t/t6422-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 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
   7 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
   8
   9 TEST_PASSES_SANITIZE_LEAK=true
  10 . ./test-lib.sh
  11 . "$TEST_DIRECTORY"/lib-merge.sh
  12
  13 test_setup_rename_delete_untracked () {
  14         git init rename-delete-untracked &&
  15         (
  16                 cd rename-delete-untracked &&
  17
  18                 echo "A pretty inscription" >ring &&
  19                 git add ring &&
  20                 test_tick &&
  21                 git commit -m beginning &&
  22
  23                 git branch people &&
  24                 git checkout -b rename-the-ring &&
  25                 git mv ring one-ring-to-rule-them-all &&
  26                 test_tick &&
  27                 git commit -m fullname &&
  28
  29                 git checkout people &&
  30                 git rm ring &&
  31                 echo gollum >owner &&
  32                 git add owner &&
  33                 test_tick &&
  34                 git commit -m track-people-instead-of-objects &&
  35                 echo "Myyy PRECIOUSSS" >ring
  36         )
  37 }
  38
  39 test_expect_success "Does git preserve Gollum's precious artifact?" '
  40         test_setup_rename_delete_untracked &&
  41         (
  42                 cd rename-delete-untracked &&
  43
  44                 test_must_fail git merge -s recursive rename-the-ring &&
  45
  46                 # Make sure git did not delete an untracked file
  47                 test_path_is_file ring
  48         )
  49 '
  50
  51 # Testcase setup for rename/modify/add-source:
  52 #   Commit A: new file: a
  53 #   Commit B: modify a slightly
  54 #   Commit C: rename a->b, add completely different a
  55 #
  56 # We should be able to merge B & C cleanly
  57
  58 test_setup_rename_modify_add_source () {
  59         git init rename-modify-add-source &&
  60         (
  61                 cd rename-modify-add-source &&
  62
  63                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
  64                 git add a &&
  65                 git commit -m A &&
  66                 git tag A &&
  67
  68                 git checkout -b B A &&
  69                 echo 8 >>a &&
  70                 git add a &&
  71                 git commit -m B &&
  72
  73                 git checkout -b C A &&
  74                 git mv a b &&
  75                 echo something completely different >a &&
  76                 git add a &&
  77                 git commit -m C
  78         )
  79 }
  80
  81 test_expect_failure 'rename/modify/add-source conflict resolvable' '
  82         test_setup_rename_modify_add_source &&
  83         (
  84                 cd rename-modify-add-source &&
  85
  86                 git checkout B^0 &&
  87
  88                 git merge -s recursive C^0 &&
  89
  90                 git rev-parse >expect \
  91                         B:a   C:a     &&
  92                 git rev-parse >actual \
  93                         b     c       &&
  94                 test_cmp expect actual
  95         )
  96 '
  97
  98 test_setup_break_detection_1 () {
  99         git init break-detection-1 &&
 100         (
 101                 cd break-detection-1 &&
 102
 103                 printf "1\n2\n3\n4\n5\n" >a &&
 104                 echo foo >b &&
 105                 git add a b &&
 106                 git commit -m A &&
 107                 git tag A &&
 108
 109                 git checkout -b B A &&
 110                 git mv a c &&
 111                 echo "Completely different content" >a &&
 112                 git add a &&
 113                 git commit -m B &&
 114
 115                 git checkout -b C A &&
 116                 echo 6 >>a &&
 117                 git add a &&
 118                 git commit -m C
 119         )
 120 }
 121
 122 test_expect_failure 'conflict caused if rename not detected' '
 123         test_setup_break_detection_1 &&
 124         (
 125                 cd break-detection-1 &&
 126
 127                 git checkout -q C^0 &&
 128                 git merge -s recursive B^0 &&
 129
 130                 git ls-files -s >out &&
 131                 test_line_count = 3 out &&
 132                 git ls-files -u >out &&
 133                 test_line_count = 0 out &&
 134                 git ls-files -o >out &&
 135                 test_line_count = 1 out &&
 136
 137                 test_line_count = 6 c &&
 138                 git rev-parse >expect \
 139                         B:a   A:b     &&
 140                 git rev-parse >actual \
 141                         :0:a  :0:b    &&
 142                 test_cmp expect actual
 143         )
 144 '
 145
 146 test_setup_break_detection_2 () {
 147         git init break-detection-2 &&
 148         (
 149                 cd break-detection-2 &&
 150
 151                 printf "1\n2\n3\n4\n5\n" >a &&
 152                 echo foo >b &&
 153                 git add a b &&
 154                 git commit -m A &&
 155                 git tag A &&
 156
 157                 git checkout -b D A &&
 158                 echo 7 >>a &&
 159                 git add a &&
 160                 git mv a c &&
 161                 echo "Completely different content" >a &&
 162                 git add a &&
 163                 git commit -m D &&
 164
 165                 git checkout -b E A &&
 166                 git rm a &&
 167                 echo "Completely different content" >>a &&
 168                 git add a &&
 169                 git commit -m E
 170         )
 171 }
 172
 173 test_expect_failure 'missed conflict if rename not detected' '
 174         test_setup_break_detection_2 &&
 175         (
 176                 cd break-detection-2 &&
 177
 178                 git checkout -q E^0 &&
 179                 test_must_fail git merge -s recursive D^0
 180         )
 181 '
 182
 183 # Tests for undetected rename/add-source causing a file to erroneously be
 184 # deleted (and for mishandled rename/rename(1to1) causing the same issue).
