path: stop relying on `the_repository` in `worktree_git_path()`

When not provided a worktree, then `worktree_git_path()` will fall back
to returning a path relative to the main repository. In this case, we
implicitly rely on `the_repository` to derive the path. Remove this
dependency by passing a `struct repository` as parameter.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fsck.c

@@ -1050,7 +1050,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 			 * and may get overwritten by other calls
 			 * while we're examining the index.
 			 */
-			path = xstrdup(worktree_git_path(wt, "index"));
+			path = xstrdup(worktree_git_path(the_repository, wt, "index"));
 			read_index_from(&istate, path, get_worktree_git_dir(wt));
 			fsck_index(&istate, path, wt->is_current);
 			discard_index(&istate);

builtin/worktree.c

@@ -1146,14 +1146,14 @@ static void validate_no_submodules(const struct worktree *wt)
 	struct strbuf path = STRBUF_INIT;
 	int i, found_submodules = 0;
 
-	if (is_directory(worktree_git_path(wt, "modules"))) {
+	if (is_directory(worktree_git_path(the_repository, wt, "modules"))) {
 		/*
 		 * There could be false positives, e.g. the "modules"
 		 * directory exists but is empty. But it's a rare case and
 		 * this simpler check is probably good enough for now.
 		 */
 		found_submodules = 1;
-	} else if (read_index_from(&istate, worktree_git_path(wt, "index"),
+	} else if (read_index_from(&istate, worktree_git_path(the_repository, wt, "index"),
 				   get_worktree_git_dir(wt)) > 0) {
 		for (i = 0; i < istate.cache_nr; i++) {
 			struct cache_entry *ce = istate.cache[i];

path.c

@@ -512,12 +512,17 @@ const char *mkpath(const char *fmt, ...)
 	return cleanup_path(pathname->buf);
 }
 
-const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...)
+const char *worktree_git_path(struct repository *r,
+			      const struct worktree *wt, const char *fmt, ...)
 {
 	struct strbuf *pathname = get_pathname();
 	va_list args;
+
+	if (wt && wt->repo != r)
+		BUG("worktree not connected to expected repository");
+
 	va_start(args, fmt);
-	repo_git_pathv(the_repository, wt, pathname, fmt, args);
+	repo_git_pathv(r, wt, pathname, fmt, args);
 	va_end(args);
 	return pathname->buf;
 }

path.h

@@ -95,11 +95,13 @@ const char *git_path(const char *fmt, ...)
 
 /*
  * Similar to git_path() but can produce paths for a specified
- * worktree instead of current one
+ * worktree instead of current one. When no worktree is given, then the path is
+ * computed relative to main worktree of the given repository.
  */
-const char *worktree_git_path(const struct worktree *wt,
+const char *worktree_git_path(struct repository *r,
+			      const struct worktree *wt,
 			      const char *fmt, ...)
-	__attribute__((format (printf, 2, 3)));
+	__attribute__((format (printf, 3, 4)));
 
 /*
  * Return a path into the main repository's (the_repository) git directory.

revision.c

@@ -1872,7 +1872,7 @@ void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
 			continue; /* current index already taken care of */
 
 		if (read_index_from(&istate,
-				    worktree_git_path(wt, "index"),
+				    worktree_git_path(the_repository, wt, "index"),
 				    get_worktree_git_dir(wt)) > 0)
 			do_add_index_objects_to_pending(revs, &istate, flags);
 		discard_index(&istate);

worktree.c

@@ -252,7 +252,7 @@ const char *worktree_lock_reason(struct worktree *wt)
 	if (!wt->lock_reason_valid) {
 		struct strbuf path = STRBUF_INIT;
 
-		strbuf_addstr(&path, worktree_git_path(wt, "locked"));
+		strbuf_addstr(&path, worktree_git_path(the_repository, wt, "locked"));
 		if (file_exists(path.buf)) {
 			struct strbuf lock_reason = STRBUF_INIT;
 			if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)

wt-status.c

@@ -1618,7 +1618,7 @@ static char *get_branch(const struct worktree *wt, const char *path)
 	struct object_id oid;
 	const char *branch_name;
 
-	if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
+	if (strbuf_read_file(&sb, worktree_git_path(the_repository, wt, "%s", path), 0) <= 0)
 		goto got_nothing;
 
 	while (sb.len && sb.buf[sb.len - 1] == '\n')
@@ -1716,18 +1716,18 @@ int wt_status_check_rebase(const struct worktree *wt,
 {
 	struct stat st;
 
-	if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
-		if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
+	if (!stat(worktree_git_path(the_repository, wt, "rebase-apply"), &st)) {
+		if (!stat(worktree_git_path(the_repository, wt, "rebase-apply/applying"), &st)) {
 			state->am_in_progress = 1;
-			if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
+			if (!stat(worktree_git_path(the_repository, wt, "rebase-apply/patch"), &st) && !st.st_size)
 				state->am_empty_patch = 1;
 		} else {
 			state->rebase_in_progress = 1;
 			state->branch = get_branch(wt, "rebase-apply/head-name");
 			state->onto = get_branch(wt, "rebase-apply/onto");
 		}
-	} else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
-		if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
+	} else if (!stat(worktree_git_path(the_repository, wt, "rebase-merge"), &st)) {
+		if (!stat(worktree_git_path(the_repository, wt, "rebase-merge/interactive"), &st))
 			state->rebase_interactive_in_progress = 1;
 		else
 			state->rebase_in_progress = 1;
@@ -1743,7 +1743,7 @@ int wt_status_check_bisect(const struct worktree *wt,
 {
 	struct stat st;
 
-	if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
+	if (!stat(worktree_git_path(the_repository, wt, "BISECT_LOG"), &st)) {
 		state->bisect_in_progress = 1;
 		state->bisecting_from = get_branch(wt, "BISECT_START");
 		return 1;