(
update Realisations
set signatures = ?
where
drvPath = ? and
outputName = ?
;
)");
state->stmts->QueryRealisedOutput.create(state->db,
R"(
select Output.path from Realisations
select Realisations.id, Output.path, Realisations.signatures from Realisations
inner join ValidPaths as Output on Output.id = Realisations.outputPath
where drvPath = ? and outputName = ?
;
@ -328,6 +369,19 @@ LocalStore::LocalStore(const Params & params)
where drvPath = ?
;
)");
state->stmts->QueryRealisationReferences.create(state->db,
R"(
select drvPath, outputName from Realisations
join RealisationsRefs on realisationReference = Realisations.id
where referrer = ?;
)");
state->stmts->AddRealisationReference.create(state->db,
R"(
insert or replace into RealisationsRefs (referrer, realisationReference)
values (
?,
(select id from Realisations where drvPath = ? and outputName = ?));
)");
}
}
@ -437,14 +491,14 @@ void LocalStore::makeStoreWritable()
if (getuid() != 0) return;
/* Check if /nix/store is on a read-only mount. */
struct statvfs stat;
if (statvfs(realStoreDir.c_str(), &stat) != 0)
if (statvfs(realStoreDir.get().c_str(), &stat) != 0)
throw SysError("getting info about the Nix store mount point");
if (stat.f_flag & ST_RDONLY) {
if (unshare(CLONE_NEWNS) == -1)
throw SysError("setting up a private mount namespace");
if (mount(0, realStoreDir.c_str(), "none", MS_REMOUNT | MS_BIND, 0) == -1)
if (mount(0, realStoreDir.get().c_str(), "none", MS_REMOUNT | MS_BIND, 0) == -1)
throw SysError("remounting %1% writable", realStoreDir);
}
#endif
@ -652,17 +706,66 @@ void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivat
}
}
void LocalStore::registerDrvOutput(const Realisation & info, CheckSigsFlag checkSigs)
{
settings.requireExperimentalFeature("ca-derivations");
if (checkSigs == NoCheckSigs || !realisationIsUntrusted(info))
registerDrvOutput(info);
else
throw Error("cannot register realisation '%s' because it lacks a valid signature", info.outPath.to_string());
}
void LocalStore::registerDrvOutput(const Realisation & info)
{
settings.requireExperimentalFeature("ca-derivations");
auto state(_state.lock());
retrySQLite<void>([&]() {
state->stmts->RegisterRealisedOutput.use()
(info.id.strHash())
(info.id.outputName)
(printStorePath(info.outPath))
.exec();
auto state(_state.lock());
if (auto oldR = queryRealisation_(*state, info.id)) {
if (info.isCompatibleWith(*oldR)) {
auto combinedSignatures = oldR->signatures;
combinedSignatures.insert(info.signatures.begin(),
info.signatures.end());
state->stmts->UpdateRealisedOutput.use()
(concatStringsSep(" ", combinedSignatures))
(info.id.strHash())
(info.id.outputName)
.exec();
} else {
throw Error("Trying to register a realisation of '%s', but we already "
"have another one locally.\n"
"Local: %s\n"
"Remote: %s",
info.id.to_string(),
printStorePath(oldR->outPath),
printStorePath(info.outPath)
);
}
} else {
state->stmts->RegisterRealisedOutput.use()
(info.id.strHash())
(info.id.outputName)
(printStorePath(info.outPath))
(concatStringsSep(" ", info.signatures))
.exec();
}
uint64_t myId = state->db.getLastInsertedRowId();
for (auto & [outputId, depPath] : info.dependentRealisations) {
auto localRealisation = queryRealisationCore_(*state, outputId);
if (!localRealisation)
throw Error("unable to register the derivation '%s' as it "
"depends on the non existent '%s'",
info.id.to_string(), outputId.to_string());
if (localRealisation->second.outPath != depPath)
throw Error("unable to register the derivation '%s' as it "
"depends on a realisation of '%s' that doesn’t"
"match what we have locally",
info.id.to_string(), outputId.to_string());
state->stmts->AddRealisationReference.use()
(myId)
(outputId.strHash())
(outputId.outputName)
.exec();
}
});
}
@ -1102,15 +1205,20 @@ const PublicKeys & LocalStore::getPublicKeys()
return *state->publicKeys;
}
bool LocalStore::pathInfoIsTrusted(const ValidPathInfo & info)
bool LocalStore::pathInfoIsUntrusted(const ValidPathInfo & info)
{
return requireSigs && !info.checkSignatures(*this, getPublicKeys());
}
bool LocalStore::realisationIsUntrusted(const Realisation & realisation)
{
return requireSigs && !realisation.checkSignatures(getPublicKeys());
}
void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
RepairFlag repair, CheckSigsFlag checkSigs)
{
if (checkSigs && pathInfoIsTrusted(info))
if (checkSigs && pathInfoIsUntrusted(info))
throw Error("cannot add path '%s' because it lacks a valid signature", printStorePath(info.path));
addTempRoot(info.path);
@ -1138,17 +1246,13 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
/* While restoring the path from the NAR, compute the hash
of the NAR. */
std::unique_ptr<AbstractHashSink> hashSink;
if (!info.ca.has_value() || !info.references.count(info.path))
hashSink = std::make_unique<HashSink>(htSHA256);
else
hashSink = std::make_unique<HashModuloSink>(htSHA256, std::string(info.path.hashPart()));
HashSink hashSink(htSHA256);
TeeSource wrapperSource { source, *hashSink };
TeeSource wrapperSource { source, hashSink };
restorePath(realPath, wrapperSource);
auto hashResult = hashSink->finish();
auto hashResult = hashSink.finish();
if (hashResult.first != info.narHash)
