t/t7800-difftool.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2009, 2010, 2012, 2013 David Aguilar
   4 #
   5
   6 test_description='git-difftool
   7
   8 Testing basic diff tool invocation
   9 '
  10
  11 . ./test-lib.sh
  12
  13 difftool_test_setup ()
  14 {
  15         test_config diff.tool test-tool &&
  16         test_config difftool.test-tool.cmd 'cat "$LOCAL"' &&
  17         test_config difftool.bogus-tool.cmd false
  18 }
  19
  20 prompt_given ()
  21 {
  22         prompt="$1"
  23         test "$prompt" = "Launch 'test-tool' [Y/n]? branch"
  24 }
  25
  26 test_expect_success 'basic usage requires no repo' '
  27         test_expect_code 129 git difftool -h >output &&
  28         test_i18ngrep ^usage: output &&
  29         # create a ceiling directory to prevent Git from finding a repo
  30         mkdir -p not/repo &&
  31         test_when_finished rm -r not &&
  32         test_expect_code 129 \
  33         env GIT_CEILING_DIRECTORIES="$(pwd)/not" \
  34         git -C not/repo difftool -h >output &&
  35         test_i18ngrep ^usage: output
  36 '
  37
  38 # Create a file on master and change it on branch
  39 test_expect_success 'setup' '
  40         echo master >file &&
  41         git add file &&
  42         git commit -m "added file" &&
  43
  44         git checkout -b branch master &&
  45         echo branch >file &&
  46         git commit -a -m "branch changed file" &&
  47         git checkout master
  48 '
  49
  50 # Configure a custom difftool.<tool>.cmd and use it
  51 test_expect_success 'custom commands' '
  52         difftool_test_setup &&
  53         test_config difftool.test-tool.cmd "cat \"\$REMOTE\"" &&
  54         echo master >expect &&
  55         git difftool --no-prompt branch >actual &&
  56         test_cmp expect actual &&
  57
  58         test_config difftool.test-tool.cmd "cat \"\$LOCAL\"" &&
  59         echo branch >expect &&
  60         git difftool --no-prompt branch >actual &&
  61         test_cmp expect actual
  62 '
  63
  64 test_expect_success 'custom tool commands override built-ins' '
  65         test_config difftool.vimdiff.cmd "cat \"\$REMOTE\"" &&
  66         echo master >expect &&
  67         git difftool --tool vimdiff --no-prompt branch >actual &&
  68         test_cmp expect actual
  69 '
  70
  71 test_expect_success 'difftool ignores bad --tool values' '
  72         : >expect &&
  73         test_must_fail \
  74                 git difftool --no-prompt --tool=bad-tool branch >actual &&
  75         test_cmp expect actual
  76 '
  77
  78 test_expect_success 'difftool forwards arguments to diff' '
  79         difftool_test_setup &&
  80         >for-diff &&
  81         git add for-diff &&
  82         echo changes>for-diff &&
  83         git add for-diff &&
  84         : >expect &&
  85         git difftool --cached --no-prompt -- for-diff >actual &&
  86         test_cmp expect actual &&
  87         git reset -- for-diff &&
  88         rm for-diff
  89 '
  90
  91 test_expect_success 'difftool ignores exit code' '
  92         test_config difftool.error.cmd false &&
  93         git difftool -y -t error branch
  94 '
  95
  96 test_expect_success 'difftool forwards exit code with --trust-exit-code' '
  97         test_config difftool.error.cmd false &&
  98         test_must_fail git difftool -y --trust-exit-code -t error branch
  99 '
 100
 101 test_expect_success 'difftool forwards exit code with --trust-exit-code for built-ins' '
 102         test_config difftool.vimdiff.path false &&
 103         test_must_fail git difftool -y --trust-exit-code -t vimdiff branch
 104 '
 105
 106 test_expect_success 'difftool honors difftool.trustExitCode = true' '
 107         test_config difftool.error.cmd false &&
 108         test_config difftool.trustExitCode true &&
 109         test_must_fail git difftool -y -t error branch
 110 '
 111
 112 test_expect_success 'difftool honors difftool.trustExitCode = false' '
