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            (master)
  16    \    \       /
  17     \    F - G                (second)
  18      \
  19       Conflicting-G
  20 '
  21 . ./test-lib.sh
  22 . "$TEST_DIRECTORY"/lib-rebase.sh
  23
  24 test_cmp_graph () {
  25         cat >expect &&
  26         git log --graph --boundary --format=%s "$@" >output &&
  27         sed "s/ *$//" <output >output.trimmed &&
  28         test_cmp expect output.trimmed
  29 }
  30
  31 test_expect_success 'setup' '
  32         write_script replace-editor.sh <<-\EOF &&
  33         mv "$1" "$(git rev-parse --git-path ORIGINAL-TODO)"
  34         cp script-from-scratch "$1"
  35         EOF
  36
  37         test_commit A &&
  38         git checkout -b first &&
  39         test_commit B &&
  40         git checkout master &&
  41         test_commit C &&
  42         test_commit D &&
  43         git merge --no-commit B &&
  44         test_tick &&
  45         git commit -m E &&
  46         git tag -m E E &&
  47         git checkout -b second C &&
  48         test_commit F &&
  49         test_commit G &&
  50         git checkout master &&
  51         git merge --no-commit G &&
  52         test_tick &&
  53         git commit -m H &&
  54         git tag -m H H &&
  55         git checkout A &&
  56         test_commit conflicting-G G.t
  57 '
  58
  59 test_expect_success 'create completely different structure' '
  60         cat >script-from-scratch <<-\EOF &&
  61         label onto
  62
  63         # onebranch
  64         pick G
  65         pick D
  66         label onebranch
  67
  68         # second
  69         reset onto
  70         pick B
  71         label second
  72
  73         reset onto
  74         merge -C H second
  75         merge onebranch # Merge the topic branch '\''onebranch'\''
  76         EOF
  77         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
  78         test_tick &&
  79         git rebase -i -r A master &&
  80         test_cmp_graph <<-\EOF
  81         *   Merge the topic branch '\''onebranch'\''
  82         |\
  83         | * D
  84         | * G
  85         * |   H
  86         |\ \
  87         | |/
  88         |/|
  89         | * B
  90         |/
  91         * A
  92         EOF
  93 '
  94
  95 test_expect_success 'generate correct todo list' '
  96         cat >expect <<-\EOF &&
  97         label onto
  98
  99         reset onto
 100         pick d9df450 B
 101         label E
 102
 103         reset onto
 104         pick 5dee784 C
 105         label branch-point
 106         pick ca2c861 F
 107         pick 088b00a G
 108         label H
 109
 110         reset branch-point # C
 111         pick 12bd07b D
 112         merge -C 2051b56 E # E
 113         merge -C 233d48a H # H
 114
 115         EOF
 116
 117         grep -v "^#" <.git/ORIGINAL-TODO >output &&
 118         test_cmp expect output
 119 '
 120
 121 test_expect_success '`reset` refuses to overwrite untracked files' '
 122         git checkout -b refuse-to-reset &&
 123         test_commit dont-overwrite-untracked &&
 124         git checkout @{-1} &&
 125         : >dont-overwrite-untracked.t &&
 126         echo "reset refs/tags/dont-overwrite-untracked" >script-from-scratch &&
 127         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 128         test_must_fail git rebase -r HEAD &&
 129         git rebase --abort
 130 '
 131
 132 test_expect_success 'failed `merge` writes patch (may be rescheduled, too)' '
 133         test_when_finished "test_might_fail git rebase --abort" &&
 134         git checkout -b conflicting-merge A &&
 135
 136         : fail because of conflicting untracked file &&
 137         >G.t &&
 138         echo "merge -C H G" >script-from-scratch &&
 139         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 140         test_tick &&
 141         test_must_fail git rebase -ir HEAD &&
 142         grep "^merge -C .* G$" .git/rebase-merge/done &&
 143         grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
 144         test_path_is_file .git/rebase-merge/patch &&
 145
 146         : fail because of merge conflict &&
 147         rm G.t .git/rebase-merge/patch &&
 148         git reset --hard conflicting-G &&
 149         test_must_fail git rebase --continue &&
