From: Dmitry Ivankov Date: Thu, 22 Sep 2011 19:47:04 GMT Subject: [PATCH 1/2] fast-import: don't allow to tag empty branch Message-ID: <1316720825-32552-2-git-send-email-divanorama@gmail.com> In-Reply-To: <1316720825-32552-1-git-send-email-divanorama@gmail.com> 'reset' command makes fast-import start a branch from scratch. It's name is kept in lookup table but it's sha1 is null_sha1 (special value). 'tag' command can be used to tag a branch by it's name. lookup_branch() is used it that case and it doesn't check for null_sha1. So fast-import writes a tag for null_sha1 object instead of giving a error. Add a check to deny tagging an empty branch and add a corresponding test. Signed-off-by: Dmitry Ivankov --- fast-import.c | 2 ++ t/t9300-fast-import.sh | 12 ++++++++++++ 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/fast-import.c b/fast-import.c index 742e7da..c44cc11 100644 --- a/fast-import.c +++ b/fast-import.c @@ -2717,6 +2717,8 @@ static void parse_new_tag(void) from = strchr(command_buf.buf, ' ') + 1; s = lookup_branch(from); if (s) { + if (is_null_sha1(s->sha1)) + die("Can't tag an empty branch."); hashcpy(sha1, s->sha1); type = OBJ_COMMIT; } else if (*from == ':') { diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh index 1a6c066..0b97d7a 100755 --- a/t/t9300-fast-import.sh +++ b/t/t9300-fast-import.sh @@ -820,6 +820,18 @@ test_expect_success \ 'test 1 = `git rev-list J | wc -l` && test 0 = `git ls-tree J | wc -l`' +cat >input <