t/t7600-merge.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2007 Lars Hjemli
   4 #
   5
   6 test_description='git merge
   7
   8 Testing basic merge operations/option parsing.
   9
  10 ! [c0] commit 0
  11  ! [c1] commit 1
  12   ! [c2] commit 2
  13    ! [c3] commit 3
  14     ! [c4] c4
  15      ! [c5] c5
  16       ! [c6] c6
  17        * [main] Merge commit 'c1'
  18 --------
  19        - [main] Merge commit 'c1'
  20  +     * [c1] commit 1
  21       +  [c6] c6
  22      +   [c5] c5
  23     ++   [c4] c4
  24    ++++  [c3] commit 3
  25   +      [c2] commit 2
  26 +++++++* [c0] commit 0
  27 '
  28
  29 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  30 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  31
  32 . ./test-lib.sh
  33 . "$TEST_DIRECTORY"/lib-gpg.sh
  34
  35 test_write_lines 1 2 3 4 5 6 7 8 9 >file
  36 cp file file.orig
  37 test_write_lines '1 X' 2 3 4 5 6 7 8 9 >file.1
  38 test_write_lines 1 2 '3 X' 4 5 6 7 8 9 >file.3
  39 test_write_lines 1 2 3 4 '5 X' 6 7 8 9 >file.5
  40 test_write_lines 1 2 3 4 5 6 7 8 '9 X' >file.9
  41 test_write_lines 1 2 3 4 5 6 7 8 '9 Y' >file.9y
  42 test_write_lines '1 X' 2 3 4 5 6 7 8 9 >result.1
  43 test_write_lines '1 X' 2 3 4 '5 X' 6 7 8 9 >result.1-5
  44 test_write_lines '1 X' 2 3 4 5 6 7 8 '9 X' >result.1-9
  45 test_write_lines '1 X' 2 3 4 '5 X' 6 7 8 '9 X' >result.1-5-9
  46 test_write_lines '1 X' 2 '3 X' 4 '5 X' 6 7 8 '9 X' >result.1-3-5-9
  47 test_write_lines 1 2 3 4 5 6 7 8 '9 Z' >result.9z
  48
  49 create_merge_msgs () {
  50         echo "Merge tag 'c2'" >msg.1-5 &&
  51         echo "Merge tags 'c2' and 'c3'" >msg.1-5-9 &&
  52         {
  53                 echo "Squashed commit of the following:" &&
  54                 echo &&
  55                 git log --no-merges ^HEAD c1
  56         } >squash.1 &&
  57         {
  58                 echo "Squashed commit of the following:" &&
  59                 echo &&
  60                 git log --no-merges ^HEAD c2
  61         } >squash.1-5 &&
  62         {
  63                 echo "Squashed commit of the following:" &&
  64                 echo &&
  65                 git log --no-merges ^HEAD c2 c3
  66         } >squash.1-5-9 &&
  67         {
  68                 echo "* tag 'c3':" &&
  69                 echo "  commit 3"
  70         } >msg.log
  71 }
  72
  73 verify_merge () {
  74         test_cmp "$2" "$1" &&
  75         git update-index --refresh &&
  76         git diff --exit-code &&
  77         if test -n "$3"
  78         then
  79                 git show -s --pretty=tformat:%s HEAD >msg.act &&
  80                 test_cmp "$3" msg.act
  81         fi
  82 }
  83
  84 verify_head () {
  85         echo "$1" >head.expected &&
  86         git rev-parse HEAD >head.actual &&
  87         test_cmp head.expected head.actual
  88 }
  89
  90 verify_parents () {
  91         test_write_lines "$@" >parents.expected &&
  92         >parents.actual &&
  93         i=1 &&
  94         while test $i -le $#
  95         do
  96                 git rev-parse HEAD^$i >>parents.actual &&
  97                 i=$(expr $i + 1) ||
  98                 return 1
  99         done &&
 100         test_must_fail git rev-parse --verify "HEAD^$i" &&
 101         test_cmp parents.expected parents.actual
 102 }
 103
 104 verify_mergeheads () {
 105         test_write_lines "$@" >mergehead.expected &&
 106         while read sha1 rest
 107         do
 108                 git rev-parse $sha1
 109         done <.git/MERGE_HEAD >mergehead.actual &&
 110         test_cmp mergehead.expected mergehead.actual
 111 }
 112
 113 verify_no_mergehead () {
 114         ! test -e .git/MERGE_HEAD
 115 }
 116
 117 test_expect_success 'setup' '
 118         git add file &&
 119         test_tick &&
 120         git commit -m "commit 0" &&
 121         git tag c0 &&
 122         c0=$(git rev-parse HEAD) &&
 123         cp file.1 file &&
 124         git add file &&
 125         cp file.1 other &&
 126         git add other &&
 127         test_tick &&
 128         git commit -m "commit 1" &&
 129         git tag c1 &&
 130         c1=$(git rev-parse HEAD) &&
 131         git reset --hard "$c0" &&
 132         cp file.5 file &&
 133         git add file &&
 134         test_tick &&
 135         git commit -m "commit 2" &&
 136         git tag c2 &&
 137         c2=$(git rev-parse HEAD) &&
 138         git reset --hard "$c0" &&
 139         cp file.9y file &&
 140         git add file &&
