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Merge branch 'master' into referenceablePaths

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Théophane Hufschmitt 2023-01-30 10:31:00 +01:00 committed by GitHub
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28
.github/PULL_REQUEST_TEMPLATE.md vendored Normal file
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@ -0,0 +1,28 @@
# Motivation
<!-- Briefly explain what the change is about and why it is desirable. -->
# Context
<!-- Provide context. Reference open issues if available. -->
<!-- Non-trivial change: Briefly outline the implementation strategy. -->
<!-- Invasive change: Discuss alternative designs or approaches you considered. -->
<!-- Large change: Provide instructions to reviewers how to read the diff. -->
# Checklist for maintainers
<!-- Contributors: please leave this as is -->
Maintainers: tick if completed or explain if not relevant
- [ ] agreed on idea
- [ ] agreed on implementation strategy
- [ ] tests, as appropriate
- functional tests - `tests/**.sh`
- unit tests - `src/*/tests`
- integration tests - `tests/nixos/*`
- [ ] documentation in the manual
- [ ] code and comments are self-explanatory
- [ ] commit message explains why the change was made
- [ ] new feature or bug fix: updated release notes

2
.github/workflows/backport.yml vendored
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@ -21,7 +21,7 @@ jobs:
fetch-depth: 0
- name: Create backport PRs
# should be kept in sync with `version`
uses: zeebe-io/backport-action@v1.0.1
uses: zeebe-io/backport-action@v1.1.0
with:
# Config README: https://github.com/zeebe-io/backport-action#backport-action
github_token: ${{ secrets.GITHUB_TOKEN }}

2
.version
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@ -1 +1 @@
2.13.0
2.14.0

77
boehmgc-coroutine-sp-fallback.diff Normal file
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@ -0,0 +1,77 @@
diff --git a/darwin_stop_world.c b/darwin_stop_world.c
index 3dbaa3fb..36a1d1f7 100644
--- a/darwin_stop_world.c
+++ b/darwin_stop_world.c
@@ -352,6 +352,7 @@ GC_INNER void GC_push_all_stacks(void)
int nthreads = 0;
word total_size = 0;
mach_msg_type_number_t listcount = (mach_msg_type_number_t)THREAD_TABLE_SZ;
+ size_t stack_limit;
if (!EXPECT(GC_thr_initialized, TRUE))
GC_thr_init();
@@ -407,6 +408,19 @@ GC_INNER void GC_push_all_stacks(void)
GC_push_all_stack_sections(lo, hi, p->traced_stack_sect);
}
if (altstack_lo) {
+ // When a thread goes into a coroutine, we lose its original sp until
+ // control flow returns to the thread.
+ // While in the coroutine, the sp points outside the thread stack,
+ // so we can detect this and push the entire thread stack instead,
+ // as an approximation.
+ // We assume that the coroutine has similarly added its entire stack.
+ // This could be made accurate by cooperating with the application
+ // via new functions and/or callbacks.
+ stack_limit = pthread_get_stacksize_np(p->id);
+ if (altstack_lo >= altstack_hi || altstack_lo < altstack_hi - stack_limit) { // sp outside stack
+ altstack_lo = altstack_hi - stack_limit;
+ }
+
total_size += altstack_hi - altstack_lo;
GC_push_all_stack(altstack_lo, altstack_hi);
}
diff --git a/pthread_stop_world.c b/pthread_stop_world.c
index b5d71e62..aed7b0bf 100644
--- a/pthread_stop_world.c
+++ b/pthread_stop_world.c
@@ -768,6 +768,8 @@ STATIC void GC_restart_handler(int sig)
/* world is stopped. Should not fail if it isn't. */
GC_INNER void GC_push_all_stacks(void)
{
+ size_t stack_limit;
+ pthread_attr_t pattr;
GC_bool found_me = FALSE;
size_t nthreads = 0;
int i;
@@ -851,6 +853,31 @@ GC_INNER void GC_push_all_stacks(void)
hi = p->altstack + p->altstack_size;
/* FIXME: Need to scan the normal stack too, but how ? */
/* FIXME: Assume stack grows down */
+ } else {
+ if (pthread_getattr_np(p->id, &pattr)) {
+ ABORT("GC_push_all_stacks: pthread_getattr_np failed!");
+ }
+ if (pthread_attr_getstacksize(&pattr, &stack_limit)) {
+ ABORT("GC_push_all_stacks: pthread_attr_getstacksize failed!");
+ }
+ if (pthread_attr_destroy(&pattr)) {
+ ABORT("GC_push_all_stacks: pthread_attr_destroy failed!");
+ }
+ // When a thread goes into a coroutine, we lose its original sp until
+ // control flow returns to the thread.
+ // While in the coroutine, the sp points outside the thread stack,
+ // so we can detect this and push the entire thread stack instead,
+ // as an approximation.
+ // We assume that the coroutine has similarly added its entire stack.
+ // This could be made accurate by cooperating with the application
+ // via new functions and/or callbacks.
+ #ifndef STACK_GROWS_UP
+ if (lo >= hi || lo < hi - stack_limit) { // sp outside stack
+ lo = hi - stack_limit;
+ }
+ #else
+ #error "STACK_GROWS_UP not supported in boost_coroutine2 (as of june 2021), so we don't support it in Nix."
+ #endif
}
GC_push_all_stack_sections(lo, hi, traced_stack_sect);
# ifdef STACK_GROWS_UP

6
configure.ac
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@ -274,6 +274,12 @@ fi
PKG_CHECK_MODULES([GTEST], [gtest_main])
# Look for rapidcheck.
# No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302
AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>])
AC_CHECK_LIB([rapidcheck], [])
# Look for nlohmann/json.
PKG_CHECK_MODULES([NLOHMANN_JSON], [nlohmann_json >= 3.9])

9
doc/manual/book.toml
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@ -10,3 +10,12 @@ git-repository-url = "https://github.com/NixOS/nix"
[preprocessor.anchors]
renderers = ["html"]
command = "jq --from-file doc/manual/anchors.jq"
[output.linkcheck]
# no Internet during the build (in the sandbox)
follow-web-links = false
# mdbook-linkcheck does not understand [foo]{#bar} style links, resulting in
# excessive "Potential incomplete link" warnings. No other kind of warning was
# produced at the time of writing.
warning-policy = "ignore"

21
doc/manual/local.mk
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@ -50,11 +50,16 @@ $(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/command-ref/new-cli
$(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/generate-manpage.nix $(bindir)/nix
@rm -rf $@
$(trace-gen) $(nix-eval) --write-to $@ --expr 'import doc/manual/generate-manpage.nix { toplevel = builtins.readFile $<; }'
$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix { toplevel = builtins.readFile $<; }'
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) sed -i $@.tmp/*.md -e 's^@docroot@^../..^g'
@mv $@.tmp $@
$(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/generate-options.nix $(d)/src/command-ref/conf-file-prefix.md $(bindir)/nix
@cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-options.nix (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-options.nix (builtins.fromJSON (builtins.readFile $<))' \
| sed -e 's^@docroot@^..^g'>> $@.tmp
@mv $@.tmp $@
$(d)/nix.json: $(bindir)/nix
@ -67,7 +72,9 @@ $(d)/conf-file.json: $(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
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp
# @docroot@: https://nixos.org/manual/nix/unstable/contributing/hacking.html#docroot-variable
$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<))' \
| sed -e 's^@docroot@^..^g' >> $@.tmp
@cat doc/manual/src/language/builtins-suffix.md >> $@.tmp
@mv $@.tmp $@
@ -102,6 +109,12 @@ doc/manual/generated/man1/nix3-manpages: $(d)/src/command-ref/new-cli
@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
$(trace-gen) RUST_LOG=warn mdbook build doc/manual -d $(DESTDIR)$(docdir)/manual
$(trace-gen) \
set -euo pipefail; \
RUST_LOG=warn mdbook build doc/manual -d $(DESTDIR)$(docdir)/manual.tmp 2>&1 \
| { grep -Fv "because fragment resolution isn't implemented" || :; }
@rm -rf $(DESTDIR)$(docdir)/manual
@mv $(DESTDIR)$(docdir)/manual.tmp/html $(DESTDIR)$(docdir)/manual
@rm -rf $(DESTDIR)$(docdir)/manual.tmp
endif

1
doc/manual/src/SUMMARY.md.in
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@ -67,6 +67,7 @@
- [CLI guideline](contributing/cli-guideline.md)
- [Release Notes](release-notes/release-notes.md)
- [Release X.Y (202?-??-??)](release-notes/rl-next.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 2.11 (2022-08-25)](release-notes/rl-2.11.md)
- [Release 2.10 (2022-07-11)](release-notes/rl-2.10.md)

2
doc/manual/src/architecture/architecture.md
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@ -68,7 +68,7 @@ It can also execute build plans to produce new data, which are made available to
A build plan itself is a series of *build tasks*, together with their build inputs.
> **Important**
> A build task in Nix is called [derivation](../glossary#gloss-derivation).
> A build task in Nix is called [derivation](../glossary.md#gloss-derivation).
Each build task has a special build input executed as *build instructions* in order to perform the build.
The result of a build task can be input to another build task.

2
doc/manual/src/command-ref/env-common.md
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@ -11,7 +11,7 @@ Most Nix commands interpret the following environment variables:
expressions using [paths](../language/values.md#type-path)
enclosed in angle brackets (i.e., `<path>`),
e.g. `/home/eelco/Dev:/etc/nixos`. It can be extended using the
[`-I` option](./opt-common#opt-I).
[`-I` option](./opt-common.md#opt-I).
- [`NIX_IGNORE_SYMLINK_STORE`]{#env-NIX_IGNORE_SYMLINK_STORE}\
Normally, the Nix store directory (typically `/nix/store`) is not

2
doc/manual/src/command-ref/nix-copy-closure.md
View file

@ -49,7 +49,7 @@ authentication, you can avoid typing the passphrase with `ssh-agent`.
- `--include-outputs`\
Also copy the outputs of [store derivation]s included in the closure.
[store derivation]: ../../glossary.md#gloss-store-derivation
[store derivation]: ../glossary.md#gloss-store-derivation
- `--use-substitutes` / `-s`\
Attempt to download missing paths on the target machine using Nix’s

29
doc/manual/src/command-ref/nix-store.md
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@ -66,11 +66,11 @@ The operation `--realise` essentially “builds” the specified store
paths. Realisation is a somewhat overloaded term:
- If the store path is a *derivation*, realisation ensures that the
output paths of the derivation are [valid](../glossary.md) (i.e.,
output paths of the derivation are [valid] (i.e.,
the output path and its closure exist in the file system). This
can be done in several ways. First, it is possible that the
outputs are already valid, in which case we are done
immediately. Otherwise, there may be [substitutes](../glossary.md)
immediately. Otherwise, there may be [substitutes]
that produce the outputs (e.g., by downloading them). Finally, the
outputs can be produced by running the build task described
by the derivation.
@ -82,6 +82,9 @@ paths. Realisation is a somewhat overloaded term:
produced through substitutes. If there are no (successful)
substitutes, realisation fails.
[valid]: ../glossary.md#gloss-validity
[substitutes]: ../glossary.md#gloss-substitute
The output path of each derivation is printed on standard output. (For
non-derivations argument, the argument itself is printed.)
@ -155,6 +158,12 @@ To test whether a previously-built derivation is deterministic:
$ nix-build '<nixpkgs>' -A hello --check -K
```
Use [`--read-log`](#operation---read-log) to show the stderr and stdout of a build:
```console
$ nix-store --read-log $(nix-instantiate ./test.nix)
```
# Operation `--serve`
## Synopsis
@ -289,8 +298,8 @@ error: cannot delete path `/nix/store/zq0h41l75vlb4z45kzgjjmsjxvcv1qk7-mesa-6.4'
## Description
The operation `--query` displays various bits of information about the
store paths . The queries are described below. At most one query can be
The operation `--query` displays information about [store path]s.
The queries are described below. At most one query can be
specified. The default query is `--outputs`.
The paths *paths* may also be symlinks from outside of the Nix store, to
@ -310,12 +319,12 @@ symlink.
## Queries
- `--outputs`\
Prints out the [output paths](../glossary.md) of the store
Prints out the [output path]s of the store
derivations *paths*. These are the paths that will be produced when
the derivation is built.
- `--requisites`; `-R`\
Prints out the [closure](../glossary.md) of the store path *paths*.
Prints out the [closure] of the given *paths*.
This query has one option:
@ -332,10 +341,12 @@ symlink.
derivation and specifying the option `--include-outputs`.
- `--references`\
Prints the set of [references](../glossary.md) of the store paths
Prints the set of [references]s of the store paths
*paths*, that is, their immediate dependencies. (For *all*
dependencies, use `--requisites`.)
[reference]: ../glossary.md#gloss-reference
- `--referrers`\
Prints the set of *referrers* of the store paths *paths*, that is,
the store paths currently existing in the Nix store that refer to
@ -350,11 +361,13 @@ symlink.
in the Nix store that are dependent on *paths*.
- `--deriver`; `-d`\
Prints the [deriver](../glossary.md) of the store paths *paths*. If
Prints the [deriver] of the store paths *paths*. If
the path has no deriver (e.g., if it is a source file), or if the
deriver is not known (e.g., in the case of a binary-only
deployment), the string `unknown-deriver` is printed.
[deriver]: ../glossary.md#gloss-deriver
- `--graph`\
Prints the references graph of the store paths *paths* in the format
of the `dot` tool of AT\&T's [Graphviz

36
doc/manual/src/contributing/hacking.md
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@ -92,7 +92,8 @@ $ nix develop
The unit-tests for each Nix library (`libexpr`, `libstore`, etc..) are defined
under `src/{library_name}/tests` using the
[googletest](https://google.github.io/googletest/) framework.
[googletest](https://google.github.io/googletest/) and
[rapidcheck](https://github.com/emil-e/rapidcheck) frameworks.
You can run the whole testsuite with `make check`, or the tests for a specific component with `make libfoo-tests_RUN`. Finer-grained filtering is also possible using the [--gtest_filter](https://google.github.io/googletest/advanced.html#running-a-subset-of-the-tests) command-line option.
@ -249,3 +250,36 @@ search/replaced in it for each new build.
The installer now supports a `--tarball-url-prefix` flag which _may_ have
solved this need?
-->
### Checking links in the manual
The build checks for broken internal links.
This happens late in the process, so `nix build` is not suitable for iterating.
To build the manual incrementally, run:
```console
make html -j $NIX_BUILD_CORES
```
In order to reflect changes to the [Makefile], clear all generated files before re-building:
[Makefile]: https://github.com/NixOS/nix/blob/master/doc/manual/local.mk
```console
rm $(git ls-files doc/manual/ -o | grep -F '.md') && rmdir doc/manual/src/command-ref/new-cli && make html -j $NIX_BUILD_CORES
```
[`mdbook-linkcheck`] does not implement checking [URI fragments] yet.
[`mdbook-linkcheck`]: https://github.com/Michael-F-Bryan/mdbook-linkcheck
[URI fragments]: https://en.m.wikipedia.org/wiki/URI_fragment
#### `@docroot@` variable
`@docroot@` provides a base path for links that occur in reusable snippets or other documentation that doesn't have a base path of its own.
If a broken link occurs in a snippet that was inserted into multiple generated files in different directories, use `@docroot@` to reference the `doc/manual/src` directory.
If the `@docroot@` literal appears in an error message from the `mdbook-linkcheck` tool, the `@docroot@` replacement needs to be applied to the generated source file that mentions it.
See existing `@docroot@` logic in the [Makefile].
Regular markdown files used for the manual have a base path of their own and they can use relative paths instead of `@docroot@`.

29
doc/manual/src/glossary.md
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@ -19,6 +19,17 @@
[store derivation]: #gloss-store-derivation
- [realise]{#gloss-realise}, realisation\
Ensure a [store path] is [valid][validity].
This means either running the `builder` executable as specified in the corresponding [derivation] or fetching a pre-built [store object] from a [substituter].
See [`nix-build`](./command-ref/nix-build.md) and [`nix-store --realise`](./command-ref/nix-store.md#operation---realise).
See [`nix build`](./command-ref/new-cli/nix3-build.md) (experimental).
[realise]: #gloss-realise
- [content-addressed derivation]{#gloss-content-addressed-derivation}\
A derivation which has the
[`__contentAddressed`](./language/advanced-attributes.md#adv-attr-__contentAddressed)
@ -101,6 +112,8 @@
copy store objects it doesn't have. For details, see the
[`substituters` option](./command-ref/conf-file.md#conf-substituters).
[substituter]: #gloss-substituter
- [purity]{#gloss-purity}\
The assumption that equal Nix derivations when run always produce
the same output. This cannot be guaranteed in general (e.g., a
@ -143,19 +156,25 @@
to path `Q`, then `Q` is in the closure of `P`. Further, if `Q`
references `R` then `R` is also in the closure of `P`.
[closure]: #gloss-closure
- [output path]{#gloss-output-path}\
A [store path] produced by a [derivation].
[output path]: #gloss-output-path
- [deriver]{#gloss-deriver}\
The deriver of an *output path* is the store
derivation that built it.
The [store derivation] that produced an [output path].
- [validity]{#gloss-validity}\
A store path is considered *valid* if it exists in the file system,
is listed in the Nix database as being valid, and if all paths in
its closure are also valid.
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:
- The store path leads to an existing [store object] in that [store].
- The store path is listed in the Nix database as being valid.
- All paths in the store path's [closure] are valid.
[validity]: #gloss-validity
- [user environment]{#gloss-user-env}\
An automatically generated store object that consists of a set of

6
doc/manual/src/installation/installing-binary.md
View file

@ -120,10 +120,10 @@ sudo rm -rf /nix /etc/nix /etc/profile/nix.sh ~root/.nix-profile ~root/.nix-defe
Remove build users and their group:
```console
for i in $(seq 30001 30032); do
sudo userdel $i
for i in $(seq 1 32); do
sudo userdel nixbld$i
done
sudo groupdel 30000
sudo groupdel nixbld
```
There may also be references to Nix in

4
doc/manual/src/language/index.md
View file

@ -191,12 +191,12 @@ This is an incomplete overview of language features, by example.
<tr>
<td>
<nixpkgs>
`<nixpkgs>`
</td>
<td>
Search path. Value determined by [`$NIX_PATH` environment variable](../command-ref/env-common.md#env-NIX_PATH).
Search path for Nix files. Value determined by [`$NIX_PATH` environment variable](../command-ref/env-common.md#env-NIX_PATH).
</td>
</tr>

189
doc/manual/src/language/operators.md
View file

@ -1,28 +1,167 @@
# Operators
The table below lists the operators in the Nix language, in
order of precedence (from strongest to weakest binding).
| Name | Syntax | Associativity | Precedence |
|----------------------------------------|--------------------------------------------|---------------|------------|
| [Attribute selection] | *attrset* `.` *attrpath* \[ `or` *expr* \] | none | 1 |
| Function application | *func* *expr* | left | 2 |
| [Arithmetic negation][arithmetic] | `-` *number* | none | 3 |
| [Has attribute] | *attrset* `?` *attrpath* | none | 4 |
| List concatenation | *list* `++` *list* | right | 5 |
| [Multiplication][arithmetic] | *number* `*` *number* | left | 6 |
| [Division][arithmetic] | *number* `/` *number* | left | 6 |
| [Subtraction][arithmetic] | *number* `-` *number* | left | 7 |
| [Addition][arithmetic] | *number* `+` *number* | left | 7 |
| [String concatenation] | *string* `+` *string* | left | 7 |
| [Path concatenation] | *path* `+` *path* | left | 7 |
| [Path and string concatenation] | *path* `+` *string* | left | 7 |
| [String and path concatenation] | *string* `+` *path* | left | 7 |
| Logical negation (`NOT`) | `!` *bool* | none | 8 |
| [Update] | *attrset* `//` *attrset* | right | 9 |
| [Less than][Comparison] | *expr* `<` *expr* | none | 10 |
| [Less than or equal to][Comparison] | *expr* `<=` *expr* | none | 10 |
| [Greater than][Comparison] | *expr* `>` *expr* | none | 10 |
| [Greater than or equal to][Comparison] | *expr* `>=` *expr* | none | 10 |
| [Equality] | *expr* `==` *expr* | none | 11 |
| Inequality | *expr* `!=` *expr* | none | 11 |
| Logical conjunction (`AND`) | *bool* `&&` *bool* | left | 12 |
| Logical disjunction (`OR`) | *bool* `\|\|` *bool* | left | 13 |
| [Logical implication] | *bool* `->` *bool* | none | 14 |
[string]: ./values.md#type-string
[path]: ./values.md#type-path
[number]: ./values.md#type-number
[list]: ./values.md#list
[attribute set]: ./values.md#attribute-set
## Attribute selection
Select the attribute denoted by attribute path *attrpath* from [attribute set] *attrset*.
If the attribute doesn’t exist, return *value* if provided, otherwise abort evaluation.
<!-- FIXME: the following should to into its own language syntax section, but that needs more work to fit in well -->
An attribute path is a dot-separated list of attribute names.
An attribute name can be an identifier or a string.
> *attrpath* = *name* [ `.` *name* ]...
> *name* = *identifier* | *string*
> *identifier* ~ `[a-zA-Z_][a-zA-Z0-9_'-]*`
[Attribute selection]: #attribute-selection
## Has attribute
> *attrset* `?` *attrpath*
Test whether [attribute set] *attrset* contains the attribute denoted by *attrpath*.
The result is a [Boolean] value.
[Boolean]: ./values.md#type-boolean
[Has attribute]: #has-attribute
## Arithmetic
Numbers are type-compatible:
Pure integer operations will always return integers, whereas any operation involving at least one floating point number return a floating point number.
See also [Comparison] and [Equality].
The `+` operator is overloaded to also work on strings and paths.
[arithmetic]: #arithmetic
## String concatenation
> *string* `+` *string*
Concatenate two [string]s and merge their string contexts.
[String concatenation]: #string-concatenation
## Path concatenation
> *path* `+` *path*
Concatenate two [path]s.
The result is a path.
[Path concatenation]: #path-concatenation
## Path and string concatenation
> *path* + *string*
Concatenate *[path]* with *[string]*.
The result is a path.
> **Note**
>
> The string must not have a string context that refers to a [store path].
[Path and string concatenation]: #path-and-string-concatenation
## String and path concatenation
> *string* + *path*
Concatenate *[string]* with *[path]*.
The result is a string.
> **Important**
>
> The file or directory at *path* must exist and is copied to the [store].
> The path appears in the result as the corresponding [store path].
[store path]: ../glossary.md#gloss-store-path
[store]: ../glossary.md#gloss-store
[Path and string concatenation]: #path-and-string-concatenation
## Update
> *attrset1* // *attrset2*
Update [attribute set] *attrset1* with names and values from *attrset2*.
The returned attribute set will have of all the attributes in *attrset1* and *attrset2*.
If an attribute name is present in both, the attribute value from the latter is taken.
[Update]: #update
## Comparison
Comparison is
- [arithmetic] for [number]s
- lexicographic for [string]s and [path]s
- item-wise lexicographic for [list]s:
elements at the same index in both lists are compared according to their type and skipped if they are equal.
All comparison operators are implemented in terms of `<`, and the following equivalencies hold:
| comparison | implementation |
|--------------|-----------------------|
| *a* `<=` *b* | `! (` *b* `<` *a* `)` |
| *a* `>` *b* | *b* `<` *a* |
| *a* `>=` *b* | `! (` *a* `<` *b* `)` |
[Comparison]: #comparison-operators
## Equality
- [Attribute sets][attribute set] and [list]s are compared recursively, and therefore are fully evaluated.
- Comparison of [function]s always returns `false`.
- Numbers are type-compatible, see [arithmetic] operators.
- Floating point numbers only differ up to a limited precision.
[function]: ./constructs.md#functions
[Equality]: #equality
## Logical implication
Equivalent to `!`*b1* `||` *b2*.
