#!/bin/sh
#
# Copyright (c) 2006 Junio C Hamano
#

test_description='various format-patch tests'

GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-terminal.sh

test_expect_success setup '
	for i in 1 2 3 4 5 6 7 8 9 10; do echo "$i"; done >file &&
	cat file >elif &&
	git add file elif &&
	test_tick &&
	git commit -m Initial &&
	git checkout -b side &&

	for i in 1 2 5 6 A B C 7 8 9 10; do echo "$i"; done >file &&
	test_chmod +x elif &&
	test_tick &&
	git commit -m "Side changes #1" &&

	for i in D E F; do echo "$i"; done >>file &&
	git update-index file &&
	test_tick &&
	git commit -m "Side changes #2" &&
	git tag C2 &&

	for i in 5 6 1 2 3 A 4 B C 7 8 9 10 D E F; do echo "$i"; done >file &&
	git update-index file &&
	test_tick &&
	git commit -m "Side changes #3 with \\n backslash-n in it." &&

	git checkout main &&
	git diff-tree -p C2 >patch &&
	git apply --index <patch &&
	test_tick &&
	git commit -m "Main accepts moral equivalent of #2" &&

	git checkout side &&
	git checkout -b patchid &&
	for i in 5 6 1 2 3 A 4 B C 7 8 9 10 D E F; do echo "$i"; done >file2 &&
	for i in 1 2 3 A 4 B C 7 8 9 10 D E F 5 6; do echo "$i"; done >file3 &&
	for i in 8 9 10; do echo "$i"; done >file &&
	git add file file2 file3 &&
	test_tick &&
	git commit -m "patchid 1" &&
	for i in 4 A B 7 8 9 10; do echo "$i"; done >file2 &&
	for i in 8 9 10 5 6; do echo "$i"; done >file3 &&
	git add file2 file3 &&
	test_tick &&
	git commit -m "patchid 2" &&
	for i in 10 5 6; do echo "$i"; done >file &&
	git add file &&
	test_tick &&
	git commit -m "patchid 3" &&

	git checkout main
'

test_expect_success 'format-patch --ignore-if-in-upstream' '
	git format-patch --stdout main..side >patch0 &&
	grep "^From " patch0 >from0 &&
	test_line_count = 3 from0
'

test_expect_success 'format-patch --ignore-if-in-upstream' '
	git format-patch --stdout \
		--ignore-if-in-upstream main..side >patch1 &&
	grep "^From " patch1 >from1 &&
	test_line_count = 2 from1
'

test_expect_success 'format-patch --ignore-if-in-upstream handles tags' '
	git tag -a v1 -m tag side &&
	git tag -a v2 -m tag main &&
	git format-patch --stdout --ignore-if-in-upstream v2..v1 >patch1 &&
	grep "^From " patch1 >from1 &&
	test_line_count = 2 from1
'

test_expect_success "format-patch doesn't consider merge commits" '
	git checkout -b feature main &&
	echo "Another line" >>file &&
	test_tick &&
	git commit -am "Feature branch change #1" &&
	echo "Yet another line" >>file &&
	test_tick &&
	git commit -am "Feature branch change #2" &&
	git checkout -b merger main &&
	test_tick &&
	git merge --no-ff feature &&
	git format-patch -3 --stdout >patch &&
	grep "^From " patch >from &&
	test_line_count = 3 from
'

test_expect_success 'format-patch result applies' '
	git checkout -b rebuild-0 main &&
	git am -3 patch0 &&
	git rev-list main.. >list &&
	test_line_count = 2 list
'

test_expect_success 'format-patch --ignore-if-in-upstream result applies' '
	git checkout -b rebuild-1 main &&
	git am -3 patch1 &&
	git rev-list main.. >list &&
	test_line_count = 2 list
'

test_expect_success 'commit did not screw up the log message' '
	git cat-file commit side >actual &&
	grep "^Side .* with .* backslash-n" actual
'

test_expect_success 'format-patch did not screw up the log message' '
	grep "^Subject: .*Side changes #3 with .* backslash-n" patch0 &&
	grep "^Subject: .*Side changes #3 with .* backslash-n" patch1
'

test_expect_success 'replay did not screw up the log message' '
	git cat-file commit rebuild-1 >actual &&
	grep "^Side .* with .* backslash-n" actual
'

test_expect_success 'extra headers' '
	git config format.headers "To: R E Cipient <rcipient@example.com>
" &&
	git config --add format.headers "Cc: S E Cipient <scipient@example.com>
" &&
	git format-patch --stdout main..side >patch2 &&
	sed -e "/^\$/q" patch2 >hdrs2 &&
	grep "^To: R E Cipient <rcipient@example.com>\$" hdrs2 &&
	grep "^Cc: S E Cipient <scipient@example.com>\$" hdrs2
'

test_expect_success 'extra headers without newlines' '
	git config --replace-all format.headers "To: R E Cipient <rcipient@example.com>" &&
	git config --add format.headers "Cc: S E Cipient <scipient@example.com>" &&
	git format-patch --stdout main..side >patch3 &&
	sed -e "/^\$/q" patch3 >hdrs3 &&
	grep "^To: R E Cipient <rcipient@example.com>\$" hdrs3 &&
	grep "^Cc: S E Cipient <scipient@example.com>\$" hdrs3
'

test_expect_success 'extra headers with multiple To:s' '
	git config --replace-all format.headers "To: R E Cipient <rcipient@example.com>" &&
	git config --add format.headers "To: S E Cipient <scipient@example.com>" &&
	git format-patch --stdout main..side >patch4 &&
	sed -e "/^\$/q" patch4 >hdrs4 &&
	grep "^To: R E Cipient <rcipient@example.com>,\$" hdrs4 &&
	grep "^ *S E Cipient <scipient@example.com>\$" hdrs4
'

test_expect_success 'additional command line cc (ascii)' '
	git config --replace-all format.headers "Cc: R E Cipient <rcipient@example.com>" &&
	git format-patch --cc="S E Cipient <scipient@example.com>" --stdout main..side >patch5 &&
	sed -e "/^\$/q" patch5 >hdrs5 &&
	grep "^Cc: R E Cipient <rcipient@example.com>,\$" hdrs5 &&
	grep "^ *S E Cipient <scipient@example.com>\$" hdrs5
'

test_expect_failure 'additional command line cc (rfc822)' '
	git config --replace-all format.headers "Cc: R E Cipient <rcipient@example.com>" &&
	git format-patch --cc="S. E. Cipient <scipient@example.com>" --stdout main..side >patch5 &&
	sed -e "/^\$/q" patch5 >hdrs5 &&
	grep "^Cc: R E Cipient <rcipient@example.com>,\$" hdrs5 &&
	grep "^ *\"S. E. Cipient\" <scipient@example.com>\$" hdrs5
'

test_expect_success 'command line headers' '
	git config --unset-all format.headers &&
	git format-patch --add-header="Cc: R E Cipient <rcipient@example.com>" --stdout main..side >patch6 &&
	sed -e "/^\$/q" patch6 >hdrs6 &&
	grep "^Cc: R E Cipient <rcipient@example.com>\$" hdrs6
'

test_expect_success 'configuration headers and command line headers' '
	git config --replace-all format.headers "Cc: R E Cipient <rcipient@example.com>" &&
	git format-patch --add-header="Cc: S E Cipient <scipient@example.com>" --stdout main..side >patch7 &&
	sed -e "/^\$/q" patch7 >hdrs7 &&
	grep "^Cc: R E Cipient <rcipient@example.com>,\$" hdrs7 &&
	grep "^ *S E Cipient <scipient@example.com>\$" hdrs7
'

test_expect_success 'command line To: header (ascii)' '
	git config --unset-all format.headers &&
	git format-patch --to="R E Cipient <rcipient@example.com>" --stdout main..side >patch8 &&
	sed -e "/^\$/q" patch8 >hdrs8 &&
	grep "^To: R E Cipient <rcipient@example.com>\$" hdrs8
'

