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 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  12 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  13
  14 . ./test-lib.sh
  15
  16 difftool_test_setup ()
  17 {
  18         test_config diff.tool test-tool &&
  19         test_config difftool.test-tool.cmd 'cat "$LOCAL"' &&
  20         test_config difftool.bogus-tool.cmd false
  21 }
  22
  23 prompt_given ()
  24 {
  25         prompt="$1"
  26         test "$prompt" = "Launch 'test-tool' [Y/n]? branch"
  27 }
  28
  29 test_expect_success 'basic usage requires no repo' '
  30         test_expect_code 129 git difftool -h >output &&
  31         test_i18ngrep ^usage: output &&
  32         # create a ceiling directory to prevent Git from finding a repo
  33         mkdir -p not/repo &&
  34         test_when_finished rm -r not &&
  35         test_expect_code 129 \
  36         env GIT_CEILING_DIRECTORIES="$(pwd)/not" \
  37         git -C not/repo difftool -h >output &&
  38         test_i18ngrep ^usage: output
  39 '
  40
  41 # Create a file on main and change it on branch
  42 test_expect_success 'setup' '
  43         echo main >file &&
  44         git add file &&
  45         git commit -m "added file" &&
  46
  47         git checkout -b branch main &&
  48         echo branch >file &&
  49         git commit -a -m "branch changed file" &&
  50         git checkout main
  51 '
  52
  53 # Configure a custom difftool.<tool>.cmd and use it
  54 test_expect_success 'custom commands' '
  55         difftool_test_setup &&
  56         test_config difftool.test-tool.cmd "cat \"\$REMOTE\"" &&
  57         echo main >expect &&
  58         git difftool --no-prompt branch >actual &&
  59         test_cmp expect actual &&
  60
  61         test_config difftool.test-tool.cmd "cat \"\$LOCAL\"" &&
  62         echo branch >expect &&
  63         git difftool --no-prompt branch >actual &&
  64         test_cmp expect actual
  65 '
  66
  67 test_expect_success 'custom tool commands override built-ins' '
  68         test_config difftool.vimdiff.cmd "cat \"\$REMOTE\"" &&
  69         echo main >expect &&
  70         git difftool --tool vimdiff --no-prompt branch >actual &&
  71         test_cmp expect actual
  72 '
  73
  74 test_expect_success 'difftool ignores bad --tool values' '
  75         : >expect &&
  76         test_must_fail \
  77                 git difftool --no-prompt --tool=bad-tool branch >actual &&
  78         test_cmp expect actual
  79 '
  80
  81 test_expect_success 'difftool forwards arguments to diff' '
  82         difftool_test_setup &&
  83         >for-diff &&
  84         git add for-diff &&
  85         echo changes>for-diff &&
  86         git add for-diff &&
  87         : >expect &&
  88         git difftool --cached --no-prompt -- for-diff >actual &&
  89         test_cmp expect actual &&
  90         git reset -- for-diff &&
  91         rm for-diff
  92 '
  93
  94 test_expect_success 'difftool ignores exit code' '
  95         test_config difftool.error.cmd false &&
  96         git difftool -y -t error branch
  97 '
  98
  99 test_expect_success 'difftool forwards exit code with --trust-exit-code' '
 100         test_config difftool.error.cmd false &&
 101         test_must_fail git difftool -y --trust-exit-code -t error branch
 102 '
 103
 104 test_expect_success 'difftool forwards exit code with --trust-exit-code for built-ins' '
 105         test_config difftool.vimdiff.path false &&
 106         test_must_fail git difftool -y --trust-exit-code -t vimdiff branch
 107 '
 108
 109 test_expect_success 'difftool honors difftool.trustExitCode = true' '
 110         test_config difftool.error.cmd false &&
 111         test_config difftool.trustExitCode true &&
 112         test_must_fail git difftool -y -t error branch
 113 '
 114
 115 test_expect_success 'difftool honors difftool.trustExitCode = false' '
