t/t6042-merge-rename-corner-cases.sh

   1 #!/bin/sh
   2
   3 test_description="recursive merge corner cases w/ renames but not criss-crosses"
   4 # t6036 has corner cases that involve both criss-cross merges and renames
   5
   6 . ./test-lib.sh
   7
   8 test_setup_rename_delete_untracked () {
   9         test_create_repo rename-delete-untracked &&
  10         (
  11                 cd rename-delete-untracked &&
  12
  13                 echo "A pretty inscription" >ring &&
  14                 git add ring &&
  15                 test_tick &&
  16                 git commit -m beginning &&
  17
  18                 git branch people &&
  19                 git checkout -b rename-the-ring &&
  20                 git mv ring one-ring-to-rule-them-all &&
  21                 test_tick &&
  22                 git commit -m fullname &&
  23
  24                 git checkout people &&
  25                 git rm ring &&
  26                 echo gollum >owner &&
  27                 git add owner &&
  28                 test_tick &&
  29                 git commit -m track-people-instead-of-objects &&
  30                 echo "Myyy PRECIOUSSS" >ring
  31         )
  32 }
  33
  34 test_expect_success "Does git preserve Gollum's precious artifact?" '
  35         test_setup_rename_delete_untracked &&
  36         (
  37                 cd rename-delete-untracked &&
  38
  39                 test_must_fail git merge -s recursive rename-the-ring &&
  40
  41                 # Make sure git did not delete an untracked file
  42                 test_path_is_file ring
  43         )
  44 '
  45
  46 # Testcase setup for rename/modify/add-source:
  47 #   Commit A: new file: a
  48 #   Commit B: modify a slightly
  49 #   Commit C: rename a->b, add completely different a
  50 #
  51 # We should be able to merge B & C cleanly
  52
  53 test_setup_rename_modify_add_source () {
  54         test_create_repo rename-modify-add-source &&
  55         (
  56                 cd rename-modify-add-source &&
  57
  58                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
  59                 git add a &&
  60                 git commit -m A &&
  61                 git tag A &&
  62
  63                 git checkout -b B A &&
  64                 echo 8 >>a &&
  65                 git add a &&
  66                 git commit -m B &&
  67
  68                 git checkout -b C A &&
  69                 git mv a b &&
  70                 echo something completely different >a &&
  71                 git add a &&
  72                 git commit -m C
  73         )
  74 }
  75
  76 test_expect_failure 'rename/modify/add-source conflict resolvable' '
  77         test_setup_rename_modify_add_source &&
  78         (
  79                 cd rename-modify-add-source &&
  80
  81                 git checkout B^0 &&
  82
  83                 git merge -s recursive C^0 &&
  84
  85                 git rev-parse >expect \
  86                         B:a   C:a     &&
  87                 git rev-parse >actual \
  88                         b     c       &&
  89                 test_cmp expect actual
  90         )
  91 '
  92
  93 test_setup_break_detection_1 () {
  94         test_create_repo break-detection-1 &&
  95         (
  96                 cd break-detection-1 &&
  97
  98                 printf "1\n2\n3\n4\n5\n" >a &&
  99                 echo foo >b &&
 100                 git add a b &&
 101                 git commit -m A &&
 102                 git tag A &&
 103
 104                 git checkout -b B A &&
 105                 git mv a c &&
 106                 echo "Completely different content" >a &&
 107                 git add a &&
 108                 git commit -m B &&
 109
 110                 git checkout -b C A &&
 111                 echo 6 >>a &&
 112                 git add a &&
 113                 git commit -m C
 114         )
 115 }
 116
 117 test_expect_failure 'conflict caused if rename not detected' '
 118         test_setup_break_detection_1 &&
 119         (
 120                 cd break-detection-1 &&
 121
 122                 git checkout -q C^0 &&
 123                 git merge -s recursive B^0 &&
 124
 125                 git ls-files -s >out &&
 126                 test_line_count = 3 out &&
 127                 git ls-files -u >out &&
 128                 test_line_count = 0 out &&
 129                 git ls-files -o >out &&
 130                 test_line_count = 1 out &&
 131
 132                 test_line_count = 6 c &&
 133                 git rev-parse >expect \
 134                         B:a   A:b     &&
 135                 git rev-parse >actual \
 136                         :0:a  :0:b    &&
 137                 test_cmp expect actual
 138         )
 139 '
 140
 141 test_setup_break_detection_2 () {
 142         test_create_repo break-detection-2 &&
 143         (
 144                 cd break-detection-2 &&
 145
 146                 printf "1\n2\n3\n4\n5\n" >a &&
 147                 echo foo >b &&
 148                 git add a b &&
 149                 git commit -m A &&
 150                 git tag A &&
 151
 152                 git checkout -b D A &&
 153                 echo 7 >>a &&
 154                 git add a &&
 155                 git mv a c &&
 156                 echo "Completely different content" >a &&
 157                 git add a &&
 158                 git commit -m D &&
 159
 160                 git checkout -b E A &&
 161                 git rm a &&
 162                 echo "Completely different content" >>a &&
 163                 git add a &&
 164                 git commit -m E
 165         )
 166 }
 167
 168 test_expect_failure 'missed conflict if rename not detected' '
 169         test_setup_break_detection_2 &&
 170         (
 171                 cd break-detection-2 &&
 172
 173                 git checkout -q E^0 &&
 174                 test_must_fail git merge -s recursive D^0
 175         )
 176 '
 177
 178 # Tests for undetected rename/add-source causing a file to erroneously be
 179 # deleted (and for mishandled rename/rename(1to1) causing the same issue).
