t/t3430-rebase-merges.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2018 Johannes E. Schindelin
   4 #
   5
   6 test_description='git rebase -i --rebase-merges
   7
   8 This test runs git rebase "interactively", retaining the branch structure by
   9 recreating merge commits.
  10
  11 Initial setup:
  12
  13     -- B --                   (first)
  14    /       \
  15  A - C - D - E - H            (main)
  16    \    \       /
  17     \    F - G                (second)
  18      \
  19       Conflicting-G
  20 '
  21 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  22 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  23
  24 . ./test-lib.sh
  25 . "$TEST_DIRECTORY"/lib-rebase.sh
  26 . "$TEST_DIRECTORY"/lib-log-graph.sh
  27
  28 test_cmp_graph () {
  29         cat >expect &&
  30         lib_test_cmp_graph --boundary --format=%s "$@"
  31 }
  32
  33 test_expect_success 'setup' '
  34         write_script replace-editor.sh <<-\EOF &&
  35         mv "$1" "$(git rev-parse --git-path ORIGINAL-TODO)"
  36         cp script-from-scratch "$1"
  37         EOF
  38
  39         test_commit A &&
  40         git checkout -b first &&
  41         test_commit B &&
  42         b=$(git rev-parse --short HEAD) &&
  43         git checkout main &&
  44         test_commit C &&
  45         c=$(git rev-parse --short HEAD) &&
  46         test_commit D &&
  47         d=$(git rev-parse --short HEAD) &&
  48         git merge --no-commit B &&
  49         test_tick &&
  50         git commit -m E &&
  51         git tag -m E E &&
  52         e=$(git rev-parse --short HEAD) &&
  53         git checkout -b second C &&
  54         test_commit F &&
  55         f=$(git rev-parse --short HEAD) &&
  56         test_commit G &&
  57         g=$(git rev-parse --short HEAD) &&
  58         git checkout main &&
  59         git merge --no-commit G &&
  60         test_tick &&
  61         git commit -m H &&
  62         h=$(git rev-parse --short HEAD) &&
  63         git tag -m H H &&
  64         git checkout A &&
  65         test_commit conflicting-G G.t
  66 '
  67
  68 test_expect_success 'create completely different structure' '
  69         cat >script-from-scratch <<-\EOF &&
  70         label onto
  71
  72         # onebranch
  73         pick G
  74         pick D
  75         label onebranch
  76
  77         # second
  78         reset onto
  79         pick B
  80         label second
  81
  82         reset onto
  83         merge -C H second
  84         merge onebranch # Merge the topic branch '\''onebranch'\''
  85         EOF
  86         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
  87         test_tick &&
  88         git rebase -i -r A main &&
  89         test_cmp_graph <<-\EOF
  90         *   Merge the topic branch '\''onebranch'\''
  91         |\
  92         | * D
  93         | * G
  94         * |   H
  95         |\ \
  96         | |/
  97         |/|
  98         | * B
  99         |/
 100         * A
 101         EOF
 102 '
 103
 104 test_expect_success 'generate correct todo list' '
 105         cat >expect <<-EOF &&
 106         label onto
 107
 108         reset onto
 109         pick $b B
 110         label E
 111
 112         reset onto
 113         pick $c C
 114         label branch-point
 115         pick $f F
 116         pick $g G
 117         label H
 118
 119         reset branch-point # C
 120         pick $d D
 121         merge -C $e E # E
 122         merge -C $h H # H
 123
 124         EOF
 125
 126         grep -v "^#" <.git/ORIGINAL-TODO >output &&
 127         test_cmp expect output
 128 '
 129
 130 test_expect_success '`reset` refuses to overwrite untracked files' '
 131         git checkout -b refuse-to-reset &&
 132         test_commit dont-overwrite-untracked &&
 133         git checkout @{-1} &&
 134         : >dont-overwrite-untracked.t &&
 135         echo "reset refs/tags/dont-overwrite-untracked" >script-from-scratch &&
 136         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 137         test_must_fail git rebase -ir HEAD &&
 138         git rebase --abort
 139 '
 140
 141 test_expect_success 'failed `merge -C` writes patch (may be rescheduled, too)' '
 142         test_when_finished "test_might_fail git rebase --abort" &&
 143         git checkout -b conflicting-merge A &&
 144
 145         : fail because of conflicting untracked file &&
 146         >G.t &&
 147         echo "merge -C H G" >script-from-scratch &&
 148         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 149         test_tick &&