[Logical implication]: #logical-implication
| Name | Syntax | Associativity | Description | Precedence |
| ------------------------ | ----------------------------------- | ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- |
| Select | *e* `.` *attrpath* \[ `or` *def* \] | none | Select attribute denoted by the attribute path *attrpath* from set *e*. (An attribute path is a dot-separated list of attribute names.) If the attribute doesn’t exist, return *def* if provided, otherwise abort evaluation. | 1 |
| Application | *e1* *e2* | left | Call function *e1* with argument *e2*. | 2 |
| Arithmetic Negation | `-` *e* | none | Arithmetic negation. | 3 |
| Has Attribute | *e* `?` *attrpath* | none | Test whether set *e* contains the attribute denoted by *attrpath*; return `true` or `false`. | 4 |
| List Concatenation | *e1* `++` *e2* | right | List concatenation. | 5 |
| Multiplication | *e1* `*` *e2*, | left | Arithmetic multiplication. | 6 |
| Division | *e1* `/` *e2* | left | Arithmetic division. | 6 |
| Addition | *e1* `+` *e2* | left | Arithmetic addition. | 7 |
| Subtraction | *e1* `-` *e2* | left | Arithmetic subtraction. | 7 |
| String Concatenation | *string1* `+` *string2* | left | String concatenation. | 7 |
| Not | `!` *e* | none | Boolean negation. | 8 |
| Update | *e1* `//` *e2* | right | Return a set consisting of the attributes in *e1* and *e2* (with the latter taking precedence over the former in case of equally named attributes). | 9 |
| Less Than | *e1* `<` *e2*, | none | Arithmetic/lexicographic comparison. | 10 |
| Less Than or Equal To | *e1* `<=` *e2* | none | Arithmetic/lexicographic comparison. | 10 |
| Greater Than | *e1* `>` *e2* | none | Arithmetic/lexicographic comparison. | 10 |
| Greater Than or Equal To | *e1* `>=` *e2* | none | Arithmetic/lexicographic comparison. | 10 |
| Equality | *e1* `==` *e2* | none | Equality. | 11 |
| Inequality | *e1* `!=` *e2* | none | Inequality. | 11 |
| Logical AND | *e1* `&&` *e2* | left | Logical AND. | 12 |
| Logical OR | *e1* <code>&#124;&#124;</code> *e2* | left | Logical OR. | 13 |
| Logical Implication | *e1* `->` *e2* | none | Logical implication (equivalent to <code>!e1 &#124;&#124; e2</code>). | 14 |

7
doc/manual/src/language/values.md
View file

@ -85,9 +85,10 @@
Numbers, which can be *integers* (like `123`) or *floating point*
(like `123.43` or `.27e13`).
Numbers are type-compatible: pure integer operations will always
return integers, whereas any operation involving at least one
floating point number will have a floating point number as a result.
See [arithmetic] and [comparison] operators for semantics.
[arithmetic]: ./operators.md#arithmetic
[comparison]: ./operators.md#comparison
- <a id="type-path" href="#type-path">Path</a>

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

@ -32,13 +32,13 @@ which should print something like:
Priority: 30
On the client side, you can tell Nix to use your binary cache using
`--option extra-binary-caches`, e.g.:
`--substituters`, e.g.:
```console
$ nix-env -iA nixpkgs.firefox --option extra-binary-caches http://avalon:8080/
$ nix-env -iA nixpkgs.firefox --substituters http://avalon:8080/
```
The option `extra-binary-caches` tells Nix to use this binary cache in
The option `substituters` tells Nix to use this binary cache in
addition to your default caches, such as <https://cache.nixos.org>.
Thus, for any path in the closure of Firefox, Nix will first check if
the path is available on the server `avalon` or another binary caches.
@ -47,4 +47,4 @@ If not, it will fall back to building from source.
You can also tell Nix to always use your binary cache by adding a line
to the `nix.conf` configuration file like this:
binary-caches = http://avalon:8080/ https://cache.nixos.org/
substituters = http://avalon:8080/ https://cache.nixos.org/

44
doc/manual/src/release-notes/rl-2.13.md Normal file
View file

@ -0,0 +1,44 @@
# Release 2.13 (2023-01-17)
* The `repeat` and `enforce-determinism` options have been removed
since they had been broken under many circumstances for a long time.
* You can now use [flake references] in the [old command line interface], e.g.
[flake references]: ../command-ref/new-cli/nix3-flake.md#flake-references
[old command line interface]: ../command-ref/main-commands.md
```shell-session
# nix-build flake:nixpkgs -A hello
# nix-build -I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05 \
'<nixpkgs>' -A hello
# NIX_PATH=nixpkgs=flake:nixpkgs nix-build '<nixpkgs>' -A hello
```
* Instead of "antiquotation", the more common term [string interpolation](../language/string-interpolation.md) is now used consistently.
Historical release notes were not changed.
* Error traces have been reworked to provide detailed explanations and more
accurate error locations. A short excerpt of the trace is now shown by
default when an error occurs.
* Allow explicitly selecting outputs in a store derivation installable, just like we can do with other sorts of installables.
For example,
```shell-session
# nix build /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv^dev
```
now works just as
```shell-session
# nix build nixpkgs#glibc^dev
```
does already.
* On Linux, `nix develop` now sets the
[*personality*](https://man7.org/linux/man-pages/man2/personality.2.html)
for the development shell in the same way as the actual build of the
derivation. This makes shells for `i686-linux` derivations work
correctly on `x86_64-linux`.
* You can now disable the global flake registry by setting the `flake-registry`
configuration option to an empty string. The same can be achieved at runtime with
`--flake-registry ""`.

29
doc/manual/src/release-notes/rl-next.md
View file

@ -1,26 +1,11 @@
# Release X.Y (202?-??-??)
* A new function `builtins.readFileType` is available. It is similar to
`builtins.readDir` but acts on a single file or directory.
* The `repeat` and `enforce-determinism` options have been removed
since they had been broken under many circumstances for a long time.
* You can now use [flake references] in the [old command line interface], e.g.
[flake references]: ../command-ref/new-cli/nix3-flake.md#flake-references
[old command line interface]: ../command-ref/main-commands.md
```
# nix-build flake:nixpkgs -A hello
# nix-build -I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05 \
'<nixpkgs>' -A hello
# NIX_PATH=nixpkgs=flake:nixpkgs nix-build '<nixpkgs>' -A hello
```
* Instead of "antiquotation", the more common term [string interpolation](../language/string-interpolation.md) is now used consistently.
Historical release notes were not changed.
* Error traces have been reworked to provide detailed explanations and more
accurate error locations. A short excerpt of the trace is now shown by
default when an error occurs.
* The `builtins.readDir` function has been optimized when encountering not-yet-known
file types from POSIX's `readdir`. In such cases the type of each file is/was
discovered by making multiple syscalls. This change makes these operations
lazy such that these lookups will only be performed if the attribute is used.
This optimization affects a minority of filesystems and operating systems.
* In derivations that use structured attributes, you can now use `unsafeDiscardReferences`
to disable scanning a given output for runtime dependencies:

86
flake.nix
View file

@ -82,7 +82,9 @@
});
configureFlags =
lib.optionals stdenv.isLinux [
[
"CXXFLAGS=-I${lib.getDev rapidcheck}/extras/gtest/include"
] ++ lib.optionals stdenv.isLinux [
"--with-boost=${boost}/lib"
"--with-sandbox-shell=${sh}/bin/busybox"
]
@ -96,6 +98,7 @@
buildPackages.flex
(lib.getBin buildPackages.lowdown-nix)
buildPackages.mdbook
buildPackages.mdbook-linkcheck
buildPackages.autoconf-archive
buildPackages.autoreconfHook
buildPackages.pkg-config
@ -115,6 +118,7 @@
boost
lowdown-nix
gtest
rapidcheck
]
++ lib.optionals stdenv.isLinux [libseccomp]
++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
@ -127,9 +131,14 @@
});
propagatedDeps =
[ (boehmgc.override {
[ ((boehmgc.override {
enableLargeConfig = true;
}).overrideAttrs(o: {
patches = (o.patches or []) ++ [
./boehmgc-coroutine-sp-fallback.diff
];
})
)
nlohmann_json
];
};
@ -400,6 +409,18 @@
};
};
nixos-lib = import (nixpkgs + "/nixos/lib") { };
# https://nixos.org/manual/nixos/unstable/index.html#sec-calling-nixos-tests
runNixOSTestFor = system: test: nixos-lib.runTest {
imports = [ test ];
hostPkgs = nixpkgsFor.${system};
defaults = {
nixpkgs.pkgs = nixpkgsFor.${system};
};
_module.args.nixpkgs = nixpkgs;
};
in {
# A Nixpkgs overlay that overrides the 'nix' and
@ -456,6 +477,10 @@
src = self;
configureFlags = [
"CXXFLAGS=-I${lib.getDev pkgs.rapidcheck}/extras/gtest/include"
];
enableParallelBuilding = true;
nativeBuildInputs = nativeBuildDeps;
@ -474,49 +499,22 @@
};
# System tests.
tests.remoteBuilds = import ./tests/remote-builds.nix {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
};
tests.remoteBuilds = runNixOSTestFor "x86_64-linux" ./tests/nixos/remote-builds.nix;
tests.nix-copy-closure = import ./tests/nix-copy-closure.nix {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
};
tests.nix-copy-closure = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy-closure.nix;
tests.nssPreload = (import ./tests/nss-preload.nix rec {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
});
tests.nssPreload = runNixOSTestFor "x86_64-linux" ./tests/nixos/nss-preload.nix;
tests.githubFlakes = (import ./tests/github-flakes.nix rec {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
});
tests.githubFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/github-flakes.nix;
tests.sourcehutFlakes = (import ./tests/sourcehut-flakes.nix rec {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
});
tests.sourcehutFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/sourcehut-flakes.nix;
tests.containers = (import ./tests/containers.nix rec {
system = "x86_64-linux";
inherit nixpkgs;
overlay = self.overlays.default;
});
tests.containers = runNixOSTestFor "x86_64-linux" ./tests/nixos/containers/containers.nix;
tests.setuid = nixpkgs.lib.genAttrs
["i686-linux" "x86_64-linux"]
(system:
import ./tests/setuid.nix rec {
inherit nixpkgs system;
overlay = self.overlays.default;
});
(system: runNixOSTestFor system ./tests/nixos/setuid.nix);
# Make sure that nix-env still produces the exact same result
# on a particular version of Nixpkgs.
@ -531,6 +529,12 @@
mkdir $out
'';
tests.nixpkgsLibTests =
nixpkgs.lib.genAttrs systems (system:
import (nixpkgs + "/lib/tests/release.nix")
{ pkgs = nixpkgsFor.${system}; }
);
metrics.nixpkgs = import "${nixpkgs-regression}/pkgs/top-level/metrics.nix" {
pkgs = nixpkgsFor.x86_64-linux;
nixpkgs = nixpkgs-regression;
@ -561,6 +565,7 @@
binaryTarball = self.hydraJobs.binaryTarball.${system};
perlBindings = self.hydraJobs.perlBindings.${system};
installTests = self.hydraJobs.installTests.${system};
nixpkgsLibTests = self.hydraJobs.tests.nixpkgsLibTests.${system};
} // (nixpkgs.lib.optionalAttrs (builtins.elem system linux64BitSystems)) {
dockerImage = self.hydraJobs.dockerImage.${system};
});
@ -642,6 +647,7 @@
inherit system crossSystem;
overlays = [ self.overlays.default ];
};
inherit (nixpkgsCross) lib;
in with commonDeps { pkgs = nixpkgsCross; }; nixpkgsCross.stdenv.mkDerivation {
name = "nix-${version}";
@ -654,7 +660,11 @@
nativeBuildInputs = nativeBuildDeps;
buildInputs = buildDeps ++ propagatedDeps;
configureFlags = [ "--sysconfdir=/etc" "--disable-doc-gen" ];
configureFlags = [
"CXXFLAGS=-I${lib.getDev nixpkgsCross.rapidcheck}/extras/gtest/include"
"--sysconfdir=/etc"
"--disable-doc-gen"
];
enableParallelBuilding = true;

34
maintainers/README.md
View file

@ -36,17 +36,45 @@ Issues on the board progress through the following states:
- No Status
Team members can add pull requests or issues to discuss or review together.
During the discussion meeting, the team triages new items.
To be considered, issues and pull requests must have a high-level description to provide the whole team with the necessary context at a glance.
On every meeting, at least one item from each of the following categories is inspected:
1. [critical](https://github.com/NixOS/nix/labels/critical)
2. [security](https://github.com/NixOS/nix/labels/security)
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)
- [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)
- [oldest issues](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+sort%3Acreated-asc)
- [most popular issues](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc)
Team members can also add pull requests or issues they would like the whole team to consider.
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 discuss
Pull requests and issues that are 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.
This may be where the merit of the change itself or the implementation strategy is contested by a team member.
As a general guideline, the order of items is determined as follows:
- Prioritise pull requests over issues
Contributors who took the time to implement concrete change proposals should not wait indefinitely.
- Prioritise fixing bugs over documentation, improvements or new features
The team values stability and accessibility higher than raw functionality.
- Interleave issues and PRs
This way issues without attempts at a solution get a chance to get addressed.
- In review
Pull requests in this column are reviewed together during work meetings.

7
scripts/install-systemd-multi-user.sh
View file

@ -24,12 +24,17 @@ $1
EOF
}
escape_systemd_env() {
temp_var="${1//\'/\\\'}"
echo "${temp_var//\%/%%}"
}
# Gather all non-empty proxy environment variables into a string
create_systemd_proxy_env() {
vars="http_proxy https_proxy ftp_proxy no_proxy HTTP_PROXY HTTPS_PROXY FTP_PROXY NO_PROXY"
for v in $vars; do
if [ "x${!v:-}" != "x" ]; then
echo "Environment=${v}=${!v}"
echo "Environment=${v}=$(escape_systemd_env ${!v})"
fi
done
}

18
scripts/nix-profile-daemon.fish.in
View file

@ -1,3 +1,15 @@
function add_path --argument-names new_path
if type -q fish_add_path
# fish 3.2.0 or newer
fish_add_path --prepend --global $new_path
else
# older versions of fish
if not contains $new_path $fish_user_paths
set --global fish_user_paths $new_path $fish_user_paths
end
end
end
# Only execute this file once per shell.
if test -n "$__ETC_PROFILE_NIX_SOURCED"
exit
@ -31,5 +43,7 @@ else
end
end
fish_add_path --prepend --global "@localstatedir@/nix/profiles/default/bin"
fish_add_path --prepend --global "$HOME/.nix-profile/bin"
add_path "@localstatedir@/nix/profiles/default/bin"
add_path "$HOME/.nix-profile/bin"
functions -e add_path

16
scripts/nix-profile.fish.in
View file

@ -1,3 +1,15 @@
function add_path --argument-names new_path
if type -q fish_add_path
# fish 3.2.0 or newer
fish_add_path --prepend --global $new_path
else
# older versions of fish
if not contains $new_path $fish_user_paths
set --global fish_user_paths $new_path $fish_user_paths
end
end
end
if test -n "$HOME" && test -n "$USER"
# Set up the per-user profile.
@ -32,6 +44,8 @@ if test -n "$HOME" && test -n "$USER"
set --export --prepend --path MANPATH "$NIX_LINK/share/man"
end
fish_add_path --prepend --global "$NIX_LINK/bin"
add_path "$NIX_LINK/bin"
set --erase NIX_LINK
end
functions -e add_path

4
src/libcmd/common-eval-args.cc
View file

@ -34,8 +34,8 @@ MixEvalArgs::MixEvalArgs()
.shortName = 'I',
.description = R"(
Add *path* to the Nix search path. The Nix search path is
initialized from the colon-separated [`NIX_PATH`](./env-common.md#env-NIX_PATH) environment
variable, and is used to look up the location of Nix expressions using [paths](../language/values.md#type-path) enclosed in angle
initialized from the colon-separated [`NIX_PATH`](@docroot@/command-ref/env-common.md#env-NIX_PATH) environment
variable, and is used to look up the location of Nix expressions using [paths](@docroot@/language/values.md#type-path) enclosed in angle
brackets (i.e., `<nixpkgs>`).
For instance, passing

335
src/libcmd/installables.cc
View file

@ -1,5 +1,6 @@
#include "globals.hh"
#include "installables.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
#include "attr-path.hh"
@ -358,7 +359,7 @@ void completeFlakeRef(ref<Store> store, std::string_view prefix)
}
}
DerivedPath Installable::toDerivedPath()
DerivedPathWithInfo Installable::toDerivedPath()
{
auto buildables = toDerivedPaths();
if (buildables.size() != 1)
@ -401,18 +402,6 @@ struct InstallableStorePath : Installable
ref<Store> store;
DerivedPath req;
InstallableStorePath(ref<Store> store, StorePath && storePath)
: store(store),
req(storePath.isDerivation()
? (DerivedPath) DerivedPath::Built {
.drvPath = std::move(storePath),
.outputs = {},
}
: (DerivedPath) DerivedPath::Opaque {
.path = std::move(storePath),
})
{ }
InstallableStorePath(ref<Store> store, DerivedPath && req)
: store(store), req(std::move(req))
{ }
@ -422,21 +411,9 @@ struct InstallableStorePath : Installable
return req.to_string(*store);
}
DerivedPaths toDerivedPaths() override
DerivedPathsWithInfo toDerivedPaths() override
{
return { req };
}
StorePathSet toDrvPaths(ref<Store> store) override
{
return std::visit(overloaded {
[&](const DerivedPath::Built & bfd) -> StorePathSet {
return { bfd.drvPath };
},
[&](const DerivedPath::Opaque & bo) -> StorePathSet {
return { getDeriver(store, *this, bo.path) };
},
}, req.raw());
return {{.path = req, .info = {} }};
}
std::optional<StorePath> getStorePath() override
@ -452,52 +429,24 @@ struct InstallableStorePath : Installable
}
};
DerivedPaths InstallableValue::toDerivedPaths()
{
DerivedPaths res;
std::map<StorePath, std::set<std::string>> drvsToOutputs;
RealisedPath::Set drvsToCopy;
// Group by derivation, helps with .all in particular
for (auto & drv : toDerivations()) {
for (auto & outputName : drv.outputsToInstall)
drvsToOutputs[drv.drvPath].insert(outputName);
drvsToCopy.insert(drv.drvPath);
}
for (auto & i : drvsToOutputs)
res.push_back(DerivedPath::Built { i.first, i.second });
return res;
}
StorePathSet InstallableValue::toDrvPaths(ref<Store> store)
{
StorePathSet res;
for (auto & drv : toDerivations())
res.insert(drv.drvPath);
return res;
}
struct InstallableAttrPath : InstallableValue
{
SourceExprCommand & cmd;
RootValue v;
std::string attrPath;
OutputsSpec outputsSpec;
ExtendedOutputsSpec extendedOutputsSpec;
InstallableAttrPath(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
const std::string & attrPath,
OutputsSpec outputsSpec)
ExtendedOutputsSpec extendedOutputsSpec)
: InstallableValue(state)
, cmd(cmd)
, v(allocRootValue(v))
, attrPath(attrPath)
, outputsSpec(std::move(outputsSpec))
, extendedOutputsSpec(std::move(extendedOutputsSpec))
{ }
std::string what() const override { return attrPath; }
@ -509,11 +458,8 @@ struct InstallableAttrPath : InstallableValue
return {vRes, pos};
}
virtual std::vector<InstallableValue::DerivationInfo> toDerivations() override;
};
std::vector<InstallableValue::DerivationInfo> InstallableAttrPath::toDerivations()
{
DerivedPathsWithInfo toDerivedPaths() override
{
auto v = toValue(*state).first;
Bindings & autoArgs = *cmd.getAutoArgs(*state);
@ -521,28 +467,45 @@ std::vector<InstallableValue::DerivationInfo> InstallableAttrPath::toDerivations
DrvInfos drvInfos;
getDerivations(*state, *v, "", autoArgs, drvInfos, false);
std::vector<DerivationInfo> res;
// Backward compatibility hack: group results by drvPath. This
// helps keep .all output together.
std::map<StorePath, OutputsSpec> byDrvPath;
for (auto & drvInfo : drvInfos) {
auto drvPath = drvInfo.queryDrvPath();
if (!drvPath)
throw Error("'%s' is not a derivation", what());
auto newOutputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
outputsToInstall = *outputNames;
else
for (auto & output : drvInfo.queryOutputs(false, std::get_if<DefaultOutputs>(&outputsSpec)))
for (auto & output : drvInfo.queryOutputs(false, true))
outputsToInstall.insert(output.first);
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw());
res.push_back(DerivationInfo {
.drvPath = *drvPath,
.outputsToInstall = std::move(outputsToInstall)
});
auto [iter, didInsert] = byDrvPath.emplace(*drvPath, newOutputs);
if (!didInsert)
iter->second = iter->second.union_(newOutputs);
}
DerivedPathsWithInfo res;
for (auto & [drvPath, outputs] : byDrvPath)
res.push_back({
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = outputs,
},
});
return res;
}
}
};
std::vector<std::string> InstallableFlake::getActualAttrPaths()
{
@ -615,7 +578,7 @@ InstallableFlake::InstallableFlake(
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
OutputsSpec outputsSpec,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags)
@ -623,14 +586,14 @@ InstallableFlake::InstallableFlake(
flakeRef(flakeRef),
attrPaths(fragment == "" ? attrPaths : Strings{(std::string) fragment}),
prefixes(fragment == "" ? Strings{} : prefixes),
outputsSpec(std::move(outputsSpec)),
extendedOutputsSpec(std::move(extendedOutputsSpec)),
lockFlags(lockFlags)
{
if (cmd && cmd->getAutoArgs(*state)->size())
throw UsageError("'--arg' and '--argstr' are incompatible with flakes");
}
std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableFlake::toDerivation()
DerivedPathsWithInfo InstallableFlake::toDerivedPaths()
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("evaluating derivation '%s'", what()));
@ -638,56 +601,84 @@ std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableF
auto attrPath = attr->getAttrPathStr();
if (!attr->isDerivation())
throw Error("flake output attribute '%s' is not a derivation", attrPath);
if (!attr->isDerivation()) {
// FIXME: use eval cache?
auto v = attr->forceValue();
if (v.type() == nPath) {
PathSet context;
auto storePath = state->copyPathToStore(context, Path(v.path));
return {{
.path = DerivedPath::Opaque {
.path = std::move(storePath),
}
}};
}
else if (v.type() == nString) {
PathSet context;
auto s = state->forceString(v, context, noPos, fmt("while evaluating the flake output attribute '%s'", attrPath));
auto storePath = state->store->maybeParseStorePath(s);
if (storePath && context.count(std::string(s))) {
return {{
.path = DerivedPath::Opaque {
.path = std::move(*storePath),
}
}};
} else
throw Error("flake output attribute '%s' evaluates to the string '%s' which is not a store path", attrPath, s);
}
else
throw Error("flake output attribute '%s' is not a derivation or path", attrPath);
}
auto drvPath = attr->forceDerivation();
std::set<std::string> outputsToInstall;
std::optional<NixInt> priority;
if (attr->maybeGetAttr(state->sOutputSpecified)) {
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aPriority = aMeta->maybeGetAttr("priority"))
priority = aPriority->getInt();
}
return {{
.path = DerivedPath::Built {
.drvPath = std::move(drvPath),
.outputs = std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
std::set<std::string> outputsToInstall;
if (auto aOutputSpecified = attr->maybeGetAttr(state->sOutputSpecified)) {
if (aOutputSpecified->getBool()) {
if (auto aOutputName = attr->maybeGetAttr("outputName"))
outputsToInstall = { aOutputName->getString() };
}
}
else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
} else if (auto aMeta = attr->maybeGetAttr(state->sMeta)) {
if (auto aOutputsToInstall = aMeta->maybeGetAttr("outputsToInstall"))
for (auto & s : aOutputsToInstall->getListOfStrings())
outputsToInstall.insert(s);
if (auto aPriority = aMeta->maybeGetAttr("priority"))
priority = aPriority->getInt();
}
if (outputsToInstall.empty() || std::get_if<AllOutputs>(&outputsSpec)) {
outputsToInstall.clear();
if (auto aOutputs = attr->maybeGetAttr(state->sOutputs))
for (auto & s : aOutputs->getListOfStrings())
outputsToInstall.insert(s);
}
if (outputsToInstall.empty())
outputsToInstall.insert("out");
if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
outputsToInstall = *outputNames;
auto drvInfo = DerivationInfo {
.drvPath = std::move(drvPath),
.outputsToInstall = std::move(outputsToInstall),
return OutputsSpec::Names { std::move(outputsToInstall) };
},
[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
return e;
},
}, extendedOutputsSpec.raw()),
},
.info = {
.priority = priority,
};
return {attrPath, getLockedFlake()->flake.lockedRef, std::move(drvInfo)};
}
std::vector<InstallableValue::DerivationInfo> InstallableFlake::toDerivations()
{
std::vector<DerivationInfo> res;
res.push_back(std::get<2>(toDerivation()));
return res;
.originalRef = flakeRef,
.resolvedRef = getLockedFlake()->flake.lockedRef,
.attrPath = attrPath,
.extendedOutputsSpec = extendedOutputsSpec,
}
}};
}
std::pair<Value *, PosIdx> InstallableFlake::toValue(EvalState & state)
@ -802,12 +793,12 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
}
for (auto & s : ss) {
auto [prefix, outputsSpec] = parseOutputsSpec(s);
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(s);
result.push_back(
std::make_shared<InstallableAttrPath>(
state, *this, vFile,
prefix == "." ? "" : prefix,
outputsSpec));
prefix == "." ? "" : std::string { prefix },
extendedOutputsSpec));
}
} else {
@ -815,24 +806,46 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
for (auto & s : ss) {
std::exception_ptr ex;
auto found = s.rfind('^');
if (found != std::string::npos) {
try {
result.push_back(std::make_shared<InstallableStorePath>(
store,
DerivedPath::Built::parse(*store, s.substr(0, found), s.substr(found + 1))));
continue;
} catch (BadStorePath &) {
} catch (...) {
if (!ex)
ex = std::current_exception();
}
}
auto [prefix_, extendedOutputsSpec_] = ExtendedOutputsSpec::parse(s);
// To avoid clang's pedantry
auto prefix = std::move(prefix_);
auto extendedOutputsSpec = std::move(extendedOutputsSpec_);
found = s.find('/');
auto found = prefix.find('/');
if (found != std::string::npos) {
try {
result.push_back(std::make_shared<InstallableStorePath>(store, store->followLinksToStorePath(s)));
auto derivedPath = std::visit(overloaded {
// If the user did not use ^, we treat the output more liberally.
