git am --abort

After failing to apply patches in the middle of a series, "git am --abort"
lets you go back to the original commit.

[jc: doc/help update from Olivier, and fixups for "am -3" squashed in]

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Olivier Marin <dkr@freesurf.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/t/t4151-am-abort.sh b/t/t4151-am-abort.sh
new file mode 100755
index 0000000000..dda7e2c28e
--- /dev/null
+++ b/t/t4151-am-abort.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+test_description='am --abort'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	for i in a b c d e f g
+	do
+		echo $i
+	done >file-1 &&
+	cp file-1 file-2 &&
+	test_tick &&
+	git add file-1 file-2 &&
+	git commit -m initial &&
+	git tag initial &&
+	for i in 2 3 4 5
+	do
+		echo $i >>file-1 &&
+		test_tick &&
+		git commit -a -m $i || break
+	done &&
+	git format-patch initial &&
+	git checkout -b side initial &&
+	echo local change >file-2-expect
+'
+
+for with3 in '' ' -3'
+do
+	test_expect_success "am$with3 stops at a patch that does not apply" '
+
+		git reset --hard initial &&
+		cp file-2-expect file-2 &&
+
+		test_must_fail git am$with3 000[124]-*.patch &&
+		git log --pretty=tformat:%s >actual &&
+		for i in 3 2 initial
+		do
+			echo $i
+		done >expect &&
+		test_cmp expect actual
+	'
+
+	test_expect_success "am --abort goes back after failed am$with3" '
+		git-am --abort &&
+		git rev-parse HEAD >actual &&
+		git rev-parse initial >expect &&
+		test_cmp expect actual &&
+		test_cmp file-2-expect file-2 &&
+		git diff-index --exit-code --cached HEAD &&
+		test ! -f .git/rr-cache/MERGE_RR
+	'
+
+done
+
+test_done