 180 #
 181 # This test uses a rename/rename(1to1)+add-source conflict (1to1 means the
 182 # same file is renamed on both sides to the same thing; it should trigger
 183 # the 1to2 logic, which it would do if the add-source didn't cause issues
 184 # for git's rename detection):
 185 #   Commit A: new file: a
 186 #   Commit B: rename a->b
 187 #   Commit C: rename a->b, add unrelated a
 188
 189 test_setup_break_detection_3 () {
 190         test_create_repo break-detection-3 &&
 191         (
 192                 cd break-detection-3 &&
 193
 194                 printf "1\n2\n3\n4\n5\n" >a &&
 195                 git add a &&
 196                 git commit -m A &&
 197                 git tag A &&
 198
 199                 git checkout -b B A &&
 200                 git mv a b &&
 201                 git commit -m B &&
 202
 203                 git checkout -b C A &&
 204                 git mv a b &&
 205                 echo foobar >a &&
 206                 git add a &&
 207                 git commit -m C
 208         )
 209 }
 210
 211 test_expect_failure 'detect rename/add-source and preserve all data' '
 212         test_setup_break_detection_3 &&
 213         (
 214                 cd break-detection-3 &&
 215
 216                 git checkout B^0 &&
 217
 218                 git merge -s recursive C^0 &&
 219
 220                 git ls-files -s >out &&
 221                 test_line_count = 2 out &&
 222                 git ls-files -u >out &&
 223                 test_line_count = 2 out &&
 224                 git ls-files -o >out &&
 225                 test_line_count = 1 out &&
 226
 227                 test_path_is_file a &&
 228                 test_path_is_file b &&
 229
 230                 git rev-parse >expect \
 231                         A:a   C:a     &&
 232                 git rev-parse >actual \
 233                         :0:b  :0:a    &&
 234                 test_cmp expect actual
 235         )
 236 '
 237
 238 test_expect_failure 'detect rename/add-source and preserve all data, merge other way' '
 239         test_setup_break_detection_3 &&
 240         (
 241                 cd break-detection-3 &&
 242
 243                 git checkout C^0 &&
 244
 245                 git merge -s recursive B^0 &&
 246
 247                 git ls-files -s >out &&
 248                 test_line_count = 2 out &&
 249                 git ls-files -u >out &&
 250                 test_line_count = 2 out &&
 251                 git ls-files -o >out &&
 252                 test_line_count = 1 out &&
 253
 254                 test_path_is_file a &&
 255                 test_path_is_file b &&
 256
 257                 git rev-parse >expect \
 258                         A:a   C:a     &&
 259                 git rev-parse >actual \
 260                         :0:b  :0:a    &&
 261                 test_cmp expect actual
 262         )
 263 '
 264
 265 test_setup_rename_directory () {
 266         test_create_repo rename-directory-$1 &&
 267         (
 268                 cd rename-directory-$1 &&
 269
 270                 printf "1\n2\n3\n4\n5\n6\n" >file &&
 271                 git add file &&
 272                 test_tick &&
 273                 git commit -m base &&
 274                 git tag base &&
 275
 276                 git checkout -b right &&
 277                 echo 7 >>file &&
 278                 mkdir newfile &&
 279                 echo junk >newfile/realfile &&
 280                 git add file newfile/realfile &&
 281                 test_tick &&
 282                 git commit -m right &&
 283
 284                 git checkout -b left-conflict base &&
 285                 echo 8 >>file &&
 286                 git add file &&
 287                 git mv file newfile &&
 288                 test_tick &&
 289                 git commit -m left &&
 290
 291                 git checkout -b left-clean base &&
 292                 echo 0 >newfile &&
 293                 cat file >>newfile &&
 294                 git add newfile &&
 295                 git rm file &&
 296                 test_tick &&
 297                 git commit -m left
 298         )
 299 }
 300
 301 test_expect_success 'rename/directory conflict + clean content merge' '
 302         test_setup_rename_directory 1a &&
 303         (
 304                 cd rename-directory-1a &&
 305
 306                 git checkout left-clean^0 &&
 307
 308                 test_must_fail git merge -s recursive right^0 &&
 309
 310                 git ls-files -s >out &&
 311                 test_line_count = 2 out &&
 312                 git ls-files -u >out &&
 313                 test_line_count = 1 out &&
 314                 git ls-files -o >out &&
 315                 test_line_count = 2 out &&
 316
 317                 echo 0 >expect &&
 318                 git cat-file -p base:file >>expect &&
 319                 echo 7 >>expect &&
 320                 test_cmp expect newfile~HEAD &&
 321
 322                 test $(git rev-parse :2:newfile) = $(git hash-object expect) &&
 323
 324                 test_path_is_file newfile/realfile &&
 325                 test_path_is_file newfile~HEAD
 326         )
 327 '
 328
 329 test_expect_success 'rename/directory conflict + content merge conflict' '
 330         test_setup_rename_directory 1b &&
 331         (
 332                 cd rename-directory-1b &&
 333
 334                 git reset --hard &&
 335                 git clean -fdqx &&
 336
 337                 git checkout left-conflict^0 &&
 338
 339                 test_must_fail git merge -s recursive right^0 &&
 340
 341                 git ls-files -s >out &&
 342                 test_line_count = 4 out &&
 343                 git ls-files -u >out &&
 344                 test_line_count = 3 out &&
 345                 git ls-files -o >out &&
 346                 test_line_count = 2 out &&
 347
 348                 git cat-file -p left-conflict:newfile >left &&
 349                 git cat-file -p base:file    >base &&
 350                 git cat-file -p right:file   >right &&
 351                 test_must_fail git merge-file \
 352                         -L "HEAD:newfile" \
 353                         -L "" \
 354                         -L "right^0:file" \
 355                         left base right &&
 356                 test_cmp left newfile~HEAD &&
 357
 358                 git rev-parse >expect                                 \
 359                         base:file   left-conflict:newfile  right:file &&
 360                 git rev-parse >actual                                 \
 361                         :1:newfile  :2:newfile             :3:newfile &&
 362                 test_cmp expect actual &&
 363
 364                 test_path_is_file newfile/realfile &&