[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
// First, we accept a symlink chain or an actual store path.
auto storePath = store->followLinksToStorePath(prefix);
// Second, we see if the store path ends in `.drv` to decide what sort
// of derived path they want.
//
// This handling predates the `^` syntax. The `^*` in
// `/nix/store/hash-foo.drv^*` unambiguously means "do the
// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
// also unambiguously mean "do the DerivedPath::Opaque` case".
//
// Issue #7261 tracks reconsidering this `.drv` dispatching.
return storePath.isDerivation()
? (DerivedPath) DerivedPath::Built {
.drvPath = std::move(storePath),
.outputs = OutputsSpec::All {},
}
: (DerivedPath) DerivedPath::Opaque {
.path = std::move(storePath),
};
},
// If the user did use ^, we just do exactly what is written.
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
return DerivedPath::Built {
.drvPath = store->parseStorePath(prefix),
.outputs = outputSpec,
};
},
}, extendedOutputsSpec.raw());
result.push_back(std::make_shared<InstallableStorePath>(store, std::move(derivedPath)));
continue;
} catch (BadStorePath &) {
} catch (...) {
@ -842,13 +855,13 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
}
try {
auto [flakeRef, fragment, outputsSpec] = parseFlakeRefWithFragmentAndOutputsSpec(s, absPath("."));
auto [flakeRef, fragment] = parseFlakeRefWithFragment(std::string { prefix }, absPath("."));
result.push_back(std::make_shared<InstallableFlake>(
this,
getEvalState(),
std::move(flakeRef),
fragment,
outputsSpec,
extendedOutputsSpec,
getDefaultFlakeAttrPaths(),
getDefaultFlakeAttrPathPrefixes(),
lockFlags));
@ -895,13 +908,19 @@ std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> Instal
if (mode == Realise::Nothing)
settings.readOnlyMode = true;
struct Aux
{
ExtraPathInfo info;
std::shared_ptr<Installable> installable;
};
std::vector<DerivedPath> pathsToBuild;
std::map<DerivedPath, std::vector<std::shared_ptr<Installable>>> backmap;
std::map<DerivedPath, std::vector<Aux>> backmap;
for (auto & i : installables) {
for (auto b : i->toDerivedPaths()) {
pathsToBuild.push_back(b);
backmap[b].push_back(i);
pathsToBuild.push_back(b.path);
backmap[b.path].push_back({.info = b.info, .installable = i});
}
}
@ -914,42 +933,18 @@ std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> Instal
printMissing(store, pathsToBuild, lvlError);
for (auto & path : pathsToBuild) {
for (auto & installable : backmap[path]) {
for (auto & aux : backmap[path]) {
std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
OutputPathMap outputs;
auto drv = evalStore->readDerivation(bfd.drvPath);
auto outputHashes = staticOutputHashes(*evalStore, drv); // FIXME: expensive
auto drvOutputs = drv.outputsAndOptPaths(*store);
for (auto & output : bfd.outputs) {
auto outputHash = get(outputHashes, output);
if (!outputHash)
throw Error(
"the derivation '%s' doesn't have an output named '%s'",
store->printStorePath(bfd.drvPath), output);
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
DrvOutput outputId { *outputHash, output };
auto realisation = store->queryRealisation(outputId);
if (!realisation)
throw Error(
"cannot operate on an output of the "
"unbuilt derivation '%s'",
outputId.to_string());
outputs.insert_or_assign(output, realisation->outPath);
} else {
// If ca-derivations isn't enabled, assume that
// the output path is statically known.
auto drvOutput = get(drvOutputs, output);
assert(drvOutput);
assert(drvOutput->second);
outputs.insert_or_assign(
output, *drvOutput->second);
}
}
res.push_back({installable, {.path = BuiltPath::Built { bfd.drvPath, outputs }}});
auto outputs = resolveDerivedPath(*store, bfd, &*evalStore);
res.push_back({aux.installable, {
.path = BuiltPath::Built { bfd.drvPath, outputs },
.info = aux.info}});
},
[&](const DerivedPath::Opaque & bo) {
res.push_back({installable, {.path = BuiltPath::Opaque { bo.path }}});
res.push_back({aux.installable, {
.path = BuiltPath::Opaque { bo.path },
.info = aux.info}});
},
}, path.raw());
}
@ -965,16 +960,22 @@ std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> Instal
if (!buildResult.success())
buildResult.rethrow();
for (auto & installable : backmap[buildResult.path]) {
for (auto & aux : backmap[buildResult.path]) {
std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
std::map<std::string, StorePath> outputs;
for (auto & path : buildResult.builtOutputs)
outputs.emplace(path.first.outputName, path.second.outPath);
res.push_back({installable, {.path = BuiltPath::Built { bfd.drvPath, outputs }, .result = buildResult}});
res.push_back({aux.installable, {
.path = BuiltPath::Built { bfd.drvPath, outputs },
.info = aux.info,
.result = buildResult}});
},
[&](const DerivedPath::Opaque & bo) {
res.push_back({installable, {.path = BuiltPath::Opaque { bo.path }, .result = buildResult}});
res.push_back({aux.installable, {
.path = BuiltPath::Opaque { bo.path },
.info = aux.info,
.result = buildResult}});
},
}, buildResult.path.raw());
}
@ -1059,7 +1060,7 @@ StorePathSet Installable::toDerivations(
[&](const DerivedPath::Built & bfd) {
drvPaths.insert(bfd.drvPath);
},
}, b.raw());
}, b.path.raw());
return drvPaths;
}

55
src/libcmd/installables.hh
View file

@ -2,7 +2,7 @@
#include "util.hh"
#include "path.hh"
#include "path-with-outputs.hh"
#include "outputs-spec.hh"
#include "derived-path.hh"
#include "eval.hh"
#include "store-api.hh"
@ -20,7 +20,7 @@ namespace eval_cache { class EvalCache; class AttrCursor; }
struct App
{
std::vector<StorePathWithOutputs> context;
std::vector<DerivedPath> context;
Path program;
// FIXME: add args, sandbox settings, metadata, ...
};
@ -52,26 +52,42 @@ enum class OperateOn {
Derivation
};
struct ExtraPathInfo
{
std::optional<NixInt> priority;
std::optional<FlakeRef> originalRef;
std::optional<FlakeRef> resolvedRef;
std::optional<std::string> attrPath;
// FIXME: merge with DerivedPath's 'outputs' field?
std::optional<ExtendedOutputsSpec> extendedOutputsSpec;
};
/* A derived path with any additional info that commands might
need from the derivation. */
struct DerivedPathWithInfo
{
DerivedPath path;
ExtraPathInfo info;
};
struct BuiltPathWithResult
{
BuiltPath path;
ExtraPathInfo info;
std::optional<BuildResult> result;
};
typedef std::vector<DerivedPathWithInfo> DerivedPathsWithInfo;
struct Installable
{
virtual ~Installable() { }
virtual std::string what() const = 0;
virtual DerivedPaths toDerivedPaths() = 0;
virtual DerivedPathsWithInfo toDerivedPaths() = 0;
virtual StorePathSet toDrvPaths(ref<Store> store)
{
throw Error("'%s' cannot be converted to a derivation path", what());
}
DerivedPath toDerivedPath();
DerivedPathWithInfo toDerivedPath();
UnresolvedApp toApp(EvalState & state);
@ -146,19 +162,6 @@ struct InstallableValue : Installable
ref<EvalState> state;
InstallableValue(ref<EvalState> state) : state(state) {}
struct DerivationInfo
{
StorePath drvPath;
std::set<std::string> outputsToInstall;
std::optional<NixInt> priority;
};
virtual std::vector<DerivationInfo> toDerivations() = 0;
DerivedPaths toDerivedPaths() override;
StorePathSet toDrvPaths(ref<Store> store) override;
};
struct InstallableFlake : InstallableValue
@ -166,7 +169,7 @@ struct InstallableFlake : InstallableValue
FlakeRef flakeRef;
Strings attrPaths;
Strings prefixes;
OutputsSpec outputsSpec;
ExtendedOutputsSpec extendedOutputsSpec;
const flake::LockFlags & lockFlags;
mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
@ -175,7 +178,7 @@ struct InstallableFlake : InstallableValue
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
OutputsSpec outputsSpec,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags);
@ -186,9 +189,7 @@ struct InstallableFlake : InstallableValue
Value * getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake);
std::tuple<std::string, FlakeRef, DerivationInfo> toDerivation();
std::vector<DerivationInfo> toDerivations() override;
DerivedPathsWithInfo toDerivedPaths() override;
std::pair<Value *, PosIdx> toValue(EvalState & state) override;

9
src/libcmd/repl.cc
View file

@ -397,7 +397,7 @@ StringSet NixRepl::completePrefix(const std::string & prefix)
Expr * e = parseString(expr);
Value v;
e->eval(*state, *env, v);
state->forceAttrs(v, noPos, "nevermind, it is ignored anyway");
state->forceAttrs(v, noPos, "while evaluating an attrset for the purpose of completion (this error should not be displayed; file an issue?)");
for (auto & i : *v.attrs) {
std::string_view name = state->symbols[i.name];
@ -641,7 +641,12 @@ bool NixRepl::processLine(std::string line)
Path drvPathRaw = state->store->printStorePath(drvPath);
if (command == ":b" || command == ":bl") {
state->store->buildPaths({DerivedPath::Built{drvPath}});
state->store->buildPaths({
DerivedPath::Built {
.drvPath = drvPath,
.outputs = OutputsSpec::All { },
},
});
auto drv = state->store->readDerivation(drvPath);
logger->cout("\nThis derivation produced the following outputs:");
for (auto & [outputName, outputPath] : state->store->queryDerivationOutputMap(drvPath)) {

15
src/libexpr/eval-cache.cc
View file

@ -300,7 +300,7 @@ struct AttrDb
NixStringContext context;
if (!queryAttribute.isNull(3))
for (auto & s : tokenizeString<std::vector<std::string>>(queryAttribute.getStr(3), ";"))
context.push_back(decodeContext(cfg, s));
context.push_back(NixStringContextElem::parse(cfg, s));
return {{rowId, string_t{queryAttribute.getStr(2), context}}};
}
case AttrType::Bool:
@ -592,7 +592,18 @@ string_t AttrCursor::getStringWithContext()
if (auto s = std::get_if<string_t>(&cachedValue->second)) {
bool valid = true;
for (auto & c : s->second) {
if (!root->state.store->isValidPath(c.first)) {
const StorePath & path = std::visit(overloaded {
[&](const NixStringContextElem::DrvDeep & d) -> const StorePath & {
return d.drvPath;
},
[&](const NixStringContextElem::Built & b) -> const StorePath & {
return b.drvPath;
},
[&](const NixStringContextElem::Opaque & o) -> const StorePath & {
return o.path;
},
}, c.raw());
if (!root->state.store->isValidPath(path)) {
valid = false;
break;
}

133
src/libexpr/eval.cc
View file

@ -11,7 +11,9 @@
#include <algorithm>
#include <chrono>
#include <iostream>
#include <cstring>
#include <optional>
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
@ -517,6 +519,7 @@ EvalState::EvalState(
static_assert(sizeof(Env) <= 16, "environment must be <= 16 bytes");
/* Initialise the Nix expression search path. */
evalSettings.nixPath.setDefault(evalSettings.getDefaultNixPath());
if (!evalSettings.pureEval) {
for (auto & i : _searchPath) addToSearchPath(i);
for (auto & i : evalSettings.nixPath.get()) addToSearchPath(i);
@ -1927,7 +1930,9 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
/* skip canonization of first path, which would only be not
canonized in the first place if it's coming from a ./${foo} type
path */
auto part = state.coerceToString(i_pos, vTmp, context, false, firstType == nString, !first, "while evaluating a path segment");
auto part = state.coerceToString(i_pos, vTmp, context,
"while evaluating a path segment",
false, firstType == nString, !first);
sSize += part->size();
s.emplace_back(std::move(part));
}
@ -2068,27 +2073,6 @@ std::string_view EvalState::forceString(Value & v, const PosIdx pos, std::string
}
/* Decode a context string ‘!<name>!<path>’ into a pair <path,
name>. */
NixStringContextElem decodeContext(const Store & store, std::string_view s)
{
if (s.at(0) == '!') {
size_t index = s.find("!", 1);
return {
store.parseStorePath(s.substr(index + 1)),
std::string(s.substr(1, index - 1)),
};
} else
return {
store.parseStorePath(
s.at(0) == '/'
? s
: s.substr(1)),
"",
};
}
void copyContext(const Value & v, PathSet & context)
{
if (v.string.context)
@ -2103,7 +2087,7 @@ NixStringContext Value::getContext(const Store & store)
assert(internalType == tString);
if (string.context)
for (const char * * p = string.context; *p; ++p)
res.push_back(decodeContext(store, *p));
res.push_back(NixStringContextElem::parse(store, *p));
return res;
}
@ -2144,15 +2128,16 @@ std::optional<std::string> EvalState::tryAttrsToString(const PosIdx pos, Value &
if (i != v.attrs->end()) {
Value v1;
callFunction(*i->value, v, v1, pos);
return coerceToString(pos, v1, context, coerceMore, copyToStore,
"while evaluating the result of the `toString` attribute").toOwned();
return coerceToString(pos, v1, context,
"while evaluating the result of the `__toString` attribute",
coerceMore, copyToStore).toOwned();
}
return {};
}
BackedStringView EvalState::coerceToString(const PosIdx pos, Value & v, PathSet & context,
bool coerceMore, bool copyToStore, bool canonicalizePath, std::string_view errorCtx)
BackedStringView EvalState::coerceToString(const PosIdx pos, Value &v, PathSet &context,
std::string_view errorCtx, bool coerceMore, bool copyToStore, bool canonicalizePath)
{
forceValue(v, pos);
@ -2166,7 +2151,7 @@ BackedStringView EvalState::coerceToString(const PosIdx pos, Value & v, PathSet
if (canonicalizePath)
path = canonPath(*path);
if (copyToStore)
path = copyPathToStore(context, std::move(path).toOwned());
path = store->printStorePath(copyPathToStore(context, std::move(path).toOwned()));
return path;
}
@ -2175,13 +2160,23 @@ BackedStringView EvalState::coerceToString(const PosIdx pos, Value & v, PathSet
if (maybeString)
return std::move(*maybeString);
auto i = v.attrs->find(sOutPath);
if (i == v.attrs->end())
error("cannot coerce a set to a string", showType(v)).withTrace(pos, errorCtx).debugThrow<TypeError>();
return coerceToString(pos, *i->value, context, coerceMore, copyToStore, canonicalizePath, errorCtx);
if (i == v.attrs->end()) {
error("cannot coerce %1% to a string", showType(v))
.withTrace(pos, errorCtx)
.debugThrow<TypeError>();
}
return coerceToString(pos, *i->value, context, errorCtx,
coerceMore, copyToStore, canonicalizePath);
}
if (v.type() == nExternal)
return v.external->coerceToString(positions[pos], context, coerceMore, copyToStore, errorCtx);
if (v.type() == nExternal) {
try {
return v.external->coerceToString(positions[pos], context, coerceMore, copyToStore);
} catch (Error & e) {
e.addTrace(nullptr, errorCtx);
throw;
}
}
if (coerceMore) {
/* Note that `false' is represented as an empty string for
@ -2196,8 +2191,9 @@ BackedStringView EvalState::coerceToString(const PosIdx pos, Value & v, PathSet
std::string result;
for (auto [n, v2] : enumerate(v.listItems())) {
try {
result += *coerceToString(noPos, *v2, context, coerceMore, copyToStore, canonicalizePath,
"while evaluating one element of the list");
result += *coerceToString(noPos, *v2, context,
"while evaluating one element of the list",
coerceMore, copyToStore, canonicalizePath);
} catch (Error & e) {
e.addTrace(positions[pos], errorCtx);
throw;
@ -2211,37 +2207,39 @@ BackedStringView EvalState::coerceToString(const PosIdx pos, Value & v, PathSet
}
}
error("cannot coerce %1% to a string", showType(v)).withTrace(pos, errorCtx).debugThrow<TypeError>();
error("cannot coerce %1% to a string", showType(v))
.withTrace(pos, errorCtx)
.debugThrow<TypeError>();
}
std::string EvalState::copyPathToStore(PathSet & context, const Path & path)
StorePath EvalState::copyPathToStore(PathSet & context, const Path & path)
{
if (nix::isDerivation(path))
error("file names are not allowed to end in '%1%'", drvExtension).debugThrow<EvalError>();
Path dstPath;
auto dstPath = [&]() -> StorePath
{
auto i = srcToStore.find(path);
if (i != srcToStore.end())
dstPath = store->printStorePath(i->second);
else {
auto p = settings.readOnlyMode
if (i != srcToStore.end()) return i->second;
auto dstPath = settings.readOnlyMode
? store->computeStorePathForPath(std::string(baseNameOf(path)), checkSourcePath(path)).first
: store->addToStore(std::string(baseNameOf(path)), checkSourcePath(path), FileIngestionMethod::Recursive, htSHA256, defaultPathFilter, repair);
dstPath = store->printStorePath(p);
allowPath(p);
srcToStore.insert_or_assign(path, std::move(p));
printMsg(lvlChatty, "copied source '%1%' -> '%2%'", path, dstPath);
}
allowPath(dstPath);
srcToStore.insert_or_assign(path, dstPath);
printMsg(lvlChatty, "copied source '%1%' -> '%2%'", path, store->printStorePath(dstPath));
return dstPath;
}();
context.insert(dstPath);
context.insert(store->printStorePath(dstPath));
return dstPath;
}
Path EvalState::coerceToPath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx)
{
auto path = coerceToString(pos, v, context, false, false, true, errorCtx).toOwned();
auto path = coerceToString(pos, v, context, errorCtx, false, false, true).toOwned();
if (path == "" || path[0] != '/')
error("string '%1%' doesn't represent an absolute path", path).withTrace(pos, errorCtx).debugThrow<EvalError>();
return path;
@ -2250,7 +2248,7 @@ Path EvalState::coerceToPath(const PosIdx pos, Value & v, PathSet & context, std
StorePath EvalState::coerceToStorePath(const PosIdx pos, Value & v, PathSet & context, std::string_view errorCtx)
{
auto path = coerceToString(pos, v, context, false, false, true, errorCtx).toOwned();
auto path = coerceToString(pos, v, context, errorCtx, false, false, true).toOwned();
if (auto storePath = store->maybeParseStorePath(path))
return *storePath;
error("path '%1%' is not in the Nix store", path).withTrace(pos, errorCtx).debugThrow<EvalError>();
@ -2454,13 +2452,11 @@ void EvalState::printStats()
}
std::string ExternalValueBase::coerceToString(const Pos & pos, PathSet & context, bool copyMore, bool copyToStore, std::string_view errorCtx) const
std::string ExternalValueBase::coerceToString(const Pos & pos, PathSet & context, bool copyMore, bool copyToStore) const
{
auto e = TypeError({
throw TypeError({
.msg = hintfmt("cannot coerce %1% to a string", showType())
});
e.addTrace(pos, errorCtx);
throw e;
}
@ -2477,30 +2473,35 @@ std::ostream & operator << (std::ostream & str, const ExternalValueBase & v) {
EvalSettings::EvalSettings()
{
auto var = getEnv("NIX_PATH");
if (var) nixPath = parseNixPath(*var);
}
/* impure => NIX_PATH or a default path
* restrict-eval => NIX_PATH
* pure-eval => empty
*/
Strings EvalSettings::getDefaultNixPath()
{
Strings res;
auto add = [&](const Path & p, const std::string & s = std::string()) {
if (pathExists(p)) {
if (s.empty()) {
res.push_back(p);
if (pureEval)
return {};
auto var = getEnv("NIX_PATH");
if (var) {
return parseNixPath(*var);
} else if (restrictEval) {
return {};
} else {
res.push_back(s + "=" + p);
}
}
Strings res;
auto add = [&](const Path & p, const std::optional<std::string> & s = std::nullopt) {
if (pathExists(p))
res.push_back(s ? *s + "=" + p : p);
};
if (!evalSettings.restrictEval && !evalSettings.pureEval) {
add(getHome() + "/.nix-defexpr/channels");
add(settings.nixStateDir + "/profiles/per-user/root/channels/nixpkgs", "nixpkgs");
add(settings.nixStateDir + "/profiles/per-user/root/channels");
}
return res;
}
}
bool EvalSettings::isPseudoUrl(std::string_view s)

26
src/libexpr/eval.hh
View file

@ -203,6 +203,9 @@ public:
throw std::move(error);
}
// This is dangerous, but gets in line with the idea that error creation and
// throwing should not allocate on the stack of hot functions.
// as long as errors are immediately thrown, it works.
ErrorBuilder * errorBuilder;
template<typename... Args>
@ -375,11 +378,11 @@ public:
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,
std::string_view errorCtx,
bool coerceMore = false, bool copyToStore = true,
bool canonicalizePath = true,
std::string_view errorCtx = "");
bool canonicalizePath = true);
std::string 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
@ -551,10 +554,6 @@ struct DebugTraceStacker {
std::string_view showType(ValueType type);
std::string showType(const Value & v);
/* Decode a context string ‘!<name>!<path>’ into a pair <path,
name>. */
NixStringContextElem decodeContext(const Store & store, std::string_view s);
/* If `path' refers to a directory, then append "/default.nix". */
Path resolveExprPath(Path path);
@ -571,7 +570,7 @@ struct EvalSettings : Config
{
EvalSettings();
static Strings getDefaultNixPath();
Strings getDefaultNixPath();
static bool isPseudoUrl(std::string_view s);
@ -581,8 +580,15 @@ struct EvalSettings : Config
"Whether builtin functions that allow executing native code should be enabled."};
Setting<Strings> nixPath{
this, getDefaultNixPath(), "nix-path",
"List of directories to be searched for `<...>` file references."};
this, {}, "nix-path",
R"(
List of directories to be searched for `<...>` file references.
