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Merge remote-tracking branch 'upstream/master' into path-info

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John Ericson 2023-04-07 20:39:04 -04:00
parent 5d56e2daf7 4411c7d7e0
commit fd21f9d76e
211 changed files with 3961 additions and 1506 deletions
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1
.github/PULL_REQUEST_TEMPLATE.md vendored
View file

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

22
boehmgc-coroutine-sp-fallback.diff
View file

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

1
doc/manual/src/SUMMARY.md.in
View file

@ -95,6 +95,7 @@
- [Glossary](glossary.md)
- [Contributing](contributing/contributing.md)
- [Hacking](contributing/hacking.md)
- [Experimental Features](contributing/experimental-features.md)
- [CLI guideline](contributing/cli-guideline.md)
- [Release Notes](release-notes/release-notes.md)
- [Release X.Y (202?-??-??)](release-notes/rl-next.md)

3
doc/manual/src/command-ref/nix-shell.md
View file

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

91
doc/manual/src/contributing/experimental-features.md Normal file
View file

@ -0,0 +1,91 @@
This section describes the notion of *experimental features*, and how it fits into the big picture of the development of Nix.
# What are experimental features?
Experimental features are considered unstable, which means that they can be changed or removed at any time.
Users must explicitly enable them by toggling the associated [experimental feature flags](@docroot@/command-ref/conf-file.md#conf-experimental-features).
This allows accessing unstable functionality without unwittingly relying on it.
Experimental feature flags were first introduced in [Nix 2.4](@docroot@/release-notes/rl-2.4.md).
Before that, Nix did have experimental features, but they were not guarded by flags and were merely documented as unstable.
This was a source of confusion and controversy.
# When should a new feature be marked experimental?
A change in the Nix codebase should be guarded by an experimental feature flag if it is considered likely to be reverted or adapted in a backwards-incompatible manner after gathering more experience with it in practice.
Examples:
- Changes to the Nix language, such as new built-ins, syntactic or semantic changes, etc.
- Changes to the command-line interface
# Lifecycle of an experimental feature
Experimental features have to be treated on a case-by-case basis.
However, the standard workflow for an experimental feature is as follows:
- A new feature is implemented in a *pull request*
- It is guarded by an experimental feature flag that is disabled by default
- The pull request is merged, the *experimental* feature ends up in a release
- Using the feature requires explicitly enabling it, signifying awareness of the potential risks
- Being experimental, the feature can still be changed arbitrarily
- The feature can be *removed*
- The associated experimental feature flag is also removed
- The feature can be declared *stable*
- The associated experimental feature flag is removed
- There should be enough evidence of users having tried the feature, such as feedback, fixed bugs, demonstrations of how it is put to use
- Maintainers must feel confident that:
- The feature is designed and implemented sensibly, that it is fit for purpose
- Potential interactions are well-understood
- Stabilising the feature will not incur an outsized maintenance burden in the future
The following diagram illustrates the process:
```
.------.
| idea |
'------'
|
discussion, design, implementation
|
| .-------.
| | |
v v |
.--------------. review
| pull request | |
'--------------' |
| ^ | |
| | '-------'
.---' '----.
| |
merge user feedback,
| (breaking) changes
| |
'---. .----'
| |
v |
+--------------+
.---| experimental |----.
| +--------------+ |
| |
decision to stabilise decision against
| keeping the feature
| |
v v
+--------+ +---------+
| stable | | removed |
+--------+ +---------+
```
# Relation to the RFC process
Experimental features and [RFCs](https://github.com/NixOS/rfcs/) both allow approaching substantial changes while minimizing the risk.
However they serve different purposes:
- An experimental feature enables developers to iterate on and deliver a new idea without committing to it or requiring a costly long-running fork.
It is primarily an issue of *implementation*, targeting Nix developers and early testers.
- The goal of an RFC is to make explicit all the implications of a change:
Explain why it is wanted, which new use-cases it enables, which interface changes it requires, etc.
It is primarily an issue of *design* and *communication*, targeting the broader community.
This means that experimental features and RFCs are orthogonal mechanisms, and can be used independently or together as needed.

26
doc/manual/src/glossary.md
View file

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

17
doc/manual/src/release-notes/rl-next.md
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@ -39,3 +39,20 @@
* `man nix-store-<operation>` and `man nix-env-<operation>`
* `nix-store --help --<operation>` and `nix-env --help --<operation>`.
* Nix when used as a client now checks whether the store (the server) trusts the client.
(The store always had to check whether it trusts the client, but now the client is informed of the store's decision.)
This is useful for scripting interactions with (non-legacy-ssh) remote Nix stores.
`nix store ping` and `nix doctor` now display this information.
* A new command `nix derivation add` is created, to allow adding derivations to the store without involving the Nix language.
It exists to round out our collection of basic utility/plumbing commands, and allow for a low barrier-to-entry way of experimenting with alternative front-ends to the Nix Store.
It uses the same JSON layout as `nix show-derivation`, and is its inverse.
* `nix show-derivation` has been renamed to `nix derivation show`.
This matches `nix derivation add`, and avoids bloating the top-level namespace.
The old name is still kept as an alias for compatibility, however.
* The `nix derivation {add,show}` JSON format now includes the derivation name as a top-level field.
This is useful in general, but especially necessary for the `add` direction, as otherwise we would need to pass in the name out of band for certain cases.

4
flake.nix
View file

@ -472,8 +472,6 @@
};
in {
inherit nixpkgsFor;
# A Nixpkgs overlay that overrides the 'nix' and
# 'nix.perl-bindings' packages.
overlays.default = overlayFor (p: p.stdenv);
@ -583,6 +581,8 @@
tests.nix-copy-closure = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy-closure.nix;
tests.nix-copy = runNixOSTestFor "x86_64-linux" ./tests/nixos/nix-copy.nix;
tests.nssPreload = runNixOSTestFor "x86_64-linux" ./tests/nixos/nss-preload.nix;
tests.githubFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/github-flakes.nix;

4
local.mk
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@ -1,6 +1,8 @@
clean-files += Makefile.config
GLOBAL_CXXFLAGS += -Wno-deprecated-declarations
GLOBAL_CXXFLAGS += -Wno-deprecated-declarations -Werror=switch
# Allow switch-enum to be overridden for files that do not support it, usually because of dependency headers.
ERROR_SWITCH_ENUM = -Werror=switch-enum
$(foreach i, config.h $(wildcard src/lib*/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix, 0644)))