 365                 test_path_is_file newfile~HEAD
 366         )
 367 '
 368
 369 test_setup_rename_directory_2 () {
 370         test_create_repo rename-directory-2 &&
 371         (
 372                 cd rename-directory-2 &&
 373
 374                 mkdir sub &&
 375                 printf "1\n2\n3\n4\n5\n6\n" >sub/file &&
 376                 git add sub/file &&
 377                 test_tick &&
 378                 git commit -m base &&
 379                 git tag base &&
 380
 381                 git checkout -b right &&
 382                 echo 7 >>sub/file &&
 383                 git add sub/file &&
 384                 test_tick &&
 385                 git commit -m right &&
 386
 387                 git checkout -b left base &&
 388                 echo 0 >newfile &&
 389                 cat sub/file >>newfile &&
 390                 git rm sub/file &&
 391                 mv newfile sub &&
 392                 git add sub &&
 393                 test_tick &&
 394                 git commit -m left
 395         )
 396 }
 397
 398 test_expect_success 'disappearing dir in rename/directory conflict handled' '
 399         test_setup_rename_directory_2 &&
 400         (
 401                 cd rename-directory-2 &&
 402
 403                 git checkout left^0 &&
 404
 405                 git merge -s recursive right^0 &&
 406
 407                 git ls-files -s >out &&
 408                 test_line_count = 1 out &&
 409                 git ls-files -u >out &&
 410                 test_line_count = 0 out &&
 411                 git ls-files -o >out &&
 412                 test_line_count = 1 out &&
 413
 414                 echo 0 >expect &&
 415                 git cat-file -p base:sub/file >>expect &&
 416                 echo 7 >>expect &&
 417                 test_cmp expect sub &&
 418
 419                 test_path_is_file sub
 420         )
 421 '
 422
 423 # Test for basic rename/add-dest conflict, with rename needing content merge:
 424 #   Commit O: a
 425 #   Commit A: rename a->b, modifying b too
 426 #   Commit B: modify a, add different b
 427
 428 test_setup_rename_with_content_merge_and_add () {
 429         test_create_repo rename-with-content-merge-and-add-$1 &&
 430         (
 431                 cd rename-with-content-merge-and-add-$1 &&
 432
 433                 test_seq 1 5 >a &&
 434                 git add a &&
 435                 git commit -m O &&
 436                 git tag O &&
 437
 438                 git checkout -b A O &&
 439                 git mv a b &&
 440                 test_seq 0 5 >b &&
 441                 git add b &&
 442                 git commit -m A &&
 443
 444                 git checkout -b B O &&
 445                 echo 6 >>a &&
 446                 echo hello world >b &&
 447                 git add a b &&
 448                 git commit -m B
 449         )
 450 }
 451
 452 test_expect_success 'handle rename-with-content-merge vs. add' '
 453         test_setup_rename_with_content_merge_and_add AB &&
 454         (
 455                 cd rename-with-content-merge-and-add-AB &&
 456
 457                 git checkout A^0 &&
 458
 459                 test_must_fail git merge -s recursive B^0 >out &&
 460                 test_i18ngrep "CONFLICT (rename/add)" out &&
 461
 462                 git ls-files -s >out &&
 463                 test_line_count = 2 out &&
 464                 git ls-files -u >out &&
 465                 test_line_count = 2 out &&
 466                 # Also, make sure both unmerged entries are for "b"
 467                 git ls-files -u b >out &&
 468                 test_line_count = 2 out &&
 469                 git ls-files -o >out &&
 470                 test_line_count = 1 out &&
 471
 472                 test_path_is_missing a &&
 473                 test_path_is_file b &&
 474
 475                 test_seq 0 6 >tmp &&
 476                 git hash-object tmp >expect &&
 477                 git rev-parse B:b >>expect &&
 478                 git rev-parse >actual  \
 479                         :2:b    :3:b   &&
 480                 test_cmp expect actual &&
 481
 482                 # Test that the two-way merge in b is as expected
 483                 git cat-file -p :2:b >>ours &&
 484                 git cat-file -p :3:b >>theirs &&
 485                 >empty &&
 486                 test_must_fail git merge-file \
 487                         -L "HEAD" \
 488                         -L "" \
 489                         -L "B^0" \
 490                         ours empty theirs &&
 491                 test_cmp ours b
 492         )
 493 '
 494
 495 test_expect_success 'handle rename-with-content-merge vs. add, merge other way' '
 496         test_setup_rename_with_content_merge_and_add BA &&
 497         (
 498                 cd rename-with-content-merge-and-add-BA &&
 499
 500                 git reset --hard &&
 501                 git clean -fdx &&
 502
 503                 git checkout B^0 &&
 504
 505                 test_must_fail git merge -s recursive A^0 >out &&
 506                 test_i18ngrep "CONFLICT (rename/add)" out &&
 507
 508                 git ls-files -s >out &&
 509                 test_line_count = 2 out &&
 510                 git ls-files -u >out &&
 511                 test_line_count = 2 out &&
 512                 # Also, make sure both unmerged entries are for "b"
 513                 git ls-files -u b >out &&
 514                 test_line_count = 2 out &&
 515                 git ls-files -o >out &&
 516                 test_line_count = 1 out &&
 517
 518                 test_path_is_missing a &&
 519                 test_path_is_file b &&
 520
 521                 test_seq 0 6 >tmp &&
 522                 git rev-parse B:b >expect &&
 523                 git hash-object tmp >>expect &&
 524                 git rev-parse >actual  \
 525                         :2:b    :3:b   &&
 526                 test_cmp expect actual &&
 527
 528                 # Test that the two-way merge in b is as expected
 529                 git cat-file -p :2:b >>ours &&
 530                 git cat-file -p :3:b >>theirs &&
 531                 >empty &&
 532                 test_must_fail git merge-file \
 533                         -L "HEAD" \
 534                         -L "" \
 535                         -L "A^0" \
 536                         ours empty theirs &&
 537                 test_cmp ours b
 538         )
 539 '
 540
 541 # Test for all kinds of things that can go wrong with rename/rename (2to1):
 542 #   Commit A: new files: a & b
 543 #   Commit B: rename a->c, modify b
 544 #   Commit C: rename b->c, modify a
 545 #
 546 # Merging of B & C should NOT be clean.  Questions:
 547 #   * Both a & b should be removed by the merge; are they?
