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Merge pull request #10149 from edolstra/use-flake-fingerprint

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LockedFlake::getFingerprint(): Use Input::getFingerprint()
This commit is contained in:
Eelco Dolstra 2024-03-07 10:18:19 +01:00 committed by GitHub
commit 38b79da100
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4 changed files with 24 additions and 11 deletions
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4
src/libcmd/installables.cc
View File

@ -443,10 +443,10 @@ ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake)
{
auto fingerprint = lockedFlake->getFingerprint();
auto fingerprint = lockedFlake->getFingerprint(state.store);
return make_ref<nix::eval_cache::EvalCache>(
evalSettings.useEvalCache && evalSettings.pureEval
? std::optional { std::cref(fingerprint) }
? fingerprint
: std::nullopt,
state,
[&state, lockedFlake]()

15
src/libexpr/flake/flake.cc
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@ -926,18 +926,17 @@ static RegisterPrimOp r4({
}
Fingerprint LockedFlake::getFingerprint() const
std::optional<Fingerprint> LockedFlake::getFingerprint(ref<Store> store) const
{
if (lockFile.isUnlocked()) return std::nullopt;
auto fingerprint = flake.lockedRef.input.getFingerprint(store);
if (!fingerprint) return std::nullopt;
// FIXME: as an optimization, if the flake contains a lock file
// and we haven't changed it, then it's sufficient to use
// flake.sourceInfo.storePath for the fingerprint.
return hashString(HashAlgorithm::SHA256,
fmt("%s;%s;%d;%d;%s",
flake.path.to_string(),
flake.lockedRef.subdir,
flake.lockedRef.input.getRevCount().value_or(0),
flake.lockedRef.input.getLastModified().value_or(0),
lockFile));
return hashString(HashAlgorithm::SHA256, fmt("%s;%s;%s", *fingerprint, flake.lockedRef.subdir, lockFile));
}
Flake::~Flake() { }

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

@ -119,7 +119,7 @@ struct LockedFlake
*/
std::map<ref<Node>, SourcePath> nodePaths;
Fingerprint getFingerprint() const;
std::optional<Fingerprint> getFingerprint(ref<Store> store) const;
};
struct LockFlags

14
src/libfetchers/path.cc
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@ -147,6 +147,20 @@ struct PathInputScheme : InputScheme
return {std::move(*storePath), input};
}
std::optional<std::string> getFingerprint(ref<Store> store, const Input & input) const override
{
/* If this path is in the Nix store, use the hash of the
store object and the subpath. */
auto path = getAbsPath(input);
try {
auto [storePath, subPath] = store->toStorePath(path.abs());
auto info = store->queryPathInfo(storePath);
return fmt("path:%s:%s", info->narHash.to_string(HashFormat::Base16, false), subPath);
} catch (Error &) {
return std::nullopt;
}
}
std::optional<ExperimentalFeature> experimentalFeature() const override
{
return Xp::Flakes;