 150         test_must_fail git rebase -ir HEAD &&
 151         grep "^merge -C .* G$" .git/rebase-merge/done &&
 152         grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
 153         test_path_is_file .git/rebase-merge/patch &&
 154
 155         : fail because of merge conflict &&
 156         rm G.t .git/rebase-merge/patch &&
 157         git reset --hard conflicting-G &&
 158         test_must_fail git rebase --continue &&
 159         ! grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
 160         test_path_is_file .git/rebase-merge/patch
 161 '
 162
 163 test_expect_success 'failed `merge <branch>` does not crash' '
 164         test_when_finished "test_might_fail git rebase --abort" &&
 165         git checkout conflicting-G &&
 166
 167         echo "merge G" >script-from-scratch &&
 168         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 169         test_tick &&
 170         test_must_fail git rebase -ir HEAD &&
 171         ! grep "^merge G$" .git/rebase-merge/git-rebase-todo &&
 172         grep "^Merge branch ${SQ}G${SQ}$" .git/rebase-merge/message
 173 '
 174
 175 test_expect_success 'merge -c commits before rewording and reloads todo-list' '
 176         cat >script-from-scratch <<-\EOF &&
 177         merge -c E B
 178         merge -c H G
 179         EOF
 180
 181         git checkout -b merge-c H &&
 182         (
 183                 set_reword_editor &&
 184                 GIT_SEQUENCE_EDITOR="\"$PWD/replace-editor.sh\"" \
 185                         git rebase -i -r D
 186         ) &&
 187         check_reworded_commits E H
 188 '
 189
 190 test_expect_success 'merge -c rewords when a strategy is given' '
 191         git checkout -b merge-c-with-strategy H &&
 192         write_script git-merge-override <<-\EOF &&
 193         echo overridden$1 >G.t
 194         git add G.t
 195         EOF
 196
 197         PATH="$PWD:$PATH" \
 198         GIT_SEQUENCE_EDITOR="echo merge -c H G >" \
 199         GIT_EDITOR="echo edited >>" \
 200                 git rebase --no-ff -ir -s override -Xxopt E &&
 201         test_write_lines overridden--xopt >expect &&
 202         test_cmp expect G.t &&
 203         test_write_lines H "" edited "" >expect &&
 204         git log --format=%B -1 >actual &&
 205         test_cmp expect actual
 206
 207 '
 208 test_expect_success 'with a branch tip that was cherry-picked already' '
 209         git checkout -b already-upstream main &&
 210         base="$(git rev-parse --verify HEAD)" &&
 211
 212         test_commit A1 &&
 213         test_commit A2 &&
 214         git reset --hard $base &&
 215         test_commit B1 &&
 216         test_tick &&
 217         git merge -m "Merge branch A" A2 &&
 218
 219         git checkout -b upstream-with-a2 $base &&
 220         test_tick &&
 221         git cherry-pick A2 &&
 222
 223         git checkout already-upstream &&
 224         test_tick &&
 225         git rebase -i -r upstream-with-a2 &&
 226         test_cmp_graph upstream-with-a2.. <<-\EOF
 227         *   Merge branch A
 228         |\
 229         | * A1
 230         * | B1
 231         |/
 232         o A2
 233         EOF
 234 '
 235
 236 test_expect_success 'do not rebase cousins unless asked for' '
 237         git checkout -b cousins main &&
 238         before="$(git rev-parse --verify HEAD)" &&
 239         test_tick &&
 240         git rebase -r HEAD^ &&
 241         test_cmp_rev HEAD $before &&
 242         test_tick &&
 243         git rebase --rebase-merges=rebase-cousins HEAD^ &&
 244         test_cmp_graph HEAD^.. <<-\EOF
 245         *   Merge the topic branch '\''onebranch'\''
 246         |\
 247         | * D
 248         | * G
 249         |/
 250         o H
 251         EOF
 252 '
 253
 254 test_expect_success 'refs/rewritten/* is worktree-local' '
 255         git worktree add wt &&
 256         cat >wt/script-from-scratch <<-\EOF &&
 257         label xyz
 258         exec GIT_DIR=../.git git rev-parse --verify refs/rewritten/xyz >a || :
 259         exec git rev-parse --verify refs/rewritten/xyz >b
 260         EOF
 261
 262         test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
 263         git -C wt rebase -i HEAD &&
 264         test_must_be_empty wt/a &&
 265         test_cmp_rev HEAD "$(cat wt/b)"
 266 '
 267
 268 test_expect_success '--abort cleans up refs/rewritten' '
 269         git checkout -b abort-cleans-refs-rewritten H &&
 270         GIT_SEQUENCE_EDITOR="echo break >>" git rebase -ir @^ &&
 271         git rev-parse --verify refs/rewritten/onto &&
