help: add --no-[external-commands|aliases] for use with --all

Add the ability to only emit git's own usage information under
--all. This also allows us to extend the "test_section_spacing" tests
added in a preceding commit to test "git help --all"
output.

Previously we could not do that, as the tests might find a git-*
command in the "$PATH", which would make the output differ from one
setup to another.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/help.c b/help.c
index 004117347e..45a21e7e35 100644
--- a/help.c
+++ b/help.c
@@ -476,15 +476,17 @@ static void list_all_cmds_help_aliases(int longest)
 	string_list_clear(&alias_list, 1);
 }
 
-void list_all_cmds_help(void)
+void list_all_cmds_help(int show_external_commands, int show_aliases)
 {
 	int longest;
 
 	puts(_("See 'git help <command>' to read about a specific subcommand"));
 	print_cmd_by_category(main_categories, &longest);
 
-	list_all_cmds_help_external_commands();
-	list_all_cmds_help_aliases(longest);
+	if (show_external_commands)
+		list_all_cmds_help_external_commands();
+	if (show_aliases)
+		list_all_cmds_help_aliases(longest);
 }
 
 int is_in_cmdlist(struct cmdnames *c, const char *s)