 141         test_tick &&
 142         git commit -m "commit 7" &&
 143         git tag c7 &&
 144         git reset --hard "$c0" &&
 145         cp file.9 file &&
 146         git add file &&
 147         test_tick &&
 148         git commit -m "commit 3" &&
 149         git tag c3 &&
 150         c3=$(git rev-parse HEAD) &&
 151         git reset --hard "$c0" &&
 152         create_merge_msgs
 153 '
 154
 155 test_debug 'git log --graph --decorate --oneline --all'
 156
 157 test_expect_success 'test option parsing' '
 158         test_must_fail git merge -$ c1 &&
 159         test_must_fail git merge --no-such c1 &&
 160         test_must_fail git merge -s foobar c1 &&
 161         test_must_fail git merge -s=foobar c1 &&
 162         test_must_fail git merge -m &&
 163         test_must_fail git merge --abort foobar &&
 164         test_must_fail git merge --abort --quiet &&
 165         test_must_fail git merge --continue foobar &&
 166         test_must_fail git merge --continue --quiet &&
 167         test_must_fail git merge
 168 '
 169
 170 test_expect_success 'merge -h with invalid index' '
 171         mkdir broken &&
 172         (
 173                 cd broken &&
 174                 git init &&
 175                 >.git/index &&
 176                 test_expect_code 129 git merge -h 2>usage
 177         ) &&
 178         test_i18ngrep "[Uu]sage: git merge" broken/usage
 179 '
 180
 181 test_expect_success 'reject non-strategy with a git-merge-foo name' '
 182         test_must_fail git merge -s index c1
 183 '
 184
 185 test_expect_success 'merge c0 with c1' '
 186         echo "OBJID HEAD@{0}: merge c1: Fast-forward" >reflog.expected &&
 187
 188         git reset --hard c0 &&
 189         git merge c1 &&
 190         verify_merge file result.1 &&
 191         verify_head "$c1" &&
 192
 193         git reflog -1 >reflog.actual &&
 194         sed "s/$_x05[0-9a-f]*/OBJID/g" reflog.actual >reflog.fuzzy &&
 195         test_cmp reflog.expected reflog.fuzzy
 196 '
 197
 198 test_debug 'git log --graph --decorate --oneline --all'
 199
 200 test_expect_success 'merge c0 with c1 with --ff-only' '
 201         git reset --hard c0 &&
 202         git merge --ff-only c1 &&
 203         git merge --ff-only HEAD c0 c1 &&
 204         verify_merge file result.1 &&
 205         verify_head "$c1"
 206 '
 207
 208 test_debug 'git log --graph --decorate --oneline --all'
 209
 210 test_expect_success 'merge from unborn branch' '
 211         git checkout -f main &&
 212         test_might_fail git branch -D kid &&
 213
 214         echo "OBJID HEAD@{0}: initial pull" >reflog.expected &&
 215
 216         git checkout --orphan kid &&
 217         test_when_finished "git checkout -f main" &&
 218         git rm -fr . &&
 219         test_tick &&
 220         git merge --ff-only c1 &&
 221         verify_merge file result.1 &&
 222         verify_head "$c1" &&
 223
 224         git reflog -1 >reflog.actual &&
 225         sed "s/$_x05[0-9a-f][0-9a-f]/OBJID/g" reflog.actual >reflog.fuzzy &&
 226         test_cmp reflog.expected reflog.fuzzy
 227 '
 228
 229 test_debug 'git log --graph --decorate --oneline --all'
 230
 231 test_expect_success 'merge c1 with c2' '
 232         git reset --hard c1 &&
 233         test_tick &&
 234         git merge c2 &&
 235         verify_merge file result.1-5 msg.1-5 &&
 236         verify_parents $c1 $c2
 237 '
 238
 239 test_expect_success 'merge --squash c3 with c7' '
 240         git reset --hard c3 &&
 241         test_must_fail git merge --squash c7 &&
 242         cat result.9z >file &&
 243         git commit --no-edit -a &&
 244
 245         cat >expect <<-EOF &&
 246         Squashed commit of the following:
 247
 248         $(git show -s c7)
 249
 250         # Conflicts:
 251         #       file
 252         EOF
 253         git cat-file commit HEAD >raw &&
 254         sed -e "1,/^$/d" raw >actual &&
 255         test_cmp expect actual
 256 '
 257
 258 test_expect_success 'merge c3 with c7 with commit.cleanup = scissors' '
 259         git config commit.cleanup scissors &&
 260         git reset --hard c3 &&
 261         test_must_fail git merge c7 &&
 262         cat result.9z >file &&
 263         git commit --no-edit -a &&
 264
 265         cat >expect <<-\EOF &&
 266         Merge tag '"'"'c7'"'"'
 267
 268         # ------------------------ >8 ------------------------
 269         # Do not modify or remove the line above.
 270         # Everything below it will be ignored.