 116         test_config difftool.error.cmd false &&
 117         test_config difftool.trustExitCode false &&
 118         git difftool -y -t error branch
 119 '
 120
 121 test_expect_success 'difftool ignores exit code with --no-trust-exit-code' '
 122         test_config difftool.error.cmd false &&
 123         test_config difftool.trustExitCode true &&
 124         git difftool -y --no-trust-exit-code -t error branch
 125 '
 126
 127 test_expect_success 'difftool stops on error with --trust-exit-code' '
 128         test_when_finished "rm -f for-diff .git/fail-right-file" &&
 129         test_when_finished "git reset -- for-diff" &&
 130         write_script .git/fail-right-file <<-\EOF &&
 131         echo failed
 132         exit 1
 133         EOF
 134         >for-diff &&
 135         git add for-diff &&
 136         test_must_fail git difftool -y --trust-exit-code \
 137                 --extcmd .git/fail-right-file branch >actual &&
 138         test_line_count = 1 actual
 139 '
 140
 141 test_expect_success 'difftool honors exit status if command not found' '
 142         test_config difftool.nonexistent.cmd i-dont-exist &&
 143         test_config difftool.trustExitCode false &&
 144         test_must_fail git difftool -y -t nonexistent branch
 145 '
 146
 147 test_expect_success 'difftool honors --gui' '
 148         difftool_test_setup &&
 149         test_config merge.tool bogus-tool &&
 150         test_config diff.tool bogus-tool &&
 151         test_config diff.guitool test-tool &&
 152
 153         echo branch >expect &&
 154         git difftool --no-prompt --gui branch >actual &&
 155         test_cmp expect actual
 156 '
 157
 158 test_expect_success 'difftool --gui last setting wins' '
 159         difftool_test_setup &&
 160         : >expect &&
 161         git difftool --no-prompt --gui --no-gui >actual &&
 162         test_cmp expect actual &&
 163
 164         test_config merge.tool bogus-tool &&
 165         test_config diff.tool bogus-tool &&
 166         test_config diff.guitool test-tool &&
 167         echo branch >expect &&
 168         git difftool --no-prompt --no-gui --gui branch >actual &&
 169         test_cmp expect actual
 170 '
 171
 172 test_expect_success 'difftool --gui works without configured diff.guitool' '
 173         difftool_test_setup &&
 174         echo branch >expect &&
 175         git difftool --no-prompt --gui branch >actual &&
 176         test_cmp expect actual
 177 '
 178
 179 # Specify the diff tool using $GIT_DIFF_TOOL
 180 test_expect_success 'GIT_DIFF_TOOL variable' '
 181         difftool_test_setup &&
 182         git config --unset diff.tool &&
 183         echo branch >expect &&
 184         GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
 185         test_cmp expect actual
 186 '
 187
 188 # Test the $GIT_*_TOOL variables and ensure
 189 # that $GIT_DIFF_TOOL always wins unless --tool is specified
 190 test_expect_success 'GIT_DIFF_TOOL overrides' '
 191         difftool_test_setup &&
 192         test_config diff.tool bogus-tool &&
 193         test_config merge.tool bogus-tool &&
 194
 195         echo branch >expect &&
 196         GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
 197         test_cmp expect actual &&
 198
 199         test_config diff.tool bogus-tool &&
 200         test_config merge.tool bogus-tool &&
 201         GIT_DIFF_TOOL=bogus-tool \
 202                 git difftool --no-prompt --tool=test-tool branch >actual &&
 203         test_cmp expect actual
 204 '
 205
 206 # Test that we don't have to pass --no-prompt to difftool
 207 # when $GIT_DIFFTOOL_NO_PROMPT is true
 208 test_expect_success 'GIT_DIFFTOOL_NO_PROMPT variable' '
 209         difftool_test_setup &&
 210         echo branch >expect &&
 211         GIT_DIFFTOOL_NO_PROMPT=true git difftool branch >actual &&
 212         test_cmp expect actual
 213 '
 214
 215 # git-difftool supports the difftool.prompt variable.