8
maintainers/README.md
View file

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

4
mk/patterns.mk
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@ -1,10 +1,10 @@
$(buildprefix)%.o: %.cc
@mkdir -p "$(dir $@)"
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(call filename-to-dep, $@) -MP
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) $(ERROR_SWITCH_ENUM) -MMD -MF $(call filename-to-dep, $@) -MP
$(buildprefix)%.o: %.cpp
@mkdir -p "$(dir $@)"
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(call filename-to-dep, $@) -MP
$(trace-cxx) $(CXX) -o $@ -c $< $(CPPFLAGS) $(GLOBAL_CXXFLAGS_PCH) $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) $(ERROR_SWITCH_ENUM) -MMD -MF $(call filename-to-dep, $@) -MP
$(buildprefix)%.o: %.c
@mkdir -p "$(dir $@)"

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

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

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

7
src/libcmd/editor-for.hh
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@ -1,11 +1,14 @@
#pragma once
///@file
#include "types.hh"
namespace nix {
/* Helper function to generate args that invoke $EDITOR on
filename:lineno. */
/**
* Helper function to generate args that invoke $EDITOR on
* filename:lineno.
*/
Strings editorFor(const Path & file, uint32_t line);
}

3
src/libcmd/installable-attr-path.hh
View file

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

1
src/libcmd/installable-derived-path.hh
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@ -1,4 +1,5 @@
#pragma once
///@file
#include "installables.hh"

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

1
src/libcmd/installable-value.hh
View file

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

22
src/libcmd/installables.cc
View file

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

1
src/libcmd/installables.hh
View file

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

1
src/libcmd/legacy.hh
View file

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

3
src/libcmd/markdown.hh
View file

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

4
src/libcmd/repl.cc
View file

@ -252,7 +252,9 @@ void NixRepl::mainLoop()
el_hist_size = 1000;
#endif
read_history(historyFile.c_str());
auto oldRepl = curRepl;
curRepl = this;
Finally restoreRepl([&] { curRepl = oldRepl; });
#ifndef READLINE
rl_set_complete_func(completionCallback);
rl_set_list_possib_func(listPossibleCallback);
@ -1024,6 +1026,8 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
str << v.fpoint;
break;
case nThunk:
case nExternal:
default:
str << ANSI_RED "«unknown»" ANSI_NORMAL;
break;

1
src/libcmd/repl.hh
View file

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

5
src/libexpr/attr-path.hh
View file

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

27
src/libexpr/attr-set.hh
View file

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

11
src/libexpr/eval-cache.hh
View file

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

5
src/libexpr/eval-inline.hh
View file

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

44
src/libexpr/eval.cc
View file

@ -173,7 +173,17 @@ void Value::print(const SymbolTable & symbols, std::ostream & str,
case tFloat:
str << fpoint;
break;
case tBlackhole:
// Although we know for sure that it's going to be an infinite recursion
// when this value is accessed _in the current context_, it's likely
// that the user will misinterpret a simpler «infinite recursion» output
// as a definitive statement about the value, while in fact it may be
// a valid value after `builtins.trace` and perhaps some other steps
// have completed.
str << "«potential infinite recursion»";
break;
default:
printError("Nix evaluator internal error: Value::print(): invalid value type %1%", internalType);
abort();
}
}
@ -229,6 +239,9 @@ std::string_view showType(ValueType type)
std::string showType(const Value & v)
{
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (v.internalType) {
case tString: return v.string.context ? "a string with context" : "a string";
case tPrimOp:
@ -242,16 +255,21 @@ std::string showType(const Value & v)
default:
return std::string(showType(v.type()));
}
#pragma GCC diagnostic pop
}
PosIdx Value::determinePos(const PosIdx pos) const
{
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (internalType) {
case tAttrs: return attrs->pos;
case tLambda: return lambda.fun->pos;
case tApp: return app.left->determinePos(pos);
default: return pos;
}
#pragma GCC diagnostic pop
}
bool Value::isTrivial() const
@ -326,6 +344,22 @@ static Symbol getName(const AttrName & name, EvalState & state, Env & env)
}
}
#if HAVE_BOEHMGC
/* Disable GC while this object lives. Used by CoroutineContext.
*
* Boehm keeps a count of GC_disable() and GC_enable() calls,
* and only enables GC when the count matches.
*/
class BoehmDisableGC {
public:
BoehmDisableGC() {
GC_disable();
};
~BoehmDisableGC() {
GC_enable();
};
};
#endif
static bool gcInitialised = false;
@ -350,6 +384,15 @@ void initGC()
StackAllocator::defaultAllocator = &boehmGCStackAllocator;
#if NIX_BOEHM_PATCH_VERSION != 1
printTalkative("Unpatched BoehmGC, disabling GC inside coroutines");
/* Used to disable GC when entering coroutines on macOS */
create_coro_gc_hook = []() -> std::shared_ptr<void> {
return std::make_shared<BoehmDisableGC>();
};
#endif
/* Set the initial heap size to something fairly big (25% of
physical RAM, up to a maximum of 384 MiB) so that in most cases
we don't need to garbage collect at all. (Collection has a
@ -2327,6 +2370,7 @@ bool EvalState::eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_v
case nFloat:
return v1.fpoint == v2.fpoint;
case nThunk: // Must not be left by forceValue
default:
error("cannot compare %1% with %2%", showType(v1), showType(v2)).withTrace(pos, errorCtx).debugThrow<EvalError>();
}

239
src/libexpr/eval.hh
View file

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

38
src/libexpr/flake/flake.cc
View file

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

114
src/libexpr/flake/flake.hh
View file

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

15
src/libexpr/flake/flakeref.hh
View file

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

21
src/libexpr/flake/lockfile.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "flakeref.hh"
@ -15,9 +16,11 @@ typedef std::vector<FlakeId> InputPath;
struct LockedNode;
/* A node in the lock file. It has outgoing edges to other nodes (its
inputs). Only the root node has this type; all other nodes have
type LockedNode. */
/**
* A node in the lock file. It has outgoing edges to other nodes (its
* inputs). Only the root node has this type; all other nodes have
* type LockedNode.
*/
struct Node : std::enable_shared_from_this<Node>
{
typedef std::variant<ref<LockedNode>, InputPath> Edge;
@ -27,7 +30,9 @@ struct Node : std::enable_shared_from_this<Node>
virtual ~Node() { }
};
/* A non-root node in the lock file. */
/**
* A non-root node in the lock file.
*/
struct LockedNode : Node
{
FlakeRef lockedRef, originalRef;
@ -62,7 +67,9 @@ struct LockFile
void write(const Path & path) const;
/* Check whether this lock file has any unlocked inputs. */
/**
* Check whether this lock file has any unlocked inputs.
*/
std::optional<FlakeRef> isUnlocked() const;
bool operator ==(const LockFile & other) const;
@ -73,7 +80,9 @@ struct LockFile
static std::string diff(const LockFile & oldLocks, const LockFile & newLocks);
/* Check that every 'follows' input target exists. */
/**
* Check that every 'follows' input target exists.
*/
void check();
};