 271         #
 272         # Conflicts:
 273         #       file
 274         EOF
 275         git cat-file commit HEAD >raw &&
 276         sed -e "1,/^$/d" raw >actual &&
 277         test_cmp expect actual
 278 '
 279
 280 test_expect_success 'merge c3 with c7 with --squash commit.cleanup = scissors' '
 281         git config commit.cleanup scissors &&
 282         git reset --hard c3 &&
 283         test_must_fail git merge --squash c7 &&
 284         cat result.9z >file &&
 285         git commit --no-edit -a &&
 286
 287         cat >expect <<-EOF &&
 288         Squashed commit of the following:
 289
 290         $(git show -s c7)
 291
 292         # ------------------------ >8 ------------------------
 293         # Do not modify or remove the line above.
 294         # Everything below it will be ignored.
 295         #
 296         # Conflicts:
 297         #       file
 298         EOF
 299         git cat-file commit HEAD >raw &&
 300         sed -e "1,/^$/d" raw >actual &&
 301         test_cmp expect actual
 302 '
 303
 304 test_debug 'git log --graph --decorate --oneline --all'
 305
 306 test_expect_success 'merge c1 with c2 and c3' '
 307         git reset --hard c1 &&
 308         test_tick &&
 309         git merge c2 c3 &&
 310         verify_merge file result.1-5-9 msg.1-5-9 &&
 311         verify_parents $c1 $c2 $c3
 312 '
 313
 314 test_debug 'git log --graph --decorate --oneline --all'
 315
 316 test_expect_success 'merges with --ff-only' '
 317         git reset --hard c1 &&
 318         test_tick &&
 319         test_must_fail git merge --ff-only c2 &&
 320         test_must_fail git merge --ff-only c3 &&
 321         test_must_fail git merge --ff-only c2 c3 &&
 322         git reset --hard c0 &&
 323         git merge c3 &&
 324         verify_head $c3
 325 '
 326
 327 test_expect_success 'merges with merge.ff=only' '
 328         git reset --hard c1 &&
 329         test_tick &&
 330         test_config merge.ff "only" &&
 331         test_must_fail git merge c2 &&
 332         test_must_fail git merge c3 &&
 333         test_must_fail git merge c2 c3 &&
 334         git reset --hard c0 &&
 335         git merge c3 &&
 336         verify_head $c3
 337 '
 338
 339 test_expect_success 'merge c0 with c1 (no-commit)' '
 340         git reset --hard c0 &&
 341         git merge --no-commit c1 &&
 342         verify_merge file result.1 &&
 343         verify_head $c1
 344 '
 345
 346 test_debug 'git log --graph --decorate --oneline --all'
 347
 348 test_expect_success 'merge c1 with c2 (no-commit)' '
 349         git reset --hard c1 &&
 350         git merge --no-commit c2 &&
 351         verify_merge file result.1-5 &&
 352         verify_head $c1 &&
 353         verify_mergeheads $c2
 354 '
 355
 356 test_debug 'git log --graph --decorate --oneline --all'
 357
 358 test_expect_success 'merge c1 with c2 and c3 (no-commit)' '
 359         git reset --hard c1 &&
 360         git merge --no-commit c2 c3 &&
 361         verify_merge file result.1-5-9 &&
 362         verify_head $c1 &&
 363         verify_mergeheads $c2 $c3
 364 '
 365
 366 test_debug 'git log --graph --decorate --oneline --all'
 367
 368 test_expect_success 'merge c0 with c1 (squash)' '
 369         git reset --hard c0 &&
 370         git merge --squash c1 &&
 371         verify_merge file result.1 &&
 372         verify_head $c0 &&
 373         verify_no_mergehead &&
 374         test_cmp squash.1 .git/SQUASH_MSG
 375 '
 376
 377 test_debug 'git log --graph --decorate --oneline --all'
 378
 379 test_expect_success 'merge c0 with c1 (squash, ff-only)' '
 380         git reset --hard c0 &&
 381         git merge --squash --ff-only c1 &&
 382         verify_merge file result.1 &&
 383         verify_head $c0 &&
 384         verify_no_mergehead &&
 385         test_cmp squash.1 .git/SQUASH_MSG
 386 '
 387
 388 test_debug 'git log --graph --decorate --oneline --all'
 389
 390 test_expect_success 'merge c1 with c2 (squash)' '
 391         git reset --hard c1 &&
 392         git merge --squash c2 &&
 393         verify_merge file result.1-5 &&
 394         verify_head $c1 &&
 395         verify_no_mergehead &&
 396         test_cmp squash.1-5 .git/SQUASH_MSG
 397 '
 398
 399 test_debug 'git log --graph --decorate --oneline --all'
 400
 401 test_expect_success 'unsuccessful merge of c1 with c2 (squash, ff-only)' '
 402         git reset --hard c1 &&
 403         test_must_fail git merge --squash --ff-only c2
 404 '
 405
 406 test_debug 'git log --graph --decorate --oneline --all'
 407
 408 test_expect_success 'merge c1 with c2 and c3 (squash)' '
 409         git reset --hard c1 &&
 410         git merge --squash c2 c3 &&
 411         verify_merge file result.1-5-9 &&
 412         verify_head $c1 &&
 413         verify_no_mergehead &&
 414         test_cmp squash.1-5-9 .git/SQUASH_MSG
 415 '
 416
 417 test_debug 'git log --graph --decorate --oneline --all'
 418
 419 test_expect_success 'merge c1 with c2 (no-commit in config)' '
 420         git reset --hard c1 &&