 216 # Test that GIT_DIFFTOOL_PROMPT can override difftool.prompt = false
 217 test_expect_success 'GIT_DIFFTOOL_PROMPT variable' '
 218         difftool_test_setup &&
 219         test_config difftool.prompt false &&
 220         echo >input &&
 221         GIT_DIFFTOOL_PROMPT=true git difftool branch <input >output &&
 222         prompt=$(tail -1 <output) &&
 223         prompt_given "$prompt"
 224 '
 225
 226 # Test that we don't have to pass --no-prompt when difftool.prompt is false
 227 test_expect_success 'difftool.prompt config variable is false' '
 228         difftool_test_setup &&
 229         test_config difftool.prompt false &&
 230         echo branch >expect &&
 231         git difftool branch >actual &&
 232         test_cmp expect actual
 233 '
 234
 235 # Test that we don't have to pass --no-prompt when mergetool.prompt is false
 236 test_expect_success 'difftool merge.prompt = false' '
 237         difftool_test_setup &&
 238         test_might_fail git config --unset difftool.prompt &&
 239         test_config mergetool.prompt false &&
 240         echo branch >expect &&
 241         git difftool branch >actual &&
 242         test_cmp expect actual
 243 '
 244
 245 # Test that the -y flag can override difftool.prompt = true
 246 test_expect_success 'difftool.prompt can overridden with -y' '
 247         difftool_test_setup &&
 248         test_config difftool.prompt true &&
 249         echo branch >expect &&
 250         git difftool -y branch >actual &&
 251         test_cmp expect actual
 252 '
 253
 254 # Test that the --prompt flag can override difftool.prompt = false
 255 test_expect_success 'difftool.prompt can overridden with --prompt' '
 256         difftool_test_setup &&
 257         test_config difftool.prompt false &&
 258         echo >input &&
 259         git difftool --prompt branch <input >output &&
 260         prompt=$(tail -1 <output) &&
 261         prompt_given "$prompt"
 262 '
 263
 264 # Test that the last flag passed on the command-line wins
 265 test_expect_success 'difftool last flag wins' '
 266         difftool_test_setup &&
 267         echo branch >expect &&
 268         git difftool --prompt --no-prompt branch >actual &&
 269         test_cmp expect actual &&
 270         echo >input &&
 271         git difftool --no-prompt --prompt branch <input >output &&
 272         prompt=$(tail -1 <output) &&
 273         prompt_given "$prompt"
 274 '
 275
 276 # git-difftool falls back to git-mergetool config variables
 277 # so test that behavior here
 278 test_expect_success 'difftool + mergetool config variables' '
 279         test_config merge.tool test-tool &&
 280         test_config mergetool.test-tool.cmd "cat \$LOCAL" &&
 281         echo branch >expect &&
 282         git difftool --no-prompt branch >actual &&
 283         test_cmp expect actual &&
 284         git difftool --gui --no-prompt branch >actual &&
 285         test_cmp expect actual &&
 286
 287         # set merge.tool to something bogus, diff.tool to test-tool
 288         test_config merge.tool bogus-tool &&
 289         test_config diff.tool test-tool &&
 290         git difftool --no-prompt branch >actual &&
 291         test_cmp expect actual &&
 292         git difftool --gui --no-prompt branch >actual &&
 293         test_cmp expect actual &&
 294
 295         # set merge.tool, diff.tool to something bogus, merge.guitool to test-tool
 296         test_config diff.tool bogus-tool &&
 297         test_config merge.guitool test-tool &&
 298         git difftool --gui --no-prompt branch >actual &&
 299         test_cmp expect actual &&
 300
 301         # set merge.tool, diff.tool, merge.guitool to something bogus, diff.guitool to test-tool
 302         test_config merge.guitool bogus-tool &&
 303         test_config diff.guitool test-tool &&
 304         git difftool --gui --no-prompt branch >actual &&
 305         test_cmp expect actual
 306 '
 307
 308 test_expect_success 'difftool.<tool>.path' '
 309         test_config difftool.tkdiff.path echo &&
 310         git difftool --tool=tkdiff --no-prompt branch >output &&
 311         grep file output >grep-output &&
 312         test_line_count = 1 grep-output
 313 '
 314
 315 test_expect_success 'difftool --extcmd=cat' '
 316         echo branch >expect &&