 548 #   * The two c's should contain modifications to a & b; do they?
 549 #   * The index should contain two files, both for c; does it?
 550 #   * The working copy should have two files, both of form c~<unique>; does it?
 551 #   * Nothing else should be present.  Is anything?
 552
 553 test_setup_rename_rename_2to1 () {
 554         test_create_repo rename-rename-2to1 &&
 555         (
 556                 cd rename-rename-2to1 &&
 557
 558                 printf "1\n2\n3\n4\n5\n" >a &&
 559                 printf "5\n4\n3\n2\n1\n" >b &&
 560                 git add a b &&
 561                 git commit -m A &&
 562                 git tag A &&
 563
 564                 git checkout -b B A &&
 565                 git mv a c &&
 566                 echo 0 >>b &&
 567                 git add b &&
 568                 git commit -m B &&
 569
 570                 git checkout -b C A &&
 571                 git mv b c &&
 572                 echo 6 >>a &&
 573                 git add a &&
 574                 git commit -m C
 575         )
 576 }
 577
 578 test_expect_success 'handle rename/rename (2to1) conflict correctly' '
 579         test_setup_rename_rename_2to1 &&
 580         (
 581                 cd rename-rename-2to1 &&
 582
 583                 git checkout B^0 &&
 584
 585                 test_must_fail git merge -s recursive C^0 >out &&
 586                 test_i18ngrep "CONFLICT (rename/rename)" out &&
 587
 588                 git ls-files -s >out &&
 589                 test_line_count = 2 out &&
 590                 git ls-files -u >out &&
 591                 test_line_count = 2 out &&
 592                 git ls-files -u c >out &&
 593                 test_line_count = 2 out &&
 594                 git ls-files -o >out &&
 595                 test_line_count = 1 out &&
 596
 597                 test_path_is_missing a &&
 598                 test_path_is_missing b &&
 599
 600                 git rev-parse >expect  \
 601                         C:a     B:b    &&
 602                 git rev-parse >actual  \
 603                         :2:c    :3:c   &&
 604                 test_cmp expect actual &&
 605
 606                 # Test that the two-way merge in new_a is as expected
 607                 git cat-file -p :2:c >>ours &&
 608                 git cat-file -p :3:c >>theirs &&
 609                 >empty &&
 610                 test_must_fail git merge-file \
 611                         -L "HEAD" \
 612                         -L "" \
 613                         -L "C^0" \
 614                         ours empty theirs &&
 615                 git hash-object c >actual &&
 616                 git hash-object ours >expect &&
 617                 test_cmp expect actual
 618         )
 619 '
 620
 621 # Testcase setup for simple rename/rename (1to2) conflict:
 622 #   Commit A: new file: a
 623 #   Commit B: rename a->b
 624 #   Commit C: rename a->c
 625 test_setup_rename_rename_1to2 () {
 626         test_create_repo rename-rename-1to2 &&
 627         (
 628                 cd rename-rename-1to2 &&
 629
 630                 echo stuff >a &&
 631                 git add a &&
 632                 test_tick &&
 633                 git commit -m A &&
 634                 git tag A &&
 635
 636                 git checkout -b B A &&
 637                 git mv a b &&
 638                 test_tick &&
 639                 git commit -m B &&
 640
 641                 git checkout -b C A &&
 642                 git mv a c &&
 643                 test_tick &&
 644                 git commit -m C
 645         )
 646 }
 647
 648 test_expect_success 'merge has correct working tree contents' '
 649         test_setup_rename_rename_1to2 &&
 650         (
 651                 cd rename-rename-1to2 &&
 652
 653                 git checkout C^0 &&
 654
 655                 test_must_fail git merge -s recursive B^0 &&
 656
 657                 git ls-files -s >out &&
 658                 test_line_count = 3 out &&
 659                 git ls-files -u >out &&
 660                 test_line_count = 3 out &&
 661                 git ls-files -o >out &&
 662                 test_line_count = 1 out &&
 663
 664                 test_path_is_missing a &&
 665                 git rev-parse >expect   \
 666                         A:a   A:a   A:a \
 667                         A:a   A:a       &&
 668                 git rev-parse >actual    \
 669                         :1:a  :3:b  :2:c &&
 670                 git hash-object >>actual \
 671                         b     c          &&
 672                 test_cmp expect actual
 673         )
 674 '
 675
 676 # Testcase setup for rename/rename(1to2)/add-source conflict:
 677 #   Commit A: new file: a
 678 #   Commit B: rename a->b
 679 #   Commit C: rename a->c, add completely different a
 680 #
 681 # Merging of B & C should NOT be clean; there's a rename/rename conflict
 682
 683 test_setup_rename_rename_1to2_add_source_1 () {
 684         test_create_repo rename-rename-1to2-add-source-1 &&
 685         (
 686                 cd rename-rename-1to2-add-source-1 &&
 687
 688                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
 689                 git add a &&
 690                 git commit -m A &&
 691                 git tag A &&
 692
 693                 git checkout -b B A &&
 694                 git mv a b &&
 695                 git commit -m B &&
 696
 697                 git checkout -b C A &&
 698                 git mv a c &&
 699                 echo something completely different >a &&
 700                 git add a &&
 701                 git commit -m C
 702         )
 703 }
 704
 705 test_expect_failure 'detect conflict with rename/rename(1to2)/add-source merge' '
 706         test_setup_rename_rename_1to2_add_source_1 &&
 707         (
 708                 cd rename-rename-1to2-add-source-1 &&
 709
 710                 git checkout B^0 &&
 711
 712                 test_must_fail git merge -s recursive C^0 &&
 713
 714                 git ls-files -s >out &&
 715                 test_line_count = 4 out &&
 716                 git ls-files -o >out &&
 717                 test_line_count = 1 out &&
 718
 719                 git rev-parse >expect         \
