[GSoC PATCH] backfill: error out when HEAD cannot be parsed
- From
Trieu Huynh <vikingtc4@gmail.com>
- Date
- Mar 29, 2026, 18:36 UTC
- Message-ID
- <20260329183603.538241-1-vikingtc4@gmail.com>
handle_revision_arg() returns non-zero on failure, but do_backfill() ignored the return value. On an empty repo with no commits, HEAD is unborn and handle_revision_arg() fails, but backfill silently continues with an empty revision walk and exits zero, looks like success but did nothing.
Check the return value and propagate the error, consistent with how builtin/pack-objects.c handles handle_revision_arg() failures.
Add a test to verify that backfill on an empty repository fails with a clear error message.
Signed-off-by: Trieu Huynh <vikingtc4@gmail.com> --- builtin/backfill.c | 3 ++- t/t5620-backfill.sh | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/builtin/backfill.c b/builtin/backfill.c index 27a301f9b2..4b2db94173 100644 --- a/builtin/backfill.c +++ b/builtin/backfill.c @@ -96,7 +96,8 @@ static int do_backfill(struct backfill_context *ctx) } repo_init_revisions(ctx->repo, &revs, ""); - handle_revision_arg("HEAD", &revs, 0, 0); + if (handle_revision_arg("HEAD", &revs, 0, 0)) + return error(_("unable to parse HEAD revision")); info.blobs = 1; info.tags = info.commits = info.trees = 0; diff --git a/t/t5620-backfill.sh b/t/t5620-backfill.sh index ff67e8ecea..91b5115732 100755 --- a/t/t5620-backfill.sh +++ b/t/t5620-backfill.sh @@ -101,6 +101,12 @@ test_expect_success 'backfill no flag on non-TTY is silent' ' test_grep ! "Downloading batches" err ' +test_expect_success 'backfill on empty repo fails gracefully' ' + git init empty-repo && + test_must_fail git -C empty-repo backfill 2>err && + grep "unable to parse HEAD" err +' + test_expect_success 'backfill --sparse without sparse-checkout fails' ' git init not-sparse && test_must_fail git -C not-sparse backfill --sparse 2>err &&
-- 2.43.0