test_expect_failure 'command line To: header (rfc822)' '
	git format-patch --to="R. E. Cipient <rcipient@example.com>" --stdout main..side >patch8 &&
	sed -e "/^\$/q" patch8 >hdrs8 &&
	grep "^To: \"R. E. Cipient\" <rcipient@example.com>\$" hdrs8
'

test_expect_failure 'command line To: header (rfc2047)' '
	git format-patch --to="R Ä Cipient <rcipient@example.com>" --stdout main..side >patch8 &&
	sed -e "/^\$/q" patch8 >hdrs8 &&
	grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@example.com>\$" hdrs8
'

test_expect_success 'configuration To: header (ascii)' '
	git config format.to "R E Cipient <rcipient@example.com>" &&
	git format-patch --stdout main..side >patch9 &&
	sed -e "/^\$/q" patch9 >hdrs9 &&
	grep "^To: R E Cipient <rcipient@example.com>\$" hdrs9
'

test_expect_failure 'configuration To: header (rfc822)' '
	git config format.to "R. E. Cipient <rcipient@example.com>" &&
	git format-patch --stdout main..side >patch9 &&
	sed -e "/^\$/q" patch9 >hdrs9 &&
	grep "^To: \"R. E. Cipient\" <rcipient@example.com>\$" hdrs9
'

test_expect_failure 'configuration To: header (rfc2047)' '
	git config format.to "R Ä Cipient <rcipient@example.com>" &&
	git format-patch --stdout main..side >patch9 &&
	sed -e "/^\$/q" patch9 >hdrs9 &&
	grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@example.com>\$" hdrs9
'

# check_patch <patch>: Verify that <patch> looks like a half-sane
# patch email to avoid a false positive with !grep
check_patch () {
	grep -e "^From:" "$1" &&
	grep -e "^Date:" "$1" &&
	grep -e "^Subject:" "$1"
}

test_expect_success 'format.from=false' '
	git -c format.from=false format-patch --stdout main..side >patch &&
	sed -e "/^\$/q" patch >hdrs &&
	check_patch patch &&
	! grep "^From: C O Mitter <committer@example.com>\$" hdrs
'

test_expect_success 'format.from=true' '
	git -c format.from=true format-patch --stdout main..side >patch &&
	sed -e "/^\$/q" patch >hdrs &&
	check_patch hdrs &&
	grep "^From: C O Mitter <committer@example.com>\$" hdrs
'

test_expect_success 'format.from with address' '
	git -c format.from="F R Om <from@example.com>" format-patch --stdout main..side >patch &&
	sed -e "/^\$/q" patch >hdrs &&
	check_patch hdrs &&
	grep "^From: F R Om <from@example.com>\$" hdrs
'

test_expect_success '--no-from overrides format.from' '
	git -c format.from="F R Om <from@example.com>" format-patch --no-from --stdout main..side >patch &&
	sed -e "/^\$/q" patch >hdrs &&
	check_patch hdrs &&
	! grep "^From: F R Om <from@example.com>\$" hdrs
'

test_expect_success '--from overrides format.from' '
	git -c format.from="F R Om <from@example.com>" format-patch --from --stdout main..side >patch &&
	sed -e "/^\$/q" patch >hdrs &&
	check_patch hdrs &&
	! grep "^From: F R Om <from@example.com>\$" hdrs
'

test_expect_success '--no-to overrides config.to' '
	git config --replace-all format.to \
		"R E Cipient <rcipient@example.com>" &&
	git format-patch --no-to --stdout main..side >patch10 &&
	sed -e "/^\$/q" patch10 >hdrs10 &&
	check_patch hdrs10 &&
	! grep "^To: R E Cipient <rcipient@example.com>\$" hdrs10
'

test_expect_success '--no-to and --to replaces config.to' '
	git config --replace-all format.to \
		"Someone <someone@out.there>" &&
	git format-patch --no-to --to="Someone Else <else@out.there>" \
		--stdout main..side >patch11 &&
	sed -e "/^\$/q" patch11 >hdrs11 &&
	check_patch hdrs11 &&
	! grep "^To: Someone <someone@out.there>\$" hdrs11 &&
	grep "^To: Someone Else <else@out.there>\$" hdrs11
'

test_expect_success '--no-cc overrides config.cc' '
	git config --replace-all format.cc \
		"C E Cipient <rcipient@example.com>" &&
	git format-patch --no-cc --stdout main..side >patch12 &&
	sed -e "/^\$/q" patch12 >hdrs12 &&
	check_patch hdrs12 &&
	! grep "^Cc: C E Cipient <rcipient@example.com>\$" hdrs12
'

test_expect_success '--no-add-header overrides config.headers' '
	git config --replace-all format.headers \
		"Header1: B E Cipient <rcipient@example.com>" &&
	git format-patch --no-add-header --stdout main..side >patch13 &&
	sed -e "/^\$/q" patch13 >hdrs13 &&
	check_patch hdrs13 &&
	! grep "^Header1: B E Cipient <rcipient@example.com>\$" hdrs13
'

test_expect_success 'multiple files' '
	rm -rf patches/ &&
	git checkout side &&
	git format-patch -o patches/ main &&
	ls patches/0001-Side-changes-1.patch patches/0002-Side-changes-2.patch patches/0003-Side-changes-3-with-n-backslash-n-in-it.patch
'

test_expect_success 'filename length limit' '
	test_when_finished "rm -f 000*" &&
	rm -rf 000[1-9]-*.patch &&
	for len in 15 25 35
	do
		git format-patch --filename-max-length=$len -3 side &&
		max=$(
			for patch in 000[1-9]-*.patch
			do
				echo "$patch" | wc -c
			done |
			sort -nr |
			head -n 1
		) &&
		test $max -le $len || return 1
	done
'

test_expect_success 'filename length limit from config' '
	test_when_finished "rm -f 000*" &&
	rm -rf 000[1-9]-*.patch &&
	for len in 15 25 35
	do
		git -c format.filenameMaxLength=$len format-patch -3 side &&
		max=$(
			for patch in 000[1-9]-*.patch
			do
				echo "$patch" | wc -c
			done |
			sort -nr |
			head -n 1
		) &&
		test $max -le $len || return 1
	done
'

test_expect_success 'filename limit applies only to basename' '
	test_when_finished "rm -rf patches/" &&
	rm -rf patches/ &&
	for len in 15 25 35
	do
		git format-patch -o patches --filename-max-length=$len -3 side &&
		max=$(
			for patch in patches/000[1-9]-*.patch
			do
				echo "${patch#patches/}" | wc -c
			done |
			sort -nr |
			head -n 1
		) &&
		test $max -le $len || return 1
	done
'

test_expect_success 'reroll count' '
	rm -fr patches &&
	git format-patch -o patches --cover-letter --reroll-count 4 main..side >list &&
	! grep -v "^patches/v4-000[0-3]-" list &&
	sed -n -e "/^Subject: /p" $(cat list) >subjects &&
	! grep -v "^Subject: \[PATCH v4 [0-3]/3\] " subjects
'

test_expect_success 'reroll count (-v)' '
	rm -fr patches &&
	git format-patch -o patches --cover-letter -v4 main..side >list &&
	! grep -v "^patches/v4-000[0-3]-" list &&
	sed -n -e "/^Subject: /p" $(cat list) >subjects &&
	! grep -v "^Subject: \[PATCH v4 [0-3]/3\] " subjects
'

check_threading () {
	expect="$1" &&
	shift &&
	git format-patch --stdout "$@" >patch &&
	# Prints everything between the Message-ID and In-Reply-To,
	# and replaces all Message-ID-lookalikes by a sequence number
	perl -ne '
		if (/^(message-id|references|in-reply-to)/i) {
			$printing = 1;
		} elsif (/^\S/) {
			$printing = 0;
		}
		if ($printing) {
			$h{$1}=$i++ if (/<([^>]+)>/ and !exists $h{$1});
			for $k (keys %h) {s/$k/$h{$k}/};
			print;
		}
		print "---\n" if /^From /i;
	' <patch >actual &&
	test_cmp "$expect" actual
}