1
src/libexpr/function-trace.hh
View file

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

23
src/libexpr/get-drvs.hh
View file

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

1
src/libexpr/json-to-value.hh
View file

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

2
src/libexpr/local.mk
View file

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

17
src/libexpr/nixexpr.hh
View file

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

4
src/libexpr/primops.cc
View file

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

17
src/libexpr/primops.hh
View file

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

27
src/libexpr/symbol-table.hh
View file

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

3
src/libexpr/tests/libexpr.hh
View file

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

1
src/libexpr/tests/value/context.hh
View file

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

1
src/libexpr/value-to-json.hh
View file

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

1
src/libexpr/value-to-xml.hh
View file

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

96
src/libexpr/value.hh
View file

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

39
src/libexpr/value/context.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "util.hh"
#include "comparator.hh"
@ -27,9 +28,10 @@ public:
class Store;
/* Plain opaque path to some store object.
Encoded as just the path: ‘<path>’.
/**
* Plain opaque path to some store object.
*
* Encoded as just the path: ‘<path>’.
*/
struct NixStringContextElem_Opaque {
StorePath path;
@ -37,13 +39,14 @@ struct NixStringContextElem_Opaque {
GENERATE_CMP(NixStringContextElem_Opaque, me->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>’.
/**
* 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;
@ -51,9 +54,10 @@ struct NixStringContextElem_DrvDeep {
GENERATE_CMP(NixStringContextElem_DrvDeep, me->drvPath);
};
/* Derivation output.
Encoded in the form ‘!<output>!<drvPath>’.
/**
* Derivation output.
*
* Encoded in the form ‘!<output>!<drvPath>’.
*/
struct NixStringContextElem_Built {
StorePath drvPath;
@ -83,10 +87,11 @@ struct NixStringContextElem : _NixStringContextElem_Raw {
return static_cast<Raw &>(*this);
}
/* Decode a context string, one of:
- ‘<path>’
- ‘=<path>’
- ‘!<name>!<path>’
/**
* 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;

1
src/libfetchers/attrs.hh
View file

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

1
src/libfetchers/cache.hh
View file

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

1
src/libfetchers/fetch-settings.hh
View file

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

42
src/libfetchers/fetchers.hh
View file

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

1
src/libfetchers/registry.hh
View file

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

1
src/libmain/common-args.hh
View file

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

1
src/libmain/loggers.hh
View file

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

15
src/libmain/progress-bar.cc
View file

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

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

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

61
src/libmain/shared.hh
View file

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

19
src/libstore/binary-cache-store.hh
View file

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

58
src/libstore/build-result.hh
View file

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

6
src/libstore/build/derivation-goal.cc
View file

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

175
src/libstore/build/derivation-goal.hh
View file

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

35
src/libstore/build/drv-output-substitution-goal.hh
View file

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

71
src/libstore/build/goal.hh
View file

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

17
src/libstore/build/hook-instance.hh
View file

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

5
src/libstore/build/local-derivation-goal.cc
View file

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

222
src/libstore/build/local-derivation-goal.hh
View file

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

1
src/libstore/build/personality.hh
View file

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

63
src/libstore/build/substitution-goal.hh
View file

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

187
src/libstore/build/worker.hh
View file

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

1
src/libstore/builtins.hh
View file

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

1
src/libstore/builtins/buildenv.hh
View file

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

1
src/libstore/content-address.hh
View file

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

17
src/libstore/crypto.hh
View file

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

9
src/libstore/daemon.cc
View file

@ -1032,6 +1032,15 @@ void processConnection(
if (GET_PROTOCOL_MINOR(clientVersion) >= 33)
to << nixVersion;
if (GET_PROTOCOL_MINOR(clientVersion) >= 35) {
// We and the underlying store both need to trust the client for
// it to be trusted.
auto temp = trusted
? store->isTrustedClient()
: std::optional { NotTrusted };
worker_proto::write(*store, to, temp);
}
/* Send startup error messages to the client. */
tunnelLogger->startWork();