throw Error("hash mismatch importing path '%s';\n specified: %s\n got: %s",
@ -1158,6 +1262,31 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
throw Error("size mismatch importing path '%s';\n specified: %s\n got: %s",
printStorePath(info.path), info.narSize, hashResult.second);
if (info.ca) {
if (auto foHash = std::get_if<FixedOutputHash>(&*info.ca)) {
auto actualFoHash = hashCAPath(
foHash->method,
foHash->hash.type,
info.path
);
if (foHash->hash != actualFoHash.hash) {
throw Error("ca hash mismatch importing path '%s';\n specified: %s\n got: %s",
printStorePath(info.path),
foHash->hash.to_string(Base32, true),
actualFoHash.hash.to_string(Base32, true));
}
}
if (auto textHash = std::get_if<TextHash>(&*info.ca)) {
auto actualTextHash = hashString(htSHA256, readFile(realPath));
if (textHash->hash != actualTextHash) {
throw Error("ca hash mismatch importing path '%s';\n specified: %s\n got: %s",
printStorePath(info.path),
textHash->hash.to_string(Base32, true),
actualTextHash.to_string(Base32, true));
}
}
}
autoGC();
canonicalisePathMetaData(realPath, -1);
@ -1426,14 +1555,10 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
/* Check the content hash (optionally - slow). */
printMsg(lvlTalkative, "checking contents of '%s'", printStorePath(i));
std::unique_ptr<AbstractHashSink> hashSink;
if (!info->ca || !info->references.count(info->path))
hashSink = std::make_unique<HashSink>(info->narHash.type);
else
hashSink = std::make_unique<HashModuloSink>(info->narHash.type, std::string(info->path.hashPart()));
auto hashSink = HashSink(info->narHash.type);
dumpPath(Store::toRealPath(i), *hashSink);
auto current = hashSink->finish();
dumpPath(Store::toRealPath(i), hashSink);
auto current = hashSink.finish();
if (info->narHash != nullHash && info->narHash != current.first) {
printError("path '%s' was modified! expected hash '%s', got '%s'",
@ -1612,6 +1737,18 @@ void LocalStore::addSignatures(const StorePath & storePath, const StringSet & si
}
void LocalStore::signRealisation(Realisation & realisation)
{
// FIXME: keep secret keys in memory.
auto secretKeyFiles = settings.secretKeyFiles;
for (auto & secretKeyFile : secretKeyFiles.get()) {
SecretKey secretKey(readFile(secretKeyFile));
realisation.sign(secretKey);
}
}
void LocalStore::signPathInfo(ValidPathInfo & info)
{
// FIXME: keep secret keys in memory.
@ -1639,18 +1776,97 @@ void LocalStore::createUser(const std::string & userName, uid_t userId)
}
}
std::optional<const Realisation> LocalStore::queryRealisation(
const DrvOutput& id) {
typedef std::optional<const Realisation> Ret;
return retrySQLite<Ret>([&]() -> Ret {
std::optional<std::pair<int64_t, Realisation>> LocalStore::queryRealisationCore_(
LocalStore::State & state,
const DrvOutput & id)
{
auto useQueryRealisedOutput(
state.stmts->QueryRealisedOutput.use()
(id.strHash())
(id.outputName));
if (!useQueryRealisedOutput.next())
return std::nullopt;
auto realisationDbId = useQueryRealisedOutput.getInt(0);
auto outputPath = parseStorePath(useQueryRealisedOutput.getStr(1));
auto signatures =
tokenizeString<StringSet>(useQueryRealisedOutput.getStr(2));
return {{
realisationDbId,
Realisation{
.id = id,
.outPath = outputPath,
.signatures = signatures,
}
}};
}
std::optional<const Realisation> LocalStore::queryRealisation_(
LocalStore::State & state,
const DrvOutput & id)
{
auto maybeCore = queryRealisationCore_(state, id);
if (!maybeCore)
return std::nullopt;
auto [realisationDbId, res] = *maybeCore;
std::map<DrvOutput, StorePath> dependentRealisations;
auto useRealisationRefs(
state.stmts->QueryRealisationReferences.use()
(realisationDbId));
while (useRealisationRefs.next()) {
auto depId = DrvOutput {
Hash::parseAnyPrefixed(useRealisationRefs.getStr(0)),
useRealisationRefs.getStr(1),
};
auto dependentRealisation = queryRealisationCore_(state, depId);
assert(dependentRealisation); // Enforced by the db schema
auto outputPath = dependentRealisation->second.outPath;
dependentRealisations.insert({depId, outputPath});
}
res.dependentRealisations = dependentRealisations;
return { res };
}
std::optional<const Realisation>
LocalStore::queryRealisation(const DrvOutput & id)
{
return retrySQLite<std::optional<const Realisation>>([&]() {
auto state(_state.lock());
auto use(state->stmts->QueryRealisedOutput.use()(id.strHash())(
id.outputName));
if (!use.next())
return std::nullopt;
auto outputPath = parseStorePath(use.getStr(0));
return Ret{
Realisation{.id = id, .outPath = outputPath}};
return queryRealisation_(*state, id);
});
}
FixedOutputHash LocalStore::hashCAPath(
const FileIngestionMethod & method, const HashType & hashType,
const StorePath & path)
{
return hashCAPath(method, hashType, Store::toRealPath(path), path.hashPart());
}
FixedOutputHash LocalStore::hashCAPath(
const FileIngestionMethod & method,
const HashType & hashType,
const Path & path,
const std::string_view pathHash
)
{
HashModuloSink caSink ( hashType, std::string(pathHash) );
switch (method) {
case FileIngestionMethod::Recursive:
dumpPath(path, caSink);
break;
case FileIngestionMethod::Flat:
readFile(path, caSink);
break;
}
auto hash = caSink.finish().first;
return FixedOutputHash{
.method = method,
.hash = hash,
};
}
} // namespace nix

