merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 791 insertions, 0 deletions

diff --git a/third_party/git/t/t4205-log-pretty-formats.sh b/third_party/git/t/t4205-log-pretty-formats.sh
new file mode 100755
index 000000000000..f42a69faa2fd
--- /dev/null
+++ b/third_party/git/t/t4205-log-pretty-formats.sh
@@ -0,0 +1,791 @@
+#!/bin/sh
+#
+# Copyright (c) 2010, Will Palmer
+# Copyright (c) 2011, Alexey Shumkin (+ non-UTF-8 commit encoding tests)
+#
+
+test_description='Test pretty formats'
+. ./test-lib.sh
+
+# Tested non-UTF-8 encoding
+test_encoding="ISO8859-1"
+
+sample_utf8_part=$(printf "f\303\244ng")
+
+commit_msg () {
+	# String "initial. initial" partly in German
+	# (translated with Google Translate),
+	# encoded in UTF-8, used as a commit log message below.
+	msg="initial. an${sample_utf8_part}lich\n"
+	if test -n "$1"
+	then
+		printf "$msg" | iconv -f utf-8 -t "$1"
+	else
+		printf "$msg"
+	fi
+}
+
+test_expect_success 'set up basic repos' '
+	>foo &&
+	>bar &&
+	git add foo &&
+	test_tick &&
+	git config i18n.commitEncoding $test_encoding &&
+	commit_msg $test_encoding | git commit -F - &&
+	git add bar &&
+	test_tick &&
+	git commit -m "add bar" &&
+	git config --unset i18n.commitEncoding
+'
+
+test_expect_success 'alias builtin format' '
+	git log --pretty=oneline >expected &&
+	git config pretty.test-alias oneline &&
+	git log --pretty=test-alias >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'alias masking builtin format' '
+	git log --pretty=oneline >expected &&
+	git config pretty.oneline "%H" &&
+	git log --pretty=oneline >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'alias user-defined format' '
+	git log --pretty="format:%h" >expected &&
+	git config pretty.test-alias "format:%h" &&
+	git log --pretty=test-alias >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'alias user-defined tformat with %s (ISO8859-1 encoding)' '
+	git config i18n.logOutputEncoding $test_encoding &&
+	git log --oneline >expected-s &&
+	git log --pretty="tformat:%h %s" >actual-s &&
+	git config --unset i18n.logOutputEncoding &&
+	test_cmp expected-s actual-s
+'
+
+test_expect_success 'alias user-defined tformat with %s (utf-8 encoding)' '
+	git log --oneline >expected-s &&
+	git log --pretty="tformat:%h %s" >actual-s &&
+	test_cmp expected-s actual-s
+'
+
+test_expect_success 'alias user-defined tformat' '
+	git log --pretty="tformat:%h" >expected &&
+	git config pretty.test-alias "tformat:%h" &&
+	git log --pretty=test-alias >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'alias non-existent format' '
+	git config pretty.test-alias format-that-will-never-exist &&
+	test_must_fail git log --pretty=test-alias
+'
+
+test_expect_success 'alias of an alias' '
+	git log --pretty="tformat:%h" >expected &&
+	git config pretty.test-foo "tformat:%h" &&
+	git config pretty.test-bar test-foo &&
+	git log --pretty=test-bar >actual && test_cmp expected actual
+'
+
+test_expect_success 'alias masking an alias' '
+	git log --pretty=format:"Two %H" >expected &&
+	git config pretty.duplicate "format:One %H" &&
+	git config --add pretty.duplicate "format:Two %H" &&
+	git log --pretty=duplicate >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'alias loop' '
+	git config pretty.test-foo test-bar &&
+	git config pretty.test-bar test-foo &&
+	test_must_fail git log --pretty=test-foo
+'
+
+test_expect_success 'NUL separation' '
+	printf "add bar\0$(commit_msg)" >expected &&
+	git log -z --pretty="format:%s" >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'NUL termination' '
+	printf "add bar\0$(commit_msg)\0" >expected &&
+	git log -z --pretty="tformat:%s" >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'NUL separation with --stat' '
+	stat0_part=$(git diff --stat HEAD^ HEAD) &&
+	stat1_part=$(git diff-tree --no-commit-id --stat --root HEAD^) &&
+	printf "add bar\n$stat0_part\n\0$(commit_msg)\n$stat1_part\n" >expected &&
+	git log -z --stat --pretty="format:%s" >actual &&
+	test_i18ncmp expected actual
+'
+
+test_expect_failure C_LOCALE_OUTPUT 'NUL termination with --stat' '
+	stat0_part=$(git diff --stat HEAD^ HEAD) &&
+	stat1_part=$(git diff-tree --no-commit-id --stat --root HEAD^) &&
+	printf "add bar\n$stat0_part\n\0$(commit_msg)\n$stat1_part\n0" >expected &&
+	git log -z --stat --pretty="tformat:%s" >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'setup more commits' '
+	test_commit "message one" one one message-one &&
+	test_commit "message two" two two message-two &&
+	head1=$(git rev-parse --verify --short HEAD~0) &&
+	head2=$(git rev-parse --verify --short HEAD~1) &&
+	head3=$(git rev-parse --verify --short HEAD~2) &&
+	head4=$(git rev-parse --verify --short HEAD~3)
+'
+
+test_expect_success 'left alignment formatting' '