 421         test_config branch.main.mergeoptions "--no-commit" &&
 422         git merge c2 &&
 423         verify_merge file result.1-5 &&
 424         verify_head $c1 &&
 425         verify_mergeheads $c2
 426 '
 427
 428 test_debug 'git log --graph --decorate --oneline --all'
 429
 430 test_expect_success 'merge c1 with c2 (log in config)' '
 431         git reset --hard c1 &&
 432         git merge --log c2 &&
 433         git show -s --pretty=tformat:%s%n%b >expect &&
 434
 435         test_config branch.main.mergeoptions "--log" &&
 436         git reset --hard c1 &&
 437         git merge c2 &&
 438         git show -s --pretty=tformat:%s%n%b >actual &&
 439
 440         test_cmp expect actual
 441 '
 442
 443 test_expect_success 'merge c1 with c2 (log in config gets overridden)' '
 444         git reset --hard c1 &&
 445         git merge c2 &&
 446         git show -s --pretty=tformat:%s%n%b >expect &&
 447
 448         test_config branch.main.mergeoptions "--no-log" &&
 449         test_config merge.log "true" &&
 450         git reset --hard c1 &&
 451         git merge c2 &&
 452         git show -s --pretty=tformat:%s%n%b >actual &&
 453
 454         test_cmp expect actual
 455 '
 456
 457 test_expect_success 'merge c1 with c2 (squash in config)' '
 458         git reset --hard c1 &&
 459         test_config branch.main.mergeoptions "--squash" &&
 460         git merge c2 &&
 461         verify_merge file result.1-5 &&
 462         verify_head $c1 &&
 463         verify_no_mergehead &&
 464         test_cmp squash.1-5 .git/SQUASH_MSG
 465 '
 466
 467 test_debug 'git log --graph --decorate --oneline --all'
 468
 469 test_expect_success 'override config option -n with --summary' '
 470         git reset --hard c1 &&
 471         test_config branch.main.mergeoptions "-n" &&
 472         test_tick &&
 473         git merge --summary c2 >diffstat.txt &&
 474         verify_merge file result.1-5 msg.1-5 &&
 475         verify_parents $c1 $c2 &&
 476         if ! grep "^ file |  *2 +-$" diffstat.txt
 477         then
 478                 echo "[OOPS] diffstat was not generated with --summary"
 479                 false
 480         fi
 481 '
 482
 483 test_expect_success 'override config option -n with --stat' '
 484         git reset --hard c1 &&
 485         test_config branch.main.mergeoptions "-n" &&
 486         test_tick &&
 487         git merge --stat c2 >diffstat.txt &&
 488         verify_merge file result.1-5 msg.1-5 &&
 489         verify_parents $c1 $c2 &&
 490         if ! grep "^ file |  *2 +-$" diffstat.txt
 491         then
 492                 echo "[OOPS] diffstat was not generated with --stat"
 493                 false
 494         fi
 495 '
 496
 497 test_debug 'git log --graph --decorate --oneline --all'
 498
 499 test_expect_success 'override config option --stat' '
 500         git reset --hard c1 &&
 501         test_config branch.main.mergeoptions "--stat" &&
 502         test_tick &&
 503         git merge -n c2 >diffstat.txt &&
 504         verify_merge file result.1-5 msg.1-5 &&
 505         verify_parents $c1 $c2 &&
 506         if grep "^ file |  *2 +-$" diffstat.txt
 507         then
 508                 echo "[OOPS] diffstat was generated"
 509                 false
 510         fi
 511 '
 512
 513 test_debug 'git log --graph --decorate --oneline --all'
 514
 515 test_expect_success 'merge c1 with c2 (override --no-commit)' '
 516         git reset --hard c1 &&
 517         test_config branch.main.mergeoptions "--no-commit" &&
 518         test_tick &&
 519         git merge --commit c2 &&
 520         verify_merge file result.1-5 msg.1-5 &&
 521         verify_parents $c1 $c2
 522 '
 523
 524 test_debug 'git log --graph --decorate --oneline --all'
 525
 526 test_expect_success 'merge c1 with c2 (override --squash)' '
 527         git reset --hard c1 &&
 528         test_config branch.main.mergeoptions "--squash" &&
 529         test_tick &&
 530         git merge --no-squash c2 &&
 531         verify_merge file result.1-5 msg.1-5 &&
 532         verify_parents $c1 $c2
 533 '
 534
 535 test_debug 'git log --graph --decorate --oneline --all'
 536
 537 test_expect_success 'merge c0 with c1 (no-ff)' '
 538         git reset --hard c0 &&
 539         test_tick &&
 540         git merge --no-ff c1 &&
 541         verify_merge file result.1 &&
 542         verify_parents $c0 $c1
 543 '
 544
 545 test_debug 'git log --graph --decorate --oneline --all'
 546
 547 test_expect_success 'merge c0 with c1 (merge.ff=false)' '
 548         git reset --hard c0 &&
 549         test_config merge.ff "false" &&
 550         test_tick &&
 551         git merge c1 &&
 552         verify_merge file result.1 &&
 553         verify_parents $c0 $c1
 554 '
 555 test_debug 'git log --graph --decorate --oneline --all'
 556
 557 test_expect_success 'combine branch.main.mergeoptions with merge.ff' '
 558         git reset --hard c0 &&
 559         test_config branch.main.mergeoptions "--ff" &&
 560         test_config merge.ff "false" &&
 561         test_tick &&
 562         git merge c1 &&