 185 #
 186 # This test uses a rename/rename(1to1)+add-source conflict (1to1 means the
 187 # same file is renamed on both sides to the same thing; it should trigger
 188 # the 1to2 logic, which it would do if the add-source didn't cause issues
 189 # for git's rename detection):
 190 #   Commit A: new file: a
 191 #   Commit B: rename a->b
 192 #   Commit C: rename a->b, add unrelated a
 193
 194 test_setup_break_detection_3 () {
 195         git init break-detection-3 &&
 196         (
 197                 cd break-detection-3 &&
 198
 199                 printf "1\n2\n3\n4\n5\n" >a &&
 200                 git add a &&
 201                 git commit -m A &&
 202                 git tag A &&
 203
 204                 git checkout -b B A &&
 205                 git mv a b &&
 206                 git commit -m B &&
 207
 208                 git checkout -b C A &&
 209                 git mv a b &&
 210                 echo foobar >a &&
 211                 git add a &&
 212                 git commit -m C
 213         )
 214 }
 215
 216 test_expect_failure 'detect rename/add-source and preserve all data' '
 217         test_setup_break_detection_3 &&
 218         (
 219                 cd break-detection-3 &&
 220
 221                 git checkout B^0 &&
 222
 223                 git merge -s recursive C^0 &&
 224
 225                 git ls-files -s >out &&
 226                 test_line_count = 2 out &&
 227                 git ls-files -u >out &&
 228                 test_line_count = 2 out &&
 229                 git ls-files -o >out &&
 230                 test_line_count = 1 out &&
 231
 232                 test_path_is_file a &&
 233                 test_path_is_file b &&
 234
 235                 git rev-parse >expect \
 236                         A:a   C:a     &&
 237                 git rev-parse >actual \
 238                         :0:b  :0:a    &&
 239                 test_cmp expect actual
 240         )
 241 '
 242
 243 test_expect_failure 'detect rename/add-source and preserve all data, merge other way' '
 244         test_setup_break_detection_3 &&
 245         (
 246                 cd break-detection-3 &&
 247
 248                 git checkout C^0 &&
 249
 250                 git merge -s recursive B^0 &&
 251
 252                 git ls-files -s >out &&
 253                 test_line_count = 2 out &&
 254                 git ls-files -u >out &&
 255                 test_line_count = 2 out &&
 256                 git ls-files -o >out &&
 257                 test_line_count = 1 out &&
 258
 259                 test_path_is_file a &&
 260                 test_path_is_file b &&
 261
 262                 git rev-parse >expect \
 263                         A:a   C:a     &&
 264                 git rev-parse >actual \
 265                         :0:b  :0:a    &&
 266                 test_cmp expect actual
 267         )
 268 '
 269
 270 test_setup_rename_directory () {
 271         git init rename-directory-$1 &&
 272         (
 273                 cd rename-directory-$1 &&
 274
 275                 printf "1\n2\n3\n4\n5\n6\n" >file &&
 276                 git add file &&
 277                 test_tick &&
 278                 git commit -m base &&
 279                 git tag base &&
 280
 281                 git checkout -b right &&
 282                 echo 7 >>file &&
 283                 mkdir newfile &&
 284                 echo junk >newfile/realfile &&
 285                 git add file newfile/realfile &&
 286                 test_tick &&
 287                 git commit -m right &&
 288
 289                 git checkout -b left-conflict base &&
 290                 echo 8 >>file &&
 291                 git add file &&
 292                 git mv file newfile &&
 293                 test_tick &&
 294                 git commit -m left &&
 295
 296                 git checkout -b left-clean base &&
 297                 echo 0 >newfile &&
 298                 cat file >>newfile &&
 299                 git add newfile &&
 300                 git rm file &&
 301                 test_tick &&
 302                 git commit -m left
 303         )
 304 }
 305
 306 test_expect_success 'rename/directory conflict + clean content merge' '
 307         test_setup_rename_directory 1a &&
 308         (
 309                 cd rename-directory-1a &&
 310
 311                 git checkout left-clean^0 &&
 312
 313                 test_must_fail git merge -s recursive right^0 &&
 314
 315                 git ls-files -s >out &&
 316                 test_line_count = 2 out &&
 317                 git ls-files -u >out &&
 318                 test_line_count = 1 out &&
 319                 git ls-files -o >out &&
 320                 if test "$GIT_TEST_MERGE_ALGORITHM" = ort
 321                 then
 322                         test_line_count = 1 out
 323                 else
 324                         test_line_count = 2 out
 325                 fi &&
 326
 327                 echo 0 >expect &&
 328                 git cat-file -p base:file >>expect &&
 329                 echo 7 >>expect &&
 330                 test_cmp expect newfile~HEAD &&
 331
 332                 test_path_is_file newfile/realfile &&
 333                 test_path_is_file newfile~HEAD
 334         )
 335 '
 336
 337 test_expect_success 'rename/directory conflict + content merge conflict' '
 338         test_setup_rename_directory 1b &&
 339         (
 340                 cd rename-directory-1b &&
 341
 342                 git reset --hard &&
 343                 git clean -fdqx &&
 344
 345                 git checkout left-conflict^0 &&
 346
 347                 test_must_fail git merge -s recursive right^0 &&
 348
 349                 git ls-files -s >out &&
 350                 test_line_count = 4 out &&
 351                 git ls-files -u >out &&
 352                 test_line_count = 3 out &&
 353                 git ls-files -o >out &&
 354                 if test "$GIT_TEST_MERGE_ALGORITHM" = ort
 355                 then
 356                         test_line_count = 1 out
 357                 else
 358                         test_line_count = 2 out
 359                 fi &&
 360
 361                 git cat-file -p left-conflict:newfile >left &&
 362                 git cat-file -p base:file    >base &&
 363                 git cat-file -p right:file   >right &&
 364                 test_must_fail git merge-file \
 365                         -L "HEAD:newfile" \
 366                         -L "" \
 367                         -L "right^0:file" \
 368                         left base right &&
 369                 test_cmp left newfile~HEAD &&
 370
 371                 git rev-parse >expect   \
 372                         base:file       left-conflict:newfile right:file &&
 373                 if test "$GIT_TEST_MERGE_ALGORITHM" = ort
 374                 then
 375                         git rev-parse >actual \
 376                                 :1:newfile~HEAD :2:newfile~HEAD :3:newfile~HEAD
 377                 else
 378                         git rev-parse >actual \
 379                                 :1:newfile      :2:newfile      :3:newfile