 720                         C:a   A:a   B:b   C:C &&
 721                 git rev-parse >actual          \
 722                         :3:a  :1:a  :2:b  :3:c &&
 723                 test_cmp expect actual &&
 724
 725                 test_path_is_file a &&
 726                 test_path_is_file b &&
 727                 test_path_is_file c
 728         )
 729 '
 730
 731 test_setup_rename_rename_1to2_add_source_2 () {
 732         test_create_repo rename-rename-1to2-add-source-2 &&
 733         (
 734                 cd rename-rename-1to2-add-source-2 &&
 735
 736                 >a &&
 737                 git add a &&
 738                 test_tick &&
 739                 git commit -m base &&
 740                 git tag A &&
 741
 742                 git checkout -b B A &&
 743                 git mv a b &&
 744                 test_tick &&
 745                 git commit -m one &&
 746
 747                 git checkout -b C A &&
 748                 git mv a b &&
 749                 echo important-info >a &&
 750                 git add a &&
 751                 test_tick &&
 752                 git commit -m two
 753         )
 754 }
 755
 756 test_expect_failure 'rename/rename/add-source still tracks new a file' '
 757         test_setup_rename_rename_1to2_add_source_2 &&
 758         (
 759                 cd rename-rename-1to2-add-source-2 &&
 760
 761                 git checkout C^0 &&
 762                 git merge -s recursive B^0 &&
 763
 764                 git ls-files -s >out &&
 765                 test_line_count = 2 out &&
 766                 git ls-files -o >out &&
 767                 test_line_count = 1 out &&
 768
 769                 git rev-parse >expect \
 770                         C:a   A:a     &&
 771                 git rev-parse >actual \
 772                         :0:a  :0:b    &&
 773                 test_cmp expect actual
 774         )
 775 '
 776
 777 test_setup_rename_rename_1to2_add_dest () {
 778         test_create_repo rename-rename-1to2-add-dest &&
 779         (
 780                 cd rename-rename-1to2-add-dest &&
 781
 782                 echo stuff >a &&
 783                 git add a &&
 784                 test_tick &&
 785                 git commit -m base &&
 786                 git tag A &&
 787
 788                 git checkout -b B A &&
 789                 git mv a b &&
 790                 echo precious-data >c &&
 791                 git add c &&
 792                 test_tick &&
 793                 git commit -m one &&
 794
 795                 git checkout -b C A &&
 796                 git mv a c &&
 797                 echo important-info >b &&
 798                 git add b &&
 799                 test_tick &&
 800                 git commit -m two
 801         )
 802 }
 803
 804 test_expect_success 'rename/rename/add-dest merge still knows about conflicting file versions' '
 805         test_setup_rename_rename_1to2_add_dest &&
 806         (
 807                 cd rename-rename-1to2-add-dest &&
 808
 809                 git checkout C^0 &&
 810                 test_must_fail git merge -s recursive B^0 &&
 811
 812                 git ls-files -s >out &&
 813                 test_line_count = 5 out &&
 814                 git ls-files -u b >out &&
 815                 test_line_count = 2 out &&
 816                 git ls-files -u c >out &&
 817                 test_line_count = 2 out &&
 818                 git ls-files -o >out &&
 819                 test_line_count = 1 out &&
 820
 821                 git rev-parse >expect               \
 822                         A:a   C:b   B:b   C:c   B:c &&
 823                 git rev-parse >actual                \
 824                         :1:a  :2:b  :3:b  :2:c  :3:c &&
 825                 test_cmp expect actual &&
 826
 827                 # Record some contents for re-doing merges
 828                 git cat-file -p A:a >stuff &&
 829                 git cat-file -p C:b >important_info &&
 830                 git cat-file -p B:c >precious_data &&
 831                 >empty &&
 832
 833                 # Test the merge in b
 834                 test_must_fail git merge-file \
 835                         -L "HEAD" \
 836                         -L "" \
 837                         -L "B^0" \
 838                         important_info empty stuff &&
 839                 test_cmp important_info b &&
 840
 841                 # Test the merge in c
 842                 test_must_fail git merge-file \
 843                         -L "HEAD" \
 844                         -L "" \
 845                         -L "B^0" \
 846                         stuff empty precious_data &&
 847                 test_cmp stuff c
 848         )
 849 '
 850
 851 # Testcase rad, rename/add/delete
 852 #   Commit O: foo
 853 #   Commit A: rm foo, add different bar
 854 #   Commit B: rename foo->bar
 855 #   Expected: CONFLICT (rename/add/delete), two-way merged bar
 856
 857 test_setup_rad () {
 858         test_create_repo rad &&
 859         (
 860                 cd rad &&
 861                 echo "original file" >foo &&
 862                 git add foo &&
 863                 git commit -m "original" &&
 864
 865                 git branch O &&
 866                 git branch A &&
 867                 git branch B &&
 868
 869                 git checkout A &&
 870                 git rm foo &&
 871                 echo "different file" >bar &&
 872                 git add bar &&
 873                 git commit -m "Remove foo, add bar" &&
 874
 875                 git checkout B &&
 876                 git mv foo bar &&
 877                 git commit -m "rename foo to bar"
 878         )
 879 }
 880
 881 test_expect_failure 'rad-check: rename/add/delete conflict' '
 882         test_setup_rad &&
 883         (
 884                 cd rad &&
 885
 886                 git checkout B^0 &&
 887                 test_must_fail git merge -s recursive A^0 >out 2>err &&
 888
 889                 # Not sure whether the output should contain just one
 890                 # "CONFLICT (rename/add/delete)" line, or if it should break
 891                 # it into a pair of "CONFLICT (rename/delete)" and
 892                 # "CONFLICT (rename/add)"; allow for either.
