about summary refs log tree commit diff
path: root/t/t7800-difftool.sh
blob: 6bac9ed180e7342b34401b2d6af9e83b4472f08d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
#!/bin/sh
#
# Copyright (c) 2009, 2010, 2012, 2013 David Aguilar
#

test_description='git-difftool

Testing basic diff tool invocation
'

. ./test-lib.sh

difftool_test_setup ()
{
	test_config diff.tool test-tool &&
	test_config difftool.test-tool.cmd 'cat "$LOCAL"' &&
	test_config difftool.bogus-tool.cmd false
}

prompt_given ()
{
	prompt="$1"
	test "$prompt" = "Launch 'test-tool' [Y/n]? branch"
}

test_expect_success 'basic usage requires no repo' '
	test_expect_code 129 git difftool -h >output &&
	test_i18ngrep ^usage: output &&
	# create a ceiling directory to prevent Git from finding a repo
	mkdir -p not/repo &&
	test_when_finished rm -r not &&
	test_expect_code 129 \
	env GIT_CEILING_DIRECTORIES="$(pwd)/not" \
	git -C not/repo difftool -h >output &&
	test_i18ngrep ^usage: output
'

# Create a file on master and change it on branch
test_expect_success 'setup' '
	echo master >file &&
	git add file &&
	git commit -m "added file" &&

	git checkout -b branch master &&
	echo branch >file &&
	git commit -a -m "branch changed file" &&
	git checkout master
'

# Configure a custom difftool.<tool>.cmd and use it
test_expect_success 'custom commands' '
	difftool_test_setup &&
	test_config difftool.test-tool.cmd "cat \"\$REMOTE\"" &&
	echo master >expect &&
	git difftool --no-prompt branch >actual &&
	test_cmp expect actual &&

	test_config difftool.test-tool.cmd "cat \"\$LOCAL\"" &&
	echo branch >expect &&
	git difftool --no-prompt branch >actual &&
	test_cmp expect actual
'

test_expect_success 'custom tool commands override built-ins' '
	test_config difftool.vimdiff.cmd "cat \"\$REMOTE\"" &&
	echo master >expect &&
	git difftool --tool vimdiff --no-prompt branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool ignores bad --tool values' '
	: >expect &&
	test_must_fail \
		git difftool --no-prompt --tool=bad-tool branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool forwards arguments to diff' '
	difftool_test_setup &&
	>for-diff &&
	git add for-diff &&
	echo changes>for-diff &&
	git add for-diff &&
	: >expect &&
	git difftool --cached --no-prompt -- for-diff >actual &&
	test_cmp expect actual &&
	git reset -- for-diff &&
	rm for-diff
'

test_expect_success 'difftool ignores exit code' '
	test_config difftool.error.cmd false &&
	git difftool -y -t error branch
'

test_expect_success 'difftool forwards exit code with --trust-exit-code' '
	test_config difftool.error.cmd false &&
	test_must_fail git difftool -y --trust-exit-code -t error branch
'

test_expect_success 'difftool forwards exit code with --trust-exit-code for built-ins' '
	test_config difftool.vimdiff.path false &&
	test_must_fail git difftool -y --trust-exit-code -t vimdiff branch
'

test_expect_success 'difftool honors difftool.trustExitCode = true' '
	test_config difftool.error.cmd false &&
	test_config difftool.trustExitCode true &&
	test_must_fail git difftool -y -t error branch
'

test_expect_success 'difftool honors difftool.trustExitCode = false' '
	test_config difftool.error.cmd false &&
	test_config difftool.trustExitCode false &&
	git difftool -y -t error branch
'

test_expect_success 'difftool ignores exit code with --no-trust-exit-code' '
	test_config difftool.error.cmd false &&
	test_config difftool.trustExitCode true &&
	git difftool -y --no-trust-exit-code -t error branch
'

test_expect_success 'difftool stops on error with --trust-exit-code' '
	test_when_finished "rm -f for-diff .git/fail-right-file" &&
	test_when_finished "git reset -- for-diff" &&
	write_script .git/fail-right-file <<-\EOF &&
	echo "$2"
	exit 1
	EOF
	>for-diff &&
	git add for-diff &&
	echo file >expect &&
	test_must_fail git difftool -y --trust-exit-code \
		--extcmd .git/fail-right-file branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool honors exit status if command not found' '
	test_config difftool.nonexistent.cmd i-dont-exist &&
	test_config difftool.trustExitCode false &&
	test_must_fail git difftool -y -t nonexistent branch
'

test_expect_success 'difftool honors --gui' '
	difftool_test_setup &&
	test_config merge.tool bogus-tool &&
	test_config diff.tool bogus-tool &&
	test_config diff.guitool test-tool &&