29
src/libstore/local-store.hh
View file

@ -83,9 +83,6 @@ private:
public:
PathSetting realStoreDir_;
const Path realStoreDir;
const Path dbDir;
const Path linksDir;
const Path reservedPath;
@ -136,7 +133,8 @@ public:
void querySubstitutablePathInfos(const StorePathCAMap & paths,
SubstitutablePathInfos & infos) override;
bool pathInfoIsTrusted(const ValidPathInfo &) override;
bool pathInfoIsUntrusted(const ValidPathInfo &) override;
bool realisationIsUntrusted(const Realisation & ) override;
void addToStore(const ValidPathInfo & info, Source & source,
RepairFlag repair, CheckSigsFlag checkSigs) override;
@ -202,8 +200,11 @@ public:
/* Register the store path 'output' as the output named 'outputName' of
derivation 'deriver'. */
void registerDrvOutput(const Realisation & info) override;
void registerDrvOutput(const Realisation & info, CheckSigsFlag checkSigs) override;
void cacheDrvOutputMapping(State & state, const uint64_t deriver, const string & outputName, const StorePath & output);
std::optional<const Realisation> queryRealisation_(State & state, const DrvOutput & id);
std::optional<std::pair<int64_t, Realisation>> queryRealisationCore_(State & state, const DrvOutput & id);
std::optional<const Realisation> queryRealisation(const DrvOutput&) override;
private:
@ -272,16 +273,30 @@ private:
bool isValidPath_(State & state, const StorePath & path);
void queryReferrers(State & state, const StorePath & path, StorePathSet & referrers);
/* Add signatures to a ValidPathInfo using the secret keys
/* Add signatures to a ValidPathInfo or Realisation using the secret keys
specified by the ‘secret-key-files’ option. */
void signPathInfo(ValidPathInfo & info);
Path getRealStoreDir() override { return realStoreDir; }
void signRealisation(Realisation &);
void createUser(const std::string & userName, uid_t userId) override;
// XXX: Make a generic `Store` method
FixedOutputHash hashCAPath(
const FileIngestionMethod & method,
const HashType & hashType,
const StorePath & path);
FixedOutputHash hashCAPath(
const FileIngestionMethod & method,
const HashType & hashType,
const Path & path,
const std::string_view pathHash
);
friend struct LocalDerivationGoal;
friend struct PathSubstitutionGoal;
friend struct SubstitutionGoal;
friend struct DerivationGoal;
};

2
src/libstore/local.mk
View file

@ -9,7 +9,7 @@ libstore_SOURCES := $(wildcard $(d)/*.cc $(d)/builtins/*.cc $(d)/build/*.cc)
libstore_LIBS = libutil
libstore_LDFLAGS = $(SQLITE3_LIBS) -lbz2 $(LIBCURL_LIBS) $(SODIUM_LIBS) -pthread
ifneq ($(OS), FreeBSD)
ifeq ($(OS), Linux)
libstore_LDFLAGS += -ldl
endif

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