Merge branch 'rr/rebase-autostash-fix' into maint

The autostash mode of "git rebase -i" did not restore the dirty
working tree state if the user aborted the interactive rebase by
emptying the insn sheet.

* rr/rebase-autostash-fix:
  rebase -i: test "Nothing to do" case with autostash
  rebase -i: handle "Nothing to do" case with autostash

Author: gitster

git-rebase--interactive.sh

@@ -1049,14 +1049,14 @@ fi
 
 
 has_action "$todo" ||
-	die_abort "Nothing to do"
+	return 2
 
 cp "$todo" "$todo".backup
 git_sequence_editor "$todo" ||
 	die_abort "Could not execute editor"
 
 has_action "$todo" ||
-	die_abort "Nothing to do"
+	return 2
 
 expand_todo_ids
 

git-rebase.sh

@@ -155,7 +155,7 @@ move_to_original_branch () {
 	esac
 }
 
-finish_rebase () {
+apply_autostash () {
 	if test -f "$state_dir/autostash"
 	then
 		stash_sha1=$(cat "$state_dir/autostash")
@@ -171,6 +171,10 @@ You can run "git stash pop" or "git stash drop" at any time.
 '
 		fi
 	fi
+}
+
+finish_rebase () {
+	apply_autostash &&
 	git gc --auto &&
 	rm -rf "$state_dir"
 }
@@ -186,6 +190,11 @@ run_specific_rebase () {
 	if test $ret -eq 0
 	then
 		finish_rebase
+	elif test $ret -eq 2 # special exit status for rebase -i
+	then
+		apply_autostash &&
+		rm -rf "$state_dir" &&
+		die "Nothing to do"
 	fi
 	exit $ret
 }

t/t3420-rebase-autostash.sh

@@ -167,4 +167,19 @@ testrebase "" .git/rebase-apply
 testrebase " --merge" .git/rebase-merge
 testrebase " --interactive" .git/rebase-merge
 
+test_expect_success 'abort rebase -i with --autostash' '
+	test_when_finished "git reset --hard" &&
+	echo uncommited-content >file0 &&
+	(
+		write_script abort-editor.sh <<-\EOF &&
+			echo >"$1"
+		EOF
+		test_set_editor "$(pwd)/abort-editor.sh" &&
+		test_must_fail git rebase -i --autostash HEAD^ &&
+		rm -f abort-editor.sh
+	) &&
+	echo uncommited-content >expected &&
+	test_cmp expected file0
+'
+
 test_done