 380                 fi &&
 381                 test_cmp expect actual &&
 382
 383                 test_path_is_file newfile/realfile &&
 384                 test_path_is_file newfile~HEAD
 385         )
 386 '
 387
 388 test_setup_rename_directory_2 () {
 389         git init rename-directory-2 &&
 390         (
 391                 cd rename-directory-2 &&
 392
 393                 mkdir sub &&
 394                 printf "1\n2\n3\n4\n5\n6\n" >sub/file &&
 395                 git add sub/file &&
 396                 test_tick &&
 397                 git commit -m base &&
 398                 git tag base &&
 399
 400                 git checkout -b right &&
 401                 echo 7 >>sub/file &&
 402                 git add sub/file &&
 403                 test_tick &&
 404                 git commit -m right &&
 405
 406                 git checkout -b left base &&
 407                 echo 0 >newfile &&
 408                 cat sub/file >>newfile &&
 409                 git rm sub/file &&
 410                 mv newfile sub &&
 411                 git add sub &&
 412                 test_tick &&
 413                 git commit -m left
 414         )
 415 }
 416
 417 test_expect_success 'disappearing dir in rename/directory conflict handled' '
 418         test_setup_rename_directory_2 &&
 419         (
 420                 cd rename-directory-2 &&
 421
 422                 git checkout left^0 &&
 423
 424                 git merge -s recursive right^0 &&
 425
 426                 git ls-files -s >out &&
 427                 test_line_count = 1 out &&
 428                 git ls-files -u >out &&
 429                 test_line_count = 0 out &&
 430                 git ls-files -o >out &&
 431                 test_line_count = 1 out &&
 432
 433                 echo 0 >expect &&
 434                 git cat-file -p base:sub/file >>expect &&
 435                 echo 7 >>expect &&
 436                 test_cmp expect sub &&
 437
 438                 test_path_is_file sub
 439         )
 440 '
 441
 442 # Test for basic rename/add-dest conflict, with rename needing content merge:
 443 #   Commit O: a
 444 #   Commit A: rename a->b, modifying b too
 445 #   Commit B: modify a, add different b
 446
 447 test_setup_rename_with_content_merge_and_add () {
 448         git init rename-with-content-merge-and-add-$1 &&
 449         (
 450                 cd rename-with-content-merge-and-add-$1 &&
 451
 452                 test_seq 1 5 >a &&
 453                 git add a &&
 454                 git commit -m O &&
 455                 git tag O &&
 456
 457                 git checkout -b A O &&
 458                 git mv a b &&
 459                 test_seq 0 5 >b &&
 460                 git add b &&
 461                 git commit -m A &&
 462
 463                 git checkout -b B O &&
 464                 echo 6 >>a &&
 465                 echo hello world >b &&
 466                 git add a b &&
 467                 git commit -m B
 468         )
 469 }
 470
 471 test_expect_success 'handle rename-with-content-merge vs. add' '
 472         test_setup_rename_with_content_merge_and_add AB &&
 473         (
 474                 cd rename-with-content-merge-and-add-AB &&
 475
 476                 git checkout A^0 &&
 477
 478                 test_must_fail git merge -s recursive B^0 >out &&
 479                 test_grep "CONFLICT (.*/add)" out &&
 480
 481                 git ls-files -s >out &&
 482                 test_line_count = 2 out &&
 483                 git ls-files -u >out &&
 484                 test_line_count = 2 out &&
 485                 # Also, make sure both unmerged entries are for "b"
 486                 git ls-files -u b >out &&
 487                 test_line_count = 2 out &&
 488                 git ls-files -o >out &&
 489                 test_line_count = 1 out &&
 490
 491                 test_path_is_missing a &&
 492                 test_path_is_file b &&
 493
 494                 test_seq 0 6 >tmp &&
 495                 git hash-object tmp >expect &&
 496                 git rev-parse B:b >>expect &&
 497                 git rev-parse >actual  \
 498                         :2:b    :3:b   &&
 499                 test_cmp expect actual &&
 500
 501                 # Test that the two-way merge in b is as expected
 502                 git cat-file -p :2:b >>ours &&
 503                 git cat-file -p :3:b >>theirs &&
 504                 >empty &&
 505                 test_must_fail git merge-file \
 506                         -L "HEAD" \
 507                         -L "" \
 508                         -L "B^0" \
 509                         ours empty theirs &&
 510                 test_cmp ours b
 511         )
 512 '
 513
 514 test_expect_success 'handle rename-with-content-merge vs. add, merge other way' '
 515         test_setup_rename_with_content_merge_and_add BA &&
 516         (
 517                 cd rename-with-content-merge-and-add-BA &&
 518
 519                 git reset --hard &&
 520                 git clean -fdx &&
 521
 522                 git checkout B^0 &&
 523
 524                 test_must_fail git merge -s recursive A^0 >out &&
 525                 test_grep "CONFLICT (.*/add)" out &&
 526
 527                 git ls-files -s >out &&
 528                 test_line_count = 2 out &&
 529                 git ls-files -u >out &&
 530                 test_line_count = 2 out &&
 531                 # Also, make sure both unmerged entries are for "b"
 532                 git ls-files -u b >out &&
 533                 test_line_count = 2 out &&
 534                 git ls-files -o >out &&
 535                 test_line_count = 1 out &&
 536
 537                 test_path_is_missing a &&
 538                 test_path_is_file b &&
 539
 540                 test_seq 0 6 >tmp &&
 541                 git rev-parse B:b >expect &&
 542                 git hash-object tmp >>expect &&
 543                 git rev-parse >actual  \
 544                         :2:b    :3:b   &&
 545                 test_cmp expect actual &&
 546
 547                 # Test that the two-way merge in b is as expected
 548                 git cat-file -p :2:b >>ours &&
 549                 git cat-file -p :3:b >>theirs &&
 550                 >empty &&
 551                 test_must_fail git merge-file \
 552                         -L "HEAD" \
 553                         -L "" \
 554                         -L "A^0" \
 555                         ours empty theirs &&
 556                 test_cmp ours b
 557         )
 558 '
 559
 560 # Test for all kinds of things that can go wrong with rename/rename (2to1):
 561 #   Commit A: new files: a & b
 562 #   Commit B: rename a->c, modify b
 563 #   Commit C: rename b->c, modify a
 564 #
 565 # Merging of B & C should NOT be clean.  Questions:
 566 #   * Both a & b should be removed by the merge; are they?
 567 #   * The two c's should contain modifications to a & b; do they?
 568 #   * The index should contain two files, both for c; does it?
 569 #   * The working copy should have two files, both of form c~<unique>; does it?
 570 #   * Nothing else should be present.  Is anything?
