worktree: allow the main brach of a bare repository to be checked out

In bare repositories, get_worktrees() still returns the main repository,
so git worktree list can show it. ignore it in find_shared_symref so we
can still check out the main branch.

Signed-off-by: Dennis Kaarsemaker <dennis@kaarsemaker.net>
Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t2025-worktree-add.sh b/t/t2025-worktree-add.sh
index 4bcc335..b618d6b 100755 (executable)
--- a/t/t2025-worktree-add.sh
+++ b/t/t2025-worktree-add.sh
@@ -138,6 +138,14 @@ test_expect_success 'checkout from a bare repo without "add"' '
        )
 '
 
+test_expect_success '"add" default branch of a bare repo' '
+       (
+               git clone --bare . bare2 &&
+               cd bare2 &&
+               git worktree add ../there3 master
+       )
+'
+
 test_expect_success 'checkout with grafts' '
        test_when_finished rm .git/info/grafts &&
        test_commit abc &&

diff --git a/worktree.c b/worktree.c
index 5acfe4c..f7869f8 100644 (file)
--- a/worktree.c
+++ b/worktree.c
@@ -345,6 +345,8 @@ const struct worktree *find_shared_symref(const char *symref,
 
        for (i = 0; worktrees[i]; i++) {
                struct worktree *wt = worktrees[i];
+               if (wt->is_bare)
+                       continue;
 
                if (wt->is_detached && !strcmp(symref, "HEAD")) {
                        if (is_worktree_being_rebased(wt, target)) {