If [pure evaluation](#conf-pure-eval) is disabled,
this is initialised using the [`NIX_PATH`](@docroot@/command-ref/env-common.md#env-NIX_PATH)
environment variable, or, if it is unset and [restricted evaluation](#conf-restrict-eval)
is disabled, a default search path including the user's and `root`'s channels.
)"};
Setting<bool> restrictEval{
this, false, "restrict-eval",

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

@ -264,7 +264,7 @@ static Flake getFlake(
PathSet emptyContext = {};
flake.config.settings.emplace(
state.symbols[setting.name],
state.coerceToString(setting.pos, *setting.value, emptyContext, false, true, true, "") .toOwned());
state.coerceToString(setting.pos, *setting.value, emptyContext, "", false, true, true) .toOwned());
}
else if (setting.value->type() == nInt)
flake.config.settings.emplace(

8
src/libexpr/flake/flakeref.cc
View file

@ -238,15 +238,15 @@ std::pair<fetchers::Tree, FlakeRef> FlakeRef::fetchTree(ref<Store> store) const
return {std::move(tree), FlakeRef(std::move(lockedInput), subdir)};
}
std::tuple<FlakeRef, std::string, OutputsSpec> parseFlakeRefWithFragmentAndOutputsSpec(
std::tuple<FlakeRef, std::string, ExtendedOutputsSpec> parseFlakeRefWithFragmentAndExtendedOutputsSpec(
const std::string & url,
const std::optional<Path> & baseDir,
bool allowMissing,
bool isFlake)
{
auto [prefix, outputsSpec] = parseOutputsSpec(url);
auto [flakeRef, fragment] = parseFlakeRefWithFragment(prefix, baseDir, allowMissing, isFlake);
return {std::move(flakeRef), fragment, outputsSpec};
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(url);
auto [flakeRef, fragment] = parseFlakeRefWithFragment(std::string { prefix }, baseDir, allowMissing, isFlake);
return {std::move(flakeRef), fragment, extendedOutputsSpec};
}
}

4
src/libexpr/flake/flakeref.hh
View file

@ -3,7 +3,7 @@
#include "types.hh"
#include "hash.hh"
#include "fetchers.hh"
#include "path-with-outputs.hh"
#include "outputs-spec.hh"
#include <variant>
@ -80,7 +80,7 @@ std::pair<FlakeRef, std::string> parseFlakeRefWithFragment(
std::optional<std::pair<FlakeRef, std::string>> maybeParseFlakeRefWithFragment(
const std::string & url, const std::optional<Path> & baseDir = {});
std::tuple<FlakeRef, std::string, OutputsSpec> parseFlakeRefWithFragmentAndOutputsSpec(
std::tuple<FlakeRef, std::string, ExtendedOutputsSpec> parseFlakeRefWithFragmentAndExtendedOutputsSpec(
const std::string & url,
const std::optional<Path> & baseDir = {},
bool allowMissing = false,

3
src/libexpr/local.mk
View file

@ -6,6 +6,7 @@ libexpr_DIR := $(d)
libexpr_SOURCES := \
$(wildcard $(d)/*.cc) \
$(wildcard $(d)/value/*.cc) \
$(wildcard $(d)/primops/*.cc) \
$(wildcard $(d)/flake/*.cc) \
$(d)/lexer-tab.cc \
@ -37,6 +38,8 @@ clean-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexe
$(eval $(call install-file-in, $(d)/nix-expr.pc, $(libdir)/pkgconfig, 0644))
$(foreach i, $(wildcard src/libexpr/value/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/value, 0644)))
$(foreach i, $(wildcard src/libexpr/flake/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/flake, 0644)))

380
src/libexpr/primops.cc
View file

@ -43,16 +43,32 @@ StringMap EvalState::realiseContext(const PathSet & context)
std::vector<DerivedPath::Built> drvs;
StringMap res;
for (auto & i : context) {
auto [ctx, outputName] = decodeContext(*store, i);
auto ctxS = store->printStorePath(ctx);
if (!store->isValidPath(ctx))
debugThrowLastTrace(InvalidPathError(store->printStorePath(ctx)));
if (!outputName.empty() && ctx.isDerivation()) {
drvs.push_back({ctx, {outputName}});
} else {
for (auto & c_ : context) {
auto ensureValid = [&](const StorePath & p) {
if (!store->isValidPath(p))
debugThrowLastTrace(InvalidPathError(store->printStorePath(p)));
};
auto c = NixStringContextElem::parse(*store, c_);
std::visit(overloaded {
[&](const NixStringContextElem::Built & b) {
drvs.push_back(DerivedPath::Built {
.drvPath = b.drvPath,
.outputs = OutputsSpec::Names { b.output },
});
ensureValid(b.drvPath);
},
[&](const NixStringContextElem::Opaque & o) {
auto ctxS = store->printStorePath(o.path);
res.insert_or_assign(ctxS, ctxS);
}
ensureValid(o.path);
},
[&](const NixStringContextElem::DrvDeep & d) {
/* Treat same as Opaque */
auto ctxS = store->printStorePath(d.drvPath);
res.insert_or_assign(ctxS, ctxS);
ensureValid(d.drvPath);
},
}, c.raw());
}
if (drvs.empty()) return {};
@ -68,16 +84,12 @@ StringMap EvalState::realiseContext(const PathSet & context)
store->buildPaths(buildReqs);
/* Get all the output paths corresponding to the placeholders we had */
for (auto & [drvPath, outputs] : drvs) {
const auto outputPaths = store->queryDerivationOutputMap(drvPath);
for (auto & outputName : outputs) {
auto outputPath = get(outputPaths, outputName);
if (!outputPath)
debugThrowLastTrace(Error("derivation '%s' does not have an output named '%s'",
store->printStorePath(drvPath), outputName));
for (auto & drv : drvs) {
auto outputs = resolveDerivedPath(*store, drv);
for (auto & [outputName, outputPath] : outputs) {
res.insert_or_assign(
downstreamPlaceholder(*store, drvPath, outputName),
store->printStorePath(*outputPath)
downstreamPlaceholder(*store, drv.drvPath, outputName),
store->printStorePath(outputPath)
);
}
}
@ -240,6 +252,7 @@ static RegisterPrimOp primop_scopedImport(RegisterPrimOp::Info {
static RegisterPrimOp primop_import({
.name = "import",
.args = {"path"},
// TODO turn "normal path values" into link below
.doc = R"(
Load, parse and return the Nix expression in the file *path*. If
*path* is a directory, the file ` default.nix ` in that directory
@ -253,7 +266,7 @@ static RegisterPrimOp primop_import({
>
> Unlike some languages, `import` is a regular function in Nix.
> Paths using the angle bracket syntax (e.g., `import` *\<foo\>*)
> are [normal path values](language-values.md).
> are normal [path values](@docroot@/language/values.md#type-path).
A Nix expression loaded by `import` must not contain any *free
variables* (identifiers that are not defined in the Nix expression
@ -337,26 +350,22 @@ void prim_exec(EvalState & state, const PosIdx pos, Value * * args, Value & v)
auto elems = args[0]->listElems();
auto count = args[0]->listSize();
if (count == 0)
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("at least one argument to 'exec' required"),
.errPos = state.positions[pos]
}));
state.error("at least one argument to 'exec' required").atPos(pos).debugThrow<EvalError>();
PathSet context;
auto program = state.coerceToString(pos, *elems[0], context, false, false,
"while evaluating the first element of the argument passed to builtins.exec").toOwned();
auto program = state.coerceToString(pos, *elems[0], context,
"while evaluating the first element of the argument passed to builtins.exec",
false, false).toOwned();
Strings commandArgs;
for (unsigned int i = 1; i < args[0]->listSize(); ++i) {
commandArgs.push_back(state.coerceToString(pos, *elems[i], context, false, false,
"while evaluating an element of the argument passed to builtins.exec").toOwned());
commandArgs.push_back(
state.coerceToString(pos, *elems[i], context,
"while evaluating an element of the argument passed to builtins.exec",
false, false).toOwned());
}
try {
auto _ = state.realiseContext(context); // FIXME: Handle CA derivations
} catch (InvalidPathError & e) {
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("cannot execute '%1%', since path '%2%' is not valid",
program, e.path),
.errPos = state.positions[pos]
}));
state.error("cannot execute '%1%', since path '%2%' is not valid", program, e.path).atPos(pos).debugThrow<EvalError>();
}
auto output = runProgram(program, true, commandArgs);
@ -585,6 +594,7 @@ struct CompareValues
state.error("cannot compare %s with %s; values of that type are incomparable", showType(*v1), showType(*v2)).debugThrow<EvalError>();
}
} catch (Error & e) {
if (!errorCtx.empty())
e.addTrace(nullptr, errorCtx);
throw;
}
@ -607,15 +617,7 @@ static Bindings::iterator getAttr(
{
Bindings::iterator value = attrSet->find(attrSym);
if (value == attrSet->end()) {
throw TypeError({
.msg = hintfmt("attribute '%s' missing %s", state.symbols[attrSym], normaltxt(errorCtx)),
.errPos = state.positions[attrSet->pos],
});
// TODO XXX
// Adding another trace for the function name to make it clear
// which call received wrong arguments.
//e.addTrace(state.positions[pos], hintfmt("while invoking '%s'", funcName));
//state.debugThrowLastTrace(e);
state.error("attribute '%s' missing", state.symbols[attrSym]).withTrace(noPos, errorCtx).debugThrow<TypeError>();
}
return value;
}
@ -788,8 +790,10 @@ static void prim_addErrorContext(EvalState & state, const PosIdx pos, Value * *
v = *args[1];
} catch (Error & e) {
PathSet context;
e.addTrace(nullptr, state.coerceToString(pos, *args[0], context,
"while evaluating the error message passed to builtins.addErrorContext").toOwned());
auto message = state.coerceToString(pos, *args[0], context,
"while evaluating the error message passed to builtins.addErrorContext",
false, false).toOwned();
e.addTrace(nullptr, message, true);
throw;
}
}
@ -993,6 +997,7 @@ static void prim_second(EvalState & state, const PosIdx pos, Value * * args, Val
* Derivations
*************************************************************/
static void derivationStrictInternal(EvalState & state, const std::string & name, Bindings * attrs, Value & v);
/* Construct (as a unobservable side effect) a Nix derivation
expression that performs the derivation described by the argument
@ -1003,32 +1008,68 @@ static void prim_second(EvalState & state, const PosIdx pos, Value * * args, Val
derivation. */
static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
using nlohmann::json;
state.forceAttrs(*args[0], pos, "while evaluating the argument passed to builtins.derivationStrict");
Bindings * attrs = args[0]->attrs;
/* Figure out the name first (for stack backtraces). */
Bindings::iterator attr = getAttr(state, state.sName, args[0]->attrs, "in the attrset passed as argument to builtins.derivationStrict");
Bindings::iterator nameAttr = getAttr(state, state.sName, attrs, "in the attrset passed as argument to builtins.derivationStrict");
std::string drvName;
const auto posDrvName = attr->pos;
try {
drvName = state.forceStringNoCtx(*attr->value, pos, "while evaluating the `name` attribute passed to builtins.derivationStrict");
drvName = state.forceStringNoCtx(*nameAttr->value, pos, "while evaluating the `name` attribute passed to builtins.derivationStrict");
} catch (Error & e) {
e.addTrace(state.positions[posDrvName], "while evaluating the derivation attribute 'name'");
e.addTrace(state.positions[nameAttr->pos], "while evaluating the derivation attribute 'name'");
throw;
}
try {
derivationStrictInternal(state, drvName, attrs, v);
} catch (Error & e) {
Pos pos = state.positions[nameAttr->pos];
/*
* Here we make two abuses of the error system
*
* 1. We print the location as a string to avoid a code snippet being
* printed. While the location of the name attribute is a good hint, the
* exact code there is irrelevant.
*
* 2. We mark this trace as a frame trace, meaning that we stop printing
* less important traces from now on. In particular, this prevents the
* display of the automatic "while calling builtins.derivationStrict"
* trace, which is of little use for the public we target here.
*
* Please keep in mind that error reporting is done on a best-effort
* basis in nix. There is no accurate location for a derivation, as it
* often results from the composition of several functions
* (derivationStrict, derivation, mkDerivation, mkPythonModule, etc.)
*/
e.addTrace(nullptr, hintfmt(
"while evaluating derivation '%s'\n"
" whose name attribute is located at %s",
drvName, pos), true);
throw;
}
}
static void derivationStrictInternal(EvalState & state, const std::string &
drvName, Bindings * attrs, Value & v)
{
/* Check whether attributes should be passed as a JSON file. */
using nlohmann::json;
std::optional<json> jsonObject;
attr = args[0]->attrs->find(state.sStructuredAttrs);
if (attr != args[0]->attrs->end() && state.forceBool(*attr->value, pos, "while evaluating the `__structuredAttrs` attribute passed to builtins.derivationStrict"))
auto attr = attrs->find(state.sStructuredAttrs);
if (attr != attrs->end() &&
state.forceBool(*attr->value, noPos,
"while evaluating the `__structuredAttrs` "
"attribute passed to builtins.derivationStrict"))
jsonObject = json::object();
/* Check whether null attributes should be ignored. */
bool ignoreNulls = false;
attr = args[0]->attrs->find(state.sIgnoreNulls);
if (attr != args[0]->attrs->end())
ignoreNulls = state.forceBool(*attr->value, pos, "while evaluating the `__ignoreNulls` attribute passed to builtins.derivationStrict");
attr = attrs->find(state.sIgnoreNulls);
if (attr != attrs->end())
ignoreNulls = state.forceBool(*attr->value, noPos, "while evaluating the `__ignoreNulls` attribute " "passed to builtins.derivationStrict");
/* Build the derivation expression by processing the attributes. */
Derivation drv;
@ -1045,7 +1086,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
StringSet outputs;
outputs.insert("out");
for (auto & i : args[0]->attrs->lexicographicOrder(state.symbols)) {
for (auto & i : attrs->lexicographicOrder(state.symbols)) {
if (i->name == state.sIgnoreNulls) continue;
const std::string & key = state.symbols[i->name];
vomit("processing attribute '%1%'", key);
@ -1056,7 +1097,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
else
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("invalid value '%s' for 'outputHashMode' attribute", s),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
};
@ -1066,7 +1107,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (outputs.find(j) != outputs.end())
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("duplicate derivation output '%1%'", j),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
/* !!! Check whether j is a valid attribute
name. */
@ -1076,34 +1117,35 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (j == "drv")
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("invalid derivation output name 'drv'" ),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
outputs.insert(j);
}
if (outputs.empty())
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("derivation cannot have an empty set of outputs"),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
};
try {
// This try-catch block adds context for most errors.
// Use this empty error context to signify that we defer to it.
const std::string_view context_below("");
if (ignoreNulls) {
state.forceValue(*i->value, pos);
state.forceValue(*i->value, noPos);
if (i->value->type() == nNull) continue;
}
if (i->name == state.sContentAddressed) {
contentAddressed = state.forceBool(*i->value, pos,
"while evaluating the `__contentAddressed` attribute passed to builtins.derivationStrict");
contentAddressed = state.forceBool(*i->value, noPos, context_below);
if (contentAddressed)
settings.requireExperimentalFeature(Xp::CaDerivations);
}
else if (i->name == state.sImpure) {
isImpure = state.forceBool(*i->value, pos,
"while evaluating the 'impure' attribute passed to builtins.derivationStrict");
isImpure = state.forceBool(*i->value, noPos, context_below);
if (isImpure)
settings.requireExperimentalFeature(Xp::ImpureDerivations);
}
@ -1111,11 +1153,11 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
/* The `args' attribute is special: it supplies the
command-line arguments to the builder. */
else if (i->name == state.sArgs) {
state.forceList(*i->value, pos,
"while evaluating the `args` attribute passed to builtins.derivationStrict");
state.forceList(*i->value, noPos, context_below);
for (auto elem : i->value->listItems()) {
auto s = state.coerceToString(posDrvName, *elem, context, true,
"while evaluating an element of the `args` argument passed to builtins.derivationStrict").toOwned();
auto s = state.coerceToString(noPos, *elem, context,
"while evaluating an element of the argument list",
true).toOwned();
drv.args.push_back(s);
}
}
@ -1128,29 +1170,29 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (i->name == state.sStructuredAttrs) continue;
(*jsonObject)[key] = printValueAsJSON(state, true, *i->value, pos, context);
(*jsonObject)[key] = printValueAsJSON(state, true, *i->value, noPos, context);
if (i->name == state.sBuilder)
drv.builder = state.forceString(*i->value, context, posDrvName, "while evaluating the `builder` attribute passed to builtins.derivationStrict");
drv.builder = state.forceString(*i->value, context, noPos, context_below);
else if (i->name == state.sSystem)
drv.platform = state.forceStringNoCtx(*i->value, posDrvName, "while evaluating the `system` attribute passed to builtins.derivationStrict");
drv.platform = state.forceStringNoCtx(*i->value, noPos, context_below);
else if (i->name == state.sOutputHash)
outputHash = state.forceStringNoCtx(*i->value, posDrvName, "while evaluating the `outputHash` attribute passed to builtins.derivationStrict");
outputHash = state.forceStringNoCtx(*i->value, noPos, context_below);
else if (i->name == state.sOutputHashAlgo)
outputHashAlgo = state.forceStringNoCtx(*i->value, posDrvName, "while evaluating the `outputHashAlgo` attribute passed to builtins.derivationStrict");
outputHashAlgo = state.forceStringNoCtx(*i->value, noPos, context_below);
else if (i->name == state.sOutputHashMode)
handleHashMode(state.forceStringNoCtx(*i->value, posDrvName, "while evaluating the `outputHashMode` attribute passed to builtins.derivationStrict"));
handleHashMode(state.forceStringNoCtx(*i->value, noPos, context_below));
else if (i->name == state.sOutputs) {
/* Require ‘outputs’ to be a list of strings. */
state.forceList(*i->value, posDrvName, "while evaluating the `outputs` attribute passed to builtins.derivationStrict");
state.forceList(*i->value, noPos, context_below);
Strings ss;
for (auto elem : i->value->listItems())
ss.emplace_back(state.forceStringNoCtx(*elem, posDrvName, "while evaluating an element of the `outputs` attribute passed to builtins.derivationStrict"));
ss.emplace_back(state.forceStringNoCtx(*elem, noPos, context_below));
handleOutputs(ss);
}
} else {
auto s = state.coerceToString(i->pos, *i->value, context, true, "while evaluating an attribute passed to builtins.derivationStrict").toOwned();
auto s = state.coerceToString(noPos, *i->value, context, context_below, true).toOwned();
drv.env.emplace(key, s);
if (i->name == state.sBuilder) drv.builder = std::move(s);
else if (i->name == state.sSystem) drv.platform = std::move(s);
@ -1164,8 +1206,8 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
}
} catch (Error & e) {
e.addTrace(nullptr,
hintfmt("while evaluating the attribute '%1%' of the derivation '%2%'", key, drvName),
e.addTrace(state.positions[i->pos],
hintfmt("while evaluating attribute '%1%' of derivation '%2%'", key, drvName),
true);
throw;
}
@ -1179,55 +1221,51 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
/* Everything in the context of the strings in the derivation
attributes should be added as dependencies of the resulting
derivation. */
for (auto & path : context) {
/* Paths marked with `=' denote that the path of a derivation
is explicitly passed to the builder. Since that allows the
builder to gain access to every path in the dependency
graph of the derivation (including all outputs), all paths
in the graph must be added to this derivation's list of
inputs to ensure that they are available when the builder
runs. */
if (path.at(0) == '=') {
for (auto & c_ : context) {
auto c = NixStringContextElem::parse(*state.store, c_);
std::visit(overloaded {
/* Since this allows the builder to gain access to every
path in the dependency graph of the derivation (including
all outputs), all paths in the graph must be added to
this derivation's list of inputs to ensure that they are
available when the builder runs. */
[&](const NixStringContextElem::DrvDeep & d) {
/* !!! This doesn't work if readOnlyMode is set. */
StorePathSet refs;
state.store->computeFSClosure(state.store->parseStorePath(std::string_view(path).substr(1)), refs);
state.store->computeFSClosure(d.drvPath, refs);
for (auto & j : refs) {
drv.inputSrcs.insert(j);
if (j.isDerivation())
drv.inputDrvs[j] = state.store->readDerivation(j).outputNames();
}
}
/* Handle derivation outputs of the form ‘!<name>!<path>’. */
else if (path.at(0) == '!') {
auto ctx = decodeContext(*state.store, path);
drv.inputDrvs[ctx.first].insert(ctx.second);
}
/* Otherwise it's a source file. */
else
drv.inputSrcs.insert(state.store->parseStorePath(path));
},
[&](const NixStringContextElem::Built & b) {
drv.inputDrvs[b.drvPath].insert(b.output);
},
[&](const NixStringContextElem::Opaque & o) {
drv.inputSrcs.insert(o.path);
},
}, c.raw());
}
/* Do we have all required attributes? */
if (drv.builder == "")
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("required attribute 'builder' missing"),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
if (drv.platform == "")
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("required attribute 'system' missing"),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
/* Check whether the derivation name is valid. */
if (isDerivation(drvName))
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("derivation names are not allowed to end in '%s'", drvExtension),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
if (outputHash) {
@ -1238,7 +1276,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (outputs.size() != 1 || *(outputs.begin()) != "out")
state.debugThrowLastTrace(Error({
.msg = hintfmt("multiple outputs are not supported in fixed-output derivations"),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
}));
auto h = newHashAllowEmpty(*outputHash, parseHashTypeOpt(outputHashAlgo));
@ -1259,7 +1297,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (contentAddressed && isImpure)
throw EvalError({
.msg = hintfmt("derivation cannot be both content-addressed and impure"),
.errPos = state.positions[posDrvName]
.errPos = state.positions[noPos]
});
auto ht = parseHashTypeOpt(outputHashAlgo).value_or(htSHA256);
@ -1303,7 +1341,7 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
if (!h)
throw AssertionError({
.msg = hintfmt("derivation produced no hash for output '%s'", i),
.errPos = state.positions[posDrvName],
.errPos = state.positions[noPos],
});
auto outPath = state.store->makeOutputPath(i, *h, drvName);
drv.env[i] = state.store->printStorePath(outPath);
@ -1336,11 +1374,12 @@ static void prim_derivationStrict(EvalState & state, const PosIdx pos, Value * *
drvHashes.lock()->insert_or_assign(drvPath, h);
}
auto attrs = state.buildBindings(1 + drv.outputs.size());
attrs.alloc(state.sDrvPath).mkString(drvPathS, {"=" + drvPathS});
auto result = state.buildBindings(1 + drv.outputs.size());
result.alloc(state.sDrvPath).mkString(drvPathS, {"=" + drvPathS});
for (auto & i : drv.outputs)
mkOutputString(state, attrs, drvPath, drv, i);
v.mkAttrs(attrs);
mkOutputString(state, result, drvPath, drv, i);
v.mkAttrs(result);
}
static RegisterPrimOp primop_derivationStrict(RegisterPrimOp::Info {
@ -1483,7 +1522,9 @@ static RegisterPrimOp primop_pathExists({
static void prim_baseNameOf(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
PathSet context;
v.mkString(baseNameOf(*state.coerceToString(pos, *args[0], context, false, false, "while evaluating the first argument passed to builtins.baseNameOf")), context);
v.mkString(baseNameOf(*state.coerceToString(pos, *args[0], context,
"while evaluating the first argument passed to builtins.baseNameOf",
false, false)), context);
}
static RegisterPrimOp primop_baseNameOf({
@ -1503,7 +1544,9 @@ static RegisterPrimOp primop_baseNameOf({
static void prim_dirOf(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
PathSet context;
auto path = state.coerceToString(pos, *args[0], context, false, false, "while evaluating the first argument passed to builtins.dirOf");
auto path = state.coerceToString(pos, *args[0], context,
"while evaluating the first argument passed to builtins.dirOf",
false, false);
auto dir = dirOf(*path);
if (args[0]->type() == nPath) v.mkPath(dir); else v.mkString(dir, context);
}
@ -1569,8 +1612,9 @@ static void prim_findFile(EvalState & state, const PosIdx pos, Value * * args, V
i = getAttr(state, state.sPath, v2->attrs, "in an element of the __nixPath");
PathSet context;
auto path = state.coerceToString(pos, *i->value, context, false, false,
"while evaluating the `path` attribute of an element of the list passed to builtins.findFile").toOwned();
auto path = state.coerceToString(pos, *i->value, context,
"while evaluating the `path` attribute of an element of the list passed to builtins.findFile",
false, false).toOwned();
try {
auto rewrites = state.realiseContext(context);
@ -1623,23 +1667,73 @@ static RegisterPrimOp primop_hashFile({
.fun = prim_hashFile,
});
/* Stringize a directory entry enum. Used by `readFileType' and `readDir'. */
static const char * dirEntTypeToString(unsigned char dtType)
{
/* Enum DT_(DIR|LNK|REG|UNKNOWN) */
switch(dtType) {
case DT_REG: return "regular"; break;
case DT_DIR: return "directory"; break;
case DT_LNK: return "symlink"; break;
default: return "unknown"; break;
}
return "unknown"; /* Unreachable */
}
static void prim_readFileType(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
auto path = realisePath(state, pos, *args[0]);
/* Retrieve the directory entry type and stringize it. */
v.mkString(dirEntTypeToString(getFileType(path)));
}
static RegisterPrimOp primop_readFileType({
.name = "__readFileType",
.args = {"p"},
.doc = R"(
Determine the directory entry type of a filesystem node, being
one of "directory", "regular", "symlink", or "unknown".
