From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 16:47:53 +0200
Subject: Adding upstream version 1:2.39.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 t/t7610-mergetool.sh | 863 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 863 insertions(+)
 create mode 100755 t/t7610-mergetool.sh

(limited to 't/t7610-mergetool.sh')

diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
new file mode 100755
index 0000000..7b95702
--- /dev/null
+++ b/t/t7610-mergetool.sh
@@ -0,0 +1,863 @@
+#!/bin/sh
+#
+# Copyright (c) 2008 Charles Bailey
+#
+
+test_description='git mergetool
+
+Testing basic merge tool invocation'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+
+# All the mergetool test work by checking out a temporary branch based
+# off 'branch1' and then merging in main and checking the results of
+# running mergetool
+
+test_expect_success 'setup' '
+	test_config rerere.enabled true &&
+	echo main >file1 &&
+	echo main spaced >"spaced name" &&
+	echo main file11 >file11 &&
+	echo main file12 >file12 &&
+	echo main file13 >file13 &&
+	echo main file14 >file14 &&
+	mkdir subdir &&
+	echo main sub >subdir/file3 &&
+	test_create_repo submod &&
+	(
+		cd submod &&
+		: >foo &&
+		git add foo &&
+		git commit -m "Add foo"
+	) &&
+	git submodule add file:///dev/null submod &&
+	git add file1 "spaced name" file1[1-4] subdir/file3 .gitmodules submod &&
+	git commit -m "add initial versions" &&
+
+	git checkout -b branch1 main &&
+	git submodule update -N &&
+	echo branch1 change >file1 &&
+	echo branch1 newfile >file2 &&
+	echo branch1 spaced >"spaced name" &&
+	echo branch1 both added >both &&
+	echo branch1 change file11 >file11 &&
+	echo branch1 change file13 >file13 &&
+	echo branch1 sub >subdir/file3 &&
+	(
+		cd submod &&
+		echo branch1 submodule >bar &&
+		git add bar &&
+		git commit -m "Add bar on branch1" &&
+		git checkout -b submod-branch1
+	) &&
+	git add file1 "spaced name" file11 file13 file2 subdir/file3 submod &&
+	git add both &&
+	git rm file12 &&
+	git commit -m "branch1 changes" &&
+
+	git checkout -b delete-base branch1 &&
+	mkdir -p a/a &&
+	test_write_lines one two 3 4 >a/a/file.txt &&
+	git add a/a/file.txt &&
+	git commit -m"base file" &&
+	git checkout -b move-to-b delete-base &&
+	mkdir -p b/b &&
+	git mv a/a/file.txt b/b/file.txt &&
+	test_write_lines one two 4 >b/b/file.txt &&
+	git commit -a -m"move to b" &&
+	git checkout -b move-to-c delete-base &&
+	mkdir -p c/c &&
+	git mv a/a/file.txt c/c/file.txt &&
+	test_write_lines one two 3 >c/c/file.txt &&
+	git commit -a -m"move to c" &&
+
+	git checkout -b stash1 main &&
+	echo stash1 change file11 >file11 &&
+	git add file11 &&
+	git commit -m "stash1 changes" &&
+
+	git checkout -b stash2 main &&
+	echo stash2 change file11 >file11 &&
+	git add file11 &&
+	git commit -m "stash2 changes" &&
+
+	git checkout main &&
+	git submodule update -N &&
+	echo main updated >file1 &&
+	echo main new >file2 &&
+	echo main updated spaced >"spaced name" &&
+	echo main both added >both &&
+	echo main updated file12 >file12 &&
+	echo main updated file14 >file14 &&
+	echo main new sub >subdir/file3 &&
+	(
+		cd submod &&
+		echo main submodule >bar &&
+		git add bar &&
+		git commit -m "Add bar on main" &&
+		git checkout -b submod-main
+	) &&
+	git add file1 "spaced name" file12 file14 file2 subdir/file3 submod &&
+	git add both &&
+	git rm file11 &&
