[PATCH 3/7] worktree: teach worktree_lock_reason() to gently handle main worktree

The main worktree should not be locked and the worktree_lock_reason() API
is aware of this fact and avoids running the check code for the main
worktree. This checks is done via assert() macro, Therefore the caller
needs to ensure the function is never called, usually by additional code.

We can handle that case more gently by just returning false for the main
worktree and not bother checking if the "locked" file exists. This will
allowed further simplification from the caller as they will not need to
ensure the main worktree is never passed to the API.

Teach worktree_lock_reason() to be more gently and just return false for
the main working tree.

Signed-off-by: Rafael Silva <redacted>
---
 worktree.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/worktree.c b/worktree.c
index ee14db3ab5..78be83ba16 100644
--- a/worktree.c
+++ b/worktree.c

@@ -225,9 +225,7 @@ int is_main_worktree(const struct worktree *wt)
 
 const char *worktree_lock_reason(struct worktree *wt)
 {
-	assert(!is_main_worktree(wt));
-
-	if (!wt->lock_reason_valid) {
+	if (!is_main_worktree(wt) && !wt->lock_reason_valid) {
 		struct strbuf path = STRBUF_INIT;
 
 		strbuf_addstr(&path, worktree_git_path(wt, "locked"));

-- 
2.30.0.391.g469bf2a980