	echo branch >expect &&
	git difftool --no-prompt --gui branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --gui last setting wins' '
	difftool_test_setup &&
	: >expect &&
	git difftool --no-prompt --gui --no-gui >actual &&
	test_cmp expect actual &&

	test_config merge.tool bogus-tool &&
	test_config diff.tool bogus-tool &&
	test_config diff.guitool test-tool &&
	echo branch >expect &&
	git difftool --no-prompt --no-gui --gui branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --gui works without configured diff.guitool' '
	difftool_test_setup &&
	echo branch >expect &&
	git difftool --no-prompt --gui branch >actual &&
	test_cmp expect actual
'

# Specify the diff tool using $GIT_DIFF_TOOL
test_expect_success 'GIT_DIFF_TOOL variable' '
	difftool_test_setup &&
	git config --unset diff.tool &&
	echo branch >expect &&
	GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
	test_cmp expect actual
'

# Test the $GIT_*_TOOL variables and ensure
# that $GIT_DIFF_TOOL always wins unless --tool is specified
test_expect_success 'GIT_DIFF_TOOL overrides' '
	difftool_test_setup &&
	test_config diff.tool bogus-tool &&
	test_config merge.tool bogus-tool &&

	echo branch >expect &&
	GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
	test_cmp expect actual &&

	test_config diff.tool bogus-tool &&
	test_config merge.tool bogus-tool &&
	GIT_DIFF_TOOL=bogus-tool \
		git difftool --no-prompt --tool=test-tool branch >actual &&
	test_cmp expect actual
'

# Test that we don't have to pass --no-prompt to difftool
# when $GIT_DIFFTOOL_NO_PROMPT is true
test_expect_success 'GIT_DIFFTOOL_NO_PROMPT variable' '
	difftool_test_setup &&
	echo branch >expect &&
	GIT_DIFFTOOL_NO_PROMPT=true git difftool branch >actual &&
	test_cmp expect actual
'

# git-difftool supports the difftool.prompt variable.
# Test that GIT_DIFFTOOL_PROMPT can override difftool.prompt = false
test_expect_success 'GIT_DIFFTOOL_PROMPT variable' '
	difftool_test_setup &&
	test_config difftool.prompt false &&
	echo >input &&
	GIT_DIFFTOOL_PROMPT=true git difftool branch <input >output &&
	prompt=$(tail -1 <output) &&
	prompt_given "$prompt"
'

# Test that we don't have to pass --no-prompt when difftool.prompt is false
test_expect_success 'difftool.prompt config variable is false' '
	difftool_test_setup &&
	test_config difftool.prompt false &&
	echo branch >expect &&
	git difftool branch >actual &&
	test_cmp expect actual
'

# Test that we don't have to pass --no-prompt when mergetool.prompt is false
test_expect_success 'difftool merge.prompt = false' '
	difftool_test_setup &&
	test_might_fail git config --unset difftool.prompt &&
	test_config mergetool.prompt false &&
	echo branch >expect &&
	git difftool branch >actual &&
	test_cmp expect actual
'

# Test that the -y flag can override difftool.prompt = true
test_expect_success 'difftool.prompt can overridden with -y' '
	difftool_test_setup &&
	test_config difftool.prompt true &&
	echo branch >expect &&
	git difftool -y branch >actual &&
	test_cmp expect actual
'

# Test that the --prompt flag can override difftool.prompt = false
test_expect_success 'difftool.prompt can overridden with --prompt' '
	difftool_test_setup &&
	test_config difftool.prompt false &&
	echo >input &&
	git difftool --prompt branch <input >output &&
	prompt=$(tail -1 <output) &&
	prompt_given "$prompt"
'

# Test that the last flag passed on the command-line wins
test_expect_success 'difftool last flag wins' '
	difftool_test_setup &&
	echo branch >expect &&
	git difftool --prompt --no-prompt branch >actual &&
	test_cmp expect actual &&
	echo >input &&
	git difftool --no-prompt --prompt branch <input >output &&
	prompt=$(tail -1 <output) &&
	prompt_given "$prompt"
'

# git-difftool falls back to git-mergetool config variables
# so test that behavior here
test_expect_success 'difftool + mergetool config variables' '
	test_config merge.tool test-tool &&
	test_config mergetool.test-tool.cmd "cat \$LOCAL" &&
	echo branch >expect &&
	git difftool --no-prompt branch >actual &&
	test_cmp expect actual &&
	git difftool --gui --no-prompt branch >actual &&
	test_cmp expect actual &&