+	git commit -m "main updates" &&
+
+	git clean -fdx &&
+	git checkout -b order-file-start main &&
+	echo start >a &&
+	echo start >b &&
+	git add a b &&
+	git commit -m start &&
+	git checkout -b order-file-side1 order-file-start &&
+	echo side1 >a &&
+	echo side1 >b &&
+	git add a b &&
+	git commit -m side1 &&
+	git checkout -b order-file-side2 order-file-start &&
+	echo side2 >a &&
+	echo side2 >b &&
+	git add a b &&
+	git commit -m side2 &&
+
+	git config merge.tool mytool &&
+	git config mergetool.mytool.cmd "cat \"\$REMOTE\" >\"\$MERGED\"" &&
+	git config mergetool.mytool.trustExitCode true &&
+	git config mergetool.mybase.cmd "cat \"\$BASE\" >\"\$MERGED\"" &&
+	git config mergetool.mybase.trustExitCode true
+'
+
+test_expect_success 'custom mergetool' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	yes "" | git mergetool both &&
+	yes "" | git mergetool file1 file1 &&
+	yes "" | git mergetool file2 "spaced name" &&
+	yes "" | git mergetool subdir/file3 &&
+	yes "d" | git mergetool file11 &&
+	yes "d" | git mergetool file12 &&
+	yes "l" | git mergetool submod &&
+	echo "main updated" >expect &&
+	test_cmp expect file1 &&
+	echo "main new" >expect &&
+	test_cmp expect file2 &&
+	echo "main new sub" >expect &&
+	test_cmp expect subdir/file3 &&
+	echo "branch1 submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git commit -m "branch1 resolved with mergetool"
+'
+
+test_expect_success 'gui mergetool' '
+	test_config merge.guitool myguitool &&
+	test_config mergetool.myguitool.cmd "(printf \"gui \" && cat \"\$REMOTE\") >\"\$MERGED\"" &&
+	test_config mergetool.myguitool.trustExitCode true &&
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	yes "" | git mergetool --gui both &&
+	yes "" | git mergetool -g file1 file1 &&
+	yes "" | git mergetool --gui file2 "spaced name" &&
+	yes "" | git mergetool --gui subdir/file3 &&
+	yes "d" | git mergetool --gui file11 &&
+	yes "d" | git mergetool --gui file12 &&
+	yes "l" | git mergetool --gui submod &&
+	echo "gui main updated" >expect &&
+	test_cmp expect file1 &&
+	echo "gui main new" >expect &&
+	test_cmp expect file2 &&
+	echo "gui main new sub" >expect &&
+	test_cmp expect subdir/file3 &&
+	echo "branch1 submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git commit -m "branch1 resolved with mergetool"
+'
+
+test_expect_success 'gui mergetool without merge.guitool set falls back to merge.tool' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	yes "" | git mergetool --gui both &&
+	yes "" | git mergetool -g file1 file1 &&
+	yes "" | git mergetool --gui file2 "spaced name" &&
+	yes "" | git mergetool --gui subdir/file3 &&
+	yes "d" | git mergetool --gui file11 &&
+	yes "d" | git mergetool --gui file12 &&
+	yes "l" | git mergetool --gui submod &&
+	echo "main updated" >expect &&
+	test_cmp expect file1 &&
+	echo "main new" >expect &&
+	test_cmp expect file2 &&
+	echo "main new sub" >expect &&
+	test_cmp expect subdir/file3 &&
+	echo "branch1 submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git commit -m "branch1 resolved with mergetool"
+'
+
+test_expect_success 'mergetool crlf' '
+	test_when_finished "git reset --hard" &&
+	# This test_config line must go after the above reset line so that
+	# core.autocrlf is unconfigured before reset runs.  (The
+	# test_config command uses test_when_finished internally and
+	# test_when_finished is LIFO.)