2
src/libstore/daemon.hh
View file

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

169
src/libstore/derivations.cc
View file

@ -889,6 +889,67 @@ std::optional<BasicDerivation> Derivation::tryResolve(
return resolved;
}
void Derivation::checkInvariants(Store & store, const StorePath & drvPath) const
{
assert(drvPath.isDerivation());
std::string drvName(drvPath.name());
drvName = drvName.substr(0, drvName.size() - drvExtension.size());
if (drvName != name) {
throw Error("Derivation '%s' has name '%s' which does not match its path", store.printStorePath(drvPath), name);
}
auto envHasRightPath = [&](const StorePath & actual, const std::string & varName)
{
auto j = env.find(varName);
if (j == env.end() || store.parseStorePath(j->second) != actual)
throw Error("derivation '%s' has incorrect environment variable '%s', should be '%s'",
store.printStorePath(drvPath), varName, store.printStorePath(actual));
};
// Don't need the answer, but do this anyways to assert is proper
// combination. The code below is more general and naturally allows
// combinations that are currently prohibited.
type();
std::optional<DrvHash> hashesModulo;
for (auto & i : outputs) {
std::visit(overloaded {
[&](const DerivationOutput::InputAddressed & doia) {
if (!hashesModulo) {
// somewhat expensive so we do lazily
hashesModulo = hashDerivationModulo(store, *this, true);
}
auto currentOutputHash = get(hashesModulo->hashes, i.first);
if (!currentOutputHash)
throw Error("derivation '%s' has unexpected output '%s' (local-store / hashesModulo) named '%s'",
store.printStorePath(drvPath), store.printStorePath(doia.path), i.first);
StorePath recomputed = store.makeOutputPath(i.first, *currentOutputHash, drvName);
if (doia.path != recomputed)
throw Error("derivation '%s' has incorrect output '%s', should be '%s'",
store.printStorePath(drvPath), store.printStorePath(doia.path), store.printStorePath(recomputed));
envHasRightPath(doia.path, i.first);
},
[&](const DerivationOutput::CAFixed & dof) {
StorePath path = store.makeFixedOutputPath(drvName, { dof.hash, {} });
envHasRightPath(path, i.first);
},
[&](const DerivationOutput::CAFloating &) {
/* Nothing to check */
},
[&](const DerivationOutput::Deferred &) {
/* Nothing to check */
},
[&](const DerivationOutput::Impure &) {
/* Nothing to check */
},
}, i.second.raw());
}
}
const Hash impureOutputHash = hashString(htSHA256, "impure");
nlohmann::json DerivationOutput::toJSON(
@ -916,10 +977,79 @@ nlohmann::json DerivationOutput::toJSON(
return res;
}
DerivationOutput DerivationOutput::fromJSON(
const Store & store, std::string_view drvName, std::string_view outputName,
const nlohmann::json & _json)
{
std::set<std::string_view> keys;
auto json = (std::map<std::string, nlohmann::json>) _json;
for (const auto & [key, _] : json)
keys.insert(key);
auto methodAlgo = [&]() -> std::pair<FileIngestionMethod, HashType> {
std::string hashAlgo = json["hashAlgo"];
auto method = FileIngestionMethod::Flat;
if (hashAlgo.substr(0, 2) == "r:") {
method = FileIngestionMethod::Recursive;
hashAlgo = hashAlgo.substr(2);
}
auto hashType = parseHashType(hashAlgo);
return { method, hashType };
};
if (keys == (std::set<std::string_view> { "path" })) {
return DerivationOutput::InputAddressed {
.path = store.parseStorePath((std::string) json["path"]),
};
}
else if (keys == (std::set<std::string_view> { "path", "hashAlgo", "hash" })) {
auto [method, hashType] = methodAlgo();
auto dof = DerivationOutput::CAFixed {
.hash = {
.method = method,
.hash = Hash::parseNonSRIUnprefixed((std::string) json["hash"], hashType),
},
};
if (dof.path(store, drvName, outputName) != store.parseStorePath((std::string) json["path"]))
throw Error("Path doesn't match derivation output");
return dof;
}
else if (keys == (std::set<std::string_view> { "hashAlgo" })) {
auto [method, hashType] = methodAlgo();
return DerivationOutput::CAFloating {
.method = method,
.hashType = hashType,
};
}
else if (keys == (std::set<std::string_view> { })) {
return DerivationOutput::Deferred {};
}
else if (keys == (std::set<std::string_view> { "hashAlgo", "impure" })) {
auto [method, hashType] = methodAlgo();
return DerivationOutput::Impure {
.method = method,
.hashType = hashType,
};
}
else {
throw Error("invalid JSON for derivation output");
}
}
nlohmann::json Derivation::toJSON(const Store & store) const
{
nlohmann::json res = nlohmann::json::object();
res["name"] = name;
{
nlohmann::json & outputsObj = res["outputs"];
outputsObj = nlohmann::json::object();
@ -950,4 +1080,43 @@ nlohmann::json Derivation::toJSON(const Store & store) const
return res;
}
Derivation Derivation::fromJSON(
const Store & store,
const nlohmann::json & json)
{
Derivation res;
res.name = json["name"];
{
auto & outputsObj = json["outputs"];
for (auto & [outputName, output] : outputsObj.items()) {
res.outputs.insert_or_assign(
outputName,
DerivationOutput::fromJSON(store, res.name, outputName, output));
}
}
{
auto & inputsList = json["inputSrcs"];
for (auto & input : inputsList)
res.inputSrcs.insert(store.parseStorePath(static_cast<const std::string &>(input)));
}
{
auto & inputDrvsObj = json["inputDrvs"];
for (auto & [inputDrvPath, inputOutputs] : inputDrvsObj.items())
res.inputDrvs[store.parseStorePath(inputDrvPath)] =
static_cast<const StringSet &>(inputOutputs);
}
res.platform = json["system"];
res.builder = json["builder"];
res.args = json["args"];
res.env = json["env"];
return res;
}
}

59
src/libstore/derivations.hh
View file

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

1
src/libstore/derived-path.hh
View file

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

8
src/libstore/dummy-store.cc
View file

@ -39,6 +39,14 @@ struct DummyStore : public virtual DummyStoreConfig, public virtual Store
callback(nullptr);
}
/**
* The dummy store is incapable of *not* trusting! :)
*/
virtual std::optional<TrustedFlag> isTrustedClient() override
{
return Trusted;
}
static std::set<std::string> uriSchemes() {
return {"dummy"};
}

5
src/libstore/filetransfer.cc
View file

@ -407,6 +407,10 @@ struct curlFileTransfer : public FileTransfer
err = Misc;
} else {
// Don't bother retrying on certain cURL errors either
// Allow selecting a subset of enum values
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (code) {
case CURLE_FAILED_INIT:
case CURLE_URL_MALFORMAT:
@ -427,6 +431,7 @@ struct curlFileTransfer : public FileTransfer
default: // Shut up warnings
break;
}
#pragma GCC diagnostic pop
}
attempt++;

40
src/libstore/filetransfer.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "types.hh"
#include "hash.hh"
@ -87,39 +88,56 @@ struct FileTransfer
{
virtual ~FileTransfer() { }
/* Enqueue a data transfer request, returning a future to the result of
the download. The future may throw a FileTransferError
exception. */
/**
* Enqueue a data transfer request, returning a future to the result of
* the download. The future may throw a FileTransferError
* exception.
*/
virtual void enqueueFileTransfer(const FileTransferRequest & request,
Callback<FileTransferResult> callback) = 0;
std::future<FileTransferResult> enqueueFileTransfer(const FileTransferRequest & request);
/* Synchronously download a file. */
/**
* Synchronously download a file.
*/
FileTransferResult download(const FileTransferRequest & request);
/* Synchronously upload a file. */
/**
* Synchronously upload a file.
*/
FileTransferResult upload(const FileTransferRequest & request);
/* Download a file, writing its data to a sink. The sink will be
invoked on the thread of the caller. */
/**
* Download a file, writing its data to a sink. The sink will be
* invoked on the thread of the caller.
*/
void download(FileTransferRequest && request, Sink & sink);
enum Error { NotFound, Forbidden, Misc, Transient, Interrupted };
};
/* Return a shared FileTransfer object. Using this object is preferred
because it enables connection reuse and HTTP/2 multiplexing. */
/**
* @return a shared FileTransfer object.
*
* Using this object is preferred because it enables connection reuse
* and HTTP/2 multiplexing.
*/
ref<FileTransfer> getFileTransfer();
/* Return a new FileTransfer object. */
/**
* @return a new FileTransfer object
*
* Prefer getFileTransfer() to this; see its docs for why.
*/
ref<FileTransfer> makeFileTransfer();
class FileTransferError : public Error
{
public:
FileTransfer::Error error;
std::optional<std::string> response; // intentionally optional
/// intentionally optional
std::optional<std::string> response;
template<typename... Args>
FileTransferError(FileTransfer::Error error, std::optional<std::string> response, const Args & ... args);

