Merge remote-tracking branch 'upstream/master' into ca-drv-exotic

This commit is contained in:
John Ericson 2023-04-17 10:16:57 -04:00
commit e12efa3654
246 changed files with 5067 additions and 1911 deletions

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@ -23,6 +23,7 @@ Maintainers: tick if completed or explain if not relevant
- unit tests - `src/*/tests` - unit tests - `src/*/tests`
- integration tests - `tests/nixos/*` - integration tests - `tests/nixos/*`
- [ ] documentation in the manual - [ ] documentation in the manual
- [ ] documentation in the internal API docs
- [ ] code and comments are self-explanatory - [ ] code and comments are self-explanatory
- [ ] commit message explains why the change was made - [ ] commit message explains why the change was made
- [ ] new feature or incompatible change: updated release notes - [ ] new feature or incompatible change: updated release notes

17
.github/labeler.yml vendored
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@ -2,5 +2,22 @@
- doc/manual/* - doc/manual/*
- src/nix/**/*.md - src/nix/**/*.md
"store":
- src/libstore/store-api.*
- src/libstore/*-store.*
"fetching":
- src/libfetchers/**/*
"repl":
- src/libcmd/repl.*
- src/nix/repl.*
"new-cli":
- src/nix/**/*
"tests": "tests":
# Unit tests
- src/*/tests/**/*
# Functional and integration tests
- tests/**/* - tests/**/*

3
.gitignore vendored
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@ -19,9 +19,12 @@ perl/Makefile.config
/doc/manual/nix.json /doc/manual/nix.json
/doc/manual/conf-file.json /doc/manual/conf-file.json
/doc/manual/builtins.json /doc/manual/builtins.json
/doc/manual/xp-features.json
/doc/manual/src/SUMMARY.md /doc/manual/src/SUMMARY.md
/doc/manual/src/command-ref/new-cli /doc/manual/src/command-ref/new-cli
/doc/manual/src/command-ref/conf-file.md /doc/manual/src/command-ref/conf-file.md
/doc/manual/src/command-ref/experimental-features-shortlist.md
/doc/manual/src/contributing/experimental-feature-descriptions.md
/doc/manual/src/language/builtins.md /doc/manual/src/language/builtins.md
# /scripts/ # /scripts/

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@ -1 +1 @@
2.15.0 2.16.0

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@ -1,8 +1,8 @@
diff --git a/darwin_stop_world.c b/darwin_stop_world.c diff --git a/darwin_stop_world.c b/darwin_stop_world.c
index 3dbaa3fb..36a1d1f7 100644 index 0468aaec..b348d869 100644
--- a/darwin_stop_world.c --- a/darwin_stop_world.c
+++ b/darwin_stop_world.c +++ b/darwin_stop_world.c
@@ -352,6 +352,7 @@ GC_INNER void GC_push_all_stacks(void) @@ -356,6 +356,7 @@ GC_INNER void GC_push_all_stacks(void)
int nthreads = 0; int nthreads = 0;
word total_size = 0; word total_size = 0;
mach_msg_type_number_t listcount = (mach_msg_type_number_t)THREAD_TABLE_SZ; mach_msg_type_number_t listcount = (mach_msg_type_number_t)THREAD_TABLE_SZ;
@ -10,7 +10,7 @@ index 3dbaa3fb..36a1d1f7 100644
if (!EXPECT(GC_thr_initialized, TRUE)) if (!EXPECT(GC_thr_initialized, TRUE))
GC_thr_init(); GC_thr_init();
@@ -407,6 +408,19 @@ GC_INNER void GC_push_all_stacks(void) @@ -411,6 +412,19 @@ GC_INNER void GC_push_all_stacks(void)
GC_push_all_stack_sections(lo, hi, p->traced_stack_sect); GC_push_all_stack_sections(lo, hi, p->traced_stack_sect);
} }
if (altstack_lo) { if (altstack_lo) {
@ -30,6 +30,22 @@ index 3dbaa3fb..36a1d1f7 100644
total_size += altstack_hi - altstack_lo; total_size += altstack_hi - altstack_lo;
GC_push_all_stack(altstack_lo, altstack_hi); GC_push_all_stack(altstack_lo, altstack_hi);
} }
diff --git a/include/gc.h b/include/gc.h
index edab6c22..f2c61282 100644
--- a/include/gc.h
+++ b/include/gc.h
@@ -2172,6 +2172,11 @@ GC_API void GC_CALL GC_win32_free_heap(void);
(*GC_amiga_allocwrapper_do)(a,GC_malloc_atomic_ignore_off_page)
#endif /* _AMIGA && !GC_AMIGA_MAKINGLIB */
+#if !__APPLE__
+/* Patch doesn't work on apple */
+#define NIX_BOEHM_PATCH_VERSION 1
+#endif
+
#ifdef __cplusplus
} /* extern "C" */
#endif
diff --git a/pthread_stop_world.c b/pthread_stop_world.c diff --git a/pthread_stop_world.c b/pthread_stop_world.c
index b5d71e62..aed7b0bf 100644 index b5d71e62..aed7b0bf 100644
--- a/pthread_stop_world.c --- a/pthread_stop_world.c

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@ -184,7 +184,7 @@ fi
# Look for OpenSSL, a required dependency. FIXME: this is only (maybe) # Look for OpenSSL, a required dependency. FIXME: this is only (maybe)
# used by S3BinaryCacheStore. # used by S3BinaryCacheStore.
PKG_CHECK_MODULES([OPENSSL], [libcrypto], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"]) PKG_CHECK_MODULES([OPENSSL], [libcrypto >= 1.1.1], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"])
# Look for libarchive. # Look for libarchive.
@ -289,13 +289,24 @@ PKG_CHECK_MODULES([GTEST], [gtest_main])
# Look for rapidcheck. # Look for rapidcheck.
AC_ARG_VAR([RAPIDCHECK_HEADERS], [include path of gtest headers shipped by RAPIDCHECK])
# No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302 # No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302
AC_LANG_PUSH(C++) AC_LANG_PUSH(C++)
AC_SUBST(RAPIDCHECK_HEADERS) AC_SUBST(RAPIDCHECK_HEADERS)
[CXXFLAGS="-I $RAPIDCHECK_HEADERS $CXXFLAGS"] [CXXFLAGS="-I $RAPIDCHECK_HEADERS $CXXFLAGS"]
[LIBS="-lrapidcheck -lgtest $LIBS"]
AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>]) AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>])
dnl No good for C++ libs with mangled symbols dnl AC_CHECK_LIB doesn't work for C++ libs with mangled symbols
dnl AC_CHECK_LIB([rapidcheck], []) AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <gtest/gtest.h>
#include <rapidcheck/gtest.h>
]], [[
return RUN_ALL_TESTS();
]])
],
[],
[AC_MSG_ERROR([librapidcheck is not found.])])
AC_LANG_POP(C++) AC_LANG_POP(C++)
fi fi

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@ -10,7 +10,9 @@ let
result = '' result = ''
> **Warning** \ > **Warning** \
> This program is **experimental** and its interface is subject to change. > This program is
> [**experimental**](@docroot@/contributing/experimental-features.md#xp-feature-nix-command)
> and its interface is subject to change.
# Name # Name
@ -29,19 +31,18 @@ let
showSynopsis = command: args: showSynopsis = command: args:
let let
showArgument = arg: "*${arg.label}*" + (if arg ? arity then "" else "..."); showArgument = arg: "*${arg.label}*" + optionalString (! arg ? arity) "...";
arguments = concatStringsSep " " (map showArgument args); arguments = concatStringsSep " " (map showArgument args);
in '' in ''
`${command}` [*option*...] ${arguments} `${command}` [*option*...] ${arguments}
''; '';
maybeSubcommands = if details ? commands && details.commands != {} maybeSubcommands = optionalString (details ? commands && details.commands != {})
then '' ''
where *subcommand* is one of the following: where *subcommand* is one of the following:
${subcommands} ${subcommands}
'' '';
else "";
subcommands = if length categories > 1 subcommands = if length categories > 1
then listCategories then listCategories
@ -63,12 +64,11 @@ let
* [`${command} ${name}`](./${appendName filename name}.md) - ${subcmd.description} * [`${command} ${name}`](./${appendName filename name}.md) - ${subcmd.description}
''; '';
maybeDocumentation = maybeDocumentation = optionalString
if details ? doc (details ? doc)
then replaceStrings ["@stores@"] [storeDocs] details.doc (replaceStrings ["@stores@"] [storeDocs] details.doc);
else "";
maybeOptions = if details.flags == {} then "" else '' maybeOptions = optionalString (details.flags != {}) ''
# Options # Options
${showOptions details.flags toplevel.flags} ${showOptions details.flags toplevel.flags}
@ -78,15 +78,19 @@ let
let let
allOptions = options // commonOptions; allOptions = options // commonOptions;
showCategory = cat: '' showCategory = cat: ''
${if cat != "" then "**${cat}:**" else ""} ${optionalString (cat != "") "**${cat}:**"}
${listOptions (filterAttrs (n: v: v.category == cat) allOptions)} ${listOptions (filterAttrs (n: v: v.category == cat) allOptions)}
''; '';
listOptions = opts: concatStringsSep "\n" (attrValues (mapAttrs showOption opts)); listOptions = opts: concatStringsSep "\n" (attrValues (mapAttrs showOption opts));
showOption = name: option: showOption = name: option:
let let
shortName = if option ? shortName then "/ `-${option.shortName}`" else ""; shortName = optionalString
labels = if option ? labels then (concatStringsSep " " (map (s: "*${s}*") option.labels)) else ""; (option ? shortName)
("/ `-${option.shortName}`");
labels = optionalString
(option ? labels)
(concatStringsSep " " (map (s: "*${s}*") option.labels));
in trim '' in trim ''
- `--${name}` ${shortName} ${labels} - `--${name}` ${shortName} ${labels}

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@ -0,0 +1,9 @@
with builtins;
with import ./utils.nix;
let
showExperimentalFeature = name: doc:
''
- [`${name}`](@docroot@/contributing/experimental-features.md#xp-feature-${name})
'';
in xps: indent " " (concatStrings (attrValues (mapAttrs showExperimentalFeature xps)))

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@ -0,0 +1,11 @@
with builtins;
with import ./utils.nix;
let
showExperimentalFeature = name: doc:
squash ''
## [`${name}`]{#xp-feature-${name}}
${doc}
'';
in xps: (concatStringsSep "\n" (attrValues (mapAttrs showExperimentalFeature xps)))

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@ -81,19 +81,20 @@ $(d)/%.8: $(d)/src/command-ref/%.md
$(d)/nix.conf.5: $(d)/src/command-ref/conf-file.md $(d)/nix.conf.5: $(d)/src/command-ref/conf-file.md
@printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp @printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp
@cat $^ >> $^.tmp @cat $^ >> $^.tmp
@$(call process-includes,$^,$^.tmp)
$(trace-gen) lowdown -sT man --nroff-nolinks -M section=5 $^.tmp -o $@ $(trace-gen) lowdown -sT man --nroff-nolinks -M section=5 $^.tmp -o $@
@rm $^.tmp @rm $^.tmp
$(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli $(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli $(d)/src/contributing/experimental-feature-descriptions.md
@cp $< $@ @cp $< $@
@$(call process-includes,$@,$@) @$(call process-includes,$@,$@)
$(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/generate-manpage.nix $(bindir)/nix $(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/utils.nix $(d)/generate-manpage.nix $(bindir)/nix
@rm -rf $@ $@.tmp @rm -rf $@ $@.tmp
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix (builtins.readFile $<)' $(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix (builtins.readFile $<)'
@mv $@.tmp $@ @mv $@.tmp $@
$(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/utils.nix $(d)/src/command-ref/conf-file-prefix.md $(bindir)/nix $(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/utils.nix $(d)/src/command-ref/conf-file-prefix.md $(d)/src/command-ref/experimental-features-shortlist.md $(bindir)/nix
@cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp @cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp
$(trace-gen) $(nix-eval) --expr '(import doc/manual/utils.nix).showSettings { useAnchors = true; } (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp; $(trace-gen) $(nix-eval) --expr '(import doc/manual/utils.nix).showSettings { useAnchors = true; } (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp;
@mv $@.tmp $@ @mv $@.tmp $@
@ -106,6 +107,20 @@ $(d)/conf-file.json: $(bindir)/nix
$(trace-gen) $(dummy-env) $(bindir)/nix show-config --json --experimental-features nix-command > $@.tmp $(trace-gen) $(dummy-env) $(bindir)/nix show-config --json --experimental-features nix-command > $@.tmp
@mv $@.tmp $@ @mv $@.tmp $@
$(d)/src/contributing/experimental-feature-descriptions.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features.nix $(bindir)/nix
@rm -rf $@ $@.tmp
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-xp-features.nix (builtins.fromJSON (builtins.readFile $<))'
@mv $@.tmp $@
$(d)/src/command-ref/experimental-features-shortlist.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features-shortlist.nix $(bindir)/nix
@rm -rf $@ $@.tmp
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-xp-features-shortlist.nix (builtins.fromJSON (builtins.readFile $<))'
@mv $@.tmp $@
$(d)/xp-features.json: $(bindir)/nix
$(trace-gen) $(dummy-env) NIX_PATH=nix/corepkgs=corepkgs $(bindir)/nix __dump-xp-features > $@.tmp
@mv $@.tmp $@
$(d)/src/language/builtins.md: $(d)/builtins.json $(d)/generate-builtins.nix $(d)/src/language/builtins-prefix.md $(bindir)/nix $(d)/src/language/builtins.md: $(d)/builtins.json $(d)/generate-builtins.nix $(d)/src/language/builtins-prefix.md $(bindir)/nix
@cat doc/manual/src/language/builtins-prefix.md > $@.tmp @cat doc/manual/src/language/builtins-prefix.md > $@.tmp
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp; $(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp;
@ -145,7 +160,7 @@ doc/manual/generated/man1/nix3-manpages: $(d)/src/command-ref/new-cli
done done
@touch $@ @touch $@
$(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/anchors.jq $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/command-ref/conf-file.md $(d)/src/language/builtins.md $(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/anchors.jq $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/contributing/experimental-feature-descriptions.md $(d)/src/command-ref/conf-file.md $(d)/src/language/builtins.md
$(trace-gen) \ $(trace-gen) \
tmp="$$(mktemp -d)"; \ tmp="$$(mktemp -d)"; \
cp -r doc/manual "$$tmp"; \ cp -r doc/manual "$$tmp"; \

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@ -95,9 +95,11 @@
- [Glossary](glossary.md) - [Glossary](glossary.md)
- [Contributing](contributing/contributing.md) - [Contributing](contributing/contributing.md)
- [Hacking](contributing/hacking.md) - [Hacking](contributing/hacking.md)
- [Experimental Features](contributing/experimental-features.md)
- [CLI guideline](contributing/cli-guideline.md) - [CLI guideline](contributing/cli-guideline.md)
- [Release Notes](release-notes/release-notes.md) - [Release Notes](release-notes/release-notes.md)
- [Release X.Y (202?-??-??)](release-notes/rl-next.md) - [Release X.Y (202?-??-??)](release-notes/rl-next.md)
- [Release 2.15 (2023-04-11)](release-notes/rl-2.15.md)
- [Release 2.14 (2023-02-28)](release-notes/rl-2.14.md) - [Release 2.14 (2023-02-28)](release-notes/rl-2.14.md)
- [Release 2.13 (2023-01-17)](release-notes/rl-2.13.md) - [Release 2.13 (2023-01-17)](release-notes/rl-2.13.md)
- [Release 2.12 (2022-12-06)](release-notes/rl-2.12.md) - [Release 2.12 (2022-12-06)](release-notes/rl-2.12.md)

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@ -1,6 +1,6 @@
# Experimental Commands # Experimental Commands
This section lists experimental commands. This section lists [experimental commands](@docroot@/contributing/experimental-features.md#xp-feature-nix-command).
> **Warning** > **Warning**
> >

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@ -120,7 +120,8 @@ shell in which to build it:
```console ```console
$ nix-shell '<nixpkgs>' -A pan $ nix-shell '<nixpkgs>' -A pan
[nix-shell]$ eval ${unpackPhase:-unpackPhase} [nix-shell]$ eval ${unpackPhase:-unpackPhase}
[nix-shell]$ cd pan-* [nix-shell]$ cd $sourceRoot
[nix-shell]$ eval ${patchPhase:-patchPhase}
[nix-shell]$ eval ${configurePhase:-configurePhase} [nix-shell]$ eval ${configurePhase:-configurePhase}
[nix-shell]$ eval ${buildPhase:-buildPhase} [nix-shell]$ eval ${buildPhase:-buildPhase}
[nix-shell]$ ./pan/gui/pan [nix-shell]$ ./pan/gui/pan

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@ -0,0 +1,95 @@
This section describes the notion of *experimental features*, and how it fits into the big picture of the development of Nix.
# What are experimental features?
Experimental features are considered unstable, which means that they can be changed or removed at any time.
Users must explicitly enable them by toggling the associated [experimental feature flags](@docroot@/command-ref/conf-file.md#conf-experimental-features).
This allows accessing unstable functionality without unwittingly relying on it.
Experimental feature flags were first introduced in [Nix 2.4](@docroot@/release-notes/rl-2.4.md).
Before that, Nix did have experimental features, but they were not guarded by flags and were merely documented as unstable.
This was a source of confusion and controversy.
# When should a new feature be marked experimental?
A change in the Nix codebase should be guarded by an experimental feature flag if it is considered likely to be reverted or adapted in a backwards-incompatible manner after gathering more experience with it in practice.
Examples:
- Changes to the Nix language, such as new built-ins, syntactic or semantic changes, etc.
- Changes to the command-line interface
# Lifecycle of an experimental feature
Experimental features have to be treated on a case-by-case basis.
However, the standard workflow for an experimental feature is as follows:
- A new feature is implemented in a *pull request*
- It is guarded by an experimental feature flag that is disabled by default
- The pull request is merged, the *experimental* feature ends up in a release
- Using the feature requires explicitly enabling it, signifying awareness of the potential risks
- Being experimental, the feature can still be changed arbitrarily
- The feature can be *removed*
- The associated experimental feature flag is also removed
- The feature can be declared *stable*
- The associated experimental feature flag is removed
- There should be enough evidence of users having tried the feature, such as feedback, fixed bugs, demonstrations of how it is put to use
- Maintainers must feel confident that:
- The feature is designed and implemented sensibly, that it is fit for purpose
- Potential interactions are well-understood
- Stabilising the feature will not incur an outsized maintenance burden in the future
The following diagram illustrates the process:
```
.------.
| idea |
'------'
|
discussion, design, implementation
|
| .-------.
| | |
v v |
.--------------. review
| pull request | |
'--------------' |
| ^ | |
| | '-------'
.---' '----.
| |
merge user feedback,
| (breaking) changes
| |
'---. .----'
| |
v |
+--------------+
.---| experimental |----.
| +--------------+ |
| |
decision to stabilise decision against
| keeping the feature
| |
v v
+--------+ +---------+
| stable | | removed |
+--------+ +---------+
```
# Relation to the RFC process
Experimental features and [RFCs](https://github.com/NixOS/rfcs/) both allow approaching substantial changes while minimizing the risk.
However they serve different purposes:
- An experimental feature enables developers to iterate on and deliver a new idea without committing to it or requiring a costly long-running fork.
It is primarily an issue of *implementation*, targeting Nix developers and early testers.
- The goal of an RFC is to make explicit all the implications of a change:
Explain why it is wanted, which new use-cases it enables, which interface changes it requires, etc.
It is primarily an issue of *design* and *communication*, targeting the broader community.
This means that experimental features and RFCs are orthogonal mechanisms, and can be used independently or together as needed.
# Currently available experimental features
{{#include ./experimental-feature-descriptions.md}}

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@ -15,7 +15,7 @@
Example: `/nix/store/g946hcz4c8mdvq2g8vxx42z51qb71rvp-git-2.38.1.drv` Example: `/nix/store/g946hcz4c8mdvq2g8vxx42z51qb71rvp-git-2.38.1.drv`
See [`nix show-derivation`](./command-ref/new-cli/nix3-show-derivation.md) (experimental) for displaying the contents of store derivations. See [`nix derivation show`](./command-ref/new-cli/nix3-derivation-show.md) (experimental) for displaying the contents of store derivations.
[store derivation]: #gloss-store-derivation [store derivation]: #gloss-store-derivation
@ -54,7 +54,7 @@
invoked, the Nix store can be referred to invoked, the Nix store can be referred to
as a "_local_" or a "_remote_" one: as a "_local_" or a "_remote_" one:
+ A *local store* exists on the filesystem of + A [local store]{#gloss-local-store} exists on the filesystem of
the machine where Nix is invoked. You can use other the machine where Nix is invoked. You can use other
local stores by passing the `--store` flag to the local stores by passing the `--store` flag to the
`nix` command. Local stores can be used for building derivations. `nix` command. Local stores can be used for building derivations.
@ -65,17 +65,17 @@
served by the `nix-serve` Perl script. served by the `nix-serve` Perl script.
[store]: #gloss-store [store]: #gloss-store
[local store]: #gloss-local-store
- [chroot store]{#gloss-chroot-store}\ - [chroot store]{#gloss-chroot-store}\
A local store whose canonical path is anything other than `/nix/store`. A [local store] whose canonical path is anything other than `/nix/store`.
- [binary cache]{#gloss-binary-cache}\ - [binary cache]{#gloss-binary-cache}\
A *binary cache* is a Nix store which uses a different format: its A *binary cache* is a Nix store which uses a different format: its
metadata and signatures are kept in `.narinfo` files rather than in a metadata and signatures are kept in `.narinfo` files rather than in a
Nix database. This different format simplifies serving store objects [Nix database]. This different format simplifies serving store objects
over the network, but cannot host builds. Examples of binary caches over the network, but cannot host builds. Examples of binary caches
include S3 buckets and the [NixOS binary include S3 buckets and the [NixOS binary cache](https://cache.nixos.org).
cache](https://cache.nixos.org).
- [store path]{#gloss-store-path}\ - [store path]{#gloss-store-path}\
The location of a [store object] in the file system, i.e., an The location of a [store object] in the file system, i.e., an
@ -108,7 +108,7 @@
[fixed-output derivations](#gloss-fixed-output-derivation). [fixed-output derivations](#gloss-fixed-output-derivation).
- [substitute]{#gloss-substitute}\ - [substitute]{#gloss-substitute}\
A substitute is a command invocation stored in the Nix database that A substitute is a command invocation stored in the [Nix database] that
describes how to build a store object, bypassing the normal build describes how to build a store object, bypassing the normal build
mechanism (i.e., derivations). Typically, the substitute builds the mechanism (i.e., derivations). Typically, the substitute builds the
store object by downloading a pre-built version of the store object store object by downloading a pre-built version of the store object
@ -127,6 +127,14 @@
builder can rely on external inputs such as the network or the builder can rely on external inputs such as the network or the
system time) but the Nix model assumes it. system time) but the Nix model assumes it.
- Nix database{#gloss-nix-database}\
An SQlite database to track [reference]s between [store object]s.
This is an implementation detail of the [local store].
Default location: `/nix/var/nix/db`.
[Nix database]: #gloss-nix-database
- [Nix expression]{#gloss-nix-expression}\ - [Nix expression]{#gloss-nix-expression}\
A high-level description of software packages and compositions A high-level description of software packages and compositions
thereof. Deploying software using Nix entails writing Nix thereof. Deploying software using Nix entails writing Nix
@ -175,9 +183,9 @@
- [validity]{#gloss-validity}\ - [validity]{#gloss-validity}\
A store path is valid if all [store object]s in its [closure] can be read from the [store]. A store path is valid if all [store object]s in its [closure] can be read from the [store].
For a local store, this means: For a [local store], this means:
- The store path leads to an existing [store object] in that [store]. - The store path leads to an existing [store object] in that [store].
- The store path is listed in the Nix database as being valid. - The store path is listed in the [Nix database] as being valid.
- All paths in the store path's [closure] are valid. - All paths in the store path's [closure] are valid.
[validity]: #gloss-validity [validity]: #gloss-validity
@ -217,3 +225,9 @@
[string]: ./language/values.md#type-string [string]: ./language/values.md#type-string
[path]: ./language/values.md#type-path [path]: ./language/values.md#type-path
[attribute name]: ./language/values.md#attribute-set [attribute name]: ./language/values.md#attribute-set
- [experimental feature]{#gloss-experimental-feature}\
Not yet stabilized functionality guarded by named experimental feature flags.
These flags are enabled or disabled with the [`experimental-features`](./command-ref/conf-file.html#conf-experimental-features) setting.
See the contribution guide on the [purpose and lifecycle of experimental feaures](@docroot@/contributing/experimental-features.md).

View file

@ -208,12 +208,26 @@ Derivations can declare some infrequently used optional attributes.
about converting to and from base-32 notation.) about converting to and from base-32 notation.)
- [`__contentAddressed`]{#adv-attr-__contentAddressed} - [`__contentAddressed`]{#adv-attr-__contentAddressed}
If this **experimental** attribute is set to true, then the derivation > **Warning**
> This attribute is part of an [experimental feature](@docroot@/contributing/experimental-features.md).
>
> To use this attribute, you must enable the
> [`ca-derivations`](@docroot@/contributing/experimental-features.md#xp-feature-ca-derivations) experimental feature.
> For example, in [nix.conf](../command-ref/conf-file.md) you could add:
>
> ```
> extra-experimental-features = ca-derivations
> ```
If this attribute is set to `true`, then the derivation
outputs will be stored in a content-addressed location rather than the outputs will be stored in a content-addressed location rather than the
traditional input-addressed one. traditional input-addressed one.
This only has an effect if the `ca-derivations` experimental feature is enabled.
Setting this attribute also requires setting `outputHashMode` and `outputHashAlgo` like for *fixed-output derivations* (see above). Setting this attribute also requires setting
[`outputHashMode`](#adv-attr-outputHashMode)
and
[`outputHashAlgo`](#adv-attr-outputHashAlgo)
like for *fixed-output derivations* (see above).
- [`passAsFile`]{#adv-attr-passAsFile}\ - [`passAsFile`]{#adv-attr-passAsFile}\
A list of names of attributes that should be passed via files rather A list of names of attributes that should be passed via files rather
@ -307,9 +321,11 @@ Derivations can declare some infrequently used optional attributes.
- [`unsafeDiscardReferences`]{#adv-attr-unsafeDiscardReferences}\ - [`unsafeDiscardReferences`]{#adv-attr-unsafeDiscardReferences}\
> **Warning** > **Warning**
> This is an experimental feature. > This attribute is part of an [experimental feature](@docroot@/contributing/experimental-features.md).
> >
> To enable it, add the following to [nix.conf](../command-ref/conf-file.md): > To use this attribute, you must enable the
> [`discard-references`](@docroot@/contributing/experimental-features.md#xp-feature-discard-references) experimental feature.
> For example, in [nix.conf](../command-ref/conf-file.md) you could add:
> >
> ``` > ```
> extra-experimental-features = discard-references > extra-experimental-features = discard-references

View file

@ -19,7 +19,7 @@ to subsequent chapters.
channel: channel:
```console ```console
$ nix-env -qaP $ nix-env --query --available --attr-path
nixpkgs.docbook_xml_dtd_43 docbook-xml-4.3 nixpkgs.docbook_xml_dtd_43 docbook-xml-4.3
nixpkgs.docbook_xml_dtd_45 docbook-xml-4.5 nixpkgs.docbook_xml_dtd_45 docbook-xml-4.5
nixpkgs.firefox firefox-33.0.2 nixpkgs.firefox firefox-33.0.2
@ -31,7 +31,7 @@ to subsequent chapters.
1. Install some packages from the channel: 1. Install some packages from the channel:
```console ```console
$ nix-env -iA nixpkgs.hello $ nix-env --install --attr nixpkgs.hello
``` ```
This should download pre-built packages; it should not build them This should download pre-built packages; it should not build them
@ -49,13 +49,13 @@ to subsequent chapters.
1. Uninstall a package: 1. Uninstall a package:
```console ```console
$ nix-env -e hello $ nix-env --uninstall hello
``` ```
1. You can also test a package without installing it: 1. You can also test a package without installing it:
```console ```console
$ nix-shell -p hello $ nix-shell --packages hello
``` ```
This builds or downloads GNU Hello and its dependencies, then drops This builds or downloads GNU Hello and its dependencies, then drops
@ -76,7 +76,7 @@ to subsequent chapters.
```console ```console
$ nix-channel --update nixpkgs $ nix-channel --update nixpkgs
$ nix-env -u '*' $ nix-env --upgrade '*'
``` ```
The latter command will upgrade each installed package for which The latter command will upgrade each installed package for which
@ -95,5 +95,5 @@ to subsequent chapters.
them: them:
```console ```console
$ nix-collect-garbage -d $ nix-collect-garbage --delete-old
``` ```