 893                 test_i18ngrep "CONFLICT (rename.*add)" out &&
 894                 test_i18ngrep "CONFLICT (rename.*delete)" out &&
 895                 test_must_be_empty err &&
 896
 897                 git ls-files -s >file_count &&
 898                 test_line_count = 2 file_count &&
 899                 git ls-files -u >file_count &&
 900                 test_line_count = 2 file_count &&
 901                 git ls-files -o >file_count &&
 902                 test_line_count = 2 file_count &&
 903
 904                 git rev-parse >actual \
 905                         :2:bar :3:bar &&
 906                 git rev-parse >expect \
 907                         B:bar  A:bar  &&
 908
 909                 test_cmp file_is_missing foo &&
 910                 # bar should have two-way merged contents of the different
 911                 # versions of bar; check that content from both sides is
 912                 # present.
 913                 grep original bar &&
 914                 grep different bar
 915         )
 916 '
 917
 918 # Testcase rrdd, rename/rename(2to1)/delete/delete
 919 #   Commit O: foo, bar
 920 #   Commit A: rename foo->baz, rm bar
 921 #   Commit B: rename bar->baz, rm foo
 922 #   Expected: CONFLICT (rename/rename/delete/delete), two-way merged baz
 923
 924 test_setup_rrdd () {
 925         test_create_repo rrdd &&
 926         (
 927                 cd rrdd &&
 928                 echo foo >foo &&
 929                 echo bar >bar &&
 930                 git add foo bar &&
 931                 git commit -m O &&
 932
 933                 git branch O &&
 934                 git branch A &&
 935                 git branch B &&
 936
 937                 git checkout A &&
 938                 git mv foo baz &&
 939                 git rm bar &&
 940                 git commit -m "Rename foo, remove bar" &&
 941
 942                 git checkout B &&
 943                 git mv bar baz &&
 944                 git rm foo &&
 945                 git commit -m "Rename bar, remove foo"
 946         )
 947 }
 948
 949 test_expect_failure 'rrdd-check: rename/rename(2to1)/delete/delete conflict' '
 950         test_setup_rrdd &&
 951         (
 952                 cd rrdd &&
 953
 954                 git checkout A^0 &&
 955                 test_must_fail git merge -s recursive B^0 >out 2>err &&
 956
 957                 # Not sure whether the output should contain just one
 958                 # "CONFLICT (rename/rename/delete/delete)" line, or if it
 959                 # should break it into three: "CONFLICT (rename/rename)" and
 960                 # two "CONFLICT (rename/delete)" lines; allow for either.
 961                 test_i18ngrep "CONFLICT (rename/rename)" out &&
 962                 test_i18ngrep "CONFLICT (rename.*delete)" out &&
 963                 test_must_be_empty err &&
 964
 965                 git ls-files -s >file_count &&
 966                 test_line_count = 2 file_count &&
 967                 git ls-files -u >file_count &&
 968                 test_line_count = 2 file_count &&
 969                 git ls-files -o >file_count &&
 970                 test_line_count = 2 file_count &&
 971
 972                 git rev-parse >actual \
 973                         :2:baz :3:baz &&
 974                 git rev-parse >expect \
 975                         O:foo  O:bar  &&
 976
 977                 test_cmp file_is_missing foo &&
 978                 test_cmp file_is_missing bar &&
 979                 # baz should have two-way merged contents of the original
 980                 # contents of foo and bar; check that content from both sides
 981                 # is present.
 982                 grep foo baz &&
 983                 grep bar baz
 984         )
 985 '
 986
 987 # Testcase mod6, chains of rename/rename(1to2) and rename/rename(2to1)
 988 #   Commit O: one,      three,       five
 989 #   Commit A: one->two, three->four, five->six
 990 #   Commit B: one->six, three->two,  five->four
 991 #   Expected: six CONFLICT(rename/rename) messages, each path in two of the
 992 #             multi-way merged contents found in two, four, six
 993
 994 test_setup_mod6 () {
 995         test_create_repo mod6 &&
 996         (
 997                 cd mod6 &&
 998                 test_seq 11 19 >one &&
 999                 test_seq 31 39 >three &&
1000                 test_seq 51 59 >five &&
1001                 git add . &&
1002                 test_tick &&
1003                 git commit -m "O" &&
1004
1005                 git branch O &&
1006                 git branch A &&
1007                 git branch B &&
1008
1009                 git checkout A &&
1010                 test_seq 10 19 >one &&
1011                 echo 40        >>three &&
1012                 git add one three &&
1013                 git mv  one   two  &&
1014                 git mv  three four &&
1015                 git mv  five  six  &&
1016                 test_tick &&
1017                 git commit -m "A" &&
1018
1019                 git checkout B &&
1020                 echo 20    >>one       &&
1021                 echo forty >>three     &&
1022                 echo 60    >>five      &&
1023                 git add one three five &&
1024                 git mv  one   six  &&
1025                 git mv  three two  &&
1026                 git mv  five  four &&
1027                 test_tick &&
1028                 git commit -m "B"
1029         )
1030 }
1031
1032 test_expect_failure 'mod6-check: chains of rename/rename(1to2) and rename/rename(2to1)' '
1033         test_setup_mod6 &&
1034         (
1035                 cd mod6 &&
1036
1037                 git checkout A^0 &&
1038
1039                 test_must_fail git merge -s recursive B^0 >out 2>err &&
1040
1041                 test_i18ngrep "CONFLICT (rename/rename)" out &&
1042                 test_must_be_empty err &&
1043
1044                 git ls-files -s >file_count &&
1045                 test_line_count = 6 file_count &&
1046                 git ls-files -u >file_count &&
1047                 test_line_count = 6 file_count &&
1048                 git ls-files -o >file_count &&
1049                 test_line_count = 3 file_count &&
1050
1051                 test_seq 10 20 >merged-one &&
1052                 test_seq 51 60 >merged-five &&
1053                 # Determine what the merge of three would give us.