 571
 572 test_setup_rename_rename_2to1 () {
 573         git init rename-rename-2to1 &&
 574         (
 575                 cd rename-rename-2to1 &&
 576
 577                 printf "1\n2\n3\n4\n5\n" >a &&
 578                 printf "5\n4\n3\n2\n1\n" >b &&
 579                 git add a b &&
 580                 git commit -m A &&
 581                 git tag A &&
 582
 583                 git checkout -b B A &&
 584                 git mv a c &&
 585                 echo 0 >>b &&
 586                 git add b &&
 587                 git commit -m B &&
 588
 589                 git checkout -b C A &&
 590                 git mv b c &&
 591                 echo 6 >>a &&
 592                 git add a &&
 593                 git commit -m C
 594         )
 595 }
 596
 597 test_expect_success 'handle rename/rename (2to1) conflict correctly' '
 598         test_setup_rename_rename_2to1 &&
 599         (
 600                 cd rename-rename-2to1 &&
 601
 602                 git checkout B^0 &&
 603
 604                 test_must_fail git merge -s recursive C^0 >out &&
 605                 test_grep "CONFLICT (\(.*\)/\1)" out &&
 606
 607                 git ls-files -s >out &&
 608                 test_line_count = 2 out &&
 609                 git ls-files -u >out &&
 610                 test_line_count = 2 out &&
 611                 git ls-files -u c >out &&
 612                 test_line_count = 2 out &&
 613                 git ls-files -o >out &&
 614                 test_line_count = 1 out &&
 615
 616                 test_path_is_missing a &&
 617                 test_path_is_missing b &&
 618
 619                 git rev-parse >expect  \
 620                         C:a     B:b    &&
 621                 git rev-parse >actual  \
 622                         :2:c    :3:c   &&
 623                 test_cmp expect actual &&
 624
 625                 # Test that the two-way merge in new_a is as expected
 626                 git cat-file -p :2:c >>ours &&
 627                 git cat-file -p :3:c >>theirs &&
 628                 >empty &&
 629                 test_must_fail git merge-file \
 630                         -L "HEAD" \
 631                         -L "" \
 632                         -L "C^0" \
 633                         ours empty theirs &&
 634                 git hash-object c >actual &&
 635                 git hash-object ours >expect &&
 636                 test_cmp expect actual
 637         )
 638 '
 639
 640 # Testcase setup for simple rename/rename (1to2) conflict:
 641 #   Commit A: new file: a
 642 #   Commit B: rename a->b
 643 #   Commit C: rename a->c
 644 test_setup_rename_rename_1to2 () {
 645         git init rename-rename-1to2 &&
 646         (
 647                 cd rename-rename-1to2 &&
 648
 649                 echo stuff >a &&
 650                 git add a &&
 651                 test_tick &&
 652                 git commit -m A &&
 653                 git tag A &&
 654
 655                 git checkout -b B A &&
 656                 git mv a b &&
 657                 test_tick &&
 658                 git commit -m B &&
 659
 660                 git checkout -b C A &&
 661                 git mv a c &&
 662                 test_tick &&
 663                 git commit -m C
 664         )
 665 }
 666
 667 test_expect_success 'merge has correct working tree contents' '
 668         test_setup_rename_rename_1to2 &&
 669         (
 670                 cd rename-rename-1to2 &&
 671
 672                 git checkout C^0 &&
 673
 674                 test_must_fail git merge -s recursive B^0 &&
 675
 676                 git ls-files -s >out &&
 677                 test_line_count = 3 out &&
 678                 git ls-files -u >out &&
 679                 test_line_count = 3 out &&
 680                 git ls-files -o >out &&
 681                 test_line_count = 1 out &&
 682
 683                 test_path_is_missing a &&
 684                 git rev-parse >expect   \
 685                         A:a   A:a   A:a \
 686                         A:a   A:a       &&
 687                 git rev-parse >actual    \
 688                         :1:a  :3:b  :2:c &&
 689                 git hash-object >>actual \
 690                         b     c          &&
 691                 test_cmp expect actual
 692         )
 693 '
 694
 695 # Testcase setup for rename/rename(1to2)/add-source conflict:
 696 #   Commit A: new file: a
 697 #   Commit B: rename a->b
 698 #   Commit C: rename a->c, add completely different a
 699 #
 700 # Merging of B & C should NOT be clean; there's a rename/rename conflict
 701
 702 test_setup_rename_rename_1to2_add_source_1 () {
 703         git init rename-rename-1to2-add-source-1 &&
 704         (
 705                 cd rename-rename-1to2-add-source-1 &&
 706
 707                 printf "1\n2\n3\n4\n5\n6\n7\n" >a &&
 708                 git add a &&
 709                 git commit -m A &&
 710                 git tag A &&
 711
 712                 git checkout -b B A &&
 713                 git mv a b &&
 714                 git commit -m B &&
 715
 716                 git checkout -b C A &&
 717                 git mv a c &&
 718                 echo something completely different >a &&
 719                 git add a &&
 720                 git commit -m C
 721         )
 722 }
 723
 724 test_expect_failure 'detect conflict with rename/rename(1to2)/add-source merge' '
 725         test_setup_rename_rename_1to2_add_source_1 &&
 726         (
 727                 cd rename-rename-1to2-add-source-1 &&
 728
 729                 git checkout B^0 &&
 730
 731                 test_must_fail git merge -s recursive C^0 &&
 732
 733                 git ls-files -s >out &&
 734                 test_line_count = 4 out &&
 735                 git ls-files -o >out &&
 736                 test_line_count = 1 out &&
 737
 738                 git rev-parse >expect         \
 739                         C:a   A:a   B:b   C:C &&
 740                 git rev-parse >actual          \
 741                         :3:a  :1:a  :2:b  :3:c &&
 742                 test_cmp expect actual &&
 743
 744                 test_path_is_file a &&
 745                 test_path_is_file b &&
 746                 test_path_is_file c
 747         )
 748 '
 749
 750 test_setup_rename_rename_1to2_add_source_2 () {
 751         git init rename-rename-1to2-add-source-2 &&
 752         (
 753                 cd rename-rename-1to2-add-source-2 &&
 754
 755                 >a &&
 756                 git add a &&
 757                 test_tick &&
 758                 git commit -m base &&
 759                 git tag A &&
 760
 761                 git checkout -b B A &&
 762                 git mv a b &&
