Re: Git branch outputs usage message on stderr

[Junio C Hamano <gitster@pobox.com>]

Jeff King <peff@peff.net> writes:

> use that everywhere. Possibly it could even do the argc/argv check, too,
> since every call site is going to be doing that itself.

It would look something like this; I am not sure if I like the "this
may show help and exit if the user requested, but otherwise it is a
no-op" semantics, though.

 builtin/am.c    |  3 +--
 parse-options.c | 10 ++++++++++
 parse-options.h |  4 ++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git c/builtin/am.c w/builtin/am.c
index 370f5593f2..c9571f605a 100644
--- c/builtin/am.c
+++ w/builtin/am.c
@@ -2417,8 +2417,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
 		OPT_END()
 	};
 
-	if (argc == 2 && !strcmp(argv[1], "-h"))
-		usage_with_options(usage, options);
+	show_usage_help(argc, argv, usage, options);
 
 	git_config(git_default_config, NULL);
 
diff --git c/parse-options.c w/parse-options.c
index 30b9e68f8a..9419b174de 100644
--- c/parse-options.c
+++ w/parse-options.c
@@ -1276,6 +1276,16 @@ void NORETURN usage_with_options(const char * const *usagestr,
 	exit(129);
 }
 
+void show_usage_help(int ac, const char **av,
+		     const char * const *usagestr,
+		     const struct option *opts)
+{
+	if (ac == 2 && !strcmp(av[1], "-h")) {
+		usage_with_options_internal(NULL, usagestr, opts, 0, 0);
+		exit(0);
+	}
+}
+
 void NORETURN usage_msg_opt(const char *msg,
 		   const char * const *usagestr,
 		   const struct option *options)
diff --git c/parse-options.h w/parse-options.h
index ae15342390..75a7493350 100644
--- c/parse-options.h
+++ w/parse-options.h
@@ -388,6 +388,10 @@ int parse_options(int argc, const char **argv, const char *prefix,
 NORETURN void usage_with_options(const char * const *usagestr,
 				 const struct option *options);
 
+void show_usage_help(int, const char **,
+		     const char * const *usagestr,
+		     const struct option *options);
+
 NORETURN void usage_msg_opt(const char *msg,
 			    const char * const *usagestr,
 			    const struct option *options);