 113         test_config difftool.error.cmd false &&
 114         test_config difftool.trustExitCode false &&
 115         git difftool -y -t error branch
 116 '
 117
 118 test_expect_success 'difftool ignores exit code with --no-trust-exit-code' '
 119         test_config difftool.error.cmd false &&
 120         test_config difftool.trustExitCode true &&
 121         git difftool -y --no-trust-exit-code -t error branch
 122 '
 123
 124 test_expect_success 'difftool stops on error with --trust-exit-code' '
 125         test_when_finished "rm -f for-diff .git/fail-right-file" &&
 126         test_when_finished "git reset -- for-diff" &&
 127         write_script .git/fail-right-file <<-\EOF &&
 128         echo failed
 129         exit 1
 130         EOF
 131         >for-diff &&
 132         git add for-diff &&
 133         test_must_fail git difftool -y --trust-exit-code \
 134                 --extcmd .git/fail-right-file branch >actual &&
 135         test_line_count = 1 actual
 136 '
 137
 138 test_expect_success 'difftool honors exit status if command not found' '
 139         test_config difftool.nonexistent.cmd i-dont-exist &&
 140         test_config difftool.trustExitCode false &&
 141         test_must_fail git difftool -y -t nonexistent branch
 142 '
 143
 144 test_expect_success 'difftool honors --gui' '
 145         difftool_test_setup &&
 146         test_config merge.tool bogus-tool &&
 147         test_config diff.tool bogus-tool &&
 148         test_config diff.guitool test-tool &&
 149
 150         echo branch >expect &&
 151         git difftool --no-prompt --gui branch >actual &&
 152         test_cmp expect actual
 153 '
 154
 155 test_expect_success 'difftool --gui last setting wins' '
 156         difftool_test_setup &&
 157         : >expect &&
 158         git difftool --no-prompt --gui --no-gui >actual &&
 159         test_cmp expect actual &&
 160
 161         test_config merge.tool bogus-tool &&
 162         test_config diff.tool bogus-tool &&
 163         test_config diff.guitool test-tool &&
 164         echo branch >expect &&
 165         git difftool --no-prompt --no-gui --gui branch >actual &&
 166         test_cmp expect actual
 167 '
 168
 169 test_expect_success 'difftool --gui works without configured diff.guitool' '
 170         difftool_test_setup &&
 171         echo branch >expect &&
 172         git difftool --no-prompt --gui branch >actual &&
 173         test_cmp expect actual
 174 '
 175
 176 # Specify the diff tool using $GIT_DIFF_TOOL
 177 test_expect_success 'GIT_DIFF_TOOL variable' '
 178         difftool_test_setup &&
 179         git config --unset diff.tool &&
 180         echo branch >expect &&
 181         GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
 182         test_cmp expect actual
 183 '
 184
 185 # Test the $GIT_*_TOOL variables and ensure
 186 # that $GIT_DIFF_TOOL always wins unless --tool is specified
 187 test_expect_success 'GIT_DIFF_TOOL overrides' '
 188         difftool_test_setup &&
 189         test_config diff.tool bogus-tool &&
 190         test_config merge.tool bogus-tool &&
 191
 192         echo branch >expect &&
 193         GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
 194         test_cmp expect actual &&
 195
 196         test_config diff.tool bogus-tool &&
 197         test_config merge.tool bogus-tool &&
 198         GIT_DIFF_TOOL=bogus-tool \
 199                 git difftool --no-prompt --tool=test-tool branch >actual &&
 200         test_cmp expect actual
 201 '
 202
 203 # Test that we don't have to pass --no-prompt to difftool
 204 # when $GIT_DIFFTOOL_NO_PROMPT is true
 205 test_expect_success 'GIT_DIFFTOOL_NO_PROMPT variable' '
 206         difftool_test_setup &&
 207         echo branch >expect &&
 208         GIT_DIFFTOOL_NO_PROMPT=true git difftool branch >actual &&
 209         test_cmp expect actual
 210 '
 211
 212 # git-difftool supports the difftool.prompt variable.