cat >>expect.no-threading <<EOF
---
---
---
EOF

test_expect_success 'no threading' '
	git checkout side &&
	check_threading expect.no-threading main
'

cat >expect.thread <<EOF
---
Message-Id: <0>
---
Message-Id: <1>
In-Reply-To: <0>
References: <0>
---
Message-Id: <2>
In-Reply-To: <0>
References: <0>
EOF

test_expect_success 'thread' '
	check_threading expect.thread --thread main
'

cat >expect.in-reply-to <<EOF
---
Message-Id: <0>
In-Reply-To: <1>
References: <1>
---
Message-Id: <2>
In-Reply-To: <1>
References: <1>
---
Message-Id: <3>
In-Reply-To: <1>
References: <1>
EOF

test_expect_success 'thread in-reply-to' '
	check_threading expect.in-reply-to --in-reply-to="<test.message>" \
		--thread main
'

cat >expect.cover-letter <<EOF
---
Message-Id: <0>
---
Message-Id: <1>
In-Reply-To: <0>
References: <0>
---
Message-Id: <2>
In-Reply-To: <0>
References: <0>
---
Message-Id: <3>
In-Reply-To: <0>
References: <0>
EOF

test_expect_success 'thread cover-letter' '
	check_threading expect.cover-letter --cover-letter --thread main
'

cat >expect.cl-irt <<EOF
---
Message-Id: <0>
In-Reply-To: <1>
References: <1>
---
Message-Id: <2>
In-Reply-To: <0>
References: <1>
	<0>
---
Message-Id: <3>
In-Reply-To: <0>
References: <1>
	<0>
---
Message-Id: <4>
In-Reply-To: <0>
References: <1>
	<0>
EOF

test_expect_success 'thread cover-letter in-reply-to' '
	check_threading expect.cl-irt --cover-letter \
		--in-reply-to="<test.message>" --thread main
'

test_expect_success 'thread explicit shallow' '
	check_threading expect.cl-irt --cover-letter \
		--in-reply-to="<test.message>" --thread=shallow main
'

cat >expect.deep <<EOF
---
Message-Id: <0>
---
Message-Id: <1>
In-Reply-To: <0>
References: <0>
---
Message-Id: <2>
In-Reply-To: <1>
References: <0>
	<1>
EOF

test_expect_success 'thread deep' '
	check_threading expect.deep --thread=deep main
'

cat >expect.deep-irt <<EOF
---
Message-Id: <0>
In-Reply-To: <1>
References: <1>
---
Message-Id: <2>
In-Reply-To: <0>
References: <1>
	<0>
---
Message-Id: <3>
In-Reply-To: <2>
References: <1>
	<0>
	<2>
EOF

test_expect_success 'thread deep in-reply-to' '
	check_threading expect.deep-irt  --thread=deep \
		--in-reply-to="<test.message>" main
'

cat >expect.deep-cl <<EOF
---
Message-Id: <0>
---
Message-Id: <1>
In-Reply-To: <0>
References: <0>
---
Message-Id: <2>
In-Reply-To: <1>
References: <0>
	<1>
---
Message-Id: <3>
In-Reply-To: <2>
References: <0>
	<1>
	<2>
EOF

test_expect_success 'thread deep cover-letter' '
	check_threading expect.deep-cl --cover-letter --thread=deep main
'

cat >expect.deep-cl-irt <<EOF
---
Message-Id: <0>
In-Reply-To: <1>
References: <1>
---
Message-Id: <2>
In-Reply-To: <0>
References: <1>
	<0>
---
Message-Id: <3>
In-Reply-To: <2>
References: <1>
	<0>
	<2>
---
Message-Id: <4>
In-Reply-To: <3>
References: <1>
	<0>
	<2>
	<3>
EOF

test_expect_success 'thread deep cover-letter in-reply-to' '
	check_threading expect.deep-cl-irt --cover-letter \
		--in-reply-to="<test.message>" --thread=deep main
'

test_expect_success 'thread via config' '
	test_config format.thread true &&
	check_threading expect.thread main
'

test_expect_success 'thread deep via config' '
	test_config format.thread deep &&
	check_threading expect.deep main
'

test_expect_success 'thread config + override' '
	test_config format.thread deep &&
	check_threading expect.thread --thread main
'

test_expect_success 'thread config + --no-thread' '
	test_config format.thread deep &&
	check_threading expect.no-threading --no-thread main
'

test_expect_success 'excessive subject' '
	rm -rf patches/ &&
	git checkout side &&
	before=$(git hash-object file) &&
	before=$(git rev-parse --short $before) &&
	for i in 5 6 1 2 3 A 4 B C 7 8 9 10 D E F; do echo "$i"; done >>file &&
	after=$(git hash-object file) &&
	after=$(git rev-parse --short $after) &&
	git update-index file &&
	git commit -m "This is an excessively long subject line for a message due to the habit some projects have of not having a short, one-line subject at the start of the commit message, but rather sticking a whole paragraph right at the start as the only thing in the commit message. It had better not become the filename for the patch." &&
	git format-patch -o patches/ main..side &&
	ls patches/0004-This-is-an-excessively-long-subject-line-for-a-messa.patch
'

test_expect_success 'failure to write cover-letter aborts gracefully' '
	test_when_finished "rmdir 0000-cover-letter.patch" &&
	mkdir 0000-cover-letter.patch &&
	test_must_fail git format-patch --no-renames --cover-letter -1
'

test_expect_success 'cover-letter inherits diff options' '
	git mv file foo &&
	git commit -m foo &&
	git format-patch --no-renames --cover-letter -1 &&
	check_patch 0000-cover-letter.patch &&
	! grep "file => foo .* 0 *\$" 0000-cover-letter.patch &&
	git format-patch --cover-letter -1 -M &&
	grep "file => foo .* 0 *\$" 0000-cover-letter.patch
'

cat >expect <<EOF
  This is an excessively long subject line for a message due to the
    habit some projects have of not having a short, one-line subject at
    the start of the commit message, but rather sticking a whole
    paragraph right at the start as the only thing in the commit
    message. It had better not become the filename for the patch.
  foo

EOF

test_expect_success 'shortlog of cover-letter wraps overly-long onelines' '
	git format-patch --cover-letter -2 &&
	sed -e "1,/A U Thor/d" -e "/^\$/q" 0000-cover-letter.patch >output &&
	test_cmp expect output
'

cat >expect <<EOF
index $before..$after 100644
--- a/file
+++ b/file
@@ -13,4 +13,20 @@ C
 10
 D
 E
 F
+5
EOF

test_expect_success 'format-patch respects -U' '
	git format-patch -U4 -2 &&
	sed -e "1,/^diff/d" -e "/^+5/q" \
		<0001-This-is-an-excessively-long-subject-line-for-a-messa.patch \
		>output &&
	test_cmp expect output
'

cat >expect <<EOF

diff --git a/file b/file
index $before..$after 100644
--- a/file
+++ b/file
@@ -14,3 +14,19 @@ C
 D
 E
 F
+5
EOF

test_expect_success 'format-patch -p suppresses stat' '
	git format-patch -p -2 &&
	sed -e "1,/^\$/d" -e "/^+5/q" 0001-This-is-an-excessively-long-subject-line-for-a-messa.patch >output &&
	test_cmp expect output
'

test_expect_success 'format-patch from a subdirectory (1)' '
	filename=$(
		rm -rf sub &&
		mkdir -p sub/dir &&
		cd sub/dir &&
		git format-patch -1
	) &&
	case "$filename" in
	0*)
		;; # ok
	*)
		echo "Oops? $filename"
		false
		;;
	esac &&
	test -f "$filename"
'

test_expect_success 'format-patch from a subdirectory (2)' '
	filename=$(
		rm -rf sub &&
		mkdir -p sub/dir &&
		cd sub/dir &&
		git format-patch -1 -o ..
	) &&
	case "$filename" in
	../0*)
		;; # ok
	*)
		echo "Oops? $filename"
		false
		;;
	esac &&
	basename=$(expr "$filename" : ".*/\(.*\)") &&
	test -f "sub/$basename"
'

