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_expect_success 'setup rename/delete + untracked file' '
   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         (
  36                 cd rename-delete-untracked &&
  37
  38                 test_must_fail git merge -s recursive rename-the-ring &&
  39
  40                 # Make sure git did not delete an untracked file
  41                 test_path_is_file ring
  42         )
  43 '
  44
  45 # Testcase setup for rename/modify/add-source:
  46 #   Commit A: new file: a
  47 #   Commit B: modify a slightly
  48 #   Commit C: rename a->b, add completely different a
  49 #
  50 # We should be able to merge B & C cleanly
  51
  52 test_expect_success 'setup rename/modify/add-source conflict' '
  53         test_create_repo rename-modify-add-source &&
  54         (
  55                 cd rename-modify-add-source &&
  56
  57                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
  58                 git add a &&
  59                 git commit -m A &&
  60                 git tag A &&
  61
  62                 git checkout -b B A &&
  63                 echo 8 >>a &&
  64                 git add a &&
  65                 git commit -m B &&
  66
  67                 git checkout -b C A &&
  68                 git mv a b &&
  69                 echo something completely different >a &&
  70                 git add a &&
  71                 git commit -m C
  72         )
  73 '
  74
  75 test_expect_failure 'rename/modify/add-source conflict resolvable' '
  76         (
  77                 cd rename-modify-add-source &&
  78
  79                 git checkout B^0 &&
  80
  81                 git merge -s recursive C^0 &&
  82
  83                 git rev-parse >expect \
  84                         B:a   C:a     &&
  85                 git rev-parse >actual \
  86                         b     c       &&
  87                 test_cmp expect actual
  88         )
  89 '
  90
  91 test_expect_success 'setup resolvable conflict missed if rename missed' '
  92         test_create_repo break-detection-1 &&
  93         (
  94                 cd break-detection-1 &&
  95
  96                 printf "1\n2\n3\n4\n5\n" >a &&
  97                 echo foo >b &&
  98                 git add a b &&
  99                 git commit -m A &&
 100                 git tag A &&
 101
 102                 git checkout -b B A &&
 103                 git mv a c &&
 104                 echo "Completely different content" >a &&
 105                 git add a &&
 106                 git commit -m B &&
 107
 108                 git checkout -b C A &&
 109                 echo 6 >>a &&
 110                 git add a &&
 111                 git commit -m C
 112         )
 113 '
 114
 115 test_expect_failure 'conflict caused if rename not detected' '
 116         (
 117                 cd break-detection-1 &&
 118
 119                 git checkout -q C^0 &&
 120                 git merge -s recursive B^0 &&
 121
 122                 git ls-files -s >out &&
 123                 test_line_count = 3 out &&
 124                 git ls-files -u >out &&
 125                 test_line_count = 0 out &&
 126                 git ls-files -o >out &&
 127                 test_line_count = 1 out &&
 128
 129                 test_line_count = 6 c &&
 130                 git rev-parse >expect \
 131                         B:a   A:b     &&
 132                 git rev-parse >actual \
 133                         :0:a  :0:b    &&
 134                 test_cmp expect actual
 135         )
 136 '
 137
 138 test_expect_success 'setup conflict resolved wrong if rename missed' '
 139         test_create_repo break-detection-2 &&
 140         (
 141                 cd break-detection-2 &&
 142
 143                 printf "1\n2\n3\n4\n5\n" >a &&
 144                 echo foo >b &&
 145                 git add a b &&
 146                 git commit -m A &&
 147                 git tag A &&
 148
 149                 git checkout -b D A &&
 150                 echo 7 >>a &&
 151                 git add a &&
 152                 git mv a c &&
 153                 echo "Completely different content" >a &&
 154                 git add a &&
 155                 git commit -m D &&
 156
 157                 git checkout -b E A &&
 158                 git rm a &&
 159                 echo "Completely different content" >>a &&
 160                 git add a &&
 161                 git commit -m E
 162         )
 163 '
 164
 165 test_expect_failure 'missed conflict if rename not detected' '
 166         (
 167                 cd break-detection-2 &&
 168
 169                 git checkout -q E^0 &&
 170                 test_must_fail git merge -s recursive D^0
 171         )
 172 '
 173
 174 # Tests for undetected rename/add-source causing a file to erroneously be
 175 # deleted (and for mishandled rename/rename(1to1) causing the same issue).
