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        * [master] Merge commit 'c1'
  18 --------
  19        - [master] 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 . ./test-lib.sh
  30 . "$TEST_DIRECTORY"/lib-gpg.sh
  31
  32 printf '%s\n' 1 2 3 4 5 6 7 8 9 >file
  33 printf '%s\n' '1 X' 2 3 4 5 6 7 8 9 >file.1
  34 printf '%s\n' 1 2 3 4 '5 X' 6 7 8 9 >file.5
  35 printf '%s\n' 1 2 3 4 5 6 7 8 '9 X' >file.9
  36 printf '%s\n' 1 2 3 4 5 6 7 8 '9 Y' >file.9y
  37 printf '%s\n' '1 X' 2 3 4 5 6 7 8 9 >result.1
  38 printf '%s\n' '1 X' 2 3 4 '5 X' 6 7 8 9 >result.1-5
  39 printf '%s\n' '1 X' 2 3 4 '5 X' 6 7 8 '9 X' >result.1-5-9
  40 printf '%s\n' 1 2 3 4 5 6 7 8 '9 Z' >result.9z
  41
  42 create_merge_msgs () {
  43         echo "Merge tag 'c2'" >msg.1-5 &&
  44         echo "Merge tags 'c2' and 'c3'" >msg.1-5-9 &&
  45         {
  46                 echo "Squashed commit of the following:" &&
  47                 echo &&
  48                 git log --no-merges ^HEAD c1
  49         } >squash.1 &&
  50         {
  51                 echo "Squashed commit of the following:" &&
  52                 echo &&
  53                 git log --no-merges ^HEAD c2
  54         } >squash.1-5 &&
  55         {
  56                 echo "Squashed commit of the following:" &&
  57                 echo &&
  58                 git log --no-merges ^HEAD c2 c3
  59         } >squash.1-5-9 &&
  60         {
  61                 echo "* tag 'c3':" &&
  62                 echo "  commit 3"
  63         } >msg.log
  64 }
  65
  66 verify_merge () {
  67         test_cmp "$2" "$1" &&
  68         git update-index --refresh &&
  69         git diff --exit-code &&
  70         if test -n "$3"
  71         then
  72                 git show -s --pretty=tformat:%s HEAD >msg.act &&
  73                 test_cmp "$3" msg.act
  74         fi
  75 }
  76
  77 verify_head () {
  78         echo "$1" >head.expected &&
  79         git rev-parse HEAD >head.actual &&
  80         test_cmp head.expected head.actual
  81 }
  82
  83 verify_parents () {
  84         printf '%s\n' "$@" >parents.expected &&
  85         >parents.actual &&
  86         i=1 &&
  87         while test $i -le $#
  88         do
  89                 git rev-parse HEAD^$i >>parents.actual &&
  90                 i=$(expr $i + 1) ||
  91                 return 1
  92         done &&
  93         test_must_fail git rev-parse --verify "HEAD^$i" &&
  94         test_cmp parents.expected parents.actual
  95 }
  96
  97 verify_mergeheads () {
  98         printf '%s\n' "$@" >mergehead.expected &&
  99         while read sha1 rest
 100         do
 101                 git rev-parse $sha1
 102         done <.git/MERGE_HEAD >mergehead.actual &&
 103         test_cmp mergehead.expected mergehead.actual
 104 }
 105
 106 verify_no_mergehead () {
 107         ! test -e .git/MERGE_HEAD
 108 }
 109
 110 test_expect_success 'setup' '
 111         git add file &&
 112         test_tick &&
 113         git commit -m "commit 0" &&
 114         git tag c0 &&
 115         c0=$(git rev-parse HEAD) &&
 116         cp file.1 file &&
 117         git add file &&
 118         test_tick &&
 119         git commit -m "commit 1" &&
 120         git tag c1 &&
 121         c1=$(git rev-parse HEAD) &&
 122         git reset --hard "$c0" &&
 123         cp file.5 file &&
 124         git add file &&
 125         test_tick &&
 126         git commit -m "commit 2" &&
 127         git tag c2 &&
 128         c2=$(git rev-parse HEAD) &&
 129         git reset --hard "$c0" &&
 130         cp file.9y file &&
 131         git add file &&
 132         test_tick &&
 133         git commit -m "commit 7" &&
 134         git tag c7 &&
 135         git reset --hard "$c0" &&
 136         cp file.9 file &&
 137         git add file &&
 138         test_tick &&
 139         git commit -m "commit 3" &&
 140         git tag c3 &&
 141         c3=$(git rev-parse HEAD) &&
 142         git reset --hard "$c0" &&
 143         create_merge_msgs
 144 '
 145