 317         echo main >>expect &&
 318         git difftool --no-prompt --extcmd=cat branch >actual &&
 319         test_cmp expect actual
 320 '
 321
 322 test_expect_success 'difftool --extcmd cat' '
 323         echo branch >expect &&
 324         echo main >>expect &&
 325         git difftool --no-prompt --extcmd=cat branch >actual &&
 326         test_cmp expect actual
 327 '
 328
 329 test_expect_success 'difftool -x cat' '
 330         echo branch >expect &&
 331         echo main >>expect &&
 332         git difftool --no-prompt -x cat branch >actual &&
 333         test_cmp expect actual
 334 '
 335
 336 test_expect_success 'difftool --extcmd echo arg1' '
 337         echo file >expect &&
 338         git difftool --no-prompt \
 339                 --extcmd sh\ -c\ \"echo\ \$1\" branch >actual &&
 340         test_cmp expect actual
 341 '
 342
 343 test_expect_success 'difftool --extcmd cat arg1' '
 344         echo main >expect &&
 345         git difftool --no-prompt \
 346                 --extcmd sh\ -c\ \"cat\ \$1\" branch >actual &&
 347         test_cmp expect actual
 348 '
 349
 350 test_expect_success 'difftool --extcmd cat arg2' '
 351         echo branch >expect &&
 352         git difftool --no-prompt \
 353                 --extcmd sh\ -c\ \"cat\ \\\"\$2\\\"\" branch >actual &&
 354         test_cmp expect actual
 355 '
 356
 357 # Create a second file on main and a different version on branch
 358 test_expect_success 'setup with 2 files different' '
 359         echo m2 >file2 &&
 360         git add file2 &&
 361         git commit -m "added file2" &&
 362
 363         git checkout branch &&
 364         echo br2 >file2 &&
 365         git add file2 &&
 366         git commit -a -m "branch changed file2" &&
 367         git checkout main
 368 '
 369
 370 test_expect_success 'say no to the first file' '
 371         (echo n && echo) >input &&
 372         git difftool -x cat branch <input >output &&
 373         grep m2 output &&
 374         grep br2 output &&
 375         ! grep main output &&
 376         ! grep branch output
 377 '
 378
 379 test_expect_success 'say no to the second file' '
 380         (echo && echo n) >input &&
 381         git difftool -x cat branch <input >output &&
 382         grep main output &&
 383         grep branch output &&
 384         ! grep m2 output &&
 385         ! grep br2 output
 386 '
 387
 388 test_expect_success 'ending prompt input with EOF' '
 389         git difftool -x cat branch </dev/null >output &&
 390         ! grep main output &&
 391         ! grep branch output &&
 392         ! grep m2 output &&
 393         ! grep br2 output
 394 '
 395
 396 test_expect_success 'difftool --tool-help' '
 397         git difftool --tool-help >output &&
 398         grep tool output
 399 '
 400
 401 test_expect_success 'setup change in subdirectory' '
 402         git checkout main &&
 403         mkdir sub &&
 404         echo main >sub/sub &&
 405         git add sub/sub &&
 406         git commit -m "added sub/sub" &&
 407         git tag v1 &&
 408         echo test >>file &&
 409         echo test >>sub/sub &&
 410         git add file sub/sub &&
 411         git commit -m "modified both"
 412 '
 413
 414 test_expect_success 'difftool -d with growing paths' '
 415         a=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&
 416         git init growing &&
 417         (
 418                 cd growing &&
 419                 echo "test -f \"\$2/b\"" | write_script .git/test-for-b.sh &&
 420                 one=$(printf 1 | git hash-object -w --stdin) &&
 421                 two=$(printf 2 | git hash-object -w --stdin) &&
 422                 git update-index --add \
 423                         --cacheinfo 100644,$one,$a --cacheinfo 100644,$two,b &&
 424                 tree1=$(git write-tree) &&
 425                 git update-index --add \
 426                         --cacheinfo 100644,$two,$a --cacheinfo 100644,$one,b &&
 427                 tree2=$(git write-tree) &&
 428                 git checkout -- $a &&
 429                 git difftool -d --extcmd .git/test-for-b.sh $tree1 $tree2
 430         )
 431 '
 432
 433 run_dir_diff_test () {
 434         test_expect_success "$1 --no-symlinks" "
 435                 symlinks=--no-symlinks &&