1054                 test_seq 30 40 >three-side-A &&
1055                 test_seq 31 39 >three-side-B &&
1056                 echo forty >three-side-B &&
1057                 >empty &&
1058                 test_must_fail git merge-file \
1059                         -L "HEAD" \
1060                         -L "" \
1061                         -L "B^0" \
1062                         three-side-A empty three-side-B &&
1063                 sed -e "s/^\([<=>]\)/\1\1\1/" three-side-A >merged-three &&
1064
1065                 # Verify the index is as expected
1066                 git rev-parse >actual         \
1067                         :2:two       :3:two   \
1068                         :2:four      :3:four  \
1069                         :2:six       :3:six   &&
1070                 git hash-object >expect           \
1071                         merged-one   merged-three \
1072                         merged-three merged-five  \
1073                         merged-five  merged-one   &&
1074                 test_cmp expect actual &&
1075
1076                 git cat-file -p :2:two >expect &&
1077                 git cat-file -p :3:two >other &&
1078                 test_must_fail git merge-file    \
1079                         -L "HEAD"  -L ""  -L "B^0" \
1080                         expect     empty  other &&
1081                 test_cmp expect two &&
1082
1083                 git cat-file -p :2:four >expect &&
1084                 git cat-file -p :3:four >other &&
1085                 test_must_fail git merge-file    \
1086                         -L "HEAD"  -L ""  -L "B^0" \
1087                         expect     empty  other &&
1088                 test_cmp expect four &&
1089
1090                 git cat-file -p :2:six >expect &&
1091                 git cat-file -p :3:six >other &&
1092                 test_must_fail git merge-file    \
1093                         -L "HEAD"  -L ""  -L "B^0" \
1094                         expect     empty  other &&
1095                 test_cmp expect six
1096         )
1097 '
1098
1099 test_conflicts_with_adds_and_renames() {
1100         sideL=$1
1101         sideR=$2
1102
1103         # Setup:
1104         #          L
1105         #         / \
1106         #   master   ?
1107         #         \ /
1108         #          R
1109         #
1110         # Where:
1111         #   Both L and R have files named 'three' which collide.  Each of
1112         #   the colliding files could have been involved in a rename, in
1113         #   which case there was a file named 'one' or 'two' that was
1114         #   modified on the opposite side of history and renamed into the
1115         #   collision on this side of history.
1116         #
1117         # Questions:
1118         #   1) The index should contain both a stage 2 and stage 3 entry
1119         #      for the colliding file.  Does it?
1120         #   2) When renames are involved, the content merges are clean, so
1121         #      the index should reflect the content merges, not merely the
1122         #      version of the colliding file from the prior commit.  Does
1123         #      it?
1124         #   3) There should be a file in the worktree named 'three'
1125         #      containing the two-way merged contents of the content-merged
1126         #      versions of 'three' from each of the two colliding
1127         #      files.  Is it present?
1128         #   4) There should not be any three~* files in the working
1129         #      tree
1130         test_setup_collision_conflict () {
1131         #test_expect_success "setup simple $sideL/$sideR conflict" '
1132                 test_create_repo simple_${sideL}_${sideR} &&
1133                 (
1134                         cd simple_${sideL}_${sideR} &&
1135
1136                         # Create some related files now
1137                         for i in $(test_seq 1 10)
1138                         do
1139                                 echo Random base content line $i
1140                         done >file_v1 &&
1141                         cp file_v1 file_v2 &&
1142                         echo modification >>file_v2 &&
1143
1144                         cp file_v1 file_v3 &&
1145                         echo more stuff >>file_v3 &&
1146                         cp file_v3 file_v4 &&
1147                         echo yet more stuff >>file_v4 &&
1148
1149                         # Use a tag to record both these files for simple
1150                         # access, and clean out these untracked files
1151                         git tag file_v1 $(git hash-object -w file_v1) &&
1152                         git tag file_v2 $(git hash-object -w file_v2) &&
1153                         git tag file_v3 $(git hash-object -w file_v3) &&
1154                         git tag file_v4 $(git hash-object -w file_v4) &&
1155                         git clean -f &&
1156
1157                         # Setup original commit (or merge-base), consisting of
1158                         # files named "one" and "two" if renames were involved.
1159                         touch irrelevant_file &&
1160                         git add irrelevant_file &&
1161                         if [ $sideL = "rename" ]
1162                         then
1163                                 git show file_v1 >one &&
1164                                 git add one
1165                         fi &&
1166                         if [ $sideR = "rename" ]
1167                         then
1168                                 git show file_v3 >two &&
1169                                 git add two
1170                         fi &&
1171                         test_tick && git commit -m initial &&
1172
1173                         git branch L &&
1174                         git branch R &&
1175
1176                         # Handle the left side
1177                         git checkout L &&
1178                         if [ $sideL = "rename" ]
1179                         then
1180                                 git mv one three
1181                         else
1182                                 git show file_v2 >three &&
1183                                 git add three
1184                         fi &&
1185                         if [ $sideR = "rename" ]
1186                         then
1187                                 git show file_v4 >two &&
1188                                 git add two
1189                         fi &&
1190                         test_tick && git commit -m L &&
1191
1192                         # Handle the right side
1193                         git checkout R &&
1194                         if [ $sideL = "rename" ]
1195                         then
1196                                 git show file_v2 >one &&
1197                                 git add one
1198                         fi &&
1199                         if [ $sideR = "rename" ]
1200                         then
1201                                 git mv two three
1202                         else
1203                                 git show file_v4 >three &&
1204                                 git add three
1205                         fi &&
1206                         test_tick && git commit -m R
1207                 )
1208         #'
1209         }
1210
1211         test_expect_success "check simple $sideL/$sideR conflict" '
1212                 test_setup_collision_conflict &&
1213                 (
1214                         cd simple_${sideL}_${sideR} &&
1215
1216                         git checkout L^0 &&
1217
1218                         # Merge must fail; there is a conflict
1219                         test_must_fail git merge -s recursive R^0 &&
1220
1221                         # Make sure the index has the right number of entries
1222                         git ls-files -s >out &&
1223                         test_line_count = 3 out &&
1224                         git ls-files -u >out &&
1225                         test_line_count = 2 out &&
1226                         # Ensure we have the correct number of untracked files
1227                         git ls-files -o >out &&
1228                         test_line_count = 1 out &&
1229
1230                         # Nothing should have touched irrelevant_file
1231                         git rev-parse >actual      \
1232                                 :0:irrelevant_file \
1233                                 :2:three           \
1234                                 :3:three           &&
1235                         git rev-parse >expected        \
1236                                 master:irrelevant_file \
1237                                 file_v2                \
1238                                 file_v4                &&
1239                         test_cmp expected actual &&
1240
1241                         # Make sure we have the correct merged contents for
1242                         # three
1243                         git show file_v1 >expected &&
1244                         cat <<-\EOF >>expected &&
1245                         <<<<<<< HEAD
1246                         modification
1247                         =======
1248                         more stuff
1249                         yet more stuff
1250                         >>>>>>> R^0
1251                         EOF
1252
1253                         test_cmp expected three
1254                 )
1255         '
1256 }
1257
1258 test_conflicts_with_adds_and_renames rename rename
1259 test_conflicts_with_adds_and_renames rename add
1260 test_conflicts_with_adds_and_renames add    rename
1261 test_conflicts_with_adds_and_renames add    add
1262
1263 # Setup:
1264 #          L
1265 #         / \
1266 #   master   ?