 563         verify_merge file result.1 &&
 564         verify_parents "$c0"
 565 '
 566
 567 test_expect_success 'tolerate unknown values for merge.ff' '
 568         git reset --hard c0 &&
 569         test_config merge.ff "something-new" &&
 570         test_tick &&
 571         git merge c1 2>message &&
 572         verify_head "$c1" &&
 573         test_must_be_empty message
 574 '
 575
 576 test_expect_success 'combining --squash and --no-ff is refused' '
 577         git reset --hard c0 &&
 578         test_must_fail git merge --squash --no-ff c1 &&
 579         test_must_fail git merge --no-ff --squash c1
 580 '
 581
 582 test_expect_success 'combining --squash and --commit is refused' '
 583         git reset --hard c0 &&
 584         test_must_fail git merge --squash --commit c1 &&
 585         test_must_fail git merge --commit --squash c1
 586 '
 587
 588 test_expect_success 'option --ff-only overwrites --no-ff' '
 589         git merge --no-ff --ff-only c1 &&
 590         test_must_fail git merge --no-ff --ff-only c2
 591 '
 592
 593 test_expect_success 'option --no-ff overrides merge.ff=only config' '
 594         git reset --hard c0 &&
 595         test_config merge.ff only &&
 596         git merge --no-ff c1
 597 '
 598
 599 test_expect_success 'merge c0 with c1 (ff overrides no-ff)' '
 600         git reset --hard c0 &&
 601         test_config branch.main.mergeoptions "--no-ff" &&
 602         git merge --ff c1 &&
 603         verify_merge file result.1 &&
 604         verify_head $c1
 605 '
 606
 607 test_expect_success 'merge log message' '
 608         git reset --hard c0 &&
 609         git merge --no-log c2 &&
 610         git show -s --pretty=format:%b HEAD >msg.act &&
 611         test_must_be_empty msg.act &&
 612
 613         git reset --hard c0 &&
 614         test_config branch.main.mergeoptions "--no-ff" &&
 615         git merge --no-log c2 &&
 616         git show -s --pretty=format:%b HEAD >msg.act &&
 617         test_must_be_empty msg.act &&
 618
 619         git merge --log c3 &&
 620         git show -s --pretty=format:%b HEAD >msg.act &&
 621         test_cmp msg.log msg.act &&
 622
 623         git reset --hard HEAD^ &&
 624         test_config merge.log "yes" &&
 625         git merge c3 &&
 626         git show -s --pretty=format:%b HEAD >msg.act &&
 627         test_cmp msg.log msg.act
 628 '
 629
 630 test_debug 'git log --graph --decorate --oneline --all'
 631
 632 test_expect_success 'merge c1 with c0, c2, c0, and c1' '
 633        git reset --hard c1 &&
 634        test_tick &&
 635        git merge c0 c2 c0 c1 &&
 636        verify_merge file result.1-5 &&
 637        verify_parents $c1 $c2
 638 '
 639
 640 test_debug 'git log --graph --decorate --oneline --all'
 641
 642 test_expect_success 'merge c1 with c0, c2, c0, and c1' '
 643        git reset --hard c1 &&
 644        test_tick &&
 645        git merge c0 c2 c0 c1 &&
 646        verify_merge file result.1-5 &&
 647        verify_parents $c1 $c2
 648 '
 649
 650 test_debug 'git log --graph --decorate --oneline --all'
 651
 652 test_expect_success 'merge c1 with c1 and c2' '
 653        git reset --hard c1 &&
 654        test_tick &&
 655        git merge c1 c2 &&
 656        verify_merge file result.1-5 &&
 657        verify_parents $c1 $c2
 658 '
 659
 660 test_debug 'git log --graph --decorate --oneline --all'
 661
 662 test_expect_success 'merge fast-forward in a dirty tree' '
 663        git reset --hard c0 &&
 664        mv file file1 &&
 665        cat file1 >file &&
 666        rm -f file1 &&
 667        git merge c2
 668 '
 669
 670 test_debug 'git log --graph --decorate --oneline --all'
 671
 672 test_expect_success 'in-index merge' '
 673         git reset --hard c0 &&
 674         git merge --no-ff -s resolve c1 >out &&
 675         test_i18ngrep "Wonderful." out &&
 676         verify_parents $c0 $c1
 677 '
 678
 679 test_debug 'git log --graph --decorate --oneline --all'
 680
 681 test_expect_success 'refresh the index before merging' '
 682         git reset --hard c1 &&
 683         cp file file.n && mv -f file.n file &&
 684         git merge c3
 685 '
 686
 687 test_expect_success 'merge with --autostash' '
 688         git reset --hard c1 &&
 689         git merge-file file file.orig file.9 &&
 690         git merge --autostash c2 2>err &&
 691         test_i18ngrep "Applied autostash." err &&
 692         git show HEAD:file >merge-result &&
 693         test_cmp result.1-5 merge-result &&
 694         test_cmp result.1-5-9 file
 695 '
 696
 697 test_expect_success 'merge with merge.autoStash' '
 698         test_config merge.autoStash true &&
 699         git reset --hard c1 &&
 700         git merge-file file file.orig file.9 &&
 701         git merge c2 2>err &&
 702         test_i18ngrep "Applied autostash." err &&
 703         git show HEAD:file >merge-result &&
 704         test_cmp result.1-5 merge-result &&
 705         test_cmp result.1-5-9 file
 706 '
 707
 708 test_expect_success 'fast-forward merge with --autostash' '
 709         git reset --hard c0 &&
