t/t6022-merge-rename.sh

   1 #!/bin/sh
   2
   3 test_description='Merge-recursive merging renames'
   4 . ./test-lib.sh
   5
   6 modify () {
   7         sed -e "$1" <"$2" >"$2.x" &&
   8         mv "$2.x" "$2"
   9 }
  10
  11 test_expect_success setup \
  12 '
  13 cat >A <<\EOF &&
  14 a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  15 b bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
  16 c cccccccccccccccccccccccccccccccccccccccccccccccc
  17 d dddddddddddddddddddddddddddddddddddddddddddddddd
  18 e eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
  19 f ffffffffffffffffffffffffffffffffffffffffffffffff
  20 g gggggggggggggggggggggggggggggggggggggggggggggggg
  21 h hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
  22 i iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
  23 j jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
  24 k kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
  25 l llllllllllllllllllllllllllllllllllllllllllllllll
  26 m mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
  27 n nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
  28 o oooooooooooooooooooooooooooooooooooooooooooooooo
  29 EOF
  30
  31 cat >M <<\EOF &&
  32 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  33 B BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
  34 C CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  35 D DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
  36 E EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
  37 F FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
  38 G GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
  39 H HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
  40 I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
  41 J JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
  42 K KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
  43 L LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
  44 M MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
  45 N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
  46 O OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
  47 EOF
  48
  49 git add A M &&
  50 git commit -m "initial has A and M" &&
  51 git branch white &&
  52 git branch red &&
  53 git branch blue &&
  54 git branch yellow &&
  55 git branch change &&
  56 git branch change+rename &&
  57
  58 sed -e "/^g /s/.*/g : master changes a line/" <A >A+ &&
  59 mv A+ A &&
  60 git commit -a -m "master updates A" &&
  61
  62 git checkout yellow &&
  63 rm -f M &&
  64 git commit -a -m "yellow removes M" &&
  65
  66 git checkout white &&
  67 sed -e "/^g /s/.*/g : white changes a line/" <A >B &&
  68 sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
  69 rm -f A M &&
  70 git update-index --add --remove A B M N &&
  71 git commit -m "white renames A->B, M->N" &&
  72
  73 git checkout red &&
  74 sed -e "/^g /s/.*/g : red changes a line/" <A >B &&
  75 sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
  76 rm -f A M &&
  77 git update-index --add --remove A B M N &&
  78 git commit -m "red renames A->B, M->N" &&
  79
  80 git checkout blue &&
  81 sed -e "/^g /s/.*/g : blue changes a line/" <A >C &&
  82 sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
  83 rm -f A M &&
  84 git update-index --add --remove A C M N &&
  85 git commit -m "blue renames A->C, M->N" &&
  86
  87 git checkout change &&
  88 sed -e "/^g /s/.*/g : changed line/" <A >A+ &&
  89 mv A+ A &&
  90 git commit -q -a -m "changed" &&
  91
  92 git checkout change+rename &&
  93 sed -e "/^g /s/.*/g : changed line/" <A >B &&
  94 rm A &&
  95 git update-index --add B &&
  96 git commit -q -a -m "changed and renamed" &&
  97
  98 git checkout master'
  99
 100 test_expect_success 'pull renaming branch into unrenaming one' \
 101 '
 102         git show-branch &&