 213 # Test that GIT_DIFFTOOL_PROMPT can override difftool.prompt = false
 214 test_expect_success 'GIT_DIFFTOOL_PROMPT variable' '
 215         difftool_test_setup &&
 216         test_config difftool.prompt false &&
 217         echo >input &&
 218         GIT_DIFFTOOL_PROMPT=true git difftool branch <input >output &&
 219         prompt=$(tail -1 <output) &&
 220         prompt_given "$prompt"
 221 '
 222
 223 # Test that we don't have to pass --no-prompt when difftool.prompt is false
 224 test_expect_success 'difftool.prompt config variable is false' '
 225         difftool_test_setup &&
 226         test_config difftool.prompt false &&
 227         echo branch >expect &&
 228         git difftool branch >actual &&
 229         test_cmp expect actual
 230 '
 231
 232 # Test that we don't have to pass --no-prompt when mergetool.prompt is false
 233 test_expect_success 'difftool merge.prompt = false' '
 234         difftool_test_setup &&
 235         test_might_fail git config --unset difftool.prompt &&
 236         test_config mergetool.prompt false &&
 237         echo branch >expect &&
 238         git difftool branch >actual &&
 239         test_cmp expect actual
 240 '
 241
 242 # Test that the -y flag can override difftool.prompt = true
 243 test_expect_success 'difftool.prompt can overridden with -y' '
 244         difftool_test_setup &&
 245         test_config difftool.prompt true &&
 246         echo branch >expect &&
 247         git difftool -y branch >actual &&
 248         test_cmp expect actual
 249 '
 250
 251 # Test that the --prompt flag can override difftool.prompt = false
 252 test_expect_success 'difftool.prompt can overridden with --prompt' '
 253         difftool_test_setup &&
 254         test_config difftool.prompt false &&
 255         echo >input &&
 256         git difftool --prompt branch <input >output &&
 257         prompt=$(tail -1 <output) &&
 258         prompt_given "$prompt"
 259 '
 260
 261 # Test that the last flag passed on the command-line wins
 262 test_expect_success 'difftool last flag wins' '
 263         difftool_test_setup &&
 264         echo branch >expect &&
 265         git difftool --prompt --no-prompt branch >actual &&
 266         test_cmp expect actual &&
 267         echo >input &&
 268         git difftool --no-prompt --prompt branch <input >output &&
 269         prompt=$(tail -1 <output) &&
 270         prompt_given "$prompt"
 271 '
 272
 273 # git-difftool falls back to git-mergetool config variables
 274 # so test that behavior here
 275 test_expect_success 'difftool + mergetool config variables' '
 276         test_config merge.tool test-tool &&
 277         test_config mergetool.test-tool.cmd "cat \$LOCAL" &&
 278         echo branch >expect &&
 279         git difftool --no-prompt branch >actual &&
 280         test_cmp expect actual &&
 281         git difftool --gui --no-prompt branch >actual &&
 282         test_cmp expect actual &&
 283
 284         # set merge.tool to something bogus, diff.tool to test-tool
 285         test_config merge.tool bogus-tool &&
 286         test_config diff.tool test-tool &&
 287         git difftool --no-prompt branch >actual &&
 288         test_cmp expect actual &&
 289         git difftool --gui --no-prompt branch >actual &&
 290         test_cmp expect actual &&
 291
 292         # set merge.tool, diff.tool to something bogus, merge.guitool to test-tool
 293         test_config diff.tool bogus-tool &&
 294         test_config merge.guitool test-tool &&
 295         git difftool --gui --no-prompt branch >actual &&
 296         test_cmp expect actual &&
 297
 298         # set merge.tool, diff.tool, merge.guitool to something bogus, diff.guitool to test-tool
 299         test_config merge.guitool bogus-tool &&
 300         test_config diff.guitool test-tool &&
 301         git difftool --gui --no-prompt branch >actual &&
 302         test_cmp expect actual
 303 '
 304
 305 test_expect_success 'difftool.<tool>.path' '
 306         test_config difftool.tkdiff.path echo &&