 146 test_debug 'git log --graph --decorate --oneline --all'
 147
 148 test_expect_success 'test option parsing' '
 149         test_must_fail git merge -$ c1 &&
 150         test_must_fail git merge --no-such c1 &&
 151         test_must_fail git merge -s foobar c1 &&
 152         test_must_fail git merge -s=foobar c1 &&
 153         test_must_fail git merge -m &&
 154         test_must_fail git merge --abort foobar &&
 155         test_must_fail git merge --abort --quiet &&
 156         test_must_fail git merge --continue foobar &&
 157         test_must_fail git merge --continue --quiet &&
 158         test_must_fail git merge
 159 '
 160
 161 test_expect_success 'merge -h with invalid index' '
 162         mkdir broken &&
 163         (
 164                 cd broken &&
 165                 git init &&
 166                 >.git/index &&
 167                 test_expect_code 129 git merge -h 2>usage
 168         ) &&
 169         test_i18ngrep "[Uu]sage: git merge" broken/usage
 170 '
 171
 172 test_expect_success 'reject non-strategy with a git-merge-foo name' '
 173         test_must_fail git merge -s index c1
 174 '
 175
 176 test_expect_success 'merge c0 with c1' '
 177         echo "OBJID HEAD@{0}: merge c1: Fast-forward" >reflog.expected &&
 178
 179         git reset --hard c0 &&
 180         git merge c1 &&
 181         verify_merge file result.1 &&
 182         verify_head "$c1" &&
 183
 184         git reflog -1 >reflog.actual &&
 185         sed "s/$_x05[0-9a-f]*/OBJID/g" reflog.actual >reflog.fuzzy &&
 186         test_cmp reflog.expected reflog.fuzzy
 187 '
 188
 189 test_debug 'git log --graph --decorate --oneline --all'
 190
 191 test_expect_success 'merge c0 with c1 with --ff-only' '
 192         git reset --hard c0 &&
 193         git merge --ff-only c1 &&
 194         git merge --ff-only HEAD c0 c1 &&
 195         verify_merge file result.1 &&
 196         verify_head "$c1"
 197 '
 198
 199 test_debug 'git log --graph --decorate --oneline --all'
 200
 201 test_expect_success 'merge from unborn branch' '
 202         git checkout -f master &&
 203         test_might_fail git branch -D kid &&
 204
 205         echo "OBJID HEAD@{0}: initial pull" >reflog.expected &&
 206
 207         git checkout --orphan kid &&
 208         test_when_finished "git checkout -f master" &&
 209         git rm -fr . &&
 210         test_tick &&
 211         git merge --ff-only c1 &&
 212         verify_merge file result.1 &&
 213         verify_head "$c1" &&
 214
 215         git reflog -1 >reflog.actual &&
 216         sed "s/$_x05[0-9a-f][0-9a-f]/OBJID/g" reflog.actual >reflog.fuzzy &&
 217         test_cmp reflog.expected reflog.fuzzy
 218 '
 219
 220 test_debug 'git log --graph --decorate --oneline --all'
 221
 222 test_expect_success 'merge c1 with c2' '
 223         git reset --hard c1 &&
 224         test_tick &&
 225         git merge c2 &&
 226         verify_merge file result.1-5 msg.1-5 &&
 227         verify_parents $c1 $c2
 228 '
 229
 230 test_expect_success 'merge --squash c3 with c7' '
 231         git reset --hard c3 &&
 232         test_must_fail git merge --squash c7 &&
 233         cat result.9z >file &&
 234         git commit --no-edit -a &&
 235
 236         cat >expect <<-EOF &&
 237         Squashed commit of the following:
 238
 239         $(git show -s c7)
 240
 241         # Conflicts:
 242         #       file
 243         EOF
 244         git cat-file commit HEAD >raw &&
 245         sed -e '1,/^$/d' raw >actual &&
 246         test_cmp expect actual
 247 '
 248
 249 test_expect_success 'merge c3 with c7 with commit.cleanup = scissors' '
 250         git config commit.cleanup scissors &&
 251         git reset --hard c3 &&
 252         test_must_fail git merge c7 &&
 253         cat result.9z >file &&
 254         git commit --no-edit -a &&
 255
 256         cat >expect <<-\EOF &&
 257         Merge tag '"'"'c7'"'"'
 258
 259         # ------------------------ >8 ------------------------
 260         # Do not modify or remove the line above.
