Before a branch is deleted, we check that it points to a valid
commit. With -d we also check that the commit is a merged; this
check is not done with -D.
The reason for that is that commits pointed to by branches should
never go missing; if they do then something broke and it's better
to stop instead of adding to the mess. And a non-merged commit
may contain changes that are worth preserving, so we require the
stronger option -D instead of -d to get rid of them.
If a branch consists of a symref, these concerns don't apply.
Deleting such a branch can't make a commit become unreferenced,
so we don't need to check if it is merged, or even if it is
actually a valid commit. Skip them in that case. This allows
us to delete dangling symref branches.
Signed-off-by: Rene Scharfe <rene.scharfe@xxxxxxxxxxxxxx>
---
builtin/branch.c | 10 ++++++++--
t/t3200-branch.sh | 9 +++++++++
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/builtin/branch.c b/builtin/branch.c
index 5e1e5b4..d87035a 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -214,6 +214,9 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
die(_("Couldn't look up commit object for HEAD"));
}
for (i = 0; i < argc; i++, strbuf_release(&bname)) {
+ const char *target;
+ int flags = 0;
+
strbuf_branchname(&bname, argv[i]);
if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
error(_("Cannot delete the branch '%s' "
@@ -225,7 +228,9 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
free(name);
name = mkpathdup(fmt, bname.buf);
- if (read_ref(name, sha1)) {
+ target = resolve_ref_unsafe(name, sha1, 0, &flags);
+ if (!target ||
+ (!(flags & REF_ISSYMREF) && is_null_sha1(sha1))) {
error(remote_branch
? _("remote branch '%s' not found.")
: _("branch '%s' not found."), bname.buf);
@@ -233,7 +238,8 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
continue;
}
- if (check_branch_commit(bname.buf, name, sha1, head_rev, kinds,
+ if (!(flags & REF_ISSYMREF) &&
+ check_branch_commit(bname.buf, name, sha1, head_rev, kinds,
force)) {
ret = 1;
continue;
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index ec5f70e..1323f6f 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -273,6 +273,15 @@ test_expect_success 'deleting a symref' '
test_i18ncmp expect actual
'
+test_expect_success 'deleting a dangling symref' '
+ git symbolic-ref refs/heads/dangling-symref nowhere &&
+ test_path_is_file .git/refs/heads/dangling-symref &&
+ echo "Deleted branch dangling-symref (was 0000000)." >expect &&
+ git branch -d dangling-symref >actual &&
+ test_path_is_missing .git/refs/heads/dangling-symref &&
+ test_i18ncmp expect actual
+'
+
test_expect_success 'renaming a symref is not allowed' \
'
git symbolic-ref refs/heads/master2 refs/heads/master &&
--
1.7.12
--
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