 307         git difftool --tool=tkdiff --no-prompt branch >output &&
 308         grep file output >grep-output &&
 309         test_line_count = 1 grep-output
 310 '
 311
 312 test_expect_success 'difftool --extcmd=cat' '
 313         echo branch >expect &&
 314         echo master >>expect &&
 315         git difftool --no-prompt --extcmd=cat branch >actual &&
 316         test_cmp expect actual
 317 '
 318
 319 test_expect_success 'difftool --extcmd cat' '
 320         echo branch >expect &&
 321         echo master >>expect &&
 322         git difftool --no-prompt --extcmd=cat branch >actual &&
 323         test_cmp expect actual
 324 '
 325
 326 test_expect_success 'difftool -x cat' '
 327         echo branch >expect &&
 328         echo master >>expect &&
 329         git difftool --no-prompt -x cat branch >actual &&
 330         test_cmp expect actual
 331 '
 332
 333 test_expect_success 'difftool --extcmd echo arg1' '
 334         echo file >expect &&
 335         git difftool --no-prompt \
 336                 --extcmd sh\ -c\ \"echo\ \$1\" branch >actual &&
 337         test_cmp expect actual
 338 '
 339
 340 test_expect_success 'difftool --extcmd cat arg1' '
 341         echo master >expect &&
 342         git difftool --no-prompt \
 343                 --extcmd sh\ -c\ \"cat\ \$1\" branch >actual &&
 344         test_cmp expect actual
 345 '
 346
 347 test_expect_success 'difftool --extcmd cat arg2' '
 348         echo branch >expect &&
 349         git difftool --no-prompt \
 350                 --extcmd sh\ -c\ \"cat\ \\\"\$2\\\"\" branch >actual &&
 351         test_cmp expect actual
 352 '
 353
 354 # Create a second file on master and a different version on branch
 355 test_expect_success 'setup with 2 files different' '
 356         echo m2 >file2 &&
 357         git add file2 &&
 358         git commit -m "added file2" &&
 359
 360         git checkout branch &&
 361         echo br2 >file2 &&
 362         git add file2 &&
 363         git commit -a -m "branch changed file2" &&
 364         git checkout master
 365 '
 366
 367 test_expect_success 'say no to the first file' '
 368         (echo n && echo) >input &&
 369         git difftool -x cat branch <input >output &&
 370         grep m2 output &&
 371         grep br2 output &&
 372         ! grep master output &&
 373         ! grep branch output
 374 '
 375
 376 test_expect_success 'say no to the second file' '
 377         (echo && echo n) >input &&
 378         git difftool -x cat branch <input >output &&
 379         grep master output &&
 380         grep branch output &&
 381         ! grep m2 output &&
 382         ! grep br2 output
 383 '
 384
 385 test_expect_success 'ending prompt input with EOF' '
 386         git difftool -x cat branch </dev/null >output &&
 387         ! grep master output &&
 388         ! grep branch output &&
 389         ! grep m2 output &&
 390         ! grep br2 output
 391 '
 392
 393 test_expect_success 'difftool --tool-help' '
 394         git difftool --tool-help >output &&
 395         grep tool output
 396 '
 397
 398 test_expect_success 'setup change in subdirectory' '
 399         git checkout master &&
 400         mkdir sub &&
 401         echo master >sub/sub &&
 402         git add sub/sub &&
 403         git commit -m "added sub/sub" &&
 404         git tag v1 &&
 405         echo test >>file &&
 406         echo test >>sub/sub &&
 407         git add file sub/sub &&
 408         git commit -m "modified both"
 409 '
 410
 411 test_expect_success 'difftool -d with growing paths' '
 412         a=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&
 413         git init growing &&
 414         (
 415                 cd growing &&
 416                 echo "test -f \"\$2/b\"" | write_script .git/test-for-b.sh &&
 417                 one=$(printf 1 | git hash-object -w --stdin) &&
 418                 two=$(printf 2 | git hash-object -w --stdin) &&
 419                 git update-index --add \
 420                         --cacheinfo 100644,$one,$a --cacheinfo 100644,$two,b &&