	# set merge.tool to something bogus, diff.tool to test-tool
	test_config merge.tool bogus-tool &&
	test_config diff.tool test-tool &&
	git difftool --no-prompt branch >actual &&
	test_cmp expect actual &&
	git difftool --gui --no-prompt branch >actual &&
	test_cmp expect actual &&

	# set merge.tool, diff.tool to something bogus, merge.guitool to test-tool
	test_config diff.tool bogus-tool &&
	test_config merge.guitool test-tool &&
	git difftool --gui --no-prompt branch >actual &&
	test_cmp expect actual &&

	# set merge.tool, diff.tool, merge.guitool to something bogus, diff.guitool to test-tool
	test_config merge.guitool bogus-tool &&
	test_config diff.guitool test-tool &&
	git difftool --gui --no-prompt branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool.<tool>.path' '
	test_config difftool.tkdiff.path echo &&
	git difftool --tool=tkdiff --no-prompt branch >output &&
	grep file output >grep-output &&
	test_line_count = 1 grep-output
'

test_expect_success 'difftool --extcmd=cat' '
	echo branch >expect &&
	echo master >>expect &&
	git difftool --no-prompt --extcmd=cat branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --extcmd cat' '
	echo branch >expect &&
	echo master >>expect &&
	git difftool --no-prompt --extcmd=cat branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool -x cat' '
	echo branch >expect &&
	echo master >>expect &&
	git difftool --no-prompt -x cat branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --extcmd echo arg1' '
	echo file >expect &&
	git difftool --no-prompt \
		--extcmd sh\ -c\ \"echo\ \$1\" branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --extcmd cat arg1' '
	echo master >expect &&
	git difftool --no-prompt \
		--extcmd sh\ -c\ \"cat\ \$1\" branch >actual &&
	test_cmp expect actual
'

test_expect_success 'difftool --extcmd cat arg2' '
	echo branch >expect &&
	git difftool --no-prompt \
		--extcmd sh\ -c\ \"cat\ \\\"\$2\\\"\" branch >actual &&
	test_cmp expect actual
'

# Create a second file on master and a different version on branch
test_expect_success 'setup with 2 files different' '
	echo m2 >file2 &&
	git add file2 &&
	git commit -m "added file2" &&

	git checkout branch &&
	echo br2 >file2 &&
	git add file2 &&
	git commit -a -m "branch changed file2" &&
	git checkout master
'

test_expect_success 'say no to the first file' '
	(echo n && echo) >input &&
	git difftool -x cat branch <input >output &&
	grep m2 output &&
	grep br2 output &&
	! grep master output &&
	! grep branch output
'

test_expect_success 'say no to the second file' '
	(echo && echo n) >input &&
	git difftool -x cat branch <input >output &&
	grep master output &&
	grep branch output &&
	! grep m2 output &&
	! grep br2 output
'

test_expect_success 'ending prompt input with EOF' '
	git difftool -x cat branch </dev/null >output &&
	! grep master output &&
	! grep branch output &&
	! grep m2 output &&
	! grep br2 output
'

test_expect_success 'difftool --tool-help' '
	git difftool --tool-help >output &&
	grep tool output
'

test_expect_success 'setup change in subdirectory' '
	git checkout master &&
	mkdir sub &&
	echo master >sub/sub &&
	git add sub/sub &&
	git commit -m "added sub/sub" &&
	git tag v1 &&
	echo test >>file &&
	echo test >>sub/sub &&
	git add file sub/sub &&
	git commit -m "modified both"
'

test_expect_success 'difftool -d with growing paths' '
	a=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&
	git init growing &&
	(
		cd growing &&
		echo "test -f \"\$2/b\"" | write_script .git/test-for-b.sh &&
		one=$(printf 1 | git hash-object -w --stdin) &&
		two=$(printf 2 | git hash-object -w --stdin) &&
		git update-index --add \
			--cacheinfo 100644,$one,$a --cacheinfo 100644,$two,b &&
		tree1=$(git write-tree) &&
		git update-index --add \
			--cacheinfo 100644,$two,$a --cacheinfo 100644,$one,b &&
		tree2=$(git write-tree) &&
		git checkout -- $a &&
		git difftool -d --extcmd .git/test-for-b.sh $tree1 $tree2
	)
'

run_dir_diff_test () {
	test_expect_success "$1 --no-symlinks" "
		symlinks=--no-symlinks &&
		$2
	"
	test_expect_success SYMLINKS "$1 --symlinks" "
		symlinks=--symlinks &&
		$2
	"
}

run_dir_diff_test 'difftool -d' '
	git difftool -d $symlinks --extcmd ls branch >output &&
	grep sub output &&
	grep file output
'