18
src/libstore/fs-accessor.hh
View file

@ -1,11 +1,14 @@
#pragma once
///@file
#include "types.hh"
namespace nix {
/* An abstract class for accessing a filesystem-like structure, such
as a (possibly remote) Nix store or the contents of a NAR file. */
/**
* An abstract class for accessing a filesystem-like structure, such
* as a (possibly remote) Nix store or the contents of a NAR file.
*/
class FSAccessor
{
public:
@ -14,8 +17,17 @@ public:
struct Stat
{
Type type = tMissing;
uint64_t fileSize = 0; // regular files only
/**
* regular files only
*/
uint64_t fileSize = 0;
/**
* regular files only
*/
bool isExecutable = false; // regular files only
/**
* regular files only
*/
uint64_t narOffset = 0; // regular files only
};

84
src/libstore/gc-store.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "store-api.hh"
@ -11,18 +12,19 @@ typedef std::unordered_map<StorePath, std::unordered_set<std::string>> Roots;
struct GCOptions
{
/* Garbage collector operation:
- `gcReturnLive': return the set of paths reachable from
(i.e. in the closure of) the roots.
- `gcReturnDead': return the set of paths not reachable from
the roots.
- `gcDeleteDead': actually delete the latter set.
- `gcDeleteSpecific': delete the paths listed in
`pathsToDelete', insofar as they are not reachable.
/**
* Garbage collector operation:
*
* - `gcReturnLive`: return the set of paths reachable from
* (i.e. in the closure of) the roots.
*
* - `gcReturnDead`: return the set of paths not reachable from
* the roots.
*
* - `gcDeleteDead`: actually delete the latter set.
*
* - `gcDeleteSpecific`: delete the paths listed in
* `pathsToDelete`, insofar as they are not reachable.
*/
typedef enum {
gcReturnLive,
@ -33,28 +35,38 @@ struct GCOptions
GCAction action{gcDeleteDead};
/* If `ignoreLiveness' is set, then reachability from the roots is
ignored (dangerous!). However, the paths must still be
unreferenced *within* the store (i.e., there can be no other
store paths that depend on them). */
/**
* If `ignoreLiveness` is set, then reachability from the roots is
* ignored (dangerous!). However, the paths must still be
* unreferenced *within* the store (i.e., there can be no other
* store paths that depend on them).
*/
bool ignoreLiveness{false};
/* For `gcDeleteSpecific', the paths to delete. */
/**
* For `gcDeleteSpecific`, the paths to delete.
*/
StorePathSet pathsToDelete;
/* Stop after at least `maxFreed' bytes have been freed. */
/**
* Stop after at least `maxFreed` bytes have been freed.
*/
uint64_t maxFreed{std::numeric_limits<uint64_t>::max()};
};
struct GCResults
{
/* Depending on the action, the GC roots, or the paths that would
be or have been deleted. */
/**
* Depending on the action, the GC roots, or the paths that would
* be or have been deleted.
*/
PathSet paths;
/* For `gcReturnDead', `gcDeleteDead' and `gcDeleteSpecific', the
number of bytes that would be or was freed. */
/**
* For `gcReturnDead`, `gcDeleteDead` and `gcDeleteSpecific`, the
* number of bytes that would be or was freed.
*/
uint64_t bytesFreed = 0;
};
@ -63,21 +75,27 @@ struct GcStore : public virtual Store
{
inline static std::string operationName = "Garbage collection";
/* Add an indirect root, which is merely a symlink to `path' from
/nix/var/nix/gcroots/auto/<hash of `path'>. `path' is supposed
to be a symlink to a store path. The garbage collector will
automatically remove the indirect root when it finds that
`path' has disappeared. */
/**
* Add an indirect root, which is merely a symlink to `path` from
* `/nix/var/nix/gcroots/auto/<hash of path>`. `path` is supposed
* to be a symlink to a store path. The garbage collector will
* automatically remove the indirect root when it finds that
* `path` has disappeared.
*/
virtual void addIndirectRoot(const Path & path) = 0;
/* Find the roots of the garbage collector. Each root is a pair
(link, storepath) where `link' is the path of the symlink
outside of the Nix store that point to `storePath'. If
'censor' is true, privacy-sensitive information about roots
found in /proc is censored. */
/**
* Find the roots of the garbage collector. Each root is a pair
* `(link, storepath)` where `link` is the path of the symlink
* outside of the Nix store that point to `storePath`. If
* `censor` is true, privacy-sensitive information about roots
* found in `/proc` is censored.
*/
virtual Roots findRoots(bool censor) = 0;
/* Perform a garbage collection. */
/**
* Perform a garbage collection.
*/
virtual void collectGarbage(const GCOptions & options, GCResults & results) = 0;
};

65
src/libstore/globals.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "types.hh"
#include "config.hh"
@ -71,30 +72,46 @@ public:
Path nixPrefix;
/* The directory where we store sources and derived files. */
/**
* The directory where we store sources and derived files.
*/
Path nixStore;
Path nixDataDir; /* !!! fix */
/* The directory where we log various operations. */
/**
* The directory where we log various operations.
*/
Path nixLogDir;
/* The directory where state is stored. */
/**
* The directory where state is stored.
*/
Path nixStateDir;
/* The directory where system configuration files are stored. */
/**
* The directory where system configuration files are stored.
*/
Path nixConfDir;
/* A list of user configuration files to load. */
/**
* A list of user configuration files to load.
*/
std::vector<Path> nixUserConfFiles;
/* The directory where the main programs are stored. */
/**
* The directory where the main programs are stored.
*/
Path nixBinDir;
/* The directory where the man pages are stored. */
/**
* The directory where the man pages are stored.
*/
Path nixManDir;
/* File name of the socket the daemon listens to. */
/**
* File name of the socket the daemon listens to.
*/
Path nixDaemonSocketFile;
Setting<std::string> storeUri{this, getEnv("NIX_REMOTE").value_or("auto"), "store",
@ -120,7 +137,9 @@ public:
)",
{"build-fallback"}};
/* Whether to show build log output in real time. */
/**
* Whether to show build log output in real time.
*/
bool verboseBuild = true;
Setting<size_t> logLines{this, 10, "log-lines",
@ -156,8 +175,10 @@ public:
)",
{"build-cores"}, false};
/* Read-only mode. Don't copy stuff to the store, don't change
the database. */
/**
* Read-only mode. Don't copy stuff to the store, don't change
* the database.
*/
bool readOnlyMode = false;
Setting<std::string> thisSystem{
@ -457,7 +478,9 @@ public:
)",
{"env-keep-derivations"}};
/* Whether to lock the Nix client and worker to the same CPU. */
/**
* Whether to lock the Nix client and worker to the same CPU.
*/
bool lockCPU;
Setting<SandboxMode> sandboxMode{
@ -996,8 +1019,10 @@ public:
// FIXME: don't use a global variable.
extern Settings settings;
/* This should be called after settings are initialized, but before
anything else */
/**
* This should be called after settings are initialized, but before
* anything else
*/
void initPlugins();
void loadConfFile();
@ -1007,12 +1032,16 @@ std::vector<Path> getUserConfigFiles();
extern const std::string nixVersion;
/* NB: This is not sufficient. You need to call initNix() */
/**
* NB: This is not sufficient. You need to call initNix()
*/
void initLibStore();
/* It's important to initialize before doing _anything_, which is why we
call upon the programmer to handle this correctly. However, we only add
this in a key locations, so as not to litter the code. */
/**
* It's important to initialize before doing _anything_, which is why we
* call upon the programmer to handle this correctly. However, we only add
* this in a key locations, so as not to litter the code.
*/
void assertLibStoreInitialized();
}