 103         test_expect_code 1 git pull . white &&
 104         git ls-files -s &&
 105         git ls-files -u B >b.stages &&
 106         test_line_count = 3 b.stages &&
 107         git ls-files -s N >n.stages &&
 108         test_line_count = 1 n.stages &&
 109         sed -ne "/^g/{
 110         p
 111         q
 112         }" B | grep master &&
 113         git diff --exit-code white N
 114 '
 115
 116 test_expect_success 'pull renaming branch into another renaming one' \
 117 '
 118         rm -f B &&
 119         git reset --hard &&
 120         git checkout red &&
 121         test_expect_code 1 git pull . white &&
 122         git ls-files -u B >b.stages &&
 123         test_line_count = 3 b.stages &&
 124         git ls-files -s N >n.stages &&
 125         test_line_count = 1 n.stages &&
 126         sed -ne "/^g/{
 127         p
 128         q
 129         }" B | grep red &&
 130         git diff --exit-code white N
 131 '
 132
 133 test_expect_success 'pull unrenaming branch into renaming one' \
 134 '
 135         git reset --hard &&
 136         git show-branch &&
 137         test_expect_code 1 git pull . master &&
 138         git ls-files -u B >b.stages &&
 139         test_line_count = 3 b.stages &&
 140         git ls-files -s N >n.stages &&
 141         test_line_count = 1 n.stages &&
 142         sed -ne "/^g/{
 143         p
 144         q
 145         }" B | grep red &&
 146         git diff --exit-code white N
 147 '
 148
 149 test_expect_success 'pull conflicting renames' \
 150 '
 151         git reset --hard &&
 152         git show-branch &&
 153         test_expect_code 1 git pull . blue &&
 154         git ls-files -u A >a.stages &&
 155         test_line_count = 1 a.stages &&
 156         git ls-files -u B >b.stages &&
 157         test_line_count = 1 b.stages &&
 158         git ls-files -u C >c.stages &&
 159         test_line_count = 1 c.stages &&
 160         git ls-files -s N >n.stages &&
 161         test_line_count = 1 n.stages &&
 162         sed -ne "/^g/{
 163         p
 164         q
 165         }" B | grep red &&
 166         git diff --exit-code white N
 167 '
 168
 169 test_expect_success 'interference with untracked working tree file' '
 170         git reset --hard &&
 171         git show-branch &&
 172         echo >A this file should not matter &&
 173         test_expect_code 1 git pull . white &&
 174         test_path_is_file A
 175 '
 176
 177 test_expect_success 'interference with untracked working tree file' '
 178         git reset --hard &&
 179         git checkout white &&
 180         git show-branch &&
 181         rm -f A &&
 182         echo >A this file should not matter &&
 183         test_expect_code 1 git pull . red &&
 184         test_path_is_file A
 185 '
 186
 187 test_expect_success 'interference with untracked working tree file' '
 188         git reset --hard &&
 189         rm -f A M &&
 190         git checkout -f master &&
 191         git tag -f anchor &&
 192         git show-branch &&
 193         git pull . yellow &&
 194         test_path_is_missing M &&
 195         git reset --hard anchor
 196 '
 197
 198 test_expect_success 'updated working tree file should prevent the merge' '
 199         git reset --hard &&
 200         rm -f A M &&
 201         git checkout -f master &&
 202         git tag -f anchor &&
 203         git show-branch &&
 204         echo >>M one line addition &&
 205         cat M >M.saved &&
 206         test_expect_code 128 git pull . yellow &&
 207         test_cmp M M.saved &&
 208         rm -f M.saved
 209 '
 210
 211 test_expect_success 'updated working tree file should prevent the merge' '
 212         git reset --hard &&
 213         rm -f A M &&
 214         git checkout -f master &&
 215         git tag -f anchor &&
 216         git show-branch &&
 217         echo >>M one line addition &&