run_dir_diff_test 'difftool --dir-diff' '
	git difftool --dir-diff $symlinks --extcmd ls branch >output &&
	grep sub output &&
	grep file output
'

run_dir_diff_test 'difftool --dir-diff ignores --prompt' '
	git difftool --dir-diff $symlinks --prompt --extcmd ls branch >output &&
	grep sub output &&
	grep file output
'

run_dir_diff_test 'difftool --dir-diff branch from subdirectory' '
	(
		cd sub &&
		git difftool --dir-diff $symlinks --extcmd ls branch >output &&
		# "sub" must only exist in "right"
		# "file" and "file2" must be listed in both "left" and "right"
		grep sub output >sub-output &&
		test_line_count = 1 sub-output &&
		grep file"$" output >file-output &&
		test_line_count = 2 file-output &&
		grep file2 output >file2-output &&
		test_line_count = 2 file2-output
	)
'

run_dir_diff_test 'difftool --dir-diff v1 from subdirectory' '
	(
		cd sub &&
		git difftool --dir-diff $symlinks --extcmd ls v1 >output &&
		# "sub" and "file" exist in both v1 and HEAD.
		# "file2" is unchanged.
		grep sub output >sub-output &&
		test_line_count = 2 sub-output &&
		grep file output >file-output &&
		test_line_count = 2 file-output &&
		! grep file2 output
	)
'

run_dir_diff_test 'difftool --dir-diff branch from subdirectory w/ pathspec' '
	(
		cd sub &&
		git difftool --dir-diff $symlinks --extcmd ls branch -- .>output &&
		# "sub" only exists in "right"
		# "file" and "file2" must not be listed
		grep sub output >sub-output &&
		test_line_count = 1 sub-output &&
		! grep file output
	)
'

run_dir_diff_test 'difftool --dir-diff v1 from subdirectory w/ pathspec' '
	(
		cd sub &&
		git difftool --dir-diff $symlinks --extcmd ls v1 -- .>output &&
		# "sub" exists in v1 and HEAD
		# "file" is filtered out by the pathspec
		grep sub output >sub-output &&
		test_line_count = 2 sub-output &&
		! grep file output
	)
'

run_dir_diff_test 'difftool --dir-diff from subdirectory with GIT_DIR set' '
	(
		GIT_DIR=$(pwd)/.git &&
		export GIT_DIR &&
		GIT_WORK_TREE=$(pwd) &&
		export GIT_WORK_TREE &&
		cd sub &&
		git difftool --dir-diff $symlinks --extcmd ls \
			branch -- sub >output &&
		grep sub output &&
		! grep file output
	)
'

run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
	test_when_finished git reset --hard &&
	rm file2 &&
	git difftool --dir-diff $symlinks --extcmd ls branch master >output &&
	grep file2 output
'

run_dir_diff_test 'difftool --dir-diff with unmerged files' '
	test_when_finished git reset --hard &&
	test_config difftool.echo.cmd "echo ok" &&
	git checkout -B conflict-a &&
	git checkout -B conflict-b &&
	git checkout conflict-a &&
	echo a >>file &&
	git add file &&
	git commit -m conflict-a &&
	git checkout conflict-b &&
	echo b >>file &&
	git add file &&
	git commit -m conflict-b &&
	git checkout master &&
	git merge conflict-a &&
	test_must_fail git merge conflict-b &&
	cat >expect <<-EOF &&
		ok
	EOF
	git difftool --dir-diff $symlinks -t echo >actual &&
	test_cmp expect actual
'

write_script .git/CHECK_SYMLINKS <<\EOF
for f in file file2 sub/sub
do
	echo "$f"
	ls -ld "$2/$f" | sed -e 's/.* -> //'
done >actual
EOF

test_expect_success SYMLINKS 'difftool --dir-diff --symlinks without unstaged changes' '
	cat >expect <<-EOF &&
	file
	$PWD/file
	file2
	$PWD/file2
	sub/sub
	$PWD/sub/sub
	EOF
	git difftool --dir-diff --symlinks \
		--extcmd "./.git/CHECK_SYMLINKS" branch HEAD &&
	test_cmp expect actual
'

write_script modify-right-file <<\EOF
echo "new content" >"$2/file"
EOF

run_dir_diff_test 'difftool --dir-diff syncs worktree with unstaged change' '
	test_when_finished git reset --hard &&
	echo "orig content" >file &&
	git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
	echo "new content" >expect &&
	test_cmp expect file
'

run_dir_diff_test 'difftool --dir-diff syncs worktree without unstaged change' '
	test_when_finished git reset --hard &&
	git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
	echo "new content" >expect &&
	test_cmp expect file
'