 176 #
 177 # This test uses a rename/rename(1to1)+add-source conflict (1to1 means the
 178 # same file is renamed on both sides to the same thing; it should trigger
 179 # the 1to2 logic, which it would do if the add-source didn't cause issues
 180 # for git's rename detection):
 181 #   Commit A: new file: a
 182 #   Commit B: rename a->b
 183 #   Commit C: rename a->b, add unrelated a
 184
 185 test_expect_success 'setup undetected rename/add-source causes data loss' '
 186         test_create_repo break-detection-3 &&
 187         (
 188                 cd break-detection-3 &&
 189
 190                 printf "1\n2\n3\n4\n5\n" >a &&
 191                 git add a &&
 192                 git commit -m A &&
 193                 git tag A &&
 194
 195                 git checkout -b B A &&
 196                 git mv a b &&
 197                 git commit -m B &&
 198
 199                 git checkout -b C A &&
 200                 git mv a b &&
 201                 echo foobar >a &&
 202                 git add a &&
 203                 git commit -m C
 204         )
 205 '
 206
 207 test_expect_failure 'detect rename/add-source and preserve all data' '
 208         (
 209                 cd break-detection-3 &&
 210
 211                 git checkout B^0 &&
 212
 213                 git merge -s recursive C^0 &&
 214
 215                 git ls-files -s >out &&
 216                 test_line_count = 2 out &&
 217                 git ls-files -u >out &&
 218                 test_line_count = 2 out &&
 219                 git ls-files -o >out &&
 220                 test_line_count = 1 out &&
 221
 222                 test_path_is_file a &&
 223                 test_path_is_file b &&
 224
 225                 git rev-parse >expect \
 226                         A:a   C:a     &&
 227                 git rev-parse >actual \
 228                         :0:b  :0:a    &&
 229                 test_cmp expect actual
 230         )
 231 '
 232
 233 test_expect_failure 'detect rename/add-source and preserve all data, merge other way' '
 234         (
 235                 cd break-detection-3 &&
 236
 237                 git checkout C^0 &&
 238
 239                 git merge -s recursive B^0 &&
 240
 241                 git ls-files -s >out &&
 242                 test_line_count = 2 out &&
 243                 git ls-files -u >out &&
 244                 test_line_count = 2 out &&
 245                 git ls-files -o >out &&
 246                 test_line_count = 1 out &&
 247
 248                 test_path_is_file a &&
 249                 test_path_is_file b &&
 250
 251                 git rev-parse >expect \
 252                         A:a   C:a     &&
 253                 git rev-parse >actual \
 254                         :0:b  :0:a    &&
 255                 test_cmp expect actual
 256         )
 257 '
 258
 259 test_expect_success 'setup content merge + rename/directory conflict' '
 260         test_create_repo rename-directory-1 &&
 261         (
 262                 cd rename-directory-1 &&
 263
 264                 printf "1\n2\n3\n4\n5\n6\n" >file &&
 265                 git add file &&
 266                 test_tick &&
 267                 git commit -m base &&
 268                 git tag base &&
 269
 270                 git checkout -b right &&
 271                 echo 7 >>file &&
 272                 mkdir newfile &&
 273                 echo junk >newfile/realfile &&
 274                 git add file newfile/realfile &&
 275                 test_tick &&
 276                 git commit -m right &&
 277
 278                 git checkout -b left-conflict base &&
 279                 echo 8 >>file &&
 280                 git add file &&
 281                 git mv file newfile &&
 282                 test_tick &&
 283                 git commit -m left &&
 284
 285                 git checkout -b left-clean base &&
 286                 echo 0 >newfile &&
 287                 cat file >>newfile &&
 288                 git add newfile &&
 289                 git rm file &&
 290                 test_tick &&
 291                 git commit -m left
 292         )
 293 '
 294
 295 test_expect_success 'rename/directory conflict + clean content merge' '
 296         (
 297                 cd rename-directory-1 &&
 298
 299                 git checkout left-clean^0 &&
 300
 301                 test_must_fail git merge -s recursive right^0 &&
 302
 303                 git ls-files -s >out &&
 304                 test_line_count = 2 out &&
 305                 git ls-files -u >out &&
 306                 test_line_count = 1 out &&