12
src/libstore/http-binary-cache-store.cc
View file

@ -194,6 +194,18 @@ protected:
}});
}
/**
* This isn't actually necessary read only. We support "upsert" now, so we
* have a notion of authentication via HTTP POST/PUT.
*
* For now, we conservatively say we don't know.
*
* \todo try to expose our HTTP authentication status.
*/
std::optional<TrustedFlag> isTrustedClient() override
{
return std::nullopt;
}
};
static RegisterStoreImplementation<HttpBinaryCacheStore, HttpBinaryCacheStoreConfig> regHttpBinaryCacheStore;

9
src/libstore/legacy-ssh-store.cc
View file

@ -389,6 +389,15 @@ public:
return conn->remoteVersion;
}
/**
* The legacy ssh protocol doesn't support checking for trusted-user.
* Try using ssh-ng:// instead if you want to know.
*/
std::optional<TrustedFlag> isTrustedClient() override
{
return std::nullopt;
}
void queryRealisationUncached(const DrvOutput &,
Callback<std::shared_ptr<const Realisation>> callback) noexcept override
// TODO: Implement

4
src/libstore/local-binary-cache-store.cc
View file

@ -95,6 +95,10 @@ protected:
return paths;
}
std::optional<TrustedFlag> isTrustedClient() override
{
return Trusted;
}
};
void LocalBinaryCacheStore::init()

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

@ -1,4 +1,5 @@
#pragma once
///@file
#include "store-api.hh"
#include "gc-store.hh"
@ -47,7 +48,9 @@ public:
void narFromPath(const StorePath & path, Sink & sink) override;
ref<FSAccessor> getFSAccessor() override;
/* Register a permanent GC root. */
/**
* Register a permanent GC root.
*/
Path addPermRoot(const StorePath & storePath, const Path & gcRoot);
virtual Path getRealStoreDir() { return realStoreDir; }

116
src/libstore/local-store.cc
View file

@ -711,61 +711,6 @@ void canonicalisePathMetaData(const Path & path,
}
void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivation & drv)
{
assert(drvPath.isDerivation());
std::string drvName(drvPath.name());
drvName = drvName.substr(0, drvName.size() - drvExtension.size());
auto envHasRightPath = [&](const StorePath & actual, const std::string & varName)
{
auto j = drv.env.find(varName);
if (j == drv.env.end() || parseStorePath(j->second) != actual)
throw Error("derivation '%s' has incorrect environment variable '%s', should be '%s'",
printStorePath(drvPath), varName, printStorePath(actual));
};
// Don't need the answer, but do this anyways to assert is proper
// combination. The code below is more general and naturally allows
// combinations that are currently prohibited.
drv.type();
std::optional<DrvHash> hashesModulo;
for (auto & i : drv.outputs) {
std::visit(overloaded {
[&](const DerivationOutput::InputAddressed & doia) {
if (!hashesModulo) {
// somewhat expensive so we do lazily
hashesModulo = hashDerivationModulo(*this, drv, true);
}
auto currentOutputHash = get(hashesModulo->hashes, i.first);
if (!currentOutputHash)
throw Error("derivation '%s' has unexpected output '%s' (local-store / hashesModulo) named '%s'",
printStorePath(drvPath), printStorePath(doia.path), i.first);
StorePath recomputed = makeOutputPath(i.first, *currentOutputHash, drvName);
if (doia.path != recomputed)
throw Error("derivation '%s' has incorrect output '%s', should be '%s'",
printStorePath(drvPath), printStorePath(doia.path), printStorePath(recomputed));
envHasRightPath(doia.path, i.first);
},
[&](const DerivationOutput::CAFixed & dof) {
StorePath path = makeFixedOutputPath(drvName, { dof.hash, {} });
envHasRightPath(path, i.first);
},
[&](const DerivationOutput::CAFloating &) {
/* Nothing to check */
},
[&](const DerivationOutput::Deferred &) {
/* Nothing to check */
},
[&](const DerivationOutput::Impure &) {
/* Nothing to check */
},
}, i.second.raw());
}
}
void LocalStore::registerDrvOutput(const Realisation & info, CheckSigsFlag checkSigs)
{
experimentalFeatureSettings.require(Xp::CaDerivations);
@ -876,7 +821,7 @@ uint64_t LocalStore::addValidPath(State & state,
derivations). Note that if this throws an error, then the
DB transaction is rolled back, so the path validity
registration above is undone. */
if (checkOutputs) checkDerivationOutputs(info.path, drv);
if (checkOutputs) drv.checkInvariants(*this, info.path);
for (auto & i : drv.outputsAndOptPaths(*this)) {
/* Floating CA derivations have indeterminate output paths until
@ -1134,57 +1079,6 @@ StorePathSet LocalStore::querySubstitutablePaths(const StorePathSet & paths)
}
// FIXME: move this, it's not specific to LocalStore.
void LocalStore::querySubstitutablePathInfos(const StorePathCAMap & paths, SubstitutablePathInfos & infos)
{
if (!settings.useSubstitutes) return;
for (auto & sub : getDefaultSubstituters()) {
for (auto & path : paths) {
if (infos.count(path.first))
// Choose first succeeding substituter.
continue;
auto subPath(path.first);
// Recompute store path so that we can use a different store root.
if (path.second) {
subPath = makeFixedOutputPathFromCA(
path.first.name(),
ContentAddressWithReferences::withoutRefs(*path.second));
if (sub->storeDir == storeDir)
assert(subPath == path.first);
if (subPath != path.first)
debug("replaced path '%s' with '%s' for substituter '%s'", printStorePath(path.first), sub->printStorePath(subPath), sub->getUri());
} else if (sub->storeDir != storeDir) continue;
debug("checking substituter '%s' for path '%s'", sub->getUri(), sub->printStorePath(subPath));
try {
auto info = sub->queryPathInfo(subPath);
if (sub->storeDir != storeDir && !(info->isContentAddressed(*sub) && info->references.empty()))
continue;
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
std::shared_ptr<const ValidPathInfo>(info));
infos.insert_or_assign(path.first, SubstitutablePathInfo{
.deriver = info->deriver,
.references = info->references,
.downloadSize = narInfo ? narInfo->fileSize : 0,
.narSize = info->narSize,
});
} catch (InvalidPath &) {
} catch (SubstituterDisabled &) {
} catch (Error & e) {
if (settings.tryFallback)
logError(e.info());
else
throw;
}
}
}
}
void LocalStore::registerValidPath(const ValidPathInfo & info)
{
registerValidPaths({{info.path, info}});
@ -1226,8 +1120,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
for (auto & [_, i] : infos)
if (i.path.isDerivation()) {
// FIXME: inefficient; we already loaded the derivation in addValidPath().
checkDerivationOutputs(i.path,
readInvalidDerivation(i.path));
readInvalidDerivation(i.path).checkInvariants(*this, i.path);
}
/* Do a topological sort of the paths. This will throw an
@ -1753,6 +1646,11 @@ unsigned int LocalStore::getProtocol()
return PROTOCOL_VERSION;
}
std::optional<TrustedFlag> LocalStore::isTrustedClient()
{
return Trusted;
}
#if defined(FS_IOC_SETFLAGS) && defined(FS_IOC_GETFLAGS) && defined(FS_IMMUTABLE_FL)