View file

@ -0,0 +1,58 @@
# Release 2.15 (2023-04-11)
* Commands which take installables on the command line can now read them from the standard input if
passed the `--stdin` flag. This is primarily useful when you have a large amount of paths which
exceed the OS argument limit.
* The `nix-hash` command now supports Base64 and SRI. Use the flags `--base64`
or `--sri` to specify the format of output hash as Base64 or SRI, and `--to-base64`
or `--to-sri` to convert a hash to Base64 or SRI format, respectively.
As the choice of hash formats is no longer binary, the `--base16` flag is also added
to explicitly specify the Base16 format, which is still the default.
* The special handling of an [installable](../command-ref/new-cli/nix.md#installables) with `.drv` suffix being interpreted as all of the given [store derivation](../glossary.md#gloss-store-derivation)'s output paths is removed, and instead taken as the literal store path that it represents.
The new `^` syntax for store paths introduced in Nix 2.13 allows explicitly referencing output paths of a derivation.
Using this is better and more clear than relying on the now-removed `.drv` special handling.
For example,
```shell-session
$ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv
```
now gives info about the derivation itself, while
```shell-session
$ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv^*
```
provides information about each of its outputs.
* The experimental command `nix describe-stores` has been removed.
* Nix stores and their settings are now documented in [`nix help-stores`](@docroot@/command-ref/new-cli/nix3-help-stores.md).
* Documentation for operations of `nix-store` and `nix-env` are now available on separate pages of the manual.
They include all common options that can be specified and common environment variables that affect these commands.
These pages can be viewed offline with `man` using
* `man nix-store-<operation>` and `man nix-env-<operation>`
* `nix-store --help --<operation>` and `nix-env --help --<operation>`.
* Nix when used as a client now checks whether the store (the server) trusts the client.
(The store always had to check whether it trusts the client, but now the client is informed of the store's decision.)
This is useful for scripting interactions with (non-legacy-ssh) remote Nix stores.
`nix store ping` and `nix doctor` now display this information.
* The new command `nix derivation add` allows adding derivations to the store without involving the Nix language.
It exists to round out our collection of basic utility/plumbing commands, and allow for a low barrier-to-entry way of experimenting with alternative front-ends to the Nix Store.
It uses the same JSON layout as `nix derivation show`, and is its inverse.
* `nix show-derivation` has been renamed to `nix derivation show`.
This matches `nix derivation add`, and avoids bloating the top-level namespace.
The old name is still kept as an alias for compatibility, however.
* The `nix derivation {add,show}` JSON format now includes the derivation name as a top-level field.
This is useful in general, but especially necessary for the `add` direction, as otherwise we would need to pass in the name out of band for certain cases.

View file

@ -1,41 +1,2 @@
# Release X.Y (202?-??-??) # Release X.Y (202?-??-??)
* Commands which take installables on the command line can now read them from the standard input if
passed the `--stdin` flag. This is primarily useful when you have a large amount of paths which
exceed the OS arg limit.
* The `nix-hash` command now supports Base64 and SRI. Use the flags `--base64`
or `--sri` to specify the format of output hash as Base64 or SRI, and `--to-base64`
or `--to-sri` to convert a hash to Base64 or SRI format, respectively.
As the choice of hash formats is no longer binary, the `--base16` flag is also added
to explicitly specify the Base16 format, which is still the default.
* The special handling of an [installable](../command-ref/new-cli/nix.md#installables) with `.drv` suffix being interpreted as all of the given [store derivation](../glossary.md#gloss-store-derivation)'s output paths is removed, and instead taken as the literal store path that it represents.
The new `^` syntax for store paths introduced in Nix 2.13 allows explicitly referencing output paths of a derivation.
Using this is better and more clear than relying on the now-removed `.drv` special handling.
For example,
```shell-session
$ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv
```
now gives info about the derivation itself, while
```shell-session
$ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv^*
```
provides information about each of its outputs.
* The experimental command `nix describe-stores` has been removed.
* Nix stores and their settings are now documented in [`nix help-stores`](@docroot@/command-ref/new-cli/nix3-help-stores.md).
* Documentation for operations of `nix-store` and `nix-env` are now available on separate pages of the manual.
They include all common options that can be specified and common environment variables that affect these commands.
These pages can be viewed offline with `man` using
* `man nix-store-<operation>` and `man nix-env-<operation>`
* `nix-store --help --<operation>` and `nix-env --help --<operation>`.

View file

@ -5,6 +5,9 @@ rec {
concatStrings = concatStringsSep ""; concatStrings = concatStringsSep "";
attrsToList = a:
map (name: { inherit name; value = a.${name}; }) (builtins.attrNames a);
replaceStringsRec = from: to: string: replaceStringsRec = from: to: string:
# recursively replace occurrences of `from` with `to` within `string` # recursively replace occurrences of `from` with `to` within `string`
# example: # example:
@ -39,7 +42,9 @@ rec {
filterAttrs = pred: set: filterAttrs = pred: set:
listToAttrs (concatMap (name: let v = set.${name}; in if pred name v then [(nameValuePair name v)] else []) (attrNames set)); listToAttrs (concatMap (name: let v = set.${name}; in if pred name v then [(nameValuePair name v)] else []) (attrNames set));
showSetting = { useAnchors }: name: { description, documentDefault, defaultValue, aliases, value }: optionalString = cond: string: if cond then string else "";
showSetting = { useAnchors }: name: { description, documentDefault, defaultValue, aliases, value, experimentalFeature }:
let let
result = squash '' result = squash ''
- ${if useAnchors - ${if useAnchors
@ -49,10 +54,28 @@ rec {
${indent " " body} ${indent " " body}
''; '';
experimentalFeatureNote = optionalString (experimentalFeature != null) ''
> **Warning**
> This setting is part of an
> [experimental feature](@docroot@/contributing/experimental-features.md).
To change this setting, you need to make sure the corresponding experimental feature,
[`${experimentalFeature}`](@docroot@/contributing/experimental-features.md#xp-feature-${experimentalFeature}),
is enabled.
For example, include the following in [`nix.conf`](#):
```
extra-experimental-features = ${experimentalFeature}
${name} = ...
```
'';
# separate body to cleanly handle indentation # separate body to cleanly handle indentation
body = '' body = ''
${description} ${description}
${experimentalFeatureNote}
**Default:** ${showDefault documentDefault defaultValue} **Default:** ${showDefault documentDefault defaultValue}
${showAliases aliases} ${showAliases aliases}
@ -71,13 +94,13 @@ rec {
else "*machine-specific*"; else "*machine-specific*";
showAliases = aliases: showAliases = aliases:
if aliases == [] then "" else optionalString (aliases != [])
"**Deprecated alias:** ${(concatStringsSep ", " (map (s: "`${s}`") aliases))}"; "**Deprecated alias:** ${(concatStringsSep ", " (map (s: "`${s}`") aliases))}";
in result;
indent = prefix: s: indent = prefix: s:
concatStringsSep "\n" (map (x: if x == "" then x else "${prefix}${x}") (splitLines s)); concatStringsSep "\n" (map (x: if x == "" then x else "${prefix}${x}") (splitLines s));
in result;
showSettings = args: settingsInfo: concatStrings (attrValues (mapAttrs (showSetting args) settingsInfo)); showSettings = args: settingsInfo: concatStrings (attrValues (mapAttrs (showSetting args) settingsInfo));
} }

View file

@ -219,6 +219,7 @@
enableParallelBuilding = true; enableParallelBuilding = true;
configureFlags = testConfigureFlags; # otherwise configure fails
dontBuild = true; dontBuild = true;
doInstallCheck = true; doInstallCheck = true;
@ -472,8 +473,6 @@
}; };
in { in {
inherit nixpkgsFor;
# A Nixpkgs overlay that overrides the 'nix' and # A Nixpkgs overlay that overrides the 'nix' and
# 'nix.perl-bindings' packages. # 'nix.perl-bindings' packages.
overlays.default = overlayFor (p: p.stdenv); overlays.default = overlayFor (p: p.stdenv);
@ -583,6 +582,8 @@
tests.nix-copy-closure = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy-closure.nix; tests.nix-copy-closure = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy-closure.nix;
tests.nix-copy = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy.nix;
tests.nssPreload = runNixOSTestFor "x86_64-linux" ./tests/nixos/nss-preload.nix; tests.nssPreload = runNixOSTestFor "x86_64-linux" ./tests/nixos/nss-preload.nix;
tests.githubFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/github-flakes.nix; tests.githubFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/github-flakes.nix;

View file

@ -1,6 +1,8 @@
clean-files += Makefile.config clean-files += Makefile.config
GLOBAL_CXXFLAGS += -Wno-deprecated-declarations GLOBAL_CXXFLAGS += -Wno-deprecated-declarations -Werror=switch
# Allow switch-enum to be overridden for files that do not support it, usually because of dependency headers.
ERROR_SWITCH_ENUM = -Werror=switch-enum
$(foreach i, config.h $(wildcard src/lib*/*.hh), \ $(foreach i, config.h $(wildcard src/lib*/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix, 0644))) $(eval $(call install-file-in, $(i), $(includedir)/nix, 0644)))

View file

@ -56,7 +56,7 @@ Meeting notes are collected on a [collaborative scratchpad](https://pad.lassul.u
The team uses a [GitHub project board](https://github.com/orgs/NixOS/projects/19/views/1) for tracking its work. The team uses a [GitHub project board](https://github.com/orgs/NixOS/projects/19/views/1) for tracking its work.
Issues on the board progress through the following states: Items on the board progress through the following states:
- No Status - No Status
@ -69,6 +69,7 @@ Issues on the board progress through the following states:
2. [security](https://github.com/NixOS/nix/labels/security) 2. [security](https://github.com/NixOS/nix/labels/security)
3. [regression](https://github.com/NixOS/nix/labels/regression) 3. [regression](https://github.com/NixOS/nix/labels/regression)
4. [bug](https://github.com/NixOS/nix/issues?q=is%3Aopen+label%3Abug+sort%3Areactions-%2B1-desc) 4. [bug](https://github.com/NixOS/nix/issues?q=is%3Aopen+label%3Abug+sort%3Areactions-%2B1-desc)
5. [tests of existing functionality](https://github.com/NixOS/nix/issues?q=is%3Aopen+label%3Atests+-label%3Afeature+sort%3Areactions-%2B1-desc)
- [oldest pull requests](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+sort%3Acreated-asc) - [oldest pull requests](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+sort%3Acreated-asc)
- [most popular pull requests](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+sort%3Areactions-%2B1-desc) - [most popular pull requests](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+sort%3Areactions-%2B1-desc)
@ -79,6 +80,9 @@ Issues on the board progress through the following states:
If there is disagreement on the general idea behind an issue or pull request, it is moved to _To discuss_, otherwise to _In review_. If there is disagreement on the general idea behind an issue or pull request, it is moved to _To discuss_, otherwise to _In review_.
To ensure process quality and reliability, all non-trivial pull requests must be triaged before merging.
What constitutes a trivial pull request is up to maintainers' judgement.
- To discuss - To discuss
Pull requests and issues that are deemed important and controversial are discussed by the team during discussion meetings. Pull requests and issues that are deemed important and controversial are discussed by the team during discussion meetings.
@ -91,7 +95,7 @@ Issues on the board progress through the following states:
Contributors who took the time to implement concrete change proposals should not wait indefinitely. Contributors who took the time to implement concrete change proposals should not wait indefinitely.
- Prioritise fixing bugs over documentation, improvements or new features - Prioritise fixing bugs and testing over documentation, improvements or new features
The team values stability and accessibility higher than raw functionality. The team values stability and accessibility higher than raw functionality.

View file

@ -1,10 +1,10 @@
$(buildprefix)%.o: %.cc $(buildprefix)%.o: %.cc
@mkdir -p "$(dir $@)" @mkdir -p "$(dir $@)"
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(call filename-to-dep, $@) -MP $(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) $(ERROR_SWITCH_ENUM) -MMD -MF $(call filename-to-dep, $@) -MP
$(buildprefix)%.o: %.cpp $(buildprefix)%.o: %.cpp
@mkdir -p "$(dir $@)" @mkdir -p "$(dir $@)"
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(call filename-to-dep, $@) -MP $(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) $(ERROR_SWITCH_ENUM) -MMD -MF $(call filename-to-dep, $@) -MP
$(buildprefix)%.o: %.c $(buildprefix)%.o: %.c
@mkdir -p "$(dir $@)" @mkdir -p "$(dir $@)"

View file

@ -27,8 +27,6 @@ static ref<Store> store()
if (!_store) { if (!_store) {
try { try {
initLibStore(); initLibStore();
loadConfFile();
settings.lockCPU = false;
_store = openStore(); _store = openStore();
} catch (Error & e) { } catch (Error & e) {
croak("%s", e.what()); croak("%s", e.what());

View file

@ -1,10 +1,20 @@
#pragma once
///@file
#include "installable-value.hh" #include "installable-value.hh"
#include "command.hh" #include "command.hh"
namespace nix { namespace nix {
/**
* An InstallableCommand where the single positional argument must be an
* InstallableValue in particular.
*/
struct InstallableValueCommand : InstallableCommand struct InstallableValueCommand : InstallableCommand
{ {
/**
* Entry point to this command
*/
virtual void run(ref<Store> store, ref<InstallableValue> installable) = 0; virtual void run(ref<Store> store, ref<InstallableValue> installable) = 0;
void run(ref<Store> store, ref<Installable> installable) override; void run(ref<Store> store, ref<Installable> installable) override;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "installable-value.hh" #include "installable-value.hh"
#include "args.hh" #include "args.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "args.hh" #include "args.hh"

View file

@ -1,11 +1,14 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
namespace nix { namespace nix {
/* Helper function to generate args that invoke $EDITOR on /**
filename:lineno. */ * Helper function to generate args that invoke $EDITOR on
* filename:lineno.
*/
Strings editorFor(const Path & file, uint32_t line); Strings editorFor(const Path & file, uint32_t line);
} }

View file

@ -1,3 +1,6 @@
#pragma once
///@file
#include "globals.hh" #include "globals.hh"
#include "installable-value.hh" #include "installable-value.hh"
#include "outputs-spec.hh" #include "outputs-spec.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "installables.hh" #include "installables.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "installable-value.hh" #include "installable-value.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "installables.hh" #include "installables.hh"
#include "flake/flake.hh" #include "flake/flake.hh"

View file

@ -102,6 +102,28 @@ MixFlakeOptions::MixFlakeOptions()
}} }}
}); });
addFlag({
.longName = "reference-lock-file",
.description = "Read the given lock file instead of `flake.lock` within the top-level flake.",
.category = category,
.labels = {"flake-lock-path"},
.handler = {[&](std::string lockFilePath) {
lockFlags.referenceLockFilePath = lockFilePath;
}},
.completer = completePath
});
addFlag({
.longName = "output-lock-file",
.description = "Write the given lock file instead of `flake.lock` within the top-level flake.",
.category = category,
.labels = {"flake-lock-path"},
.handler = {[&](std::string lockFilePath) {
lockFlags.outputLockFilePath = lockFilePath;
}},
.completer = completePath
});
addFlag({ addFlag({
.longName = "inputs-from", .longName = "inputs-from",
.description = "Use the inputs of the specified flake as registry entries.", .description = "Use the inputs of the specified flake as registry entries.",

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "util.hh" #include "util.hh"
#include "path.hh" #include "path.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <functional> #include <functional>
#include <map> #include <map>

View file

@ -1,3 +1,6 @@
#pragma once
///@file
#include "types.hh" #include "types.hh"
namespace nix { namespace nix {

View file

@ -40,6 +40,7 @@ extern "C" {
#include "markdown.hh" #include "markdown.hh"
#include "local-fs-store.hh" #include "local-fs-store.hh"
#include "progress-bar.hh" #include "progress-bar.hh"
#include "print.hh"
#if HAVE_BOEHMGC #if HAVE_BOEHMGC
#define GC_INCLUDE_NEW #define GC_INCLUDE_NEW
@ -252,7 +253,9 @@ void NixRepl::mainLoop()
el_hist_size = 1000; el_hist_size = 1000;
#endif #endif
read_history(historyFile.c_str()); read_history(historyFile.c_str());
auto oldRepl = curRepl;
curRepl = this; curRepl = this;
Finally restoreRepl([&] { curRepl = oldRepl; });
#ifndef READLINE #ifndef READLINE
rl_set_complete_func(completionCallback); rl_set_complete_func(completionCallback);
rl_set_list_possib_func(listPossibleCallback); rl_set_list_possib_func(listPossibleCallback);
@ -423,6 +426,7 @@ StringSet NixRepl::completePrefix(const std::string & prefix)
} }
// FIXME: DRY and match or use the parser
static bool isVarName(std::string_view s) static bool isVarName(std::string_view s)
{ {
if (s.size() == 0) return false; if (s.size() == 0) return false;
@ -892,17 +896,6 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
} }
std::ostream & printStringValue(std::ostream & str, const char * string) {
str << "\"";
for (const char * i = string; *i; i++)
if (*i == '\"' || *i == '\\') str << "\\" << *i;
else if (*i == '\n') str << "\\n";
else if (*i == '\r') str << "\\r";
else if (*i == '\t') str << "\\t";
else str << *i;
str << "\"";
return str;
}
// FIXME: lot of cut&paste from Nix's eval.cc. // FIXME: lot of cut&paste from Nix's eval.cc.
@ -920,12 +913,14 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
break; break;
case nBool: case nBool:
str << ANSI_CYAN << (v.boolean ? "true" : "false") << ANSI_NORMAL; str << ANSI_CYAN;
printLiteralBool(str, v.boolean);
str << ANSI_NORMAL;
break; break;
case nString: case nString:
str << ANSI_WARNING; str << ANSI_WARNING;
printStringValue(str, v.string.s); printLiteralString(str, v.string.s);
str << ANSI_NORMAL; str << ANSI_NORMAL;
break; break;
@ -962,10 +957,7 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
sorted.emplace(state->symbols[i.name], i.value); sorted.emplace(state->symbols[i.name], i.value);
for (auto & i : sorted) { for (auto & i : sorted) {
if (isVarName(i.first)) printAttributeName(str, i.first);
str << i.first;
else
printStringValue(str, i.first.c_str());
str << " = "; str << " = ";
if (seen.count(i.second)) if (seen.count(i.second))
str << "«repeated»"; str << "«repeated»";
@ -1024,6 +1016,8 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
str << v.fpoint; str << v.fpoint;
break; break;
case nThunk:
case nExternal:
default: default:
str << ANSI_RED "«unknown»" ANSI_NORMAL; str << ANSI_RED "«unknown»" ANSI_NORMAL;
break; break;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"
@ -16,7 +17,9 @@ std::pair<Value *, PosIdx> findAlongAttrPath(
Bindings & autoArgs, Bindings & autoArgs,
Value & vIn); Value & vIn);
/* Heuristic to find the filename and lineno or a nix value. */ /**
* Heuristic to find the filename and lineno or a nix value.
*/
std::pair<std::string, uint32_t> findPackageFilename(EvalState & state, Value & v, std::string what); std::pair<std::string, uint32_t> findPackageFilename(EvalState & state, Value & v, std::string what);
std::vector<Symbol> parseAttrPath(EvalState & state, std::string_view s); std::vector<Symbol> parseAttrPath(EvalState & state, std::string_view s);