 218         cat M >M.saved &&
 219         git update-index M &&
 220         test_expect_code 128 git pull . yellow &&
 221         test_cmp M M.saved &&
 222         rm -f M.saved
 223 '
 224
 225 test_expect_success 'interference with untracked working tree file' '
 226         git reset --hard &&
 227         rm -f A M &&
 228         git checkout -f yellow &&
 229         git tag -f anchor &&
 230         git show-branch &&
 231         echo >M this file should not matter &&
 232         git pull . master &&
 233         test_path_is_file M &&
 234         ! {
 235                 git ls-files -s |
 236                 grep M
 237         } &&
 238         git reset --hard anchor
 239 '
 240
 241 test_expect_success 'merge of identical changes in a renamed file' '
 242         rm -f A M N &&
 243         git reset --hard &&
 244         git checkout change+rename &&
 245         GIT_MERGE_VERBOSITY=3 git merge change | test_i18ngrep "^Skipped B" &&
 246         git reset --hard HEAD^ &&
 247         git checkout change &&
 248         GIT_MERGE_VERBOSITY=3 git merge change+rename | test_i18ngrep "^Skipped B"
 249 '
 250
 251 test_expect_success 'setup for rename + d/f conflicts' '
 252         git reset --hard &&
 253         git checkout --orphan dir-in-way &&
 254         git rm -rf . &&
 255         git clean -fdqx &&
 256
 257         mkdir sub &&
 258         mkdir dir &&
 259         printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >sub/file &&
 260         echo foo >dir/file-in-the-way &&
 261         git add -A &&
 262         git commit -m "Common commmit" &&
 263
 264         echo 11 >>sub/file &&
 265         echo more >>dir/file-in-the-way &&
 266         git add -u &&
 267         git commit -m "Commit to merge, with dir in the way" &&
 268
 269         git checkout -b dir-not-in-way &&
 270         git reset --soft HEAD^ &&
 271         git rm -rf dir &&
 272         git commit -m "Commit to merge, with dir removed" -- dir sub/file &&
 273
 274         git checkout -b renamed-file-has-no-conflicts dir-in-way~1 &&
 275         git rm -rf dir &&
 276         git rm sub/file &&
 277         printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n" >dir &&
 278         git add dir &&
 279         git commit -m "Independent change" &&
 280
 281         git checkout -b renamed-file-has-conflicts dir-in-way~1 &&
 282         git rm -rf dir &&
 283         git mv sub/file dir &&
 284         echo 12 >>dir &&
 285         git add dir &&
 286         git commit -m "Conflicting change"
 287 '
 288
 289 printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n11\n" >expected
 290
 291 test_expect_success 'Rename+D/F conflict; renamed file merges + dir not in way' '
 292         git reset --hard &&
 293         git checkout -q renamed-file-has-no-conflicts^0 &&
 294         git merge --strategy=recursive dir-not-in-way &&
 295         git diff --quiet &&
 296         test -f dir &&
 297         test_cmp expected dir
 298 '
 299
 300 test_expect_success 'Rename+D/F conflict; renamed file merges but dir in way' '
 301         git reset --hard &&
 302         rm -rf dir~* &&
 303         git checkout -q renamed-file-has-no-conflicts^0 &&
 304         test_must_fail git merge --strategy=recursive dir-in-way >output &&
 305
 306         test_i18ngrep "CONFLICT (modify/delete): dir/file-in-the-way" output &&
 307         test_i18ngrep "Auto-merging dir" output &&
 308         test_i18ngrep "Adding as dir~HEAD instead" output &&
 309
 310         test 3 -eq "$(git ls-files -u | wc -l)" &&
 311         test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" &&
 312
 313         test_must_fail git diff --quiet &&
 314         test_must_fail git diff --cached --quiet &&
 315
 316         test -f dir/file-in-the-way &&
 317         test -f dir~HEAD &&
 318         test_cmp expected dir~HEAD
