stash: convert list to builtin

Add stash list to the helper and delete the list_stash function
from the shell script.

Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: ungps

builtin/stash--helper.c

@@ -13,13 +13,19 @@
 #include "rerere.h"
 
 static const char * const git_stash_helper_usage[] = {
+	N_("git stash--helper list [<options>]"),
 	N_("git stash--helper drop [-q|--quiet] [<stash>]"),
 	N_("git stash--helper ( pop | apply ) [--index] [-q|--quiet] [<stash>]"),
 	N_("git stash--helper branch <branchname> [<stash>]"),
 	N_("git stash--helper clear"),
 	NULL
 };
 
+static const char * const git_stash_helper_list_usage[] = {
+	N_("git stash--helper list [<options>]"),
+	NULL
+};
+
 static const char * const git_stash_helper_drop_usage[] = {
 	N_("git stash--helper drop [-q|--quiet] [<stash>]"),
 	NULL
@@ -617,6 +623,29 @@ static int branch_stash(int argc, const char **argv, const char *prefix)
 	return ret;
 }
 
+static int list_stash(int argc, const char **argv, const char *prefix)
+{
+	struct child_process cp = CHILD_PROCESS_INIT;
+	struct option options[] = {
+		OPT_END()
+	};
+
+	argc = parse_options(argc, argv, prefix, options,
+			     git_stash_helper_list_usage,
+			     PARSE_OPT_KEEP_UNKNOWN);
+
+	if (!ref_exists(ref_stash))
+		return 0;
+
+	cp.git_cmd = 1;
+	argv_array_pushl(&cp.args, "log", "--format=%gd: %gs", "-g",
+			 "--first-parent", "-m", NULL);
+	argv_array_pushv(&cp.args, argv);
+	argv_array_push(&cp.args, ref_stash);
+	argv_array_push(&cp.args, "--");
+	return run_command(&cp);
+}
+
 int cmd_stash__helper(int argc, const char **argv, const char *prefix)
 {
 	pid_t pid = getpid();
@@ -647,6 +676,8 @@ int cmd_stash__helper(int argc, const char **argv, const char *prefix)
 		return !!pop_stash(argc, argv, prefix);
 	else if (!strcmp(argv[0], "branch"))
 		return !!branch_stash(argc, argv, prefix);
+	else if (!strcmp(argv[0], "list"))
+		return !!list_stash(argc, argv, prefix);
 
 	usage_msg_opt(xstrfmt(_("unknown subcommand: %s"), argv[0]),
 		      git_stash_helper_usage, options);

git-stash.sh

@@ -399,11 +399,6 @@ have_stash () {
 	git rev-parse --verify --quiet $ref_stash >/dev/null
 }
 
-list_stash () {
-	have_stash || return 0
-	git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
-}
-
 show_stash () {
 	ALLOW_UNKNOWN_FLAGS=t
 	assert_stash_like "$@"
@@ -591,7 +586,7 @@ test -n "$seen_non_option" || set "push" "$@"
 case "$1" in
 list)
 	shift
-	list_stash "$@"
+	git stash--helper list "$@"
 	;;
 show)
 	shift