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

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

1 files changed, 207 insertions, 0 deletions

diff --git a/third_party/git/t/t6026-merge-attr.sh b/third_party/git/t/t6026-merge-attr.sh
new file mode 100755
index 000000000000..8f9b48a4937b
--- /dev/null
+++ b/third_party/git/t/t6026-merge-attr.sh
@@ -0,0 +1,207 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Junio C Hamano
+#
+
+test_description='per path merge controlled by merge attribute'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	for f in text binary union
+	do
+		echo Initial >$f && git add $f || return 1
+	done &&
+	test_tick &&
+	git commit -m Initial &&
+
+	git branch side &&
+	for f in text binary union
+	do
+		echo Master >>$f && git add $f || return 1
+	done &&
+	test_tick &&
+	git commit -m Master &&
+
+	git checkout side &&
+	for f in text binary union
+	do
+		echo Side >>$f && git add $f || return 1
+	done &&
+	test_tick &&
+	git commit -m Side &&
+
+	git tag anchor
+'
+
+test_expect_success merge '
+
+	{
+		echo "binary -merge"
+		echo "union merge=union"
+	} >.gitattributes &&
+
+	if git merge master
+	then
+		echo Gaah, should have conflicted
+		false
+	else
+		echo Ok, conflicted.
+	fi
+'
+
+test_expect_success 'check merge result in index' '
+
+	git ls-files -u | grep binary &&
+	git ls-files -u | grep text &&
+	! (git ls-files -u | grep union)
+
+'
+
+test_expect_success 'check merge result in working tree' '
+
+	git cat-file -p HEAD:binary >binary-orig &&
+	grep "<<<<<<<" text &&
+	cmp binary-orig binary &&
+	! grep "<<<<<<<" union &&
+	grep Master union &&
+	grep Side union
+
+'
+
+test_expect_success 'retry the merge with longer context' '
+	echo text conflict-marker-size=32 >>.gitattributes &&
+	git checkout -m text &&
+	sed -ne "/^\([<=>]\)\1\1\1*/{
+		s/ .*$//
+		p
+	}" >actual text &&
+	grep ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" actual &&
+	grep "================================" actual &&
+	grep "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<" actual
+'
+
+cat >./custom-merge <<\EOF
+#!/bin/sh
+
+orig="$1" ours="$2" theirs="$3" exit="$4" path=$5
+(
+	echo "orig is $orig"
+	echo "ours is $ours"
+	echo "theirs is $theirs"
+	echo "path is $path"
+	echo "=== orig ==="
+	cat "$orig"
+	echo "=== ours ==="
+	cat "$ours"
+	echo "=== theirs ==="
+	cat "$theirs"
+) >"$ours+"
+cat "$ours+" >"$ours"
+rm -f "$ours+"
+exit "$exit"
+EOF
+chmod +x ./custom-merge
+
+test_expect_success 'custom merge backend' '
+
+	echo "* merge=union" >.gitattributes &&
+	echo "text merge=custom" >>.gitattributes &&
+
+	git reset --hard anchor &&
+	git config --replace-all \
+	merge.custom.driver "./custom-merge %O %A %B 0 %P" &&
+	git config --replace-all \
+	merge.custom.name "custom merge driver for testing" &&
+
+	git merge master &&
+
+	cmp binary union &&
+	sed -e 1,3d text >check-1 &&
+	o=$(git unpack-file master^:text) &&
+	a=$(git unpack-file side^:text) &&
+	b=$(git unpack-file master:text) &&
+	sh -c "./custom-merge $o $a $b 0 'text'" &&
+	sed -e 1,3d $a >check-2 &&
+	cmp check-1 check-2 &&
+	rm -f $o $a $b
+'
+
+test_expect_success 'custom merge backend' '
+
+	git reset --hard anchor &&
+	git config --replace-all \
+	merge.custom.driver "./custom-merge %O %A %B 1 %P" &&
+	git config --replace-all \
+	merge.custom.name "custom merge driver for testing" &&
+
+	if git merge master
+	then
+		echo "Eh? should have conflicted"
+		false
+	else
+		echo "Ok, conflicted"
+	fi &&
+
+	cmp binary union &&
+	sed -e 1,3d text >check-1 &&
+	o=$(git unpack-file master^:text) &&
+	a=$(git unpack-file anchor:text) &&
+	b=$(git unpack-file master:text) &&
+	sh -c "./custom-merge $o $a $b 0 'text'" &&
+	sed -e 1,3d $a >check-2 &&
+	cmp check-1 check-2 &&
+	sed -e 1,3d -e 4q $a >check-3 &&
+	echo "path is text" >expect &&
+	cmp expect check-3 &&
+	rm -f $o $a $b
+'
+
+test_expect_success 'up-to-date merge without common ancestor' '
+	test_create_repo repo1 &&
+	test_create_repo repo2 &&
+	test_tick &&
+	(
+		cd repo1 &&
+		>a &&
+		git add a &&
+		git commit -m initial
+	) &&
+	test_tick &&
+	(
+		cd repo2 &&
+		git commit --allow-empty -m initial
+	) &&
+	test_tick &&
+	(
+		cd repo1 &&
+		git fetch ../repo2 master &&
+		git merge --allow-unrelated-histories FETCH_HEAD
+	)
+'
+
+test_expect_success 'custom merge does not lock index' '
+	git reset --hard anchor &&
+	write_script sleep-an-hour.sh <<-\EOF &&
+		sleep 3600 &
+		echo $! >sleep.pid
+	EOF
+
+	test_write_lines >.gitattributes \
+		"* merge=ours" "text merge=sleep-an-hour" &&
+	test_config merge.ours.driver true &&
+	test_config merge.sleep-an-hour.driver ./sleep-an-hour.sh &&
+
+	# We are testing that the custom merge driver does not block
+	# index.lock on Windows due to an inherited file handle.
+	# To ensure that the backgrounded process ran sufficiently
+	# long (and has been started in the first place), we do not
+	# ignore the result of the kill command.
+	# By packaging the command in test_when_finished, we get both
+	# the correctness check and the clean-up.
+	test_when_finished "kill \$(cat sleep.pid)" &&
+	git merge master
+'
+
+test_done