)",
.fun = prim_readFileType,
});
/* Read a directory (without . or ..) */
static void prim_readDir(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
auto path = realisePath(state, pos, *args[0]);
// Retrieve directory entries for all nodes in a directory.
// This is similar to `getFileType` but is optimized to reduce system calls
// on many systems.
DirEntries entries = readDirectory(path);
auto attrs = state.buildBindings(entries.size());
// If we hit unknown directory entry types we may need to fallback to
// using `getFileType` on some systems.
// In order to reduce system calls we make each lookup lazy by using
// `builtins.readFileType` application.
Value * readFileType = nullptr;
for (auto & ent : entries) {
if (ent.type == DT_UNKNOWN)
ent.type = getFileType(path + "/" + ent.name);
attrs.alloc(ent.name).mkString(
ent.type == DT_REG ? "regular" :
ent.type == DT_DIR ? "directory" :
ent.type == DT_LNK ? "symlink" :
"unknown");
auto & attr = attrs.alloc(ent.name);
if (ent.type == DT_UNKNOWN) {
// Some filesystems or operating systems may not be able to return
// detailed node info quickly in this case we produce a thunk to
// query the file type lazily.
auto epath = state.allocValue();
Path path2 = path + "/" + ent.name;
epath->mkString(path2);
if (!readFileType)
readFileType = &state.getBuiltin("readFileType");
attr.mkApp(readFileType, epath);
} else {
// This branch of the conditional is much more likely.
// Here we just stringize the directory entry type.
attr.mkString(dirEntTypeToString(ent.type));
}
}
v.mkAttrs(attrs);
@ -1872,8 +1966,7 @@ static RegisterPrimOp primop_toFile({
path. The file has suffix *name*. This file can be used as an
input to derivations. One application is to write builders
“inline”. For instance, the following Nix expression combines the
[Nix expression for GNU Hello](expression-syntax.md) and its
[build script](build-script.md) into one file:
Nix expression for GNU Hello and its build script into one file:
```nix
{ stdenv, fetchurl, perl }:
@ -1917,7 +2010,7 @@ static RegisterPrimOp primop_toFile({
```
Note that `${configFile}` is a
[string interpolation](language/values.md#type-string), so the result of the
[string interpolation](@docroot@/language/values.md#type-string), so the result of the
expression `configFile`
(i.e., a path like `/nix/store/m7p7jfny445k...-foo.conf`) will be
spliced into the resulting string.
@ -2614,14 +2707,9 @@ static void prim_zipAttrsWith(EvalState & state, const PosIdx pos, Value * * arg
for (unsigned int n = 0; n < listSize; ++n) {
Value * vElem = listElems[n];
try {
state.forceAttrs(*vElem, noPos, "while evaluating a value of the list passed as second argument to builtins.zipAttrsWith");
for (auto & attr : *vElem->attrs)
attrsSeen[attr.name].first++;
} catch (TypeError & e) {
e.addTrace(state.positions[pos], hintfmt("while invoking '%s'", "zipAttrsWith"));
state.debugThrowLastTrace(e);
}
}
auto attrs = state.buildBindings(attrsSeen.size());
@ -2807,7 +2895,7 @@ static RegisterPrimOp primop_map({
example,
```nix
map (x"foo" + x) [ "bar" "bla" "abc" ]
map (x: "foo" + x) [ "bar" "bla" "abc" ]
```
evaluates to `[ "foobar" "foobla" "fooabc" ]`.
@ -3005,13 +3093,13 @@ static void prim_genList(EvalState & state, const PosIdx pos, Value * * args, Va
auto len = state.forceInt(*args[1], pos, "while evaluating the second argument passed to builtins.genList");
if (len < 0)
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("cannot create list of size %1%", len),
.errPos = state.positions[pos]
}));
state.error("cannot create list of size %1%", len).debugThrow<EvalError>();
// More strict than striclty (!) necessary, but acceptable
// as evaluating map without accessing any values makes little sense.
state.forceFunction(*args[0], noPos, "while evaluating the first argument passed to builtins.genList");
state.mkList(v, len);
for (unsigned int n = 0; n < (unsigned int) len; ++n) {
auto arg = state.allocValue();
arg->mkInt(n);
@ -3059,6 +3147,8 @@ static void prim_sort(EvalState & state, const PosIdx pos, Value * * args, Value
auto comparator = [&](Value * a, Value * b) {
/* Optimization: if the comparator is lessThan, bypass
callFunction. */
/* TODO: (layus) this is absurd. An optimisation like this
should be outside the lambda creation */
if (args[0]->isPrimOp() && args[0]->primOp->fun == prim_lessThan)
return CompareValues(state, noPos, "while evaluating the ordering function passed to builtins.sort")(a, b);
@ -3219,12 +3309,7 @@ static void prim_concatMap(EvalState & state, const PosIdx pos, Value * * args,
for (unsigned int n = 0; n < nrLists; ++n) {
Value * vElem = args[1]->listElems()[n];
state.callFunction(*args[0], *vElem, lists[n], pos);
try {
state.forceList(lists[n], lists[n].determinePos(args[0]->determinePos(pos)), "while evaluating the return value of the function passed to buitlins.concatMap");
} catch (TypeError &e) {
e.addTrace(state.positions[pos], hintfmt("while invoking '%s'", "concatMap"));
state.debugThrowLastTrace(e);
}
len += lists[n].listSize();
}
@ -3404,7 +3489,7 @@ static void prim_lessThan(EvalState & state, const PosIdx pos, Value * * args, V
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
// pos is exact here, no need for a message.
CompareValues comp(state, pos, "");
CompareValues comp(state, noPos, "");
v.mkBool(comp(args[0], args[1]));
}
@ -3431,7 +3516,9 @@ static RegisterPrimOp primop_lessThan({
static void prim_toString(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
PathSet context;
auto s = state.coerceToString(pos, *args[0], context, true, false, "while evaluating the first argument passed to builtins.toString");
auto s = state.coerceToString(pos, *args[0], context,
"while evaluating the first argument passed to builtins.toString",
true, false);
v.mkString(*s, context);
}
@ -3783,21 +3870,18 @@ static void prim_replaceStrings(EvalState & state, const PosIdx pos, Value * * a
state.forceList(*args[0], pos, "while evaluating the first argument passed to builtins.replaceStrings");
state.forceList(*args[1], pos, "while evaluating the second argument passed to builtins.replaceStrings");
if (args[0]->listSize() != args[1]->listSize())
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("'from' and 'to' arguments to 'replaceStrings' have different lengths"),
.errPos = state.positions[pos]
}));
state.error("'from' and 'to' arguments passed to builtins.replaceStrings have different lengths").atPos(pos).debugThrow<EvalError>();
std::vector<std::string> from;
from.reserve(args[0]->listSize());
for (auto elem : args[0]->listItems())
from.emplace_back(state.forceString(*elem, pos, "while evaluating one of the strings to replace in builtins.replaceStrings"));
from.emplace_back(state.forceString(*elem, pos, "while evaluating one of the strings to replace passed to builtins.replaceStrings"));
std::vector<std::pair<std::string, PathSet>> to;
to.reserve(args[1]->listSize());
for (auto elem : args[1]->listItems()) {
PathSet ctx;
auto s = state.forceString(*elem, ctx, pos, "while evaluating one of the replacement strings of builtins.replaceStrings");
auto s = state.forceString(*elem, ctx, pos, "while evaluating one of the replacement strings passed to builtins.replaceStrings");
to.emplace_back(s, std::move(ctx));
}

53
src/libexpr/primops/context.cc
View file

@ -37,8 +37,15 @@ static void prim_unsafeDiscardOutputDependency(EvalState & state, const PosIdx p
auto s = state.coerceToString(pos, *args[0], context, "while evaluating the argument passed to builtins.unsafeDiscardOutputDependency");
PathSet context2;
for (auto & p : context)
context2.insert(p.at(0) == '=' ? std::string(p, 1) : p);
for (auto && p : context) {
auto c = NixStringContextElem::parse(*state.store, p);
if (auto * ptr = std::get_if<NixStringContextElem::DrvDeep>(&c)) {
context2.emplace(state.store->printStorePath(ptr->drvPath));
} else {
/* Can reuse original item */
context2.emplace(std::move(p));
}
}
v.mkString(*s, context2);
}
@ -74,34 +81,20 @@ static void prim_getContext(EvalState & state, const PosIdx pos, Value * * args,
};
PathSet context;
state.forceString(*args[0], context, pos, "while evaluating the argument passed to builtins.getContext");
auto contextInfos = std::map<Path, ContextInfo>();
auto contextInfos = std::map<StorePath, ContextInfo>();
for (const auto & p : context) {
Path drv;
std::string output;
const Path * path = &p;
if (p.at(0) == '=') {
drv = std::string(p, 1);
path = &drv;
} else if (p.at(0) == '!') {
NixStringContextElem ctx = decodeContext(*state.store, p);
drv = state.store->printStorePath(ctx.first);
output = ctx.second;
path = &drv;
}
auto isPath = drv.empty();
auto isAllOutputs = (!drv.empty()) && output.empty();
auto iter = contextInfos.find(*path);
if (iter == contextInfos.end()) {
contextInfos.emplace(*path, ContextInfo{isPath, isAllOutputs, output.empty() ? Strings{} : Strings{std::move(output)}});
} else {
if (isPath)
iter->second.path = true;
else if (isAllOutputs)
iter->second.allOutputs = true;
else
iter->second.outputs.emplace_back(std::move(output));
}
NixStringContextElem ctx = NixStringContextElem::parse(*state.store, p);
std::visit(overloaded {
[&](NixStringContextElem::DrvDeep & d) {
contextInfos[d.drvPath].allOutputs = true;
},
[&](NixStringContextElem::Built & b) {
contextInfos[b.drvPath].outputs.emplace_back(std::move(b.output));
},
[&](NixStringContextElem::Opaque & o) {
contextInfos[o.path].path = true;
},
}, ctx.raw());
}
auto attrs = state.buildBindings(contextInfos.size());
@ -120,7 +113,7 @@ static void prim_getContext(EvalState & state, const PosIdx pos, Value * * args,
for (const auto & [i, output] : enumerate(info.second.outputs))
(outputsVal.listElems()[i] = state.allocValue())->mkString(output);
}
attrs.alloc(info.first).mkAttrs(infoAttrs);
attrs.alloc(state.store->printStorePath(info.first)).mkAttrs(infoAttrs);
}
v.mkAttrs(attrs);

8
src/libexpr/primops/fetchMercurial.cc
View file

@ -22,7 +22,9 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
for (auto & attr : *args[0]->attrs) {
std::string_view n(state.symbols[attr.name]);
if (n == "url")
url = state.coerceToString(attr.pos, *attr.value, context, false, false, "while evaluating the `url` attribute passed to builtins.fetchMercurial").toOwned();
url = state.coerceToString(attr.pos, *attr.value, context,
"while evaluating the `url` attribute passed to builtins.fetchMercurial",
false, false).toOwned();
else if (n == "rev") {
// Ugly: unlike fetchGit, here the "rev" attribute can
// be both a revision or a branch/tag name.
@ -48,7 +50,9 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
});
} else
url = state.coerceToString(pos, *args[0], context, false, false, "while evaluating the first argument passed to builtins.fetchMercurial").toOwned();
url = state.coerceToString(pos, *args[0], context,
"while evaluating the first argument passed to builtins.fetchMercurial",
false, false).toOwned();
// FIXME: git externals probably can be used to bypass the URI
// whitelist. Ah well.

9
src/libexpr/primops/fetchTree.cc
View file

@ -125,7 +125,7 @@ static void fetchTree(
if (attr.name == state.sType) continue;
state.forceValue(*attr.value, attr.pos);
if (attr.value->type() == nPath || attr.value->type() == nString) {
auto s = state.coerceToString(attr.pos, *attr.value, context, false, false, "").toOwned();
auto s = state.coerceToString(attr.pos, *attr.value, context, "", false, false).toOwned();
attrs.emplace(state.symbols[attr.name],
state.symbols[attr.name] == "url"
? type == "git"
@ -151,7 +151,9 @@ static void fetchTree(
input = fetchers::Input::fromAttrs(std::move(attrs));
} else {
auto url = state.coerceToString(pos, *args[0], context, false, false, "while evaluating the first argument passed to the fetcher").toOwned();
auto url = state.coerceToString(pos, *args[0], context,
"while evaluating the first argument passed to the fetcher",
false, false).toOwned();
if (type == "git") {
fetchers::Attrs attrs;
@ -218,6 +220,9 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
} else
url = state.forceStringNoCtx(*args[0], pos, "while evaluating the url we should fetch");
if (who == "fetchTarball")
url = evalSettings.resolvePseudoUrl(*url);
state.checkURI(*url);
if (name == "")

1228
src/libexpr/tests/error_traces.cc
View file

File diff suppressed because it is too large Load diff

4
src/libexpr/tests/local.mk
View file

@ -6,7 +6,9 @@ libexpr-tests_DIR := $(d)
libexpr-tests_INSTALL_DIR :=
libexpr-tests_SOURCES := $(wildcard $(d)/*.cc)
libexpr-tests_SOURCES := \
$(wildcard $(d)/*.cc) \
$(wildcard $(d)/value/*.cc)
libexpr-tests_CXXFLAGS += -I src/libexpr -I src/libutil -I src/libstore -I src/libexpr/tests

72
src/libexpr/tests/value/context.cc Normal file
View file

@ -0,0 +1,72 @@
#include "value/context.hh"
#include "libexprtests.hh"
namespace nix {
// Testing of trivial expressions
struct NixStringContextElemTest : public LibExprTest {
const Store & store() const {
return *LibExprTest::store;
}
};
TEST_F(NixStringContextElemTest, empty_invalid) {
EXPECT_THROW(
NixStringContextElem::parse(store(), ""),
BadNixStringContextElem);
}
TEST_F(NixStringContextElemTest, single_bang_invalid) {
EXPECT_THROW(
NixStringContextElem::parse(store(), "!"),
BadNixStringContextElem);
}
TEST_F(NixStringContextElemTest, double_bang_invalid) {
EXPECT_THROW(
NixStringContextElem::parse(store(), "!!/"),
BadStorePath);
}
TEST_F(NixStringContextElemTest, eq_slash_invalid) {
EXPECT_THROW(
NixStringContextElem::parse(store(), "=/"),
BadStorePath);
}
TEST_F(NixStringContextElemTest, slash_invalid) {
EXPECT_THROW(
NixStringContextElem::parse(store(), "/"),
BadStorePath);
}
TEST_F(NixStringContextElemTest, opaque) {
std::string_view opaque = "/nix/store/g1w7hy3qg1w7hy3qg1w7hy3qg1w7hy3q-x";
auto elem = NixStringContextElem::parse(store(), opaque);
auto * p = std::get_if<NixStringContextElem::Opaque>(&elem);
ASSERT_TRUE(p);
ASSERT_EQ(p->path, store().parseStorePath(opaque));
ASSERT_EQ(elem.to_string(store()), opaque);
}
TEST_F(NixStringContextElemTest, drvDeep) {
std::string_view drvDeep = "=/nix/store/g1w7hy3qg1w7hy3qg1w7hy3qg1w7hy3q-x.drv";
auto elem = NixStringContextElem::parse(store(), drvDeep);
auto * p = std::get_if<NixStringContextElem::DrvDeep>(&elem);
ASSERT_TRUE(p);
ASSERT_EQ(p->drvPath, store().parseStorePath(drvDeep.substr(1)));
ASSERT_EQ(elem.to_string(store()), drvDeep);
}
TEST_F(NixStringContextElemTest, built) {
std::string_view built = "!foo!/nix/store/g1w7hy3qg1w7hy3qg1w7hy3qg1w7hy3q-x.drv";
auto elem = NixStringContextElem::parse(store(), built);
auto * p = std::get_if<NixStringContextElem::Built>(&elem);
ASSERT_TRUE(p);
ASSERT_EQ(p->output, "foo");
ASSERT_EQ(p->drvPath, store().parseStorePath(built.substr(5)));
ASSERT_EQ(elem.to_string(store()), built);
}
}

3
src/libexpr/value-to-json.cc
View file

@ -1,6 +1,7 @@
#include "value-to-json.hh"
#include "eval-inline.hh"
#include "util.hh"
#include "store-api.hh"
#include <cstdlib>
#include <iomanip>
@ -35,7 +36,7 @@ json printValueAsJSON(EvalState & state, bool strict,
case nPath:
if (copyToStore)
out = state.copyPathToStore(context, v.path);
out = state.store->printStorePath(state.copyPathToStore(context, v.path));
else
out = v.path;
break;

5
src/libexpr/value.hh
View file

@ -3,6 +3,7 @@
#include <cassert>
#include "symbol-table.hh"
#include "value/context.hh"
#if HAVE_BOEHMGC
#include <gc/gc_allocator.h>
@ -67,8 +68,6 @@ class XMLWriter;
typedef int64_t NixInt;
typedef double NixFloat;
typedef std::pair<StorePath, std::string> NixStringContextElem;
typedef std::vector<NixStringContextElem> NixStringContext;
/* External values must descend from ExternalValueBase, so that
* type-agnostic nix functions (e.g. showType) can be implemented
@ -90,7 +89,7 @@ class ExternalValueBase
/* Coerce the value to a string. Defaults to uncoercable, i.e. throws an
* error.
*/
virtual std::string coerceToString(const Pos & pos, PathSet & context, bool copyMore, bool copyToStore, std::string_view errorCtx) 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,
* i.e. always false.

67
src/libexpr/value/context.cc Normal file
View file

@ -0,0 +1,67 @@
#include "value/context.hh"
#include "store-api.hh"
#include <optional>
namespace nix {
NixStringContextElem NixStringContextElem::parse(const Store & store, std::string_view s0)
{
std::string_view s = s0;
if (s.size() == 0) {
throw BadNixStringContextElem(s0,
"String context element should never be an empty string");
}
switch (s.at(0)) {
case '!': {
s = s.substr(1); // advance string to parse after first !
size_t index = s.find("!");
// This makes index + 1 safe. Index can be the length (one after index
// of last character), so given any valid character index --- a
// successful find --- we can add one.
if (index == std::string_view::npos) {
throw BadNixStringContextElem(s0,
"String content element beginning with '!' should have a second '!'");
}
return NixStringContextElem::Built {
.drvPath = store.parseStorePath(s.substr(index + 1)),
.output = std::string(s.substr(0, index)),
};
}
case '=': {
return NixStringContextElem::DrvDeep {
.drvPath = store.parseStorePath(s.substr(1)),
};
}
default: {
return NixStringContextElem::Opaque {
.path = store.parseStorePath(s),
};
}
}
}
std::string NixStringContextElem::to_string(const Store & store) const {
return std::visit(overloaded {
[&](const NixStringContextElem::Built & b) {
std::string res;
res += '!';
res += b.output;
res += '!';
res += store.printStorePath(b.drvPath);
return res;
},
[&](const NixStringContextElem::DrvDeep & d) {
std::string res;
res += '=';
res += store.printStorePath(d.drvPath);
return res;
},
[&](const NixStringContextElem::Opaque & o) {
return store.printStorePath(o.path);
},
}, raw());
}
}

90
src/libexpr/value/context.hh Normal file
View file

@ -0,0 +1,90 @@
#pragma once
#include "util.hh"
#include "path.hh"
#include <optional>
#include <nlohmann/json_fwd.hpp>
namespace nix {
class BadNixStringContextElem : public Error
{
public:
std::string_view raw;
template<typename... Args>
BadNixStringContextElem(std::string_view raw_, const Args & ... args)
: Error("")
{
raw = raw_;
auto hf = hintfmt(args...);
err.msg = hintfmt("Bad String Context element: %1%: %2%", normaltxt(hf.str()), raw);
}
};
class Store;
/* Plain opaque path to some store object.
Encoded as just the path: ‘<path>’.
*/
struct NixStringContextElem_Opaque {
StorePath path;
};
/* 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
root derivation).
Encoded in the form ‘=<drvPath>’.
*/
struct NixStringContextElem_DrvDeep {
StorePath drvPath;
};
/* Derivation output.
Encoded in the form ‘!<output>!<drvPath>’.