 319 '
 320
 321 test_expect_success 'Same as previous, but merged other way' '
 322         git reset --hard &&
 323         rm -rf dir~* &&
 324         git checkout -q dir-in-way^0 &&
 325         test_must_fail git merge --strategy=recursive renamed-file-has-no-conflicts >output 2>errors &&
 326
 327         ! grep "error: refusing to lose untracked file at" errors &&
 328         test_i18ngrep "CONFLICT (modify/delete): dir/file-in-the-way" output &&
 329         test_i18ngrep "Auto-merging dir" output &&
 330         test_i18ngrep "Adding as dir~renamed-file-has-no-conflicts instead" output &&
 331
 332         test 3 -eq "$(git ls-files -u | wc -l)" &&
 333         test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" &&
 334
 335         test_must_fail git diff --quiet &&
 336         test_must_fail git diff --cached --quiet &&
 337
 338         test -f dir/file-in-the-way &&
 339         test -f dir~renamed-file-has-no-conflicts &&
 340         test_cmp expected dir~renamed-file-has-no-conflicts
 341 '
 342
 343 cat >expected <<\EOF &&
 344 1
 345 2
 346 3
 347 4
 348 5
 349 6
 350 7
 351 8
 352 9
 353 10
 354 <<<<<<< HEAD:dir
 355 12
 356 =======
 357 11
 358 >>>>>>> dir-not-in-way:sub/file
 359 EOF
 360
 361 test_expect_success 'Rename+D/F conflict; renamed file cannot merge, dir not in way' '
 362         git reset --hard &&
 363         rm -rf dir~* &&
 364         git checkout -q renamed-file-has-conflicts^0 &&
 365         test_must_fail git merge --strategy=recursive dir-not-in-way &&
 366
 367         test 3 -eq "$(git ls-files -u | wc -l)" &&
 368         test 3 -eq "$(git ls-files -u dir | wc -l)" &&
 369
 370         test_must_fail git diff --quiet &&
 371         test_must_fail git diff --cached --quiet &&
 372
 373         test -f dir &&
 374         test_cmp expected dir
 375 '
 376
 377 test_expect_success 'Rename+D/F conflict; renamed file cannot merge and dir in the way' '
 378         modify s/dir-not-in-way/dir-in-way/ expected &&
 379
 380         git reset --hard &&
 381         rm -rf dir~* &&
 382         git checkout -q renamed-file-has-conflicts^0 &&
 383         test_must_fail git merge --strategy=recursive dir-in-way &&
 384
 385         test 5 -eq "$(git ls-files -u | wc -l)" &&
 386         test 3 -eq "$(git ls-files -u dir | grep -v file-in-the-way | wc -l)" &&
 387         test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" &&
 388
 389         test_must_fail git diff --quiet &&
 390         test_must_fail git diff --cached --quiet &&
 391
 392         test -f dir/file-in-the-way &&
 393         test -f dir~HEAD &&
 394         test_cmp expected dir~HEAD
 395 '
 396
 397 cat >expected <<\EOF &&
 398 1
 399 2
 400 3
 401 4
 402 5
 403 6
 404 7
 405 8
 406 9
 407 10
 408 <<<<<<< HEAD:sub/file
 409 11
 410 =======
 411 12
 412 >>>>>>> renamed-file-has-conflicts:dir
 413 EOF
 414
 415 test_expect_success 'Same as previous, but merged other way' '
 416         git reset --hard &&
 417         rm -rf dir~* &&
 418         git checkout -q dir-in-way^0 &&
 419         test_must_fail git merge --strategy=recursive renamed-file-has-conflicts &&
 420
 421         test 5 -eq "$(git ls-files -u | wc -l)" &&
 422         test 3 -eq "$(git ls-files -u dir | grep -v file-in-the-way | wc -l)" &&
 423         test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" &&
 424
 425         test_must_fail git diff --quiet &&
 426         test_must_fail git diff --cached --quiet &&
 427
 428         test -f dir/file-in-the-way &&
 429         test -f dir~renamed-file-has-conflicts &&
 430         test_cmp expected dir~renamed-file-has-conflicts
 431 '
 432
 433 test_expect_success 'setup both rename source and destination involved in D/F conflict' '
 434         git reset --hard &&
 435         git checkout --orphan rename-dest &&
 436         git rm -rf . &&