test_expect_success 'format-patch from a subdirectory (3)' '
	rm -f 0* &&
	filename=$(
		rm -rf sub &&
		mkdir -p sub/dir &&
		cd sub/dir &&
		git format-patch -1 -o "$TRASH_DIRECTORY"
	) &&
	basename=$(expr "$filename" : ".*/\(.*\)") &&
	test -f "$basename"
'

test_expect_success 'format-patch --in-reply-to' '
	git format-patch -1 --stdout --in-reply-to "baz@foo.bar" >patch8 &&
	grep "^In-Reply-To: <baz@foo.bar>" patch8 &&
	grep "^References: <baz@foo.bar>" patch8
'

test_expect_success 'format-patch --signoff' '
	git format-patch -1 --signoff --stdout >out &&
	grep "^Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>" out
'

test_expect_success 'format-patch --notes --signoff' '
	git notes --ref test add -m "test message" HEAD &&
	git format-patch -1 --signoff --stdout --notes=test >out &&
	# Three dashes must come after S-o-b
	! sed "/^Signed-off-by: /q" out | grep "test message" &&
	sed "1,/^Signed-off-by: /d" out | grep "test message" &&
	# Notes message must come after three dashes
	! sed "/^---$/q" out | grep "test message" &&
	sed "1,/^---$/d" out | grep "test message"
'

test_expect_success 'format-patch notes output control' '
	git notes add -m "notes config message" HEAD &&
	test_when_finished git notes remove HEAD &&

	git format-patch -1 --stdout >out &&
	! grep "notes config message" out &&
	git format-patch -1 --stdout --notes >out &&
	grep "notes config message" out &&
	git format-patch -1 --stdout --no-notes >out &&
	! grep "notes config message" out &&
	git format-patch -1 --stdout --notes --no-notes >out &&
	! grep "notes config message" out &&
	git format-patch -1 --stdout --no-notes --notes >out &&
	grep "notes config message" out &&

	test_config format.notes true &&
	git format-patch -1 --stdout >out &&
	grep "notes config message" out &&
	git format-patch -1 --stdout --notes >out &&
	grep "notes config message" out &&
	git format-patch -1 --stdout --no-notes >out &&
	! grep "notes config message" out &&
	git format-patch -1 --stdout --notes --no-notes >out &&
	! grep "notes config message" out &&
	git format-patch -1 --stdout --no-notes --notes >out &&
	grep "notes config message" out
'

test_expect_success 'format-patch with multiple notes refs' '
	git notes --ref note1 add -m "this is note 1" HEAD &&
	test_when_finished git notes --ref note1 remove HEAD &&
	git notes --ref note2 add -m "this is note 2" HEAD &&
	test_when_finished git notes --ref note2 remove HEAD &&

	git format-patch -1 --stdout >out &&
	! grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git format-patch -1 --stdout --notes=note1 >out &&
	grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git format-patch -1 --stdout --notes=note2 >out &&
	! grep "this is note 1" out &&
	grep "this is note 2" out &&
	git format-patch -1 --stdout --notes=note1 --notes=note2 >out &&
	grep "this is note 1" out &&
	grep "this is note 2" out &&

	test_config format.notes note1 &&
	git format-patch -1 --stdout >out &&
	grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git format-patch -1 --stdout --no-notes >out &&
	! grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git format-patch -1 --stdout --notes=note2 >out &&
	grep "this is note 1" out &&
	grep "this is note 2" out &&
	git format-patch -1 --stdout --no-notes --notes=note2 >out &&
	! grep "this is note 1" out &&
	grep "this is note 2" out &&

	git config --add format.notes note2 &&
	git format-patch -1 --stdout >out &&
	grep "this is note 1" out &&
	grep "this is note 2" out &&
	git format-patch -1 --stdout --no-notes >out &&
	! grep "this is note 1" out &&
	! grep "this is note 2" out
'

test_expect_success 'format-patch with multiple notes refs in config' '
	test_when_finished "test_unconfig format.notes" &&

	git notes --ref note1 add -m "this is note 1" HEAD &&
	test_when_finished git notes --ref note1 remove HEAD &&
	git notes --ref note2 add -m "this is note 2" HEAD &&
	test_when_finished git notes --ref note2 remove HEAD &&

	git config format.notes note1 &&
	git format-patch -1 --stdout >out &&
	grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git config format.notes note2 &&
	git format-patch -1 --stdout >out &&
	! grep "this is note 1" out &&
	grep "this is note 2" out &&
	git config --add format.notes note1 &&
	git format-patch -1 --stdout >out &&
	grep "this is note 1" out &&
	grep "this is note 2" out &&

	git config --replace-all format.notes note1 &&
	git config --add format.notes false &&
	git format-patch -1 --stdout >out &&
	! grep "this is note 1" out &&
	! grep "this is note 2" out &&
	git config --add format.notes note2 &&
	git format-patch -1 --stdout >out &&
	! grep "this is note 1" out &&
	grep "this is note 2" out
'

echo "fatal: --name-only does not make sense" >expect.name-only
echo "fatal: --name-status does not make sense" >expect.name-status
echo "fatal: --check does not make sense" >expect.check

test_expect_success 'options no longer allowed for format-patch' '
	test_must_fail git format-patch --name-only 2>output &&
	test_cmp expect.name-only output &&
	test_must_fail git format-patch --name-status 2>output &&
	test_cmp expect.name-status output &&
	test_must_fail git format-patch --check 2>output &&
	test_cmp expect.check output
'

test_expect_success 'format-patch --numstat should produce a patch' '
	git format-patch --numstat --stdout main..side >output &&
	grep "^diff --git a/" output >diff &&
	test_line_count = 5 diff
'

test_expect_success 'format-patch -- <path>' '
	git format-patch main..side -- file 2>error &&
	! grep "Use .--" error
'

test_expect_success 'format-patch --ignore-if-in-upstream HEAD' '
	git format-patch --ignore-if-in-upstream HEAD
'

test_expect_success 'get git version' '
	git_version=$(git --version) &&
	git_version=${git_version##* }
'

signature() {
	printf "%s\n%s\n\n" "-- " "${1:-$git_version}"
}

test_expect_success 'format-patch default signature' '
	git format-patch --stdout -1 >patch &&
	tail -n 3 patch >output &&
	signature >expect &&
	test_cmp expect output
'

test_expect_success 'format-patch --signature' '
	git format-patch --stdout --signature="my sig" -1 >patch &&
	tail -n 3 patch >output &&
	signature "my sig" >expect &&
	test_cmp expect output
'

test_expect_success 'format-patch with format.signature config' '
	git config format.signature "config sig" &&
	git format-patch --stdout -1 >output &&
	grep "config sig" output
'

test_expect_success 'format-patch --signature overrides format.signature' '
	git config format.signature "config sig" &&
	git format-patch --stdout --signature="overrides" -1 >output &&
	! grep "config sig" output &&
	grep "overrides" output
'

test_expect_success 'format-patch --no-signature ignores format.signature' '
	git config format.signature "config sig" &&
	git format-patch --stdout --signature="my sig" --no-signature \
		-1 >output &&
	check_patch output &&
	! grep "config sig" output &&
	! grep "my sig" output &&
	! grep "^-- \$" output
'

test_expect_success 'format-patch --signature --cover-letter' '
	git config --unset-all format.signature &&
	git format-patch --stdout --signature="my sig" --cover-letter \
		-1 >output &&
	grep "my sig" output >sig &&
	test_line_count = 2 sig
'

test_expect_success 'format.signature="" suppresses signatures' '
	git config format.signature "" &&
	git format-patch --stdout -1 >output &&
	check_patch output &&
	! grep "^-- \$" output
'

test_expect_success 'format-patch --no-signature suppresses signatures' '
	git config --unset-all format.signature &&
	git format-patch --stdout --no-signature -1 >output &&
	check_patch output &&
	! grep "^-- \$" output
'

test_expect_success 'format-patch --signature="" suppresses signatures' '
	git format-patch --stdout --signature="" -1 >output &&
	check_patch output &&
	! grep "^-- \$" output
'

test_expect_success 'prepare mail-signature input' '
	cat >mail-signature <<-\EOF

