wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-06-29 02:11:15 +02:00
Code Activity

Persistently cache InputAccessor::fetchToStore()

Browse source 
This avoids repeated copying of the same source tree between Nix
invocations. It requires the accessor to have a "fingerprint" (e.g. a
Git revision) that uniquely determines its contents.
This commit is contained in:
Eelco Dolstra 2023-11-20 20:04:37 +01:00
parent f450c8773c
commit 99d5204baa
8 changed files with 77 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/libfetchers/git.cc
View file

@ -700,10 +700,22 @@ struct GitInputScheme : InputScheme
auto repoInfo = getRepoInfo(input);
return
auto [accessor, final] =
input.getRef() || input.getRev() || !repoInfo.isLocal
? getAccessorFromCommit(store, repoInfo, std::move(input))
: getAccessorFromWorkdir(store, repoInfo, std::move(input));
accessor->fingerprint = final.getFingerprint(store);
return {accessor, std::move(final)};
}
std::optional<std::string> getFingerprint(ref<Store> store, const Input & input) const override
{
if (auto rev = input.getRev())
return rev->gitRev() + (getSubmodulesAttr(input) ? ";s" : "");
else
return std::nullopt;
}
};