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

This patch was contributed only as a tentative "we could introduce a
convenient short option if we do not want to change the default behavior
in the long run" patch, opening the discussion whether other people
agree with deprecating the current behavior in favor of the rescheduling
behavior.

But the consensus on the Git mailing list was that it would make sense
to show a warning in the near future, and flip the default
rebase.rescheduleFailedExec to reschedule failed `exec` commands by
default. See e.g.
<CAGZ79kZL5CRqCDRb6B-EedUm8Z_i4JuSF2=UtwwdRXMitrrOBw@mail.gmail.com>

So let's back out that patch that added the `-y` short option that we
agreed was not necessary or desirable.

This reverts commit 81ef8ee75d.

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

Documentation/git-rebase.txt

@@ -462,12 +462,6 @@ 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

@@ -754,23 +754,6 @@ 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);
@@ -851,7 +834,6 @@ 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"),
@@ -929,9 +911,6 @@ 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

@@ -26,7 +26,6 @@ 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
@@ -263,11 +262,6 @@ 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

@@ -262,9 +262,6 @@ 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
 '