 437         git clean -fdqx &&
 438
 439         mkdir one &&
 440         echo stuff >one/file &&
 441         git add -A &&
 442         git commit -m "Common commmit" &&
 443
 444         git mv one/file destdir &&
 445         git commit -m "Renamed to destdir" &&
 446
 447         git checkout -b source-conflict HEAD~1 &&
 448         git rm -rf one &&
 449         mkdir destdir &&
 450         touch one destdir/foo &&
 451         git add -A &&
 452         git commit -m "Conflicts in the way"
 453 '
 454
 455 test_expect_success 'both rename source and destination involved in D/F conflict' '
 456         git reset --hard &&
 457         rm -rf dir~* &&
 458         git checkout -q rename-dest^0 &&
 459         test_must_fail git merge --strategy=recursive source-conflict &&
 460
 461         test 1 -eq "$(git ls-files -u | wc -l)" &&
 462
 463         test_must_fail git diff --quiet &&
 464
 465         test -f destdir/foo &&
 466         test -f one &&
 467         test -f destdir~HEAD &&
 468         test "stuff" = "$(cat destdir~HEAD)"
 469 '
 470
 471 test_expect_success 'setup pair rename to parent of other (D/F conflicts)' '
 472         git reset --hard &&
 473         git checkout --orphan rename-two &&
 474         git rm -rf . &&
 475         git clean -fdqx &&
 476
 477         mkdir one &&
 478         mkdir two &&
 479         echo stuff >one/file &&
 480         echo other >two/file &&
 481         git add -A &&
 482         git commit -m "Common commmit" &&
 483
 484         git rm -rf one &&
 485         git mv two/file one &&
 486         git commit -m "Rename two/file -> one" &&
 487
 488         git checkout -b rename-one HEAD~1 &&
 489         git rm -rf two &&
 490         git mv one/file two &&
 491         rm -r one &&
 492         git commit -m "Rename one/file -> two"
 493 '
 494
 495 test_expect_success 'pair rename to parent of other (D/F conflicts) w/ untracked dir' '
 496         git checkout -q rename-one^0 &&
 497         mkdir one &&
 498         test_must_fail git merge --strategy=recursive rename-two &&
 499
 500         test 2 -eq "$(git ls-files -u | wc -l)" &&
 501         test 1 -eq "$(git ls-files -u one | wc -l)" &&
 502         test 1 -eq "$(git ls-files -u two | wc -l)" &&
 503
 504         test_must_fail git diff --quiet &&
 505
 506         test 4 -eq $(find . | grep -v .git | wc -l) &&
 507
 508         test -d one &&
 509         test -f one~rename-two &&
 510         test -f two &&
 511         test "other" = $(cat one~rename-two) &&
 512         test "stuff" = $(cat two)
 513 '
 514
 515 test_expect_success 'pair rename to parent of other (D/F conflicts) w/ clean start' '
 516         git reset --hard &&
 517         git clean -fdqx &&
 518         test_must_fail git merge --strategy=recursive rename-two &&
 519
 520         test 2 -eq "$(git ls-files -u | wc -l)" &&
 521         test 1 -eq "$(git ls-files -u one | wc -l)" &&
 522         test 1 -eq "$(git ls-files -u two | wc -l)" &&
 523
 524         test_must_fail git diff --quiet &&
 525
 526         test 3 -eq $(find . | grep -v .git | wc -l) &&
 527
 528         test -f one &&
 529         test -f two &&
 530         test "other" = $(cat one) &&
 531         test "stuff" = $(cat two)
 532 '
 533
 534 test_expect_success 'setup rename of one file to two, with directories in the way' '
 535         git reset --hard &&
 536         git checkout --orphan first-rename &&
 537         git rm -rf . &&
 538         git clean -fdqx &&
 539
 540         echo stuff >original &&
 541         git add -A &&
 542         git commit -m "Common commmit" &&
 543
 544         mkdir two &&
 545         >two/file &&
 546         git add two/file &&
 547         git mv original one &&
 548         git commit -m "Put two/file in the way, rename to one" &&
 549
 550         git checkout -b second-rename HEAD~1 &&