 261         # Everything below it will be ignored.
 262         #
 263         # Conflicts:
 264         #       file
 265         EOF
 266         git cat-file commit HEAD >raw &&
 267         sed -e '1,/^$/d' raw >actual &&
 268         test_i18ncmp expect actual
 269 '
 270
 271 test_expect_success 'merge c3 with c7 with --squash commit.cleanup = scissors' '
 272         git config commit.cleanup scissors &&
 273         git reset --hard c3 &&
 274         test_must_fail git merge --squash c7 &&
 275         cat result.9z >file &&
 276         git commit --no-edit -a &&
 277
 278         cat >expect <<-EOF &&
 279         Squashed commit of the following:
 280
 281         $(git show -s c7)
 282
 283         # ------------------------ >8 ------------------------
 284         # Do not modify or remove the line above.
 285         # Everything below it will be ignored.
 286         #
 287         # Conflicts:
 288         #       file
 289         EOF
 290         git cat-file commit HEAD >raw &&
 291         sed -e '1,/^$/d' raw >actual &&
 292         test_i18ncmp expect actual
 293 '
 294
 295 test_debug 'git log --graph --decorate --oneline --all'
 296
 297 test_expect_success 'merge c1 with c2 and c3' '
 298         git reset --hard c1 &&
 299         test_tick &&
 300         git merge c2 c3 &&
 301         verify_merge file result.1-5-9 msg.1-5-9 &&
 302         verify_parents $c1 $c2 $c3
 303 '
 304
 305 test_debug 'git log --graph --decorate --oneline --all'
 306
 307 test_expect_success 'merges with --ff-only' '
 308         git reset --hard c1 &&
 309         test_tick &&
 310         test_must_fail git merge --ff-only c2 &&
 311         test_must_fail git merge --ff-only c3 &&
 312         test_must_fail git merge --ff-only c2 c3 &&
 313         git reset --hard c0 &&
 314         git merge c3 &&
 315         verify_head $c3
 316 '
 317
 318 test_expect_success 'merges with merge.ff=only' '
 319         git reset --hard c1 &&
 320         test_tick &&
 321         test_config merge.ff "only" &&
 322         test_must_fail git merge c2 &&
 323         test_must_fail git merge c3 &&
 324         test_must_fail git merge c2 c3 &&
 325         git reset --hard c0 &&
 326         git merge c3 &&
 327         verify_head $c3
 328 '
 329
 330 test_expect_success 'merge c0 with c1 (no-commit)' '
 331         git reset --hard c0 &&
 332         git merge --no-commit c1 &&
 333         verify_merge file result.1 &&
 334         verify_head $c1
 335 '
 336
 337 test_debug 'git log --graph --decorate --oneline --all'
 338
 339 test_expect_success 'merge c1 with c2 (no-commit)' '
 340         git reset --hard c1 &&
 341         git merge --no-commit c2 &&
 342         verify_merge file result.1-5 &&
 343         verify_head $c1 &&
 344         verify_mergeheads $c2
 345 '
 346
 347 test_debug 'git log --graph --decorate --oneline --all'
 348
 349 test_expect_success 'merge c1 with c2 and c3 (no-commit)' '
 350         git reset --hard c1 &&
 351         git merge --no-commit c2 c3 &&
 352         verify_merge file result.1-5-9 &&
 353         verify_head $c1 &&
 354         verify_mergeheads $c2 $c3
 355 '
 356
 357 test_debug 'git log --graph --decorate --oneline --all'
 358
 359 test_expect_success 'merge c0 with c1 (squash)' '
 360         git reset --hard c0 &&
 361         git merge --squash c1 &&
 362         verify_merge file result.1 &&
 363         verify_head $c0 &&
 364         verify_no_mergehead &&
 365         test_cmp squash.1 .git/SQUASH_MSG
 366 '
 367