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "nixexpr.hh" #include "nixexpr.hh"
#include "symbol-table.hh" #include "symbol-table.hh"
@ -12,7 +13,9 @@ namespace nix {
class EvalState; class EvalState;
struct Value; struct Value;
/* Map one attribute name to its value. */ /**
* Map one attribute name to its value.
*/
struct Attr struct Attr
{ {
/* the placement of `name` and `pos` in this struct is important. /* the placement of `name` and `pos` in this struct is important.
@ -36,10 +39,12 @@ static_assert(sizeof(Attr) == 2 * sizeof(uint32_t) + sizeof(Value *),
"avoid introducing any padding into Attr if at all possible, and do not " "avoid introducing any padding into Attr if at all possible, and do not "
"introduce new fields that need not be present for almost every instance."); "introduce new fields that need not be present for almost every instance.");
/* Bindings contains all the attributes of an attribute set. It is defined /**
by its size and its capacity, the capacity being the number of Attr * Bindings contains all the attributes of an attribute set. It is defined
elements allocated after this structure, while the size corresponds to * by its size and its capacity, the capacity being the number of Attr
the number of elements already inserted in this structure. */ * elements allocated after this structure, while the size corresponds to
* the number of elements already inserted in this structure.
*/
class Bindings class Bindings
{ {
public: public:
@ -94,7 +99,9 @@ public:
size_t capacity() { return capacity_; } size_t capacity() { return capacity_; }
/* Returns the attributes in lexicographically sorted order. */ /**
* Returns the attributes in lexicographically sorted order.
*/
std::vector<const Attr *> lexicographicOrder(const SymbolTable & symbols) const std::vector<const Attr *> lexicographicOrder(const SymbolTable & symbols) const
{ {
std::vector<const Attr *> res; std::vector<const Attr *> res;
@ -111,9 +118,11 @@ public:
friend class EvalState; friend class EvalState;
}; };
/* A wrapper around Bindings that ensures that its always in sorted /**
order at the end. The only way to consume a BindingsBuilder is to * A wrapper around Bindings that ensures that its always in sorted
call finish(), which sorts the bindings. */ * order at the end. The only way to consume a BindingsBuilder is to
* call finish(), which sorts the bindings.
*/
class BindingsBuilder class BindingsBuilder
{ {
Bindings * bindings; Bindings * bindings;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "sync.hh" #include "sync.hh"
#include "hash.hh" #include "hash.hh"
@ -109,8 +110,10 @@ public:
ref<AttrCursor> getAttr(std::string_view name); ref<AttrCursor> getAttr(std::string_view name);
/* Get an attribute along a chain of attrsets. Note that this does /**
not auto-call functors or functions. */ * Get an attribute along a chain of attrsets. Note that this does
* not auto-call functors or functions.
*/
OrSuggestions<ref<AttrCursor>> findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force = false); OrSuggestions<ref<AttrCursor>> findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force = false);
std::string getString(); std::string getString();
@ -129,7 +132,9 @@ public:
Value & forceValue(); Value & forceValue();
/* Force creation of the .drv file in the Nix store. */ /**
* Force creation of the .drv file in the Nix store.
*/
StorePath forceDerivation(); StorePath forceDerivation();
}; };

View file

@ -1,10 +1,13 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"
namespace nix { namespace nix {
/* Note: Various places expect the allocated memory to be zeroed. */ /**
* Note: Various places expect the allocated memory to be zeroed.
*/
[[gnu::always_inline]] [[gnu::always_inline]]
inline void * allocBytes(size_t n) inline void * allocBytes(size_t n)
{ {

View file

@ -9,6 +9,7 @@
#include "filetransfer.hh" #include "filetransfer.hh"
#include "function-trace.hh" #include "function-trace.hh"
#include "profiles.hh" #include "profiles.hh"
#include "print.hh"
#include <algorithm> #include <algorithm>
#include <chrono> #include <chrono>
@ -104,18 +105,10 @@ void Value::print(const SymbolTable & symbols, std::ostream & str,
str << integer; str << integer;
break; break;
case tBool: case tBool:
str << (boolean ? "true" : "false"); printLiteralBool(str, boolean);
break; break;
case tString: case tString:
str << "\""; printLiteralString(str, string.s);
for (const char * i = string.s; *i; i++)
if (*i == '\"' || *i == '\\') str << "\\" << *i;
else if (*i == '\n') str << "\\n";
else if (*i == '\r') str << "\\r";
else if (*i == '\t') str << "\\t";
else if (*i == '$' && *(i+1) == '{') str << "\\" << *i;
else str << *i;
str << "\"";
break; break;
case tPath: case tPath:
str << path; // !!! escaping? str << path; // !!! escaping?
@ -173,7 +166,17 @@ void Value::print(const SymbolTable & symbols, std::ostream & str,
case tFloat: case tFloat:
str << fpoint; str << fpoint;
break; break;
case tBlackhole:
// Although we know for sure that it's going to be an infinite recursion
// when this value is accessed _in the current context_, it's likely
// that the user will misinterpret a simpler «infinite recursion» output
// as a definitive statement about the value, while in fact it may be
// a valid value after `builtins.trace` and perhaps some other steps
// have completed.
str << "«potential infinite recursion»";
break;
default: default:
printError("Nix evaluator internal error: Value::print(): invalid value type %1%", internalType);
abort(); abort();
} }
} }
@ -229,6 +232,9 @@ std::string_view showType(ValueType type)
std::string showType(const Value & v) std::string showType(const Value & v)
{ {
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (v.internalType) { switch (v.internalType) {
case tString: return v.string.context ? "a string with context" : "a string"; case tString: return v.string.context ? "a string with context" : "a string";
case tPrimOp: case tPrimOp:
@ -242,16 +248,21 @@ std::string showType(const Value & v)
default: default:
return std::string(showType(v.type())); return std::string(showType(v.type()));
} }
#pragma GCC diagnostic pop
} }
PosIdx Value::determinePos(const PosIdx pos) const PosIdx Value::determinePos(const PosIdx pos) const
{ {
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (internalType) { switch (internalType) {
case tAttrs: return attrs->pos; case tAttrs: return attrs->pos;
case tLambda: return lambda.fun->pos; case tLambda: return lambda.fun->pos;
case tApp: return app.left->determinePos(pos); case tApp: return app.left->determinePos(pos);
default: return pos; default: return pos;
} }
#pragma GCC diagnostic pop
} }
bool Value::isTrivial() const bool Value::isTrivial() const
@ -326,6 +337,22 @@ static Symbol getName(const AttrName & name, EvalState & state, Env & env)
} }
} }
#if HAVE_BOEHMGC
/* Disable GC while this object lives. Used by CoroutineContext.
*
* Boehm keeps a count of GC_disable() and GC_enable() calls,
* and only enables GC when the count matches.
*/
class BoehmDisableGC {
public:
BoehmDisableGC() {
GC_disable();
};
~BoehmDisableGC() {
GC_enable();
};
};
#endif
static bool gcInitialised = false; static bool gcInitialised = false;
@ -350,6 +377,15 @@ void initGC()
StackAllocator::defaultAllocator = &boehmGCStackAllocator; StackAllocator::defaultAllocator = &boehmGCStackAllocator;
#if NIX_BOEHM_PATCH_VERSION != 1
printTalkative("Unpatched BoehmGC, disabling GC inside coroutines");
/* Used to disable GC when entering coroutines on macOS */
create_coro_gc_hook = []() -> std::shared_ptr<void> {
return std::make_shared<BoehmDisableGC>();
};
#endif
/* Set the initial heap size to something fairly big (25% of /* Set the initial heap size to something fairly big (25% of
physical RAM, up to a maximum of 384 MiB) so that in most cases physical RAM, up to a maximum of 384 MiB) so that in most cases
we don't need to garbage collect at all. (Collection has a we don't need to garbage collect at all. (Collection has a
@ -2327,6 +2363,7 @@ bool EvalState::eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_v
case nFloat: case nFloat:
return v1.fpoint == v2.fpoint; return v1.fpoint == v2.fpoint;
case nThunk: // Must not be left by forceValue
default: default:
error("cannot compare %1% with %2%", showType(v1), showType(v2)).withTrace(pos, errorCtx).debugThrow<EvalError>(); error("cannot compare %1% with %2%", showType(v1), showType(v2)).withTrace(pos, errorCtx).debugThrow<EvalError>();
} }

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "attr-set.hh" #include "attr-set.hh"
#include "types.hh" #include "types.hh"
@ -42,7 +43,10 @@ struct PrimOp
struct Env struct Env
{ {
Env * up; Env * up;
unsigned short prevWith:14; // nr of levels up to next `with' environment /**
* Number of of levels up to next `with` environment
*/
unsigned short prevWith:14;
enum { Plain = 0, HasWithExpr, HasWithAttrs } type:2; enum { Plain = 0, HasWithExpr, HasWithAttrs } type:2;
Value * values[0]; Value * values[0];
}; };
@ -55,8 +59,10 @@ std::unique_ptr<ValMap> mapStaticEnvBindings(const SymbolTable & st, const Stati
void copyContext(const Value & v, PathSet & context); void copyContext(const Value & v, PathSet & context);
/* Cache for calls to addToStore(); maps source paths to the store /**
paths. */ * Cache for calls to addToStore(); maps source paths to the store
* paths.
*/
typedef std::map<Path, StorePath> SrcToStore; typedef std::map<Path, StorePath> SrcToStore;
@ -68,7 +74,9 @@ typedef std::pair<std::string, std::string> SearchPathElem;
typedef std::list<SearchPathElem> SearchPath; typedef std::list<SearchPathElem> SearchPath;
/* Initialise the Boehm GC, if applicable. */ /**
* Initialise the Boehm GC, if applicable.
*/
void initGC(); void initGC();
@ -143,26 +151,36 @@ public:
sOutputSpecified; sOutputSpecified;
Symbol sDerivationNix; Symbol sDerivationNix;
/* If set, force copying files to the Nix store even if they /**
already exist there. */ * If set, force copying files to the Nix store even if they
* already exist there.
*/
RepairFlag repair; RepairFlag repair;
/* The allowed filesystem paths in restricted or pure evaluation /**
mode. */ * The allowed filesystem paths in restricted or pure evaluation
* mode.
*/
std::optional<PathSet> allowedPaths; std::optional<PathSet> allowedPaths;
Bindings emptyBindings; Bindings emptyBindings;
/* Store used to materialise .drv files. */ /**
* Store used to materialise .drv files.
*/
const ref<Store> store; const ref<Store> store;
/* Store used to build stuff. */ /**
* Store used to build stuff.
*/
const ref<Store> buildStore; const ref<Store> buildStore;
RootValue vCallFlake = nullptr; RootValue vCallFlake = nullptr;
RootValue vImportedDrvToDerivation = nullptr; RootValue vImportedDrvToDerivation = nullptr;
/* Debugger */ /**
* Debugger
*/
void (* debugRepl)(ref<EvalState> es, const ValMap & extraEnv); void (* debugRepl)(ref<EvalState> es, const ValMap & extraEnv);
bool debugStop; bool debugStop;
bool debugQuit; bool debugQuit;
@ -218,7 +236,9 @@ public:
private: private:
SrcToStore srcToStore; SrcToStore srcToStore;
/* A cache from path names to parse trees. */ /**
* A cache from path names to parse trees.
*/
#if HAVE_BOEHMGC #if HAVE_BOEHMGC
typedef std::map<Path, Expr *, std::less<Path>, traceable_allocator<std::pair<const Path, Expr *>>> FileParseCache; typedef std::map<Path, Expr *, std::less<Path>, traceable_allocator<std::pair<const Path, Expr *>>> FileParseCache;
#else #else
@ -226,7 +246,9 @@ private:
#endif #endif
FileParseCache fileParseCache; FileParseCache fileParseCache;
/* A cache from path names to values. */ /**
* A cache from path names to values.
*/
#if HAVE_BOEHMGC #if HAVE_BOEHMGC
typedef std::map<Path, Value, std::less<Path>, traceable_allocator<std::pair<const Path, Value>>> FileEvalCache; typedef std::map<Path, Value, std::less<Path>, traceable_allocator<std::pair<const Path, Value>>> FileEvalCache;
#else #else
@ -238,17 +260,25 @@ private:
std::map<std::string, std::pair<bool, std::string>> searchPathResolved; std::map<std::string, std::pair<bool, std::string>> searchPathResolved;
/* Cache used by checkSourcePath(). */ /**
* Cache used by checkSourcePath().
*/
std::unordered_map<Path, Path> resolvedPaths; std::unordered_map<Path, Path> resolvedPaths;
/* Cache used by prim_match(). */ /**
* Cache used by prim_match().
*/
std::shared_ptr<RegexCache> regexCache; std::shared_ptr<RegexCache> regexCache;
#if HAVE_BOEHMGC #if HAVE_BOEHMGC
/* Allocation cache for GC'd Value objects. */ /**
* Allocation cache for GC'd Value objects.
*/
std::shared_ptr<void *> valueAllocCache; std::shared_ptr<void *> valueAllocCache;
/* Allocation cache for size-1 Env objects. */ /**
* Allocation cache for size-1 Env objects.
*/
std::shared_ptr<void *> env1AllocCache; std::shared_ptr<void *> env1AllocCache;
#endif #endif
@ -264,47 +294,65 @@ public:
SearchPath getSearchPath() { return searchPath; } SearchPath getSearchPath() { return searchPath; }
/* Allow access to a path. */ /**
* Allow access to a path.
*/
void allowPath(const Path & path); void allowPath(const Path & path);
/* Allow access to a store path. Note that this gets remapped to /**
the real store path if `store` is a chroot store. */ * Allow access to a store path. Note that this gets remapped to
* the real store path if `store` is a chroot store.
*/
void allowPath(const StorePath & storePath); void allowPath(const StorePath & storePath);
/* Allow access to a store path and return it as a string. */ /**
* Allow access to a store path and return it as a string.
*/
void allowAndSetStorePathString(const StorePath & storePath, Value & v); void allowAndSetStorePathString(const StorePath & storePath, Value & v);
/* Check whether access to a path is allowed and throw an error if /**
not. Otherwise return the canonicalised path. */ * Check whether access to a path is allowed and throw an error if
* not. Otherwise return the canonicalised path.
*/
Path checkSourcePath(const Path & path); Path checkSourcePath(const Path & path);
void checkURI(const std::string & uri); void checkURI(const std::string & uri);
/* When using a diverted store and 'path' is in the Nix store, map /**
'path' to the diverted location (e.g. /nix/store/foo is mapped * When using a diverted store and 'path' is in the Nix store, map
to /home/alice/my-nix/nix/store/foo). However, this is only * 'path' to the diverted location (e.g. /nix/store/foo is mapped
done if the context is not empty, since otherwise we're * to /home/alice/my-nix/nix/store/foo). However, this is only
probably trying to read from the actual /nix/store. This is * done if the context is not empty, since otherwise we're
intended to distinguish between import-from-derivation and * probably trying to read from the actual /nix/store. This is
sources stored in the actual /nix/store. */ * intended to distinguish between import-from-derivation and
* sources stored in the actual /nix/store.
*/
Path toRealPath(const Path & path, const PathSet & context); Path toRealPath(const Path & path, const PathSet & context);
/* Parse a Nix expression from the specified file. */ /**
* Parse a Nix expression from the specified file.
*/
Expr * parseExprFromFile(const Path & path); Expr * parseExprFromFile(const Path & path);
Expr * parseExprFromFile(const Path & path, std::shared_ptr<StaticEnv> & staticEnv); Expr * parseExprFromFile(const Path & path, std::shared_ptr<StaticEnv> & staticEnv);
/* Parse a Nix expression from the specified string. */ /**
* Parse a Nix expression from the specified string.
*/
Expr * parseExprFromString(std::string s, const Path & basePath, std::shared_ptr<StaticEnv> & staticEnv); Expr * parseExprFromString(std::string s, const Path & basePath, std::shared_ptr<StaticEnv> & staticEnv);
Expr * parseExprFromString(std::string s, const Path & basePath); Expr * parseExprFromString(std::string s, const Path & basePath);
Expr * parseStdin(); Expr * parseStdin();
/* Evaluate an expression read from the given file to normal /**
form. Optionally enforce that the top-level expression is * Evaluate an expression read from the given file to normal
trivial (i.e. doesn't require arbitrary computation). */ * form. Optionally enforce that the top-level expression is
* trivial (i.e. doesn't require arbitrary computation).
*/
void evalFile(const Path & path, Value & v, bool mustBeTrivial = false); void evalFile(const Path & path, Value & v, bool mustBeTrivial = false);
/* Like `evalFile`, but with an already parsed expression. */ /**
* Like `evalFile`, but with an already parsed expression.
*/
void cacheFile( void cacheFile(
const Path & path, const Path & path,
const Path & resolvedPath, const Path & resolvedPath,
@ -314,37 +362,52 @@ public:
void resetFileCache(); void resetFileCache();
/* Look up a file in the search path. */ /**
* Look up a file in the search path.
*/
Path findFile(const std::string_view path); Path findFile(const std::string_view path);
Path findFile(SearchPath & searchPath, const std::string_view path, const PosIdx pos = noPos); Path findFile(SearchPath & searchPath, const std::string_view path, const PosIdx pos = noPos);
/* If the specified search path element is a URI, download it. */ /**
* If the specified search path element is a URI, download it.
*/
std::pair<bool, std::string> resolveSearchPathElem(const SearchPathElem & elem); std::pair<bool, std::string> resolveSearchPathElem(const SearchPathElem & elem);
/* Evaluate an expression to normal form, storing the result in /**
value `v'. */ * Evaluate an expression to normal form
*
* @param [out] v The resulting is stored here.
*/
void eval(Expr * e, Value & v); void eval(Expr * e, Value & v);
/* Evaluation the expression, then verify that it has the expected /**
type. */ * Evaluation the expression, then verify that it has the expected
* type.
*/
inline bool evalBool(Env & env, Expr * e); inline bool evalBool(Env & env, Expr * e);
inline bool evalBool(Env & env, Expr * e, const PosIdx pos, std::string_view errorCtx); inline bool evalBool(Env & env, Expr * e, const PosIdx pos, std::string_view errorCtx);
inline void evalAttrs(Env & env, Expr * e, Value & v, const PosIdx pos, std::string_view errorCtx); inline void evalAttrs(Env & env, Expr * e, Value & v, const PosIdx pos, std::string_view errorCtx);
/* If `v' is a thunk, enter it and overwrite `v' with the result /**
of the evaluation of the thunk. If `v' is a delayed function * If `v` is a thunk, enter it and overwrite `v` with the result
application, call the function and overwrite `v' with the * of the evaluation of the thunk. If `v` is a delayed function
result. Otherwise, this is a no-op. */ * application, call the function and overwrite `v` with the
* result. Otherwise, this is a no-op.
*/
inline void forceValue(Value & v, const PosIdx pos); inline void forceValue(Value & v, const PosIdx pos);
template <typename Callable> template <typename Callable>
inline void forceValue(Value & v, Callable getPos); inline void forceValue(Value & v, Callable getPos);
/* Force a value, then recursively force list elements and /**
attributes. */ * Force a value, then recursively force list elements and
* attributes.
*/
void forceValueDeep(Value & v); void forceValueDeep(Value & v);
/* Force `v', and then verify that it has the expected type. */ /**
* Force `v`, and then verify that it has the expected type.
*/
NixInt forceInt(Value & v, const PosIdx pos, std::string_view errorCtx); NixInt forceInt(Value & v, const PosIdx pos, std::string_view errorCtx);
NixFloat forceFloat(Value & v, const PosIdx pos, std::string_view errorCtx); NixFloat forceFloat(Value & v, const PosIdx pos, std::string_view errorCtx);
bool forceBool(Value & v, const PosIdx pos, std::string_view errorCtx); bool forceBool(Value & v, const PosIdx pos, std::string_view errorCtx);
@ -355,7 +418,10 @@ public:
inline void forceAttrs(Value & v, Callable getPos, std::string_view errorCtx); inline void forceAttrs(Value & v, Callable getPos, std::string_view errorCtx);
inline void forceList(Value & v, const PosIdx pos, std::string_view errorCtx); inline void forceList(Value & v, const PosIdx pos, std::string_view errorCtx);
void forceFunction(Value & v, const PosIdx pos, std::string_view errorCtx); // either lambda or primop /**
* @param v either lambda or primop
*/
void forceFunction(Value & v, const PosIdx pos, std::string_view errorCtx);
std::string_view forceString(Value & v, const PosIdx pos, std::string_view errorCtx); std::string_view forceString(Value & v, const PosIdx pos, std::string_view errorCtx);
std::string_view forceString(Value & v, PathSet & context, const PosIdx pos, std::string_view errorCtx); std::string_view forceString(Value & v, PathSet & context, const PosIdx pos, std::string_view errorCtx);
std::string_view forceStringNoCtx(Value & v, const PosIdx pos, std::string_view errorCtx); std::string_view forceStringNoCtx(Value & v, const PosIdx pos, std::string_view errorCtx);
@ -366,17 +432,23 @@ public:
void addErrorTrace(Error & e, const PosIdx pos, const char * s, const std::string & s2, bool frame = false) const; void addErrorTrace(Error & e, const PosIdx pos, const char * s, const std::string & s2, bool frame = false) const;
public: public:
/* Return true iff the value `v' denotes a derivation (i.e. a /**
set with attribute `type = "derivation"'). */ * @return true iff the value `v` denotes a derivation (i.e. a
* set with attribute `type = "derivation"`).
*/
bool isDerivation(Value & v); bool isDerivation(Value & v);
std::optional<std::string> tryAttrsToString(const PosIdx pos, Value & v, std::optional<std::string> tryAttrsToString(const PosIdx pos, Value & v,
PathSet & context, bool coerceMore = false, bool copyToStore = true); PathSet & context, bool coerceMore = false, bool copyToStore = true);
/* String coercion. Converts strings, paths and derivations to a /**
string. If `coerceMore' is set, also converts nulls, integers, * String coercion.
booleans and lists to a string. If `copyToStore' is set, *
referenced paths are copied to the Nix store as a side effect. */ * Converts strings, paths and derivations to a
* string. If `coerceMore` is set, also converts nulls, integers,
* booleans and lists to a string. If `copyToStore` is set,
* referenced paths are copied to the Nix store as a side effect.
*/
BackedStringView coerceToString(const PosIdx pos, Value & v, PathSet & context, BackedStringView coerceToString(const PosIdx pos, Value & v, PathSet & context,
std::string_view errorCtx, std::string_view errorCtx,
bool coerceMore = false, bool copyToStore = true, bool coerceMore = false, bool copyToStore = true,
@ -384,21 +456,31 @@ public:
StorePath copyPathToStore(PathSet & context, const Path & path); StorePath copyPathToStore(PathSet & context, const Path & path);
/* Path coercion. Converts strings, paths and derivations to a /**
path. The result is guaranteed to be a canonicalised, absolute * Path coercion.
path. Nothing is copied to the store. */ *
* Converts strings, paths and derivations to a
* path. The result is guaranteed to be a canonicalised, absolute
* path. Nothing is copied to the store.
*/
Path coerceToPath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx); Path coerceToPath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx);
/* Like coerceToPath, but the result must be a store path. */ /**
* Like coerceToPath, but the result must be a store path.
*/
StorePath coerceToStorePath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx); StorePath coerceToStorePath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx);
public: public:
/* The base environment, containing the builtin functions and /**
values. */ * The base environment, containing the builtin functions and
* values.
*/
Env & baseEnv; Env & baseEnv;
/* The same, but used during parsing to resolve variables. */ /**
* The same, but used during parsing to resolve variables.
*/
std::shared_ptr<StaticEnv> staticBaseEnv; // !!! should be private std::shared_ptr<StaticEnv> staticBaseEnv; // !!! should be private
private: private:
@ -448,8 +530,10 @@ private:
public: public:
/* Do a deep equality test between two values. That is, list /**
elements and attributes are compared recursively. */ * Do a deep equality test between two values. That is, list
* elements and attributes are compared recursively.
*/
bool eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_view errorCtx); bool eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_view errorCtx);
bool isFunctor(Value & fun); bool isFunctor(Value & fun);
@ -463,11 +547,15 @@ public:
callFunction(fun, 1, args, vRes, pos); callFunction(fun, 1, args, vRes, pos);
} }
/* Automatically call a function for which each argument has a /**
default value or has a binding in the `args' map. */ * Automatically call a function for which each argument has a
* default value or has a binding in the `args` map.
*/
void autoCallFunction(Bindings & args, Value & fun, Value & res); void autoCallFunction(Bindings & args, Value & fun, Value & res);
/* Allocation primitives. */ /**
* Allocation primitives.
*/
inline Value * allocValue(); inline Value * allocValue();
inline Env & allocEnv(size_t size); inline Env & allocEnv(size_t size);
@ -487,10 +575,13 @@ public:
void concatLists(Value & v, size_t nrLists, Value * * lists, const PosIdx pos, std::string_view errorCtx); void concatLists(Value & v, size_t nrLists, Value * * lists, const PosIdx pos, std::string_view errorCtx);
/* Print statistics. */ /**
* Print statistics.
*/
void printStats(); void printStats();
/* Realise the given context, and return a mapping from the placeholders /**
* Realise the given context, and return a mapping from the placeholders
* used to construct the associated value to their final store path * used to construct the associated value to their final store path
*/ */
[[nodiscard]] StringMap realiseContext(const PathSet & context); [[nodiscard]] StringMap realiseContext(const PathSet & context);
@ -550,11 +641,15 @@ struct DebugTraceStacker {
DebugTrace trace; DebugTrace trace;
}; };
/* Return a string representing the type of the value `v'. */ /**
* @return A string representing the type of the value `v`.
*/
std::string_view showType(ValueType type); std::string_view showType(ValueType type);
std::string showType(const Value & v); std::string showType(const Value & v);
/* If `path' refers to a directory, then append "/default.nix". */ /**
* If `path` refers to a directory, then append "/default.nix".
*/
Path resolveExprPath(Path path); Path resolveExprPath(Path path);
struct InvalidPathError : EvalError struct InvalidPathError : EvalError