+	test_config core.autocrlf true &&
+	git checkout -b test$test_count branch1 &&
+	test_must_fail git merge main &&
+	yes "" | git mergetool file1 &&
+	yes "" | git mergetool file2 &&
+	yes "" | git mergetool "spaced name" &&
+	yes "" | git mergetool both &&
+	yes "" | git mergetool subdir/file3 &&
+	yes "d" | git mergetool file11 &&
+	yes "d" | git mergetool file12 &&
+	yes "r" | git mergetool submod &&
+	test "$(printf x | cat file1 -)" = "$(printf "main updated\r\nx")" &&
+	test "$(printf x | cat file2 -)" = "$(printf "main new\r\nx")" &&
+	test "$(printf x | cat subdir/file3 -)" = "$(printf "main new sub\r\nx")" &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git commit -m "branch1 resolved with mergetool - autocrlf"
+'
+
+test_expect_success 'mergetool in subdir' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	(
+		cd subdir &&
+		test_must_fail git merge main &&
+		yes "" | git mergetool file3 &&
+		echo "main new sub" >expect &&
+		test_cmp expect file3
+	)
+'
+
+test_expect_success 'mergetool on file in parent dir' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	(
+		cd subdir &&
+		test_must_fail git merge main &&
+		yes "" | git mergetool file3 &&
+		yes "" | git mergetool ../file1 &&
+		yes "" | git mergetool ../file2 ../spaced\ name &&
+		yes "" | git mergetool ../both &&
+		yes "d" | git mergetool ../file11 &&
+		yes "d" | git mergetool ../file12 &&
+		yes "l" | git mergetool ../submod &&
+		echo "main updated" >expect &&
+		test_cmp expect ../file1 &&
+		echo "main new" >expect &&
+		test_cmp expect ../file2 &&
+		echo "branch1 submodule" >expect &&
+		test_cmp expect ../submod/bar &&
+		git commit -m "branch1 resolved with mergetool - subdir"
+	)
+'
+
+test_expect_success 'mergetool skips autoresolved' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "d" | git mergetool file11 &&
+	yes "d" | git mergetool file12 &&
+	yes "l" | git mergetool submod &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging"
+'
+
+test_expect_success 'mergetool merges all from subdir (rerere disabled)' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_config rerere.enabled false &&
+	(
+		cd subdir &&
+		test_must_fail git merge main &&
+		yes "r" | git mergetool ../submod &&
+		yes "d" "d" | git mergetool --no-prompt &&
+		echo "main updated" >expect &&
+		test_cmp expect ../file1 &&
+		echo "main new" >expect &&
+		test_cmp expect ../file2 &&
+		echo "main new sub" >expect &&
+		test_cmp expect file3 &&
+		( cd .. && git submodule update -N ) &&
+		echo "main submodule" >expect &&
+		test_cmp expect ../submod/bar &&
+		git commit -m "branch2 resolved by mergetool from subdir"
+	)
+'
+
+test_expect_success 'mergetool merges all from subdir (rerere enabled)' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_config rerere.enabled true &&
+	rm -rf .git/rr-cache &&
+	(
+		cd subdir &&
+		test_must_fail git merge main &&
+		yes "r" | git mergetool ../submod &&
+		yes "d" "d" | git mergetool --no-prompt &&
+		echo "main updated" >expect &&
+		test_cmp expect ../file1 &&
+		echo "main new" >expect &&
+		test_cmp expect ../file2 &&
+		echo "main new sub" >expect &&
+		test_cmp expect file3 &&
+		( cd .. && git submodule update -N ) &&
+		echo "main submodule" >expect &&
+		test_cmp expect ../submod/bar &&
+		git commit -m "branch2 resolved by mergetool from subdir"
+	)
+'
+
+test_expect_success 'mergetool skips resolved paths when rerere is active' '
+	test_when_finished "git reset --hard" &&
+	test_config rerere.enabled true &&
+	rm -rf .git/rr-cache &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	yes "l" | git mergetool --no-prompt submod &&
+	yes "d" "d" | git mergetool --no-prompt &&
+	git submodule update -N &&
+	output="$(yes "n" | git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging"
+'
+
+test_expect_success 'conflicted stash sets up rerere'  '
+	test_when_finished "git reset --hard" &&
+	test_config rerere.enabled true &&
+	git checkout stash1 &&
+	echo "Conflicting stash content" >file11 &&
+	git stash &&
+
+	git checkout --detach stash2 &&
+	test_must_fail git stash apply &&
+
+	test -n "$(git ls-files -u)" &&
+	conflicts="$(git rerere remaining)" &&
+	test "$conflicts" = "file11" &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" != "No files need merging" &&
+
+	git commit -am "save the stash resolution" &&
+
+	git reset --hard stash2 &&
+	test_must_fail git stash apply &&
+
+	test -n "$(git ls-files -u)" &&
+	conflicts="$(git rerere remaining)" &&