 368 test_debug 'git log --graph --decorate --oneline --all'
 369
 370 test_expect_success 'merge c0 with c1 (squash, ff-only)' '
 371         git reset --hard c0 &&
 372         git merge --squash --ff-only c1 &&
 373         verify_merge file result.1 &&
 374         verify_head $c0 &&
 375         verify_no_mergehead &&
 376         test_cmp squash.1 .git/SQUASH_MSG
 377 '
 378
 379 test_debug 'git log --graph --decorate --oneline --all'
 380
 381 test_expect_success 'merge c1 with c2 (squash)' '
 382         git reset --hard c1 &&
 383         git merge --squash c2 &&
 384         verify_merge file result.1-5 &&
 385         verify_head $c1 &&
 386         verify_no_mergehead &&
 387         test_cmp squash.1-5 .git/SQUASH_MSG
 388 '
 389
 390 test_debug 'git log --graph --decorate --oneline --all'
 391
 392 test_expect_success 'unsuccessful merge of c1 with c2 (squash, ff-only)' '
 393         git reset --hard c1 &&
 394         test_must_fail git merge --squash --ff-only c2
 395 '
 396
 397 test_debug 'git log --graph --decorate --oneline --all'
 398
 399 test_expect_success 'merge c1 with c2 and c3 (squash)' '
 400         git reset --hard c1 &&
 401         git merge --squash c2 c3 &&
 402         verify_merge file result.1-5-9 &&
 403         verify_head $c1 &&
 404         verify_no_mergehead &&
 405         test_cmp squash.1-5-9 .git/SQUASH_MSG
 406 '
 407
 408 test_debug 'git log --graph --decorate --oneline --all'
 409
 410 test_expect_success 'merge c1 with c2 (no-commit in config)' '
 411         git reset --hard c1 &&
 412         test_config branch.master.mergeoptions "--no-commit" &&
 413         git merge c2 &&
 414         verify_merge file result.1-5 &&
 415         verify_head $c1 &&
 416         verify_mergeheads $c2
 417 '
 418
 419 test_debug 'git log --graph --decorate --oneline --all'
 420
 421 test_expect_success 'merge c1 with c2 (log in config)' '
 422         git reset --hard c1 &&
 423         git merge --log c2 &&
 424         git show -s --pretty=tformat:%s%n%b >expect &&
 425
 426         test_config branch.master.mergeoptions "--log" &&
 427         git reset --hard c1 &&
 428         git merge c2 &&
 429         git show -s --pretty=tformat:%s%n%b >actual &&
 430
 431         test_cmp expect actual
 432 '
 433
 434 test_expect_success 'merge c1 with c2 (log in config gets overridden)' '
 435         git reset --hard c1 &&
 436         git merge c2 &&
 437         git show -s --pretty=tformat:%s%n%b >expect &&
 438
 439         test_config branch.master.mergeoptions "--no-log" &&
 440         test_config merge.log "true" &&
 441         git reset --hard c1 &&
 442         git merge c2 &&
 443         git show -s --pretty=tformat:%s%n%b >actual &&
 444
 445         test_cmp expect actual
 446 '
 447
 448 test_expect_success 'merge c1 with c2 (squash in config)' '
 449         git reset --hard c1 &&
 450         test_config branch.master.mergeoptions "--squash" &&
 451         git merge c2 &&
 452         verify_merge file result.1-5 &&
 453         verify_head $c1 &&
 454         verify_no_mergehead &&
 455         test_cmp squash.1-5 .git/SQUASH_MSG
 456 '
 457
 458 test_debug 'git log --graph --decorate --oneline --all'
 459
 460 test_expect_success 'override config option -n with --summary' '
 461         git reset --hard c1 &&
 462         test_config branch.master.mergeoptions "-n" &&
 463         test_tick &&
 464         git merge --summary c2 >diffstat.txt &&
 465         verify_merge file result.1-5 msg.1-5 &&