	Test User <test.email@kernel.org>
	http://git.kernel.org/cgit/git/git.git

	git.kernel.org/?p=git/git.git;a=summary

	EOF
'

test_expect_success '--signature-file=file works' '
	git format-patch --stdout --signature-file=mail-signature -1 >output &&
	check_patch output &&
	sed -e "1,/^-- \$/d" output >actual &&
	{
		cat mail-signature && echo
	} >expect &&
	test_cmp expect actual
'

test_expect_success 'format.signaturefile works' '
	test_config format.signaturefile mail-signature &&
	git format-patch --stdout -1 >output &&
	check_patch output &&
	sed -e "1,/^-- \$/d" output >actual &&
	{
		cat mail-signature && echo
	} >expect &&
	test_cmp expect actual
'

test_expect_success '--no-signature suppresses format.signaturefile ' '
	test_config format.signaturefile mail-signature &&
	git format-patch --stdout --no-signature -1 >output &&
	check_patch output &&
	! grep "^-- \$" output
'

test_expect_success '--signature-file overrides format.signaturefile' '
	cat >other-mail-signature <<-\EOF &&
	Use this other signature instead of mail-signature.
	EOF
	test_config format.signaturefile mail-signature &&
	git format-patch --stdout \
			--signature-file=other-mail-signature -1 >output &&
	check_patch output &&
	sed -e "1,/^-- \$/d" output >actual &&
	{
		cat other-mail-signature && echo
	} >expect &&
	test_cmp expect actual
'

test_expect_success '--signature overrides format.signaturefile' '
	test_config format.signaturefile mail-signature &&
	git format-patch --stdout --signature="my sig" -1 >output &&
	check_patch output &&
	grep "my sig" output
'

test_expect_success TTY 'format-patch --stdout paginates' '
	rm -f pager_used &&
	test_terminal env GIT_PAGER="wc >pager_used" git format-patch --stdout --all &&
	test_path_is_file pager_used
'

 test_expect_success TTY 'format-patch --stdout pagination can be disabled' '
	rm -f pager_used &&
	test_terminal env GIT_PAGER="wc >pager_used" git --no-pager format-patch --stdout --all &&
	test_terminal env GIT_PAGER="wc >pager_used" git -c "pager.format-patch=false" format-patch --stdout --all &&
	test_path_is_missing pager_used &&
	test_path_is_missing .git/pager_used
'

test_expect_success 'format-patch handles multi-line subjects' '
	rm -rf patches/ &&
	echo content >>file &&
	for i in one two three; do echo $i; done >msg &&
	git add file &&
	git commit -F msg &&
	git format-patch -o patches -1 &&
	grep ^Subject: patches/0001-one.patch >actual &&
	echo "Subject: [PATCH] one two three" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch handles multi-line encoded subjects' '
	rm -rf patches/ &&
	echo content >>file &&
	for i in en två tre; do echo $i; done >msg &&
	git add file &&
	git commit -F msg &&
	git format-patch -o patches -1 &&
	grep ^Subject: patches/0001-en.patch >actual &&
	echo "Subject: [PATCH] =?UTF-8?q?en=20tv=C3=A5=20tre?=" >expect &&
	test_cmp expect actual
'

M8="foo bar "
M64=$M8$M8$M8$M8$M8$M8$M8$M8
M512=$M64$M64$M64$M64$M64$M64$M64$M64
cat >expect <<'EOF'
Subject: [PATCH] foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
 bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
 foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
 bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
 foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
 bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
 foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
EOF
test_expect_success 'format-patch wraps extremely long subject (ascii)' '
	echo content >>file &&
	git add file &&
	git commit -m "$M512" &&
	git format-patch --stdout -1 >patch &&
	sed -n "/^Subject/p; /^ /p; /^$/q" patch >subject &&
	test_cmp expect subject
'

M8="föö bar "
M64=$M8$M8$M8$M8$M8$M8$M8$M8
M512=$M64$M64$M64$M64$M64$M64$M64$M64
cat >expect <<'EOF'
Subject: [PATCH] =?UTF-8?q?f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f?=
 =?UTF-8?q?=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar?=
 =?UTF-8?q?=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20?=
 =?UTF-8?q?bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6?=
 =?UTF-8?q?=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6?=
 =?UTF-8?q?=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f?=
 =?UTF-8?q?=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar?=
 =?UTF-8?q?=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20?=
 =?UTF-8?q?bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6?=
 =?UTF-8?q?=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6?=
 =?UTF-8?q?=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f?=
 =?UTF-8?q?=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar?=
 =?UTF-8?q?=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20?=
 =?UTF-8?q?bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6?=
 =?UTF-8?q?=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6?=
 =?UTF-8?q?=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f?=
 =?UTF-8?q?=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar?=
 =?UTF-8?q?=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20?=
 =?UTF-8?q?bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6?=
 =?UTF-8?q?=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6?=
 =?UTF-8?q?=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f?=
 =?UTF-8?q?=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar?=
 =?UTF-8?q?=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20bar=20f=C3=B6=C3=B6=20?=
 =?UTF-8?q?bar?=
EOF
test_expect_success 'format-patch wraps extremely long subject (rfc2047)' '
	rm -rf patches/ &&
	echo content >>file &&
	git add file &&
	git commit -m "$M512" &&
	git format-patch --stdout -1 >patch &&
	sed -n "/^Subject/p; /^ /p; /^$/q" patch >subject &&
	test_cmp expect subject
'

check_author() {
	echo content >>file &&
	git add file &&
	GIT_AUTHOR_NAME=$1 git commit -m author-check &&
	git format-patch --stdout -1 >patch &&
	sed -n "/^From: /p; /^ /p; /^$/q" patch >actual &&
	test_cmp expect actual
}

cat >expect <<'EOF'
From: "Foo B. Bar" <author@example.com>
EOF
test_expect_success 'format-patch quotes dot in from-headers' '
	check_author "Foo B. Bar"
'

cat >expect <<'EOF'
From: "Foo \"The Baz\" Bar" <author@example.com>
EOF
test_expect_success 'format-patch quotes double-quote in from-headers' '
	check_author "Foo \"The Baz\" Bar"
'

cat >expect <<'EOF'
From: =?UTF-8?q?F=C3=B6o=20Bar?= <author@example.com>
EOF
test_expect_success 'format-patch uses rfc2047-encoded from-headers when necessary' '
	check_author "Föo Bar"
'

cat >expect <<'EOF'
From: =?UTF-8?q?F=C3=B6o=20B=2E=20Bar?= <author@example.com>
EOF
test_expect_success 'rfc2047-encoded from-headers leave no rfc822 specials' '
	check_author "Föo B. Bar"
'

cat >expect <<EOF
From: foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_
 <author@example.com>
EOF
test_expect_success 'format-patch wraps moderately long from-header (ascii)' '
	check_author "foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_foo_bar_"
'

cat >expect <<'EOF'
From: Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar
 Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo
 Bar Foo Bar Foo Bar Foo Bar <author@example.com>
EOF
test_expect_success 'format-patch wraps extremely long from-header (ascii)' '
	check_author "Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar"
'

cat >expect <<'EOF'
From: "Foo.Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar
 Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo
 Bar Foo Bar Foo Bar Foo Bar" <author@example.com>
EOF
test_expect_success 'format-patch wraps extremely long from-header (rfc822)' '
	check_author "Foo.Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar"
'

cat >expect <<'EOF'
From: =?UTF-8?q?Fo=C3=B6=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo?=
 =?UTF-8?q?=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20?=
 =?UTF-8?q?Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar?=
 =?UTF-8?q?=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20Foo=20Bar=20?=
 =?UTF-8?q?Foo=20Bar=20Foo=20Bar?= <author@example.com>
EOF
test_expect_success 'format-patch wraps extremely long from-header (rfc2047)' '
	check_author "Foö Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar"
'