 551         mkdir one &&
 552         >one/file &&
 553         git add one/file &&
 554         git mv original two &&
 555         git commit -m "Put one/file in the way, rename to two"
 556 '
 557
 558 test_expect_success 'check handling of differently renamed file with D/F conflicts' '
 559         git checkout -q first-rename^0 &&
 560         test_must_fail git merge --strategy=recursive second-rename &&
 561
 562         test 5 -eq "$(git ls-files -s | wc -l)" &&
 563         test 3 -eq "$(git ls-files -u | wc -l)" &&
 564         test 1 -eq "$(git ls-files -u one | wc -l)" &&
 565         test 1 -eq "$(git ls-files -u two | wc -l)" &&
 566         test 1 -eq "$(git ls-files -u original | wc -l)" &&
 567         test 2 -eq "$(git ls-files -o | wc -l)" &&
 568
 569         test -f one/file &&
 570         test -f two/file &&
 571         test -f one~HEAD &&
 572         test -f two~second-rename &&
 573         ! test -f original
 574 '
 575
 576 test_expect_success 'setup rename one file to two; directories moving out of the way' '
 577         git reset --hard &&
 578         git checkout --orphan first-rename-redo &&
 579         git rm -rf . &&
 580         git clean -fdqx &&
 581
 582         echo stuff >original &&
 583         mkdir one two &&
 584         touch one/file two/file &&
 585         git add -A &&
 586         git commit -m "Common commmit" &&
 587
 588         git rm -rf one &&
 589         git mv original one &&
 590         git commit -m "Rename to one" &&
 591
 592         git checkout -b second-rename-redo HEAD~1 &&
 593         git rm -rf two &&
 594         git mv original two &&
 595         git commit -m "Rename to two"
 596 '
 597
 598 test_expect_success 'check handling of differently renamed file with D/F conflicts' '
 599         git checkout -q first-rename-redo^0 &&
 600         test_must_fail git merge --strategy=recursive second-rename-redo &&
 601
 602         test 3 -eq "$(git ls-files -u | wc -l)" &&
 603         test 1 -eq "$(git ls-files -u one | wc -l)" &&
 604         test 1 -eq "$(git ls-files -u two | wc -l)" &&
 605         test 1 -eq "$(git ls-files -u original | wc -l)" &&
 606         test 0 -eq "$(git ls-files -o | wc -l)" &&
 607
 608         test -f one &&
 609         test -f two &&
 610         ! test -f original
 611 '
 612
 613 test_expect_success 'setup avoid unnecessary update, normal rename' '
 614         git reset --hard &&
 615         git checkout --orphan avoid-unnecessary-update-1 &&
 616         git rm -rf . &&
 617         git clean -fdqx &&
 618
 619         printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >original &&
 620         git add -A &&
 621         git commit -m "Common commmit" &&
 622
 623         git mv original rename &&
 624         echo 11 >>rename &&
 625         git add -u &&
 626         git commit -m "Renamed and modified" &&
 627
 628         git checkout -b merge-branch-1 HEAD~1 &&
 629         echo "random content" >random-file &&
 630         git add -A &&
 631         git commit -m "Random, unrelated changes"
 632 '
 633
 634 test_expect_success 'avoid unnecessary update, normal rename' '
 635         git checkout -q avoid-unnecessary-update-1^0 &&
 636         test-chmtime =1000000000 rename &&
 637         test-chmtime -v +0 rename >expect &&
 638         git merge merge-branch-1 &&
 639         test-chmtime -v +0 rename >actual &&
 640         test_cmp expect actual # "rename" should have stayed intact
 641 '
 642
 643 test_expect_success 'setup to test avoiding unnecessary update, with D/F conflict' '
 644         git reset --hard &&
 645         git checkout --orphan avoid-unnecessary-update-2 &&
 646         git rm -rf . &&
 647         git clean -fdqx &&
 648
 649         mkdir df &&
 650         printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >df/file &&