 466         verify_parents $c1 $c2 &&
 467         if ! grep "^ file |  *2 +-$" diffstat.txt
 468         then
 469                 echo "[OOPS] diffstat was not generated with --summary"
 470                 false
 471         fi
 472 '
 473
 474 test_expect_success 'override config option -n with --stat' '
 475         git reset --hard c1 &&
 476         test_config branch.master.mergeoptions "-n" &&
 477         test_tick &&
 478         git merge --stat c2 >diffstat.txt &&
 479         verify_merge file result.1-5 msg.1-5 &&
 480         verify_parents $c1 $c2 &&
 481         if ! grep "^ file |  *2 +-$" diffstat.txt
 482         then
 483                 echo "[OOPS] diffstat was not generated with --stat"
 484                 false
 485         fi
 486 '
 487
 488 test_debug 'git log --graph --decorate --oneline --all'
 489
 490 test_expect_success 'override config option --stat' '
 491         git reset --hard c1 &&
 492         test_config branch.master.mergeoptions "--stat" &&
 493         test_tick &&
 494         git merge -n c2 >diffstat.txt &&
 495         verify_merge file result.1-5 msg.1-5 &&
 496         verify_parents $c1 $c2 &&
 497         if grep "^ file |  *2 +-$" diffstat.txt
 498         then
 499                 echo "[OOPS] diffstat was generated"
 500                 false
 501         fi
 502 '
 503
 504 test_debug 'git log --graph --decorate --oneline --all'
 505
 506 test_expect_success 'merge c1 with c2 (override --no-commit)' '
 507         git reset --hard c1 &&
 508         test_config branch.master.mergeoptions "--no-commit" &&
 509         test_tick &&
 510         git merge --commit c2 &&
 511         verify_merge file result.1-5 msg.1-5 &&
 512         verify_parents $c1 $c2
 513 '
 514
 515 test_debug 'git log --graph --decorate --oneline --all'
 516
 517 test_expect_success 'merge c1 with c2 (override --squash)' '
 518         git reset --hard c1 &&
 519         test_config branch.master.mergeoptions "--squash" &&
 520         test_tick &&
 521         git merge --no-squash c2 &&
 522         verify_merge file result.1-5 msg.1-5 &&
 523         verify_parents $c1 $c2
 524 '
 525
 526 test_debug 'git log --graph --decorate --oneline --all'
 527
 528 test_expect_success 'merge c0 with c1 (no-ff)' '
 529         git reset --hard c0 &&
 530         test_tick &&
 531         git merge --no-ff c1 &&
 532         verify_merge file result.1 &&
 533         verify_parents $c0 $c1
 534 '
 535
 536 test_debug 'git log --graph --decorate --oneline --all'
 537
 538 test_expect_success 'merge c0 with c1 (merge.ff=false)' '
 539         git reset --hard c0 &&
 540         test_config merge.ff "false" &&
 541         test_tick &&
 542         git merge c1 &&
 543         verify_merge file result.1 &&
 544         verify_parents $c0 $c1
 545 '
 546 test_debug 'git log --graph --decorate --oneline --all'
 547
 548 test_expect_success 'combine branch.master.mergeoptions with merge.ff' '
 549         git reset --hard c0 &&
 550         test_config branch.master.mergeoptions "--ff" &&
 551         test_config merge.ff "false" &&
 552         test_tick &&
 553         git merge c1 &&
 554         verify_merge file result.1 &&
 555         verify_parents "$c0"
 556 '
 557
 558 test_expect_success 'tolerate unknown values for merge.ff' '
 559         git reset --hard c0 &&
 560         test_config merge.ff "something-new" &&
 561         test_tick &&
 562         git merge c1 2>message &&
 563         verify_head "$c1" &&
 564         test_must_be_empty message
 565 '
