Merge branch 'jk/consistent-h'

"git $cmd -h" for builtin commands calls the implementation of the
command (i.e. cmd_$cmd() function) without doing any repository
set-up, and the commands that expect RUN_SETUP is done by the Git
potty needs to be prepared to show the help text without barfing.

* jk/consistent-h:
  t0012: test "-h" with builtins
  git: add hidden --list-builtins option
  version: convert to parse-options
  diff- and log- family: handle "git cmd -h" early
  submodule--helper: show usage for "-h"
  remote-{ext,fd}: print usage message on invalid arguments
  upload-archive: handle "-h" option early
  credential: handle invalid arguments earlier

1 files changed, 12 insertions, 0 deletions

diff --git a/git.c b/git.c
index 8ff44f081d..1b8b7f51a6 100644
--- a/git.c
+++ b/git.c
@@ -26,6 +26,8 @@ static const char *env_names[] = {
 static char *orig_env[4];
 static int save_restore_env_balance;
 
+static void list_builtins(void);
+
 static void save_env_before_alias(void)
 {
 	int i;
@@ -232,6 +234,9 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 			}
 			(*argv)++;
 			(*argc)--;
+		} else if (!strcmp(cmd, "--list-builtins")) {
+			list_builtins();
+			exit(0);
 		} else {
 			fprintf(stderr, "Unknown option: %s\n", cmd);
 			usage(git_usage_string);
@@ -529,6 +534,13 @@ int is_builtin(const char *s)
 	return !!get_builtin(s);
 }
 
+static void list_builtins(void)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(commands); i++)
+		printf("%s\n", commands[i].cmd);
+}
+
 #ifdef STRIP_EXTENSION
 static void strip_extension(const char **argv)
 {