worktree: remove extra members from struct add_opts

There are two members of 'struct add_opts', which are only used inside
the 'add()' function, but being part of 'struct add_opts' they are
needlessly also passed to the 'add_worktree' function.

Make them local to the 'add()' function to make it clearer where they
are used.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/worktree.c

@@ -27,8 +27,6 @@ struct add_opts {
 	int detach;
 	int checkout;
 	int keep_locked;
-	const char *new_branch;
-	int force_new_branch;
 };
 
 static int show_only;
@@ -363,10 +361,11 @@ static int add(int ac, const char **av, const char *prefix)
 	const char *new_branch_force = NULL;
 	char *path;
 	const char *branch;
+	const char *new_branch = NULL;
 	const char *opt_track = NULL;
 	struct option options[] = {
 		OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
-		OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
+		OPT_STRING('b', NULL, &new_branch, N_("branch"),
 			   N_("create a new branch")),
 		OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
 			   N_("create or reset a branch")),
@@ -384,7 +383,7 @@ static int add(int ac, const char **av, const char *prefix)
 	memset(&opts, 0, sizeof(opts));
 	opts.checkout = 1;
 	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
-	if (!!opts.detach + !!opts.new_branch + !!new_branch_force > 1)
+	if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
 		die(_("-b, -B, and --detach are mutually exclusive"));
 	if (ac < 1 || ac > 2)
 		usage_with_options(worktree_usage, options);
@@ -395,33 +394,33 @@ static int add(int ac, const char **av, const char *prefix)
 	if (!strcmp(branch, "-"))
 		branch = "@{-1}";
 
-	opts.force_new_branch = !!new_branch_force;
-	if (opts.force_new_branch) {
+	if (new_branch_force) {
 		struct strbuf symref = STRBUF_INIT;
 
-		opts.new_branch = new_branch_force;
+		new_branch = new_branch_force;
 
 		if (!opts.force &&
-		    !strbuf_check_branch_ref(&symref, opts.new_branch) &&
+		    !strbuf_check_branch_ref(&symref, new_branch) &&
 		    ref_exists(symref.buf))
 			die_if_checked_out(symref.buf, 0);
 		strbuf_release(&symref);
 	}
 
-	if (ac < 2 && !opts.new_branch && !opts.detach) {
+	if (ac < 2 && !new_branch && !opts.detach) {
 		int n;
 		const char *s = worktree_basename(path, &n);
-		opts.new_branch = xstrndup(s, n);
+		new_branch = xstrndup(s, n);
+		UNLEAK(new_branch);
 		if (guess_remote) {
 			struct object_id oid;
 			const char *remote =
-				unique_tracking_name(opts.new_branch, &oid);
+				unique_tracking_name(new_branch, &oid);
 			if (remote)
 				branch = remote;
 		}
 	}
 
-	if (ac == 2 && !opts.new_branch && !opts.detach) {
+	if (ac == 2 && !new_branch && !opts.detach) {
 		struct object_id oid;
 		struct commit *commit;
 		const char *remote;
@@ -430,25 +429,25 @@ static int add(int ac, const char **av, const char *prefix)
 		if (!commit) {
 			remote = unique_tracking_name(branch, &oid);
 			if (remote) {
-				opts.new_branch = branch;
+				new_branch = branch;
 				branch = remote;
 			}
 		}
 	}
 
-	if (opts.new_branch) {
+	if (new_branch) {
 		struct child_process cp = CHILD_PROCESS_INIT;
 		cp.git_cmd = 1;
 		argv_array_push(&cp.args, "branch");
-		if (opts.force_new_branch)
+		if (new_branch_force)
 			argv_array_push(&cp.args, "--force");
-		argv_array_push(&cp.args, opts.new_branch);
+		argv_array_push(&cp.args, new_branch);
 		argv_array_push(&cp.args, branch);
 		if (opt_track)
 			argv_array_push(&cp.args, opt_track);
 		if (run_command(&cp))
 			return -1;
-		branch = opts.new_branch;
+		branch = new_branch;
 	} else if (opt_track) {
 		die(_("--[no-]track can only be used if a new branch is created"));
 	}