 710         git merge-file file file.orig file.5 &&
 711         git merge --autostash c1 2>err &&
 712         test_i18ngrep "Applied autostash." err &&
 713         test_cmp result.1-5 file
 714 '
 715
 716 test_expect_success 'failed fast-forward merge with --autostash' '
 717         git reset --hard c0 &&
 718         git merge-file file file.orig file.5 &&
 719         cp file.5 other &&
 720         test_when_finished "rm other" &&
 721         test_must_fail git merge --autostash c1 2>err &&
 722         test_i18ngrep "Applied autostash." err &&
 723         test_cmp file.5 file
 724 '
 725
 726 test_expect_success 'octopus merge with --autostash' '
 727         git reset --hard c1 &&
 728         git merge-file file file.orig file.3 &&
 729         git merge --autostash c2 c3 2>err &&
 730         test_i18ngrep "Applied autostash." err &&
 731         git show HEAD:file >merge-result &&
 732         test_cmp result.1-5-9 merge-result &&
 733         test_cmp result.1-3-5-9 file
 734 '
 735
 736 test_expect_success 'failed merge (exit 2) with --autostash' '
 737         git reset --hard c1 &&
 738         git merge-file file file.orig file.5 &&
 739         test_must_fail git merge -s recursive --autostash c2 c3 2>err &&
 740         test_i18ngrep "Applied autostash." err &&
 741         test_cmp result.1-5 file
 742 '
 743
 744 test_expect_success 'conflicted merge with --autostash, --abort restores stash' '
 745         git reset --hard c3 &&
 746         cp file.1 file &&
 747         test_must_fail git merge --autostash c7 &&
 748         git merge --abort 2>err &&
 749         test_i18ngrep "Applied autostash." err &&
 750         test_cmp file.1 file
 751 '
 752
 753 test_expect_success 'completed merge (git commit) with --no-commit and --autostash' '
 754         git reset --hard c1 &&
 755         git merge-file file file.orig file.9 &&
 756         git diff >expect &&
 757         git merge --no-commit --autostash c2 &&
 758         git stash show -p MERGE_AUTOSTASH >actual &&
 759         test_cmp expect actual &&
 760         git commit 2>err &&
 761         test_i18ngrep "Applied autostash." err &&
 762         git show HEAD:file >merge-result &&
 763         test_cmp result.1-5 merge-result &&
 764         test_cmp result.1-5-9 file
 765 '
 766
 767 test_expect_success 'completed merge (git merge --continue) with --no-commit and --autostash' '
 768         git reset --hard c1 &&
 769         git merge-file file file.orig file.9 &&
 770         git diff >expect &&
 771         git merge --no-commit --autostash c2 &&
 772         git stash show -p MERGE_AUTOSTASH >actual &&
 773         test_cmp expect actual &&
 774         git merge --continue 2>err &&
 775         test_i18ngrep "Applied autostash." err &&
 776         git show HEAD:file >merge-result &&
 777         test_cmp result.1-5 merge-result &&
 778         test_cmp result.1-5-9 file
 779 '
 780
 781 test_expect_success 'aborted merge (merge --abort) with --no-commit and --autostash' '
 782         git reset --hard c1 &&
 783         git merge-file file file.orig file.9 &&
 784         git diff >expect &&
 785         git merge --no-commit --autostash c2 &&
 786         git stash show -p MERGE_AUTOSTASH >actual &&
 787         test_cmp expect actual &&
 788         git merge --abort 2>err &&
 789         test_i18ngrep "Applied autostash." err &&
 790         git diff >actual &&
 791         test_cmp expect actual
 792 '
 793
 794 test_expect_success 'aborted merge (reset --hard) with --no-commit and --autostash' '
 795         git reset --hard c1 &&
 796         git merge-file file file.orig file.9 &&
 797         git diff >expect &&
 798         git merge --no-commit --autostash c2 &&
 799         git stash show -p MERGE_AUTOSTASH >actual &&
 800         test_cmp expect actual &&
 801         git reset --hard 2>err &&
 802         test_i18ngrep "Autostash exists; creating a new stash entry." err &&
 803         git diff --exit-code
 804 '
 805
 806 test_expect_success 'quit merge with --no-commit and --autostash' '
 807         git reset --hard c1 &&
 808         git merge-file file file.orig file.9 &&
 809         git diff >expect &&
 810         git merge --no-commit --autostash c2 &&
 811         git stash show -p MERGE_AUTOSTASH >actual &&
 812         test_cmp expect actual &&
 813         git diff HEAD >expect &&
 814         git merge --quit 2>err &&
 815         test_i18ngrep "Autostash exists; creating a new stash entry." err &&
 816         git diff HEAD >actual &&
 817         test_cmp expect actual
 818 '
 819
 820 test_expect_success 'merge with conflicted --autostash changes' '
 821         git reset --hard c1 &&
 822         git merge-file file file.orig file.9y &&
 823         git diff >expect &&
 824         test_when_finished "test_might_fail git stash drop" &&
 825         git merge --autostash c3 2>err &&
 826         test_i18ngrep "Applying autostash resulted in conflicts." err &&
 827         git show HEAD:file >merge-result &&
 828         test_cmp result.1-9 merge-result &&