cat >expect <<'EOF'
From: Foö Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar
 Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo
 Bar Foo Bar Foo Bar Foo Bar <author@example.com>
EOF
test_expect_success 'format-patch wraps extremely long from-header (non-ASCII without Q-encoding)' '
	echo content >>file &&
	git add file &&
	GIT_AUTHOR_NAME="Foö Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar Foo Bar" \
	git commit -m author-check &&
	git format-patch --no-encode-email-headers --stdout -1 >patch &&
	sed -n "/^From: /p; /^ /p; /^$/q" patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: [PATCH] Foö
EOF
test_expect_success 'subject lines are unencoded with --no-encode-email-headers' '
	echo content >>file &&
	git add file &&
	git commit -m "Foö" &&
	git format-patch --no-encode-email-headers -1 --stdout >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: [PATCH] Foö
EOF
test_expect_success 'subject lines are unencoded with format.encodeEmailHeaders=false' '
	echo content >>file &&
	git add file &&
	git commit -m "Foö" &&
	git config format.encodeEmailHeaders false &&
	git format-patch -1 --stdout >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: [PATCH] =?UTF-8?q?Fo=C3=B6?=
EOF
test_expect_success '--encode-email-headers overrides format.encodeEmailHeaders' '
	echo content >>file &&
	git add file &&
	git commit -m "Foö" &&
	git config format.encodeEmailHeaders false &&
	git format-patch --encode-email-headers -1 --stdout >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: header with . in it
EOF
test_expect_success 'subject lines do not have 822 atom-quoting' '
	echo content >>file &&
	git add file &&
	git commit -m "header with . in it" &&
	git format-patch -k -1 --stdout >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: [PREFIX 1/1] header with . in it
EOF
test_expect_success 'subject prefixes have space prepended' '
	git format-patch -n -1 --stdout --subject-prefix=PREFIX >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

cat >expect <<'EOF'
Subject: [1/1] header with . in it
EOF
test_expect_success 'empty subject prefix does not have extra space' '
	git format-patch -n -1 --stdout --subject-prefix= >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

test_expect_success '--rfc' '
	cat >expect <<-\EOF &&
	Subject: [RFC PATCH 1/1] header with . in it
	EOF
	git format-patch -n -1 --stdout --rfc >patch &&
	grep ^Subject: patch >actual &&
	test_cmp expect actual
'

test_expect_success '--from=ident notices bogus ident' '
	test_must_fail git format-patch -1 --stdout --from=foo >patch
'

test_expect_success '--from=ident replaces author' '
	git format-patch -1 --stdout --from="Me <me@example.com>" >patch &&
	cat >expect <<-\EOF &&
	From: Me <me@example.com>

	From: A U Thor <author@example.com>

	EOF
	sed -ne "/^From:/p; /^$/p; /^---$/q" patch >patch.head &&
	test_cmp expect patch.head
'

test_expect_success '--from uses committer ident' '
	git format-patch -1 --stdout --from >patch &&
	cat >expect <<-\EOF &&
	From: C O Mitter <committer@example.com>

	From: A U Thor <author@example.com>

	EOF
	sed -ne "/^From:/p; /^$/p; /^---$/q" patch >patch.head &&
	test_cmp expect patch.head
'

test_expect_success '--from omits redundant in-body header' '
	git format-patch -1 --stdout --from="A U Thor <author@example.com>" >patch &&
	cat >expect <<-\EOF &&
	From: A U Thor <author@example.com>

	EOF
	sed -ne "/^From:/p; /^$/p; /^---$/q" patch >patch.head &&
	test_cmp expect patch.head
'

test_expect_success 'in-body headers trigger content encoding' '
	test_env GIT_AUTHOR_NAME="éxötìc" test_commit exotic &&
	test_when_finished "git reset --hard HEAD^" &&
	git format-patch -1 --stdout --from >patch &&
	cat >expect <<-\EOF &&
	From: C O Mitter <committer@example.com>
	Content-Type: text/plain; charset=UTF-8

	From: éxötìc <author@example.com>

	EOF
	sed -ne "/^From:/p; /^$/p; /^Content-Type/p; /^---$/q" patch >patch.head &&
	test_cmp expect patch.head
'

append_signoff()
{
	C=$(git commit-tree HEAD^^{tree} -p HEAD) &&
	git format-patch --stdout --signoff $C^..$C >append_signoff.patch &&
	sed -n -e "1,/^---$/p" append_signoff.patch |
		egrep -n "^Subject|Sign|^$"
}

test_expect_success 'signoff: commit with no body' '
	append_signoff </dev/null >actual &&
	cat <<-\EOF | sed "s/EOL$//" >expect &&
	4:Subject: [PATCH] EOL
	8:
	9:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: commit with only subject' '
	echo subject | append_signoff >actual &&
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	9:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: commit with only subject that does not end with NL' '
	printf subject | append_signoff >actual &&
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	9:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: no existing signoffs' '
	append_signoff <<-\EOF >actual &&
	subject

	body
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: no existing signoffs and no trailing NL' '
	printf "subject\n\nbody" | append_signoff >actual &&
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: some random signoff' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Signed-off-by: my@house
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: my@house
	12:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: misc conforming footer elements' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Signed-off-by: my@house
	(cherry picked from commit da39a3ee5e6b4b0d3255bfef95601890afd80709)
	Tested-by: Some One <someone@example.com>
	Bug: 1234
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: my@house
	15:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: some random signoff-alike' '
	append_signoff <<-\EOF >actual &&
	subject

	body
	Fooled-by-me: my@house
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	11:
	12:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: not really a signoff' '
	append_signoff <<-\EOF >actual &&
	subject

	I want to mention about Signed-off-by: here.
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	9:I want to mention about Signed-off-by: here.
	10:
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: not really a signoff (2)' '
	append_signoff <<-\EOF >actual &&
	subject

	My unfortunate
	Signed-off-by: example happens to be wrapped here.
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:Signed-off-by: example happens to be wrapped here.
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: valid S-o-b paragraph in the middle' '
	append_signoff <<-\EOF >actual &&
	subject

	Signed-off-by: my@house
	Signed-off-by: your@house

	A lot of houses.
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	9:Signed-off-by: my@house
	10:Signed-off-by: your@house
	11:
	13:
	14:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: the same signoff at the end' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Signed-off-by: C O Mitter <committer@example.com>
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: the same signoff at the end, no trailing NL' '
	printf "subject\n\nSigned-off-by: C O Mitter <committer@example.com>" |
		append_signoff >actual &&
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	9:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: the same signoff NOT at the end' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Signed-off-by: C O Mitter <committer@example.com>
	Signed-off-by: my@house
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	11:Signed-off-by: C O Mitter <committer@example.com>
	12:Signed-off-by: my@house
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: tolerate garbage in conforming footer' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Tested-by: my@house
	Some Trash
	Signed-off-by: C O Mitter <committer@example.com>
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	13:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: respect trailer config' '
	append_signoff <<-\EOF >actual &&
	subject

	Myfooter: x
	Some Trash
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	11:
	12:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual &&

	test_config trailer.Myfooter.ifexists add &&
	append_signoff <<-\EOF >actual &&
	subject

	Myfooter: x
	Some Trash
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	11:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'signoff: footer begins with non-signoff without @ sign' '
	append_signoff <<-\EOF >actual &&
	subject

	body

	Reviewed-id: Noone
	Tested-by: my@house
	Change-id: Ideadbeef
	Signed-off-by: C O Mitter <committer@example.com>
	Bug: 1234
	EOF
	cat >expect <<-\EOF &&
	4:Subject: [PATCH] subject
	8:
	10:
	14:Signed-off-by: C O Mitter <committer@example.com>
	EOF
	test_cmp expect actual
'

test_expect_success 'format patch ignores color.ui' '
	test_unconfig color.ui &&
	git format-patch --stdout -1 >expect &&
	test_config color.ui always &&
	git format-patch --stdout -1 >actual &&
	test_cmp expect actual
'

test_expect_success 'format patch respects diff.relative' '
	rm -rf subdir &&
	mkdir subdir &&
	echo other content >subdir/file2 &&
	git add subdir/file2 &&
	git commit -F msg &&
	test_unconfig diff.relative &&
	git format-patch --relative=subdir --stdout -1 >expect &&
	test_config diff.relative true &&
	git -C subdir format-patch --stdout -1 >actual &&
	test_cmp expect actual
'

test_expect_success 'cover letter with invalid --cover-from-description and config' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_must_fail git format-patch --cover-letter --cover-from-description garbage main &&
	test_config format.coverFromDescription garbage &&
	test_must_fail git format-patch --cover-letter main
'

test_expect_success 'cover letter with format.coverFromDescription = default' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription default &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description default' '
	test_config branch.rebuild-1.description "config subject