write_script modify-file <<\EOF
echo "new content" >file
EOF

test_expect_success 'difftool --no-symlinks does not overwrite working tree file ' '
	echo "orig content" >file &&
	git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-file" branch &&
	echo "new content" >expect &&
	test_cmp expect file
'

write_script modify-both-files <<\EOF
echo "wt content" >file &&
echo "tmp content" >"$2/file" &&
echo "$2" >tmpdir
EOF

test_expect_success 'difftool --no-symlinks detects conflict ' '
	(
		TMPDIR=$TRASH_DIRECTORY &&
		export TMPDIR &&
		echo "orig content" >file &&
		test_must_fail git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-both-files" branch &&
		echo "wt content" >expect &&
		test_cmp expect file &&
		echo "tmp content" >expect &&
		test_cmp expect "$(cat tmpdir)/file"
	)
'

test_expect_success 'difftool properly honors gitlink and core.worktree' '
	test_when_finished rm -rf submod/ule &&
	git submodule add ./. submod/ule &&
	test_config -C submod/ule diff.tool checktrees &&
	test_config -C submod/ule difftool.checktrees.cmd '\''
		test -d "$LOCAL" && test -d "$REMOTE" && echo good
		'\'' &&
	(
		cd submod/ule &&
		echo good >expect &&
		git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
		test_cmp expect actual &&
		rm -f expect actual
	)
'

test_expect_success SYMLINKS 'difftool --dir-diff symlinked directories' '
	test_when_finished git reset --hard &&
	git init dirlinks &&
	(
		cd dirlinks &&
		git config diff.tool checktrees &&
		git config difftool.checktrees.cmd "echo good" &&
		mkdir foo &&
		: >foo/bar &&
		git add foo/bar &&
		test_commit symlink-one &&
		ln -s foo link &&
		git add link &&
		test_commit symlink-two &&
		echo good >expect &&
		git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
		test_cmp expect actual
	)
'

test_expect_success SYMLINKS 'difftool --dir-diff handles modified symlinks' '
	test_when_finished git reset --hard &&
	touch b &&
	ln -s b c &&
	git add b c &&
	test_tick &&
	git commit -m initial &&
	touch d &&
	rm c &&
	ln -s d c &&
	cat >expect <<-EOF &&
		b
		c

		c
	EOF
	git difftool --symlinks --dir-diff --extcmd ls >output &&
	grep -v ^/ output >actual &&
	test_cmp expect actual &&

	git difftool --no-symlinks --dir-diff --extcmd ls >output &&
	grep -v ^/ output >actual &&
	test_cmp expect actual &&

	# The left side contains symlink "c" that points to "b"
	test_config difftool.cat.cmd "cat \$LOCAL/c" &&
	printf "%s\n" b >expect &&

	git difftool --symlinks --dir-diff --tool cat >actual &&
	test_cmp expect actual &&

	git difftool --symlinks --no-symlinks --dir-diff --tool cat >actual &&
	test_cmp expect actual &&

	# The right side contains symlink "c" that points to "d"
	test_config difftool.cat.cmd "cat \$REMOTE/c" &&
	printf "%s\n" d >expect &&

	git difftool --symlinks --dir-diff --tool cat >actual &&
	test_cmp expect actual &&

	git difftool --no-symlinks --dir-diff --tool cat >actual &&
	test_cmp expect actual &&

	# Deleted symlinks
	rm -f c &&
	cat >expect <<-EOF &&
		b
		c

	EOF
	git difftool --symlinks --dir-diff --extcmd ls >output &&
	grep -v ^/ output >actual &&
	test_cmp expect actual &&

	git difftool --no-symlinks --dir-diff --extcmd ls >output &&
	grep -v ^/ output >actual &&
	test_cmp expect actual
'

test_expect_success 'outside worktree' '
	echo 1 >1 &&
	echo 2 >2 &&
	test_expect_code 1 nongit git \
		-c diff.tool=echo -c difftool.echo.cmd="echo \$LOCAL \$REMOTE" \
		difftool --no-prompt --no-index ../1 ../2 >actual &&
	echo "../1 ../2" >expect &&
	test_cmp expect actual
'

test_expect_success 'difftool --gui, --tool and --extcmd are mutually exclusive' '
	difftool_test_setup &&
	test_must_fail git difftool --gui --tool=test-tool &&
	test_must_fail git difftool --gui --extcmd=cat &&
	test_must_fail git difftool --tool=test-tool --extcmd=cat &&
	test_must_fail git difftool --gui --tool=test-tool --extcmd=cat
'

test_done