[PATCH] worktree add: shouldn't dwim if -b or -B is given

From: Yoichi NAKAYAMA <[email protected]>

'git worktree add <path> <branch>' DWIMs <branch> to a
remote-tracking branch when neither -b, -B, nor --detach
is given.

However, 'git worktree add -b <new-branch> <path> <branch>' can
still DWIM <branch>, causing <new-branch> to be ignored.

This is a regression introduced in v2.42.0
(128e5496b325640f0a09cc1d5b1e346c069b410f).

Signed-off-by: Yoichi NAKAYAMA <[email protected]>
---
    worktree add: shouldn't dwim if -b or -B is given

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-2192%2Fyoichi%2Fworktree-add-should-not-dwim-with-b-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-2192/yoichi/worktree-add-should-not-dwim-with-b-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/2192

 builtin/worktree.c      |  2 +-
 t/t2400-worktree-add.sh | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/builtin/worktree.c b/builtin/worktree.c
index 654d27c3e1..3204afdb12 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -897,7 +897,7 @@ static int add(int ac, const char **av, const char *prefix,
 
 		/* DWIM: Infer --orphan when repo has no refs. */
 		opts.orphan = (!s) && dwim_orphan(&opts, !!opt_track, 1);
-	} else if (ac == 2) {
+	} else if (ac == 2 && !new_branch) {
 		struct object_id oid;
 		struct commit *commit;
 		char *remote;
diff --git a/t/t2400-worktree-add.sh b/t/t2400-worktree-add.sh
index 87b926728a..9cbf84861d 100755
--- a/t/t2400-worktree-add.sh
+++ b/t/t2400-worktree-add.sh
@@ -621,6 +621,16 @@ test_expect_success '"add" <path> <branch> dwims' '
 	)
 '
 
+test_expect_success '"add" <path> <branch> does not dwim with -b' '
+	test_when_finished rm -rf repo_upstream repo_dwim foo &&
+	setup_remote_repo repo_upstream repo_dwim &&
+	git init repo_dwim &&
+	(
+		cd repo_dwim &&
+		test_must_fail git worktree add -b branch ../foo foo
+	)
+'
+
 test_expect_success '"add" <path> <branch> dwims with checkout.defaultRemote' '
 	test_when_finished rm -rf repo_upstream repo_dwim foo &&
 	setup_remote_repo repo_upstream repo_dwim &&

base-commit: 5b2471720c93ee30e5764a19f3d3b3ae9ec9712a
-- 
gitgitgadget