 763                 test_tick &&
 764                 git commit -m one &&
 765
 766                 git checkout -b C A &&
 767                 git mv a b &&
 768                 echo important-info >a &&
 769                 git add a &&
 770                 test_tick &&
 771                 git commit -m two
 772         )
 773 }
 774
 775 test_expect_failure 'rename/rename/add-source still tracks new a file' '
 776         test_setup_rename_rename_1to2_add_source_2 &&
 777         (
 778                 cd rename-rename-1to2-add-source-2 &&
 779
 780                 git checkout C^0 &&
 781                 git merge -s recursive B^0 &&
 782
 783                 git ls-files -s >out &&
 784                 test_line_count = 2 out &&
 785                 git ls-files -o >out &&
 786                 test_line_count = 1 out &&
 787
 788                 git rev-parse >expect \
 789                         C:a   A:a     &&
 790                 git rev-parse >actual \
 791                         :0:a  :0:b    &&
 792                 test_cmp expect actual
 793         )
 794 '
 795
 796 test_setup_rename_rename_1to2_add_dest () {
 797         git init rename-rename-1to2-add-dest &&
 798         (
 799                 cd rename-rename-1to2-add-dest &&
 800
 801                 echo stuff >a &&
 802                 git add a &&
 803                 test_tick &&
 804                 git commit -m base &&
 805                 git tag A &&
 806
 807                 git checkout -b B A &&
 808                 git mv a b &&
 809                 echo precious-data >c &&
 810                 git add c &&
 811                 test_tick &&
 812                 git commit -m one &&
 813
 814                 git checkout -b C A &&
 815                 git mv a c &&
 816                 echo important-info >b &&
 817                 git add b &&
 818                 test_tick &&
 819                 git commit -m two
 820         )
 821 }
 822
 823 test_expect_success 'rename/rename/add-dest merge still knows about conflicting file versions' '
 824         test_setup_rename_rename_1to2_add_dest &&
 825         (
 826                 cd rename-rename-1to2-add-dest &&
 827
 828                 git checkout C^0 &&
 829                 test_must_fail git merge -s recursive B^0 &&
 830
 831                 git ls-files -s >out &&
 832                 test_line_count = 5 out &&
 833                 git ls-files -u b >out &&
 834                 test_line_count = 2 out &&
 835                 git ls-files -u c >out &&
 836                 test_line_count = 2 out &&
 837                 git ls-files -o >out &&
 838                 test_line_count = 1 out &&
 839
 840                 git rev-parse >expect               \
 841                         A:a   C:b   B:b   C:c   B:c &&
 842                 git rev-parse >actual                \
 843                         :1:a  :2:b  :3:b  :2:c  :3:c &&
 844                 test_cmp expect actual &&
 845
 846                 # Record some contents for re-doing merges
 847                 git cat-file -p A:a >stuff &&
 848                 git cat-file -p C:b >important_info &&
 849                 git cat-file -p B:c >precious_data &&
 850                 >empty &&
 851
 852                 # Test the merge in b
 853                 test_must_fail git merge-file \
 854                         -L "HEAD" \
 855                         -L "" \
 856                         -L "B^0" \
 857                         important_info empty stuff &&
 858                 test_cmp important_info b &&
 859
 860                 # Test the merge in c
 861                 test_must_fail git merge-file \
 862                         -L "HEAD" \
 863                         -L "" \
 864                         -L "B^0" \
 865                         stuff empty precious_data &&
 866                 test_cmp stuff c
 867         )
 868 '
 869
 870 # Testcase rad, rename/add/delete
 871 #   Commit O: foo
 872 #   Commit A: rm foo, add different bar
 873 #   Commit B: rename foo->bar
 874 #   Expected: CONFLICT (rename/add/delete), two-way merged bar
 875
 876 test_setup_rad () {
 877         git init rad &&
 878         (
 879                 cd rad &&
 880                 echo "original file" >foo &&
 881                 git add foo &&
 882                 git commit -m "original" &&
 883
 884                 git branch O &&
 885                 git branch A &&
 886                 git branch B &&
 887
 888                 git checkout A &&
 889                 git rm foo &&
 890                 echo "different file" >bar &&
 891                 git add bar &&
 892                 git commit -m "Remove foo, add bar" &&
 893
 894                 git checkout B &&
 895                 git mv foo bar &&
 896                 git commit -m "rename foo to bar"
 897         )
 898 }
 899
 900 test_expect_merge_algorithm failure success 'rad-check: rename/add/delete conflict' '
 901         test_setup_rad &&
 902         (
 903                 cd rad &&
 904
 905                 git checkout B^0 &&
 906                 test_must_fail git merge -s recursive A^0 >out 2>err &&
 907
 908                 # Instead of requiring the output to contain one combined line
 909                 #   CONFLICT (rename/add/delete)
 910                 # or perhaps two lines:
 911                 #   CONFLICT (rename/add): new file collides with rename target
 912                 #   CONFLICT (rename/delete): rename source removed on other side
 913                 # and instead of requiring "rename/add" instead of "add/add",
 914                 # be flexible in the type of console output message(s) reported
 915                 # for this particular case; we will be more stringent about the
 916                 # contents of the index and working directory.
 917                 test_grep "CONFLICT (.*/add)" out &&
 918                 test_grep "CONFLICT (rename.*/delete)" out &&
 919                 test_must_be_empty err &&
 920
 921                 git ls-files -s >file_count &&
 922                 test_line_count = 2 file_count &&
 923                 git ls-files -u >file_count &&
 924                 test_line_count = 2 file_count &&
 925                 git ls-files -o >file_count &&
 926                 test_line_count = 3 file_count &&
 927
 928                 git rev-parse >actual \
 929                         :2:bar :3:bar &&
 930                 git rev-parse >expect \
 931                         B:bar  A:bar  &&
 932
 933                 test_path_is_missing foo &&
 934                 # bar should have two-way merged contents of the different
 935                 # versions of bar; check that content from both sides is
 936                 # present.