151
src/libstore/local-store.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "sqlite.hh"
@ -18,10 +19,14 @@
namespace nix {
/* Nix store and database schema version. Version 1 (or 0) was Nix <=
0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.16. Version 6 is
Nix 1.0. Version 7 is Nix 1.3. Version 10 is 2.0. */
/**
* Nix store and database schema version.
*
* Version 1 (or 0) was Nix <=
* 0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
* Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.16. Version 6 is
* Nix 1.0. Version 7 is Nix 1.3. Version 10 is 2.0.
*/
const int nixSchemaVersion = 10;
@ -50,30 +55,40 @@ class LocalStore : public virtual LocalStoreConfig, public virtual LocalFSStore,
{
private:
/* Lock file used for upgrading. */
/**
* Lock file used for upgrading.
*/
AutoCloseFD globalLock;
struct State
{
/* The SQLite database object. */
/**
* The SQLite database object.
*/
SQLite db;
struct Stmts;
std::unique_ptr<Stmts> stmts;
/* The last time we checked whether to do an auto-GC, or an
auto-GC finished. */
/**
* 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;
/* Whether auto-GC is running. If so, get gcFuture to wait for
the GC to finish. */
/**
* Whether auto-GC is running. If so, get gcFuture to wait for
* the GC to finish.
*/
bool gcRunning = false;
std::shared_future<void> gcFuture;
/* How much disk space was available after the previous
auto-GC. If the current available disk space is below
minFree but not much below availAfterGC, then there is no
point in starting a new GC. */
/**
* How much disk space was available after the previous
* auto-GC. If the current available disk space is below
* minFree but not much below availAfterGC, then there is no
* point in starting a new GC.
*/
uint64_t availAfterGC = std::numeric_limits<uint64_t>::max();
std::unique_ptr<PublicKeys> publicKeys;
@ -96,11 +111,15 @@ private:
public:
// Hack for build-remote.cc.
/**
* Hack for build-remote.cc.
*/
PathSet locksHeld;
/* Initialise the local store, upgrading the schema if
necessary. */
/**
* Initialise the local store, upgrading the schema if
* necessary.
*/
LocalStore(const Params & params);
LocalStore(std::string scheme, std::string path, const Params & params);
@ -109,7 +128,9 @@ public:
static std::set<std::string> uriSchemes()
{ return {}; }
/* Implementations of abstract store API methods. */
/**
* Implementations of abstract store API methods.
*/
std::string getUri() override;
@ -133,9 +154,6 @@ public:
StorePathSet querySubstitutablePaths(const StorePathSet & paths) override;
void querySubstitutablePathInfos(const StorePathCAMap & paths,
SubstitutablePathInfos & infos) override;
bool pathInfoIsUntrusted(const ValidPathInfo &) override;
bool realisationIsUntrusted(const Realisation & ) override;
@ -157,13 +175,19 @@ private:
void createTempRootsFile();
/* The file to which we write our temporary roots. */
/**
* The file to which we write our temporary roots.
*/
Sync<AutoCloseFD> _fdTempRoots;
/* The global GC lock. */
/**
* The global GC lock.
*/
Sync<AutoCloseFD> _fdGCLock;
/* Connection to the garbage collector. */
/**
* Connection to the garbage collector.
*/
Sync<AutoCloseFD> _fdRootsSocket;
public:
@ -182,42 +206,54 @@ public:
void collectGarbage(const GCOptions & options, GCResults & results) override;
/* Optimise the disk space usage of the Nix store by hard-linking
files with the same contents. */
/**
* Optimise the disk space usage of the Nix store by hard-linking
* files with the same contents.
*/
void optimiseStore(OptimiseStats & stats);
void optimiseStore() override;
/* Optimise a single store path. Optionally, test the encountered
symlinks for corruption. */
/**
* Optimise a single store path. Optionally, test the encountered
* symlinks for corruption.
*/
void optimisePath(const Path & path, RepairFlag repair);
bool verifyStore(bool checkContents, RepairFlag repair) override;
/* Register the validity of a path, i.e., that `path' exists, that
the paths referenced by it exists, and in the case of an output
path of a derivation, that it has been produced by a successful
execution of the derivation (or something equivalent). Also
register the hash of the file system contents of the path. The
hash must be a SHA-256 hash. */
/**
* Register the validity of a path, i.e., that `path` exists, that
* the paths referenced by it exists, and in the case of an output
* path of a derivation, that it has been produced by a successful
* execution of the derivation (or something equivalent). Also
* register the hash of the file system contents of the path. The
* hash must be a SHA-256 hash.
*/
void registerValidPath(const ValidPathInfo & info);
void registerValidPaths(const ValidPathInfos & infos);
unsigned int getProtocol() override;
std::optional<TrustedFlag> isTrustedClient() override;
void vacuumDB();
void repairPath(const StorePath & path) override;
void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
/* If free disk space in /nix/store if below minFree, delete
garbage until it exceeds maxFree. */
/**
* If free disk space in /nix/store if below minFree, delete
* garbage until it exceeds maxFree.
*/
void autoGC(bool sync = true);
/* Register the store path 'output' as the output named 'outputName' of
derivation 'deriver'. */
/**
* Register the store path 'output' as the output named 'outputName' of
* derivation 'deriver'.
*/
void registerDrvOutput(const Realisation & info) override;
void registerDrvOutput(const Realisation & info, CheckSigsFlag checkSigs) override;
void cacheDrvOutputMapping(
@ -247,7 +283,9 @@ private:
void invalidatePath(State & state, const StorePath & path);
/* Delete a path from the Nix store. */
/**
* Delete a path from the Nix store.
*/
void invalidatePathChecked(const StorePath & path);
void verifyPath(const Path & path, const StringSet & store,
@ -270,8 +308,6 @@ private:
std::pair<Path, AutoCloseFD> createTempDirInStore();
void checkDerivationOutputs(const StorePath & drvPath, const Derivation & drv);
typedef std::unordered_set<ino_t> InodeHash;
InodeHash loadInodeHash();
@ -282,8 +318,10 @@ private:
bool isValidPath_(State & state, const StorePath & path);
void queryReferrers(State & state, const StorePath & path, StorePathSet & referrers);
/* Add signatures to a ValidPathInfo or Realisation using the secret keys
specified by the ‘secret-key-files’ option. */
/**
* Add signatures to a ValidPathInfo or Realisation using the secret keys
* specified by the ‘secret-key-files’ option.
*/
void signPathInfo(ValidPathInfo & info);
void signRealisation(Realisation &);
@ -313,17 +351,22 @@ typedef std::pair<dev_t, ino_t> Inode;
typedef std::set<Inode> InodesSeen;
/* "Fix", or canonicalise, the meta-data of the files in a store path
after it has been built. In particular:
- the last modification date on each file is set to 1 (i.e.,
00:00:01 1/1/1970 UTC)
- the permissions are set of 444 or 555 (i.e., read-only with or
without execute permission; setuid bits etc. are cleared)
- the owner and group are set to the Nix user and group, if we're
running as root.
If uidRange is not empty, this function will throw an error if it
encounters files owned by a user outside of the closed interval
[uidRange->first, uidRange->second].
/**
* "Fix", or canonicalise, the meta-data of the files in a store path
* after it has been built. In particular:
*
* - the last modification date on each file is set to 1 (i.e.,
* 00:00:01 1/1/1970 UTC)
*
* - the permissions are set of 444 or 555 (i.e., read-only with or
* without execute permission; setuid bits etc. are cleared)
*
* - the owner and group are set to the Nix user and group, if we're
* running as root.
*
* If uidRange is not empty, this function will throw an error if it
* encounters files owned by a user outside of the closed interval
* [uidRange->first, uidRange->second].
*/
void canonicalisePathMetaData(
const Path & path,