 436                 $2
 437         "
 438         test_expect_success SYMLINKS "$1 --symlinks" "
 439                 symlinks=--symlinks &&
 440                 $2
 441         "
 442 }
 443
 444 run_dir_diff_test 'difftool -d' '
 445         git difftool -d $symlinks --extcmd ls branch >output &&
 446         grep "^sub$" output &&
 447         grep "^file$" output
 448 '
 449
 450 run_dir_diff_test 'difftool --dir-diff' '
 451         git difftool --dir-diff $symlinks --extcmd ls branch >output &&
 452         grep "^sub$" output &&
 453         grep "^file$" output
 454 '
 455
 456 run_dir_diff_test 'difftool --dir-diff ignores --prompt' '
 457         git difftool --dir-diff $symlinks --prompt --extcmd ls branch >output &&
 458         grep "^sub$" output &&
 459         grep "^file$" output
 460 '
 461
 462 run_dir_diff_test 'difftool --dir-diff branch from subdirectory' '
 463         (
 464                 cd sub &&
 465                 git difftool --dir-diff $symlinks --extcmd ls branch >output &&
 466                 # "sub" must only exist in "right"
 467                 # "file" and "file2" must be listed in both "left" and "right"
 468                 grep "^sub$" output >sub-output &&
 469                 test_line_count = 1 sub-output &&
 470                 grep "^file$" output >file-output &&
 471                 test_line_count = 2 file-output &&
 472                 grep "^file2$" output >file2-output &&
 473                 test_line_count = 2 file2-output
 474         )
 475 '
 476
 477 run_dir_diff_test 'difftool --dir-diff v1 from subdirectory' '
 478         (
 479                 cd sub &&
 480                 git difftool --dir-diff $symlinks --extcmd ls v1 >output &&
 481                 # "sub" and "file" exist in both v1 and HEAD.
 482                 # "file2" is unchanged.
 483                 grep "^sub$" output >sub-output &&
 484                 test_line_count = 2 sub-output &&
 485                 grep "^file$" output >file-output &&
 486                 test_line_count = 2 file-output &&
 487                 ! grep "^file2$" output
 488         )
 489 '
 490
 491 run_dir_diff_test 'difftool --dir-diff branch from subdirectory w/ pathspec' '
 492         (
 493                 cd sub &&
 494                 git difftool --dir-diff $symlinks --extcmd ls branch -- .>output &&
 495                 # "sub" only exists in "right"
 496                 # "file" and "file2" must not be listed
 497                 grep "^sub$" output >sub-output &&
 498                 test_line_count = 1 sub-output &&
 499                 ! grep "^file$" output
 500         )
 501 '
 502
 503 run_dir_diff_test 'difftool --dir-diff v1 from subdirectory w/ pathspec' '
 504         (
 505                 cd sub &&
 506                 git difftool --dir-diff $symlinks --extcmd ls v1 -- .>output &&
 507                 # "sub" exists in v1 and HEAD
 508                 # "file" is filtered out by the pathspec
 509                 grep "^sub$" output >sub-output &&
 510                 test_line_count = 2 sub-output &&
 511                 ! grep "^file$" output
 512         )
 513 '
 514
 515 run_dir_diff_test 'difftool --dir-diff from subdirectory with GIT_DIR set' '
 516         (
 517                 GIT_DIR=$(pwd)/.git &&
 518                 export GIT_DIR &&
 519                 GIT_WORK_TREE=$(pwd) &&
 520                 export GIT_WORK_TREE &&
 521                 cd sub &&
 522                 git difftool --dir-diff $symlinks --extcmd ls \
 523                         branch -- sub >output &&
 524                 grep "^sub$" output &&
 525                 ! grep "^file$" output
 526         )
 527 '
 528
 529 run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
 530         test_when_finished git reset --hard &&
 531         rm file2 &&
 532         git difftool --dir-diff $symlinks --extcmd ls branch main >output &&
 533         grep "^file2$" output
 534 '
 535
 536 run_dir_diff_test 'difftool --dir-diff with unmerged files' '
 537         test_when_finished git reset --hard &&
 538         test_config difftool.echo.cmd "echo ok" &&
 539         git checkout -B conflict-a &&
 540         git checkout -B conflict-b &&
 541         git checkout conflict-a &&
 542         echo a >>file &&
 543         git add file &&