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description default main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with format.coverFromDescription = none' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription none &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	! grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description none' '
	test_config branch.rebuild-1.description "config subject

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description none main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	! grep "^body$" actual
'

test_expect_success 'cover letter with format.coverFromDescription = message' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription message &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description message' '
	test_config branch.rebuild-1.description "config subject

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description message main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with format.coverFromDescription = subject' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription subject &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] config subject$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description subject' '
	test_config branch.rebuild-1.description "config subject

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description subject main >actual &&
	grep "^Subject: \[PATCH 0/2\] config subject$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with format.coverFromDescription = auto (short subject line)' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription auto &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] config subject$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description auto (short subject line)' '
	test_config branch.rebuild-1.description "config subject

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description auto main >actual &&
	grep "^Subject: \[PATCH 0/2\] config subject$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with format.coverFromDescription = auto (long subject line)' '
	test_config branch.rebuild-1.description "this is a really long first line and it is over 100 characters long which is the threshold for long subjects

body" &&
	test_config format.coverFromDescription auto &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^this is a really long first line and it is over 100 characters long which is the threshold for long subjects$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with --cover-from-description auto (long subject line)' '
	test_config branch.rebuild-1.description "this is a really long first line and it is over 100 characters long which is the threshold for long subjects

body" &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description auto main >actual &&
	grep "^Subject: \[PATCH 0/2\] \*\*\* SUBJECT HERE \*\*\*$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	grep "^this is a really long first line and it is over 100 characters long which is the threshold for long subjects$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter with command-line --cover-from-description overrides config' '
	test_config branch.rebuild-1.description "config subject

body" &&
	test_config format.coverFromDescription none &&
	git checkout rebuild-1 &&
	git format-patch --stdout --cover-letter --cover-from-description subject main >actual &&
	grep "^Subject: \[PATCH 0/2\] config subject$" actual &&
	! grep "^\*\*\* BLURB HERE \*\*\*$" actual &&
	! grep "^config subject$" actual &&
	grep "^body$" actual
'

test_expect_success 'cover letter using branch description (1)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter main >actual &&
	grep hello actual
'

test_expect_success 'cover letter using branch description (2)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter rebuild-1~2..rebuild-1 >actual &&
	grep hello actual
'

test_expect_success 'cover letter using branch description (3)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter ^main rebuild-1 >actual &&
	grep hello actual
'

test_expect_success 'cover letter using branch description (4)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter main.. >actual &&
	grep hello actual
'

test_expect_success 'cover letter using branch description (5)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter -2 HEAD >actual &&
	grep hello actual
'

test_expect_success 'cover letter using branch description (6)' '
	git checkout rebuild-1 &&
	test_config branch.rebuild-1.description hello &&
	git format-patch --stdout --cover-letter -2 >actual &&
	grep hello actual
'

test_expect_success 'cover letter with nothing' '
	git format-patch --stdout --cover-letter >actual &&
	test_line_count = 0 actual
'

test_expect_success 'cover letter auto' '
	mkdir -p tmp &&
	test_when_finished "rm -rf tmp;
		git config --unset format.coverletter" &&

	git config format.coverletter auto &&
	git format-patch -o tmp -1 >list &&
	test_line_count = 1 list &&
	git format-patch -o tmp -2 >list &&
	test_line_count = 3 list
'

test_expect_success 'cover letter auto user override' '
	mkdir -p tmp &&
	test_when_finished "rm -rf tmp;
		git config --unset format.coverletter" &&

	git config format.coverletter auto &&
	git format-patch -o tmp --cover-letter -1 >list &&
	test_line_count = 2 list &&
	git format-patch -o tmp --cover-letter -2 >list &&
	test_line_count = 3 list &&
	git format-patch -o tmp --no-cover-letter -1 >list &&
	test_line_count = 1 list &&
	git format-patch -o tmp --no-cover-letter -2 >list &&
	test_line_count = 2 list
'

test_expect_success 'format-patch --zero-commit' '
	git format-patch --zero-commit --stdout v2..v1 >patch2 &&
	grep "^From " patch2 | sort | uniq >actual &&
	echo "From $ZERO_OID Mon Sep 17 00:00:00 2001" >expect &&
	test_cmp expect actual
'

test_expect_success 'From line has expected format' '
	git format-patch --stdout v2..v1 >patch2 &&
	grep "^From " patch2 >from &&
	grep "^From $OID_REGEX Mon Sep 17 00:00:00 2001$" patch2 >filtered &&
	test_cmp from filtered
'

test_expect_success 'format-patch -o with no leading directories' '
	rm -fr patches &&
	git format-patch -o patches main..side &&
	count=$(git rev-list --count main..side) &&
	ls patches >list &&
	test_line_count = $count list
'

test_expect_success 'format-patch -o with leading existing directories' '
	rm -rf existing-dir &&
	mkdir existing-dir &&
	git format-patch -o existing-dir/patches main..side &&
	count=$(git rev-list --count main..side) &&
	ls existing-dir/patches >list &&
	test_line_count = $count list
'

test_expect_success 'format-patch -o with leading non-existing directories' '
	rm -rf non-existing-dir &&
	git format-patch -o non-existing-dir/patches main..side &&
	count=$(git rev-list --count main..side) &&
	test_path_is_dir non-existing-dir &&
	ls non-existing-dir/patches >list &&
	test_line_count = $count list
'

test_expect_success 'format-patch format.outputDirectory option' '
	test_config format.outputDirectory patches &&
	rm -fr patches &&
	git format-patch main..side &&
	count=$(git rev-list --count main..side) &&
	ls patches >list &&
	test_line_count = $count list
'

test_expect_success 'format-patch -o overrides format.outputDirectory' '
	test_config format.outputDirectory patches &&
	rm -fr patches patchset &&
	git format-patch main..side -o patchset &&
	test_path_is_missing patches &&
	test_path_is_dir patchset
'

test_expect_success 'format-patch forbids multiple outputs' '
	rm -fr outfile outdir &&
	test_must_fail \
		git format-patch --stdout --output-directory=outdir &&
	test_must_fail \
		git format-patch --stdout --output=outfile &&
	test_must_fail \
		git format-patch --output=outfile --output-directory=outdir
'

test_expect_success 'configured outdir does not conflict with output options' '
	rm -fr outfile outdir &&
	test_config format.outputDirectory outdir &&
	git format-patch --stdout &&
	test_path_is_missing outdir &&
	git format-patch --output=outfile &&
	test_path_is_missing outdir
'

test_expect_success 'format-patch --output' '
	rm -fr outfile &&
	git format-patch -3 --stdout HEAD >expect &&
	git format-patch -3 --output=outfile HEAD &&
	test_cmp expect outfile
'

test_expect_success 'format-patch --cover-letter --output' '
	rm -fr outfile &&
	git format-patch --cover-letter -3 --stdout HEAD >expect &&
	git format-patch --cover-letter -3 --output=outfile HEAD &&
	test_cmp expect outfile
'

test_expect_success 'format-patch --base' '
	git checkout patchid &&

	git format-patch --stdout --base=HEAD~3 -1 >patch &&
	tail -n 7 patch >actual1 &&

	git format-patch --stdout --base=HEAD~3 HEAD~.. >patch &&
	tail -n 7 patch >actual2 &&

	echo >expect &&
	git rev-parse HEAD~3 >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >>expect &&

	git show --patch HEAD~2 >patch &&
	git patch-id --stable <patch >patch.id.raw &&
	awk "{print \"prerequisite-patch-id:\", \$1}" <patch.id.raw >>expect &&