15
src/libstore/lock.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "types.hh"
@ -12,14 +13,18 @@ struct UserLock
{
virtual ~UserLock() { }
/* Get the first and last UID. */
/**
* Get the first and last UID.
*/
std::pair<uid_t, uid_t> getUIDRange()
{
auto first = getUID();
return {first, first + getUIDCount() - 1};
}
/* Get the first UID. */
/**
* Get the first UID.
*/
virtual uid_t getUID() = 0;
virtual uid_t getUIDCount() = 0;
@ -29,8 +34,10 @@ struct UserLock
virtual std::vector<gid_t> getSupplementaryGIDs() = 0;
};
/* Acquire a user lock for a UID range of size `nrIds`. Note that this
may return nullptr if no user is available. */
/**
* 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 useUserNamespace);
bool useBuildUsers();

7
src/libstore/log-store.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "store-api.hh"
@ -9,8 +10,10 @@ struct LogStore : public virtual Store
{
inline static std::string operationName = "Build log storage and retrieval";
/* Return the build log of the specified store path, if available,
or null otherwise. */
/**
* Return the build log of the specified store path, if available,
* or null otherwise.
*/
std::optional<std::string> getBuildLog(const StorePath & path);
virtual std::optional<std::string> getBuildLogExact(const StorePath & path) = 0;

1
src/libstore/machines.hh
View file

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

1
src/libstore/make-content-addressed.hh
View file

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

1
src/libstore/names.hh
View file

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

1
src/libstore/nar-accessor.cc
View file

@ -275,6 +275,7 @@ json listNar(ref<FSAccessor> accessor, const Path & path, bool recurse)
obj["type"] = "symlink";
obj["target"] = accessor->readLink(path);
break;
case FSAccessor::Type::tMissing:
default:
throw Error("path '%s' does not exist in NAR", path);
}

23
src/libstore/nar-accessor.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include <functional>
@ -9,24 +10,30 @@ namespace nix {
struct Source;
/* Return an object that provides access to the contents of a NAR
file. */
/**
* Return an object that provides access to the contents of a NAR
* file.
*/
ref<FSAccessor> makeNarAccessor(std::string && nar);
ref<FSAccessor> makeNarAccessor(Source & source);
/* Create a NAR accessor from a NAR listing (in the format produced by
listNar()). The callback getNarBytes(offset, length) is used by the
readFile() method of the accessor to get the contents of files
inside the NAR. */
/**
* Create a NAR accessor from a NAR listing (in the format produced by
* listNar()). The callback getNarBytes(offset, length) is used by the
* readFile() method of the accessor to get the contents of files
* inside the NAR.
*/
typedef std::function<std::string(uint64_t, uint64_t)> GetNarBytes;
ref<FSAccessor> makeLazyNarAccessor(
const std::string & listing,
GetNarBytes getNarBytes);
/* Write a JSON representation of the contents of a NAR (except file
contents). */
/**
* Write a JSON representation of the contents of a NAR (except file
* contents).
*/
nlohmann::json listNar(ref<FSAccessor> accessor, const Path & path, bool recurse);
}

7
src/libstore/nar-info-disk-cache.hh
View file

@ -1,4 +1,5 @@
#pragma once
///@file
#include "ref.hh"
#include "nar-info.hh"
@ -42,8 +43,10 @@ public:
const std::string & uri, const DrvOutput & id) = 0;
};
/* Return a singleton cache object that can be used concurrently by
multiple threads. */
/**
* Return a singleton cache object that can be used concurrently by
* multiple threads.
*/
ref<NarInfoDiskCache> getNarInfoDiskCache();
ref<NarInfoDiskCache> getTestNarInfoDiskCache(Path dbPath);

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