 544         git commit -m conflict-a &&
 545         git checkout conflict-b &&
 546         echo b >>file &&
 547         git add file &&
 548         git commit -m conflict-b &&
 549         git checkout main &&
 550         git merge conflict-a &&
 551         test_must_fail git merge conflict-b &&
 552         cat >expect <<-EOF &&
 553                 ok
 554         EOF
 555         git difftool --dir-diff $symlinks -t echo >actual &&
 556         test_cmp expect actual
 557 '
 558
 559 write_script .git/CHECK_SYMLINKS <<\EOF
 560 for f in file file2 sub/sub
 561 do
 562         echo "$f"
 563         ls -ld "$2/$f" | sed -e 's/.* -> //'
 564 done >actual
 565 EOF
 566
 567 test_expect_success SYMLINKS 'difftool --dir-diff --symlinks without unstaged changes' '
 568         cat >expect <<-EOF &&
 569         file
 570         $PWD/file
 571         file2
 572         $PWD/file2
 573         sub/sub
 574         $PWD/sub/sub
 575         EOF
 576         git difftool --dir-diff --symlinks \
 577                 --extcmd "./.git/CHECK_SYMLINKS" branch HEAD &&
 578         test_cmp expect actual
 579 '
 580
 581 write_script modify-right-file <<\EOF
 582 echo "new content" >"$2/file"
 583 EOF
 584
 585 run_dir_diff_test 'difftool --dir-diff syncs worktree with unstaged change' '
 586         test_when_finished git reset --hard &&
 587         echo "orig content" >file &&
 588         git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
 589         echo "new content" >expect &&
 590         test_cmp expect file
 591 '
 592
 593 run_dir_diff_test 'difftool --dir-diff syncs worktree without unstaged change' '
 594         test_when_finished git reset --hard &&
 595         git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
 596         echo "new content" >expect &&
 597         test_cmp expect file
 598 '
 599
 600 write_script modify-file <<\EOF
 601 echo "new content" >file
 602 EOF
 603
 604 test_expect_success 'difftool --no-symlinks does not overwrite working tree file ' '
 605         echo "orig content" >file &&
 606         git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-file" branch &&
 607         echo "new content" >expect &&
 608         test_cmp expect file
 609 '
 610
 611 write_script modify-both-files <<\EOF
 612 echo "wt content" >file &&
 613 echo "tmp content" >"$2/file" &&
 614 echo "$2" >tmpdir
 615 EOF
 616
 617 test_expect_success 'difftool --no-symlinks detects conflict ' '
 618         (
 619                 TMPDIR=$TRASH_DIRECTORY &&
 620                 export TMPDIR &&
 621                 echo "orig content" >file &&
 622                 test_must_fail git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-both-files" branch &&
 623                 echo "wt content" >expect &&
 624                 test_cmp expect file &&
 625                 echo "tmp content" >expect &&
 626                 test_cmp expect "$(cat tmpdir)/file"
 627         )
 628 '
 629
 630 test_expect_success 'difftool properly honors gitlink and core.worktree' '
 631         test_when_finished rm -rf submod/ule &&
 632         git submodule add ./. submod/ule &&
 633         test_config -C submod/ule diff.tool checktrees &&
 634         test_config -C submod/ule difftool.checktrees.cmd '\''
 635                 test -d "$LOCAL" && test -d "$REMOTE" && echo good
 636                 '\'' &&
 637         (
 638                 cd submod/ule &&
 639                 echo good >expect &&
 640                 git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
 641                 test_cmp expect actual &&
 642                 rm -f expect actual
 643         )
 644 '
 645
 646 test_expect_success SYMLINKS 'difftool --dir-diff symlinked directories' '
 647         test_when_finished git reset --hard &&
 648         git init dirlinks &&
 649         (
 650                 cd dirlinks &&
 651                 git config diff.tool checktrees &&
 652                 git config difftool.checktrees.cmd "echo good" &&
 653                 mkdir foo &&
 654                 : >foo/bar &&
 655                 git add foo/bar &&
 656                 test_commit symlink-one &&
 657                 ln -s foo link &&
 658                 git add link &&
 659                 test_commit symlink-two &&