+	git log --pretty="tformat:%<(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	message two                            Z
+	message one                            Z
+	add bar                                Z
+	$(commit_msg)                    Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	message two                            Z
+	message one                            Z
+	add bar                                Z
+	$(commit_msg)                    Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting at the nth column' '
+	git log --pretty="tformat:%h %<|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1 message two                    Z
+	$head2 message one                    Z
+	$head3 add bar                        Z
+	$head4 $(commit_msg)            Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting at the nth column' '
+	COLUMNS=50 git log --pretty="tformat:%h %<|(-10)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1 message two                    Z
+	$head2 message one                    Z
+	$head3 add bar                        Z
+	$head4 $(commit_msg)            Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting at the nth column. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %<|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	$head1 message two                    Z
+	$head2 message one                    Z
+	$head3 add bar                        Z
+	$head4 $(commit_msg)            Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with no padding' '
+	git log --pretty="tformat:%<(1)%s" >actual &&
+	cat <<-EOF >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with no padding. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(1)%s" >actual &&
+	cat <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with trunc' '
+	git log --pretty="tformat:%<(10,trunc)%s" >actual &&
+	qz_to_tab_space <<-\EOF >expected &&
+	message ..
+	message ..
+	add bar  Z
+	initial...
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with trunc. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,trunc)%s" >actual &&
+	qz_to_tab_space <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	message ..
+	message ..
+	add bar  Z
+	initial...
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with ltrunc' '
+	git log --pretty="tformat:%<(10,ltrunc)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	..sage two
+	..sage one
+	add bar  Z
+	..${sample_utf8_part}lich
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with ltrunc. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,ltrunc)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	..sage two
+	..sage one
+	add bar  Z
+	..${sample_utf8_part}lich
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with mtrunc' '
+	git log --pretty="tformat:%<(10,mtrunc)%s" >actual &&
+	qz_to_tab_space <<-\EOF >expected &&
+	mess.. two
+	mess.. one
+	add bar  Z
+	init..lich
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left alignment formatting with mtrunc. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,mtrunc)%s" >actual &&
+	qz_to_tab_space <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	mess.. two
+	mess.. one
+	add bar  Z
+	init..lich
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting' '
+	git log --pretty="tformat:%>(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	Z                            message two
+	Z                            message one
+	Z                                add bar
+	Z                    $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%>(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	Z                            message two
+	Z                            message one
+	Z                                add bar
+	Z                    $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting at the nth column' '
+	git log --pretty="tformat:%h %>|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1                      message two
+	$head2                      message one
+	$head3                          add bar
+	$head4              $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting at the nth column' '
+	COLUMNS=50 git log --pretty="tformat:%h %>|(-10)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1                      message two
+	$head2                      message one
+	$head3                          add bar
+	$head4              $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting at the nth column. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %>|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	$head1                      message two
+	$head2                      message one
+	$head3                          add bar
+	$head4              $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+# Note: Space between 'message' and 'two' should be in the same column
+# as in previous test.