 937                 grep original bar &&
 938                 grep different bar
 939         )
 940 '
 941
 942 # Testcase rrdd, rename/rename(2to1)/delete/delete
 943 #   Commit O: foo, bar
 944 #   Commit A: rename foo->baz, rm bar
 945 #   Commit B: rename bar->baz, rm foo
 946 #   Expected: CONFLICT (rename/rename/delete/delete), two-way merged baz
 947
 948 test_setup_rrdd () {
 949         git init rrdd &&
 950         (
 951                 cd rrdd &&
 952                 echo foo >foo &&
 953                 echo bar >bar &&
 954                 git add foo bar &&
 955                 git commit -m O &&
 956
 957                 git branch O &&
 958                 git branch A &&
 959                 git branch B &&
 960
 961                 git checkout A &&
 962                 git mv foo baz &&
 963                 git rm bar &&
 964                 git commit -m "Rename foo, remove bar" &&
 965
 966                 git checkout B &&
 967                 git mv bar baz &&
 968                 git rm foo &&
 969                 git commit -m "Rename bar, remove foo"
 970         )
 971 }
 972
 973 test_expect_merge_algorithm failure success 'rrdd-check: rename/rename(2to1)/delete/delete conflict' '
 974         test_setup_rrdd &&
 975         (
 976                 cd rrdd &&
 977
 978                 git checkout A^0 &&
 979                 test_must_fail git merge -s recursive B^0 >out 2>err &&
 980
 981                 # Instead of requiring the output to contain one combined line
 982                 #   CONFLICT (rename/rename/delete/delete)
 983                 # or perhaps two lines:
 984                 #   CONFLICT (rename/rename): ...
 985                 #   CONFLICT (rename/delete): info about pair 1
 986                 #   CONFLICT (rename/delete): info about pair 2
 987                 # and instead of requiring "rename/rename" instead of "add/add",
 988                 # be flexible in the type of console output message(s) reported
 989                 # for this particular case; we will be more stringent about the
 990                 # contents of the index and working directory.
 991                 test_grep "CONFLICT (\(.*\)/\1)" out &&
 992                 test_grep "CONFLICT (rename.*delete)" out &&
 993                 test_must_be_empty err &&
 994
 995                 git ls-files -s >file_count &&
 996                 test_line_count = 2 file_count &&
 997                 git ls-files -u >file_count &&
 998                 test_line_count = 2 file_count &&
 999                 git ls-files -o >file_count &&
1000                 test_line_count = 3 file_count &&
1001
1002                 git rev-parse >actual \
1003                         :2:baz :3:baz &&
1004                 git rev-parse >expect \
1005                         O:foo  O:bar  &&
1006
1007                 test_path_is_missing foo &&
1008                 test_path_is_missing bar &&
1009                 # baz should have two-way merged contents of the original
1010                 # contents of foo and bar; check that content from both sides
1011                 # is present.
1012                 grep foo baz &&
1013                 grep bar baz
1014         )
1015 '
1016
1017 # Testcase mod6, chains of rename/rename(1to2) and rename/rename(2to1)
1018 #   Commit O: one,      three,       five
1019 #   Commit A: one->two, three->four, five->six
1020 #   Commit B: one->six, three->two,  five->four
1021 #   Expected: six CONFLICT(rename/rename) messages, each path in two of the
1022 #             multi-way merged contents found in two, four, six
1023
1024 test_setup_mod6 () {
1025         git init mod6 &&
1026         (
1027                 cd mod6 &&
1028                 test_seq 11 19 >one &&
1029                 test_seq 31 39 >three &&
1030                 test_seq 51 59 >five &&
1031                 git add . &&
1032                 test_tick &&
1033                 git commit -m "O" &&
1034
1035                 git branch O &&
1036                 git branch A &&
1037                 git branch B &&
1038
1039                 git checkout A &&
1040                 test_seq 10 19 >one &&
1041                 echo 40        >>three &&
1042                 git add one three &&
1043                 git mv  one   two  &&
1044                 git mv  three four &&
1045                 git mv  five  six  &&
1046                 test_tick &&
1047                 git commit -m "A" &&
1048
1049                 git checkout B &&
1050                 echo 20    >>one       &&
1051                 echo forty >>three     &&
1052                 echo 60    >>five      &&
1053                 git add one three five &&
1054                 git mv  one   six  &&
1055                 git mv  three two  &&
1056                 git mv  five  four &&
1057                 test_tick &&
1058                 git commit -m "B"
1059         )
1060 }
1061
1062 test_expect_merge_algorithm failure success 'mod6-check: chains of rename/rename(1to2) and rename/rename(2to1)' '
1063         test_setup_mod6 &&
1064         (
1065                 cd mod6 &&
1066
1067                 git checkout A^0 &&
1068
1069                 test_must_fail git merge -s recursive B^0 >out 2>err &&
1070
1071                 test_grep "CONFLICT (rename/rename)" out &&
1072                 test_must_be_empty err &&
1073
1074                 git ls-files -s >file_count &&
1075                 test_line_count = 9 file_count &&
1076                 git ls-files -u >file_count &&
1077                 test_line_count = 9 file_count &&
1078                 git ls-files -o >file_count &&
1079                 test_line_count = 3 file_count &&
1080
1081                 test_seq 10 20 >merged-one &&
1082                 test_seq 51 60 >merged-five &&
1083                 # Determine what the merge of three would give us.
1084                 test_seq 31 39 >three-base &&
1085                 test_seq 31 40 >three-side-A &&
1086                 test_seq 31 39 >three-side-B &&
1087                 echo forty >>three-side-B &&
1088                 test_must_fail git merge-file \
1089                         -L "HEAD:four" \
1090                         -L "" \
1091                         -L "B^0:two" \
1092                         three-side-A three-base three-side-B &&
1093                 sed -e "s/^\([<=>]\)/\1\1/" three-side-A >merged-three &&
1094
1095                 # Verify the index is as expected
1096                 git rev-parse >actual         \
1097                         :2:two       :3:two   \
1098                         :2:four      :3:four  \
1099                         :2:six       :3:six   &&
1100                 git hash-object >expect           \
1101                         merged-one   merged-three \
1102                         merged-three merged-five  \
1103                         merged-five  merged-one   &&
1104                 test_cmp expect actual &&
1105
1106                 git cat-file -p :2:two >expect &&
1107                 git cat-file -p :3:two >other &&
1108                 >empty &&
1109                 test_must_fail git merge-file    \
1110                         -L "HEAD"  -L ""  -L "B^0" \
1111                         expect     empty  other &&
1112                 test_cmp expect two &&
1113
1114                 git cat-file -p :2:four >expect &&
1115                 git cat-file -p :3:four >other &&
1116                 test_must_fail git merge-file    \
1117                         -L "HEAD"  -L ""  -L "B^0" \
1118                         expect     empty  other &&
1119                 test_cmp expect four &&
1120
1121                 git cat-file -p :2:six >expect &&
1122                 git cat-file -p :3:six >other &&
1123                 test_must_fail git merge-file    \
1124                         -L "HEAD"  -L ""  -L "B^0" \
1125                         expect     empty  other &&
1126                 test_cmp expect six
1127         )
1128 '
1129
1130 test_conflicts_with_adds_and_renames() {
1131         sideL=$1
1132         sideR=$2
1133
1134         # Setup:
1135         #          L
1136         #         / \
1137         #     main   ?