 651         git add -A &&
 652         git commit -m "Common commmit" &&
 653
 654         git mv df/file temp &&
 655         rm -rf df &&
 656         git mv temp df &&
 657         echo 11 >>df &&
 658         git add -u &&
 659         git commit -m "Renamed and modified" &&
 660
 661         git checkout -b merge-branch-2 HEAD~1 &&
 662         >unrelated-change &&
 663         git add unrelated-change &&
 664         git commit -m "Only unrelated changes"
 665 '
 666
 667 test_expect_success 'avoid unnecessary update, with D/F conflict' '
 668         git checkout -q avoid-unnecessary-update-2^0 &&
 669         test-chmtime =1000000000 df &&
 670         test-chmtime -v +0 df >expect &&
 671         git merge merge-branch-2 &&
 672         test-chmtime -v +0 df >actual &&
 673         test_cmp expect actual # "df" should have stayed intact
 674 '
 675
 676 test_expect_success 'setup avoid unnecessary update, dir->(file,nothing)' '
 677         git rm -rf . &&
 678         git clean -fdqx &&
 679         rm -rf .git &&
 680         git init &&
 681
 682         >irrelevant &&
 683         mkdir df &&
 684         >df/file &&
 685         git add -A &&
 686         git commit -mA &&
 687
 688         git checkout -b side
 689         git rm -rf df &&
 690         git commit -mB &&
 691
 692         git checkout master &&
 693         git rm -rf df &&
 694         echo bla >df &&
 695         git add -A &&
 696         git commit -m "Add a newfile"
 697 '
 698
 699 test_expect_success 'avoid unnecessary update, dir->(file,nothing)' '
 700         git checkout -q master^0 &&
 701         test-chmtime =1000000000 df &&
 702         test-chmtime -v +0 df >expect &&
 703         git merge side &&
 704         test-chmtime -v +0 df >actual &&
 705         test_cmp expect actual # "df" should have stayed intact
 706 '
 707
 708 test_expect_success 'setup avoid unnecessary update, modify/delete' '
 709         git rm -rf . &&
 710         git clean -fdqx &&
 711         rm -rf .git &&
 712         git init &&
 713
 714         >irrelevant &&
 715         >file &&
 716         git add -A &&
 717         git commit -mA &&
 718
 719         git checkout -b side
 720         git rm -f file &&
 721         git commit -m "Delete file" &&
 722
 723         git checkout master &&
 724         echo bla >file &&
 725         git add -A &&
 726         git commit -m "Modify file"
 727 '
 728
 729 test_expect_success 'avoid unnecessary update, modify/delete' '
 730         git checkout -q master^0 &&
 731         test-chmtime =1000000000 file &&
 732         test-chmtime -v +0 file >expect &&
 733         test_must_fail git merge side &&
 734         test-chmtime -v +0 file >actual &&
 735         test_cmp expect actual # "file" should have stayed intact
 736 '
 737
 738 test_expect_success 'setup avoid unnecessary update, rename/add-dest' '
 739         git rm -rf . &&
 740         git clean -fdqx &&
 741         rm -rf .git &&
 742         git init &&
 743
 744         printf "1\n2\n3\n4\n5\n6\n7\n8\n" >file &&
 745         git add -A &&
 746         git commit -mA &&
 747
 748         git checkout -b side
 749         cp file newfile &&
 750         git add -A &&
 751         git commit -m "Add file copy" &&
 752
 753         git checkout master &&
 754         git mv file newfile &&
 755         git commit -m "Rename file"
 756 '
 757
 758 test_expect_success 'avoid unnecessary update, rename/add-dest' '
 759         git checkout -q master^0 &&
 760         test-chmtime =1000000000 newfile &&
 761         test-chmtime -v +0 newfile >expect &&
 762         git merge side &&
 763         test-chmtime -v +0 newfile >actual &&
 764         test_cmp expect actual # "file" should have stayed intact
 765 '
 766
 767 test_expect_success 'setup merge of rename + small change' '
 768         git reset --hard &&