 566
 567 test_expect_success 'combining --squash and --no-ff is refused' '
 568         git reset --hard c0 &&
 569         test_must_fail git merge --squash --no-ff c1 &&
 570         test_must_fail git merge --no-ff --squash c1
 571 '
 572
 573 test_expect_success 'option --ff-only overwrites --no-ff' '
 574         git merge --no-ff --ff-only c1 &&
 575         test_must_fail git merge --no-ff --ff-only c2
 576 '
 577
 578 test_expect_success 'option --no-ff overrides merge.ff=only config' '
 579         git reset --hard c0 &&
 580         test_config merge.ff only &&
 581         git merge --no-ff c1
 582 '
 583
 584 test_expect_success 'merge c0 with c1 (ff overrides no-ff)' '
 585         git reset --hard c0 &&
 586         test_config branch.master.mergeoptions "--no-ff" &&
 587         git merge --ff c1 &&
 588         verify_merge file result.1 &&
 589         verify_head $c1
 590 '
 591
 592 test_expect_success 'merge log message' '
 593         git reset --hard c0 &&
 594         git merge --no-log c2 &&
 595         git show -s --pretty=format:%b HEAD >msg.act &&
 596         test_must_be_empty msg.act &&
 597
 598         git reset --hard c0 &&
 599         test_config branch.master.mergeoptions "--no-ff" &&
 600         git merge --no-log c2 &&
 601         git show -s --pretty=format:%b HEAD >msg.act &&
 602         test_must_be_empty msg.act &&
 603
 604         git merge --log c3 &&
 605         git show -s --pretty=format:%b HEAD >msg.act &&
 606         test_cmp msg.log msg.act &&
 607
 608         git reset --hard HEAD^ &&
 609         test_config merge.log "yes" &&
 610         git merge c3 &&
 611         git show -s --pretty=format:%b HEAD >msg.act &&
 612         test_cmp msg.log msg.act
 613 '
 614
 615 test_debug 'git log --graph --decorate --oneline --all'
 616
 617 test_expect_success 'merge c1 with c0, c2, c0, and c1' '
 618        git reset --hard c1 &&
 619        test_tick &&
 620        git merge c0 c2 c0 c1 &&
 621        verify_merge file result.1-5 &&
 622        verify_parents $c1 $c2
 623 '
 624
 625 test_debug 'git log --graph --decorate --oneline --all'
 626
 627 test_expect_success 'merge c1 with c0, c2, c0, and c1' '
 628        git reset --hard c1 &&
 629        test_tick &&
 630        git merge c0 c2 c0 c1 &&
 631        verify_merge file result.1-5 &&
 632        verify_parents $c1 $c2
 633 '
 634
 635 test_debug 'git log --graph --decorate --oneline --all'
 636
 637 test_expect_success 'merge c1 with c1 and c2' '
 638        git reset --hard c1 &&
 639        test_tick &&
 640        git merge c1 c2 &&
 641        verify_merge file result.1-5 &&
 642        verify_parents $c1 $c2
 643 '
 644
 645 test_debug 'git log --graph --decorate --oneline --all'
 646
 647 test_expect_success 'merge fast-forward in a dirty tree' '
 648        git reset --hard c0 &&
 649        mv file file1 &&
 650        cat file1 >file &&
 651        rm -f file1 &&
 652        git merge c2
 653 '
 654
 655 test_debug 'git log --graph --decorate --oneline --all'
 656
 657 test_expect_success 'in-index merge' '
 658         git reset --hard c0 &&
 659         git merge --no-ff -s resolve c1 >out &&
 660         test_i18ngrep "Wonderful." out &&
 661         verify_parents $c0 $c1
 662 '
 663
 664 test_debug 'git log --graph --decorate --oneline --all'
 665
 666 test_expect_success 'refresh the index before merging' '
 667         git reset --hard c1 &&
 668         cp file file.n && mv -f file.n file &&
 669         git merge c3
 670 '
 671