*/
struct NixStringContextElem_Built {
StorePath drvPath;
std::string output;
};
using _NixStringContextElem_Raw = std::variant<
NixStringContextElem_Opaque,
NixStringContextElem_DrvDeep,
NixStringContextElem_Built
>;
struct NixStringContextElem : _NixStringContextElem_Raw {
using Raw = _NixStringContextElem_Raw;
using Raw::Raw;
using Opaque = NixStringContextElem_Opaque;
using DrvDeep = NixStringContextElem_DrvDeep;
using Built = NixStringContextElem_Built;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
inline Raw & raw() {
return static_cast<Raw &>(*this);
}
/* Decode a context string, one of:
- ‘<path>’
- ‘=<path>’
- ‘!<name>!<path>’
*/
static NixStringContextElem parse(const Store & store, std::string_view s);
std::string to_string(const Store & store) const;
};
typedef std::vector<NixStringContextElem> NixStringContext;
}

1
src/libmain/shared.cc
View file

@ -363,6 +363,7 @@ void printVersion(const std::string & programName)
<< "\n";
std::cout << "Store directory: " << settings.nixStore << "\n";
std::cout << "State directory: " << settings.nixStateDir << "\n";
std::cout << "Data directory: " << settings.nixDataDir << "\n";
}
throw Exit();
}

1
src/libmain/shared.hh
View file

@ -39,7 +39,6 @@ void printVersion(const std::string & programName);
void printGCWarning();
class Store;
struct StorePathWithOutputs;
void printMissing(
ref<Store> store,

17
src/libstore/binary-cache-store.cc
View file

@ -502,22 +502,9 @@ void BinaryCacheStore::addSignatures(const StorePath & storePath, const StringSe
writeNarInfo(narInfo);
}
std::optional<std::string> BinaryCacheStore::getBuildLog(const StorePath & path)
std::optional<std::string> BinaryCacheStore::getBuildLogExact(const StorePath & path)
{
auto drvPath = path;
if (!path.isDerivation()) {
try {
auto info = queryPathInfo(path);
// FIXME: add a "Log" field to .narinfo
if (!info->deriver) return std::nullopt;
drvPath = *info->deriver;
} catch (InvalidPath &) {
return std::nullopt;
}
}
auto logPath = "log/" + std::string(baseNameOf(printStorePath(drvPath)));
auto logPath = "log/" + std::string(baseNameOf(printStorePath(path)));
debug("fetching build log from binary cache '%s/%s'", getUri(), logPath);

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

@ -129,7 +129,7 @@ public:
void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
std::optional<std::string> getBuildLog(const StorePath & path) override;
std::optional<std::string> getBuildLogExact(const StorePath & path) override;
void addBuildLog(const StorePath & drvPath, std::string_view log) override;

51
src/libstore/build/derivation-goal.cc
View file

@ -63,7 +63,7 @@
namespace nix {
DerivationGoal::DerivationGoal(const StorePath & drvPath,
const StringSet & wantedOutputs, Worker & worker, BuildMode buildMode)
const OutputsSpec & wantedOutputs, Worker & worker, BuildMode buildMode)
: Goal(worker, DerivedPath::Built { .drvPath = drvPath, .outputs = wantedOutputs })
, useDerivation(true)
, drvPath(drvPath)
@ -82,7 +82,7 @@ DerivationGoal::DerivationGoal(const StorePath & drvPath,
DerivationGoal::DerivationGoal(const StorePath & drvPath, const BasicDerivation & drv,
const StringSet & wantedOutputs, Worker & worker, BuildMode buildMode)
const OutputsSpec & wantedOutputs, Worker & worker, BuildMode buildMode)
: Goal(worker, DerivedPath::Built { .drvPath = drvPath, .outputs = wantedOutputs })
, useDerivation(false)
, drvPath(drvPath)
@ -142,18 +142,12 @@ void DerivationGoal::work()
(this->*state)();
}
void DerivationGoal::addWantedOutputs(const StringSet & outputs)
void DerivationGoal::addWantedOutputs(const OutputsSpec & outputs)
{
/* If we already want all outputs, there is nothing to do. */
if (wantedOutputs.empty()) return;
if (outputs.empty()) {
wantedOutputs.clear();
needRestart = true;
} else
for (auto & i : outputs)
if (wantedOutputs.insert(i).second)
auto newWanted = wantedOutputs.union_(outputs);
if (!newWanted.isSubsetOf(wantedOutputs))
needRestart = true;
wantedOutputs = newWanted;
}
@ -390,7 +384,7 @@ void DerivationGoal::repairClosure()
auto outputs = queryDerivationOutputMap();
StorePathSet outputClosure;
for (auto & i : outputs) {
if (!wantOutput(i.first, wantedOutputs)) continue;
if (!wantedOutputs.contains(i.first)) continue;
worker.store.computeFSClosure(i.second, outputClosure);
}
@ -422,7 +416,7 @@ void DerivationGoal::repairClosure()
if (drvPath2 == outputsToDrv.end())
addWaitee(upcast_goal(worker.makePathSubstitutionGoal(i, Repair)));
else
addWaitee(worker.makeDerivationGoal(drvPath2->second, StringSet(), bmRepair));
addWaitee(worker.makeDerivationGoal(drvPath2->second, OutputsSpec::All(), bmRepair));
}
if (waitees.empty()) {
@ -544,7 +538,8 @@ void DerivationGoal::inputsRealised()
However, the impure derivations feature still relies on this
fragile way of doing things, because its builds do not have
a representation in the store, which is a usability problem
in itself */
in itself. When implementing this logic entirely with lookups
make sure that they're cached. */
if (auto outPath = get(inputDrvOutputs, { depDrvPath, j })) {
worker.store.computeFSClosure(*outPath, inputPaths);
}
@ -990,10 +985,15 @@ void DerivationGoal::resolvedFinished()
StorePathSet outputPaths;
// `wantedOutputs` might be empty, which means “all the outputs”
auto realWantedOutputs = wantedOutputs;
if (realWantedOutputs.empty())
realWantedOutputs = resolvedDrv.outputNames();
// `wantedOutputs` might merely indicate “all the outputs”
auto realWantedOutputs = std::visit(overloaded {
[&](const OutputsSpec::All &) {
return resolvedDrv.outputNames();
},
[&](const OutputsSpec::Names & names) {
return static_cast<std::set<std::string>>(names);
},
}, wantedOutputs.raw());
for (auto & wantedOutput : realWantedOutputs) {
auto initialOutput = get(initialOutputs, wantedOutput);
@ -1321,7 +1321,14 @@ std::pair<bool, DrvOutputs> DerivationGoal::checkPathValidity()
if (!drv->type().isPure()) return { false, {} };
bool checkHash = buildMode == bmRepair;
auto wantedOutputsLeft = wantedOutputs;
auto wantedOutputsLeft = std::visit(overloaded {
[&](const OutputsSpec::All &) {
return StringSet {};
},
[&](const OutputsSpec::Names & names) {
return static_cast<StringSet>(names);
},
}, wantedOutputs.raw());
DrvOutputs validOutputs;
for (auto & i : queryPartialDerivationOutputMap()) {
@ -1330,7 +1337,7 @@ std::pair<bool, DrvOutputs> DerivationGoal::checkPathValidity()
// this is an invalid output, gets catched with (!wantedOutputsLeft.empty())
continue;
auto & info = *initialOutput;
info.wanted = wantOutput(i.first, wantedOutputs);
info.wanted = wantedOutputs.contains(i.first);
if (info.wanted)
wantedOutputsLeft.erase(i.first);
if (i.second) {
@ -1368,7 +1375,7 @@ std::pair<bool, DrvOutputs> DerivationGoal::checkPathValidity()
validOutputs.emplace(drvOutput, Realisation { drvOutput, info.known->path });
}
// If we requested all the outputs via the empty set, we are always fine.
// If we requested all the outputs, we are always fine.
// If we requested specific elements, the loop above removes all the valid
// ones, so any that are left must be invalid.
if (!wantedOutputsLeft.empty())

9
src/libstore/build/derivation-goal.hh
View file

@ -2,6 +2,7 @@
#include "parsed-derivations.hh"
#include "lock.hh"
#include "outputs-spec.hh"
#include "store-api.hh"
#include "pathlocks.hh"
#include "goal.hh"
@ -55,7 +56,7 @@ struct DerivationGoal : public Goal
/* The specific outputs that we need to build. Empty means all of
them. */
StringSet wantedOutputs;
OutputsSpec wantedOutputs;
/* Mapping from input derivations + output names to actual store
paths. This is filled in by waiteeDone() as each dependency
@ -128,10 +129,10 @@ struct DerivationGoal : public Goal
std::string machineName;
DerivationGoal(const StorePath & drvPath,
const StringSet & wantedOutputs, Worker & worker,
const OutputsSpec & wantedOutputs, Worker & worker,
BuildMode buildMode = bmNormal);
DerivationGoal(const StorePath & drvPath, const BasicDerivation & drv,
const StringSet & wantedOutputs, Worker & worker,
const OutputsSpec & wantedOutputs, Worker & worker,
BuildMode buildMode = bmNormal);
virtual ~DerivationGoal();
@ -142,7 +143,7 @@ struct DerivationGoal : public Goal
void work() override;
/* Add wanted outputs to an already existing derivation goal. */
void addWantedOutputs(const StringSet & outputs);
void addWantedOutputs(const OutputsSpec & outputs);
/* The states. */
void getDerivation();

10
src/libstore/build/entry-points.cc
View file

@ -80,7 +80,7 @@ BuildResult Store::buildDerivation(const StorePath & drvPath, const BasicDerivat
BuildMode buildMode)
{
Worker worker(*this, *this);
auto goal = worker.makeBasicDerivationGoal(drvPath, drv, {}, buildMode);
auto goal = worker.makeBasicDerivationGoal(drvPath, drv, OutputsSpec::All {}, buildMode);
try {
worker.run(Goals{goal});
@ -89,7 +89,10 @@ BuildResult Store::buildDerivation(const StorePath & drvPath, const BasicDerivat
return BuildResult {
.status = BuildResult::MiscFailure,
.errorMsg = e.msg(),
.path = DerivedPath::Built { .drvPath = drvPath },
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = OutputsSpec::All { },
},
};
};
}
@ -130,7 +133,8 @@ void LocalStore::repairPath(const StorePath & path)
auto info = queryPathInfo(path);
if (info->deriver && isValidPath(*info->deriver)) {
goals.clear();
goals.insert(worker.makeDerivationGoal(*info->deriver, StringSet(), bmRepair));
// FIXME: Should just build the specific output we need.
goals.insert(worker.makeDerivationGoal(*info->deriver, OutputsSpec::All { }, bmRepair));
worker.run(goals);
} else
throw Error(worker.exitStatus(), "cannot repair path '%s'", printStorePath(path));

18
src/libstore/build/local-derivation-goal.cc
View file

@ -1459,7 +1459,7 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
unknown, downloadSize, narSize);
}
virtual std::optional<std::string> getBuildLog(const StorePath & path) override
virtual std::optional<std::string> getBuildLogExact(const StorePath & path) override
{ return std::nullopt; }
virtual void addBuildLog(const StorePath & path, std::string_view log) override
@ -2050,10 +2050,14 @@ void LocalDerivationGoal::runChild()
sandboxProfile += "(deny default (with no-log))\n";
}
sandboxProfile += "(import \"sandbox-defaults.sb\")\n";
sandboxProfile +=
#include "sandbox-defaults.sb"
;
if (!derivationType.isSandboxed())
sandboxProfile += "(import \"sandbox-network.sb\")\n";
sandboxProfile +=
#include "sandbox-network.sb"
;
/* Add the output paths we'll use at build-time to the chroot */
sandboxProfile += "(allow file-read* file-write* process-exec\n";
@ -2096,7 +2100,9 @@ void LocalDerivationGoal::runChild()
sandboxProfile += additionalSandboxProfile;
} else
sandboxProfile += "(import \"sandbox-minimal.sb\")\n";
sandboxProfile +=
#include "sandbox-minimal.sb"
;
debug("Generated sandbox profile:");
debug(sandboxProfile);
@ -2121,8 +2127,6 @@ void LocalDerivationGoal::runChild()
args.push_back(sandboxFile);
args.push_back("-D");
args.push_back("_GLOBAL_TMP_DIR=" + globalTmpDir);
args.push_back("-D");
args.push_back("IMPORT_DIR=" + settings.nixDataDir + "/nix/sandbox/");
if (allowLocalNetworking) {
args.push_back("-D");
args.push_back(std::string("_ALLOW_LOCAL_NETWORKING=1"));
@ -2748,7 +2752,7 @@ DrvOutputs LocalDerivationGoal::registerOutputs()
signRealisation(thisRealisation);
worker.store.registerDrvOutput(thisRealisation);
}
if (wantOutput(outputName, wantedOutputs))
if (wantedOutputs.contains(outputName))
builtOutputs.emplace(thisRealisation.id, thisRealisation);
}

4
src/libstore/sandbox-defaults.sb → src/libstore/build/sandbox-defaults.sb
View file

@ -1,3 +1,5 @@
R""(
(define TMPDIR (param "_GLOBAL_TMP_DIR"))
(deny default)
@ -104,3 +106,5 @@
(subpath "/System/Library/Apple/usr/libexec/oah")
(subpath "/System/Library/LaunchDaemons/com.apple.oahd.plist")
(subpath "/Library/Apple/System/Library/LaunchDaemons/com.apple.oahd.plist"))
)""

4
src/libstore/sandbox-minimal.sb → src/libstore/build/sandbox-minimal.sb
View file

@ -1,5 +1,9 @@
R""(
(allow default)
; Disallow creating setuid/setgid binaries, since that
; would allow breaking build user isolation.
(deny file-write-setugid)
)""

4
src/libstore/sandbox-network.sb → src/libstore/build/sandbox-network.sb
View file

@ -1,3 +1,5 @@
R""(
; Allow local and remote network traffic.
(allow network* (local ip) (remote ip))
@ -18,3 +20,5 @@
; Allow access to trustd.
(allow mach-lookup (global-name "com.apple.trustd"))
(allow mach-lookup (global-name "com.apple.trustd.agent"))
)""

6
src/libstore/build/worker.cc
View file

@ -42,7 +42,7 @@ Worker::~Worker()
std::shared_ptr<DerivationGoal> Worker::makeDerivationGoalCommon(
const StorePath & drvPath,
const StringSet & wantedOutputs,
const OutputsSpec & wantedOutputs,
std::function<std::shared_ptr<DerivationGoal>()> mkDrvGoal)
{
std::weak_ptr<DerivationGoal> & goal_weak = derivationGoals[drvPath];
@ -59,7 +59,7 @@ std::shared_ptr<DerivationGoal> Worker::makeDerivationGoalCommon(
std::shared_ptr<DerivationGoal> Worker::makeDerivationGoal(const StorePath & drvPath,
const StringSet & wantedOutputs, BuildMode buildMode)
const OutputsSpec & wantedOutputs, BuildMode buildMode)
{
return makeDerivationGoalCommon(drvPath, wantedOutputs, [&]() -> std::shared_ptr<DerivationGoal> {
return !dynamic_cast<LocalStore *>(&store)
@ -70,7 +70,7 @@ std::shared_ptr<DerivationGoal> Worker::makeDerivationGoal(const StorePath & drv
std::shared_ptr<DerivationGoal> Worker::makeBasicDerivationGoal(const StorePath & drvPath,
const BasicDerivation & drv, const StringSet & wantedOutputs, BuildMode buildMode)
const BasicDerivation & drv, const OutputsSpec & wantedOutputs, BuildMode buildMode)
{
return makeDerivationGoalCommon(drvPath, wantedOutputs, [&]() -> std::shared_ptr<DerivationGoal> {
return !dynamic_cast<LocalStore *>(&store)

6
src/libstore/build/worker.hh
View file

@ -140,15 +140,15 @@ public:
/* derivation goal */
private:
std::shared_ptr<DerivationGoal> makeDerivationGoalCommon(
const StorePath & drvPath, const StringSet & wantedOutputs,
const StorePath & drvPath, const OutputsSpec & wantedOutputs,
std::function<std::shared_ptr<DerivationGoal>()> mkDrvGoal);
public:
std::shared_ptr<DerivationGoal> makeDerivationGoal(
const StorePath & drvPath,
const StringSet & wantedOutputs, BuildMode buildMode = bmNormal);
const OutputsSpec & wantedOutputs, BuildMode buildMode = bmNormal);
std::shared_ptr<DerivationGoal> makeBasicDerivationGoal(
const StorePath & drvPath, const BasicDerivation & drv,
const StringSet & wantedOutputs, BuildMode buildMode = bmNormal);
const OutputsSpec & wantedOutputs, BuildMode buildMode = bmNormal);
/* substitution goal */
std::shared_ptr<PathSubstitutionGoal> makePathSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);

3
src/libstore/daemon.cc
View file

@ -222,7 +222,8 @@ struct ClientSettings
else if (!hasSuffix(s, "/") && trusted.count(s + "/"))
subs.push_back(s + "/");
else
warn("ignoring untrusted substituter '%s'", s);
warn("ignoring untrusted substituter '%s', you are not a trusted user.\n"
"Run `man nix.conf` for more information on the `substituters` configuration option.", s);
res = subs;
return true;
};

6
src/libstore/derivations.cc
View file

@ -688,12 +688,6 @@ std::map<std::string, Hash> staticOutputHashes(Store & store, const Derivation &
}
bool wantOutput(const std::string & output, const std::set<std::string> & wanted)
{
return wanted.empty() || wanted.find(output) != wanted.end();
}
static DerivationOutput readDerivationOutput(Source & in, const Store & store)
{
const auto pathS = readString(in);

3
src/libstore/derivations.hh
View file

@ -13,6 +13,7 @@
namespace nix {
class Store;
/* Abstract syntax of derivations. */
@ -294,8 +295,6 @@ typedef std::map<StorePath, DrvHash> DrvHashes;
// FIXME: global, though at least thread-safe.
extern Sync<DrvHashes> drvHashes;
bool wantOutput(const std::string & output, const std::set<std::string> & wanted);
struct Source;
struct Sink;

25
src/libstore/derived-path.cc
View file

@ -19,11 +19,11 @@ nlohmann::json DerivedPath::Built::toJSON(ref<Store> store) const {
res["drvPath"] = store->printStorePath(drvPath);
// Fallback for the input-addressed derivation case: We expect to always be
// able to print the output paths, so let’s do it
const auto knownOutputs = store->queryPartialDerivationOutputMap(drvPath);
for (const auto & output : outputs) {
auto knownOutput = get(knownOutputs, output);
if (knownOutput && *knownOutput)
res["outputs"][output] = store->printStorePath(**knownOutput);
const auto outputMap = store->queryPartialDerivationOutputMap(drvPath);
for (const auto & [output, outputPathOpt] : outputMap) {
if (!outputs.contains(output)) continue;
if (outputPathOpt)
res["outputs"][output] = store->printStorePath(*outputPathOpt);
else
res["outputs"][output] = nullptr;
}
@ -63,7 +63,7 @@ std::string DerivedPath::Built::to_string(const Store & store) const
{
return store.printStorePath(drvPath)
+ "!"
+ (outputs.empty() ? std::string { "*" } : concatStringsSep(",", outputs));
+ outputs.to_string();
}
std::string DerivedPath::to_string(const Store & store) const
@ -81,15 +81,10 @@ DerivedPath::Opaque DerivedPath::Opaque::parse(const Store & store, std::string_
DerivedPath::Built DerivedPath::Built::parse(const Store & store, std::string_view drvS, std::string_view outputsS)
{
auto drvPath = store.parseStorePath(drvS);
std::set<std::string> outputs;
if (outputsS != "*") {
outputs = tokenizeString<std::set<std::string>>(outputsS, ",");
if (outputs.empty())
throw Error(
"Explicit list of wanted outputs '%s' must not be empty. Consider using '*' as a wildcard meaning all outputs if no output in particular is wanted.", outputsS);
}
return {drvPath, outputs};
return {
.drvPath = store.parseStorePath(drvS),
.outputs = OutputsSpec::parse(outputsS),
};
}
DerivedPath DerivedPath::parse(const Store & store, std::string_view s)

3
src/libstore/derived-path.hh
View file

@ -3,6 +3,7 @@
#include "util.hh"
#include "path.hh"
#include "realisation.hh"
#include "outputs-spec.hh"
#include <optional>
@ -44,7 +45,7 @@ struct DerivedPathOpaque {
*/
struct DerivedPathBuilt {
StorePath drvPath;
std::set<std::string> outputs;
OutputsSpec outputs;
std::string to_string(const Store & store) const;
static DerivedPathBuilt parse(const Store & store, std::string_view, std::string_view);

60
src/libstore/gc.cc
View file

@ -77,12 +77,12 @@ Path LocalFSStore::addPermRoot(const StorePath & storePath, const Path & _gcRoot
}
void LocalStore::addTempRoot(const StorePath & path)
void LocalStore::createTempRootsFile()
{
auto state(_state.lock());
auto fdTempRoots(_fdTempRoots.lock());
/* Create the temporary roots file for this process. */
if (!state->fdTempRoots) {
if (*fdTempRoots) return;
while (1) {
if (pathExists(fnTempRoots))
@ -90,47 +90,60 @@ void LocalStore::addTempRoot(const StorePath & path)
processes with the same pid. */
unlink(fnTempRoots.c_str());
state->fdTempRoots = openLockFile(fnTempRoots, true);
*fdTempRoots = openLockFile(fnTempRoots, true);
debug("acquiring write lock on '%s'", fnTempRoots);
lockFile(state->fdTempRoots.get(), ltWrite, true);
lockFile(fdTempRoots->get(), ltWrite, true);
/* Check whether the garbage collector didn't get in our
way. */
struct stat st;
if (fstat(state->fdTempRoots.get(), &st) == -1)
if (fstat(fdTempRoots->get(), &st) == -1)
throw SysError("statting '%1%'", fnTempRoots);
if (st.st_size == 0) break;
/* The garbage collector deleted this file before we could
get a lock. (It won't delete the file after we get a
lock.) Try again. */
/* The garbage collector deleted this file before we could get
a lock. (It won't delete the file after we get a lock.)
Try again. */
}
}
void LocalStore::addTempRoot(const StorePath & path)
{
createTempRootsFile();
/* Open/create the global GC lock file. */
{
auto fdGCLock(_fdGCLock.lock());
if (!*fdGCLock)
*fdGCLock = openGCLock();
}
if (!state->fdGCLock)
state->fdGCLock = openGCLock();
restart:
FdLock gcLock(state->fdGCLock.get(), ltRead, false, "");
/* Try to acquire a shared global GC lock (non-blocking). This
only succeeds if the garbage collector is not currently
running. */
FdLock gcLock(_fdGCLock.lock()->get(), ltRead, false, "");
if (!gcLock.acquired) {
/* We couldn't get a shared global GC lock, so the garbage
collector is running. So we have to connect to the garbage
collector and inform it about our root. */
if (!state->fdRootsSocket) {
auto fdRootsSocket(_fdRootsSocket.lock());
if (!*fdRootsSocket) {
auto socketPath = stateDir.get() + gcSocketPath;
debug("connecting to '%s'", socketPath);
state->fdRootsSocket = createUnixDomainSocket();
*fdRootsSocket = createUnixDomainSocket();
try {
nix::connect(state->fdRootsSocket.get(), socketPath);
nix::connect(fdRootsSocket->get(), socketPath);
} catch (SysError & e) {
/* The garbage collector may have exited, so we need to
restart. */
if (e.errNo == ECONNREFUSED) {
debug("GC socket connection refused");
state->fdRootsSocket.close();
fdRootsSocket->close();
goto restart;
}
throw;
@ -139,9 +152,9 @@ void LocalStore::addTempRoot(const StorePath & path)
try {
debug("sending GC root '%s'", printStorePath(path));
writeFull(state->fdRootsSocket.get(), printStorePath(path) + "\n", false);
writeFull(fdRootsSocket->get(), printStorePath(path) + "\n", false);
char c;
readFull(state->fdRootsSocket.get(), &c, 1);
readFull(fdRootsSocket->get(), &c, 1);
assert(c == '1');
debug("got ack for GC root '%s'", printStorePath(path));
} catch (SysError & e) {
@ -149,20 +162,21 @@ void LocalStore::addTempRoot(const StorePath & path)
restart. */
if (e.errNo == EPIPE || e.errNo == ECONNRESET) {
debug("GC socket disconnected");
state->fdRootsSocket.close();
fdRootsSocket->close();
goto restart;
}
throw;
} catch (EndOfFile & e) {
debug("GC socket disconnected");
state->fdRootsSocket.close();
fdRootsSocket->close();
goto restart;
}
}
/* Append the store path to the temporary roots file. */
/* Record the store path in the temporary roots file so it will be
seen by a future run of the garbage collector. */
auto s = printStorePath(path) + '\0';
writeFull(state->fdTempRoots.get(), s);
writeFull(_fdTempRoots.lock()->get(), s);
}

25
src/libstore/globals.hh
View file

@ -570,11 +570,15 @@ public:
{"cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="},
"trusted-public-keys",
R"(
A whitespace-separated list of public keys. When paths are copied
from another Nix store (such as a binary cache), they must be
signed with one of these keys. For example:
`cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs=`.
A whitespace-separated list of public keys.
At least one of the following condition must be met
for Nix to accept copying a store object from another
Nix store (such as a substituter):
- the store object has been signed using a key in the trusted keys list
- the [`require-sigs`](#conf-require-sigs) option has been set to `false`
- the store object is [output-addressed](@docroot@/glossary.md#gloss-output-addressed-store-object)
)",
{"binary-cache-public-keys"}};
@ -670,13 +674,14 @@ public:
independently. Lower value means higher priority.
The default is `https://cache.nixos.org`, with a Priority of 40.