 421                 tree1=$(git write-tree) &&
 422                 git update-index --add \
 423                         --cacheinfo 100644,$two,$a --cacheinfo 100644,$one,b &&
 424                 tree2=$(git write-tree) &&
 425                 git checkout -- $a &&
 426                 git difftool -d --extcmd .git/test-for-b.sh $tree1 $tree2
 427         )
 428 '
 429
 430 run_dir_diff_test () {
 431         test_expect_success "$1 --no-symlinks" "
 432                 symlinks=--no-symlinks &&
 433                 $2
 434         "
 435         test_expect_success SYMLINKS "$1 --symlinks" "
 436                 symlinks=--symlinks &&
 437                 $2
 438         "
 439 }
 440
 441 run_dir_diff_test 'difftool -d' '
 442         git difftool -d $symlinks --extcmd ls branch >output &&
 443         grep sub output &&
 444         grep file output
 445 '
 446
 447 run_dir_diff_test 'difftool --dir-diff' '
 448         git difftool --dir-diff $symlinks --extcmd ls branch >output &&
 449         grep sub output &&
 450         grep file output
 451 '
 452
 453 run_dir_diff_test 'difftool --dir-diff ignores --prompt' '
 454         git difftool --dir-diff $symlinks --prompt --extcmd ls branch >output &&
 455         grep sub output &&
 456         grep file output
 457 '
 458
 459 run_dir_diff_test 'difftool --dir-diff branch from subdirectory' '
 460         (
 461                 cd sub &&
 462                 git difftool --dir-diff $symlinks --extcmd ls branch >output &&
 463                 # "sub" must only exist in "right"
 464                 # "file" and "file2" must be listed in both "left" and "right"
 465                 grep sub output >sub-output &&
 466                 test_line_count = 1 sub-output &&
 467                 grep file"$" output >file-output &&
 468                 test_line_count = 2 file-output &&
 469                 grep file2 output >file2-output &&
 470                 test_line_count = 2 file2-output
 471         )
 472 '
 473
 474 run_dir_diff_test 'difftool --dir-diff v1 from subdirectory' '
 475         (
 476                 cd sub &&
 477                 git difftool --dir-diff $symlinks --extcmd ls v1 >output &&
 478                 # "sub" and "file" exist in both v1 and HEAD.
 479                 # "file2" is unchanged.
 480                 grep sub output >sub-output &&
 481                 test_line_count = 2 sub-output &&
 482                 grep file output >file-output &&
 483                 test_line_count = 2 file-output &&
 484                 ! grep file2 output
 485         )
 486 '
 487
 488 run_dir_diff_test 'difftool --dir-diff branch from subdirectory w/ pathspec' '
 489         (
 490                 cd sub &&
 491                 git difftool --dir-diff $symlinks --extcmd ls branch -- .>output &&
 492                 # "sub" only exists in "right"
 493                 # "file" and "file2" must not be listed
 494                 grep sub output >sub-output &&
 495                 test_line_count = 1 sub-output &&
 496                 ! grep file output
 497         )
 498 '
 499
 500 run_dir_diff_test 'difftool --dir-diff v1 from subdirectory w/ pathspec' '
 501         (
 502                 cd sub &&
 503                 git difftool --dir-diff $symlinks --extcmd ls v1 -- .>output &&
 504                 # "sub" exists in v1 and HEAD
 505                 # "file" is filtered out by the pathspec
 506                 grep sub output >sub-output &&
 507                 test_line_count = 2 sub-output &&
 508                 ! grep file output
 509         )
 510 '
 511
 512 run_dir_diff_test 'difftool --dir-diff from subdirectory with GIT_DIR set' '
 513         (
 514                 GIT_DIR=$(pwd)/.git &&
 515                 export GIT_DIR &&
 516                 GIT_WORK_TREE=$(pwd) &&
 517                 export GIT_WORK_TREE &&
 518                 cd sub &&
 519                 git difftool --dir-diff $symlinks --extcmd ls \
 520                         branch -- sub >output &&
 521                 grep sub output &&