View file

@ -125,6 +125,9 @@ static FlakeInput parseFlakeInput(EvalState & state,
follows.insert(follows.begin(), lockRootPath.begin(), lockRootPath.end()); follows.insert(follows.begin(), lockRootPath.begin(), lockRootPath.end());
input.follows = follows; input.follows = follows;
} else { } else {
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (attr.value->type()) { switch (attr.value->type()) {
case nString: case nString:
attrs.emplace(state.symbols[attr.name], attr.value->string.s); attrs.emplace(state.symbols[attr.name], attr.value->string.s);
@ -139,6 +142,7 @@ static FlakeInput parseFlakeInput(EvalState & state,
throw TypeError("flake input attribute '%s' is %s while a string, Boolean, or integer is expected", throw TypeError("flake input attribute '%s' is %s while a string, Boolean, or integer is expected",
state.symbols[attr.name], showType(*attr.value)); state.symbols[attr.name], showType(*attr.value));
} }
#pragma GCC diagnostic pop
} }
} catch (Error & e) { } catch (Error & e) {
e.addTrace( e.addTrace(
@ -334,10 +338,14 @@ LockedFlake lockFlake(
} }
try { try {
if (!fetchSettings.allowDirty && lockFlags.referenceLockFilePath) {
throw Error("reference lock file was provided, but the `allow-dirty` setting is set to false");
}
// FIXME: symlink attack // FIXME: symlink attack
auto oldLockFile = LockFile::read( auto oldLockFile = LockFile::read(
flake.sourceInfo->actualPath + "/" + flake.lockedRef.subdir + "/flake.lock"); lockFlags.referenceLockFilePath.value_or(
flake.sourceInfo->actualPath + "/" + flake.lockedRef.subdir + "/flake.lock"));
debug("old lock file: %s", oldLockFile); debug("old lock file: %s", oldLockFile);
@ -619,13 +627,20 @@ LockedFlake lockFlake(
debug("new lock file: %s", newLockFile); debug("new lock file: %s", newLockFile);
auto relPath = (topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock";
auto sourcePath = topRef.input.getSourcePath();
auto outputLockFilePath = sourcePath ? std::optional{*sourcePath + "/" + relPath} : std::nullopt;
if (lockFlags.outputLockFilePath) {
outputLockFilePath = lockFlags.outputLockFilePath;
}
/* Check whether we need to / can write the new lock file. */ /* Check whether we need to / can write the new lock file. */
if (!(newLockFile == oldLockFile)) { if (newLockFile != oldLockFile || lockFlags.outputLockFilePath) {
auto diff = LockFile::diff(oldLockFile, newLockFile); auto diff = LockFile::diff(oldLockFile, newLockFile);
if (lockFlags.writeLockFile) { if (lockFlags.writeLockFile) {
if (auto sourcePath = topRef.input.getSourcePath()) { if (outputLockFilePath) {
if (auto unlockedInput = newLockFile.isUnlocked()) { if (auto unlockedInput = newLockFile.isUnlocked()) {
if (fetchSettings.warnDirty) if (fetchSettings.warnDirty)
warn("will not write lock file of flake '%s' because it has an unlocked input ('%s')", topRef, *unlockedInput); warn("will not write lock file of flake '%s' because it has an unlocked input ('%s')", topRef, *unlockedInput);
@ -633,25 +648,24 @@ LockedFlake lockFlake(
if (!lockFlags.updateLockFile) if (!lockFlags.updateLockFile)
throw Error("flake '%s' requires lock file changes but they're not allowed due to '--no-update-lock-file'", topRef); throw Error("flake '%s' requires lock file changes but they're not allowed due to '--no-update-lock-file'", topRef);
auto relPath = (topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock"; bool lockFileExists = pathExists(*outputLockFilePath);
auto path = *sourcePath + "/" + relPath;
bool lockFileExists = pathExists(path);
if (lockFileExists) { if (lockFileExists) {
auto s = chomp(diff); auto s = chomp(diff);
if (s.empty()) if (s.empty())
warn("updating lock file '%s'", path); warn("updating lock file '%s'", *outputLockFilePath);
else else
warn("updating lock file '%s':\n%s", path, s); warn("updating lock file '%s':\n%s", *outputLockFilePath, s);
} else } else
warn("creating lock file '%s'", path); warn("creating lock file '%s'", *outputLockFilePath);
newLockFile.write(path); newLockFile.write(*outputLockFilePath);
std::optional<std::string> commitMessage = std::nullopt; std::optional<std::string> commitMessage = std::nullopt;
if (lockFlags.commitLockFile) { if (lockFlags.commitLockFile) {
if (lockFlags.outputLockFilePath) {
throw Error("--commit-lock-file and --output-lock-file are currently incompatible");
}
std::string cm; std::string cm;
cm = fetchSettings.commitLockFileSummary.get(); cm = fetchSettings.commitLockFileSummary.get();

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "flakeref.hh" #include "flakeref.hh"
@ -17,7 +18,8 @@ struct FlakeInput;
typedef std::map<FlakeId, FlakeInput> FlakeInputs; typedef std::map<FlakeId, FlakeInput> FlakeInputs;
/* FlakeInput is the 'Flake'-level parsed form of the "input" entries /**
* FlakeInput is the 'Flake'-level parsed form of the "input" entries
* in the flake file. * in the flake file.
* *
* A FlakeInput is normally constructed by the 'parseFlakeInput' * A FlakeInput is normally constructed by the 'parseFlakeInput'
@ -41,7 +43,12 @@ typedef std::map<FlakeId, FlakeInput> FlakeInputs;
struct FlakeInput struct FlakeInput
{ {
std::optional<FlakeRef> ref; std::optional<FlakeRef> ref;
bool isFlake = true; // true = process flake to get outputs, false = (fetched) static source path /**
* true = process flake to get outputs
*
* false = (fetched) static source path
*/
bool isFlake = true;
std::optional<InputPath> follows; std::optional<InputPath> follows;
FlakeInputs overrides; FlakeInputs overrides;
}; };
@ -55,23 +62,42 @@ struct ConfigFile
void apply(); void apply();
}; };
/* The contents of a flake.nix file. */ /**
* The contents of a flake.nix file.
*/
struct Flake struct Flake
{ {
FlakeRef originalRef; // the original flake specification (by the user) /**
FlakeRef resolvedRef; // registry references and caching resolved to the specific underlying flake * The original flake specification (by the user)
FlakeRef lockedRef; // the specific local store result of invoking the fetcher */
bool forceDirty = false; // pretend that 'lockedRef' is dirty FlakeRef originalRef;
/**
* registry references and caching resolved to the specific underlying flake
*/
FlakeRef resolvedRef;
/**
* the specific local store result of invoking the fetcher
*/
FlakeRef lockedRef;
/**
* pretend that 'lockedRef' is dirty
*/
bool forceDirty = false;
std::optional<std::string> description; std::optional<std::string> description;
std::shared_ptr<const fetchers::Tree> sourceInfo; std::shared_ptr<const fetchers::Tree> sourceInfo;
FlakeInputs inputs; FlakeInputs inputs;
ConfigFile config; // 'nixConfig' attribute /**
* 'nixConfig' attribute
*/
ConfigFile config;
~Flake(); ~Flake();
}; };
Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool allowLookup); Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool allowLookup);
/* Fingerprint of a locked flake; used as a cache key. */ /**
* Fingerprint of a locked flake; used as a cache key.
*/
typedef Hash Fingerprint; typedef Hash Fingerprint;
struct LockedFlake struct LockedFlake
@ -84,44 +110,72 @@ struct LockedFlake
struct LockFlags struct LockFlags
{ {
/* Whether to ignore the existing lock file, creating a new one /**
from scratch. */ * Whether to ignore the existing lock file, creating a new one
* from scratch.
*/
bool recreateLockFile = false; bool recreateLockFile = false;
/* Whether to update the lock file at all. If set to false, if any /**
change to the lock file is needed (e.g. when an input has been * Whether to update the lock file at all. If set to false, if any
added to flake.nix), you get a fatal error. */ * change to the lock file is needed (e.g. when an input has been
* added to flake.nix), you get a fatal error.
*/
bool updateLockFile = true; bool updateLockFile = true;
/* Whether to write the lock file to disk. If set to true, if the /**
any changes to the lock file are needed and the flake is not * Whether to write the lock file to disk. If set to true, if the
writable (i.e. is not a local Git working tree or similar), you * any changes to the lock file are needed and the flake is not
get a fatal error. If set to false, Nix will use the modified * writable (i.e. is not a local Git working tree or similar), you
lock file in memory only, without writing it to disk. */ * get a fatal error. If set to false, Nix will use the modified
* lock file in memory only, without writing it to disk.
*/
bool writeLockFile = true; bool writeLockFile = true;
/* Whether to use the registries to lookup indirect flake /**
references like 'nixpkgs'. */ * Whether to use the registries to lookup indirect flake
* references like 'nixpkgs'.
*/
std::optional<bool> useRegistries = std::nullopt; std::optional<bool> useRegistries = std::nullopt;
/* Whether to apply flake's nixConfig attribute to the configuration */ /**
* Whether to apply flake's nixConfig attribute to the configuration
*/
bool applyNixConfig = false; bool applyNixConfig = false;
/* Whether unlocked flake references (i.e. those without a Git /**
revision or similar) without a corresponding lock are * Whether unlocked flake references (i.e. those without a Git
allowed. Unlocked flake references with a lock are always * revision or similar) without a corresponding lock are
allowed. */ * allowed. Unlocked flake references with a lock are always
* allowed.
*/
bool allowUnlocked = true; bool allowUnlocked = true;
/* Whether to commit changes to flake.lock. */ /**
* Whether to commit changes to flake.lock.
*/
bool commitLockFile = false; bool commitLockFile = false;
/* Flake inputs to be overridden. */ /**
* The path to a lock file to read instead of the `flake.lock` file in the top-level flake
*/
std::optional<std::string> referenceLockFilePath;
/**
* The path to a lock file to write to instead of the `flake.lock` file in the top-level flake
*/
std::optional<Path> outputLockFilePath;
/**
* Flake inputs to be overridden.
*/
std::map<InputPath, FlakeRef> inputOverrides; std::map<InputPath, FlakeRef> inputOverrides;
/* Flake inputs to be updated. This means that any existing lock /**
for those inputs will be ignored. */ * Flake inputs to be updated. This means that any existing lock
* for those inputs will be ignored.
*/
std::set<InputPath> inputUpdates; std::set<InputPath> inputUpdates;
}; };

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "hash.hh" #include "hash.hh"
@ -13,7 +14,8 @@ class Store;
typedef std::string FlakeId; typedef std::string FlakeId;
/* A flake reference specifies how to fetch a flake or raw source /**
* A flake reference specifies how to fetch a flake or raw source
* (e.g. from a Git repository). It is created from a URL-like syntax * (e.g. from a Git repository). It is created from a URL-like syntax
* (e.g. 'github:NixOS/patchelf'), an attrset representation (e.g. '{ * (e.g. 'github:NixOS/patchelf'), an attrset representation (e.g. '{
* type="github"; owner = "NixOS"; repo = "patchelf"; }'), or a local * type="github"; owner = "NixOS"; repo = "patchelf"; }'), or a local
@ -32,14 +34,17 @@ typedef std::string FlakeId;
* be lazy), but the fetcher can be invoked at any time via the * be lazy), but the fetcher can be invoked at any time via the
* FlakeRef to ensure the store is populated with this input. * FlakeRef to ensure the store is populated with this input.
*/ */
struct FlakeRef struct FlakeRef
{ {
/* Fetcher-specific representation of the input, sufficient to /**
perform the fetch operation. */ * Fetcher-specific representation of the input, sufficient to
* perform the fetch operation.
*/
fetchers::Input input; fetchers::Input input;
/* sub-path within the fetched input that represents this input */ /**
* sub-path within the fetched input that represents this input
*/
Path subdir; Path subdir;
bool operator==(const FlakeRef & other) const; bool operator==(const FlakeRef & other) const;

View file

@ -234,6 +234,11 @@ bool LockFile::operator ==(const LockFile & other) const
return toJSON() == other.toJSON(); return toJSON() == other.toJSON();
} }
bool LockFile::operator !=(const LockFile & other) const
{
return !(*this == other);
}
InputPath parseInputPath(std::string_view s) InputPath parseInputPath(std::string_view s)
{ {
InputPath path; InputPath path;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "flakeref.hh" #include "flakeref.hh"
@ -15,9 +16,11 @@ typedef std::vector<FlakeId> InputPath;
struct LockedNode; struct LockedNode;
/* A node in the lock file. It has outgoing edges to other nodes (its /**
inputs). Only the root node has this type; all other nodes have * A node in the lock file. It has outgoing edges to other nodes (its
type LockedNode. */ * inputs). Only the root node has this type; all other nodes have
* type LockedNode.
*/
struct Node : std::enable_shared_from_this<Node> struct Node : std::enable_shared_from_this<Node>
{ {
typedef std::variant<ref<LockedNode>, InputPath> Edge; typedef std::variant<ref<LockedNode>, InputPath> Edge;
@ -27,7 +30,9 @@ struct Node : std::enable_shared_from_this<Node>
virtual ~Node() { } virtual ~Node() { }
}; };
/* A non-root node in the lock file. */ /**
* A non-root node in the lock file.
*/
struct LockedNode : Node struct LockedNode : Node
{ {
FlakeRef lockedRef, originalRef; FlakeRef lockedRef, originalRef;
@ -62,10 +67,15 @@ struct LockFile
void write(const Path & path) const; void write(const Path & path) const;
/* Check whether this lock file has any unlocked inputs. */ /**
* Check whether this lock file has any unlocked inputs.
*/
std::optional<FlakeRef> isUnlocked() const; std::optional<FlakeRef> isUnlocked() const;
bool operator ==(const LockFile & other) const; bool operator ==(const LockFile & other) const;
// Needed for old gcc versions that don't synthesize it (like gcc 8.2.2
// that is still the default on aarch64-linux)
bool operator !=(const LockFile & other) const;
std::shared_ptr<Node> findInput(const InputPath & path); std::shared_ptr<Node> findInput(const InputPath & path);
@ -73,7 +83,9 @@ struct LockFile
static std::string diff(const LockFile & oldLocks, const LockFile & newLocks); static std::string diff(const LockFile & oldLocks, const LockFile & newLocks);
/* Check that every 'follows' input target exists. */ /**
* Check that every 'follows' input target exists.
*/
void check(); void check();
}; };

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"
#include "path.hh" #include "path.hh"
@ -25,7 +26,10 @@ private:
mutable std::string outputName; mutable std::string outputName;
Outputs outputs; Outputs outputs;
bool failed = false; // set if we get an AssertionError /**
* Set if we get an AssertionError
*/
bool failed = false;
Bindings * attrs = nullptr, * meta = nullptr; Bindings * attrs = nullptr, * meta = nullptr;
@ -34,7 +38,10 @@ private:
bool checkMeta(Value & v); bool checkMeta(Value & v);
public: public:
std::string attrPath; /* path towards the derivation */ /**
* path towards the derivation
*/
std::string attrPath;
DrvInfo(EvalState & state) : state(&state) { }; DrvInfo(EvalState & state) : state(&state) { };
DrvInfo(EvalState & state, std::string attrPath, Bindings * attrs); DrvInfo(EvalState & state, std::string attrPath, Bindings * attrs);
@ -46,8 +53,10 @@ public:
StorePath requireDrvPath() const; StorePath requireDrvPath() const;
StorePath queryOutPath() const; StorePath queryOutPath() const;
std::string queryOutputName() const; std::string queryOutputName() const;
/** Return the unordered map of output names to (optional) output paths. /**
* The "outputs to install" are determined by `meta.outputsToInstall`. */ * Return the unordered map of output names to (optional) output paths.
* The "outputs to install" are determined by `meta.outputsToInstall`.
*/
Outputs queryOutputs(bool withPaths = true, bool onlyOutputsToInstall = false); Outputs queryOutputs(bool withPaths = true, bool onlyOutputsToInstall = false);
StringSet queryMetaNames(); StringSet queryMetaNames();
@ -79,8 +88,10 @@ typedef std::list<DrvInfo> DrvInfos;
#endif #endif
/* If value `v' denotes a derivation, return a DrvInfo object /**
describing it. Otherwise return nothing. */ * If value `v` denotes a derivation, return a DrvInfo object
* describing it. Otherwise return nothing.
*/
std::optional<DrvInfo> getDerivation(EvalState & state, std::optional<DrvInfo> getDerivation(EvalState & state,
Value & v, bool ignoreAssertionFailures); Value & v, bool ignoreAssertionFailures);

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"

View file

@ -46,3 +46,5 @@ $(foreach i, $(wildcard src/libexpr/flake/*.hh), \
$(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh $(d)/primops/derivation.nix.gen.hh $(d)/fetchurl.nix.gen.hh $(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh $(d)/primops/derivation.nix.gen.hh $(d)/fetchurl.nix.gen.hh
$(d)/flake/flake.cc: $(d)/flake/call-flake.nix.gen.hh $(d)/flake/flake.cc: $(d)/flake/call-flake.nix.gen.hh
src/libexpr/primops/fromTOML.o: ERROR_SWITCH_ENUM =

View file

@ -3,6 +3,7 @@
#include "eval.hh" #include "eval.hh"
#include "symbol-table.hh" #include "symbol-table.hh"
#include "util.hh" #include "util.hh"
#include "print.hh"
#include <cstdlib> #include <cstdlib>
@ -60,45 +61,12 @@ Pos::operator std::shared_ptr<AbstractPos>() const
return pos; return pos;
} }
/* Displaying abstract syntax trees. */ // FIXME: remove, because *symbols* are abstract and do not have a single
// textual representation; see printIdentifier()
static void showString(std::ostream & str, std::string_view s)
{
str << '"';
for (auto c : s)
if (c == '"' || c == '\\' || c == '$') str << "\\" << c;
else if (c == '\n') str << "\\n";
else if (c == '\r') str << "\\r";
else if (c == '\t') str << "\\t";
else str << c;
str << '"';
}
std::ostream & operator <<(std::ostream & str, const SymbolStr & symbol) std::ostream & operator <<(std::ostream & str, const SymbolStr & symbol)
{ {
std::string_view s = symbol; std::string_view s = symbol;
return printIdentifier(str, s);
if (s.empty())
str << "\"\"";
else if (s == "if") // FIXME: handle other keywords
str << '"' << s << '"';
else {
char c = s[0];
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')) {
showString(str, s);
return str;
}
for (auto c : s)
if (!((c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') ||
c == '_' || c == '\'' || c == '-')) {
showString(str, s);
return str;
}
str << s;
}
return str;
} }
void Expr::show(const SymbolTable & symbols, std::ostream & str) const void Expr::show(const SymbolTable & symbols, std::ostream & str) const
@ -118,7 +86,7 @@ void ExprFloat::show(const SymbolTable & symbols, std::ostream & str) const
void ExprString::show(const SymbolTable & symbols, std::ostream & str) const void ExprString::show(const SymbolTable & symbols, std::ostream & str) const
{ {
showString(str, s); printLiteralString(str, s);
} }
void ExprPath::show(const SymbolTable & symbols, std::ostream & str) const void ExprPath::show(const SymbolTable & symbols, std::ostream & str) const

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <map> #include <map>
#include <vector> #include <vector>
@ -21,7 +22,9 @@ MakeError(UndefinedVarError, Error);
MakeError(MissingArgumentError, EvalError); MakeError(MissingArgumentError, EvalError);
MakeError(RestrictedPathError, Error); MakeError(RestrictedPathError, Error);
/* Position objects. */ /**
* Position objects.
*/
struct Pos struct Pos
{ {
uint32_t line; uint32_t line;
@ -132,7 +135,9 @@ class EvalState;
struct StaticEnv; struct StaticEnv;
/* An attribute path is a sequence of attribute names. */ /**
* An attribute path is a sequence of attribute names.
*/
struct AttrName struct AttrName
{ {
Symbol symbol; Symbol symbol;
@ -212,11 +217,11 @@ struct ExprVar : Expr
or function argument) or from a "with". */ or function argument) or from a "with". */
bool fromWith; bool fromWith;
/* In the former case, the value is obtained by going `level' /* In the former case, the value is obtained by going `level`
levels up from the current environment and getting the levels up from the current environment and getting the
`displ'th value in that environment. In the latter case, the `displ`th value in that environment. In the latter case, the
value is obtained by getting the attribute named `name' from value is obtained by getting the attribute named `name` from
the set stored in the environment that is `level' levels up the set stored in the environment that is `level` levels up
from the current one.*/ from the current one.*/
Level level; Level level;
Displacement displ; Displacement displ;