 829         git stash show -p >actual &&
 830         test_cmp expect actual
 831 '
 832
 833 cat >expected.branch <<\EOF
 834 Merge branch 'c5-branch' (early part)
 835 EOF
 836 cat >expected.tag <<\EOF
 837 Merge commit 'c5~1'
 838 EOF
 839
 840 test_expect_success 'merge early part of c2' '
 841         git reset --hard c3 &&
 842         echo c4 >c4.c &&
 843         git add c4.c &&
 844         git commit -m c4 &&
 845         git tag c4 &&
 846         echo c5 >c5.c &&
 847         git add c5.c &&
 848         git commit -m c5 &&
 849         git tag c5 &&
 850         git reset --hard c3 &&
 851         echo c6 >c6.c &&
 852         git add c6.c &&
 853         git commit -m c6 &&
 854         git tag c6 &&
 855         git branch -f c5-branch c5 &&
 856         git merge c5-branch~1 &&
 857         git show -s --pretty=tformat:%s HEAD >actual.branch &&
 858         git reset --keep HEAD^ &&
 859         git merge c5~1 &&
 860         git show -s --pretty=tformat:%s HEAD >actual.tag &&
 861         test_cmp expected.branch actual.branch &&
 862         test_cmp expected.tag actual.tag
 863 '
 864
 865 test_debug 'git log --graph --decorate --oneline --all'
 866
 867 test_expect_success 'merge --no-ff --no-commit && commit' '
 868         git reset --hard c0 &&
 869         git merge --no-ff --no-commit c1 &&
 870         EDITOR=: git commit &&
 871         verify_parents $c0 $c1
 872 '
 873
 874 test_debug 'git log --graph --decorate --oneline --all'
 875
 876 test_expect_success 'amending no-ff merge commit' '
 877         EDITOR=: git commit --amend &&
 878         verify_parents $c0 $c1
 879 '
 880
 881 test_debug 'git log --graph --decorate --oneline --all'
 882
 883 cat >editor <<\EOF
 884 #!/bin/sh
 885 # Add a new message string that was not in the template
 886 (
 887         echo "Merge work done on the side branch c1"
 888         echo
 889         cat "$1"
 890 ) >"$1.tmp" && mv "$1.tmp" "$1"
 891 # strip comments and blank lines from end of message
 892 sed -e '/^#/d' "$1" | sed -e :a -e '/^\n*$/{$d;N;ba' -e '}' >expected
 893 EOF
 894 chmod 755 editor
 895
 896 test_expect_success 'merge --no-ff --edit' '
 897         git reset --hard c0 &&
 898         EDITOR=./editor git merge --no-ff --edit c1 &&
 899         verify_parents $c0 $c1 &&
 900         git cat-file commit HEAD >raw &&
 901         grep "work done on the side branch" raw &&
 902         sed "1,/^$/d" >actual raw &&
 903         test_cmp expected actual
 904 '
 905
 906 test_expect_success 'merge annotated/signed tag w/o tracking' '
 907         test_when_finished "rm -rf dst; git tag -d anno1" &&
 908         git tag -a -m "anno c1" anno1 c1 &&
 909         git init dst &&
 910         git rev-parse c1 >dst/expect &&
 911         (
 912                 # c0 fast-forwards to c1 but because this repository
 913                 # is not a "downstream" whose refs/tags follows along
 914                 # tag from the "upstream", this pull defaults to --no-ff
 915                 cd dst &&
 916                 git pull .. c0 &&
 917                 git pull .. anno1 &&
 918                 git rev-parse HEAD^2 >actual &&
 919                 test_cmp expect actual
 920         )
 921 '
 922
 923 test_expect_success 'merge annotated/signed tag w/ tracking' '
 924         test_when_finished "rm -rf dst; git tag -d anno1" &&
 925         git tag -a -m "anno c1" anno1 c1 &&
 926         git init dst &&
 927         git rev-parse c1 >dst/expect &&
 928         (
 929                 # c0 fast-forwards to c1 and because this repository
 930                 # is a "downstream" whose refs/tags follows along
 931                 # tag from the "upstream", this pull defaults to --ff
 932                 cd dst &&
 933                 git remote add origin .. &&
 934                 git pull origin c0 &&
 935                 git fetch origin &&
 936                 git merge anno1 &&
 937                 git rev-parse HEAD >actual &&
 938                 test_cmp expect actual
 939         )
 940 '
 941
 942 test_expect_success GPG 'merge --ff-only tag' '
 943         git reset --hard c0 &&
 944         git commit --allow-empty -m "A newer commit" &&
 945         git tag -s -m "A newer commit" signed &&
 946         git reset --hard c0 &&
 947
 948         git merge --ff-only signed &&
 949         git rev-parse signed^0 >expect &&
 950         git rev-parse HEAD >actual &&
 951         test_cmp expect actual
 952 '
 953
 954 test_expect_success GPG 'merge --no-edit tag should skip editor' '
 955         git reset --hard c0 &&
 956         git commit --allow-empty -m "A newer commit" &&
 957         git tag -f -s -m "A newer commit" signed &&
 958         git reset --hard c0 &&
 959
 960         EDITOR=false git merge --no-edit --no-ff signed &&
 961         git rev-parse signed^0 >expect &&
 962         git rev-parse HEAD^2 >actual &&
 963         test_cmp expect actual
 964 '
 965
 966 test_expect_success 'set up mod-256 conflict scenario' '
 967         # 256 near-identical stanzas...