 672 cat >expected.branch <<\EOF
 673 Merge branch 'c5-branch' (early part)
 674 EOF
 675 cat >expected.tag <<\EOF
 676 Merge commit 'c5~1'
 677 EOF
 678
 679 test_expect_success 'merge early part of c2' '
 680         git reset --hard c3 &&
 681         echo c4 >c4.c &&
 682         git add c4.c &&
 683         git commit -m c4 &&
 684         git tag c4 &&
 685         echo c5 >c5.c &&
 686         git add c5.c &&
 687         git commit -m c5 &&
 688         git tag c5 &&
 689         git reset --hard c3 &&
 690         echo c6 >c6.c &&
 691         git add c6.c &&
 692         git commit -m c6 &&
 693         git tag c6 &&
 694         git branch -f c5-branch c5 &&
 695         git merge c5-branch~1 &&
 696         git show -s --pretty=tformat:%s HEAD >actual.branch &&
 697         git reset --keep HEAD^ &&
 698         git merge c5~1 &&
 699         git show -s --pretty=tformat:%s HEAD >actual.tag &&
 700         test_cmp expected.branch actual.branch &&
 701         test_cmp expected.tag actual.tag
 702 '
 703
 704 test_debug 'git log --graph --decorate --oneline --all'
 705
 706 test_expect_success 'merge --no-ff --no-commit && commit' '
 707         git reset --hard c0 &&
 708         git merge --no-ff --no-commit c1 &&
 709         EDITOR=: git commit &&
 710         verify_parents $c0 $c1
 711 '
 712
 713 test_debug 'git log --graph --decorate --oneline --all'
 714
 715 test_expect_success 'amending no-ff merge commit' '
 716         EDITOR=: git commit --amend &&
 717         verify_parents $c0 $c1
 718 '
 719
 720 test_debug 'git log --graph --decorate --oneline --all'
 721
 722 cat >editor <<\EOF
 723 #!/bin/sh
 724 # Add a new message string that was not in the template
 725 (
 726         echo "Merge work done on the side branch c1"
 727         echo
 728         cat "$1"
 729 ) >"$1.tmp" && mv "$1.tmp" "$1"
 730 # strip comments and blank lines from end of message
 731 sed -e '/^#/d' "$1" | sed -e :a -e '/^\n*$/{$d;N;ba' -e '}' >expected
 732 EOF
 733 chmod 755 editor
 734
 735 test_expect_success 'merge --no-ff --edit' '
 736         git reset --hard c0 &&
 737         EDITOR=./editor git merge --no-ff --edit c1 &&
 738         verify_parents $c0 $c1 &&
 739         git cat-file commit HEAD >raw &&
 740         grep "work done on the side branch" raw &&
 741         sed "1,/^$/d" >actual raw &&
 742         test_cmp expected actual
 743 '
 744
 745 test_expect_success 'merge annotated/signed tag w/o tracking' '
 746         test_when_finished "rm -rf dst; git tag -d anno1" &&
 747         git tag -a -m "anno c1" anno1 c1 &&
 748         git init dst &&
 749         git rev-parse c1 >dst/expect &&
 750         (
 751                 # c0 fast-forwards to c1 but because this repository
 752                 # is not a "downstream" whose refs/tags follows along
 753                 # tag from the "upstream", this pull defaults to --no-ff
 754                 cd dst &&
 755                 git pull .. c0 &&
 756                 git pull .. anno1 &&
 757                 git rev-parse HEAD^2 >actual &&
 758                 test_cmp expect actual
 759         )
 760 '
 761
 762 test_expect_success 'merge annotated/signed tag w/ tracking' '
 763         test_when_finished "rm -rf dst; git tag -d anno1" &&
 764         git tag -a -m "anno c1" anno1 c1 &&
 765         git init dst &&
 766         git rev-parse c1 >dst/expect &&
 767         (
 768                 # c0 fast-forwards to c1 and because this repository
 769                 # is a "downstream" whose refs/tags follows along