 272         git rebase --abort &&
 273         test_must_fail git rev-parse --verify refs/rewritten/onto
 274 '
 275
 276 test_expect_success '--quit cleans up refs/rewritten' '
 277         git checkout -b quit-cleans-refs-rewritten H &&
 278         GIT_SEQUENCE_EDITOR="echo break >>" git rebase -ir @^ &&
 279         git rev-parse --verify refs/rewritten/onto &&
 280         git rebase --quit &&
 281         test_must_fail git rev-parse --verify refs/rewritten/onto
 282 '
 283
 284 test_expect_success 'post-rewrite hook and fixups work for merges' '
 285         git checkout -b post-rewrite H &&
 286         test_commit same1 &&
 287         git reset --hard HEAD^ &&
 288         test_commit same2 &&
 289         git merge -m "to fix up" same1 &&
 290         echo same old same old >same2.t &&
 291         test_tick &&
 292         git commit --fixup HEAD same2.t &&
 293         fixup="$(git rev-parse HEAD)" &&
 294
 295         mkdir -p .git/hooks &&
 296         test_when_finished "rm .git/hooks/post-rewrite" &&
 297         echo "cat >actual" | write_script .git/hooks/post-rewrite &&
 298
 299         test_tick &&
 300         git rebase -i --autosquash -r HEAD^^^ &&
 301         printf "%s %s\n%s %s\n%s %s\n%s %s\n" >expect $(git rev-parse \
 302                 $fixup^^2 HEAD^2 \
 303                 $fixup^^ HEAD^ \
 304                 $fixup^ HEAD \
 305                 $fixup HEAD) &&
 306         test_cmp expect actual
 307 '
 308
 309 test_expect_success 'refuse to merge ancestors of HEAD' '
 310         echo "merge HEAD^" >script-from-scratch &&
 311         test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
 312         before="$(git rev-parse HEAD)" &&
 313         git rebase -i HEAD &&
 314         test_cmp_rev HEAD $before
 315 '
 316
 317 test_expect_success 'root commits' '
 318         git checkout --orphan unrelated &&
 319         (GIT_AUTHOR_NAME="Parsnip" GIT_AUTHOR_EMAIL="root@example.com" \
 320          test_commit second-root) &&
 321         test_commit third-root &&
 322         cat >script-from-scratch <<-\EOF &&
 323         pick third-root
 324         label first-branch
 325         reset [new root]
 326         pick second-root
 327         merge first-branch # Merge the 3rd root
 328         EOF
 329         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 330         test_tick &&
 331         git rebase -i --force-rebase --root -r &&
 332         test "Parsnip" = "$(git show -s --format=%an HEAD^)" &&
 333         test $(git rev-parse second-root^0) != $(git rev-parse HEAD^) &&
 334         test $(git rev-parse second-root:second-root.t) = \
 335                 $(git rev-parse HEAD^:second-root.t) &&
 336         test_cmp_graph HEAD <<-\EOF &&
 337         *   Merge the 3rd root
 338         |\
 339         | * third-root
 340         * second-root
 341         EOF
 342
 343         : fast forward if possible &&
 344         before="$(git rev-parse --verify HEAD)" &&
 345         test_might_fail git config --unset sequence.editor &&
 346         test_tick &&
 347         git rebase -i --root -r &&
 348         test_cmp_rev HEAD $before
 349 '
 350
 351 test_expect_success 'a "merge" into a root commit is a fast-forward' '
 352         head=$(git rev-parse HEAD) &&
 353         cat >script-from-scratch <<-EOF &&
 354         reset [new root]
 355         merge $head
 356         EOF
 357         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 358         test_tick &&
 359         git rebase -i -r HEAD^ &&
 360         test_cmp_rev HEAD $head
 361 '
 362
 363 test_expect_success 'A root commit can be a cousin, treat it that way' '
 364         git checkout --orphan khnum &&
 365         test_commit yama &&
 366         git checkout -b asherah main &&
 367         test_commit shamkat &&
 368         git merge --allow-unrelated-histories khnum &&
 369         test_tick &&
 370         git rebase -f -r HEAD^ &&
 371         test_cmp_rev ! HEAD^2 khnum &&
 372         test_cmp_graph HEAD^.. <<-\EOF &&
 373         *   Merge branch '\''khnum'\'' into asherah
 374         |\
 375         | * yama
 376         o shamkat
 377         EOF
 378         test_tick &&
 379         git rebase --rebase-merges=rebase-cousins HEAD^ &&
 380         test_cmp_graph HEAD^.. <<-\EOF
 381         *   Merge branch '\''khnum'\'' into asherah
 382         |\
 383         | * yama
 384         |/
 385         o shamkat
 386         EOF
 387 '
 388
 389 test_expect_success 'labels that are object IDs are rewritten' '
 390         git checkout -b third B &&
 391         test_commit I &&
