[PATCH 12/13] bisect--helper: make `state` optional

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

In preparation for making `git bisect` a real built-in, let's prepare
the `bisect--helper` built-in to handle `git bisect--helper good` and
`git bisect--helper bad`, i.e. do not require the `state` subcommand to
be passed explicitly.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 builtin/bisect--helper.c | 21 ++++++++++++++++++---
 git-bisect.sh            | 17 +----------------
 2 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index b62d3f4d418..c92197b0ea5 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -1348,10 +1348,12 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 	struct bisect_terms terms = { .term_good = NULL, .term_bad = NULL };
 
 	argc = parse_options(argc, argv, prefix, options, git_bisect_usage,
-			     0);
+			     PARSE_OPT_SUBCOMMAND_OPTIONAL);
 
-	argc--;
-	argv++;
+	if (fn) {
+		argc--;
+		argv++;
+	}
 
 	if (fn == bisect_reset) {
 		if (argc > 1)
@@ -1386,6 +1388,19 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		get_terms(&terms);
 	}
 
+	if (!fn) {
+		if (!argc)
+			usage_msg_opt(_("need a command"), git_bisect_usage,
+				      options);
+
+		set_terms(&terms, "bad", "good");
+		get_terms(&terms);
+		if (check_and_set_terms(&terms, argv[0]))
+			usage_msg_optf(_("unknown command: '%s'"),
+				       git_bisect_usage, options, argv[0]);
+		fn = bisect_state;
+	}
+
 	res = fn(&terms, argc, argv, prefix);
 	free_terms(&terms);
 
diff --git a/git-bisect.sh b/git-bisect.sh
index e19847eba0d..c6e12f60f83 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -34,33 +34,18 @@ Please use "git help bisect" to get the full man page.'
 OPTIONS_SPEC=
 . git-sh-setup
 
-TERM_BAD=bad
-TERM_GOOD=good
-
-get_terms () {
-	if test -s "$GIT_DIR/BISECT_TERMS"
-	then
-		{
-		read TERM_BAD
-		read TERM_GOOD
-		} <"$GIT_DIR/BISECT_TERMS"
-	fi
-}
 
 case "$#" in
 0)
 	usage ;;
 *)
 	cmd="$1"
-	get_terms
 	shift
 	case "$cmd" in
 	help)
 		git bisect -h ;;
 	start)
 		git bisect--helper start "$@" ;;
-	bad|good|new|old|"$TERM_BAD"|"$TERM_GOOD")
-		git bisect--helper state "$cmd" "$@" ;;
 	skip)
 		git bisect--helper skip "$@" || exit;;
 	next)
@@ -79,6 +64,6 @@ case "$#" in
 	terms)
 		git bisect--helper terms "$@" || exit;;
 	*)
-		usage ;;
+		git bisect--helper "$cmd" "$@" ;;
 	esac
 esac
-- 
2.38.0.1452.g710f45c7951