	git show --patch HEAD~1 >patch &&
	git patch-id --stable <patch >patch.id.raw &&
	awk "{print \"prerequisite-patch-id:\", \$1}" <patch.id.raw >>expect &&

	signature >>expect &&
	test_cmp expect actual1 &&
	test_cmp expect actual2 &&

	echo >fail &&
	echo "base-commit: $(cat commit-id-base)" >>fail &&

	git show --patch HEAD~2 >patch &&
	git patch-id --unstable <patch >patch.id.raw &&
	awk "{print \"prerequisite-patch-id:\", \$1}" <patch.id.raw >>fail &&

	git show --patch HEAD~1 >patch &&
	git patch-id --unstable <patch >patch.id.raw &&
	awk "{print \"prerequisite-patch-id:\", \$1}" <patch.id.raw >>fail &&

	signature >>fail &&
	! test_cmp fail actual1 &&
	! test_cmp fail actual2
'

test_expect_success 'format-patch --base errors out when base commit is in revision list' '
	test_must_fail git format-patch --base=HEAD -2 &&
	test_must_fail git format-patch --base=HEAD~1 -2 &&
	git format-patch --stdout --base=HEAD~2 -2 >patch &&
	grep "^base-commit:" patch >actual &&
	git rev-parse HEAD~2 >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch --base errors out when base commit is not ancestor of revision list' '
	# For history as below:
	#
	#    ---Q---P---Z---Y---*---X
	#	 \             /
	#	  ------------W
	#
	# If "format-patch Z..X" is given, P and Z can not be specified as the base commit
	git checkout -b topic1 main &&
	git rev-parse HEAD >commit-id-base &&
	test_commit P &&
	git rev-parse HEAD >commit-id-P &&
	test_commit Z &&
	git rev-parse HEAD >commit-id-Z &&
	test_commit Y &&
	git checkout -b topic2 main &&
	test_commit W &&
	git merge topic1 &&
	test_commit X &&
	test_must_fail git format-patch --base=$(cat commit-id-P) -3 &&
	test_must_fail git format-patch --base=$(cat commit-id-Z) -3 &&
	git format-patch --stdout --base=$(cat commit-id-base) -3 >patch &&
	grep "^base-commit:" patch >actual &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch --base=auto' '
	git checkout -b upstream main &&
	git checkout -b local upstream &&
	git branch --set-upstream-to=upstream &&
	test_commit N1 &&
	test_commit N2 &&
	git format-patch --stdout --base=auto -2 >patch &&
	grep "^base-commit:" patch >actual &&
	git rev-parse upstream >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch errors out when history involves criss-cross' '
	# setup criss-cross history
	#
	#   B---M1---D
	#  / \ /
	# A   X
	#  \ / \
	#   C---M2---E
	#
	git checkout main &&
	test_commit A &&
	git checkout -b xb main &&
	test_commit B &&
	git checkout -b xc main &&
	test_commit C &&
	git checkout -b xbc xb -- &&
	git merge xc &&
	git checkout -b xcb xc -- &&
	git branch --set-upstream-to=xbc &&
	git merge xb &&
	git checkout xbc &&
	test_commit D &&
	git checkout xcb &&
	test_commit E &&
	test_must_fail 	git format-patch --base=auto -1
'

test_expect_success 'format-patch format.useAutoBase whenAble history involves criss-cross' '
	test_config format.useAutoBase whenAble &&
	git format-patch -1 >patch &&
	! grep "^base-commit:" patch
'

test_expect_success 'format-patch format.useAutoBase option' '
	git checkout local &&
	test_config format.useAutoBase true &&
	git format-patch --stdout -1 >patch &&
	grep "^base-commit:" patch >actual &&
	git rev-parse upstream >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch format.useAutoBase option with whenAble' '
	git checkout local &&
	test_config format.useAutoBase whenAble &&
	git format-patch --stdout -1 >patch &&
	grep "^base-commit:" patch >actual &&
	git rev-parse upstream >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch --base overrides format.useAutoBase' '
	test_config format.useAutoBase true &&
	git format-patch --stdout --base=HEAD~1 -1 >patch &&
	grep "^base-commit:" patch >actual &&
	git rev-parse HEAD~1 >commit-id-base &&
	echo "base-commit: $(cat commit-id-base)" >expect &&
	test_cmp expect actual
'

test_expect_success 'format-patch --no-base overrides format.useAutoBase' '
	test_config format.useAutoBase true &&
	git format-patch --stdout --no-base -1 >patch &&
	! grep "^base-commit:" patch
'

test_expect_success 'format-patch --no-base overrides format.useAutoBase whenAble' '
	test_config format.useAutoBase whenAble &&
	git format-patch --stdout --no-base -1 >patch &&
	! grep "^base-commit:" patch
'

test_expect_success 'format-patch --base with --attach' '
	git format-patch --attach=mimemime --stdout --base=HEAD~ -1 >patch &&
	sed -n -e "/^base-commit:/s/.*/1/p" -e "/^---*mimemime--$/s/.*/2/p" \
		patch >actual &&
	test_write_lines 1 2 >expect &&
	test_cmp expect actual
'
test_expect_success 'format-patch --attach cover-letter only is non-multipart' '
	test_when_finished "rm -fr patches" &&
	git format-patch -o patches --cover-letter --attach=mimemime --base=HEAD~ -1 &&
	! egrep "^--+mimemime" patches/0000*.patch &&
	egrep "^--+mimemime$" patches/0001*.patch >output &&
	test_line_count = 2 output &&
	egrep "^--+mimemime--$" patches/0001*.patch >output &&
	test_line_count = 1 output
'

test_expect_success 'format-patch --pretty=mboxrd' '
	sp=" " &&
	cat >msg <<-INPUT_END &&
	mboxrd should escape the body

	From could trip up a loose mbox parser
	>From extra escape for reversibility
	>>From extra escape for reversibility 2
	from lower case not escaped
	Fromm bad speling not escaped
	 From with leading space not escaped

	F
	From
	From$sp
	From    $sp
	From	$sp
	INPUT_END

	cat >expect <<-INPUT_END &&
	>From could trip up a loose mbox parser
	>>From extra escape for reversibility
	>>>From extra escape for reversibility 2
	from lower case not escaped
	Fromm bad speling not escaped
	 From with leading space not escaped

	F
	From
	From
	From
	From
	INPUT_END

	C=$(git commit-tree HEAD^^{tree} -p HEAD <msg) &&
	git format-patch --pretty=mboxrd --stdout -1 $C~1..$C >patch &&
	git grep -h --no-index -A11 \
		"^>From could trip up a loose mbox parser" patch >actual &&
	test_cmp expect actual
'

test_expect_success 'interdiff: setup' '
	git checkout -b boop main &&
	test_commit fnorp blorp &&
	test_commit fleep blorp
'

test_expect_success 'interdiff: cover-letter' '
	sed "y/q/ /" >expect <<-\EOF &&
	+fleep
	--q
	EOF
	git format-patch --cover-letter --interdiff=boop~2 -1 boop &&
	test_i18ngrep "^Interdiff:$" 0000-cover-letter.patch &&
	test_i18ngrep ! "^Interdiff:$" 0001-fleep.patch &&
	sed "1,/^@@ /d; /^-- $/q" 0000-cover-letter.patch >actual &&
	test_cmp expect actual
'

test_expect_success 'interdiff: reroll-count' '
	git format-patch --cover-letter --interdiff=boop~2 -v2 -1 boop &&
	test_i18ngrep "^Interdiff ..* v1:$" v2-0000-cover-letter.patch
'

test_expect_success 'interdiff: solo-patch' '
	cat >expect <<-\EOF &&
	  +fleep

	EOF
	git format-patch --interdiff=boop~2 -1 boop &&
	test_i18ngrep "^Interdiff:$" 0001-fleep.patch &&
	sed "1,/^  @@ /d; /^$/q" 0001-fleep.patch >actual &&
	test_cmp expect actual
'

test_done