 392         third=$(git rev-parse HEAD) &&
 393         git checkout -b labels main &&
 394         git merge --no-commit third &&
 395         test_tick &&
 396         git commit -m "Merge commit '\''$third'\'' into labels" &&
 397         echo noop >script-from-scratch &&
 398         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 399         test_tick &&
 400         git rebase -i -r A &&
 401         grep "^label $third-" .git/ORIGINAL-TODO &&
 402         ! grep "^label $third$" .git/ORIGINAL-TODO
 403 '
 404
 405 test_expect_success 'octopus merges' '
 406         git checkout -b three &&
 407         test_commit before-octopus &&
 408         test_commit three &&
 409         git checkout -b two HEAD^ &&
 410         test_commit two &&
 411         git checkout -b one HEAD^ &&
 412         test_commit one &&
 413         test_tick &&
 414         (GIT_AUTHOR_NAME="Hank" GIT_AUTHOR_EMAIL="hank@sea.world" \
 415          git merge -m "Tüntenfüsch" two three) &&
 416
 417         : fast forward if possible &&
 418         before="$(git rev-parse --verify HEAD)" &&
 419         test_tick &&
 420         git rebase -i -r HEAD^^ &&
 421         test_cmp_rev HEAD $before &&
 422
 423         test_tick &&
 424         git rebase -i --force-rebase -r HEAD^^ &&
 425         test "Hank" = "$(git show -s --format=%an HEAD)" &&
 426         test "$before" != $(git rev-parse HEAD) &&
 427         test_cmp_graph HEAD^^.. <<-\EOF
 428         *-.   Tüntenfüsch
 429         |\ \
 430         | | * three
 431         | * | two
 432         | |/
 433         * / one
 434         |/
 435         o before-octopus
 436         EOF
 437 '
 438
 439 test_expect_success 'with --autosquash and --exec' '
 440         git checkout -b with-exec H &&
 441         echo Booh >B.t &&
 442         test_tick &&
 443         git commit --fixup B B.t &&
 444         write_script show.sh <<-\EOF &&
 445         subject="$(git show -s --format=%s HEAD)"
 446         content="$(git diff HEAD^ HEAD | tail -n 1)"
 447         echo "$subject: $content"
 448         EOF
 449         test_tick &&
 450         git rebase -ir --autosquash --exec ./show.sh A >actual &&
 451         grep "B: +Booh" actual &&
 452         grep "E: +Booh" actual &&
 453         grep "G: +G" actual
 454 '
 455
 456 test_expect_success '--continue after resolving conflicts after a merge' '
 457         git checkout -b already-has-g E &&
 458         git cherry-pick E..G &&
 459         test_commit H2 &&
 460
 461         git checkout -b conflicts-in-merge H &&
 462         test_commit H2 H2.t conflicts H2-conflict &&
 463         test_must_fail git rebase -r already-has-g &&
 464         grep conflicts H2.t &&
 465         echo resolved >H2.t &&
 466         git add -u &&
 467         git rebase --continue &&
 468         test_must_fail git rev-parse --verify HEAD^2 &&
 469         test_path_is_missing .git/MERGE_HEAD
 470 '
 471
 472 test_expect_success '--rebase-merges with strategies' '
 473         git checkout -b with-a-strategy F &&
 474         test_tick &&
 475         git merge -m "Merge conflicting-G" conflicting-G &&
 476
 477         : first, test with a merge strategy option &&
 478         git rebase -ir -Xtheirs G &&
 479         echo conflicting-G >expect &&
 480         test_cmp expect G.t &&
 481
 482         : now, try with a merge strategy other than recursive &&
 483         git reset --hard @{1} &&
 484         write_script git-merge-override <<-\EOF &&
 485         echo overridden$1 >>G.t
 486         git add G.t
 487         EOF
 488         PATH="$PWD:$PATH" git rebase -ir -s override -Xxopt G &&
 489         test_write_lines G overridden--xopt >expect &&
 490         test_cmp expect G.t
 491 '
 492
 493 test_expect_success '--rebase-merges with commit that can generate bad characters for filename' '
 494         git checkout -b colon-in-label E &&
 495         git merge -m "colon: this should work" G &&
 496         git rebase --rebase-merges --force-rebase E
 497 '
 498
 499 test_expect_success '--rebase-merges with message matched with onto label' '
 500         git checkout -b onto-label E &&
 501         git merge -m onto G &&
 502         git rebase --rebase-merges --force-rebase E &&
 503         test_cmp_graph <<-\EOF
 504         *   onto
 505         |\
 506         | * G
 507         | * F
 508         * |   E
 509         |\ \
 510         | * | B
 511         * | | D
 512         | |/
 513         |/|
 514         * | C
 515         |/
 516         * A
 517         EOF
 518 '
 519
 520 test_done