 660                 echo good >expect &&
 661                 git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
 662                 test_cmp expect actual
 663         )
 664 '
 665
 666 test_expect_success SYMLINKS 'difftool --dir-diff handles modified symlinks' '
 667         test_when_finished git reset --hard &&
 668         touch b &&
 669         ln -s b c &&
 670         git add b c &&
 671         test_tick &&
 672         git commit -m initial &&
 673         touch d &&
 674         rm c &&
 675         ln -s d c &&
 676         cat >expect <<-EOF &&
 677                 c
 678
 679                 c
 680         EOF
 681         git difftool --symlinks --dir-diff --extcmd ls >output &&
 682         grep -v ^/ output >actual &&
 683         test_cmp expect actual &&
 684
 685         git difftool --no-symlinks --dir-diff --extcmd ls >output &&
 686         grep -v ^/ output >actual &&
 687         test_cmp expect actual &&
 688
 689         # The left side contains symlink "c" that points to "b"
 690         test_config difftool.cat.cmd "cat \$LOCAL/c" &&
 691         printf "%s\n" b >expect &&
 692
 693         git difftool --symlinks --dir-diff --tool cat >actual &&
 694         test_cmp expect actual &&
 695
 696         git difftool --symlinks --no-symlinks --dir-diff --tool cat >actual &&
 697         test_cmp expect actual &&
 698
 699         # The right side contains symlink "c" that points to "d"
 700         test_config difftool.cat.cmd "cat \$REMOTE/c" &&
 701         printf "%s\n" d >expect &&
 702
 703         git difftool --symlinks --dir-diff --tool cat >actual &&
 704         test_cmp expect actual &&
 705
 706         git difftool --no-symlinks --dir-diff --tool cat >actual &&
 707         test_cmp expect actual &&
 708
 709         # Deleted symlinks
 710         rm -f c &&
 711         cat >expect <<-EOF &&
 712                 c
 713
 714         EOF
 715         git difftool --symlinks --dir-diff --extcmd ls >output &&
 716         grep -v ^/ output >actual &&
 717         test_cmp expect actual &&
 718
 719         git difftool --no-symlinks --dir-diff --extcmd ls >output &&
 720         grep -v ^/ output >actual &&
 721         test_cmp expect actual
 722 '
 723
 724 test_expect_success SYMLINKS 'difftool --dir-diff writes symlinks as raw text' '
 725         # Start out on a branch called "branch-init".
 726         git init -b branch-init symlink-files &&
 727         (
 728                 cd symlink-files &&
 729                 # This test ensures that symlinks are written as raw text.
 730                 # The "cat" tools output link and file contents.
 731                 git config difftool.cat-left-link.cmd "cat \"\$LOCAL/link\"" &&
 732                 git config difftool.cat-left-a.cmd "cat \"\$LOCAL/file-a\"" &&
 733                 git config difftool.cat-right-link.cmd "cat \"\$REMOTE/link\"" &&
 734                 git config difftool.cat-right-b.cmd "cat \"\$REMOTE/file-b\"" &&
 735
 736                 # Record the empty initial state so that we can come back here
 737                 # later and not have to consider the any cases where difftool
 738                 # will create symlinks back into the worktree.
 739                 test_tick &&
 740                 git commit --allow-empty -m init &&
 741
 742                 # Create a file called "file-a" with a symlink pointing to it.
 743                 git switch -c branch-a &&
 744                 echo a >file-a &&
 745                 ln -s file-a link &&
 746                 git add file-a link &&
 747                 test_tick &&
 748                 git commit -m link-to-file-a &&
 749
 750                 # Create a file called "file-b" and point the symlink to it.
 751                 git switch -c branch-b &&
 752                 echo b >file-b &&
 753                 rm link &&
 754                 ln -s file-b link &&
 755                 git add file-b link &&
 756                 git rm file-a &&
 757                 test_tick &&
 758                 git commit -m link-to-file-b &&
 759
 760                 # Checkout the initial branch so that the --symlinks behavior is
 761                 # not activated. The two directories should be completely
 762                 # independent with no symlinks pointing back here.