Nix will copy a store path from a remote store only if one
of the following is true:
At least one of the following conditions must be met for Nix to use
a substituter:
- the store object is signed by one of the [`trusted-public-keys`](#conf-trusted-public-keys)
- the substituter is in the [`trusted-substituters`](#conf-trusted-substituters) list
- the [`require-sigs`](#conf-require-sigs) option has been set to `false`
- the store object is [output-addressed](glossary.md#gloss-output-addressed-store-object)
- the user calling Nix is in the [`trusted-users`](#conf-trusted-users) list
In addition, each store path should be trusted as described
in [`trusted-public-keys`](#conf-trusted-public-keys)
)",
{"binary-caches"}};

7
src/libstore/legacy-ssh-store.cc
View file

@ -279,7 +279,12 @@ public:
conn->to.flush();
BuildResult status { .path = DerivedPath::Built { .drvPath = drvPath } };
BuildResult status {
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = OutputsSpec::All { },
},
};
status.status = (BuildResult::Status) readInt(conn->from);
conn->from >> status.errorMsg;

14
src/libstore/local-fs-store.cc
View file

@ -87,20 +87,8 @@ void LocalFSStore::narFromPath(const StorePath & path, Sink & sink)
const std::string LocalFSStore::drvsLogDir = "drvs";
std::optional<std::string> LocalFSStore::getBuildLog(const StorePath & path_)
std::optional<std::string> LocalFSStore::getBuildLogExact(const StorePath & path)
{
auto path = path_;
if (!path.isDerivation()) {
try {
auto info = queryPathInfo(path);
if (!info->deriver) return std::nullopt;
path = *info->deriver;
} catch (InvalidPath &) {
return std::nullopt;
}
}
auto baseName = path.to_string();
for (int j = 0; j < 2; j++) {

2
src/libstore/local-fs-store.hh
View file

@ -50,7 +50,7 @@ public:
return getRealStoreDir() + "/" + std::string(storePath, storeDir.size() + 1);
}
std::optional<std::string> getBuildLog(const StorePath & path) override;
std::optional<std::string> getBuildLogExact(const StorePath & path) override;
};

6
src/libstore/local-store.cc
View file

@ -441,9 +441,9 @@ LocalStore::~LocalStore()
}
try {
auto state(_state.lock());
if (state->fdTempRoots) {
state->fdTempRoots = -1;
auto fdTempRoots(_fdTempRoots.lock());
if (*fdTempRoots) {
*fdTempRoots = -1;
unlink(fnTempRoots.c_str());
}
} catch (...) {

24
src/libstore/local-store.hh
View file

@ -59,15 +59,6 @@ private:
struct Stmts;
std::unique_ptr<Stmts> stmts;
/* The global GC lock */
AutoCloseFD fdGCLock;
/* The file to which we write our temporary roots. */
AutoCloseFD fdTempRoots;
/* Connection to the garbage collector. */
AutoCloseFD fdRootsSocket;
/* The last time we checked whether to do an auto-GC, or an
auto-GC finished. */
std::chrono::time_point<std::chrono::steady_clock> lastGCCheck;
@ -156,6 +147,21 @@ public:
void addTempRoot(const StorePath & path) override;
private:
void createTempRootsFile();
/* The file to which we write our temporary roots. */
Sync<AutoCloseFD> _fdTempRoots;
/* The global GC lock. */
Sync<AutoCloseFD> _fdGCLock;
/* Connection to the garbage collector. */
Sync<AutoCloseFD> _fdRootsSocket;
public:
void addIndirectRoot(const Path & path) override;
private:

4
src/libstore/local.mk
View file

@ -13,10 +13,6 @@ ifdef HOST_LINUX
libstore_LDFLAGS += -ldl
endif
ifdef HOST_DARWIN
libstore_FILES = sandbox-defaults.sb sandbox-minimal.sb sandbox-network.sb
endif
$(foreach file,$(libstore_FILES),$(eval $(call install-data-in,$(d)/$(file),$(datadir)/nix/sandbox)))
ifeq ($(ENABLE_S3), 1)

12
src/libstore/lock.cc
View file

@ -123,8 +123,12 @@ struct AutoUserLock : UserLock
std::vector<gid_t> getSupplementaryGIDs() override { return {}; }
static std::unique_ptr<UserLock> acquire(uid_t nrIds, bool useChroot)
static std::unique_ptr<UserLock> acquire(uid_t nrIds, bool useUserNamespace)
{
#if !defined(__linux__)
useUserNamespace = false;
#endif
settings.requireExperimentalFeature(Xp::AutoAllocateUids);
assert(settings.startId > 0);
assert(settings.uidCount % maxIdsPerBuild == 0);
@ -157,7 +161,7 @@ struct AutoUserLock : UserLock
auto lock = std::make_unique<AutoUserLock>();
lock->fdUserLock = std::move(fd);
lock->firstUid = firstUid;
if (useChroot)
if (useUserNamespace)
lock->firstGid = firstUid;
else {
struct group * gr = getgrnam(settings.buildUsersGroup.get().c_str());
@ -174,10 +178,10 @@ struct AutoUserLock : UserLock
}
};
std::unique_ptr<UserLock> acquireUserLock(uid_t nrIds, bool useChroot)
std::unique_ptr<UserLock> acquireUserLock(uid_t nrIds, bool useUserNamespace)
{
if (settings.autoAllocateUids)
return AutoUserLock::acquire(nrIds, useChroot);
return AutoUserLock::acquire(nrIds, useUserNamespace);
else
return SimpleUserLock::acquire();
}

2
src/libstore/lock.hh
View file

@ -31,7 +31,7 @@ struct UserLock
/* Acquire a user lock for a UID range of size `nrIds`. Note that this
may return nullptr if no user is available. */
std::unique_ptr<UserLock> acquireUserLock(uid_t nrIds, bool useChroot);
std::unique_ptr<UserLock> acquireUserLock(uid_t nrIds, bool useUserNamespace);
bool useBuildUsers();

12
src/libstore/log-store.cc Normal file
View file

@ -0,0 +1,12 @@
#include "log-store.hh"
namespace nix {
std::optional<std::string> LogStore::getBuildLog(const StorePath & path) {
auto maybePath = getBuildDerivationPath(path);
if (!maybePath)
return std::nullopt;
return getBuildLogExact(maybePath.value());
}
}

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

@ -11,7 +11,9 @@ struct LogStore : public virtual Store
/* Return the build log of the specified store path, if available,
or null otherwise. */
virtual std::optional<std::string> getBuildLog(const StorePath & path) = 0;
std::optional<std::string> getBuildLog(const StorePath & path);
virtual std::optional<std::string> getBuildLogExact(const StorePath & path) = 0;
virtual void addBuildLog(const StorePath & path, std::string_view log) = 0;

45
src/libstore/misc.cc
View file

@ -185,7 +185,7 @@ void Store::queryMissing(const std::vector<DerivedPath> & targets,
knownOutputPaths = false;
break;
}
if (wantOutput(outputName, bfd.outputs) && !isValidPath(*pathOpt))
if (bfd.outputs.contains(outputName) && !isValidPath(*pathOpt))
invalid.insert(*pathOpt);
}
if (knownOutputPaths && invalid.empty()) return;
@ -301,4 +301,47 @@ std::map<DrvOutput, StorePath> drvOutputReferences(
return drvOutputReferences(Realisation::closure(store, inputRealisations), info->references);
}
OutputPathMap resolveDerivedPath(Store & store, const DerivedPath::Built & bfd, Store * evalStore_)
{
auto & evalStore = evalStore_ ? *evalStore_ : store;
OutputPathMap outputs;
auto drv = evalStore.readDerivation(bfd.drvPath);
auto outputHashes = staticOutputHashes(store, drv);
auto drvOutputs = drv.outputsAndOptPaths(store);
auto outputNames = std::visit(overloaded {
[&](const OutputsSpec::All &) {
StringSet names;
for (auto & [outputName, _] : drv.outputs)
names.insert(outputName);
return names;
},
[&](const OutputsSpec::Names & names) {
return static_cast<std::set<std::string>>(names);
},
}, bfd.outputs.raw());
for (auto & output : outputNames) {
auto outputHash = get(outputHashes, output);
if (!outputHash)
throw Error(
"the derivation '%s' doesn't have an output named '%s'",
store.printStorePath(bfd.drvPath), output);
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
DrvOutput outputId { *outputHash, output };
auto realisation = store.queryRealisation(outputId);
if (!realisation)
throw MissingRealisation(outputId);
outputs.insert_or_assign(output, realisation->outPath);
} else {
// If ca-derivations isn't enabled, assume that
// the output path is statically known.
auto drvOutput = get(drvOutputs, output);
assert(drvOutput);
assert(drvOutput->second);
outputs.insert_or_assign(output, *drvOutput->second);
}
}
return outputs;
}
}

195
src/libstore/outputs-spec.cc Normal file
View file

@ -0,0 +1,195 @@
#include <regex>
#include <nlohmann/json.hpp>
#include "util.hh"
#include "regex-combinators.hh"
#include "outputs-spec.hh"
#include "path-regex.hh"
namespace nix {
bool OutputsSpec::contains(const std::string & outputName) const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) {
return true;
},
[&](const OutputsSpec::Names & outputNames) {
return outputNames.count(outputName) > 0;
},
}, raw());
}
static std::string outputSpecRegexStr =
regex::either(
regex::group(R"(\*)"),
regex::group(regex::list(nameRegexStr)));
std::optional<OutputsSpec> OutputsSpec::parseOpt(std::string_view s)
{
static std::regex regex(std::string { outputSpecRegexStr });
std::smatch match;
std::string s2 { s }; // until some improves std::regex
if (!std::regex_match(s2, match, regex))
return std::nullopt;
if (match[1].matched)
return { OutputsSpec::All {} };
if (match[2].matched)
return OutputsSpec::Names { tokenizeString<StringSet>(match[2].str(), ",") };
assert(false);
}
OutputsSpec OutputsSpec::parse(std::string_view s)
{
std::optional spec = parseOpt(s);
if (!spec)
throw Error("invalid outputs specifier '%s'", s);
return *spec;
}
std::optional<std::pair<std::string_view, ExtendedOutputsSpec>> ExtendedOutputsSpec::parseOpt(std::string_view s)
{
auto found = s.rfind('^');
if (found == std::string::npos)
return std::pair { s, ExtendedOutputsSpec::Default {} };
auto specOpt = OutputsSpec::parseOpt(s.substr(found + 1));
if (!specOpt)
return std::nullopt;
return std::pair { s.substr(0, found), ExtendedOutputsSpec::Explicit { *std::move(specOpt) } };
}
std::pair<std::string_view, ExtendedOutputsSpec> ExtendedOutputsSpec::parse(std::string_view s)
{
std::optional spec = parseOpt(s);
if (!spec)
throw Error("invalid extended outputs specifier '%s'", s);
return *spec;
}
std::string OutputsSpec::to_string() const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) -> std::string {
return "*";
},
[&](const OutputsSpec::Names & outputNames) -> std::string {
return concatStringsSep(",", outputNames);
},
}, raw());
}
std::string ExtendedOutputsSpec::to_string() const
{
return std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default &) -> std::string {
return "";
},
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> std::string {
return "^" + outputSpec.to_string();
},
}, raw());
}
OutputsSpec OutputsSpec::union_(const OutputsSpec & that) const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) -> OutputsSpec {
return OutputsSpec::All { };
},
[&](const OutputsSpec::Names & theseNames) -> OutputsSpec {
return std::visit(overloaded {
[&](const OutputsSpec::All &) -> OutputsSpec {
return OutputsSpec::All {};
},
[&](const OutputsSpec::Names & thoseNames) -> OutputsSpec {
OutputsSpec::Names ret = theseNames;
ret.insert(thoseNames.begin(), thoseNames.end());
return ret;
},
}, that.raw());
},
}, raw());
}
bool OutputsSpec::isSubsetOf(const OutputsSpec & that) const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) {
return true;
},
[&](const OutputsSpec::Names & thoseNames) {
return std::visit(overloaded {
[&](const OutputsSpec::All &) {
return false;
},
[&](const OutputsSpec::Names & theseNames) {
bool ret = true;
for (auto & o : theseNames)
if (thoseNames.count(o) == 0)
ret = false;
return ret;
},
}, raw());
},
}, that.raw());
}
}
namespace nlohmann {
using namespace nix;
OutputsSpec adl_serializer<OutputsSpec>::from_json(const json & json) {
auto names = json.get<StringSet>();
if (names == StringSet({"*"}))
return OutputsSpec::All {};
else
return OutputsSpec::Names { std::move(names) };
}
void adl_serializer<OutputsSpec>::to_json(json & json, OutputsSpec t) {
std::visit(overloaded {
[&](const OutputsSpec::All &) {
json = std::vector<std::string>({"*"});
},
[&](const OutputsSpec::Names & names) {
json = names;
},
}, t.raw());
}
ExtendedOutputsSpec adl_serializer<ExtendedOutputsSpec>::from_json(const json & json) {
if (json.is_null())
return ExtendedOutputsSpec::Default {};
else {
return ExtendedOutputsSpec::Explicit { json.get<OutputsSpec>() };
}
}
void adl_serializer<ExtendedOutputsSpec>::to_json(json & json, ExtendedOutputsSpec t) {
std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default &) {
json = nullptr;
},
[&](const ExtendedOutputsSpec::Explicit & e) {
adl_serializer<OutputsSpec>::to_json(json, e);
},
}, t.raw());
}
}

95
src/libstore/outputs-spec.hh Normal file
View file

@ -0,0 +1,95 @@
#pragma once
#include <cassert>
#include <optional>
#include <set>
#include <variant>
#include "json-impls.hh"
namespace nix {
struct OutputNames : std::set<std::string> {
using std::set<std::string>::set;
/* These need to be "inherited manually" */
OutputNames(const std::set<std::string> & s)
: std::set<std::string>(s)
{ assert(!empty()); }
OutputNames(std::set<std::string> && s)
: std::set<std::string>(s)
{ assert(!empty()); }
/* This set should always be non-empty, so we delete this
constructor in order make creating empty ones by mistake harder.
*/
OutputNames() = delete;
};
struct AllOutputs : std::monostate { };
typedef std::variant<AllOutputs, OutputNames> _OutputsSpecRaw;
struct OutputsSpec : _OutputsSpecRaw {
using Raw = _OutputsSpecRaw;
using Raw::Raw;
/* Force choosing a variant */
OutputsSpec() = delete;
using Names = OutputNames;
using All = AllOutputs;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
inline Raw & raw() {
return static_cast<Raw &>(*this);
}
bool contains(const std::string & output) const;
/* Create a new OutputsSpec which is the union of this and that. */
OutputsSpec union_(const OutputsSpec & that) const;
/* Whether this OutputsSpec is a subset of that. */
bool isSubsetOf(const OutputsSpec & outputs) const;
/* Parse a string of the form 'output1,...outputN' or
'*', returning the outputs spec. */
static OutputsSpec parse(std::string_view s);
static std::optional<OutputsSpec> parseOpt(std::string_view s);
std::string to_string() const;
};
struct DefaultOutputs : std::monostate { };
typedef std::variant<DefaultOutputs, OutputsSpec> _ExtendedOutputsSpecRaw;
struct ExtendedOutputsSpec : _ExtendedOutputsSpecRaw {
using Raw = _ExtendedOutputsSpecRaw;
using Raw::Raw;
using Default = DefaultOutputs;
using Explicit = OutputsSpec;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
/* Parse a string of the form 'prefix^output1,...outputN' or
'prefix^*', returning the prefix and the extended outputs spec. */
static std::pair<std::string_view, ExtendedOutputsSpec> parse(std::string_view s);
static std::optional<std::pair<std::string_view, ExtendedOutputsSpec>> parseOpt(std::string_view s);
std::string to_string() const;
};
}
JSON_IMPL(OutputsSpec)
JSON_IMPL(ExtendedOutputsSpec)

75
src/libstore/path-info.cc
View file

@ -3,6 +3,80 @@
namespace nix {
std::string ValidPathInfo::fingerprint(const Store & store) const
{
if (narSize == 0)
throw Error("cannot calculate fingerprint of path '%s' because its size is not known",
store.printStorePath(path));
return
"1;" + store.printStorePath(path) + ";"
+ narHash.to_string(Base32, true) + ";"
+ std::to_string(narSize) + ";"
+ concatStringsSep(",", store.printStorePathSet(references));
}
void ValidPathInfo::sign(const Store & store, const SecretKey & secretKey)
{
sigs.insert(secretKey.signDetached(fingerprint(store)));
}
bool ValidPathInfo::isContentAddressed(const Store & store) const
{
if (! ca) return false;
auto caPath = std::visit(overloaded {
[&](const TextHash & th) {
return store.makeTextPath(path.name(), th.hash, references);
},
[&](const FixedOutputHash & fsh) {
auto refs = references;
bool hasSelfReference = false;
if (refs.count(path)) {
hasSelfReference = true;
refs.erase(path);
}
return store.makeFixedOutputPath(fsh.method, fsh.hash, path.name(), refs, hasSelfReference);
}
}, *ca);
bool res = caPath == path;
if (!res)
printError("warning: path '%s' claims to be content-addressed but isn't", store.printStorePath(path));
return res;
}
size_t ValidPathInfo::checkSignatures(const Store & store, const PublicKeys & publicKeys) const
{
if (isContentAddressed(store)) return maxSigs;
size_t good = 0;
for (auto & sig : sigs)
if (checkSignature(store, publicKeys, sig))
good++;
return good;
}
bool ValidPathInfo::checkSignature(const Store & store, const PublicKeys & publicKeys, const std::string & sig) const
{
return verifyDetached(fingerprint(store), sig, publicKeys);
}
Strings ValidPathInfo::shortRefs() const
{
Strings refs;
for (auto & r : references)
refs.push_back(std::string(r.to_string()));
return refs;
}
ValidPathInfo ValidPathInfo::read(Source & source, const Store & store, unsigned int format)
{
return read(source, store, format, store.parseStorePath(readString(source)));
@ -24,6 +98,7 @@ ValidPathInfo ValidPathInfo::read(Source & source, const Store & store, unsigned
return info;
}
void ValidPathInfo::write(
Sink & sink,
const Store & store,

7
src/libstore/path-regex.hh Normal file
View file

@ -0,0 +1,7 @@
#pragma once
namespace nix {
static constexpr std::string_view nameRegexStr = R"([0-9a-zA-Z\+\-\._\?=]+)";
}

81
src/libstore/path-with-outputs.cc
View file

@ -1,6 +1,5 @@
#include "path-with-outputs.hh"
#include "store-api.hh"
#include "nlohmann/json.hpp"
#include <regex>
@ -16,10 +15,14 @@ std::string StorePathWithOutputs::to_string(const Store & store) const
DerivedPath StorePathWithOutputs::toDerivedPath() const
{
if (!outputs.empty() || path.isDerivation())
return DerivedPath::Built { path, outputs };
else
if (!outputs.empty()) {
return DerivedPath::Built { path, OutputsSpec::Names { outputs } };
} else if (path.isDerivation()) {
assert(outputs.empty());
return DerivedPath::Built { path, OutputsSpec::All { } };
} else {
return DerivedPath::Opaque { path };
}
}
@ -42,7 +45,18 @@ std::variant<StorePathWithOutputs, StorePath> StorePathWithOutputs::tryFromDeriv
return StorePathWithOutputs { bo.path };
},
[&](const DerivedPath::Built & bfd) -> std::variant<StorePathWithOutputs, StorePath> {
return StorePathWithOutputs { bfd.drvPath, bfd.outputs };
return StorePathWithOutputs {
.path = bfd.drvPath,
// Use legacy encoding of wildcard as empty set
.outputs = std::visit(overloaded {
[&](const OutputsSpec::All &) -> StringSet {
return {};
},
[&](const OutputsSpec::Names & outputs) {
return static_cast<StringSet>(outputs);
},
}, bfd.outputs.raw()),
};
},
}, p.raw());
}
@ -53,8 +67,8 @@ std::pair<std::string_view, StringSet> parsePathWithOutputs(std::string_view s)
size_t n = s.find("!");
return n == s.npos
? std::make_pair(s, std::set<std::string>())
: std::make_pair(((std::string_view) s).substr(0, n),
tokenizeString<std::set<std::string>>(((std::string_view) s).substr(n + 1), ","));
: std::make_pair(s.substr(0, n),
tokenizeString<std::set<std::string>>(s.substr(n + 1), ","));
}
@ -71,57 +85,4 @@ StorePathWithOutputs followLinksToStorePathWithOutputs(const Store & store, std:
return StorePathWithOutputs { store.followLinksToStorePath(path), std::move(outputs) };
}
std::pair<std::string, OutputsSpec> parseOutputsSpec(const std::string & s)
{
static std::regex regex(R"((.*)\^((\*)|([a-z]+(,[a-z]+)*)))");
std::smatch match;
if (!std::regex_match(s, match, regex))
return {s, DefaultOutputs()};
if (match[3].matched)
return {match[1], AllOutputs()};
return {match[1], tokenizeString<OutputNames>(match[4].str(), ",")};
}
std::string printOutputsSpec(const OutputsSpec & outputsSpec)
{
if (std::get_if<DefaultOutputs>(&outputsSpec))
return "";
if (std::get_if<AllOutputs>(&outputsSpec))
return "^*";
if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
return "^" + concatStringsSep(",", *outputNames);
assert(false);
}
void to_json(nlohmann::json & json, const OutputsSpec & outputsSpec)
{
if (std::get_if<DefaultOutputs>(&outputsSpec))
json = nullptr;
else if (std::get_if<AllOutputs>(&outputsSpec))
json = std::vector<std::string>({"*"});
else if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
json = *outputNames;
}
void from_json(const nlohmann::json & json, OutputsSpec & outputsSpec)
{
if (json.is_null())
outputsSpec = DefaultOutputs();
else {
auto names = json.get<OutputNames>();
if (names == OutputNames({"*"}))
outputsSpec = AllOutputs();
else
outputsSpec = names;
}
}
}

31
src/libstore/path-with-outputs.hh
View file

@ -1,13 +1,17 @@
#pragma once
#include <variant>
#include "path.hh"
#include "derived-path.hh"
#include "nlohmann/json_fwd.hpp"
namespace nix {
/* This is a deprecated old type just for use by the old CLI, and older
versions of the RPC protocols. In new code don't use it; you want
`DerivedPath` instead.
`DerivedPath` is better because it handles more cases, and does so more
explicitly without devious punning tricks.