View file

@ -577,6 +577,9 @@ struct CompareValues
return v1->integer < v2->fpoint; return v1->integer < v2->fpoint;
if (v1->type() != v2->type()) if (v1->type() != v2->type())
state.error("cannot compare %s with %s", showType(*v1), showType(*v2)).debugThrow<EvalError>(); state.error("cannot compare %s with %s", showType(*v1), showType(*v2)).debugThrow<EvalError>();
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (v1->type()) { switch (v1->type()) {
case nInt: case nInt:
return v1->integer < v2->integer; return v1->integer < v2->integer;
@ -599,6 +602,7 @@ struct CompareValues
} }
default: default:
state.error("cannot compare %s with %s; values of that type are incomparable", showType(*v1), showType(*v2)).debugThrow<EvalError>(); state.error("cannot compare %s with %s; values of that type are incomparable", showType(*v1), showType(*v2)).debugThrow<EvalError>();
#pragma GCC diagnostic pop
} }
} catch (Error & e) { } catch (Error & e) {
if (!errorCtx.empty()) if (!errorCtx.empty())

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "eval.hh" #include "eval.hh"
@ -22,9 +23,11 @@ struct RegisterPrimOp
typedef std::vector<Info> PrimOps; typedef std::vector<Info> PrimOps;
static PrimOps * primOps; static PrimOps * primOps;
/* You can register a constant by passing an arity of 0. fun /**
will get called during EvalState initialization, so there * You can register a constant by passing an arity of 0. fun
may be primops not yet added and builtins is not yet sorted. */ * will get called during EvalState initialization, so there
* may be primops not yet added and builtins is not yet sorted.
*/
RegisterPrimOp( RegisterPrimOp(
std::string name, std::string name,
size_t arity, size_t arity,
@ -37,10 +40,14 @@ struct RegisterPrimOp
may wish to use them in limited contexts without globally enabling may wish to use them in limited contexts without globally enabling
them. */ them. */
/* Load a ValueInitializer from a DSO and return whatever it initializes */ /**
* Load a ValueInitializer from a DSO and return whatever it initializes
*/
void prim_importNative(EvalState & state, const PosIdx pos, Value * * args, Value & v); void prim_importNative(EvalState & state, const PosIdx pos, Value * * args, Value & v);
/* Execute a program and parse its output */ /**
* Execute a program and parse its output
*/
void prim_exec(EvalState & state, const PosIdx pos, Value * * args, Value & v); void prim_exec(EvalState & state, const PosIdx pos, Value * * args, Value & v);
} }

78
src/libexpr/print.cc Normal file
View file

@ -0,0 +1,78 @@
#include "print.hh"
namespace nix {
std::ostream &
printLiteralString(std::ostream & str, const std::string_view string)
{
str << "\"";
for (auto i = string.begin(); i != string.end(); ++i) {
if (*i == '\"' || *i == '\\') str << "\\" << *i;
else if (*i == '\n') str << "\\n";
else if (*i == '\r') str << "\\r";
else if (*i == '\t') str << "\\t";
else if (*i == '$' && *(i+1) == '{') str << "\\" << *i;
else str << *i;
}
str << "\"";
return str;
}
std::ostream &
printLiteralBool(std::ostream & str, bool boolean)
{
str << (boolean ? "true" : "false");
return str;
}
std::ostream &
printIdentifier(std::ostream & str, std::string_view s) {
if (s.empty())
str << "\"\"";
else if (s == "if") // FIXME: handle other keywords
str << '"' << s << '"';
else {
char c = s[0];
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')) {
printLiteralString(str, s);
return str;
}
for (auto c : s)
if (!((c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') ||
c == '_' || c == '\'' || c == '-')) {
printLiteralString(str, s);
return str;
}
str << s;
}
return str;
}
// FIXME: keywords
static bool isVarName(std::string_view s)
{
if (s.size() == 0) return false;
char c = s[0];
if ((c >= '0' && c <= '9') || c == '-' || c == '\'') return false;
for (auto & i : s)
if (!((i >= 'a' && i <= 'z') ||
(i >= 'A' && i <= 'Z') ||
(i >= '0' && i <= '9') ||
i == '_' || i == '-' || i == '\''))
return false;
return true;
}
std::ostream &
printAttributeName(std::ostream & str, std::string_view name) {
if (isVarName(name))
str << name;
else
printLiteralString(str, name);
return str;
}
}

48
src/libexpr/print.hh Normal file
View file

@ -0,0 +1,48 @@
#pragma once
/**
* @file
* @brief Common printing functions for the Nix language
*
* While most types come with their own methods for printing, they share some
* functions that are placed here.
*/
#include <iostream>
namespace nix {
/**
* Print a string as a Nix string literal.
*
* Quotes and fairly minimal escaping are added.
*
* @param s The logical string
*/
std::ostream & printLiteralString(std::ostream & o, std::string_view s);
inline std::ostream & printLiteralString(std::ostream & o, const char * s) {
return printLiteralString(o, std::string_view(s));
}
inline std::ostream & printLiteralString(std::ostream & o, const std::string & s) {
return printLiteralString(o, std::string_view(s));
}
/** Print `true` or `false`. */
std::ostream & printLiteralBool(std::ostream & o, bool b);
/**
* Print a string as an attribute name in the Nix expression language syntax.
*
* Prints a quoted string if necessary.
*/
std::ostream & printAttributeName(std::ostream & o, std::string_view s);
/**
* Print a string as an identifier in the Nix expression language syntax.
*
* FIXME: "identifier" is ambiguous. Identifiers do not have a single
* textual representation. They can be used in variable references,
* let bindings, left-hand sides or attribute names in a select
* expression, or something else entirely, like JSON. Use one of the
* `print*` functions instead.
*/
std::ostream & printIdentifier(std::ostream & o, std::string_view s);
}

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <list> #include <list>
#include <map> #include <map>
@ -9,15 +10,11 @@
namespace nix { namespace nix {
/* Symbol table used by the parser and evaluator to represent and look /**
up identifiers and attributes efficiently. SymbolTable::create() * This class mainly exists to give us an operator<< for ostreams. We could also
converts a string into a symbol. Symbols have the property that * return plain strings from SymbolTable, but then we'd have to wrap every
they can be compared efficiently (using an equality test), * instance of a symbol that is fmt()ed, which is inconvenient and error-prone.
because the symbol table stores only one copy of each string. */ */
/* This class mainly exists to give us an operator<< for ostreams. We could also
return plain strings from SymbolTable, but then we'd have to wrap every
instance of a symbol that is fmt()ed, which is inconvenient and error-prone. */
class SymbolStr class SymbolStr
{ {
friend class SymbolTable; friend class SymbolTable;
@ -46,6 +43,11 @@ public:
friend std::ostream & operator <<(std::ostream & os, const SymbolStr & symbol); friend std::ostream & operator <<(std::ostream & os, const SymbolStr & symbol);
}; };
/**
* Symbols have the property that they can be compared efficiently
* (using an equality test), because the symbol table stores only one
* copy of each string.
*/
class Symbol class Symbol
{ {
friend class SymbolTable; friend class SymbolTable;
@ -65,6 +67,10 @@ public:
bool operator!=(const Symbol other) const { return id != other.id; } bool operator!=(const Symbol other) const { return id != other.id; }
}; };
/**
* Symbol table used by the parser and evaluator to represent and look
* up identifiers and attributes efficiently.
*/
class SymbolTable class SymbolTable
{ {
private: private:
@ -73,6 +79,9 @@ private:
public: public:
/**
* converts a string into a symbol.
*/
Symbol create(std::string_view s) Symbol create(std::string_view s)
{ {
// Most symbols are looked up more than once, so we trade off insertion performance // Most symbols are looked up more than once, so we trade off insertion performance

View file

@ -1,3 +1,6 @@
#pragma once
///@file
#include <gtest/gtest.h> #include <gtest/gtest.h>
#include <gmock/gmock.h> #include <gmock/gmock.h>

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <rapidcheck/gen/Arbitrary.h> #include <rapidcheck/gen/Arbitrary.h>

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "nixexpr.hh" #include "nixexpr.hh"
#include "eval.hh" #include "eval.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "nixexpr.hh" #include "nixexpr.hh"
#include "eval.hh" #include "eval.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <cassert> #include <cassert>
@ -35,9 +36,11 @@ typedef enum {
tFloat tFloat
} InternalType; } InternalType;
// This type abstracts over all actual value types in the language, /**
// grouping together implementation details like tList*, different function * This type abstracts over all actual value types in the language,
// types, and types in non-normal form (so thunks and co.) * grouping together implementation details like tList*, different function
* types, and types in non-normal form (so thunks and co.)
*/
typedef enum { typedef enum {
nThunk, nThunk,
nInt, nInt,
@ -69,38 +72,51 @@ class XMLWriter;
typedef int64_t NixInt; typedef int64_t NixInt;
typedef double NixFloat; typedef double NixFloat;
/* External values must descend from ExternalValueBase, so that /**
* External values must descend from ExternalValueBase, so that
* type-agnostic nix functions (e.g. showType) can be implemented * type-agnostic nix functions (e.g. showType) can be implemented
*/ */
class ExternalValueBase class ExternalValueBase
{ {
friend std::ostream & operator << (std::ostream & str, const ExternalValueBase & v); friend std::ostream & operator << (std::ostream & str, const ExternalValueBase & v);
protected: protected:
/* Print out the value */ /**
* Print out the value
*/
virtual std::ostream & print(std::ostream & str) const = 0; virtual std::ostream & print(std::ostream & str) const = 0;
public: public:
/* Return a simple string describing the type */ /**
* Return a simple string describing the type
*/
virtual std::string showType() const = 0; virtual std::string showType() const = 0;
/* Return a string to be used in builtins.typeOf */ /**
* Return a string to be used in builtins.typeOf
*/
virtual std::string typeOf() const = 0; virtual std::string typeOf() const = 0;
/* Coerce the value to a string. Defaults to uncoercable, i.e. throws an /**
* Coerce the value to a string. Defaults to uncoercable, i.e. throws an
* error. * error.
*/ */
virtual std::string coerceToString(const Pos & pos, PathSet & context, bool copyMore, bool copyToStore) const; virtual std::string coerceToString(const Pos & pos, PathSet & context, bool copyMore, bool copyToStore) const;
/* Compare to another value of the same type. Defaults to uncomparable, /**
* Compare to another value of the same type. Defaults to uncomparable,
* i.e. always false. * i.e. always false.
*/ */
virtual bool operator ==(const ExternalValueBase & b) const; virtual bool operator ==(const ExternalValueBase & b) const;
/* Print the value as JSON. Defaults to unconvertable, i.e. throws an error */ /**
* Print the value as JSON. Defaults to unconvertable, i.e. throws an error
*/
virtual nlohmann::json printValueAsJSON(EvalState & state, bool strict, virtual nlohmann::json printValueAsJSON(EvalState & state, bool strict,
PathSet & context, bool copyToStore = true) const; PathSet & context, bool copyToStore = true) const;
/* Print the value as XML. Defaults to unevaluated */ /**
* Print the value as XML. Defaults to unevaluated
*/
virtual void printValueAsXML(EvalState & state, bool strict, bool location, virtual void printValueAsXML(EvalState & state, bool strict, bool location,
XMLWriter & doc, PathSet & context, PathSet & drvsSeen, XMLWriter & doc, PathSet & context, PathSet & drvsSeen,
const PosIdx pos) const; const PosIdx pos) const;
@ -145,26 +161,28 @@ public:
NixInt integer; NixInt integer;
bool boolean; bool boolean;
/* Strings in the evaluator carry a so-called `context' which /**
is a list of strings representing store paths. This is to * Strings in the evaluator carry a so-called `context` which
allow users to write things like * is a list of strings representing store paths. This is to
* allow users to write things like
"--with-freetype2-library=" + freetype + "/lib" * "--with-freetype2-library=" + freetype + "/lib"
where `freetype' is a derivation (or a source to be copied * where `freetype` is a derivation (or a source to be copied
to the store). If we just concatenated the strings without * to the store). If we just concatenated the strings without
keeping track of the referenced store paths, then if the * keeping track of the referenced store paths, then if the
string is used as a derivation attribute, the derivation * string is used as a derivation attribute, the derivation
will not have the correct dependencies in its inputDrvs and * will not have the correct dependencies in its inputDrvs and
inputSrcs. * inputSrcs.
The semantics of the context is as follows: when a string * The semantics of the context is as follows: when a string
with context C is used as a derivation attribute, then the * with context C is used as a derivation attribute, then the
derivations in C will be added to the inputDrvs of the * derivations in C will be added to the inputDrvs of the
derivation, and the other store paths in C will be added to * derivation, and the other store paths in C will be added to
the inputSrcs of the derivations. * the inputSrcs of the derivations.
For canonicity, the store paths should be in sorted order. */ * For canonicity, the store paths should be in sorted order.
*/
struct { struct {
const char * s; const char * s;
const char * * context; // must be in sorted order const char * * context; // must be in sorted order
@ -196,8 +214,10 @@ public:
NixFloat fpoint; NixFloat fpoint;
}; };
// Returns the normal type of a Value. This only returns nThunk if the /**
// Value hasn't been forceValue'd * Returns the normal type of a Value. This only returns nThunk if
* the Value hasn't been forceValue'd
*/
inline ValueType type() const inline ValueType type() const
{ {
switch (internalType) { switch (internalType) {
@ -216,8 +236,10 @@ public:
abort(); abort();
} }
/* After overwriting an app node, be sure to clear pointers in the /**
Value to ensure that the target isn't kept alive unnecessarily. */ * After overwriting an app node, be sure to clear pointers in the
* Value to ensure that the target isn't kept alive unnecessarily.
*/
inline void clearValue() inline void clearValue()
{ {
app.left = app.right = 0; app.left = app.right = 0;
@ -365,9 +387,11 @@ public:
PosIdx determinePos(const PosIdx pos) const; PosIdx determinePos(const PosIdx pos) const;
/* Check whether forcing this value requires a trivial amount of /**
computation. In particular, function applications are * Check whether forcing this value requires a trivial amount of
non-trivial. */ * computation. In particular, function applications are
* non-trivial.
*/
bool isTrivial() const; bool isTrivial() const;
NixStringContext getContext(const Store &); NixStringContext getContext(const Store &);
@ -413,7 +437,9 @@ typedef std::map<Symbol, ValueVector> ValueVectorMap;
#endif #endif
/* A value allocated in traceable memory. */ /**
* A value allocated in traceable memory.
*/
typedef std::shared_ptr<Value *> RootValue; typedef std::shared_ptr<Value *> RootValue;
RootValue allocRootValue(Value * v); RootValue allocRootValue(Value * v);

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "util.hh" #include "util.hh"
#include "comparator.hh" #include "comparator.hh"
@ -27,34 +28,37 @@ public:
class Store; class Store;
/* Plain opaque path to some store object. /**
* Plain opaque path to some store object.
Encoded as just the path: <path>. *
*/ * Encoded as just the path: <path>.
*/
struct NixStringContextElem_Opaque { struct NixStringContextElem_Opaque {
StorePath path; StorePath path;
GENERATE_CMP(NixStringContextElem_Opaque, me->path); GENERATE_CMP(NixStringContextElem_Opaque, me->path);
}; };
/* Path to a derivation and its entire build closure. /**
* Path to a derivation and its entire build closure.
The path doesn't just refer to derivation itself and its closure, but *
also all outputs of all derivations in that closure (including the * The path doesn't just refer to derivation itself and its closure, but
root derivation). * also all outputs of all derivations in that closure (including the
* root derivation).
Encoded in the form =<drvPath>. *
*/ * Encoded in the form =<drvPath>.
*/
struct NixStringContextElem_DrvDeep { struct NixStringContextElem_DrvDeep {
StorePath drvPath; StorePath drvPath;
GENERATE_CMP(NixStringContextElem_DrvDeep, me->drvPath); GENERATE_CMP(NixStringContextElem_DrvDeep, me->drvPath);
}; };
/* Derivation output. /**
* Derivation output.
Encoded in the form !<output>!<drvPath>. *
*/ * Encoded in the form !<output>!<drvPath>.
*/
struct NixStringContextElem_Built { struct NixStringContextElem_Built {
StorePath drvPath; StorePath drvPath;
std::string output; std::string output;
@ -83,10 +87,11 @@ struct NixStringContextElem : _NixStringContextElem_Raw {
return static_cast<Raw &>(*this); return static_cast<Raw &>(*this);
} }
/* Decode a context string, one of: /**
- <path> * Decode a context string, one of:
- =<path> * - <path>
- !<name>!<path> * - =<path>
* - !<name>!<path>
*/ */
static NixStringContextElem parse(const Store & store, std::string_view s); static NixStringContextElem parse(const Store & store, std::string_view s);
std::string to_string(const Store & store) const; std::string to_string(const Store & store) const;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "fetchers.hh" #include "fetchers.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "config.hh" #include "config.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "hash.hh" #include "hash.hh"
@ -20,14 +21,14 @@ struct Tree
struct InputScheme; struct InputScheme;
/* The Input object is generated by a specific fetcher, based on the /**
* The Input object is generated by a specific fetcher, based on the
* user-supplied input attribute in the flake.nix file, and contains * user-supplied input attribute in the flake.nix file, and contains
* the information that the specific fetcher needs to perform the * the information that the specific fetcher needs to perform the
* actual fetch. The Input object is most commonly created via the * actual fetch. The Input object is most commonly created via the
* "fromURL()" or "fromAttrs()" static functions which are provided * "fromURL()" or "fromAttrs()" static functions which are provided
* the url or attrset specified in the flake file. * the url or attrset specified in the flake file.
*/ */
struct Input struct Input
{ {
friend struct InputScheme; friend struct InputScheme;
@ -37,7 +38,9 @@ struct Input
bool locked = false; bool locked = false;
bool direct = true; bool direct = true;
/* path of the parent of this input, used for relative path resolution */ /**
* path of the parent of this input, used for relative path resolution
*/
std::optional<Path> parent; std::optional<Path> parent;
public: public:
@ -55,27 +58,35 @@ public:
Attrs toAttrs() const; Attrs toAttrs() const;
/* Check whether this is a "direct" input, that is, not /**
one that goes through a registry. */ * Check whether this is a "direct" input, that is, not
* one that goes through a registry.
*/
bool isDirect() const { return direct; } bool isDirect() const { return direct; }
/* Check whether this is a "locked" input, that is, /**
one that contains a commit hash or content hash. */ * Check whether this is a "locked" input, that is,
* one that contains a commit hash or content hash.
*/
bool isLocked() const { return locked; } bool isLocked() const { return locked; }
/* Check whether the input carries all necessary info required /**
for cache insertion and substitution. * Check whether the input carries all necessary info required
These fields are used to uniquely identify cached trees * for cache insertion and substitution.
within the "tarball TTL" window without necessarily * These fields are used to uniquely identify cached trees
indicating that the input's origin is unchanged. */ * within the "tarball TTL" window without necessarily
* indicating that the input's origin is unchanged.
*/
bool hasAllInfo() const; bool hasAllInfo() const;
bool operator ==(const Input & other) const; bool operator ==(const Input & other) const;
bool contains(const Input & other) const; bool contains(const Input & other) const;
/* Fetch the input into the Nix store, returning the location in /**
the Nix store and the locked input. */ * Fetch the input into the Nix store, returning the location in
* the Nix store and the locked input.
*/
std::pair<Tree, Input> fetch(ref<Store> store) const; std::pair<Tree, Input> fetch(ref<Store> store) const;
Input applyOverrides( Input applyOverrides(
@ -104,7 +115,8 @@ public:
}; };
/* The InputScheme represents a type of fetcher. Each fetcher /**
* The InputScheme represents a type of fetcher. Each fetcher
* registers with nix at startup time. When processing an input for a * registers with nix at startup time. When processing an input for a
* flake, each scheme is given an opportunity to "recognize" that * flake, each scheme is given an opportunity to "recognize" that
* input from the url or attributes in the flake file's specification * input from the url or attributes in the flake file's specification

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "fetchers.hh" #include "fetchers.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "args.hh" #include "args.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"

View file

@ -72,6 +72,7 @@ private:
uint64_t corruptedPaths = 0, untrustedPaths = 0; uint64_t corruptedPaths = 0, untrustedPaths = 0;
bool active = true; bool active = true;
bool paused = false;
bool haveUpdate = true; bool haveUpdate = true;
}; };
@ -120,6 +121,18 @@ public:
updateThread.join(); updateThread.join();
} }
void pause() override {
state_.lock()->paused = true;
writeToStderr("\r\e[K");
}
void resume() override {
state_.lock()->paused = false;
writeToStderr("\r\e[K");
state_.lock()->haveUpdate = true;
updateCV.notify_one();
}
bool isVerbose() override bool isVerbose() override
{ {
return printBuildLogs; return printBuildLogs;
@ -339,7 +352,7 @@ public:
auto nextWakeup = std::chrono::milliseconds::max(); auto nextWakeup = std::chrono::milliseconds::max();
state.haveUpdate = false; state.haveUpdate = false;
if (!state.active) return nextWakeup; if (state.paused || !state.active) return nextWakeup;
std::string line; std::string line;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "logging.hh" #include "logging.hh"

View file

@ -10,7 +10,6 @@
#include <cctype> #include <cctype>
#include <exception> #include <exception>
#include <iostream> #include <iostream>
#include <mutex>
#include <cstdlib> #include <cstdlib>
#include <sys/time.h> #include <sys/time.h>
@ -20,16 +19,9 @@
#ifdef __linux__ #ifdef __linux__
#include <features.h> #include <features.h>
#endif #endif
#ifdef __GLIBC__
#include <gnu/lib-names.h>
#include <nss.h>
#include <dlfcn.h>
#endif
#include <openssl/crypto.h> #include <openssl/crypto.h>
#include <sodium.h>
namespace nix { namespace nix {
@ -115,57 +107,6 @@ std::string getArg(const std::string & opt,
return *i; return *i;
} }
#if OPENSSL_VERSION_NUMBER < 0x10101000L
/* OpenSSL is not thread-safe by default - it will randomly crash
unless the user supplies a mutex locking function. So let's do
that. */
static std::vector<std::mutex> opensslLocks;
static void opensslLockCallback(int mode, int type, const char * file, int line)
{
if (mode & CRYPTO_LOCK)
opensslLocks[type].lock();
else
opensslLocks[type].unlock();
}
#endif
static std::once_flag dns_resolve_flag;
static void preloadNSS() {
/* builtin:fetchurl can trigger a DNS lookup, which with glibc can trigger a dynamic library load of
one of the glibc NSS libraries in a sandboxed child, which will fail unless the library's already
been loaded in the parent. So we force a lookup of an invalid domain to force the NSS machinery to
load its lookup libraries in the parent before any child gets a chance to. */
std::call_once(dns_resolve_flag, []() {
#ifdef __GLIBC__
/* On linux, glibc will run every lookup through the nss layer.
* That means every lookup goes, by default, through nscd, which acts as a local
* cache.
* Because we run builds in a sandbox, we also remove access to nscd otherwise
* lookups would leak into the sandbox.
*
* But now we have a new problem, we need to make sure the nss_dns backend that
* does the dns lookups when nscd is not available is loaded or available.
*
* We can't make it available without leaking nix's environment, so instead we'll
* load the backend, and configure nss so it does not try to run dns lookups
* through nscd.
*
* This is technically only used for builtins:fetch* functions so we only care
* about dns.
*
* All other platforms are unaffected.
*/
if (!dlopen(LIBNSS_DNS_SO, RTLD_NOW))
warn("unable to load nss_dns backend");
// FIXME: get hosts entry from nsswitch.conf.
__nss_configure_lookup("hosts", "files dns");
#endif
});
}
static void sigHandler(int signo) { } static void sigHandler(int signo) { }
@ -177,16 +118,7 @@ void initNix()
std::cerr.rdbuf()->pubsetbuf(buf, sizeof(buf)); std::cerr.rdbuf()->pubsetbuf(buf, sizeof(buf));
#endif #endif
#if OPENSSL_VERSION_NUMBER < 0x10101000L initLibStore();
/* Initialise OpenSSL locking. */
opensslLocks = std::vector<std::mutex>(CRYPTO_num_locks());
CRYPTO_set_locking_callback(opensslLockCallback);
#endif
if (sodium_init() == -1)
throw Error("could not initialise libsodium");
loadConfFile();
startSignalHandlerThread(); startSignalHandlerThread();
@ -223,7 +155,10 @@ void initNix()
if (sigaction(SIGTRAP, &act, 0)) throw SysError("handling SIGTRAP"); if (sigaction(SIGTRAP, &act, 0)) throw SysError("handling SIGTRAP");
#endif #endif
/* Register a SIGSEGV handler to detect stack overflows. */ /* Register a SIGSEGV handler to detect stack overflows.
Why not initLibExpr()? initGC() is essentially that, but
detectStackOverflow is not an instance of the init function concept, as
it may have to be invoked more than once per process. */
detectStackOverflow(); detectStackOverflow();
/* There is no privacy in the Nix system ;-) At least not for /* There is no privacy in the Nix system ;-) At least not for
@ -236,16 +171,6 @@ void initNix()
gettimeofday(&tv, 0); gettimeofday(&tv, 0);
srandom(tv.tv_usec); srandom(tv.tv_usec);
/* On macOS, don't use the per-session TMPDIR (as set e.g. by
sshd). This breaks build users because they don't have access
to the TMPDIR, in particular in nix-store --serve. */
#if __APPLE__
if (hasPrefix(getEnv("TMPDIR").value_or("/tmp"), "/var/folders/"))
unsetenv("TMPDIR");
#endif
preloadNSS();
initLibStore();
} }