 769         git checkout --orphan rename-plus-small-change &&
 770         git rm -rf . &&
 771         git clean -fdqx &&
 772
 773         echo ORIGINAL >file &&
 774         git add file &&
 775
 776         test_tick &&
 777         git commit -m Initial &&
 778         git checkout -b rename_branch &&
 779         git mv file renamed_file &&
 780         git commit -m Rename &&
 781         git checkout rename-plus-small-change &&
 782         echo NEW-VERSION >file &&
 783         git commit -a -m Reformat
 784 '
 785
 786 test_expect_success 'merge rename + small change' '
 787         git merge rename_branch &&
 788
 789         test 1 -eq $(git ls-files -s | wc -l) &&
 790         test 0 -eq $(git ls-files -o | wc -l) &&
 791         test $(git rev-parse HEAD:renamed_file) = $(git rev-parse HEAD~1:file)
 792 '
 793
 794 test_expect_success 'setup for use of extended merge markers' '
 795         git rm -rf . &&
 796         git clean -fdqx &&
 797         rm -rf .git &&
 798         git init &&
 799
 800         printf "1\n2\n3\n4\n5\n6\n7\n8\n" >original_file &&
 801         git add original_file &&
 802         git commit -mA &&
 803
 804         git checkout -b rename &&
 805         echo 9 >>original_file &&
 806         git add original_file &&
 807         git mv original_file renamed_file &&
 808         git commit -mB &&
 809
 810         git checkout master &&
 811         echo 8.5 >>original_file &&
 812         git add original_file &&
 813         git commit -mC
 814 '
 815
 816 cat >expected <<\EOF &&
 817 1
 818 2
 819 3
 820 4
 821 5
 822 6
 823 7
 824 8
 825 <<<<<<< HEAD:renamed_file
 826 9
 827 =======
 828 8.5
 829 >>>>>>> master^0:original_file
 830 EOF
 831
 832 test_expect_success 'merge master into rename has correct extended markers' '
 833         git checkout rename^0 &&
 834         test_must_fail git merge -s recursive master^0 &&
 835         test_cmp expected renamed_file
 836 '
 837
 838 cat >expected <<\EOF &&
 839 1
 840 2
 841 3
 842 4
 843 5
 844 6
 845 7
 846 8
 847 <<<<<<< HEAD:original_file
 848 8.5
 849 =======
 850 9
 851 >>>>>>> rename^0:renamed_file
 852 EOF
 853
 854 test_expect_success 'merge rename into master has correct extended markers' '
 855         git reset --hard &&
 856         git checkout master^0 &&
 857         test_must_fail git merge -s recursive rename^0 &&
 858         test_cmp expected renamed_file
 859 '
 860
 861 test_expect_success 'setup spurious "refusing to lose untracked" message' '
 862         git rm -rf . &&
 863         git clean -fdqx &&
 864         rm -rf .git &&
 865         git init &&
 866
 867         > irrelevant_file &&
 868         printf "1\n2\n3\n4\n5\n6\n7\n8\n" >original_file &&
 869         git add irrelevant_file original_file &&
 870         git commit -mA &&
 871
 872         git checkout -b rename &&
 873         git mv original_file renamed_file &&
 874         git commit -mB &&
 875
 876         git checkout master &&
 877         git rm original_file &&
 878         git commit -mC
 879 '
 880
 881 test_expect_success 'no spurious "refusing to lose untracked" message' '
 882         git checkout master^0 &&
 883         test_must_fail git merge rename^0 2>errors.txt &&
 884         ! grep "refusing to lose untracked file" errors.txt
 885 '
 886
 887 test_expect_success 'do not follow renames for empty files' '
 888         git checkout -f -b empty-base &&
 889         >empty1 &&
 890         git add empty1 &&
 891         git commit -m base &&
 892         echo content >empty1 &&
 893         git add empty1 &&
 894         git commit -m fill &&
 895         git checkout -b empty-topic HEAD^ &&
 896         git mv empty1 empty2 &&
 897         git commit -m rename &&
 898         test_must_fail git merge empty-base &&
 899         >expect &&
 900         test_cmp expect empty2
 901 '
 902
 903 test_done