repo: show subcommand-specific help text

Use subcommand-specific usage arrays for "git repo info" and
"git repo structure" so that each command shows only its own
synopsis in help output.

Add tests to cover the subcommand help behavior.

Signed-off-by: Mahi Kassa <mahlet.takassa@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

3 files changed, 24 insertions, 2 deletions

diff --git a/builtin/repo.c b/builtin/repo.c
index b5146499d0..71a5c1c29c 100644
--- a/builtin/repo.c
+++ b/builtin/repo.c
@@ -33,6 +33,16 @@ static const char *const repo_usage[] = {
 	NULL,
 };
 
+static const char *const repo_info_usage[] = {
+	REPO_INFO_USAGE,
+	NULL,
+};
+
+static const char *const repo_structure_usage[] = {
+	REPO_STRUCTURE_USAGE,
+	NULL,
+};
+
 typedef int get_value_fn(struct repository *repo, struct strbuf *buf);
 
 enum output_format {
@@ -220,7 +230,7 @@ static int cmd_repo_info(int argc, const char **argv, const char *prefix,
 		OPT_END()
 	};
 
-	argc = parse_options(argc, argv, prefix, options, repo_usage, 0);
+	argc = parse_options(argc, argv, prefix, options, repo_info_usage, 0);
 
 	if (show_keys && (all_keys || argc))
 		die(_("--keys cannot be used with a <key> or --all"));
@@ -885,7 +895,7 @@ static int cmd_repo_structure(int argc, const char **argv, const char *prefix,
 		OPT_END()
 	};
 
-	argc = parse_options(argc, argv, prefix, options, repo_usage, 0);
+	argc = parse_options(argc, argv, prefix, options, repo_structure_usage, 0);
 	if (argc)
 		usage(_("too many arguments"));
 
diff --git a/t/t1900-repo-info.sh b/t/t1900-repo-info.sh
index a9eb07abe8..39bb77dda0 100755
--- a/t/t1900-repo-info.sh
+++ b/t/t1900-repo-info.sh
@@ -149,4 +149,10 @@ test_expect_success 'git repo info --keys uses lines as its default output forma
 	test_cmp expect actual
 '
 
+test_expect_success 'git repo info -h shows only repo info usage' '
+	test_must_fail git repo info -h >actual &&
+	test_grep "git repo info" actual &&
+	test_grep ! "git repo structure" actual
+'
+
 test_done
diff --git a/t/t1901-repo-structure.sh b/t/t1901-repo-structure.sh
index 98921ce1cb..10050abd70 100755
--- a/t/t1901-repo-structure.sh
+++ b/t/t1901-repo-structure.sh
@@ -224,4 +224,10 @@ test_expect_success 'progress meter option' '
 	)
 '
 
+test_expect_success 'git repo structure -h shows only repo structure usage' '
+	test_must_fail git repo structure -h >actual &&
+	test_grep "git repo structure" actual &&
+	test_grep ! "git repo info" actual
+'
+
 test_done