+	test -z "$conflicts" &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging"
+'
+
+test_expect_success 'mergetool takes partial path' '
+	test_when_finished "git reset --hard" &&
+	test_config rerere.enabled false &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+
+	yes "" | git mergetool subdir &&
+
+	echo "main new sub" >expect &&
+	test_cmp expect subdir/file3
+'
+
+test_expect_success 'mergetool delete/delete conflict' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count move-to-c &&
+	test_must_fail git merge move-to-b &&
+	echo d | git mergetool a/a/file.txt &&
+	! test -f a/a/file.txt &&
+	git reset --hard &&
+	test_must_fail git merge move-to-b &&
+	echo m | git mergetool a/a/file.txt &&
+	test -f b/b/file.txt &&
+	git reset --hard &&
+	test_must_fail git merge move-to-b &&
+	! echo a | git mergetool a/a/file.txt &&
+	! test -f a/a/file.txt
+'
+
+test_expect_success 'mergetool produces no errors when keepBackup is used' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count move-to-c &&
+	test_config mergetool.keepBackup true &&
+	test_must_fail git merge move-to-b &&
+	echo d | git mergetool a/a/file.txt 2>actual &&
+	test_must_be_empty actual &&
+	! test -d a
+'
+
+test_expect_success 'mergetool honors tempfile config for deleted files' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count move-to-c &&
+	test_config mergetool.keepTemporaries false &&
+	test_must_fail git merge move-to-b &&
+	echo d | git mergetool a/a/file.txt &&
+	! test -d a
+'
+
+test_expect_success 'mergetool keeps tempfiles when aborting delete/delete' '
+	test_when_finished "git reset --hard" &&
+	test_when_finished "git clean -fdx" &&
+	git checkout -b test$test_count move-to-c &&
+	test_config mergetool.keepTemporaries true &&
+	test_must_fail git merge move-to-b &&
+	! test_write_lines a n | git mergetool a/a/file.txt &&
+	test -d a/a &&
+	cat >expect <<-\EOF &&
+	file_BASE_.txt
+	file_LOCAL_.txt
+	file_REMOTE_.txt
+	EOF
+	ls -1 a/a | sed -e "s/[0-9]*//g" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'deleted vs modified submodule' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	mv submod submod-movedaside &&
+	git rm --cached submod &&
+	git commit -m "Submodule deleted from branch" &&
+	git checkout -b test$test_count.a test$test_count &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "r" | git mergetool submod &&
+	rmdir submod && mv submod-movedaside submod &&
+	echo "branch1 submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping module" &&
+
+	mv submod submod-movedaside &&
+	git checkout -b test$test_count.b test$test_count &&
+	git submodule update -N &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "l" | git mergetool submod &&
+	test ! -e submod &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by deleting module" &&
+
+	mv submod-movedaside submod &&
+	git checkout -b test$test_count.c main &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "r" | git mergetool submod &&
+	test ! -e submod &&
+	test -d submod.orig &&
+	git submodule update -N &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by deleting module" &&
+	mv submod.orig submod &&
+
+	git checkout -b test$test_count.d main &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "l" | git mergetool submod &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping module"
+'
+
+test_expect_success 'file vs modified submodule' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	mv submod submod-movedaside &&
+	git rm --cached submod &&
+	echo not a submodule >submod &&
+	git add submod &&
+	git commit -m "Submodule path becomes file" &&
+	git checkout -b test$test_count.a branch1 &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "r" | git mergetool submod &&
+	rmdir submod && mv submod-movedaside submod &&
+	echo "branch1 submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping module" &&
+
+	mv submod submod-movedaside &&
+	git checkout -b test$test_count.b test$test_count &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+	then
+		yes "c" | git mergetool submod~HEAD &&
+		git rm submod &&
+		git mv submod~HEAD submod
+	else
+		yes "l" | git mergetool submod
+	fi &&
+	git submodule update -N &&
+	echo "not a submodule" >expect &&
+	test_cmp expect submod &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping file" &&
+
+	git checkout -b test$test_count.c main &&
+	rmdir submod && mv submod-movedaside submod &&
+	test ! -e submod.orig &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+	then