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "util.hh" #include "util.hh"
#include "args.hh" #include "args.hh"
@ -24,7 +25,9 @@ public:
int handleExceptions(const std::string & programName, std::function<void()> fun); int handleExceptions(const std::string & programName, std::function<void()> fun);
/* Don't forget to call initPlugins() after settings are initialized! */ /**
* Don't forget to call initPlugins() after settings are initialized!
*/
void initNix(); void initNix();
void parseCmdLine(int argc, char * * argv, void parseCmdLine(int argc, char * * argv,
@ -35,7 +38,9 @@ void parseCmdLine(const std::string & programName, const Strings & args,
void printVersion(const std::string & programName); void printVersion(const std::string & programName);
/* Ugh. No better place to put this. */ /**
* Ugh. No better place to put this.
*/
void printGCWarning(); void printGCWarning();
class Store; class Store;
@ -74,11 +79,15 @@ struct LegacyArgs : public MixCommonArgs
}; };
/* Show the manual page for the specified program. */ /**
* Show the manual page for the specified program.
*/
void showManPage(const std::string & name); void showManPage(const std::string & name);
/* The constructor of this class starts a pager if stdout is a /**
terminal and $PAGER is set. Stdout is redirected to the pager. */ * The constructor of this class starts a pager if stdout is a
* terminal and $PAGER is set. Stdout is redirected to the pager.
*/
class RunPager class RunPager
{ {
public: public:
@ -109,28 +118,34 @@ struct PrintFreed
}; };
/* Install a SIGSEGV handler to detect stack overflows. */ /**
* Install a SIGSEGV handler to detect stack overflows.
*/
void detectStackOverflow(); void detectStackOverflow();
/* Pluggable behavior to run in case of a stack overflow. /**
* Pluggable behavior to run in case of a stack overflow.
Default value: defaultStackOverflowHandler. *
* Default value: defaultStackOverflowHandler.
This is called by the handler installed by detectStackOverflow(). *
* This is called by the handler installed by detectStackOverflow().
This gives Nix library consumers a limit opportunity to report the error *
condition. The handler should exit the process. * This gives Nix library consumers a limit opportunity to report the error
See defaultStackOverflowHandler() for a reference implementation. * condition. The handler should exit the process.
* See defaultStackOverflowHandler() for a reference implementation.
NOTE: Use with diligence, because this runs in the signal handler, with very *
limited stack space and a potentially a corrupted heap, all while the failed * NOTE: Use with diligence, because this runs in the signal handler, with very
thread is blocked indefinitely. All functions called must be reentrant. */ * limited stack space and a potentially a corrupted heap, all while the failed
* thread is blocked indefinitely. All functions called must be reentrant.
*/
extern std::function<void(siginfo_t * info, void * ctx)> stackOverflowHandler; extern std::function<void(siginfo_t * info, void * ctx)> stackOverflowHandler;
/* The default, robust implementation of stackOverflowHandler. /**
* The default, robust implementation of stackOverflowHandler.
Prints an error message directly to stderr using a syscall instead of the *
logger. Exits the process immediately after. */ * Prints an error message directly to stderr using a syscall instead of the
* logger. Exits the process immediately after.
*/
void defaultStackOverflowHandler(siginfo_t * info, void * ctx); void defaultStackOverflowHandler(siginfo_t * info, void * ctx);
} }

View file

@ -315,6 +315,7 @@ StorePath BinaryCacheStore::addToStoreFromDump(Source & dump, std::string_view n
}, },
.references = { .references = {
.others = references, .others = references,
// caller is not capable of creating a self-reference, because this is content-addressed without modulus
.self = false, .self = false,
}, },
}, },
@ -433,6 +434,7 @@ StorePath BinaryCacheStore::addToStore(
}, },
.references = { .references = {
.others = references, .others = references,
// caller is not capable of creating a self-reference, because this is content-addressed without modulus
.self = false, .self = false,
}, },
}, },

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "crypto.hh" #include "crypto.hh"
#include "store-api.hh" #include "store-api.hh"
@ -45,6 +46,11 @@ struct BinaryCacheStoreConfig : virtual StoreConfig
)"}; )"};
}; };
/**
* @note subclasses must implement at least one of the two
* virtual getFile() methods.
*/
class BinaryCacheStore : public virtual BinaryCacheStoreConfig, class BinaryCacheStore : public virtual BinaryCacheStoreConfig,
public virtual Store, public virtual Store,
public virtual LogStore public virtual LogStore
@ -74,14 +80,15 @@ public:
std::string && data, std::string && data,
const std::string & mimeType); const std::string & mimeType);
/* Note: subclasses must implement at least one of the two /**
following getFile() methods. */ * Dump the contents of the specified file to a sink.
*/
/* Dump the contents of the specified file to a sink. */
virtual void getFile(const std::string & path, Sink & sink); virtual void getFile(const std::string & path, Sink & sink);
/* Fetch the specified file and call the specified callback with /**
the result. A subclass may implement this asynchronously. */ * Fetch the specified file and call the specified callback with
* the result. A subclass may implement this asynchronously.
*/
virtual void getFile( virtual void getFile(
const std::string & path, const std::string & path,
Callback<std::optional<std::string>> callback) noexcept; Callback<std::optional<std::string>> callback) noexcept;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "realisation.hh" #include "realisation.hh"
#include "derived-path.hh" #include "derived-path.hh"
@ -11,9 +12,12 @@ namespace nix {
struct BuildResult struct BuildResult
{ {
/* Note: don't remove status codes, and only add new status codes /**
at the end of the list, to prevent client/server * @note This is directly used in the nix-store --serve protocol.
incompatibilities in the nix-store --serve protocol. */ * That means we need to worry about compatability across versions.
* Therefore, don't remove status codes, and only add new status
* codes at the end of the list.
*/
enum Status { enum Status {
Built = 0, Built = 0,
Substituted, Substituted,
@ -21,8 +25,10 @@ struct BuildResult
PermanentFailure, PermanentFailure,
InputRejected, InputRejected,
OutputRejected, OutputRejected,
TransientFailure, // possibly transient /// possibly transient
CachedFailure, // no longer used TransientFailure,
/// no longer used
CachedFailure,
TimedOut, TimedOut,
MiscFailure, MiscFailure,
DependencyFailed, DependencyFailed,
@ -32,7 +38,12 @@ struct BuildResult
NoSubstituters, NoSubstituters,
} status = MiscFailure; } status = MiscFailure;
// FIXME: include entire ErrorInfo object. /**
* Information about the error if the build failed.
*
* @todo This should be an entire ErrorInfo object, not just a
* string, for richer information.
*/
std::string errorMsg; std::string errorMsg;
std::string toString() const { std::string toString() const {
@ -52,33 +63,46 @@ struct BuildResult
case LogLimitExceeded: return "LogLimitExceeded"; case LogLimitExceeded: return "LogLimitExceeded";
case NotDeterministic: return "NotDeterministic"; case NotDeterministic: return "NotDeterministic";
case ResolvesToAlreadyValid: return "ResolvesToAlreadyValid"; case ResolvesToAlreadyValid: return "ResolvesToAlreadyValid";
case NoSubstituters: return "NoSubstituters";
default: return "Unknown"; default: return "Unknown";
}; };
}(); }();
return strStatus + ((errorMsg == "") ? "" : " : " + errorMsg); return strStatus + ((errorMsg == "") ? "" : " : " + errorMsg);
} }
/* How many times this build was performed. */ /**
* How many times this build was performed.
*/
unsigned int timesBuilt = 0; unsigned int timesBuilt = 0;
/* If timesBuilt > 1, whether some builds did not produce the same /**
result. (Note that 'isNonDeterministic = false' does not mean * If timesBuilt > 1, whether some builds did not produce the same
the build is deterministic, just that we don't have evidence of * result. (Note that 'isNonDeterministic = false' does not mean
non-determinism.) */ * the build is deterministic, just that we don't have evidence of
* non-determinism.)
*/
bool isNonDeterministic = false; bool isNonDeterministic = false;
/* The derivation we built or the store path we substituted. */ /**
* The derivation we built or the store path we substituted.
*/
DerivedPath path; DerivedPath path;
/* For derivations, a mapping from the names of the wanted outputs /**
to actual paths. */ * For derivations, a mapping from the names of the wanted outputs
* to actual paths.
*/
DrvOutputs builtOutputs; DrvOutputs builtOutputs;
/* The start/stop times of the build (or one of the rounds, if it /**
was repeated). */ * The start/stop times of the build (or one of the rounds, if it
* was repeated).
*/
time_t startTime = 0, stopTime = 0; time_t startTime = 0, stopTime = 0;
/* User and system CPU time the build took. */ /**
* User and system CPU time the build took.
*/
std::optional<std::chrono::microseconds> cpuUser, cpuSystem; std::optional<std::chrono::microseconds> cpuUser, cpuSystem;
bool success() bool success()

View file

@ -911,7 +911,11 @@ void DerivationGoal::buildDone()
msg += line; msg += line;
msg += "\n"; msg += "\n";
} }
msg += fmt("For full logs, run '" ANSI_BOLD "nix log %s" ANSI_NORMAL "'.", auto nixLogCommand = experimentalFeatureSettings.isEnabled(Xp::NixCommand)
? "nix log"
: "nix-store -l";
msg += fmt("For full logs, run '" ANSI_BOLD "%s %s" ANSI_NORMAL "'.",
nixLogCommand,
worker.store.printStorePath(drvPath)); worker.store.printStorePath(drvPath));
} }

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "parsed-derivations.hh" #include "parsed-derivations.hh"
#include "lock.hh" #include "lock.hh"
@ -15,8 +16,10 @@ struct HookInstance;
typedef enum {rpAccept, rpDecline, rpPostpone} HookReply; typedef enum {rpAccept, rpDecline, rpPostpone} HookReply;
/* Unless we are repairing, we don't both to test validity and just assume it, /**
so the choices are `Absent` or `Valid`. */ * Unless we are repairing, we don't both to test validity and just assume it,
* so the choices are `Absent` or `Valid`.
*/
enum struct PathStatus { enum struct PathStatus {
Corrupt, Corrupt,
Absent, Absent,
@ -26,11 +29,15 @@ enum struct PathStatus {
struct InitialOutputStatus { struct InitialOutputStatus {
StorePath path; StorePath path;
PathStatus status; PathStatus status;
/* Valid in the store, and additionally non-corrupt if we are repairing */ /**
* Valid in the store, and additionally non-corrupt if we are repairing
*/
bool isValid() const { bool isValid() const {
return status == PathStatus::Valid; return status == PathStatus::Valid;
} }
/* Merely present, allowed to be corrupt */ /**
* Merely present, allowed to be corrupt
*/
bool isPresent() const { bool isPresent() const {
return status == PathStatus::Corrupt return status == PathStatus::Corrupt
|| status == PathStatus::Valid; || status == PathStatus::Valid;
@ -45,59 +52,87 @@ struct InitialOutput {
struct DerivationGoal : public Goal struct DerivationGoal : public Goal
{ {
/* Whether to use an on-disk .drv file. */ /**
* Whether to use an on-disk .drv file.
*/
bool useDerivation; bool useDerivation;
/* The path of the derivation. */ /** The path of the derivation. */
StorePath drvPath; StorePath drvPath;
/* The goal for the corresponding resolved derivation */ /**
* The goal for the corresponding resolved derivation
*/
std::shared_ptr<DerivationGoal> resolvedDrvGoal; std::shared_ptr<DerivationGoal> resolvedDrvGoal;
/* The specific outputs that we need to build. Empty means all of /**
them. */ * The specific outputs that we need to build. Empty means all of
* them.
*/
OutputsSpec wantedOutputs; OutputsSpec wantedOutputs;
/* Mapping from input derivations + output names to actual store /**
paths. This is filled in by waiteeDone() as each dependency * Mapping from input derivations + output names to actual store
finishes, before inputsRealised() is reached, */ * paths. This is filled in by waiteeDone() as each dependency
* finishes, before inputsRealised() is reached.
*/
std::map<std::pair<StorePath, std::string>, StorePath> inputDrvOutputs; std::map<std::pair<StorePath, std::string>, StorePath> inputDrvOutputs;
/* Whether additional wanted outputs have been added. */ /**
* Whether additional wanted outputs have been added.
*/
bool needRestart = false; bool needRestart = false;
/* Whether to retry substituting the outputs after building the /**
inputs. This is done in case of an incomplete closure. */ * Whether to retry substituting the outputs after building the
* inputs. This is done in case of an incomplete closure.
*/
bool retrySubstitution = false; bool retrySubstitution = false;
/* Whether we've retried substitution, in which case we won't try /**
again. */ * Whether we've retried substitution, in which case we won't try
* again.
*/
bool retriedSubstitution = false; bool retriedSubstitution = false;
/* The derivation stored at drvPath. */ /**
* The derivation stored at drvPath.
*/
std::unique_ptr<Derivation> drv; std::unique_ptr<Derivation> drv;
std::unique_ptr<ParsedDerivation> parsedDrv; std::unique_ptr<ParsedDerivation> parsedDrv;
/* The remainder is state held during the build. */ /**
* The remainder is state held during the build.
*/
/* Locks on (fixed) output paths. */ /**
* Locks on (fixed) output paths.
*/
PathLocks outputLocks; PathLocks outputLocks;
/* All input paths (that is, the union of FS closures of the /**
immediate input paths). */ * All input paths (that is, the union of FS closures of the
* immediate input paths).
*/
StorePathSet inputPaths; StorePathSet inputPaths;
std::map<std::string, InitialOutput> initialOutputs; std::map<std::string, InitialOutput> initialOutputs;
/* File descriptor for the log file. */ /**
* File descriptor for the log file.
*/
AutoCloseFD fdLogFile; AutoCloseFD fdLogFile;
std::shared_ptr<BufferedSink> logFileSink, logSink; std::shared_ptr<BufferedSink> logFileSink, logSink;
/* Number of bytes received from the builder's stdout/stderr. */ /**
* Number of bytes received from the builder's stdout/stderr.
*/
unsigned long logSize; unsigned long logSize;
/* The most recent log lines. */ /**
* The most recent log lines.
*/
std::list<std::string> logTail; std::list<std::string> logTail;
std::string currentLogLine; std::string currentLogLine;
@ -105,10 +140,14 @@ struct DerivationGoal : public Goal
std::string currentHookLine; std::string currentHookLine;
/* The build hook. */ /**
* The build hook.
*/
std::unique_ptr<HookInstance> hook; std::unique_ptr<HookInstance> hook;
/* The sort of derivation we are building. */ /**
* The sort of derivation we are building.
*/
DerivationType derivationType; DerivationType derivationType;
typedef void (DerivationGoal::*GoalState)(); typedef void (DerivationGoal::*GoalState)();
@ -120,12 +159,16 @@ struct DerivationGoal : public Goal
std::unique_ptr<Activity> act; std::unique_ptr<Activity> act;
/* Activity that denotes waiting for a lock. */ /**
* Activity that denotes waiting for a lock.
*/
std::unique_ptr<Activity> actLock; std::unique_ptr<Activity> actLock;
std::map<ActivityId, Activity> builderActivities; std::map<ActivityId, Activity> builderActivities;
/* The remote machine on which we're building. */ /**
* The remote machine on which we're building.
*/
std::string machineName; std::string machineName;
DerivationGoal(const StorePath & drvPath, DerivationGoal(const StorePath & drvPath,
@ -142,10 +185,14 @@ struct DerivationGoal : public Goal
void work() override; void work() override;
/* Add wanted outputs to an already existing derivation goal. */ /**
* Add wanted outputs to an already existing derivation goal.
*/
void addWantedOutputs(const OutputsSpec & outputs); void addWantedOutputs(const OutputsSpec & outputs);
/* The states. */ /**
* The states.
*/
void getDerivation(); void getDerivation();
void loadDerivation(); void loadDerivation();
void haveDerivation(); void haveDerivation();
@ -159,28 +206,42 @@ struct DerivationGoal : public Goal
void resolvedFinished(); void resolvedFinished();
/* Is the build hook willing to perform the build? */ /**
* Is the build hook willing to perform the build?
*/
HookReply tryBuildHook(); HookReply tryBuildHook();
virtual int getChildStatus(); virtual int getChildStatus();
/* Check that the derivation outputs all exist and register them /**
as valid. */ * Check that the derivation outputs all exist and register them
* as valid.
*/
virtual DrvOutputs registerOutputs(); virtual DrvOutputs registerOutputs();
/* Open a log file and a pipe to it. */ /**
* Open a log file and a pipe to it.
*/
Path openLogFile(); Path openLogFile();
/* Sign the newly built realisation if the store allows it */ /**
* Sign the newly built realisation if the store allows it
*/
virtual void signRealisation(Realisation&) {} virtual void signRealisation(Realisation&) {}
/* Close the log file. */ /**
* Close the log file.
*/
void closeLogFile(); void closeLogFile();
/* Close the read side of the logger pipe. */ /**
* Close the read side of the logger pipe.
*/
virtual void closeReadPipes(); virtual void closeReadPipes();
/* Cleanup hooks for buildDone() */ /**
* Cleanup hooks for buildDone()
*/
virtual void cleanupHookFinally(); virtual void cleanupHookFinally();
virtual void cleanupPreChildKill(); virtual void cleanupPreChildKill();
virtual void cleanupPostChildKill(); virtual void cleanupPostChildKill();
@ -190,30 +251,40 @@ struct DerivationGoal : public Goal
virtual bool isReadDesc(int fd); virtual bool isReadDesc(int fd);
/* Callback used by the worker to write to the log. */ /**
* Callback used by the worker to write to the log.
*/
void handleChildOutput(int fd, std::string_view data) override; void handleChildOutput(int fd, std::string_view data) override;
void handleEOF(int fd) override; void handleEOF(int fd) override;
void flushLine(); void flushLine();
/* Wrappers around the corresponding Store methods that first consult the /**
derivation. This is currently needed because when there is no drv file * Wrappers around the corresponding Store methods that first consult the
there also is no DB entry. */ * derivation. This is currently needed because when there is no drv file
* there also is no DB entry.
*/
std::map<std::string, std::optional<StorePath>> queryPartialDerivationOutputMap(); std::map<std::string, std::optional<StorePath>> queryPartialDerivationOutputMap();
OutputPathMap queryDerivationOutputMap(); OutputPathMap queryDerivationOutputMap();
/* Update 'initialOutputs' to determine the current status of the /**
outputs of the derivation. Also returns a Boolean denoting * Update 'initialOutputs' to determine the current status of the
whether all outputs are valid and non-corrupt, and a * outputs of the derivation. Also returns a Boolean denoting
'DrvOutputs' structure containing the valid and wanted * whether all outputs are valid and non-corrupt, and a
outputs. */ * 'DrvOutputs' structure containing the valid and wanted
* outputs.
*/
std::pair<bool, DrvOutputs> checkPathValidity(); std::pair<bool, DrvOutputs> checkPathValidity();
/* Aborts if any output is not valid or corrupt, and otherwise /**
returns a 'DrvOutputs' structure containing the wanted * Aborts if any output is not valid or corrupt, and otherwise
outputs. */ * returns a 'DrvOutputs' structure containing the wanted
* outputs.
*/
DrvOutputs assertPathValidity(); DrvOutputs assertPathValidity();
/* Forcibly kill the child process, if any. */ /**
* Forcibly kill the child process, if any.
*/
virtual void killChild(); virtual void killChild();
void repairClosure(); void repairClosure();

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "store-api.hh" #include "store-api.hh"
#include "goal.hh" #include "goal.hh"
@ -10,24 +11,34 @@ namespace nix {
class Worker; class Worker;
// Substitution of a derivation output. /**
// This is done in three steps: * Substitution of a derivation output.
// 1. Fetch the output info from a substituter * This is done in three steps:
// 2. Substitute the corresponding output path * 1. Fetch the output info from a substituter
// 3. Register the output info * 2. Substitute the corresponding output path
* 3. Register the output info
*/
class DrvOutputSubstitutionGoal : public Goal { class DrvOutputSubstitutionGoal : public Goal {
// The drv output we're trying to substitue /**
* The drv output we're trying to substitue
*/
DrvOutput id; DrvOutput id;
// The realisation corresponding to the given output id. /**
// Will be filled once we can get it. * The realisation corresponding to the given output id.
* Will be filled once we can get it.
*/
std::shared_ptr<const Realisation> outputInfo; std::shared_ptr<const Realisation> outputInfo;
/* The remaining substituters. */ /**
* The remaining substituters.
*/
std::list<ref<Store>> subs; std::list<ref<Store>> subs;
/* The current substituter. */ /**
* The current substituter.
*/
std::shared_ptr<Store> sub; std::shared_ptr<Store> sub;
struct DownloadState struct DownloadState
@ -38,7 +49,9 @@ class DrvOutputSubstitutionGoal : public Goal {
std::shared_ptr<DownloadState> downloadState; std::shared_ptr<DownloadState> downloadState;
/* Whether a substituter failed. */ /**
* Whether a substituter failed.
*/
bool substituterFailed = false; bool substituterFailed = false;
public: public:

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "store-api.hh" #include "store-api.hh"
@ -6,11 +7,15 @@
namespace nix { namespace nix {
/* Forward definition. */ /**
* Forward definition.
*/
struct Goal; struct Goal;
class Worker; class Worker;
/* A pointer to a goal. */ /**
* A pointer to a goal.
*/
typedef std::shared_ptr<Goal> GoalPtr; typedef std::shared_ptr<Goal> GoalPtr;
typedef std::weak_ptr<Goal> WeakGoalPtr; typedef std::weak_ptr<Goal> WeakGoalPtr;
@ -18,48 +23,72 @@ struct CompareGoalPtrs {
bool operator() (const GoalPtr & a, const GoalPtr & b) const; bool operator() (const GoalPtr & a, const GoalPtr & b) const;
}; };
/* Set of goals. */ /**
* Set of goals.
*/
typedef std::set<GoalPtr, CompareGoalPtrs> Goals; typedef std::set<GoalPtr, CompareGoalPtrs> Goals;
typedef std::set<WeakGoalPtr, std::owner_less<WeakGoalPtr>> WeakGoals; typedef std::set<WeakGoalPtr, std::owner_less<WeakGoalPtr>> WeakGoals;
/* A map of paths to goals (and the other way around). */ /**
* A map of paths to goals (and the other way around).
*/
typedef std::map<StorePath, WeakGoalPtr> WeakGoalMap; typedef std::map<StorePath, WeakGoalPtr> WeakGoalMap;
struct Goal : public std::enable_shared_from_this<Goal> struct Goal : public std::enable_shared_from_this<Goal>
{ {
typedef enum {ecBusy, ecSuccess, ecFailed, ecNoSubstituters, ecIncompleteClosure} ExitCode; typedef enum {ecBusy, ecSuccess, ecFailed, ecNoSubstituters, ecIncompleteClosure} ExitCode;
/* Backlink to the worker. */ /**
* Backlink to the worker.
*/
Worker & worker; Worker & worker;
/* Goals that this goal is waiting for. */ /**
* Goals that this goal is waiting for.
*/
Goals waitees; Goals waitees;
/* Goals waiting for this one to finish. Must use weak pointers /**
here to prevent cycles. */ * Goals waiting for this one to finish. Must use weak pointers
* here to prevent cycles.
*/
WeakGoals waiters; WeakGoals waiters;
/* Number of goals we are/were waiting for that have failed. */ /**
* Number of goals we are/were waiting for that have failed.
*/
size_t nrFailed = 0; size_t nrFailed = 0;
/* Number of substitution goals we are/were waiting for that /**
failed because there are no substituters. */ * Number of substitution goals we are/were waiting for that
* failed because there are no substituters.
*/
size_t nrNoSubstituters = 0; size_t nrNoSubstituters = 0;
/* Number of substitution goals we are/were waiting for that /**
failed because they had unsubstitutable references. */ * Number of substitution goals we are/were waiting for that
* failed because they had unsubstitutable references.
*/
size_t nrIncompleteClosure = 0; size_t nrIncompleteClosure = 0;
/* Name of this goal for debugging purposes. */ /**
* Name of this goal for debugging purposes.
*/
std::string name; std::string name;
/* Whether the goal is finished. */ /**
* Whether the goal is finished.
*/
ExitCode exitCode = ecBusy; ExitCode exitCode = ecBusy;
/* Build result. */ /**
* Build result.
*/
BuildResult buildResult; BuildResult buildResult;
/* Exception containing an error message, if any. */ /**
* Exception containing an error message, if any.
*/
std::optional<Error> ex; std::optional<Error> ex;
Goal(Worker & worker, DerivedPath path) Goal(Worker & worker, DerivedPath path)
@ -95,9 +124,11 @@ struct Goal : public std::enable_shared_from_this<Goal>
return name; return name;
} }
/* Callback in case of a timeout. It should wake up its waiters, /**
get rid of any running child processes that are being monitored * Callback in case of a timeout. It should wake up its waiters,
by the worker (important!), etc. */ * get rid of any running child processes that are being monitored
* by the worker (important!), etc.
*/
virtual void timedOut(Error && ex) = 0; virtual void timedOut(Error && ex) = 0;
virtual std::string key() = 0; virtual std::string key() = 0;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "logging.hh" #include "logging.hh"
#include "serialise.hh" #include "serialise.hh"
@ -7,16 +8,24 @@ namespace nix {
struct HookInstance struct HookInstance
{ {
/* Pipes for talking to the build hook. */ /**
* Pipes for talking to the build hook.
*/
Pipe toHook; Pipe toHook;
/* Pipe for the hook's standard output/error. */ /**
* Pipe for the hook's standard output/error.
*/
Pipe fromHook; Pipe fromHook;
/* Pipe for the builder's standard output/error. */ /**
* Pipe for the builder's standard output/error.
*/
Pipe builderOut; Pipe builderOut;
/* The process ID of the hook. */ /**
* The process ID of the hook.
*/
Pid pid; Pid pid;
FdSink sink; FdSink sink;

View file

@ -1415,6 +1415,9 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
virtual void addBuildLog(const StorePath & path, std::string_view log) override virtual void addBuildLog(const StorePath & path, std::string_view log) override
{ unsupported("addBuildLog"); } { unsupported("addBuildLog"); }
std::optional<TrustedFlag> isTrustedClient() override
{ return NotTrusted; }
}; };
@ -1467,7 +1470,7 @@ void LocalDerivationGoal::startDaemon()
FdSink to(remote.get()); FdSink to(remote.get());
try { try {
daemon::processConnection(store, from, to, daemon::processConnection(store, from, to,
daemon::NotTrusted, daemon::Recursive); NotTrusted, daemon::Recursive);
debug("terminated daemon connection"); debug("terminated daemon connection");
} catch (SysError &) { } catch (SysError &) {
ignoreException(); ignoreException();

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "derivation-goal.hh" #include "derivation-goal.hh"
#include "local-store.hh" #include "local-store.hh"
@ -9,49 +10,75 @@ struct LocalDerivationGoal : public DerivationGoal
{ {
LocalStore & getLocalStore(); LocalStore & getLocalStore();
/* User selected for running the builder. */ /**
* User selected for running the builder.
*/
std::unique_ptr<UserLock> buildUser; std::unique_ptr<UserLock> buildUser;
/* The process ID of the builder. */ /**
* The process ID of the builder.
*/
Pid pid; Pid pid;
/* The cgroup of the builder, if any. */ /**
* The cgroup of the builder, if any.
*/
std::optional<Path> cgroup; std::optional<Path> cgroup;
/* The temporary directory. */ /**
* The temporary directory.
*/
Path tmpDir; Path tmpDir;
/* The path of the temporary directory in the sandbox. */ /**
* The path of the temporary directory in the sandbox.
*/
Path tmpDirInSandbox; Path tmpDirInSandbox;
/* Master side of the pseudoterminal used for the builder's /**
standard output/error. */ * Master side of the pseudoterminal used for the builder's
* standard output/error.
*/
AutoCloseFD builderOut; AutoCloseFD builderOut;
/* Pipe for synchronising updates to the builder namespaces. */ /**
* Pipe for synchronising updates to the builder namespaces.
*/
Pipe userNamespaceSync; Pipe userNamespaceSync;
/* The mount namespace and user namespace of the builder, used to add additional /**
paths to the sandbox as a result of recursive Nix calls. */ * The mount namespace and user namespace of the builder, used to add additional
* paths to the sandbox as a result of recursive Nix calls.
*/
AutoCloseFD sandboxMountNamespace; AutoCloseFD sandboxMountNamespace;
AutoCloseFD sandboxUserNamespace; AutoCloseFD sandboxUserNamespace;
/* On Linux, whether we're doing the build in its own user /**
namespace. */ * On Linux, whether we're doing the build in its own user
* namespace.
*/
bool usingUserNamespace = true; bool usingUserNamespace = true;
/* Whether we're currently doing a chroot build. */ /**
* Whether we're currently doing a chroot build.
*/
bool useChroot = false; bool useChroot = false;
Path chrootRootDir; Path chrootRootDir;
/* RAII object to delete the chroot directory. */ /**
* RAII object to delete the chroot directory.
*/
std::shared_ptr<AutoDelete> autoDelChroot; std::shared_ptr<AutoDelete> autoDelChroot;
/* Whether to run the build in a private network namespace. */ /**
* Whether to run the build in a private network namespace.
*/
bool privateNetwork = false; bool privateNetwork = false;
/* Stuff we need to pass to initChild(). */ /**
* Stuff we need to pass to initChild().
*/
struct ChrootPath { struct ChrootPath {
Path source; Path source;
bool optional; bool optional;
@ -70,30 +97,35 @@ struct LocalDerivationGoal : public DerivationGoal
SandboxProfile additionalSandboxProfile; SandboxProfile additionalSandboxProfile;
#endif #endif
/* Hash rewriting. */ /**
* Hash rewriting.
*/
StringMap inputRewrites, outputRewrites; StringMap inputRewrites, outputRewrites;
typedef map<StorePath, StorePath> RedirectedOutputs; typedef map<StorePath, StorePath> RedirectedOutputs;
RedirectedOutputs redirectedOutputs; RedirectedOutputs redirectedOutputs;
/* The outputs paths used during the build. /**
* The outputs paths used during the build.
- Input-addressed derivations or fixed content-addressed outputs are *
sometimes built when some of their outputs already exist, and can not * - Input-addressed derivations or fixed content-addressed outputs are
be hidden via sandboxing. We use temporary locations instead and * sometimes built when some of their outputs already exist, and can not
rewrite after the build. Otherwise the regular predetermined paths are * be hidden via sandboxing. We use temporary locations instead and
put here. * rewrite after the build. Otherwise the regular predetermined paths are
* put here.
- Floating content-addressed derivations do not know their final build *
output paths until the outputs are hashed, so random locations are * - Floating content-addressed derivations do not know their final build
used, and then renamed. The randomness helps guard against hidden * output paths until the outputs are hashed, so random locations are
self-references. * used, and then renamed. The randomness helps guard against hidden
* self-references.
*/ */
OutputPathMap scratchOutputs; OutputPathMap scratchOutputs;
/* Path registration info from the previous round, if we're /**
building multiple times. Since this contains the hash, it * Path registration info from the previous round, if we're
allows us to compare whether two rounds produced the same * building multiple times. Since this contains the hash, it
result. */ * allows us to compare whether two rounds produced the same
* result.
*/
std::map<Path, ValidPathInfo> prevInfos; std::map<Path, ValidPathInfo> prevInfos;
uid_t sandboxUid() { return usingUserNamespace ? (!buildUser || buildUser->getUIDCount() == 1 ? 1000 : 0) : buildUser->getUID(); } uid_t sandboxUid() { return usingUserNamespace ? (!buildUser || buildUser->getUIDCount() == 1 ? 1000 : 0) : buildUser->getUID(); }
@ -101,25 +133,37 @@ struct LocalDerivationGoal : public DerivationGoal
const static Path homeDir; const static Path homeDir;
/* The recursive Nix daemon socket. */ /**
* The recursive Nix daemon socket.
*/
AutoCloseFD daemonSocket; AutoCloseFD daemonSocket;
/* The daemon main thread. */ /**
* The daemon main thread.
*/
std::thread daemonThread; std::thread daemonThread;
/* The daemon worker threads. */ /**
* The daemon worker threads.
*/
std::vector<std::thread> daemonWorkerThreads; std::vector<std::thread> daemonWorkerThreads;
/* Paths that were added via recursive Nix calls. */ /**
* Paths that were added via recursive Nix calls.
*/
StorePathSet addedPaths; StorePathSet addedPaths;
/* Realisations that were added via recursive Nix calls. */ /**
* Realisations that were added via recursive Nix calls.
*/
std::set<DrvOutput> addedDrvOutputs; 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 * Recursive Nix calls are only allowed to build or realize paths
(so e.g. you can't do 'nix-store -r /nix/store/<bla>' where * in the original input closure or added via a recursive Nix call
/nix/store/<bla> is some arbitrary path in a binary cache). */ * (so e.g. you can't do 'nix-store -r /nix/store/<bla>' where
* /nix/store/<bla> is some arbitrary path in a binary cache).
*/
bool isAllowed(const StorePath & path) bool isAllowed(const StorePath & path)
{ {
return inputPaths.count(path) || addedPaths.count(path); return inputPaths.count(path) || addedPaths.count(path);
@ -137,55 +181,81 @@ struct LocalDerivationGoal : public DerivationGoal
virtual ~LocalDerivationGoal() override; virtual ~LocalDerivationGoal() override;
/* Whether we need to perform hash rewriting if there are valid output paths. */ /**
* Whether we need to perform hash rewriting if there are valid output paths.
*/
bool needsHashRewrite(); bool needsHashRewrite();
/* The additional states. */ /**
* The additional states.
*/
void tryLocalBuild() override; void tryLocalBuild() override;
/* Start building a derivation. */ /**
* Start building a derivation.
*/
void startBuilder(); void startBuilder();
/* Fill in the environment for the builder. */ /**
* Fill in the environment for the builder.
*/
void initEnv(); void initEnv();
/* Setup tmp dir location. */ /**
* Setup tmp dir location.
*/
void initTmpDir(); void initTmpDir();
/* Write a JSON file containing the derivation attributes. */ /**
* Write a JSON file containing the derivation attributes.
*/
void writeStructuredAttrs(); void writeStructuredAttrs();
void startDaemon(); void startDaemon();
void stopDaemon(); void stopDaemon();
/* Add 'path' to the set of paths that may be referenced by the /**
outputs, and make it appear in the sandbox. */ * Add 'path' to the set of paths that may be referenced by the
* outputs, and make it appear in the sandbox.
*/
void addDependency(const StorePath & path); void addDependency(const StorePath & path);
/* Make a file owned by the builder. */ /**
* Make a file owned by the builder.
*/
void chownToBuilder(const Path & path); void chownToBuilder(const Path & path);
int getChildStatus() override; int getChildStatus() override;
/* Run the builder's process. */ /**
* Run the builder's process.
*/
void runChild(); void runChild();
/* Check that the derivation outputs all exist and register them /**
as valid. */ * Check that the derivation outputs all exist and register them
* as valid.
*/
DrvOutputs registerOutputs() override; DrvOutputs registerOutputs() override;
void signRealisation(Realisation &) override; void signRealisation(Realisation &) override;
/* Check that an output meets the requirements specified by the /**
'outputChecks' attribute (or the legacy * Check that an output meets the requirements specified by the
'{allowed,disallowed}{References,Requisites}' attributes). */ * 'outputChecks' attribute (or the legacy
* '{allowed,disallowed}{References,Requisites}' attributes).
*/
void checkOutputs(const std::map<std::string, ValidPathInfo> & outputs); void checkOutputs(const std::map<std::string, ValidPathInfo> & outputs);
/* Close the read side of the logger pipe. */ /**
* Close the read side of the logger pipe.
*/
void closeReadPipes() override; void closeReadPipes() override;
/* Cleanup hooks for buildDone() */ /**
* Cleanup hooks for buildDone()
*/
void cleanupHookFinally() override; void cleanupHookFinally() override;
void cleanupPreChildKill() override; void cleanupPreChildKill() override;
void cleanupPostChildKill() override; void cleanupPostChildKill() override;
@ -195,24 +265,36 @@ struct LocalDerivationGoal : public DerivationGoal
bool isReadDesc(int fd) override; bool isReadDesc(int fd) override;
/* Delete the temporary directory, if we have one. */ /**
* Delete the temporary directory, if we have one.
*/
void deleteTmpDir(bool force); void deleteTmpDir(bool force);
/* Forcibly kill the child process, if any. */ /**
* Forcibly kill the child process, if any.
*/
void killChild() override; void killChild() override;
/* Kill any processes running under the build user UID or in the /**
cgroup of the build. */ * Kill any processes running under the build user UID or in the
* cgroup of the build.
*/
void killSandbox(bool getStats); void killSandbox(bool getStats);
/* Create alternative path calculated from but distinct from the /**
input, so we can avoid overwriting outputs (or other store paths) * Create alternative path calculated from but distinct from the
that already exist. */ * input, so we can avoid overwriting outputs (or other store paths)
* that already exist.
*/
StorePath makeFallbackPath(const StorePath & path); StorePath makeFallbackPath(const StorePath & path);
/* Make a path to another based on the output name along with the
derivation hash. */ /**
/* FIXME add option to randomize, so we can audit whether our * Make a path to another based on the output name along with the
rewrites caught everything */ * derivation hash.
*
* @todo Add option to randomize, so we can audit whether our
* rewrites caught everything
*/
StorePath makeFallbackPath(std::string_view outputName); StorePath makeFallbackPath(std::string_view outputName);
}; };

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <string> #include <string>

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "lock.hh" #include "lock.hh"
#include "store-api.hh" #include "store-api.hh"
@ -10,38 +11,58 @@ class Worker;
struct PathSubstitutionGoal : public Goal struct PathSubstitutionGoal : public Goal
{ {
/* The store path that should be realised through a substitute. */ /**
* The store path that should be realised through a substitute.
*/
StorePath storePath; StorePath storePath;
/* The path the substituter refers to the path as. This will be /**
different when the stores have different names. */ * The path the substituter refers to the path as. This will be
* different when the stores have different names.
*/
std::optional<StorePath> subPath; std::optional<StorePath> subPath;
/* The remaining substituters. */ /**
* The remaining substituters.
*/
std::list<ref<Store>> subs; std::list<ref<Store>> subs;
/* The current substituter. */ /**
* The current substituter.
*/
std::shared_ptr<Store> sub; std::shared_ptr<Store> sub;
/* Whether a substituter failed. */ /**
* Whether a substituter failed.
*/
bool substituterFailed = false; bool substituterFailed = false;
/* Path info returned by the substituter's query info operation. */ /**
* Path info returned by the substituter's query info operation.
*/
std::shared_ptr<const ValidPathInfo> info; std::shared_ptr<const ValidPathInfo> info;
/* Pipe for the substituter's standard output. */ /**
* Pipe for the substituter's standard output.
*/
Pipe outPipe; Pipe outPipe;
/* The substituter thread. */ /**
* The substituter thread.
*/
std::thread thr; std::thread thr;
std::promise<void> promise; std::promise<void> promise;
/* Whether to try to repair a valid path. */ /**
* Whether to try to repair a valid path.
*/
RepairFlag repair; RepairFlag repair;
/* Location where we're downloading the substitute. Differs from /**
storePath when doing a repair. */ * Location where we're downloading the substitute. Differs from
* storePath when doing a repair.
*/
Path destPath; Path destPath;
std::unique_ptr<MaintainCount<uint64_t>> maintainExpectedSubstitutions, std::unique_ptr<MaintainCount<uint64_t>> maintainExpectedSubstitutions,
@ -50,7 +71,9 @@ struct PathSubstitutionGoal : public Goal
typedef void (PathSubstitutionGoal::*GoalState)(); typedef void (PathSubstitutionGoal::*GoalState)();
GoalState state; GoalState state;
/* Content address for recomputing store path */ /**
* Content address for recomputing store path
*/
std::optional<ContentAddress> ca; std::optional<ContentAddress> ca;
void done( void done(
@ -64,16 +87,20 @@ public:
void timedOut(Error && ex) override { abort(); }; void timedOut(Error && ex) override { abort(); };
/**
* We prepend "a$" to the key name to ensure substitution goals
* happen before derivation goals.
*/
std::string key() override std::string key() override
{ {
/* "a$" ensures substitution goals happen before derivation
goals. */
return "a$" + std::string(storePath.name()) + "$" + worker.store.printStorePath(storePath); return "a$" + std::string(storePath.name()) + "$" + worker.store.printStorePath(storePath);
} }
void work() override; void work() override;
/* The states. */ /**
* The states.
*/
void init(); void init();
void tryNext(); void tryNext();
void gotInfo(); void gotInfo();
@ -81,7 +108,9 @@ public:
void tryToRun(); void tryToRun();
void finished(); void finished();
/* Callback used by the worker to write to the log. */ /**
* Callback used by the worker to write to the log.
*/
void handleChildOutput(int fd, std::string_view data) override; void handleChildOutput(int fd, std::string_view data) override;
void handleEOF(int fd) override; void handleEOF(int fd) override;

