When "git branch -D <name>" is run, Git usually first checks if that
branch is currently checked out. But this check is not performed if the
Git directory of that repository is not at "<repo>/.git", which is the
case if that repository is a submodule that has its Git directory stored
as "super/.git/modules/<repo>", for example.
This is because get_main_worktree() in worktree.c sets is_bare on a
worktree only using the heuristic that a repo is bare if the worktree's
path ends in "/.git", and not bare otherwise. This is_bare code was
introduced in 92718b7438 ("worktree: add details to the worktree
struct", 2015-10-08), following a pre-core.bare heuristic. This patch
does 2 things:
- Teach get_main_worktree() to use is_bare_repository() instead,
introduced in 7d1864ce67 ("Introduce is_bare_repository() and
core.bare configuration variable", 2007-01-07) and updated in
e90fdc39b6 ("Clean up work-tree handling", 2007-08-01). This solves
the "git branch -D <name>" problem described above. However...
- If a repository has core.bare=1 but the "git" command is being run
from one of its added worktrees, is_bare_repository() returns false
(which is fine, since there is a worktree available). However,
commands like "git worktree list" currently distinguish between a
repository that has core.bare=1 but has a worktree available, and a
repository that is truly non-bare (core.bare=0). To preserve this
distinction, also check core.bare when setting is_bare. If
core.bare=1, trust it, and otherwise, use is_bare_repository().
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
t/t3200-branch.sh | 14 ++++++++++++++
worktree.c | 7 +++----
2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 478b82cf9b..db5c411e76 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -264,6 +264,20 @@ test_expect_success 'git branch --list -d t should fail' '
test_must_fail git rev-parse refs/heads/t
'
+test_expect_success 'deleting checked-out branch from repo that is a submodule' '
+ test_when_finished "rm -rf repo1 repo2" &&
+
+ git init repo1 &&
+ git init repo1/sub &&
+ test_commit -C repo1/sub x &&
+ git -C repo1 submodule add ./sub &&
+ git -C repo1 commit -m "adding sub" &&
+
+ git clone --recurse-submodules repo1 repo2 &&
+ git -C repo2/sub checkout -b work &&
+ test_must_fail git -C repo2/sub branch -D work
+'
+
test_expect_success 'git branch --list -v with --abbrev' '
test_when_finished "git branch -D t" &&
git branch t &&
diff --git a/worktree.c b/worktree.c
index b45bfeb9d3..5d52b2ba53 100644
--- a/worktree.c
+++ b/worktree.c
@@ -49,18 +49,17 @@ static struct worktree *get_main_worktree(void)
struct worktree *worktree = NULL;
struct strbuf path = STRBUF_INIT;
struct strbuf worktree_path = STRBUF_INIT;
- int is_bare = 0;
strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
- is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
- if (is_bare)
+ if (!strbuf_strip_suffix(&worktree_path, "/.git"))
strbuf_strip_suffix(&worktree_path, "/.");
strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
worktree = xcalloc(1, sizeof(*worktree));
worktree->path = strbuf_detach(&worktree_path, NULL);
- worktree->is_bare = is_bare;
+ worktree->is_bare = (is_bare_repository_cfg == 1) ||
+ is_bare_repository();
add_head_info(worktree);
strbuf_release(&path);
--
2.21.0.392.gf8f6787159e-goog