+test_expect_success 'right alignment formatting at the nth column with --graph. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --graph --pretty="tformat:%h %>|(40)%s" >actual &&
+	iconv -f utf-8 -t $test_encoding >expected <<-EOF &&
+	* $head1                    message two
+	* $head2                    message one
+	* $head3                        add bar
+	* $head4            $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting with no padding' '
+	git log --pretty="tformat:%>(1)%s" >actual &&
+	cat <<-EOF >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting with no padding and with --graph' '
+	git log --graph --pretty="tformat:%>(1)%s" >actual &&
+	cat <<-EOF >expected &&
+	* message two
+	* message one
+	* add bar
+	* $(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'right alignment formatting with no padding. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%>(1)%s" >actual &&
+	cat <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'center alignment formatting' '
+	git log --pretty="tformat:%><(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	Z             message two              Z
+	Z             message one              Z
+	Z               add bar                Z
+	Z         $(commit_msg)          Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'center alignment formatting. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%><(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	Z             message two              Z
+	Z             message one              Z
+	Z               add bar                Z
+	Z         $(commit_msg)          Z
+	EOF
+	test_cmp expected actual
+'
+test_expect_success 'center alignment formatting at the nth column' '
+	git log --pretty="tformat:%h %><|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1           message two          Z
+	$head2           message one          Z
+	$head3             add bar            Z
+	$head4       $(commit_msg)      Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'center alignment formatting at the nth column' '
+	COLUMNS=70 git log --pretty="tformat:%h %><|(-30)%s" >actual &&
+	qz_to_tab_space <<-EOF >expected &&
+	$head1           message two          Z
+	$head2           message one          Z
+	$head3             add bar            Z
+	$head4       $(commit_msg)      Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'center alignment formatting at the nth column. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%h %><|(40)%s" >actual &&
+	qz_to_tab_space <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	$head1           message two          Z
+	$head2           message one          Z
+	$head3             add bar            Z
+	$head4       $(commit_msg)      Z
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'center alignment formatting with no padding' '
+	git log --pretty="tformat:%><(1)%s" >actual &&
+	cat <<-EOF >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+# save HEAD's SHA-1 digest (with no abbreviations) to use it below
+# as far as the next test amends HEAD
+old_head1=$(git rev-parse --verify HEAD~0)
+test_expect_success 'center alignment formatting with no padding. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%><(1)%s" >actual &&
+	cat <<-EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	message two
+	message one
+	add bar
+	$(commit_msg)
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'left/right alignment formatting with stealing' '
+	git commit --amend -m short --author "long long long <long@me.com>" &&
+	git log --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)% an" >actual &&
+	cat <<-\EOF >expected &&
+	short long  long long
+	message ..   A U Thor
+	add bar      A U Thor
+	initial...   A U Thor
+	EOF
+	test_cmp expected actual
+'
+test_expect_success 'left/right alignment formatting with stealing. i18n.logOutputEncoding' '
+	git -c i18n.logOutputEncoding=$test_encoding log --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)% an" >actual &&
+	cat <<-\EOF | iconv -f utf-8 -t $test_encoding >expected &&
+	short long  long long
+	message ..   A U Thor
+	add bar      A U Thor
+	initial...   A U Thor
