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Ensure we restrict refspec interpretation while fetching

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As `git fetch` may chose to interpret refspec to it's liking, ensure that we
only pass refs that begin with `refs/` as is, otherwise, prepend them with
`refs/heads`. Otherwise, branches named `heads/foo` (I know it's bad, but it's
allowed), would be fetched as `foo`, instead of `heads/foo`.
This commit is contained in:
Nikola Knezevic 2020-05-30 12:33:38 +02:00
parent 77007d4eab
commit fb38459d6e
1 changed files with 4 additions and 1 deletions
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5
src/libfetchers/git.cc
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@ -282,7 +282,10 @@ struct GitInput : Input
// FIXME: git stderr messes up our progress indicator, so // FIXME: git stderr messes up our progress indicator, so
// we're using --quiet for now. Should process its stderr. // we're using --quiet for now. Should process its stderr.
try { try {
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", *input->ref, *input->ref) }); auto fetchRef = input->ref->compare(0, 5, "refs/") == 0
? *input->ref
: "refs/heads/" + *input->ref;
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", fetchRef, fetchRef) });
} catch (Error & e) { } catch (Error & e) {
if (!pathExists(localRefFile)) throw; if (!pathExists(localRefFile)) throw;
warn("could not update local clone of Git repository '%s'; continuing with the most recent version", actualUrl); warn("could not update local clone of Git repository '%s'; continuing with the most recent version", actualUrl);