 968         for i in $(test_seq 1 256); do
 969                 for j in 1 2 3 4 5; do
 970                         echo $i-$j || return 1
 971                 done
 972         done >file &&
 973         git add file &&
 974         git commit -m base &&
 975
 976         # one side changes the first line of each to "main"
 977         sed s/-1/-main/ file >tmp &&
 978         mv tmp file &&
 979         git commit -am main &&
 980
 981         # and the other to "side"; merging the two will
 982         # yield 256 separate conflicts
 983         git checkout -b side HEAD^ &&
 984         sed s/-1/-side/ file >tmp &&
 985         mv tmp file &&
 986         git commit -am side
 987 '
 988
 989 test_expect_success 'merge detects mod-256 conflicts (recursive)' '
 990         git reset --hard &&
 991         test_must_fail git merge -s recursive main
 992 '
 993
 994 test_expect_success 'merge detects mod-256 conflicts (resolve)' '
 995         git reset --hard &&
 996         test_must_fail git merge -s resolve main
 997 '
 998
 999 test_expect_success 'merge nothing into void' '
1000         git init void &&
1001         (
1002                 cd void &&
1003                 git remote add up .. &&
1004                 git fetch up &&
1005                 test_must_fail git merge FETCH_HEAD
1006         )
1007 '
1008
1009 test_expect_success 'merge can be completed with --continue' '
1010         git reset --hard c0 &&
1011         git merge --no-ff --no-commit c1 &&
1012         git merge --continue &&
1013         verify_parents $c0 $c1
1014 '
1015
1016 write_script .git/FAKE_EDITOR <<EOF
1017 # kill -TERM command added below.
1018 EOF
1019
1020 test_expect_success EXECKEEPSPID 'killed merge can be completed with --continue' '
1021         git reset --hard c0 &&
1022         ! "$SHELL_PATH" -c '\''
1023           echo kill -TERM $$ >>.git/FAKE_EDITOR
1024           GIT_EDITOR=.git/FAKE_EDITOR
1025           export GIT_EDITOR
1026           exec git merge --no-ff --edit c1'\'' &&
1027         git merge --continue &&
1028         verify_parents $c0 $c1
1029 '
1030
1031 test_expect_success 'merge --quit' '
1032         git init merge-quit &&
1033         (
1034                 cd merge-quit &&
1035                 test_commit base &&
1036                 echo one >>base.t &&
1037                 git commit -am one &&
1038                 git branch one &&
1039                 git checkout base &&
1040                 echo two >>base.t &&
1041                 git commit -am two &&
1042                 test_must_fail git -c rerere.enabled=true merge one &&
1043                 test_path_is_file .git/MERGE_HEAD &&
1044                 test_path_is_file .git/MERGE_MODE &&
1045                 test_path_is_file .git/MERGE_MSG &&
1046                 git rerere status >rerere.before &&
1047                 git merge --quit &&
1048                 test_path_is_missing .git/MERGE_HEAD &&
1049                 test_path_is_missing .git/MERGE_MODE &&
1050                 test_path_is_missing .git/MERGE_MSG &&
1051                 git rerere status >rerere.after &&
1052                 test_must_be_empty rerere.after &&
1053                 ! test_cmp rerere.after rerere.before
1054         )
1055 '
1056
1057 test_expect_success 'merge suggests matching remote refname' '
1058         git commit --allow-empty -m not-local &&
1059         git update-ref refs/remotes/origin/not-local HEAD &&
1060         git reset --hard HEAD^ &&
1061
1062         # This is white-box testing hackery; we happen to know
1063         # that reading packed refs is more picky about the memory
1064         # ownership of strings we pass to for_each_ref() callbacks.
1065         git pack-refs --all --prune &&
1066
1067         test_must_fail git merge not-local 2>stderr &&
1068         grep origin/not-local stderr
1069 '
1070
1071 test_expect_success 'suggested names are not ambiguous' '
1072         git update-ref refs/heads/origin/not-local HEAD &&
1073         test_must_fail git merge not-local 2>stderr &&
1074         grep remotes/origin/not-local stderr
1075 '
1076
1077 test_done