 307                 git ls-files -o >out &&
 308                 test_line_count = 2 out &&
 309
 310                 echo 0 >expect &&
 311                 git cat-file -p base:file >>expect &&
 312                 echo 7 >>expect &&
 313                 test_cmp expect newfile~HEAD &&
 314
 315                 test $(git rev-parse :2:newfile) = $(git hash-object expect) &&
 316
 317                 test_path_is_file newfile/realfile &&
 318                 test_path_is_file newfile~HEAD
 319         )
 320 '
 321
 322 test_expect_success 'rename/directory conflict + content merge conflict' '
 323         (
 324                 cd rename-directory-1 &&
 325
 326                 git reset --hard &&
 327                 git reset --hard &&
 328                 git clean -fdqx &&
 329
 330                 git checkout left-conflict^0 &&
 331
 332                 test_must_fail git merge -s recursive right^0 &&
 333
 334                 git ls-files -s >out &&
 335                 test_line_count = 4 out &&
 336                 git ls-files -u >out &&
 337                 test_line_count = 3 out &&
 338                 git ls-files -o >out &&
 339                 test_line_count = 2 out &&
 340
 341                 git cat-file -p left-conflict:newfile >left &&
 342                 git cat-file -p base:file    >base &&
 343                 git cat-file -p right:file   >right &&
 344                 test_must_fail git merge-file \
 345                         -L "HEAD:newfile" \
 346                         -L "" \
 347                         -L "right^0:file" \
 348                         left base right &&
 349                 test_cmp left newfile~HEAD &&
 350
 351                 git rev-parse >expect                                 \
 352                         base:file   left-conflict:newfile  right:file &&
 353                 git rev-parse >actual                                 \
 354                         :1:newfile  :2:newfile             :3:newfile &&
 355                 test_cmp expect actual &&
 356
 357                 test_path_is_file newfile/realfile &&
 358                 test_path_is_file newfile~HEAD
 359         )
 360 '
 361
 362 test_expect_success 'setup content merge + rename/directory conflict w/ disappearing dir' '
 363         test_create_repo rename-directory-2 &&
 364         (
 365                 cd rename-directory-2 &&
 366
 367                 mkdir sub &&
 368                 printf "1\n2\n3\n4\n5\n6\n" >sub/file &&
 369                 git add sub/file &&
 370                 test_tick &&
 371                 git commit -m base &&
 372                 git tag base &&
 373
 374                 git checkout -b right &&
 375                 echo 7 >>sub/file &&
 376                 git add sub/file &&
 377                 test_tick &&
 378                 git commit -m right &&
 379
 380                 git checkout -b left base &&
 381                 echo 0 >newfile &&
 382                 cat sub/file >>newfile &&
 383                 git rm sub/file &&
 384                 mv newfile sub &&
 385                 git add sub &&
 386                 test_tick &&
 387                 git commit -m left
 388         )
 389 '
 390
 391 test_expect_success 'disappearing dir in rename/directory conflict handled' '
 392         (
 393                 cd rename-directory-2 &&
 394
 395                 git checkout left^0 &&
 396
 397                 git merge -s recursive right^0 &&
 398
 399                 git ls-files -s >out &&
 400                 test_line_count = 1 out &&
 401                 git ls-files -u >out &&
 402                 test_line_count = 0 out &&
 403                 git ls-files -o >out &&
 404                 test_line_count = 1 out &&
 405
 406                 echo 0 >expect &&
 407                 git cat-file -p base:sub/file >>expect &&
 408                 echo 7 >>expect &&
 409                 test_cmp expect sub &&
 410
 411                 test_path_is_file sub
 412         )
 413 '
 414
 415 # Test for all kinds of things that can go wrong with rename/rename (2to1):
 416 #   Commit A: new files: a & b
 417 #   Commit B: rename a->c, modify b
 418 #   Commit C: rename b->c, modify a
 419 #
 420 # Merging of B & C should NOT be clean.  Questions:
 421 #   * Both a & b should be removed by the merge; are they?
 422 #   * The two c's should contain modifications to a & b; do they?
 423 #   * The index should contain two files, both for c; does it?
 424 #   * The working copy should have two files, both of form c~<unique>; does it?
 425 #   * Nothing else should be present.  Is anything?