 522                 ! grep file output
 523         )
 524 '
 525
 526 run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
 527         test_when_finished git reset --hard &&
 528         rm file2 &&
 529         git difftool --dir-diff $symlinks --extcmd ls branch master >output &&
 530         grep file2 output
 531 '
 532
 533 run_dir_diff_test 'difftool --dir-diff with unmerged files' '
 534         test_when_finished git reset --hard &&
 535         test_config difftool.echo.cmd "echo ok" &&
 536         git checkout -B conflict-a &&
 537         git checkout -B conflict-b &&
 538         git checkout conflict-a &&
 539         echo a >>file &&
 540         git add file &&
 541         git commit -m conflict-a &&
 542         git checkout conflict-b &&
 543         echo b >>file &&
 544         git add file &&
 545         git commit -m conflict-b &&
 546         git checkout master &&
 547         git merge conflict-a &&
 548         test_must_fail git merge conflict-b &&
 549         cat >expect <<-EOF &&
 550                 ok
 551         EOF
 552         git difftool --dir-diff $symlinks -t echo >actual &&
 553         test_cmp expect actual
 554 '
 555
 556 write_script .git/CHECK_SYMLINKS <<\EOF
 557 for f in file file2 sub/sub
 558 do
 559         echo "$f"
 560         ls -ld "$2/$f" | sed -e 's/.* -> //'
 561 done >actual
 562 EOF
 563
 564 test_expect_success SYMLINKS 'difftool --dir-diff --symlinks without unstaged changes' '
 565         cat >expect <<-EOF &&
 566         file
 567         $PWD/file
 568         file2
 569         $PWD/file2
 570         sub/sub
 571         $PWD/sub/sub
 572         EOF
 573         git difftool --dir-diff --symlinks \
 574                 --extcmd "./.git/CHECK_SYMLINKS" branch HEAD &&
 575         test_cmp expect actual
 576 '
 577
 578 write_script modify-right-file <<\EOF
 579 echo "new content" >"$2/file"
 580 EOF
 581
 582 run_dir_diff_test 'difftool --dir-diff syncs worktree with unstaged change' '
 583         test_when_finished git reset --hard &&
 584         echo "orig content" >file &&
 585         git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
 586         echo "new content" >expect &&
 587         test_cmp expect file
 588 '
 589
 590 run_dir_diff_test 'difftool --dir-diff syncs worktree without unstaged change' '
 591         test_when_finished git reset --hard &&
 592         git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
 593         echo "new content" >expect &&
 594         test_cmp expect file
 595 '
 596
 597 write_script modify-file <<\EOF
 598 echo "new content" >file
 599 EOF
 600
 601 test_expect_success 'difftool --no-symlinks does not overwrite working tree file ' '
 602         echo "orig content" >file &&
 603         git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-file" branch &&
 604         echo "new content" >expect &&
 605         test_cmp expect file
 606 '
 607
 608 write_script modify-both-files <<\EOF
 609 echo "wt content" >file &&
 610 echo "tmp content" >"$2/file" &&
 611 echo "$2" >tmpdir
 612 EOF
 613
 614 test_expect_success 'difftool --no-symlinks detects conflict ' '
 615         (
 616                 TMPDIR=$TRASH_DIRECTORY &&
 617                 export TMPDIR &&
 618                 echo "orig content" >file &&
 619                 test_must_fail git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-both-files" branch &&
 620                 echo "wt content" >expect &&
 621                 test_cmp expect file &&
 622                 echo "tmp content" >expect &&
 623                 test_cmp expect "$(cat tmpdir)/file"
 624         )
 625 '
 626
 627 test_expect_success 'difftool properly honors gitlink and core.worktree' '
 628         test_when_finished rm -rf submod/ule &&
 629         git submodule add ./. submod/ule &&
 630         test_config -C submod/ule diff.tool checktrees &&
 631         test_config -C submod/ule difftool.checktrees.cmd '\''
 632                 test -d "$LOCAL" && test -d "$REMOTE" && echo good