*/
struct StorePathWithOutputs
{
StorePath path;
@ -33,25 +37,4 @@ StorePathWithOutputs parsePathWithOutputs(const Store & store, std::string_view
StorePathWithOutputs followLinksToStorePathWithOutputs(const Store & store, std::string_view pathWithOutputs);
typedef std::set<std::string> OutputNames;
struct AllOutputs {
bool operator < (const AllOutputs & _) const { return false; }
};
struct DefaultOutputs {
bool operator < (const DefaultOutputs & _) const { return false; }
};
typedef std::variant<DefaultOutputs, AllOutputs, OutputNames> OutputsSpec;
/* Parse a string of the form 'prefix^output1,...outputN' or
'prefix^*', returning the prefix and the outputs spec. */
std::pair<std::string, OutputsSpec> parseOutputsSpec(const std::string & s);
std::string printOutputsSpec(const OutputsSpec & outputsSpec);
void to_json(nlohmann::json &, const OutputsSpec &);
void from_json(const nlohmann::json &, OutputsSpec &);
}

6
src/libstore/path.cc
View file

@ -8,8 +8,10 @@ static void checkName(std::string_view path, std::string_view name)
{
if (name.empty())
throw BadStorePath("store path '%s' has an empty name", path);
if (name.size() > 211)
throw BadStorePath("store path '%s' has a name longer than 211 characters", path);
if (name.size() > StorePath::MaxPathLen)
throw BadStorePath("store path '%s' has a name longer than '%d characters",
StorePath::MaxPathLen, path);
// See nameRegexStr for the definition
for (auto c : name)
if (!((c >= '0' && c <= '9')
|| (c >= 'a' && c <= 'z')

4
src/libstore/path.hh
View file

@ -5,7 +5,6 @@
namespace nix {
class Store;
struct Hash;
class StorePath
@ -17,6 +16,8 @@ public:
/* Size of the hash part of store paths, in base-32 characters. */
constexpr static size_t HashLen = 32; // i.e. 160 bits
constexpr static size_t MaxPathLen = 211;
StorePath() = delete;
StorePath(std::string_view baseName);
@ -64,7 +65,6 @@ public:
typedef std::set<StorePath> StorePathSet;
typedef std::vector<StorePath> StorePaths;
typedef std::map<std::string, StorePath> OutputPathMap;
typedef std::map<StorePath, std::optional<ContentAddress>> StorePathCAMap;

12
src/libstore/realisation.hh
View file

@ -7,6 +7,8 @@
namespace nix {
class Store;
struct DrvOutput {
// The hash modulo of the derivation
Hash drvHash;
@ -93,4 +95,14 @@ struct RealisedPath {
GENERATE_CMP(RealisedPath, me->raw);
};
class MissingRealisation : public Error
{
public:
MissingRealisation(DrvOutput & outputId)
: Error( "cannot operate on an output of the "
"unbuilt derivation '%s'",
outputId.to_string())
{}
};
}

23
src/libstore/remote-store.cc
View file

@ -867,8 +867,8 @@ std::vector<BuildResult> RemoteStore::buildPathsWithResults(
OutputPathMap outputs;
auto drv = evalStore->readDerivation(bfd.drvPath);
const auto outputHashes = staticOutputHashes(*evalStore, drv); // FIXME: expensive
const auto drvOutputs = drv.outputsAndOptPaths(*this);
for (auto & output : bfd.outputs) {
auto built = resolveDerivedPath(*this, bfd, &*evalStore);
for (auto & [output, outputPath] : built) {
auto outputHash = get(outputHashes, output);
if (!outputHash)
throw Error(
@ -879,22 +879,14 @@ std::vector<BuildResult> RemoteStore::buildPathsWithResults(
auto realisation =
queryRealisation(outputId);
if (!realisation)
throw Error(
"cannot operate on an output of unbuilt "
"content-addressed derivation '%s'",
outputId.to_string());
throw MissingRealisation(outputId);
res.builtOutputs.emplace(realisation->id, *realisation);
} else {
// If ca-derivations isn't enabled, assume that
// the output path is statically known.
const auto drvOutput = get(drvOutputs, output);
assert(drvOutput);
assert(drvOutput->second);
res.builtOutputs.emplace(
outputId,
Realisation {
.id = outputId,
.outPath = *drvOutput->second,
.outPath = outputPath,
});
}
}
@ -918,7 +910,12 @@ BuildResult RemoteStore::buildDerivation(const StorePath & drvPath, const BasicD
writeDerivation(conn->to, *this, drv);
conn->to << buildMode;
conn.processStderr();
BuildResult res { .path = DerivedPath::Built { .drvPath = drvPath } };
BuildResult res {
.path = DerivedPath::Built {
.drvPath = drvPath,
.outputs = OutputsSpec::All { },
},
};
res.status = (BuildResult::Status) readInt(conn->from);
conn->from >> res.errorMsg;
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 29) {

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

@ -53,8 +53,8 @@ public:
{ return false; }
// FIXME extend daemon protocol, move implementation to RemoteStore
std::optional<std::string> getBuildLog(const StorePath & path) override
{ unsupported("getBuildLog"); }
std::optional<std::string> getBuildLogExact(const StorePath & path) override
{ unsupported("getBuildLogExact"); }
private:

101
src/libstore/store-api.cc
View file

@ -1210,79 +1210,6 @@ std::string showPaths(const PathSet & paths)
}
std::string ValidPathInfo::fingerprint(const Store & store) const
{
if (narSize == 0)
throw Error("cannot calculate fingerprint of path '%s' because its size is not known",
store.printStorePath(path));
return
"1;" + store.printStorePath(path) + ";"
+ narHash.to_string(Base32, true) + ";"
+ std::to_string(narSize) + ";"
+ concatStringsSep(",", store.printStorePathSet(references));
}
void ValidPathInfo::sign(const Store & store, const SecretKey & secretKey)
{
sigs.insert(secretKey.signDetached(fingerprint(store)));
}
bool ValidPathInfo::isContentAddressed(const Store & store) const
{
if (! ca) return false;
auto caPath = std::visit(overloaded {
[&](const TextHash & th) {
return store.makeTextPath(path.name(), th.hash, references);
},
[&](const FixedOutputHash & fsh) {
auto refs = references;
bool hasSelfReference = false;
if (refs.count(path)) {
hasSelfReference = true;
refs.erase(path);
}
return store.makeFixedOutputPath(fsh.method, fsh.hash, path.name(), refs, hasSelfReference);
}
}, *ca);
bool res = caPath == path;
if (!res)
printError("warning: path '%s' claims to be content-addressed but isn't", store.printStorePath(path));
return res;
}
size_t ValidPathInfo::checkSignatures(const Store & store, const PublicKeys & publicKeys) const
{
if (isContentAddressed(store)) return maxSigs;
size_t good = 0;
for (auto & sig : sigs)
if (checkSignature(store, publicKeys, sig))
good++;
return good;
}
bool ValidPathInfo::checkSignature(const Store & store, const PublicKeys & publicKeys, const std::string & sig) const
{
return verifyDetached(fingerprint(store), sig, publicKeys);
}
Strings ValidPathInfo::shortRefs() const
{
Strings refs;
for (auto & r : references)
refs.push_back(std::string(r.to_string()));
return refs;
}
Derivation Store::derivationFromPath(const StorePath & drvPath)
{
ensurePath(drvPath);
@ -1301,6 +1228,34 @@ Derivation readDerivationCommon(Store& store, const StorePath& drvPath, bool req
}
}
std::optional<StorePath> Store::getBuildDerivationPath(const StorePath & path)
{
if (!path.isDerivation()) {
try {
auto info = queryPathInfo(path);
if (!info->deriver) return std::nullopt;
return *info->deriver;
} catch (InvalidPath &) {
return std::nullopt;
}
}
if (!settings.isExperimentalFeatureEnabled(Xp::CaDerivations) || !isValidPath(path))
return path;
auto drv = readDerivation(path);
if (!drv.type().hasKnownOutputPaths()) {
// The build log is actually attached to the corresponding
// resolved derivation, so we need to get it first
auto resolvedDrv = drv.tryResolve(*this);
if (resolvedDrv)
return writeDerivation(*this, *resolvedDrv, NoRepair, true);
}
return path;
}
Derivation Store::readDerivation(const StorePath & drvPath)
{ return readDerivationCommon(*this, drvPath, true); }

17
src/libstore/store-api.hh
View file

@ -71,6 +71,9 @@ class NarInfoDiskCache;
class Store;
typedef std::map<std::string, StorePath> OutputPathMap;
enum CheckSigsFlag : bool { NoCheckSigs = false, CheckSigs = true };
enum SubstituteFlag : bool { NoSubstitute = false, Substitute = true };
enum AllowInvalidFlag : bool { DisallowInvalid = false, AllowInvalid = true };
@ -120,6 +123,8 @@ public:
typedef std::map<std::string, std::string> Params;
protected:
struct PathInfoCacheValue {
@ -618,6 +623,13 @@ public:
*/
StorePathSet exportReferences(const StorePathSet & storePaths, const StorePathSet & inputPaths);
/**
* Given a store path, return the realisation actually used in the realisation of this path:
* - If the path is a content-addressed derivation, try to resolve it
* - Otherwise, find one of its derivers
*/
std::optional<StorePath> getBuildDerivationPath(const StorePath &);
/* Hack to allow long-running processes like hydra-queue-runner to
occasionally flush their path info cache. */
void clearPathInfoCache()
@ -719,6 +731,11 @@ void copyClosure(
void removeTempRoots();
/* Resolve the derived path completely, failing if any derivation output
is unknown. */
OutputPathMap resolveDerivedPath(Store &, const DerivedPath::Built &, Store * evalStore = nullptr);
/* Return a Store object to access the Nix store denoted by
‘uri’ (slight misnomer...). Supported values are:

23
src/libstore/tests/libstoretests.hh Normal file
View file

@ -0,0 +1,23 @@
#include <gtest/gtest.h>
#include <gmock/gmock.h>
#include "store-api.hh"
namespace nix {
class LibStoreTest : public ::testing::Test {
public:
static void SetUpTestSuite() {
initLibStore();
}
protected:
LibStoreTest()
: store(openStore("dummy://"))
{ }
ref<Store> store;
};
} /* namespace nix */

2
src/libstore/tests/local.mk
View file

@ -12,4 +12,4 @@ libstore-tests_CXXFLAGS += -I src/libstore -I src/libutil
libstore-tests_LIBS = libstore libutil
libstore-tests_LDFLAGS := $(GTEST_LIBS)
libstore-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)

201
src/libstore/tests/outputs-spec.cc Normal file
View file

@ -0,0 +1,201 @@
#include "outputs-spec.hh"
#include <nlohmann/json.hpp>
#include <gtest/gtest.h>
namespace nix {
#ifndef NDEBUG
TEST(OutputsSpec, no_empty_names) {
ASSERT_DEATH(OutputsSpec::Names { std::set<std::string> { } }, "");
}
#endif
#define TEST_DONT_PARSE(NAME, STR) \
TEST(OutputsSpec, bad_ ## NAME) { \
std::optional OutputsSpecOpt = \
OutputsSpec::parseOpt(STR); \
ASSERT_FALSE(OutputsSpecOpt); \
}
TEST_DONT_PARSE(empty, "")
TEST_DONT_PARSE(garbage, "&*()")
TEST_DONT_PARSE(double_star, "**")
TEST_DONT_PARSE(star_first, "*,foo")
TEST_DONT_PARSE(star_second, "foo,*")
#undef TEST_DONT_PARSE
TEST(OutputsSpec, all) {
std::string_view str = "*";
OutputsSpec expected = OutputsSpec::All { };
ASSERT_EQ(OutputsSpec::parse(str), expected);
ASSERT_EQ(expected.to_string(), str);
}
TEST(OutputsSpec, names_out) {
std::string_view str = "out";
OutputsSpec expected = OutputsSpec::Names { "out" };
ASSERT_EQ(OutputsSpec::parse(str), expected);
ASSERT_EQ(expected.to_string(), str);
}
TEST(OutputsSpec, names_underscore) {
std::string_view str = "a_b";
OutputsSpec expected = OutputsSpec::Names { "a_b" };
ASSERT_EQ(OutputsSpec::parse(str), expected);
ASSERT_EQ(expected.to_string(), str);
}
TEST(OutputsSpec, names_numberic) {
std::string_view str = "01";
OutputsSpec expected = OutputsSpec::Names { "01" };
ASSERT_EQ(OutputsSpec::parse(str), expected);
ASSERT_EQ(expected.to_string(), str);
}
TEST(OutputsSpec, names_out_bin) {
OutputsSpec expected = OutputsSpec::Names { "out", "bin" };
ASSERT_EQ(OutputsSpec::parse("out,bin"), expected);
// N.B. This normalization is OK.
ASSERT_EQ(expected.to_string(), "bin,out");
}
#define TEST_SUBSET(X, THIS, THAT) \
X((OutputsSpec { THIS }).isSubsetOf(THAT));
TEST(OutputsSpec, subsets_all_all) {
TEST_SUBSET(ASSERT_TRUE, OutputsSpec::All { }, OutputsSpec::All { });
}
TEST(OutputsSpec, subsets_names_all) {
TEST_SUBSET(ASSERT_TRUE, OutputsSpec::Names { "a" }, OutputsSpec::All { });
}
TEST(OutputsSpec, subsets_names_names_eq) {
TEST_SUBSET(ASSERT_TRUE, OutputsSpec::Names { "a" }, OutputsSpec::Names { "a" });
}
TEST(OutputsSpec, subsets_names_names_noneq) {
TEST_SUBSET(ASSERT_TRUE, OutputsSpec::Names { "a" }, (OutputsSpec::Names { "a", "b" }));
}
TEST(OutputsSpec, not_subsets_all_names) {
TEST_SUBSET(ASSERT_FALSE, OutputsSpec::All { }, OutputsSpec::Names { "a" });
}
TEST(OutputsSpec, not_subsets_names_names) {
TEST_SUBSET(ASSERT_FALSE, (OutputsSpec::Names { "a", "b" }), (OutputsSpec::Names { "a" }));
}
#undef TEST_SUBSET
#define TEST_UNION(RES, THIS, THAT) \
ASSERT_EQ(OutputsSpec { RES }, (OutputsSpec { THIS }).union_(THAT));
TEST(OutputsSpec, union_all_all) {
TEST_UNION(OutputsSpec::All { }, OutputsSpec::All { }, OutputsSpec::All { });
}
TEST(OutputsSpec, union_all_names) {
TEST_UNION(OutputsSpec::All { }, OutputsSpec::All { }, OutputsSpec::Names { "a" });
}
TEST(OutputsSpec, union_names_all) {
TEST_UNION(OutputsSpec::All { }, OutputsSpec::Names { "a" }, OutputsSpec::All { });
}
TEST(OutputsSpec, union_names_names) {
TEST_UNION((OutputsSpec::Names { "a", "b" }), OutputsSpec::Names { "a" }, OutputsSpec::Names { "b" });
}
#undef TEST_UNION
#define TEST_DONT_PARSE(NAME, STR) \
TEST(ExtendedOutputsSpec, bad_ ## NAME) { \
std::optional extendedOutputsSpecOpt = \
ExtendedOutputsSpec::parseOpt(STR); \
ASSERT_FALSE(extendedOutputsSpecOpt); \
}
TEST_DONT_PARSE(carot_empty, "^")
TEST_DONT_PARSE(prefix_carot_empty, "foo^")
TEST_DONT_PARSE(garbage, "^&*()")
TEST_DONT_PARSE(double_star, "^**")
TEST_DONT_PARSE(star_first, "^*,foo")
TEST_DONT_PARSE(star_second, "^foo,*")
#undef TEST_DONT_PARSE
TEST(ExtendedOutputsSpec, defeault) {
std::string_view str = "foo";
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(str);
ASSERT_EQ(prefix, "foo");
ExtendedOutputsSpec expected = ExtendedOutputsSpec::Default { };
ASSERT_EQ(extendedOutputsSpec, expected);
ASSERT_EQ(std::string { prefix } + expected.to_string(), str);
}
TEST(ExtendedOutputsSpec, all) {
std::string_view str = "foo^*";
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(str);
ASSERT_EQ(prefix, "foo");
ExtendedOutputsSpec expected = OutputsSpec::All { };
ASSERT_EQ(extendedOutputsSpec, expected);
ASSERT_EQ(std::string { prefix } + expected.to_string(), str);
}
TEST(ExtendedOutputsSpec, out) {
std::string_view str = "foo^out";
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(str);
ASSERT_EQ(prefix, "foo");
ExtendedOutputsSpec expected = OutputsSpec::Names { "out" };
ASSERT_EQ(extendedOutputsSpec, expected);
ASSERT_EQ(std::string { prefix } + expected.to_string(), str);
}
TEST(ExtendedOutputsSpec, out_bin) {
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse("foo^out,bin");
ASSERT_EQ(prefix, "foo");
ExtendedOutputsSpec expected = OutputsSpec::Names { "out", "bin" };
ASSERT_EQ(extendedOutputsSpec, expected);
ASSERT_EQ(std::string { prefix } + expected.to_string(), "foo^bin,out");
}
TEST(ExtendedOutputsSpec, many_carrot) {
auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse("foo^bar^out,bin");
ASSERT_EQ(prefix, "foo^bar");
ExtendedOutputsSpec expected = OutputsSpec::Names { "out", "bin" };
ASSERT_EQ(extendedOutputsSpec, expected);
ASSERT_EQ(std::string { prefix } + expected.to_string(), "foo^bar^bin,out");
}
#define TEST_JSON(TYPE, NAME, STR, VAL) \
\
TEST(TYPE, NAME ## _to_json) { \
using nlohmann::literals::operator "" _json; \
ASSERT_EQ( \
STR ## _json, \
((nlohmann::json) TYPE { VAL })); \
} \
\
TEST(TYPE, NAME ## _from_json) { \
using nlohmann::literals::operator "" _json; \
ASSERT_EQ( \
TYPE { VAL }, \
(STR ## _json).get<TYPE>()); \
}
TEST_JSON(OutputsSpec, all, R"(["*"])", OutputsSpec::All { })
TEST_JSON(OutputsSpec, name, R"(["a"])", OutputsSpec::Names { "a" })
TEST_JSON(OutputsSpec, names, R"(["a","b"])", (OutputsSpec::Names { "a", "b" }))
TEST_JSON(ExtendedOutputsSpec, def, R"(null)", ExtendedOutputsSpec::Default { })
TEST_JSON(ExtendedOutputsSpec, all, R"(["*"])", ExtendedOutputsSpec::Explicit { OutputsSpec::All { } })
TEST_JSON(ExtendedOutputsSpec, name, R"(["a"])", ExtendedOutputsSpec::Explicit { OutputsSpec::Names { "a" } })
TEST_JSON(ExtendedOutputsSpec, names, R"(["a","b"])", (ExtendedOutputsSpec::Explicit { OutputsSpec::Names { "a", "b" } }))
#undef TEST_JSON
}

46
src/libstore/tests/path-with-outputs.cc
View file

@ -1,46 +0,0 @@
#include "path-with-outputs.hh"
#include <gtest/gtest.h>
namespace nix {
TEST(parseOutputsSpec, basic)
{
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo");
ASSERT_EQ(prefix, "foo");
ASSERT_TRUE(std::get_if<DefaultOutputs>(&outputsSpec));
}
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo^*");
ASSERT_EQ(prefix, "foo");
ASSERT_TRUE(std::get_if<AllOutputs>(&outputsSpec));
}
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo^out");
ASSERT_EQ(prefix, "foo");
ASSERT_TRUE(std::get<OutputNames>(outputsSpec) == OutputNames({"out"}));
}
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo^out,bin");
ASSERT_EQ(prefix, "foo");
ASSERT_TRUE(std::get<OutputNames>(outputsSpec) == OutputNames({"out", "bin"}));
}
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo^bar^out,bin");
ASSERT_EQ(prefix, "foo^bar");
ASSERT_TRUE(std::get<OutputNames>(outputsSpec) == OutputNames({"out", "bin"}));
}
{
auto [prefix, outputsSpec] = parseOutputsSpec("foo^&*()");
ASSERT_EQ(prefix, "foo^&*()");
ASSERT_TRUE(std::get_if<DefaultOutputs>(&outputsSpec));
}
}
}

144
src/libstore/tests/path.cc Normal file
View file

@ -0,0 +1,144 @@
#include <regex>
#include <nlohmann/json.hpp>
#include <gtest/gtest.h>
#include <rapidcheck/gtest.h>
#include "path-regex.hh"
#include "store-api.hh"
#include "libstoretests.hh"
namespace nix {
#define STORE_DIR "/nix/store/"
#define HASH_PART "g1w7hy3qg1w7hy3qg1w7hy3qg1w7hy3q"
class StorePathTest : public LibStoreTest
{
};
static std::regex nameRegex { std::string { nameRegexStr } };
#define TEST_DONT_PARSE(NAME, STR) \
TEST_F(StorePathTest, bad_ ## NAME) { \
std::string_view str = \
STORE_DIR HASH_PART "-" STR; \
ASSERT_THROW( \
store->parseStorePath(str), \
BadStorePath); \
std::string name { STR }; \
EXPECT_FALSE(std::regex_match(name, nameRegex)); \
}
TEST_DONT_PARSE(empty, "")
TEST_DONT_PARSE(garbage, "&*()")
TEST_DONT_PARSE(double_star, "**")
TEST_DONT_PARSE(star_first, "*,foo")
TEST_DONT_PARSE(star_second, "foo,*")
TEST_DONT_PARSE(bang, "foo!o")
#undef TEST_DONT_PARSE
#define TEST_DO_PARSE(NAME, STR) \
TEST_F(StorePathTest, good_ ## NAME) { \
std::string_view str = \
STORE_DIR HASH_PART "-" STR; \
auto p = store->parseStorePath(str); \
std::string name { p.name() }; \
EXPECT_TRUE(std::regex_match(name, nameRegex)); \
}
// 0-9 a-z A-Z + - . _ ? =
TEST_DO_PARSE(numbers, "02345")
TEST_DO_PARSE(lower_case, "foo")
TEST_DO_PARSE(upper_case, "FOO")
TEST_DO_PARSE(plus, "foo+bar")
TEST_DO_PARSE(dash, "foo-dev")
TEST_DO_PARSE(underscore, "foo_bar")
TEST_DO_PARSE(period, "foo.txt")
TEST_DO_PARSE(question_mark, "foo?why")
TEST_DO_PARSE(equals_sign, "foo=foo")
#undef TEST_DO_PARSE
// For rapidcheck
void showValue(const StorePath & p, std::ostream & os) {
os << p.to_string();
}
}
namespace rc {
using namespace nix;
template<>
struct Arbitrary<StorePath> {
static Gen<StorePath> arbitrary();
};
Gen<StorePath> Arbitrary<StorePath>::arbitrary()
{
auto len = *gen::inRange<size_t>(1, StorePath::MaxPathLen);
std::string pre { HASH_PART "-" };
pre.reserve(pre.size() + len);
for (size_t c = 0; c < len; ++c) {
switch (auto i = *gen::inRange<uint8_t>(0, 10 + 2 * 26 + 6)) {
case 0 ... 9:
pre += '0' + i;
case 10 ... 35:
pre += 'A' + (i - 10);
break;
case 36 ... 61:
pre += 'a' + (i - 36);
break;
case 62:
pre += '+';
break;
case 63:
pre += '-';
break;
case 64:
pre += '.';
break;
case 65:
pre += '_';
break;
case 66:
pre += '?';
break;
case 67:
pre += '=';
break;
default:
assert(false);
}
}
return gen::just(StorePath { pre });
}
} // namespace rc
namespace nix {
RC_GTEST_FIXTURE_PROP(
StorePathTest,
prop_regex_accept,
(const StorePath & p))
{
RC_ASSERT(std::regex_match(std::string { p.name() }, nameRegex));
}
RC_GTEST_FIXTURE_PROP(
StorePathTest,
prop_round_rip,
(const StorePath & p))
{
RC_ASSERT(p == store->parseStorePath(store->printStorePath(p)));
}
}

2
src/libutil/error.hh
View file

@ -74,6 +74,8 @@ struct AbstractPos
virtual void print(std::ostream & out) const = 0;
std::optional<LinesOfCode> getCodeLines() const;
virtual ~AbstractPos() = default;
};
std::ostream & operator << (std::ostream & str, const AbstractPos & pos);

14
src/libutil/json-impls.hh Normal file
View file

@ -0,0 +1,14 @@
#pragma once
#include "nlohmann/json_fwd.hpp"
// Following https://github.com/nlohmann/json#how-can-i-use-get-for-non-default-constructiblenon-copyable-types
#define JSON_IMPL(TYPE) \
namespace nlohmann { \
using namespace nix; \
template <> \
struct adl_serializer<TYPE> { \
static TYPE from_json(const json & json); \
static void to_json(json & json, TYPE t); \
}; \
}

23
src/libutil/monitor-fd.hh
View file

@ -25,11 +25,17 @@ public:
/* Wait indefinitely until a POLLHUP occurs. */
struct pollfd fds[1];
fds[0].fd = fd;
/* This shouldn't be necessary, but macOS doesn't seem to
like a zeroed out events field.
See rdar://37537852.
*/
fds[0].events = POLLHUP;
/* Polling for no specific events (i.e. just waiting
for an error/hangup) doesn't work on macOS
anymore. So wait for read events and ignore
them. */
fds[0].events =
#ifdef __APPLE__
POLLRDNORM
#else
0
#endif
;
auto count = poll(fds, 1, -1);
if (count == -1) abort(); // can't happen
/* This shouldn't happen, but can on macOS due to a bug.
@ -40,10 +46,15 @@ public:
too harmful.
*/
if (count == 0) continue;
assert(fds[0].revents & POLLHUP);
if (fds[0].revents & POLLHUP) {
triggerInterrupt();
break;
}
/* This will only happen on macOS. We sleep a bit to
avoid waking up too often if the client is sending
input. */
sleep(1);
}
});
};

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