 426
 427 test_expect_success 'setup rename/rename (2to1) + modify/modify' '
 428         test_create_repo rename-rename-2to1 &&
 429         (
 430                 cd rename-rename-2to1 &&
 431
 432                 printf "1\n2\n3\n4\n5\n" >a &&
 433                 printf "5\n4\n3\n2\n1\n" >b &&
 434                 git add a b &&
 435                 git commit -m A &&
 436                 git tag A &&
 437
 438                 git checkout -b B A &&
 439                 git mv a c &&
 440                 echo 0 >>b &&
 441                 git add b &&
 442                 git commit -m B &&
 443
 444                 git checkout -b C A &&
 445                 git mv b c &&
 446                 echo 6 >>a &&
 447                 git add a &&
 448                 git commit -m C
 449         )
 450 '
 451
 452 test_expect_success 'handle rename/rename (2to1) conflict correctly' '
 453         (
 454                 cd rename-rename-2to1 &&
 455
 456                 git checkout B^0 &&
 457
 458                 test_must_fail git merge -s recursive C^0 >out &&
 459                 test_i18ngrep "CONFLICT (rename/rename)" out &&
 460
 461                 git ls-files -s >out &&
 462                 test_line_count = 2 out &&
 463                 git ls-files -u >out &&
 464                 test_line_count = 2 out &&
 465                 git ls-files -u c >out &&
 466                 test_line_count = 2 out &&
 467                 git ls-files -o >out &&
 468                 test_line_count = 3 out &&
 469
 470                 test_path_is_missing a &&
 471                 test_path_is_missing b &&
 472                 test_path_is_file c~HEAD &&
 473                 test_path_is_file c~C^0 &&
 474
 475                 git rev-parse >expect   \
 476                         C:a     B:b     &&
 477                 git hash-object >actual \
 478                         c~HEAD  c~C^0   &&
 479                 test_cmp expect actual
 480         )
 481 '
 482
 483 # Testcase setup for simple rename/rename (1to2) conflict:
 484 #   Commit A: new file: a
 485 #   Commit B: rename a->b
 486 #   Commit C: rename a->c
 487 test_expect_success 'setup simple rename/rename (1to2) conflict' '
 488         test_create_repo rename-rename-1to2 &&
 489         (
 490                 cd rename-rename-1to2 &&
 491
 492                 echo stuff >a &&
 493                 git add a &&
 494                 test_tick &&
 495                 git commit -m A &&
 496                 git tag A &&
 497
 498                 git checkout -b B A &&
 499                 git mv a b &&
 500                 test_tick &&
 501                 git commit -m B &&
 502
 503                 git checkout -b C A &&
 504                 git mv a c &&
 505                 test_tick &&
 506                 git commit -m C
 507         )
 508 '
 509
 510 test_expect_success 'merge has correct working tree contents' '
 511         (
 512                 cd rename-rename-1to2 &&
 513
 514                 git checkout C^0 &&
 515
 516                 test_must_fail git merge -s recursive B^0 &&
 517
 518                 git ls-files -s >out &&
 519                 test_line_count = 3 out &&
 520                 git ls-files -u >out &&
 521                 test_line_count = 3 out &&
 522                 git ls-files -o >out &&
 523                 test_line_count = 1 out &&
 524
 525                 test_path_is_missing a &&
 526                 git rev-parse >expect   \
 527                         A:a   A:a   A:a \
 528                         A:a   A:a       &&
 529                 git rev-parse >actual    \
 530                         :1:a  :3:b  :2:c &&
 531                 git hash-object >>actual \
 532                         b     c          &&
 533                 test_cmp expect actual
 534         )
 535 '
 536
 537 # Testcase setup for rename/rename(1to2)/add-source conflict:
 538 #   Commit A: new file: a
 539 #   Commit B: rename a->b
 540 #   Commit C: rename a->c, add completely different a
 541 #
 542 # Merging of B & C should NOT be clean; there's a rename/rename conflict
 543
 544 test_expect_success 'setup rename/rename(1to2)/add-source conflict' '
 545         test_create_repo rename-rename-1to2-add-source-1 &&
 546         (
 547                 cd rename-rename-1to2-add-source-1 &&
 548
 549                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
 550                 git add a &&
 551                 git commit -m A &&
 552                 git tag A &&
 553
 554                 git checkout -b B A &&
 555                 git mv a b &&
 556                 git commit -m B &&
 557
 558                 git checkout -b C A &&
 559                 git mv a c &&
 560                 echo something completely different >a &&