+		mv submod submod.orig &&
+		git rm --cached submod &&
+		yes "c" | git mergetool submod~test19 &&
+		git mv submod~test19 submod
+	else
+		yes "r" | git mergetool submod
+	fi &&
+	test -d submod.orig &&
+	git submodule update -N &&
+	echo "not a submodule" >expect &&
+	test_cmp expect submod &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping file" &&
+
+	git checkout -b test$test_count.d main &&
+	rmdir submod && mv submod.orig submod &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	yes "" | git mergetool file1 file2 spaced\ name subdir/file3 &&
+	yes "" | git mergetool both &&
+	yes "d" | git mergetool file11 file12 &&
+	yes "l" | git mergetool submod &&
+	if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+	then
+		yes "d" | git mergetool submod~test19
+	fi &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	output="$(git mergetool --no-prompt)" &&
+	test "$output" = "No files need merging" &&
+	git commit -m "Merge resolved by keeping module"
+'
+
+test_expect_success 'submodule in subdirectory' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	git submodule update -N &&
+	(
+		cd subdir &&
+		test_create_repo subdir_module &&
+		(
+		cd subdir_module &&
+		: >file15 &&
+		git add file15 &&
+		git commit -m "add initial versions"
+		)
+	) &&
+	test_when_finished "rm -rf subdir/subdir_module" &&
+	git submodule add file:///dev/null subdir/subdir_module &&
+	git add subdir/subdir_module &&
+	git commit -m "add submodule in subdirectory" &&
+
+	git checkout -b test$test_count.a test$test_count &&
+	git submodule update -N &&
+	(
+	cd subdir/subdir_module &&
+		git checkout -b super10.a &&
+		echo test$test_count.a >file15 &&
+		git add file15 &&
+		git commit -m "on branch 10.a"
+	) &&
+	git add subdir/subdir_module &&
+	git commit -m "change submodule in subdirectory on test$test_count.a" &&
+
+	git checkout -b test$test_count.b test$test_count &&
+	git submodule update -N &&
+	(
+		cd subdir/subdir_module &&
+		git checkout -b super10.b &&
+		echo test$test_count.b >file15 &&
+		git add file15 &&
+		git commit -m "on branch 10.b"
+	) &&
+	git add subdir/subdir_module &&
+	git commit -m "change submodule in subdirectory on test$test_count.b" &&
+
+	test_must_fail git merge test$test_count.a &&
+	(
+		cd subdir &&
+		yes "l" | git mergetool subdir_module
+	) &&
+	echo "test$test_count.b" >expect &&
+	test_cmp expect subdir/subdir_module/file15 &&
+	git submodule update -N &&
+	echo "test$test_count.b" >expect &&
+	test_cmp expect subdir/subdir_module/file15 &&
+	git reset --hard &&
+	git submodule update -N &&
+
+	test_must_fail git merge test$test_count.a &&
+	yes "r" | git mergetool subdir/subdir_module &&
+	echo "test$test_count.b" >expect &&
+	test_cmp expect subdir/subdir_module/file15 &&
+	git submodule update -N &&
+	echo "test$test_count.a" >expect &&
+	test_cmp expect subdir/subdir_module/file15 &&
+	git commit -m "branch1 resolved with mergetool"
+'
+
+test_expect_success 'directory vs modified submodule' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	mv submod submod-movedaside &&
+	git rm --cached submod &&
+	mkdir submod &&
+	echo not a submodule >submod/file16 &&
+	git add submod/file16 &&
+	git commit -m "Submodule path becomes directory" &&
+
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	yes "l" | git mergetool submod &&
+	echo "not a submodule" >expect &&
+	test_cmp expect submod/file16 &&
+	rm -rf submod.orig &&
+
+	git reset --hard &&
+	test_must_fail git merge main &&
+	test -n "$(git ls-files -u)" &&
+	test ! -e submod.orig &&
+	if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+	then
+		yes "r" | git mergetool submod~main &&
+		git mv submod submod.orig &&
+		git mv submod~main submod
+	else
+		yes "r" | git mergetool submod
+	fi &&
+	test -d submod.orig &&
+	echo "not a submodule" >expect &&
+	test_cmp expect submod.orig/file16 &&
+	rm -r submod.orig &&
+	mv submod-movedaside/.git submod &&
+	( cd submod && git clean -f && git reset --hard ) &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+	git reset --hard &&
+	rm -rf submod-movedaside &&
+
+	git checkout -b test$test_count.c main &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	yes "l" | git mergetool submod &&
+	git submodule update -N &&
+	echo "main submodule" >expect &&
+	test_cmp expect submod/bar &&
+
+	git reset --hard &&
+	git submodule update -N &&
+	test_must_fail git merge test$test_count &&
+	test -n "$(git ls-files -u)" &&
