Merge branch 'jc/am-3-nonstandard-popt' into maint

The code to synthesize the fake ancestor tree used by 3-way merge
fallback in "git am" was not prepared to read a patch created with
a non-standard -p<num> value.

* jc/am-3-nonstandard-popt:
  test: "am -3" can accept non-standard -p<num>
  am -3: allow nonstandard -p<num> option

1 files changed, 15 insertions, 0 deletions

diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 00d669a3c9..658354a6ce 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -123,6 +123,7 @@ test_expect_success setup '
 	git commit -m "added another file" &&
 
 	git format-patch --stdout master >lorem-move.patch &&
+	git format-patch --no-prefix --stdout master >lorem-zero.patch &&
 
 	git checkout -b rename &&
 	git mv file renamed &&
@@ -276,6 +277,20 @@ test_expect_success 'am -3 falls back to 3-way merge' '
 	git diff --exit-code lorem
 '
 
+test_expect_success 'am -3 -p0 can read --no-prefix patch' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	git checkout -b lorem3 master2 &&
+	sed -n -e "3,\$p" msg >file &&
+	head -n 9 msg >>file &&
+	git add file &&
+	test_tick &&
+	git commit -m "copied stuff" &&
+	git am -3 -p0 lorem-zero.patch &&
+	! test -d .git/rebase-apply &&
+	git diff --exit-code lorem
+'
+
 test_expect_success 'am can rename a file' '
 	grep "^rename from" rename.patch &&
 	rm -fr .git/rebase-apply &&