 561                 git add a &&
 562                 git commit -m C
 563         )
 564 '
 565
 566 test_expect_failure 'detect conflict with rename/rename(1to2)/add-source merge' '
 567         (
 568                 cd rename-rename-1to2-add-source-1 &&
 569
 570                 git checkout B^0 &&
 571
 572                 test_must_fail git merge -s recursive C^0 &&
 573
 574                 git ls-files -s >out &&
 575                 test_line_count = 4 out &&
 576                 git ls-files -o >out &&
 577                 test_line_count = 1 out &&
 578
 579                 git rev-parse >expect         \
 580                         C:a   A:a   B:b   C:C &&
 581                 git rev-parse >actual          \
 582                         :3:a  :1:a  :2:b  :3:c &&
 583                 test_cmp expect actual &&
 584
 585                 test_path_is_file a &&
 586                 test_path_is_file b &&
 587                 test_path_is_file c
 588         )
 589 '
 590
 591 test_expect_success 'setup rename/rename(1to2)/add-source resolvable conflict' '
 592         test_create_repo rename-rename-1to2-add-source-2 &&
 593         (
 594                 cd rename-rename-1to2-add-source-2 &&
 595
 596                 >a &&
 597                 git add a &&
 598                 test_tick &&
 599                 git commit -m base &&
 600                 git tag A &&
 601
 602                 git checkout -b B A &&
 603                 git mv a b &&
 604                 test_tick &&
 605                 git commit -m one &&
 606
 607                 git checkout -b C A &&
 608                 git mv a b &&
 609                 echo important-info >a &&
 610                 git add a &&
 611                 test_tick &&
 612                 git commit -m two
 613         )
 614 '
 615
 616 test_expect_failure 'rename/rename/add-source still tracks new a file' '
 617         (
 618                 cd rename-rename-1to2-add-source-2 &&
 619
 620                 git checkout C^0 &&
 621                 git merge -s recursive B^0 &&
 622
 623                 git ls-files -s >out &&
 624                 test_line_count = 2 out &&
 625                 git ls-files -o >out &&
 626                 test_line_count = 1 out &&
 627
 628                 git rev-parse >expect \
 629                         C:a   A:a     &&
 630                 git rev-parse >actual \
 631                         :0:a  :0:b    &&
 632                 test_cmp expect actual
 633         )
 634 '
 635
 636 test_expect_success 'setup rename/rename(1to2)/add-dest conflict' '
 637         test_create_repo rename-rename-1to2-add-dest &&
 638         (
 639                 cd rename-rename-1to2-add-dest &&
 640
 641                 echo stuff >a &&
 642                 git add a &&
 643                 test_tick &&
 644                 git commit -m base &&
 645                 git tag A &&
 646
 647                 git checkout -b B A &&
 648                 git mv a b &&
 649                 echo precious-data >c &&
 650                 git add c &&
 651                 test_tick &&
 652                 git commit -m one &&
 653
 654                 git checkout -b C A &&
 655                 git mv a c &&
 656                 echo important-info >b &&
 657                 git add b &&
 658                 test_tick &&
 659                 git commit -m two
 660         )
 661 '
 662
 663 test_expect_success 'rename/rename/add-dest merge still knows about conflicting file versions' '
 664         (
 665                 cd rename-rename-1to2-add-dest &&
 666
 667                 git checkout C^0 &&
 668                 test_must_fail git merge -s recursive B^0 &&
 669
 670                 git ls-files -s >out &&
 671                 test_line_count = 5 out &&
 672                 git ls-files -u b >out &&
 673                 test_line_count = 2 out &&
 674                 git ls-files -u c >out &&
 675                 test_line_count = 2 out &&
 676                 git ls-files -o >out &&
 677                 test_line_count = 5 out &&
 678
 679                 git rev-parse >expect               \
 680                         A:a   C:b   B:b   C:c   B:c &&
 681                 git rev-parse >actual                \
 682                         :1:a  :2:b  :3:b  :2:c  :3:c &&
 683                 test_cmp expect actual &&
 684
 685                 git rev-parse >expect               \
 686                         C:c     B:c     C:b     B:b &&
 687                 git hash-object >actual                \
 688                         c~HEAD  c~B\^0  b~HEAD  b~B\^0 &&
 689                 test_cmp expect actual &&
 690
 691                 test_path_is_missing b &&
 692                 test_path_is_missing c
 693         )
 694 '
 695
 696 test_done