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Git fetcher: Don't update mtime of ref file if fetching by rev

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This fixes the warning

  $ nix eval --store /tmp/nix --expr 'builtins.fetchTree { type = "git"; url = "https://github.com/DeterminateSystems/attic"; ref = "fixups-for-magic-nix-cache"; rev = "635753a2069d4b8228e846dc5c09ad361c75cd1a"; }'
  warning: could not update mtime for file '/home/eelco/.cache/nix/gitv3/09788h9zgba5lbfkaa6ija2dvi004jwsqjf5ln21i2njs07cz766/refs/heads/fixups-for-magic-nix-cache': error: changing modification time of '"/home/eelco/.cache/nix/gitv3/09788h9zgba5lbfkaa6ija2dvi004jwsqjf5ln21i2njs07cz766/refs/heads/fixups-for-magic-nix-cache"': No such file or directory

When we're fetching by rev, that file doesn't necessarily exist, and we
don't care about it anyway.

(cherry picked from commit b80b091bac)
This commit is contained in:
Eelco Dolstra 2024-09-09 19:52:21 +02:00 committed by Mergify
parent 0f825b38f4
commit 97c5ac5752
1 changed files with 3 additions and 2 deletions
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5
src/libfetchers/git.cc
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@ -584,9 +584,10 @@ struct GitInputScheme : InputScheme
}
try {
setWriteTime(localRefFile, now, now);
if (!input.getRev())
setWriteTime(localRefFile, now, now);
} catch (Error & e) {
warn("could not update mtime for file '%s': %s", localRefFile, e.msg());
warn("could not update mtime for file '%s': %s", localRefFile, e.info().msg);
}
if (!originalRef && !storeCachedHead(repoInfo.url, ref))
warn("could not update cached head '%s' for '%s'", ref, repoInfo.url);