1138         #         \ /
1139         #          R
1140         #
1141         # Where:
1142         #   Both L and R have files named 'three' which collide.  Each of
1143         #   the colliding files could have been involved in a rename, in
1144         #   which case there was a file named 'one' or 'two' that was
1145         #   modified on the opposite side of history and renamed into the
1146         #   collision on this side of history.
1147         #
1148         # Questions:
1149         #   1) The index should contain both a stage 2 and stage 3 entry
1150         #      for the colliding file.  Does it?
1151         #   2) When renames are involved, the content merges are clean, so
1152         #      the index should reflect the content merges, not merely the
1153         #      version of the colliding file from the prior commit.  Does
1154         #      it?
1155         #   3) There should be a file in the worktree named 'three'
1156         #      containing the two-way merged contents of the content-merged
1157         #      versions of 'three' from each of the two colliding
1158         #      files.  Is it present?
1159         #   4) There should not be any three~* files in the working
1160         #      tree
1161         test_setup_collision_conflict () {
1162                 git init simple_${sideL}_${sideR} &&
1163                 (
1164                         cd simple_${sideL}_${sideR} &&
1165
1166                         # Create some related files now
1167                         for i in $(test_seq 1 10)
1168                         do
1169                                 echo Random base content line $i
1170                         done >file_v1 &&
1171                         cp file_v1 file_v2 &&
1172                         echo modification >>file_v2 &&
1173
1174                         cp file_v1 file_v3 &&
1175                         echo more stuff >>file_v3 &&
1176                         cp file_v3 file_v4 &&
1177                         echo yet more stuff >>file_v4 &&
1178
1179                         # Use a tag to record both these files for simple
1180                         # access, and clean out these untracked files
1181                         git tag file_v1 $(git hash-object -w file_v1) &&
1182                         git tag file_v2 $(git hash-object -w file_v2) &&
1183                         git tag file_v3 $(git hash-object -w file_v3) &&
1184                         git tag file_v4 $(git hash-object -w file_v4) &&
1185                         git clean -f &&
1186
1187                         # Setup original commit (or merge-base), consisting of
1188                         # files named "one" and "two" if renames were involved.
1189                         touch irrelevant_file &&
1190                         git add irrelevant_file &&
1191                         if [ $sideL = "rename" ]
1192                         then
1193                                 git show file_v1 >one &&
1194                                 git add one
1195                         fi &&
1196                         if [ $sideR = "rename" ]
1197                         then
1198                                 git show file_v3 >two &&
1199                                 git add two
1200                         fi &&
1201                         test_tick && git commit -m initial &&
1202
1203                         git branch L &&
1204                         git branch R &&
1205
1206                         # Handle the left side
1207                         git checkout L &&
1208                         if [ $sideL = "rename" ]
1209                         then
1210                                 git mv one three
1211                         else
1212                                 git show file_v2 >three &&
1213                                 git add three
1214                         fi &&
1215                         if [ $sideR = "rename" ]
1216                         then
1217                                 git show file_v4 >two &&
1218                                 git add two
1219                         fi &&
1220                         test_tick && git commit -m L &&
1221
1222                         # Handle the right side
1223                         git checkout R &&
1224                         if [ $sideL = "rename" ]
1225                         then
1226                                 git show file_v2 >one &&
1227                                 git add one
1228                         fi &&
1229                         if [ $sideR = "rename" ]
1230                         then
1231                                 git mv two three
1232                         else
1233                                 git show file_v4 >three &&
1234                                 git add three
1235                         fi &&
1236                         test_tick && git commit -m R
1237                 )
1238         }
1239
1240         test_expect_success "check simple $sideL/$sideR conflict" '
1241                 test_setup_collision_conflict &&
1242                 (
1243                         cd simple_${sideL}_${sideR} &&
1244
1245                         git checkout L^0 &&
1246
1247                         # Merge must fail; there is a conflict
1248                         test_must_fail git merge -s recursive R^0 &&
1249
1250                         # Make sure the index has the right number of entries
1251                         git ls-files -s >out &&
1252                         test_line_count = 3 out &&
1253                         git ls-files -u >out &&
1254                         test_line_count = 2 out &&
1255                         # Ensure we have the correct number of untracked files
1256                         git ls-files -o >out &&
1257                         test_line_count = 1 out &&
1258
1259                         # Nothing should have touched irrelevant_file
1260                         git rev-parse >actual      \
1261                                 :0:irrelevant_file \
1262                                 :2:three           \
1263                                 :3:three           &&
1264                         git rev-parse >expected        \
1265                                 main:irrelevant_file \
1266                                 file_v2                \
1267                                 file_v4                &&
1268                         test_cmp expected actual &&
1269
1270                         # Make sure we have the correct merged contents for
1271                         # three
1272                         git show file_v1 >expected &&
1273                         cat <<-\EOF >>expected &&
1274                         <<<<<<< HEAD
1275                         modification
1276                         =======
1277                         more stuff
1278                         yet more stuff
1279                         >>>>>>> R^0
1280                         EOF
1281
1282                         test_cmp expected three
1283                 )
1284         '
1285 }
1286
1287 test_conflicts_with_adds_and_renames rename rename
1288 test_conflicts_with_adds_and_renames rename add
1289 test_conflicts_with_adds_and_renames add    rename
1290 test_conflicts_with_adds_and_renames add    add
1291
1292 # Setup:
1293 #          L
1294 #         / \
1295 #     main   ?
