worktree: define subcommand -h in terms of command -h

Avoid repeating the "-h" output for the "git worktree" command, and
instead define the usage of each subcommand with macros, so that the
"-h" output for the command itself can re-use those definitions. See
[1], [2] and [3] for prior art using the same pattern.

1. b25b727 (builtin/multi-pack-index.c: define common usage with a
   macro, 2021-03-30)
2. 8757b35 (commit-graph: define common usage with a macro,
   2021-08-23)
3. 1e91d3f (reflog: move "usage" variables and use macros,
   2022-03-17)

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

builtin/worktree.c

@@ -15,15 +15,72 @@
 #include "worktree.h"
 #include "quote.h"
 
-static const char * const worktree_usage[] = {
-	N_("git worktree add [<options>] <path> [<commit-ish>]"),
-	N_("git worktree list [<options>]"),
-	N_("git worktree lock [<options>] <path>"),
-	N_("git worktree move <worktree> <new-path>"),
-	N_("git worktree prune [<options>]"),
-	N_("git worktree remove [<options>] <worktree>"),
-	N_("git worktree repair [<path>...]"),
-	N_("git worktree unlock <worktree>"),
+#define BUILTIN_WORKTREE_ADD_USAGE \
+	N_("git worktree add [<options>] <path> [<commit-ish>]")
+#define BUILTIN_WORKTREE_LIST_USAGE \
+	N_("git worktree list [<options>]")
+#define BUILTIN_WORKTREE_LOCK_USAGE \
+	N_("git worktree lock [<options>] <path>")
+#define BUILTIN_WORKTREE_MOVE_USAGE \
+	N_("git worktree move <worktree> <new-path>")
+#define BUILTIN_WORKTREE_PRUNE_USAGE \
+	N_("git worktree prune [<options>]")
+#define BUILTIN_WORKTREE_REMOVE_USAGE \
+	N_("git worktree remove [<options>] <worktree>")
+#define BUILTIN_WORKTREE_REPAIR_USAGE \
+	N_("git worktree repair [<path>...]")
+#define BUILTIN_WORKTREE_UNLOCK_USAGE \
+	N_("git worktree unlock <worktree>")
+
+static const char * const git_worktree_usage[] = {
+	BUILTIN_WORKTREE_ADD_USAGE,
+	BUILTIN_WORKTREE_LIST_USAGE,
+	BUILTIN_WORKTREE_LOCK_USAGE,
+	BUILTIN_WORKTREE_MOVE_USAGE,
+	BUILTIN_WORKTREE_PRUNE_USAGE,
+	BUILTIN_WORKTREE_REMOVE_USAGE,
+	BUILTIN_WORKTREE_REPAIR_USAGE,
+	BUILTIN_WORKTREE_UNLOCK_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_add_usage[] = {
+	BUILTIN_WORKTREE_ADD_USAGE,
+	NULL,
+};
+
+static const char * const git_worktree_list_usage[] = {
+	BUILTIN_WORKTREE_LIST_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_lock_usage[] = {
+	BUILTIN_WORKTREE_LOCK_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_move_usage[] = {
+	BUILTIN_WORKTREE_MOVE_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_prune_usage[] = {
+	BUILTIN_WORKTREE_PRUNE_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_remove_usage[] = {
+	BUILTIN_WORKTREE_REMOVE_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_repair_usage[] = {
+	BUILTIN_WORKTREE_REPAIR_USAGE,
+	NULL
+};
+
+static const char * const git_worktree_unlock_usage[] = {
+	BUILTIN_WORKTREE_UNLOCK_USAGE,
 	NULL
 };
 
@@ -153,9 +210,10 @@ static int prune(int ac, const char **av, const char *prefix)
 	};
 
 	expire = TIME_MAX;
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_prune_usage,
+			   0);
 	if (ac)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_prune_usage, options);
 	prune_worktrees();
 	return 0;
 }
@@ -573,7 +631,7 @@ 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);
+	ac = parse_options(ac, av, prefix, options, git_worktree_add_usage, 0);
 	if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
 		die(_("options '%s', '%s', and '%s' cannot be used together"), "-b", "-B", "--detach");
 	if (lock_reason && !keep_locked)
@@ -584,7 +642,7 @@ static int add(int ac, const char **av, const char *prefix)
 		opts.keep_locked = _("added with --lock");
 
 	if (ac < 1 || ac > 2)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_add_usage, options);
 
 	path = prefix_filename(prefix, av[0]);
 	branch = ac < 2 ? "HEAD" : av[1];
@@ -772,9 +830,9 @@ static int list(int ac, const char **av, const char *prefix)
 	};
 
 	expire = TIME_MAX;
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_list_usage, 0);
 	if (ac)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_list_usage, options);
 	else if (verbose && porcelain)
 		die(_("options '%s' and '%s' cannot be used together"), "--verbose", "--porcelain");
 	else if (!line_terminator && !porcelain)
@@ -811,9 +869,9 @@ static int lock_worktree(int ac, const char **av, const char *prefix)
 	};
 	struct worktree **worktrees, *wt;
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_lock_usage, 0);
 	if (ac != 1)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_lock_usage, options);
 
 	worktrees = get_worktrees();
 	wt = find_worktree(worktrees, prefix, av[0]);
@@ -844,9 +902,9 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
 	struct worktree **worktrees, *wt;
 	int ret;
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_unlock_usage, 0);
 	if (ac != 1)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_unlock_usage, options);
 
 	worktrees = get_worktrees();
 	wt = find_worktree(worktrees, prefix, av[0]);
@@ -914,9 +972,10 @@ static int move_worktree(int ac, const char **av, const char *prefix)
 	const char *reason = NULL;
 	char *path;
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_move_usage,
+			   0);
 	if (ac != 2)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_move_usage, options);
 
 	path = prefix_filename(prefix, av[1]);
 	strbuf_addstr(&dst, path);
@@ -1042,9 +1101,9 @@ static int remove_worktree(int ac, const char **av, const char *prefix)
 	const char *reason = NULL;
 	int ret = 0;
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_remove_usage, 0);
 	if (ac != 1)
-		usage_with_options(worktree_usage, options);
+		usage_with_options(git_worktree_remove_usage, options);
 
 	worktrees = get_worktrees();
 	wt = find_worktree(worktrees, prefix, av[0]);
@@ -1102,7 +1161,7 @@ static int repair(int ac, const char **av, const char *prefix)
 	};
 	int rc = 0;
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_repair_usage, 0);
 	p = ac > 0 ? av : self;
 	for (; *p; p++)
 		repair_worktree_at_path(*p, report_repair, &rc);
@@ -1130,6 +1189,6 @@ int cmd_worktree(int ac, const char **av, const char *prefix)
 	if (!prefix)
 		prefix = "";
 
-	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	ac = parse_options(ac, av, prefix, options, git_worktree_usage, 0);
 	return fn(ac, av, prefix);
 }