1267 #         \ /
1268 #          R
1269 #
1270 # Where:
1271 #   master has two files, named 'one' and 'two'.
1272 #   branches L and R both modify 'one', in conflicting ways.
1273 #   branches L and R both modify 'two', in conflicting ways.
1274 #   branch L also renames 'one' to 'three'.
1275 #   branch R also renames 'two' to 'three'.
1276 #
1277 #   So, we have four different conflicting files that all end up at path
1278 #   'three'.
1279 test_setup_nested_conflicts_from_rename_rename () {
1280         test_create_repo nested_conflicts_from_rename_rename &&
1281         (
1282                 cd nested_conflicts_from_rename_rename &&
1283
1284                 # Create some related files now
1285                 for i in $(test_seq 1 10)
1286                 do
1287                         echo Random base content line $i
1288                 done >file_v1 &&
1289
1290                 cp file_v1 file_v2 &&
1291                 cp file_v1 file_v3 &&
1292                 cp file_v1 file_v4 &&
1293                 cp file_v1 file_v5 &&
1294                 cp file_v1 file_v6 &&
1295
1296                 echo one  >>file_v1 &&
1297                 echo uno  >>file_v2 &&
1298                 echo eins >>file_v3 &&
1299
1300                 echo two  >>file_v4 &&
1301                 echo dos  >>file_v5 &&
1302                 echo zwei >>file_v6 &&
1303
1304                 # Setup original commit (or merge-base), consisting of
1305                 # files named "one" and "two".
1306                 mv file_v1 one &&
1307                 mv file_v4 two &&
1308                 git add one two &&
1309                 test_tick && git commit -m english &&
1310
1311                 git branch L &&
1312                 git branch R &&
1313
1314                 # Handle the left side
1315                 git checkout L &&
1316                 git rm one two &&
1317                 mv -f file_v2 three &&
1318                 mv -f file_v5 two &&
1319                 git add two three &&
1320                 test_tick && git commit -m spanish &&
1321
1322                 # Handle the right side
1323                 git checkout R &&
1324                 git rm one two &&
1325                 mv -f file_v3 one &&
1326                 mv -f file_v6 three &&
1327                 git add one three &&
1328                 test_tick && git commit -m german
1329         )
1330 }
1331
1332 test_expect_success 'check nested conflicts from rename/rename(2to1)' '
1333         test_setup_nested_conflicts_from_rename_rename &&
1334         (
1335                 cd nested_conflicts_from_rename_rename &&
1336
1337                 git checkout L^0 &&
1338
1339                 # Merge must fail; there is a conflict
1340                 test_must_fail git merge -s recursive R^0 &&
1341
1342                 # Make sure the index has the right number of entries
1343                 git ls-files -s >out &&
1344                 test_line_count = 2 out &&
1345                 git ls-files -u >out &&
1346                 test_line_count = 2 out &&
1347                 # Ensure we have the correct number of untracked files
1348                 git ls-files -o >out &&
1349                 test_line_count = 1 out &&
1350
1351                 # Compare :2:three to expected values
1352                 git cat-file -p master:one >base &&
1353                 git cat-file -p L:three >ours &&
1354                 git cat-file -p R:one >theirs &&
1355                 test_must_fail git merge-file    \
1356                         -L "HEAD:three"  -L ""  -L "R^0:one" \
1357                         ours             base   theirs &&
1358                 sed -e "s/^\([<=>]\)/\1\1/" ours >L-three &&
1359                 git cat-file -p :2:three >expect &&
1360                 test_cmp expect L-three &&
1361
1362                 # Compare :2:three to expected values
1363                 git cat-file -p master:two >base &&
1364                 git cat-file -p L:two >ours &&
1365                 git cat-file -p R:three >theirs &&
1366                 test_must_fail git merge-file    \
1367                         -L "HEAD:two"  -L ""  -L "R^0:three" \
1368                         ours           base   theirs &&
1369                 sed -e "s/^\([<=>]\)/\1\1/" ours >R-three &&
1370                 git cat-file -p :3:three >expect &&
1371                 test_cmp expect R-three &&
1372
1373                 # Compare three to expected contents
1374                 >empty &&
1375                 test_must_fail git merge-file    \
1376                         -L "HEAD"  -L ""  -L "R^0" \
1377                         L-three    empty  R-three &&
1378                 test_cmp three L-three
1379         )
1380 '
1381
1382 test_done