From 62a2d52514aed2b684409cb48e40e0cd14335d1b Mon Sep 17 00:00:00 2001 From: Jonathan Nieder Date: Wed, 10 Sep 2014 18:22:48 -0700 Subject: branch -d: avoid repeated symref resolution If a repository gets in a broken state with too much symref nesting, it cannot be repaired with "git branch -d": $ git symbolic-ref refs/heads/nonsense refs/heads/nonsense $ git branch -d nonsense error: branch 'nonsense' not found. Worse, "git update-ref --no-deref -d" doesn't work for such repairs either: $ git update-ref -d refs/heads/nonsense error: unable to resolve reference refs/heads/nonsense: Too many levels of symbolic links Fix both by teaching resolve_ref_unsafe a new RESOLVE_REF_NO_RECURSE flag and passing it when appropriate. Callers can still read the value of a symref (for example to print a message about it) with that flag set --- resolve_ref_unsafe will resolve one level of symrefs and stop there. Signed-off-by: Jonathan Nieder Reviewed-by: Ronnie Sahlberg Signed-off-by: Junio C Hamano --- t/t1400-update-ref.sh | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 't/t1400-update-ref.sh') diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh index 0218e9636..7c8c41a1a 100755 --- a/t/t1400-update-ref.sh +++ b/t/t1400-update-ref.sh @@ -110,6 +110,40 @@ test_expect_success "delete symref without dereference when the referred ref is cp -f .git/HEAD.orig .git/HEAD git update-ref -d $m +test_expect_success 'update-ref -d is not confused by self-reference' ' + git symbolic-ref refs/heads/self refs/heads/self && + test_when_finished "rm -f .git/refs/heads/self" && + test_path_is_file .git/refs/heads/self && + test_must_fail git update-ref -d refs/heads/self && + test_path_is_file .git/refs/heads/self +' + +test_expect_success 'update-ref --no-deref -d can delete self-reference' ' + git symbolic-ref refs/heads/self refs/heads/self && + test_when_finished "rm -f .git/refs/heads/self" && + test_path_is_file .git/refs/heads/self && + git update-ref --no-deref -d refs/heads/self && + test_path_is_missing .git/refs/heads/self +' + +test_expect_success 'update-ref --no-deref -d can delete reference to bad ref' ' + >.git/refs/heads/bad && + test_when_finished "rm -f .git/refs/heads/bad" && + git symbolic-ref refs/heads/ref-to-bad refs/heads/bad && + test_when_finished "rm -f .git/refs/heads/ref-to-bad" && + test_path_is_file .git/refs/heads/ref-to-bad && + git update-ref --no-deref -d refs/heads/ref-to-bad && + test_path_is_missing .git/refs/heads/ref-to-bad +' + +test_expect_success 'update-ref --no-deref -d can delete reference to broken name' ' + git symbolic-ref refs/heads/badname refs/heads/broken...ref && + test_when_finished "rm -f .git/refs/heads/badname" && + test_path_is_file .git/refs/heads/badname && + git update-ref --no-deref -d refs/heads/badname && + test_path_is_missing .git/refs/heads/badname +' + test_expect_success '(not) create HEAD with old sha1' " test_must_fail git update-ref HEAD $A $B " -- cgit v1.2.1