+	test ! -e submod.orig &&
+	yes "r" | git mergetool submod &&
+	echo "not a submodule" >expect &&
+	test_cmp expect submod/file16 &&
+
+	git reset --hard main &&
+	( cd submod && git clean -f && git reset --hard ) &&
+	git submodule update -N
+'
+
+test_expect_success 'file with no base' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_must_fail git merge main &&
+	git mergetool --no-prompt --tool mybase -- both &&
+	test_must_be_empty both
+'
+
+test_expect_success 'custom commands override built-ins' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_config mergetool.defaults.cmd "cat \"\$REMOTE\" >\"\$MERGED\"" &&
+	test_config mergetool.defaults.trustExitCode true &&
+	test_must_fail git merge main &&
+	git mergetool --no-prompt --tool defaults -- both &&
+	echo main both added >expected &&
+	test_cmp expected both
+'
+
+test_expect_success 'filenames seen by tools start with ./' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_config mergetool.writeToTemp false &&
+	test_config mergetool.myecho.cmd "echo \"\$LOCAL\"" &&
+	test_config mergetool.myecho.trustExitCode true &&
+	test_must_fail git merge main &&
+	git mergetool --no-prompt --tool myecho -- both >actual &&
+	grep ^\./both_LOCAL_ actual
+'
+
+test_lazy_prereq MKTEMP '
+	tempdir=$(mktemp -d -t foo.XXXXXX) &&
+	test -d "$tempdir" &&
+	rmdir "$tempdir"
+'
+
+test_expect_success MKTEMP 'temporary filenames are used with mergetool.writeToTemp' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count branch1 &&
+	test_config mergetool.writeToTemp true &&
+	test_config mergetool.myecho.cmd "echo \"\$LOCAL\"" &&
+	test_config mergetool.myecho.trustExitCode true &&
+	test_must_fail git merge main &&
+	git mergetool --no-prompt --tool myecho -- both >actual &&
+	! grep ^\./both_LOCAL_ actual &&
+	grep /both_LOCAL_ actual
+'
+
+test_expect_success 'diff.orderFile configuration is honored' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count order-file-side2 &&
+	test_config diff.orderFile order-file &&
+	test_config mergetool.myecho.cmd "echo \"\$LOCAL\"" &&
+	test_config mergetool.myecho.trustExitCode true &&
+	echo b >order-file &&
+	echo a >>order-file &&
+	test_must_fail git merge order-file-side1 &&
+	cat >expect <<-\EOF &&
+		Merging:
+		b
+		a
+	EOF
+
+	# make sure "order-file" that is ambiguous between
+	# rev and path is understood correctly.
+	git branch order-file HEAD &&
+
+	git mergetool --no-prompt --tool myecho >output &&
+	git grep --no-index -h -A2 Merging: output >actual &&
+	test_cmp expect actual
+'
+test_expect_success 'mergetool -Oorder-file is honored' '
+	test_when_finished "git reset --hard" &&
+	git checkout -b test$test_count order-file-side2 &&
+	test_config diff.orderFile order-file &&
+	test_config mergetool.myecho.cmd "echo \"\$LOCAL\"" &&
+	test_config mergetool.myecho.trustExitCode true &&
+	echo b >order-file &&
+	echo a >>order-file &&
+	test_must_fail git merge order-file-side1 &&
+	cat >expect <<-\EOF &&
+		Merging:
+		a
+		b
+	EOF
+	git mergetool -O/dev/null --no-prompt --tool myecho >output &&
+	git grep --no-index -h -A2 Merging: output >actual &&
+	test_cmp expect actual &&
+	git reset --hard &&
+
+	git config --unset diff.orderFile &&
+	test_must_fail git merge order-file-side1 &&
+	cat >expect <<-\EOF &&
+		Merging:
+		b
+		a
+	EOF
+	git mergetool -Oorder-file --no-prompt --tool myecho >output &&
+	git grep --no-index -h -A2 Merging: output >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'mergetool --tool-help shows recognized tools' '
+	# Check a few known tools are correctly shown
+	git mergetool --tool-help >mergetools &&
+	grep vimdiff mergetools &&
+	grep vimdiff3 mergetools &&
+	grep gvimdiff2 mergetools &&
+	grep araxis mergetools &&
+	grep xxdiff mergetools &&
+	grep meld mergetools
+'
+
+test_expect_success 'mergetool hideResolved' '
+	test_config mergetool.hideResolved true &&
+	test_when_finished "git reset --hard" &&
+	git checkout -b test${test_count}_b main &&
+	test_write_lines >file1 base "" a &&
+	git commit -a -m "base" &&
+	test_write_lines >file1 base "" c &&
+	git commit -a -m "remote update" &&
+	git checkout -b test${test_count}_a HEAD~ &&
+	test_write_lines >file1 local "" b &&
+	git commit -a -m "local update" &&
+	test_must_fail git merge test${test_count}_b &&
+	yes "" | git mergetool file1 &&
+	test_write_lines >expect local "" c &&
+	test_cmp expect file1 &&
+	git commit -m "test resolved with mergetool"
+'
+
+test_done
-- 
cgit v1.2.3