 763                 git switch branch-init &&
 764
 765                 # The left link must be "file-a" and "file-a" must contain "a".
 766                 echo file-a >expect &&
 767                 git difftool --symlinks --dir-diff --tool cat-left-link \
 768                         branch-a branch-b >actual &&
 769                 test_cmp expect actual &&
 770
 771                 echo a >expect &&
 772                 git difftool --symlinks --dir-diff --tool cat-left-a \
 773                         branch-a branch-b >actual &&
 774                 test_cmp expect actual &&
 775
 776                 # The right link must be "file-b" and "file-b" must contain "b".
 777                 echo file-b >expect &&
 778                 git difftool --symlinks --dir-diff --tool cat-right-link \
 779                         branch-a branch-b >actual &&
 780                 test_cmp expect actual &&
 781
 782                 echo b >expect &&
 783                 git difftool --symlinks --dir-diff --tool cat-right-b \
 784                         branch-a branch-b >actual &&
 785                 test_cmp expect actual
 786         )
 787 '
 788
 789 test_expect_success 'add -N and difftool -d' '
 790         test_when_finished git reset --hard &&
 791
 792         test_write_lines A B C >intent-to-add &&
 793         git add -N intent-to-add &&
 794         git difftool --dir-diff --extcmd ls
 795 '
 796
 797 test_expect_success 'difftool --cached with unmerged files' '
 798         test_when_finished git reset --hard &&
 799
 800         test_commit conflicting &&
 801         test_commit conflict-a conflict.t a &&
 802         git reset --hard conflicting &&
 803         test_commit conflict-b conflict.t b &&
 804         test_must_fail git merge conflict-a &&
 805
 806         git difftool --cached --no-prompt >output &&
 807         test_must_be_empty output
 808 '
 809
 810 test_expect_success 'outside worktree' '
 811         echo 1 >1 &&
 812         echo 2 >2 &&
 813         test_expect_code 1 nongit git \
 814                 -c diff.tool=echo -c difftool.echo.cmd="echo \$LOCAL \$REMOTE" \
 815                 difftool --no-prompt --no-index ../1 ../2 >actual &&
 816         echo "../1 ../2" >expect &&
 817         test_cmp expect actual
 818 '
 819
 820 test_expect_success 'difftool --gui, --tool and --extcmd are mutually exclusive' '
 821         difftool_test_setup &&
 822         test_must_fail git difftool --gui --tool=test-tool &&
 823         test_must_fail git difftool --gui --extcmd=cat &&
 824         test_must_fail git difftool --tool=test-tool --extcmd=cat &&
 825         test_must_fail git difftool --gui --tool=test-tool --extcmd=cat
 826 '
 827
 828 test_expect_success 'difftool --rotate-to' '
 829         difftool_test_setup &&
 830         test_when_finished git reset --hard &&
 831         echo 1 >1 &&
 832         echo 2 >2 &&
 833         echo 4 >4 &&
 834         git add 1 2 4 &&
 835         git commit -a -m "124" &&
 836         git difftool --no-prompt --extcmd=cat --rotate-to="2" HEAD^ >output &&
 837         cat >expect <<-\EOF &&
 838         2
 839         4
 840         1
 841         EOF
 842         test_cmp output expect
 843 '
 844
 845 test_expect_success 'difftool --skip-to' '
 846         difftool_test_setup &&
 847         test_when_finished git reset --hard &&
 848         git difftool --no-prompt --extcmd=cat --skip-to="2" HEAD^ >output &&
 849         cat >expect <<-\EOF &&
 850         2
 851         4
 852         EOF
 853         test_cmp output expect
 854 '
 855
 856 test_expect_success 'difftool --rotate/skip-to error condition' '
 857         test_must_fail git difftool --no-prompt --extcmd=cat --rotate-to="3" HEAD^ &&
 858         test_must_fail git difftool --no-prompt --extcmd=cat --skip-to="3" HEAD^
 859 '
 860 test_done