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
#include "lock.hh" #include "lock.hh"
@ -16,24 +17,29 @@ struct DerivationGoal;
struct PathSubstitutionGoal; struct PathSubstitutionGoal;
class DrvOutputSubstitutionGoal; class DrvOutputSubstitutionGoal;
/* Workaround for not being able to declare a something like /**
* Workaround for not being able to declare a something like
class PathSubstitutionGoal : public Goal; *
* ```c++
even when Goal is a complete type. * class PathSubstitutionGoal : public Goal;
* ```
This is still a static cast. The purpose of exporting it is to define it in * even when Goal is a complete type.
a place where `PathSubstitutionGoal` is concrete, and use it in a place where it *
is opaque. */ * This is still a static cast. The purpose of exporting it is to define it in
* a place where `PathSubstitutionGoal` is concrete, and use it in a place where it
* is opaque.
*/
GoalPtr upcast_goal(std::shared_ptr<PathSubstitutionGoal> subGoal); GoalPtr upcast_goal(std::shared_ptr<PathSubstitutionGoal> subGoal);
GoalPtr upcast_goal(std::shared_ptr<DrvOutputSubstitutionGoal> subGoal); GoalPtr upcast_goal(std::shared_ptr<DrvOutputSubstitutionGoal> subGoal);
typedef std::chrono::time_point<std::chrono::steady_clock> steady_time_point; typedef std::chrono::time_point<std::chrono::steady_clock> steady_time_point;
/* A mapping used to remember for each child process to what goal it /**
belongs, and file descriptors for receiving log data and output * A mapping used to remember for each child process to what goal it
path creation commands. */ * belongs, and file descriptors for receiving log data and output
* path creation commands.
*/
struct Child struct Child
{ {
WeakGoalPtr goal; WeakGoalPtr goal;
@ -41,14 +47,19 @@ struct Child
std::set<int> fds; std::set<int> fds;
bool respectTimeouts; bool respectTimeouts;
bool inBuildSlot; bool inBuildSlot;
steady_time_point lastOutput; /* time we last got output on stdout/stderr */ /**
* Time we last got output on stdout/stderr
*/
steady_time_point lastOutput;
steady_time_point timeStarted; steady_time_point timeStarted;
}; };
/* Forward definition. */ /* Forward definition. */
struct HookInstance; struct HookInstance;
/* The worker class. */ /**
* The worker class.
*/
class Worker class Worker
{ {
private: private:
@ -56,38 +67,58 @@ private:
/* Note: the worker should only have strong pointers to the /* Note: the worker should only have strong pointers to the
top-level goals. */ top-level goals. */
/* The top-level goals of the worker. */ /**
* The top-level goals of the worker.
*/
Goals topGoals; Goals topGoals;
/* Goals that are ready to do some work. */ /**
* Goals that are ready to do some work.
*/
WeakGoals awake; WeakGoals awake;
/* Goals waiting for a build slot. */ /**
* Goals waiting for a build slot.
*/
WeakGoals wantingToBuild; WeakGoals wantingToBuild;
/* Child processes currently running. */ /**
* Child processes currently running.
*/
std::list<Child> children; std::list<Child> children;
/* Number of build slots occupied. This includes local builds and /**
substitutions but not remote builds via the build hook. */ * Number of build slots occupied. This includes local builds and
* substitutions but not remote builds via the build hook.
*/
unsigned int nrLocalBuilds; unsigned int nrLocalBuilds;
/* Maps used to prevent multiple instantiations of a goal for the /**
same derivation / path. */ * 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<DerivationGoal>> derivationGoals;
std::map<StorePath, std::weak_ptr<PathSubstitutionGoal>> substitutionGoals; std::map<StorePath, std::weak_ptr<PathSubstitutionGoal>> substitutionGoals;
std::map<DrvOutput, std::weak_ptr<DrvOutputSubstitutionGoal>> drvOutputSubstitutionGoals; std::map<DrvOutput, std::weak_ptr<DrvOutputSubstitutionGoal>> drvOutputSubstitutionGoals;
/* Goals waiting for busy paths to be unlocked. */ /**
* Goals waiting for busy paths to be unlocked.
*/
WeakGoals waitingForAnyGoal; WeakGoals waitingForAnyGoal;
/* Goals sleeping for a few seconds (polling a lock). */ /**
* Goals sleeping for a few seconds (polling a lock).
*/
WeakGoals waitingForAWhile; WeakGoals waitingForAWhile;
/* Last time the goals in `waitingForAWhile' where woken up. */ /**
* Last time the goals in `waitingForAWhile` where woken up.
*/
steady_time_point lastWokenUp; steady_time_point lastWokenUp;
/* Cache for pathContentsGood(). */ /**
* Cache for pathContentsGood().
*/
std::map<StorePath, bool> pathContentsGoodCache; std::map<StorePath, bool> pathContentsGoodCache;
public: public:
@ -96,17 +127,25 @@ public:
const Activity actDerivations; const Activity actDerivations;
const Activity actSubstitutions; const Activity actSubstitutions;
/* Set if at least one derivation had a BuildError (i.e. permanent /**
failure). */ * Set if at least one derivation had a BuildError (i.e. permanent
* failure).
*/
bool permanentFailure; bool permanentFailure;
/* Set if at least one derivation had a timeout. */ /**
* Set if at least one derivation had a timeout.
*/
bool timedOut; bool timedOut;
/* Set if at least one derivation fails with a hash mismatch. */ /**
* Set if at least one derivation fails with a hash mismatch.
*/
bool hashMismatch; bool hashMismatch;
/* Set if at least one derivation is not deterministic in check mode. */ /**
* Set if at least one derivation is not deterministic in check mode.
*/
bool checkMismatch; bool checkMismatch;
Store & store; Store & store;
@ -128,16 +167,22 @@ public:
uint64_t expectedNarSize = 0; uint64_t expectedNarSize = 0;
uint64_t doneNarSize = 0; uint64_t doneNarSize = 0;
/* Whether to ask the build hook if it can build a derivation. If /**
it answers with "decline-permanently", we don't try again. */ * Whether to ask the build hook if it can build a derivation. If
* it answers with "decline-permanently", we don't try again.
*/
bool tryBuildHook = true; bool tryBuildHook = true;
Worker(Store & store, Store & evalStore); Worker(Store & store, Store & evalStore);
~Worker(); ~Worker();
/* Make a goal (with caching). */ /**
* Make a goal (with caching).
*/
/* derivation goal */ /**
* derivation goal
*/
private: private:
std::shared_ptr<DerivationGoal> makeDerivationGoalCommon( std::shared_ptr<DerivationGoal> makeDerivationGoalCommon(
const StorePath & drvPath, const OutputsSpec & wantedOutputs, const StorePath & drvPath, const OutputsSpec & wantedOutputs,
@ -150,56 +195,80 @@ public:
const StorePath & drvPath, const BasicDerivation & drv, const StorePath & drvPath, const BasicDerivation & drv,
const OutputsSpec & wantedOutputs, BuildMode buildMode = bmNormal); const OutputsSpec & wantedOutputs, BuildMode buildMode = bmNormal);
/* substitution goal */ /**
* substitution goal
*/
std::shared_ptr<PathSubstitutionGoal> makePathSubstitutionGoal(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); std::shared_ptr<DrvOutputSubstitutionGoal> makeDrvOutputSubstitutionGoal(const DrvOutput & id, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
/* Remove a dead goal. */ /**
* Remove a dead goal.
*/
void removeGoal(GoalPtr goal); void removeGoal(GoalPtr goal);
/* Wake up a goal (i.e., there is something for it to do). */ /**
* Wake up a goal (i.e., there is something for it to do).
*/
void wakeUp(GoalPtr goal); void wakeUp(GoalPtr goal);
/* Return the number of local build and substitution processes /**
currently running (but not remote builds via the build * Return the number of local build and substitution processes
hook). */ * currently running (but not remote builds via the build
* hook).
*/
unsigned int getNrLocalBuilds(); unsigned int getNrLocalBuilds();
/* Registers a running child process. `inBuildSlot' means that /**
the process counts towards the jobs limit. */ * Registers a running child process. `inBuildSlot` means that
* the process counts towards the jobs limit.
*/
void childStarted(GoalPtr goal, const std::set<int> & fds, void childStarted(GoalPtr goal, const std::set<int> & fds,
bool inBuildSlot, bool respectTimeouts); bool inBuildSlot, bool respectTimeouts);
/* Unregisters a running child process. `wakeSleepers' should be /**
false if there is no sense in waking up goals that are sleeping * Unregisters a running child process. `wakeSleepers` should be
because they can't run yet (e.g., there is no free build slot, * false if there is no sense in waking up goals that are sleeping
or the hook would still say `postpone'). */ * because they can't run yet (e.g., there is no free build slot,
* or the hook would still say `postpone`).
*/
void childTerminated(Goal * goal, bool wakeSleepers = true); void childTerminated(Goal * goal, bool wakeSleepers = true);
/* Put `goal' to sleep until a build slot becomes available (which /**
might be right away). */ * Put `goal` to sleep until a build slot becomes available (which
* might be right away).
*/
void waitForBuildSlot(GoalPtr goal); void waitForBuildSlot(GoalPtr goal);
/* Wait for any goal to finish. Pretty indiscriminate way to /**
wait for some resource that some other goal is holding. */ * Wait for any goal to finish. Pretty indiscriminate way to
* wait for some resource that some other goal is holding.
*/
void waitForAnyGoal(GoalPtr goal); void waitForAnyGoal(GoalPtr goal);
/* Wait for a few seconds and then retry this goal. Used when /**
waiting for a lock held by another process. This kind of * Wait for a few seconds and then retry this goal. Used when
polling is inefficient, but POSIX doesn't really provide a way * waiting for a lock held by another process. This kind of
to wait for multiple locks in the main select() loop. */ * polling is inefficient, but POSIX doesn't really provide a way
* to wait for multiple locks in the main select() loop.
*/
void waitForAWhile(GoalPtr goal); void waitForAWhile(GoalPtr goal);
/* Loop until the specified top-level goals have finished. */ /**
* Loop until the specified top-level goals have finished.
*/
void run(const Goals & topGoals); void run(const Goals & topGoals);
/* Wait for input to become available. */ /**
* Wait for input to become available.
*/
void waitForInput(); void waitForInput();
unsigned int exitStatus(); unsigned int exitStatus();
/* Check whether the given valid path exists and has the right /**
contents. */ * Check whether the given valid path exists and has the right
* contents.
*/
bool pathContentsGood(const StorePath & path); bool pathContentsGood(const StorePath & path);
void markContentsGood(const StorePath & path); void markContentsGood(const StorePath & path);

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "derivations.hh" #include "derivations.hh"

View file

@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "derivations.hh" #include "derivations.hh"
#include "store-api.hh" #include "store-api.hh"

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@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include <variant> #include <variant>
#include "hash.hh" #include "hash.hh"

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@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "types.hh" #include "types.hh"
@ -11,8 +12,10 @@ struct Key
std::string name; std::string name;
std::string key; std::string key;
/* Construct Key from a string in the format /**
<name>:<key-in-base64>. */ * Construct Key from a string in the format
* <name>:<key-in-base64>.
*/
Key(std::string_view s); Key(std::string_view s);
std::string to_string() const; std::string to_string() const;
@ -28,7 +31,9 @@ struct SecretKey : Key
{ {
SecretKey(std::string_view s); SecretKey(std::string_view s);
/* Return a detached signature of the given string. */ /**
* Return a detached signature of the given string.
*/
std::string signDetached(std::string_view s) const; std::string signDetached(std::string_view s) const;
PublicKey toPublicKey() const; PublicKey toPublicKey() const;
@ -52,8 +57,10 @@ private:
typedef std::map<std::string, PublicKey> PublicKeys; typedef std::map<std::string, PublicKey> PublicKeys;
/* Return true iff sig is a correct signature over data using one /**
of the given public keys. */ * @return true iff sig is a correct signature over data using one
* of the given public keys.
*/
bool verifyDetached(const std::string & data, const std::string & sig, bool verifyDetached(const std::string & data, const std::string & sig,
const PublicKeys & publicKeys); const PublicKeys & publicKeys);

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@ -1036,6 +1036,15 @@ void processConnection(
if (GET_PROTOCOL_MINOR(clientVersion) >= 33) if (GET_PROTOCOL_MINOR(clientVersion) >= 33)
to << nixVersion; to << nixVersion;
if (GET_PROTOCOL_MINOR(clientVersion) >= 35) {
// We and the underlying store both need to trust the client for
// it to be trusted.
auto temp = trusted
? store->isTrustedClient()
: std::optional { NotTrusted };
worker_proto::write(*store, to, temp);
}
/* Send startup error messages to the client. */ /* Send startup error messages to the client. */
tunnelLogger->startWork(); tunnelLogger->startWork();

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@ -1,11 +1,11 @@
#pragma once #pragma once
///@file
#include "serialise.hh" #include "serialise.hh"
#include "store-api.hh" #include "store-api.hh"
namespace nix::daemon { namespace nix::daemon {
enum TrustedFlag : bool { NotTrusted = false, Trusted = true };
enum RecursiveFlag : bool { NotRecursive = false, Recursive = true }; enum RecursiveFlag : bool { NotRecursive = false, Recursive = true };
void processConnection( void processConnection(

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@ -312,6 +312,15 @@ Derivation parseDerivation(const Store & store, std::string && s, std::string_vi
} }
/**
* Print a derivation string literal to an `std::string`.
*
* This syntax does not generalize to the expression language, which needs to
* escape `$`.
*
* @param res Where to print to
* @param s Which logical string to print
*/
static void printString(std::string & res, std::string_view s) static void printString(std::string & res, std::string_view s)
{ {
boost::container::small_vector<char, 64 * 1024> buffer; boost::container::small_vector<char, 64 * 1024> buffer;
@ -888,6 +897,67 @@ std::optional<BasicDerivation> Derivation::tryResolve(
return resolved; return resolved;
} }
void Derivation::checkInvariants(Store & store, const StorePath & drvPath) const
{
assert(drvPath.isDerivation());
std::string drvName(drvPath.name());
drvName = drvName.substr(0, drvName.size() - drvExtension.size());
if (drvName != name) {
throw Error("Derivation '%s' has name '%s' which does not match its path", store.printStorePath(drvPath), name);
}
auto envHasRightPath = [&](const StorePath & actual, const std::string & varName)
{
auto j = env.find(varName);
if (j == env.end() || store.parseStorePath(j->second) != actual)
throw Error("derivation '%s' has incorrect environment variable '%s', should be '%s'",
store.printStorePath(drvPath), varName, store.printStorePath(actual));
};
// Don't need the answer, but do this anyways to assert is proper
// combination. The code below is more general and naturally allows
// combinations that are currently prohibited.
type();
std::optional<DrvHash> hashesModulo;
for (auto & i : outputs) {
std::visit(overloaded {
[&](const DerivationOutput::InputAddressed & doia) {
if (!hashesModulo) {
// somewhat expensive so we do lazily
hashesModulo = hashDerivationModulo(store, *this, true);
}
auto currentOutputHash = get(hashesModulo->hashes, i.first);
if (!currentOutputHash)
throw Error("derivation '%s' has unexpected output '%s' (local-store / hashesModulo) named '%s'",
store.printStorePath(drvPath), store.printStorePath(doia.path), i.first);
StorePath recomputed = store.makeOutputPath(i.first, *currentOutputHash, drvName);
if (doia.path != recomputed)
throw Error("derivation '%s' has incorrect output '%s', should be '%s'",
store.printStorePath(drvPath), store.printStorePath(doia.path), store.printStorePath(recomputed));
envHasRightPath(doia.path, i.first);
},
[&](const DerivationOutput::CAFixed & dof) {
auto path = dof.path(store, drvName, i.first);
envHasRightPath(path, i.first);
},
[&](const DerivationOutput::CAFloating &) {
/* Nothing to check */
},
[&](const DerivationOutput::Deferred &) {
/* Nothing to check */
},
[&](const DerivationOutput::Impure &) {
/* Nothing to check */
},
}, i.second.raw());
}
}
const Hash impureOutputHash = hashString(htSHA256, "impure"); const Hash impureOutputHash = hashString(htSHA256, "impure");
nlohmann::json DerivationOutput::toJSON( nlohmann::json DerivationOutput::toJSON(
@ -916,10 +986,79 @@ nlohmann::json DerivationOutput::toJSON(
return res; return res;
} }
DerivationOutput DerivationOutput::fromJSON(
const Store & store, std::string_view drvName, std::string_view outputName,
const nlohmann::json & _json)
{
std::set<std::string_view> keys;
auto json = (std::map<std::string, nlohmann::json>) _json;
for (const auto & [key, _] : json)
keys.insert(key);
auto methodAlgo = [&]() -> std::pair<FileIngestionMethod, HashType> {
std::string hashAlgo = json["hashAlgo"];
auto method = FileIngestionMethod::Flat;
if (hashAlgo.substr(0, 2) == "r:") {
method = FileIngestionMethod::Recursive;
hashAlgo = hashAlgo.substr(2);
}
auto hashType = parseHashType(hashAlgo);
return { method, hashType };
};
if (keys == (std::set<std::string_view> { "path" })) {
return DerivationOutput::InputAddressed {
.path = store.parseStorePath((std::string) json["path"]),
};
}
else if (keys == (std::set<std::string_view> { "path", "hashAlgo", "hash" })) {
auto [method, hashType] = methodAlgo();
auto dof = DerivationOutput::CAFixed {
.ca = ContentAddressWithReferences::fromParts(
method,
Hash::parseNonSRIUnprefixed((std::string) json["hash"], hashType),
{}),
};
if (dof.path(store, drvName, outputName) != store.parseStorePath((std::string) json["path"]))
throw Error("Path doesn't match derivation output");
return dof;
}
else if (keys == (std::set<std::string_view> { "hashAlgo" })) {
auto [method, hashType] = methodAlgo();
return DerivationOutput::CAFloating {
.method = method,
.hashType = hashType,
};
}
else if (keys == (std::set<std::string_view> { })) {
return DerivationOutput::Deferred {};
}
else if (keys == (std::set<std::string_view> { "hashAlgo", "impure" })) {
auto [method, hashType] = methodAlgo();
return DerivationOutput::Impure {
.method = method,
.hashType = hashType,
};
}
else {
throw Error("invalid JSON for derivation output");
}
}
nlohmann::json Derivation::toJSON(const Store & store) const nlohmann::json Derivation::toJSON(const Store & store) const
{ {
nlohmann::json res = nlohmann::json::object(); nlohmann::json res = nlohmann::json::object();
res["name"] = name;
{ {
nlohmann::json & outputsObj = res["outputs"]; nlohmann::json & outputsObj = res["outputs"];
outputsObj = nlohmann::json::object(); outputsObj = nlohmann::json::object();
@ -950,4 +1089,43 @@ nlohmann::json Derivation::toJSON(const Store & store) const
return res; return res;
} }
Derivation Derivation::fromJSON(
const Store & store,
const nlohmann::json & json)
{
Derivation res;
res.name = json["name"];
{
auto & outputsObj = json["outputs"];
for (auto & [outputName, output] : outputsObj.items()) {
res.outputs.insert_or_assign(
outputName,
DerivationOutput::fromJSON(store, res.name, outputName, output));
}
}
{
auto & inputsList = json["inputSrcs"];
for (auto & input : inputsList)
res.inputSrcs.insert(store.parseStorePath(static_cast<const std::string &>(input)));
}
{
auto & inputDrvsObj = json["inputDrvs"];
for (auto & [inputDrvPath, inputOutputs] : inputDrvsObj.items())
res.inputDrvs[store.parseStorePath(inputDrvPath)] =
static_cast<const StringSet &>(inputOutputs);
}
res.platform = json["system"];
res.builder = json["builder"];
res.args = json["args"];
res.env = json["env"];
return res;
}
} }

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@ -1,4 +1,5 @@
#pragma once #pragma once
///@file
#include "path.hh" #include "path.hh"
#include "types.hh" #include "types.hh"
@ -6,6 +7,7 @@
#include "content-address.hh" #include "content-address.hh"
#include "repair-flag.hh" #include "repair-flag.hh"
#include "sync.hh" #include "sync.hh"
#include "comparator.hh"
#include <map> #include <map>
#include <variant> #include <variant>
@ -23,6 +25,8 @@ class Store;
struct DerivationOutputInputAddressed struct DerivationOutputInputAddressed
{ {
StorePath path; StorePath path;
GENERATE_CMP(DerivationOutputInputAddressed, me->path);
}; };
/** /**
@ -43,6 +47,8 @@ struct DerivationOutputCAFixed
* @param outputName The name of this output. * @param outputName The name of this output.
*/ */
StorePath path(const Store & store, std::string_view drvName, std::string_view outputName) const; StorePath path(const Store & store, std::string_view drvName, std::string_view outputName) const;
GENERATE_CMP(DerivationOutputCAFixed, me->ca);
}; };
/** /**
@ -61,13 +67,17 @@ struct DerivationOutputCAFloating
* How the serialization will be hashed * How the serialization will be hashed
*/ */
HashType hashType; HashType hashType;
GENERATE_CMP(DerivationOutputCAFloating, me->method, me->hashType);
}; };
/** /**
* Input-addressed output which depends on a (CA) derivation whose hash * Input-addressed output which depends on a (CA) derivation whose hash
* isn't known yet. * isn't known yet.
*/ */
struct DerivationOutputDeferred {}; struct DerivationOutputDeferred {
GENERATE_CMP(DerivationOutputDeferred);
};
/** /**
* Impure output which is moved to a content-addressed location (like * Impure output which is moved to a content-addressed location (like
@ -84,6 +94,8 @@ struct DerivationOutputImpure
* How the serialization will be hashed * How the serialization will be hashed
*/ */
HashType hashType; HashType hashType;
GENERATE_CMP(DerivationOutputImpure, me->method, me->hashType);
}; };
typedef std::variant< typedef std::variant<
@ -124,6 +136,11 @@ struct DerivationOutput : _DerivationOutputRaw
const Store & store, const Store & store,
std::string_view drvName, std::string_view drvName,
std::string_view outputName) const; std::string_view outputName) const;
static DerivationOutput fromJSON(
const Store & store,
std::string_view drvName,
std::string_view outputName,
const nlohmann::json & json);
}; };
typedef std::map<std::string, DerivationOutput> DerivationOutputs; typedef std::map<std::string, DerivationOutput> DerivationOutputs;
@ -241,8 +258,14 @@ struct DerivationType : _DerivationTypeRaw {
struct BasicDerivation struct BasicDerivation
{ {
DerivationOutputs outputs; /* keyed on symbolic IDs */ /**
StorePathSet inputSrcs; /* inputs that are sources */ * keyed on symbolic IDs
*/
DerivationOutputs outputs;
/**
* inputs that are sources
*/
StorePathSet inputSrcs;
std::string platform; std::string platform;
Path builder; Path builder;
Strings args; Strings args;
@ -272,6 +295,15 @@ struct BasicDerivation
DerivationOutputsAndOptPaths outputsAndOptPaths(const Store & store) const; DerivationOutputsAndOptPaths outputsAndOptPaths(const Store & store) const;
static std::string_view nameFromPath(const StorePath & storePath); static std::string_view nameFromPath(const StorePath & storePath);
GENERATE_CMP(BasicDerivation,
me->outputs,
me->inputSrcs,
me->platform,
me->builder,
me->args,
me->env,
me->name);
}; };
struct Derivation : BasicDerivation struct Derivation : BasicDerivation
@ -307,11 +339,26 @@ struct Derivation : BasicDerivation
Store & store, Store & store,
const std::map<std::pair<StorePath, std::string>, StorePath> & inputDrvOutputs) const; const std::map<std::pair<StorePath, std::string>, StorePath> & inputDrvOutputs) const;
/* Check that the derivation is valid and does not present any
illegal states.
This is mainly a matter of checking the outputs, where our C++
representation supports all sorts of combinations we do not yet
allow. */
void checkInvariants(Store & store, const StorePath & drvPath) const;
Derivation() = default; Derivation() = default;
Derivation(const BasicDerivation & bd) : BasicDerivation(bd) { } Derivation(const BasicDerivation & bd) : BasicDerivation(bd) { }
Derivation(BasicDerivation && bd) : BasicDerivation(std::move(bd)) { } Derivation(BasicDerivation && bd) : BasicDerivation(std::move(bd)) { }
nlohmann::json toJSON(const Store & store) const; nlohmann::json toJSON(const Store & store) const;
static Derivation fromJSON(
const Store & store,
const nlohmann::json & json);
GENERATE_CMP(Derivation,
static_cast<const BasicDerivation &>(*me),
me->inputDrvs);
}; };
@ -388,12 +435,12 @@ void operator |= (DrvHash::Kind & self, const DrvHash::Kind & other) noexcept;
* *
* A fixed-output derivation is a derivation whose outputs have a * A fixed-output derivation is a derivation whose outputs have a
* specified content hash and hash algorithm. (Currently they must have * specified content hash and hash algorithm. (Currently they must have
* exactly one output (`out'), which is specified using the `outputHash' * exactly one output (`out`), which is specified using the `outputHash`
* and `outputHashAlgo' attributes, but the algorithm doesn't assume * and `outputHashAlgo` attributes, but the algorithm doesn't assume
* this.) We don't want changes to such derivations to propagate upwards * this.) We don't want changes to such derivations to propagate upwards
* through the dependency graph, changing output paths everywhere. * through the dependency graph, changing output paths everywhere.
* *
* For instance, if we change the url in a call to the `fetchurl' * For instance, if we change the url in a call to the `fetchurl`
* function, we do not want to rebuild everything depending on it---after * function, we do not want to rebuild everything depending on it---after
* all, (the hash of) the file being downloaded is unchanged. So the * all, (the hash of) the file being downloaded is unchanged. So the
* *output paths* should not change. On the other hand, the *derivation * *output paths* should not change. On the other hand, the *derivation

View file

@ -62,15 +62,31 @@ std::string DerivedPath::Opaque::to_string(const Store & store) const
std::string DerivedPath::Built::to_string(const Store & store) const std::string DerivedPath::Built::to_string(const Store & store) const
{ {
return store.printStorePath(drvPath) return store.printStorePath(drvPath)
+ "!" + '^'
+ outputs.to_string();
}
std::string DerivedPath::Built::to_string_legacy(const Store & store) const
{
return store.printStorePath(drvPath)
+ '!'
+ outputs.to_string(); + outputs.to_string();
} }
std::string DerivedPath::to_string(const Store & store) const std::string DerivedPath::to_string(const Store & store) const
{ {
return std::visit( return std::visit(overloaded {
[&](const auto & req) { return req.to_string(store); }, [&](const DerivedPath::Built & req) { return req.to_string(store); },
this->raw()); [&](const DerivedPath::Opaque & req) { return req.to_string(store); },
}, this->raw());
}
std::string DerivedPath::to_string_legacy(const Store & store) const
{
return std::visit(overloaded {
[&](const DerivedPath::Built & req) { return req.to_string_legacy(store); },
[&](const DerivedPath::Opaque & req) { return req.to_string(store); },
}, this->raw());
} }
@ -87,14 +103,24 @@ DerivedPath::Built DerivedPath::Built::parse(const Store & store, std::string_vi
}; };
} }
DerivedPath DerivedPath::parse(const Store & store, std::string_view s) static inline DerivedPath parseWith(const Store & store, std::string_view s, std::string_view separator)
{ {
size_t n = s.find("!"); size_t n = s.find(separator);
return n == s.npos return n == s.npos
? (DerivedPath) DerivedPath::Opaque::parse(store, s) ? (DerivedPath) DerivedPath::Opaque::parse(store, s)
: (DerivedPath) DerivedPath::Built::parse(store, s.substr(0, n), s.substr(n + 1)); : (DerivedPath) DerivedPath::Built::parse(store, s.substr(0, n), s.substr(n + 1));
} }
DerivedPath DerivedPath::parse(const Store & store, std::string_view s)
{
return parseWith(store, s, "^");
}
DerivedPath DerivedPath::parseLegacy(const Store & store, std::string_view s)
{
return parseWith(store, s, "!");
}
RealisedPath::Set BuiltPath::toRealisedPaths(Store & store) const RealisedPath::Set BuiltPath::toRealisedPaths(Store & store) const
{ {
RealisedPath::Set res; RealisedPath::Set res;

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