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Implement getFingerprint() for store paths

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This commit is contained in:
Eelco Dolstra 2024-03-04 19:21:31 +01:00
parent eaa6c26189
commit 29049d2653
1 changed files with 14 additions and 0 deletions
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14
src/libfetchers/path.cc
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@ -147,6 +147,20 @@ struct PathInputScheme : InputScheme
return {std::move(*storePath), input}; 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 std::optional<ExperimentalFeature> experimentalFeature() const override
{ {
return Xp::Flakes; return Xp::Flakes;