Merge branch 'nd/rebase-forget'

"git rebase" learned "--quit" option, which allows a user to
remove the metadata left by an earlier "git rebase" that was
manually aborted without using "git rebase --abort".

* nd/rebase-forget:
  rebase: add --quit to cleanup rebase, leave everything else untouched

Documentation/git-rebase.txt

@@ -12,7 +12,7 @@ SYNOPSIS
 	[<upstream> [<branch>]]
 'git rebase' [-i | --interactive] [options] [--exec <cmd>] [--onto <newbase>]
 	--root [<branch>]
-'git rebase' --continue | --skip | --abort | --edit-todo
+'git rebase' --continue | --skip | --abort | --quit | --edit-todo
 
 DESCRIPTION
 -----------
@@ -252,6 +252,11 @@ leave out at most one of A and B, in which case it defaults to HEAD.
 	will be reset to where it was when the rebase operation was
 	started.
 
+--quit::
+	Abort the rebase operation but HEAD is not reset back to the
+	original branch. The index and working tree are also left
+	unchanged as a result.
+
 --keep-empty::
 	Keep the commits that do not change anything from its
 	parents in the result.

contrib/completion/git-completion.bash

@@ -1734,10 +1734,10 @@ _git_rebase ()
 {
 	local dir="$(__gitdir)"
 	if [ -f "$dir"/rebase-merge/interactive ]; then
-		__gitcomp "--continue --skip --abort --edit-todo"
+		__gitcomp "--continue --skip --abort --quit --edit-todo"
 		return
 	elif [ -d "$dir"/rebase-apply ] || [ -d "$dir"/rebase-merge ]; then
-		__gitcomp "--continue --skip --abort"
+		__gitcomp "--continue --skip --abort --quit"
 		return
 	fi
 	__git_complete_strategy && return

git-rebase.sh

@@ -43,6 +43,7 @@ continue!          continue
 abort!             abort and check out the original branch
 skip!              skip current patch and continue
 edit-todo!         edit the todo list during an interactive rebase
+quit!              abort but keep HEAD where it is
 "
 . git-sh-setup
 set_reflog_action rebase
@@ -241,7 +242,7 @@ do
 	--verify)
 		ok_to_skip_pre_rebase=
 		;;
-	--continue|--skip|--abort|--edit-todo)
+	--continue|--skip|--abort|--quit|--edit-todo)
 		test $total_argc -eq 2 || usage
 		action=${1##--}
 		;;
@@ -399,6 +400,9 @@ abort)
 	finish_rebase
 	exit
 	;;
+quit)
+	exec rm -rf "$state_dir"
+	;;
 edit-todo)
 	run_specific_rebase
 	;;

t/t3407-rebase-abort.sh

@@ -99,4 +99,28 @@ testrebase() {
 testrebase "" .git/rebase-apply
 testrebase " --merge" .git/rebase-merge
 
+test_expect_success 'rebase --quit' '
+	cd "$work_dir" &&
+	# Clean up the state from the previous one
+	git reset --hard pre-rebase &&
+	test_must_fail git rebase master &&
+	test_path_is_dir .git/rebase-apply &&
+	head_before=$(git rev-parse HEAD) &&
+	git rebase --quit &&
+	test $(git rev-parse HEAD) = $head_before &&
+	test ! -d .git/rebase-apply
+'
+
+test_expect_success 'rebase --merge --quit' '
+	cd "$work_dir" &&
+	# Clean up the state from the previous one
+	git reset --hard pre-rebase &&
+	test_must_fail git rebase --merge master &&
+	test_path_is_dir .git/rebase-merge &&
+	head_before=$(git rev-parse HEAD) &&
+	git rebase --quit &&
+	test $(git rev-parse HEAD) = $head_before &&
+	test ! -d .git/rebase-merge
+'
+
 test_done