 633                 '\'' &&
 634         (
 635                 cd submod/ule &&
 636                 echo good >expect &&
 637                 git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
 638                 test_cmp expect actual &&
 639                 rm -f expect actual
 640         )
 641 '
 642
 643 test_expect_success SYMLINKS 'difftool --dir-diff symlinked directories' '
 644         test_when_finished git reset --hard &&
 645         git init dirlinks &&
 646         (
 647                 cd dirlinks &&
 648                 git config diff.tool checktrees &&
 649                 git config difftool.checktrees.cmd "echo good" &&
 650                 mkdir foo &&
 651                 : >foo/bar &&
 652                 git add foo/bar &&
 653                 test_commit symlink-one &&
 654                 ln -s foo link &&
 655                 git add link &&
 656                 test_commit symlink-two &&
 657                 echo good >expect &&
 658                 git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
 659                 test_cmp expect actual
 660         )
 661 '
 662
 663 test_expect_success SYMLINKS 'difftool --dir-diff handles modified symlinks' '
 664         test_when_finished git reset --hard &&
 665         touch b &&
 666         ln -s b c &&
 667         git add b c &&
 668         test_tick &&
 669         git commit -m initial &&
 670         touch d &&
 671         rm c &&
 672         ln -s d c &&
 673         cat >expect <<-EOF &&
 674                 b
 675                 c
 676
 677                 c
 678         EOF
 679         git difftool --symlinks --dir-diff --extcmd ls >output &&
 680         grep -v ^/ output >actual &&
 681         test_cmp expect actual &&
 682
 683         git difftool --no-symlinks --dir-diff --extcmd ls >output &&
 684         grep -v ^/ output >actual &&
 685         test_cmp expect actual &&
 686
 687         # The left side contains symlink "c" that points to "b"
 688         test_config difftool.cat.cmd "cat \$LOCAL/c" &&
 689         printf "%s\n" b >expect &&
 690
 691         git difftool --symlinks --dir-diff --tool cat >actual &&
 692         test_cmp expect actual &&
 693
 694         git difftool --symlinks --no-symlinks --dir-diff --tool cat >actual &&
 695         test_cmp expect actual &&
 696
 697         # The right side contains symlink "c" that points to "d"
 698         test_config difftool.cat.cmd "cat \$REMOTE/c" &&
 699         printf "%s\n" d >expect &&
 700
 701         git difftool --symlinks --dir-diff --tool cat >actual &&
 702         test_cmp expect actual &&
 703
 704         git difftool --no-symlinks --dir-diff --tool cat >actual &&
 705         test_cmp expect actual &&
 706
 707         # Deleted symlinks
 708         rm -f c &&
 709         cat >expect <<-EOF &&
 710                 b
 711                 c
 712
 713         EOF
 714         git difftool --symlinks --dir-diff --extcmd ls >output &&
 715         grep -v ^/ output >actual &&
 716         test_cmp expect actual &&
 717
 718         git difftool --no-symlinks --dir-diff --extcmd ls >output &&
 719         grep -v ^/ output >actual &&
 720         test_cmp expect actual
 721 '
 722
 723 test_expect_success 'outside worktree' '
 724         echo 1 >1 &&
 725         echo 2 >2 &&
 726         test_expect_code 1 nongit git \
 727                 -c diff.tool=echo -c difftool.echo.cmd="echo \$LOCAL \$REMOTE" \
 728                 difftool --no-prompt --no-index ../1 ../2 >actual &&
 729         echo "../1 ../2" >expect &&
 730         test_cmp expect actual
 731 '
 732
 733 test_expect_success 'difftool --gui, --tool and --extcmd are mutually exclusive' '
 734         difftool_test_setup &&
 735         test_must_fail git difftool --gui --tool=test-tool &&
 736         test_must_fail git difftool --gui --extcmd=cat &&
 737         test_must_fail git difftool --tool=test-tool --extcmd=cat &&
 738         test_must_fail git difftool --gui --tool=test-tool --extcmd=cat
 739 '
 740
 741 test_done