rebase: introduce a shortcut for --reschedule-failed-exec

It is a bit cumbersome to write out the `--reschedule-failed-exec`
option before `-x <cmd>` all the time; let's introduce a convenient
option to do both at the same time: `-y <cmd>`.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-rebase.txt

@@ -462,6 +462,12 @@ without an explicit `--interactive`.
 +
 See also INCOMPATIBLE OPTIONS below.
 
+-y <cmd>::
+	This is the same as passing `--reschedule-failed-exec` before
+	`-x <cmd>`, i.e. it appends the specified `exec` command and
+	turns on the mode where failed `exec` commands are automatically
+	rescheduled.
+
 --root::
 	Rebase all commits reachable from <branch>, instead of
 	limiting them with an <upstream>.  This allows you to rebase

builtin/rebase.c

@@ -754,6 +754,23 @@ static int parse_opt_interactive(const struct option *opt, const char *arg,
 	return 0;
 }
 
+struct opt_y {
+	struct string_list *list;
+	struct rebase_options *options;
+};
+
+static int parse_opt_y(const struct option *opt, const char *arg, int unset)
+{
+	struct opt_y *o = opt->value;
+
+	if (unset || !arg)
+		return -1;
+
+	o->options->reschedule_failed_exec = 1;
+	string_list_append(o->list, arg);
+	return 0;
+}
+
 static void NORETURN error_on_missing_default_upstream(void)
 {
 	struct branch *current_branch = branch_get(NULL);
@@ -834,6 +851,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	struct string_list strategy_options = STRING_LIST_INIT_NODUP;
 	struct object_id squash_onto;
 	char *squash_onto_name = NULL;
+	struct opt_y opt_y = { .list = &exec, .options = &options };
 	struct option builtin_rebase_options[] = {
 		OPT_STRING(0, "onto", &options.onto_name,
 			   N_("revision"),
@@ -911,6 +929,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 		OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
 				N_("add exec lines after each commit of the "
 				   "editable list")),
+		{ OPTION_CALLBACK, 'y', NULL, &opt_y, N_("<cmd>"),
+			N_("same as --reschedule-failed-exec -x <cmd>"),
+			PARSE_OPT_NONEG, parse_opt_y },
 		OPT_BOOL(0, "allow-empty-message",
 			 &options.allow_empty_message,
 			 N_("allow rebasing commits with empty messages")),

git-legacy-rebase.sh

@@ -26,6 +26,7 @@ f,force-rebase!    cherry-pick all commits, even if unchanged
 m,merge!           use merging strategies to rebase
 i,interactive!     let the user edit the list of commits to rebase
 x,exec=!           add exec lines after each commit of the editable list
+y=!                same as --reschedule-failed-exec -x
 k,keep-empty	   preserve empty commits during rebase
 allow-empty-message allow rebasing commits with empty messages
 stat!              display a diffstat of what changed upstream
@@ -262,6 +263,11 @@ do
 		cmd="${cmd}exec ${1#--exec=}${LF}"
 		test -z "$interactive_rebase" && interactive_rebase=implied
 		;;
+	-y*)
+		reschedule_failed_exec=--reschedule-failed-exec
+		cmd="${cmd}exec ${1#-y}${LF}"
+		test -z "$interactive_rebase" && interactive_rebase=implied
+		;;
 	--interactive)
 		interactive_rebase=explicit
 		;;

t/t3418-rebase-continue.sh

@@ -262,6 +262,9 @@ test_expect_success '--reschedule-failed-exec' '
 	test_must_fail git -c rebase.rescheduleFailedExec=true \
 		rebase -x false HEAD^ 2>err &&
 	grep "^exec false" .git/rebase-merge/git-rebase-todo &&
+	test_i18ngrep "has been rescheduled" err &&
+	git rebase --abort &&
+	test_must_fail git rebase -y false HEAD^ 2>err &&
 	test_i18ngrep "has been rescheduled" err
 '