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Support empty Git repositories / workdirs

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Fixes #10039.

(cherry picked from commit 9e762454cf)
This commit is contained in:
Eelco Dolstra 2024-02-20 11:40:02 +01:00 • committed by github-actions[bot]
parent 2e78ef5612
commit 15c0a7b2ce
5 changed files with 52 additions and 10 deletions
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8
src/libfetchers/git.cc
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@ -158,6 +158,8 @@ std::vector<PublicKey> getPublicKeys(const Attrs & attrs)
} // end namespace
static const Hash nullRev{HashAlgorithm::SHA1};
struct GitInputScheme : InputScheme
{
std::optional<Input> inputFromURL(const ParsedURL & url, bool requireTree) const override
@ -708,10 +710,12 @@ struct GitInputScheme : InputScheme
if (auto ref = repo->getWorkdirRef())
input.attrs.insert_or_assign("ref", *ref);
auto rev = repoInfo.workdirInfo.headRev.value();
/* Return a rev of 000... if there are no commits yet. */
auto rev = repoInfo.workdirInfo.headRev.value_or(nullRev);
input.attrs.insert_or_assign("rev", rev.gitRev());
input.attrs.insert_or_assign("revCount", getRevCount(repoInfo, repoInfo.url, rev));
input.attrs.insert_or_assign("revCount",
rev == nullRev ? 0 : getRevCount(repoInfo, repoInfo.url, rev));
verifyCommit(input, repo);
} else {