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'strbuf_utf8_replace() not producing NUL' '
+	git log --color --pretty="tformat:%<(10,trunc)%s%>>(10,ltrunc)%C(auto)%d" |
+		test_decode_color |
+		nul_to_q >actual &&
+	! grep Q actual
+'
+
+# ISO strict date format
+test_expect_success 'ISO and ISO-strict date formats display the same values' '
+	git log --format=%ai%n%ci |
+	sed -e "s/ /T/; s/ //; s/..\$/:&/" >expected &&
+	git log --format=%aI%n%cI >actual &&
+	test_cmp expected actual
+'
+
+# get new digests (with no abbreviations)
+test_expect_success 'set up log decoration tests' '
+	head1=$(git rev-parse --verify HEAD~0) &&
+	head2=$(git rev-parse --verify HEAD~1)
+'
+
+test_expect_success 'log decoration properly follows tag chain' '
+	git tag -a tag1 -m tag1 &&
+	git tag -a tag2 -m tag2 tag1 &&
+	git tag -d tag1 &&
+	git commit --amend -m shorter &&
+	git log --no-walk --tags --pretty="%H %d" --decorate=full >actual &&
+	cat <<-EOF >expected &&
+	$head2  (tag: refs/tags/message-one)
+	$old_head1  (tag: refs/tags/message-two)
+	$head1  (tag: refs/tags/tag2)
+	EOF
+	sort -k3 actual >actual1 &&
+	test_cmp expected actual1
+'
+
+test_expect_success 'clean log decoration' '
+	git log --no-walk --tags --pretty="%H %D" --decorate=full >actual &&
+	cat >expected <<-EOF &&
+	$head2 tag: refs/tags/message-one
+	$old_head1 tag: refs/tags/message-two
+	$head1 tag: refs/tags/tag2
+	EOF
+	sort -k3 actual >actual1 &&
+	test_cmp expected actual1
+'
+
+cat >trailers <<EOF
+Signed-off-by: A U Thor <author@example.com>
+Acked-by: A U Thor <author@example.com>
+[ v2 updated patch description ]
+Signed-off-by: A U Thor
+  <author@example.com>
+EOF
+
+unfold () {
+	perl -0pe 's/\n\s+/ /g'
+}
+
+test_expect_success 'set up trailer tests' '
+	echo "Some contents" >trailerfile &&
+	git add trailerfile &&
+	git commit -F - <<-EOF
+	trailers: this commit message has trailers
+
+	This commit is a test commit with trailers at the end. We parse this
+	message and display the trailers using %(trailers).
+
+	$(cat trailers)
+	EOF
+'
+
+test_expect_success 'pretty format %(trailers) shows trailers' '
+	git log --no-walk --pretty="%(trailers)" >actual &&
+	{
+		cat trailers &&
+		echo
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:only) shows only "key: value" trailers' '
+	git log --no-walk --pretty="%(trailers:only)" >actual &&
+	{
+		grep -v patch.description <trailers &&
+		echo
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:only=yes) shows only "key: value" trailers' '
+	git log --no-walk --pretty=format:"%(trailers:only=yes)" >actual &&
+	grep -v patch.description <trailers >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:only=no) shows all trailers' '
+	git log --no-walk --pretty=format:"%(trailers:only=no)" >actual &&
+	cat trailers >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:only=no,only=true) shows only "key: value" trailers' '
+	git log --no-walk --pretty=format:"%(trailers:only=yes)" >actual &&
+	grep -v patch.description <trailers >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:unfold) unfolds trailers' '
+	git log --no-walk --pretty="%(trailers:unfold)" >actual &&
+	{
+		unfold <trailers &&
+		echo
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success ':only and :unfold work together' '
+	git log --no-walk --pretty="%(trailers:only,unfold)" >actual &&
+	git log --no-walk --pretty="%(trailers:unfold,only)" >reverse &&
+	test_cmp actual reverse &&
+	{
+		grep -v patch.description <trailers | unfold &&
+		echo
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:key=foo) shows that trailer' '
+	git log --no-walk --pretty="format:%(trailers:key=Acked-by)" >actual &&
+	echo "Acked-by: A U Thor <author@example.com>" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:key=foo) is case insensitive' '
+	git log --no-walk --pretty="format:%(trailers:key=AcKed-bY)" >actual &&
+	echo "Acked-by: A U Thor <author@example.com>" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:key=foo:) trailing colon also works' '
+	git log --no-walk --pretty="format:%(trailers:key=Acked-by:)" >actual &&
+	echo "Acked-by: A U Thor <author@example.com>" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:key=foo) multiple keys' '