 770                 # tag from the "upstream", this pull defaults to --ff
 771                 cd dst &&
 772                 git remote add origin .. &&
 773                 git pull origin c0 &&
 774                 git fetch origin &&
 775                 git merge anno1 &&
 776                 git rev-parse HEAD >actual &&
 777                 test_cmp expect actual
 778         )
 779 '
 780
 781 test_expect_success GPG 'merge --ff-only tag' '
 782         git reset --hard c0 &&
 783         git commit --allow-empty -m "A newer commit" &&
 784         git tag -s -m "A newer commit" signed &&
 785         git reset --hard c0 &&
 786
 787         git merge --ff-only signed &&
 788         git rev-parse signed^0 >expect &&
 789         git rev-parse HEAD >actual &&
 790         test_cmp expect actual
 791 '
 792
 793 test_expect_success GPG 'merge --no-edit tag should skip editor' '
 794         git reset --hard c0 &&
 795         git commit --allow-empty -m "A newer commit" &&
 796         git tag -f -s -m "A newer commit" signed &&
 797         git reset --hard c0 &&
 798
 799         EDITOR=false git merge --no-edit --no-ff signed &&
 800         git rev-parse signed^0 >expect &&
 801         git rev-parse HEAD^2 >actual &&
 802         test_cmp expect actual
 803 '
 804
 805 test_expect_success 'set up mod-256 conflict scenario' '
 806         # 256 near-identical stanzas...
 807         for i in $(test_seq 1 256); do
 808                 for j in 1 2 3 4 5; do
 809                         echo $i-$j
 810                 done
 811         done >file &&
 812         git add file &&
 813         git commit -m base &&
 814
 815         # one side changes the first line of each to "master"
 816         sed s/-1/-master/ file >tmp &&
 817         mv tmp file &&
 818         git commit -am master &&
 819
 820         # and the other to "side"; merging the two will
 821         # yield 256 separate conflicts
 822         git checkout -b side HEAD^ &&
 823         sed s/-1/-side/ file >tmp &&
 824         mv tmp file &&
 825         git commit -am side
 826 '
 827
 828 test_expect_success 'merge detects mod-256 conflicts (recursive)' '
 829         git reset --hard &&
 830         test_must_fail git merge -s recursive master
 831 '
 832
 833 test_expect_success 'merge detects mod-256 conflicts (resolve)' '
 834         git reset --hard &&
 835         test_must_fail git merge -s resolve master
 836 '
 837
 838 test_expect_success 'merge nothing into void' '
 839         git init void &&
 840         (
 841                 cd void &&
 842                 git remote add up .. &&
 843                 git fetch up &&
 844                 test_must_fail git merge FETCH_HEAD
 845         )
 846 '
 847
 848 test_expect_success 'merge can be completed with --continue' '
 849         git reset --hard c0 &&
 850         git merge --no-ff --no-commit c1 &&
 851         git merge --continue &&
 852         verify_parents $c0 $c1
 853 '
 854
 855 write_script .git/FAKE_EDITOR <<EOF
 856 # kill -TERM command added below.
 857 EOF
 858
 859 test_expect_success EXECKEEPSPID 'killed merge can be completed with --continue' '
 860         git reset --hard c0 &&
 861         ! "$SHELL_PATH" -c '\''
 862           echo kill -TERM $$ >>.git/FAKE_EDITOR
 863           GIT_EDITOR=.git/FAKE_EDITOR
 864           export GIT_EDITOR
 865           exec git merge --no-ff --edit c1'\'' &&
 866         git merge --continue &&
 867         verify_parents $c0 $c1
 868 '
 869
 870 test_done