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| author | Junio C Hamano <gitster@pobox.com> | 2024-12-03 11:32:40 +0900 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2024-12-03 12:38:50 +0900 |
| commit | bbd445d5efd415d43ac6102a3e9541b9ac4f0329 (patch) | |
| tree | 80310da275a41a26c71d2e42dfbaa1003e635e06 | |
| parent | e5ce5b05d09c17c3d6a1d95c4c822dd3a73a9100 (diff) | |
| download | git-bbd445d5efd415d43ac6102a3e9541b9ac4f0329.tar.gz | |
tag: "git tag" refuses to use HEAD as a tagname
Even though the plumbing level allows you to create refs/tags/HEAD
and refs/heads/HEAD, doing so makes it confusing within the context
of the UI Git Porcelain commands provides. Just like we prevent a
branch from getting called "HEAD" at the Porcelain layer (i.e. "git
branch" command), teach "git tag" to refuse to create a tag "HEAD".
With a few new tests, we make sure that
- "git tag HEAD" and "git tag -a HEAD" are rejected
- "git update-ref refs/tags/HEAD" is still allowed (this is a
deliberate design decision to allow others to create their own UI
on top of Git infrastructure that may be different from our UI).
- "git tag -d HEAD" can remove refs/tags/HEAD to recover from an
mistake.
Helped-by: Jeff King <peff@peff.net>
Helped-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | refs.c | 2 | ||||
| -rwxr-xr-x | t/t7004-tag.sh | 12 |
2 files changed, 13 insertions, 1 deletions
@@ -735,7 +735,7 @@ int check_branch_ref(struct strbuf *sb, const char *name) int check_tag_ref(struct strbuf *sb, const char *name) { - if (name[0] == '-') + if (name[0] == '-' || !strcmp(name, "HEAD")) return -1; strbuf_reset(sb); diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh index b1316e62f4..34d34b0dfb 100755 --- a/t/t7004-tag.sh +++ b/t/t7004-tag.sh @@ -91,6 +91,18 @@ test_expect_success 'creating a tag using default HEAD should succeed' ' test_must_fail git reflog exists refs/tags/mytag ' +test_expect_success 'HEAD is forbidden as a tagname' ' + test_when_finished "git update-ref --no-deref -d refs/tags/HEAD || :" && + test_must_fail git tag HEAD && + test_must_fail git tag -a -m "useless" HEAD +' + +test_expect_success '"git tag" can remove a tag named HEAD' ' + test_when_finished "git update-ref --no-deref -d refs/tags/HEAD || :" && + git update-ref refs/tags/HEAD HEAD && + git tag -d HEAD +' + test_expect_success 'creating a tag with --create-reflog should create reflog' ' git log -1 \ --format="format:tag: tagging %h (%s, %cd)%n" \ |