+	git log --no-walk --pretty="format:%(trailers:key=Acked-by:,key=Signed-off-By)" >actual &&
+	grep -v patch.description <trailers >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:key=nonexistant) becomes empty' '
+	git log --no-walk --pretty="x%(trailers:key=Nacked-by)x" >actual &&
+	echo "xx" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:key=foo) handles multiple lines even if folded' '
+	git log --no-walk --pretty="format:%(trailers:key=Signed-Off-by)" >actual &&
+	grep -v patch.description <trailers | grep -v Acked-by >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:key=foo,unfold) properly unfolds' '
+	git log --no-walk --pretty="format:%(trailers:key=Signed-Off-by,unfold)" >actual &&
+	unfold <trailers | grep Signed-off-by >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:key=foo,only=no) also includes nontrailer lines' '
+	git log --no-walk --pretty="format:%(trailers:key=Acked-by,only=no)" >actual &&
+	{
+		echo "Acked-by: A U Thor <author@example.com>" &&
+		grep patch.description <trailers
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:key) without value is error' '
+	git log --no-walk --pretty="tformat:%(trailers:key)" >actual &&
+	echo "%(trailers:key)" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success '%(trailers:key=foo,valueonly) shows only value' '
+	git log --no-walk --pretty="format:%(trailers:key=Acked-by,valueonly)" >actual &&
+	echo "A U Thor <author@example.com>" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers:separator) changes separator' '
+	git log --no-walk --pretty=format:"X%(trailers:separator=%x00,unfold)X" >actual &&
+	printf "XSigned-off-by: A U Thor <author@example.com>\0Acked-by: A U Thor <author@example.com>\0[ v2 updated patch description ]\0Signed-off-by: A U Thor <author@example.com>X" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'pretty format %(trailers) combining separator/key/valueonly' '
+	git commit --allow-empty -F - <<-\EOF &&
+	Important fix
+
+	The fix is explained here
+
+	Closes: #1234
+	EOF
+
+	git commit --allow-empty -F - <<-\EOF &&
+	Another fix
+
+	The fix is explained here
+
+	Closes: #567
+	Closes: #890
+	EOF
+
+	git commit --allow-empty -F - <<-\EOF &&
+	Does not close any tickets
+	EOF
+
+	git log --pretty="%s% (trailers:separator=%x2c%x20,key=Closes,valueonly)" HEAD~3.. >actual &&
+	test_write_lines \
+		"Does not close any tickets" \
+		"Another fix #567, #890" \
+		"Important fix #1234" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'trailer parsing not fooled by --- line' '
+	git commit --allow-empty -F - <<-\EOF &&
+	this is the subject
+
+	This is the body. The message has a "---" line which would confuse a
+	message+patch parser. But here we know we have only a commit message,
+	so we get it right.
+
+	trailer: wrong
+	---
+	This is more body.
+
+	trailer: right
+	EOF
+
+	{
+		echo "trailer: right" &&
+		echo
+	} >expect &&
+	git log --no-walk --format="%(trailers)" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'set up %S tests' '
+	git checkout --orphan source-a &&
+	test_commit one &&
+	test_commit two &&
+	git checkout -b source-b HEAD^ &&
+	test_commit three
+'
+
+test_expect_success 'log --format=%S paints branch names' '
+	cat >expect <<-\EOF &&
+	source-b
+	source-a
+	source-b
+	EOF
+	git log --format=%S source-a source-b >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log --format=%S paints tag names' '
+	git tag -m tagged source-tag &&
+	cat >expect <<-\EOF &&
+	source-tag
+	source-a
+	source-tag
+	EOF
+	git log --format=%S source-tag source-a >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log --format=%S paints symmetric ranges' '
+	cat >expect <<-\EOF &&
+	source-b
+	source-a
+	EOF
+	git log --format=%S source-a...source-b >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '%S in git log --format works with other placeholders (part 1)' '
+	git log --format="source-b %h" source-b >expect &&
+	git log --format="%S %h" source-b >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '%S in git log --format works with other placeholders (part 2)' '
+	git log --format="%h source-b" source-b >expect &&
+	git log --format="%h %S" source-b >actual &&
+	test_cmp expect actual
+'
+
+test_done