1296 #         \ /
1297 #          R
1298 #
1299 # Where:
1300 #   main has two files, named 'one' and 'two'.
1301 #   branches L and R both modify 'one', in conflicting ways.
1302 #   branches L and R both modify 'two', in conflicting ways.
1303 #   branch L also renames 'one' to 'three'.
1304 #   branch R also renames 'two' to 'three'.
1305 #
1306 #   So, we have four different conflicting files that all end up at path
1307 #   'three'.
1308 test_setup_nested_conflicts_from_rename_rename () {
1309         git init nested_conflicts_from_rename_rename &&
1310         (
1311                 cd nested_conflicts_from_rename_rename &&
1312
1313                 # Create some related files now
1314                 for i in $(test_seq 1 10)
1315                 do
1316                         echo Random base content line $i
1317                 done >file_v1 &&
1318
1319                 cp file_v1 file_v2 &&
1320                 cp file_v1 file_v3 &&
1321                 cp file_v1 file_v4 &&
1322                 cp file_v1 file_v5 &&
1323                 cp file_v1 file_v6 &&
1324
1325                 echo one  >>file_v1 &&
1326                 echo uno  >>file_v2 &&
1327                 echo eins >>file_v3 &&
1328
1329                 echo two  >>file_v4 &&
1330                 echo dos  >>file_v5 &&
1331                 echo zwei >>file_v6 &&
1332
1333                 # Setup original commit (or merge-base), consisting of
1334                 # files named "one" and "two".
1335                 mv file_v1 one &&
1336                 mv file_v4 two &&
1337                 git add one two &&
1338                 test_tick && git commit -m english &&
1339
1340                 git branch L &&
1341                 git branch R &&
1342
1343                 # Handle the left side
1344                 git checkout L &&
1345                 git rm one two &&
1346                 mv -f file_v2 three &&
1347                 mv -f file_v5 two &&
1348                 git add two three &&
1349                 test_tick && git commit -m spanish &&
1350
1351                 # Handle the right side
1352                 git checkout R &&
1353                 git rm one two &&
1354                 mv -f file_v3 one &&
1355                 mv -f file_v6 three &&
1356                 git add one three &&
1357                 test_tick && git commit -m german
1358         )
1359 }
1360
1361 test_expect_success 'check nested conflicts from rename/rename(2to1)' '
1362         test_setup_nested_conflicts_from_rename_rename &&
1363         (
1364                 cd nested_conflicts_from_rename_rename &&
1365
1366                 git checkout L^0 &&
1367
1368                 # Merge must fail; there is a conflict
1369                 test_must_fail git merge -s recursive R^0 &&
1370
1371                 # Make sure the index has the right number of entries
1372                 git ls-files -s >out &&
1373                 test_line_count = 2 out &&
1374                 git ls-files -u >out &&
1375                 test_line_count = 2 out &&
1376                 # Ensure we have the correct number of untracked files
1377                 git ls-files -o >out &&
1378                 test_line_count = 1 out &&
1379
1380                 # Compare :2:three to expected values
1381                 git cat-file -p main:one >base &&
1382                 git cat-file -p L:three >ours &&
1383                 git cat-file -p R:one >theirs &&
1384                 test_must_fail git merge-file    \
1385                         -L "HEAD:three"  -L ""  -L "R^0:one" \
1386                         ours             base   theirs &&
1387                 sed -e "s/^\([<=>]\)/\1\1/" ours >L-three &&
1388                 git cat-file -p :2:three >expect &&
1389                 test_cmp expect L-three &&
1390
1391                 # Compare :2:three to expected values
1392                 git cat-file -p main:two >base &&
1393                 git cat-file -p L:two >ours &&
1394                 git cat-file -p R:three >theirs &&
1395                 test_must_fail git merge-file    \
1396                         -L "HEAD:two"  -L ""  -L "R^0:three" \
1397                         ours           base   theirs &&
1398                 sed -e "s/^\([<=>]\)/\1\1/" ours >R-three &&
1399                 git cat-file -p :3:three >expect &&
1400                 test_cmp expect R-three &&
1401
1402                 # Compare three to expected contents
1403                 >empty &&
1404                 test_must_fail git merge-file    \
1405                         -L "HEAD"  -L ""  -L "R^0" \
1406                         L-three    empty  R-three &&
1407                 test_cmp three L-three
1408         )
1409 '
1410
1411 # Testcase rename/rename(1to2) of a binary file
1412 #   Commit O: orig
1413 #   Commit A: orig-A
1414 #   Commit B: orig-B
1415 #   Expected: CONFLICT(rename/rename) message, three unstaged entries in the
1416 #             index, and contents of orig-[AB] at path orig-[AB]
1417 test_setup_rename_rename_1_to_2_binary () {
1418         git init rename_rename_1_to_2_binary &&
1419         (
1420                 cd rename_rename_1_to_2_binary &&
1421
1422                 echo '* binary' >.gitattributes &&
1423                 git add .gitattributes &&
1424
1425                 test_seq 1 10 >orig &&
1426                 git add orig &&
1427                 git commit -m orig &&
1428
1429                 git branch A &&
1430                 git branch B &&
1431
1432                 git checkout A &&
1433                 git mv orig orig-A &&
1434                 test_seq 1 11 >orig-A &&
1435                 git add orig-A &&
1436                 git commit -m orig-A &&
1437
1438                 git checkout B &&
1439                 git mv orig orig-B &&
1440                 test_seq 0 10 >orig-B &&
1441                 git add orig-B &&
1442                 git commit -m orig-B
1443
1444         )
1445 }
1446
1447 test_expect_success 'rename/rename(1to2) with a binary file' '
1448         test_setup_rename_rename_1_to_2_binary &&
1449         (
1450                 cd rename_rename_1_to_2_binary &&
1451
1452                 git checkout A^0 &&
1453
1454                 test_must_fail git merge -s recursive B^0 &&
1455
1456                 # Make sure the index has the right number of entries
1457                 git ls-files -s >actual &&
1458                 test_line_count = 4 actual &&
1459
1460                 git rev-parse A:orig-A B:orig-B >expect &&
1461                 git hash-object orig-A orig-B >actual &&
1462                 test_cmp expect actual
1463         )
1464 '
1465
1466 test_done