[PATCH v3 0/4] fix die_if_checked_out() when ignore_current_worktree

[Rubén Justo <rjusto@xxxxxxxxx>]

Changes from v2:

 - is_shared_symref() is introduced in its own commit
 - code style fixes

Rubén Justo (4):
  worktree: introduce is_shared_symref()
  branch: fix die_if_checked_out() when ignore_current_worktree
  rebase: refuse to switch to a branch already checked out elsewhere (test)
  switch: reject if the branch is already checked out elsewhere (test)

 branch.c          | 14 +++++++----
 t/t2060-switch.sh | 29 ++++++++++++++++++++++
 t/t3400-rebase.sh | 14 +++++++++++
 worktree.c        | 63 +++++++++++++++++++++++------------------------
 worktree.h        |  6 +++++
 5 files changed, 89 insertions(+), 37 deletions(-)

Range-diff against v2:
1:  cacdc022f8 < -:  ---------- branch: fix die_if_checked_out() when ignore_current_worktree
-:  ---------- > 1:  6bbe05f452 worktree: introduce is_shared_symref()
-:  ---------- > 2:  d787afe77f branch: fix die_if_checked_out() when ignore_current_worktree
2:  6e9ed45f4e = 3:  4c418d37f8 rebase: refuse to switch to a branch already checked out elsewhere (test)
3:  a66e58e7b2 = 4:  00b075af6a switch: reject if the branch is already checked out elsewhere (test)

Diff against v2:
diff --git a/branch.c b/branch.c
index aa854fa65f..64b7dbfd17 100644
--- a/branch.c
+++ b/branch.c
@@ -820,10 +820,8 @@ void remove_branch_state(struct repository *r, int verbose)
 void die_if_checked_out(const char *branch, int ignore_current_worktree)
 {
 	struct worktree **worktrees = get_worktrees();
-	int i;
 
-	for (i = 0; worktrees[i]; i++)
-	{
+	for (int i = 0; worktrees[i]; i++) {
 		if (worktrees[i]->is_current && ignore_current_worktree)
 			continue;
 
diff --git a/worktree.c b/worktree.c
index d500d69e4c..34043d8fe0 100644
--- a/worktree.c
+++ b/worktree.c
@@ -434,17 +434,12 @@ const struct worktree *find_shared_symref(struct worktree **worktrees,
 					  const char *symref,
 					  const char *target)
 {
-	const struct worktree *existing = NULL;
-	int i = 0;
 
-	for (i = 0; worktrees[i]; i++) {
-		if (is_shared_symref(worktrees[i], symref, target)) {
-			existing = worktrees[i];
-			break;
-		}
-	}
+	for (int i = 0; worktrees[i]; i++)
+		if (is_shared_symref(worktrees[i], symref, target))
+			return worktrees[i];
 
-	return existing;
+	return NULL;
 }
 
 int submodule_uses_worktrees(const char *path)
-- 
2.39.0