 150         ! grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
 151         test_path_is_file .git/rebase-merge/patch
 152 '
 153
 154 test_expect_success 'with a branch tip that was cherry-picked already' '
 155         git checkout -b already-upstream master &&
 156         base="$(git rev-parse --verify HEAD)" &&
 157
 158         test_commit A1 &&
 159         test_commit A2 &&
 160         git reset --hard $base &&
 161         test_commit B1 &&
 162         test_tick &&
 163         git merge -m "Merge branch A" A2 &&
 164
 165         git checkout -b upstream-with-a2 $base &&
 166         test_tick &&
 167         git cherry-pick A2 &&
 168
 169         git checkout already-upstream &&
 170         test_tick &&
 171         git rebase -i -r upstream-with-a2 &&
 172         test_cmp_graph upstream-with-a2.. <<-\EOF
 173         *   Merge branch A
 174         |\
 175         | * A1
 176         * | B1
 177         |/
 178         o A2
 179         EOF
 180 '
 181
 182 test_expect_success 'do not rebase cousins unless asked for' '
 183         git checkout -b cousins master &&
 184         before="$(git rev-parse --verify HEAD)" &&
 185         test_tick &&
 186         git rebase -r HEAD^ &&
 187         test_cmp_rev HEAD $before &&
 188         test_tick &&
 189         git rebase --rebase-merges=rebase-cousins HEAD^ &&
 190         test_cmp_graph HEAD^.. <<-\EOF
 191         *   Merge the topic branch '\''onebranch'\''
 192         |\
 193         | * D
 194         | * G
 195         |/
 196         o H
 197         EOF
 198 '
 199
 200 test_expect_success 'refs/rewritten/* is worktree-local' '
 201         git worktree add wt &&
 202         cat >wt/script-from-scratch <<-\EOF &&
 203         label xyz
 204         exec GIT_DIR=../.git git rev-parse --verify refs/rewritten/xyz >a || :
 205         exec git rev-parse --verify refs/rewritten/xyz >b
 206         EOF
 207
 208         test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
 209         git -C wt rebase -i HEAD &&
 210         test_must_be_empty wt/a &&
 211         test_cmp_rev HEAD "$(cat wt/b)"
 212 '
 213
 214 test_expect_success 'post-rewrite hook and fixups work for merges' '
 215         git checkout -b post-rewrite &&
 216         test_commit same1 &&
 217         git reset --hard HEAD^ &&
 218         test_commit same2 &&
 219         git merge -m "to fix up" same1 &&
 220         echo same old same old >same2.t &&
 221         test_tick &&
 222         git commit --fixup HEAD same2.t &&
 223         fixup="$(git rev-parse HEAD)" &&
 224
 225         mkdir -p .git/hooks &&
 226         test_when_finished "rm .git/hooks/post-rewrite" &&
 227         echo "cat >actual" | write_script .git/hooks/post-rewrite &&
 228
 229         test_tick &&
 230         git rebase -i --autosquash -r HEAD^^^ &&
 231         printf "%s %s\n%s %s\n%s %s\n%s %s\n" >expect $(git rev-parse \
 232                 $fixup^^2 HEAD^2 \
 233                 $fixup^^ HEAD^ \
 234                 $fixup^ HEAD \
 235                 $fixup HEAD) &&
 236         test_cmp expect actual
 237 '
 238
 239 test_expect_success 'refuse to merge ancestors of HEAD' '
 240         echo "merge HEAD^" >script-from-scratch &&
 241         test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
 242         before="$(git rev-parse HEAD)" &&
 243         git rebase -i HEAD &&
 244         test_cmp_rev HEAD $before
 245 '
 246
 247 test_expect_success 'root commits' '
 248         git checkout --orphan unrelated &&
 249         (GIT_AUTHOR_NAME="Parsnip" GIT_AUTHOR_EMAIL="root@example.com" \
 250          test_commit second-root) &&
 251         test_commit third-root &&
 252         cat >script-from-scratch <<-\EOF &&
 253         pick third-root
 254         label first-branch
 255         reset [new root]
 256         pick second-root
 257         merge first-branch # Merge the 3rd root
 258         EOF
 259         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 260         test_tick &&
 261         git rebase -i --force --root -r &&
 262         test "Parsnip" = "$(git show -s --format=%an HEAD^)" &&
 263         test $(git rev-parse second-root^0) != $(git rev-parse HEAD^) &&
 264         test $(git rev-parse second-root:second-root.t) = \
 265                 $(git rev-parse HEAD^:second-root.t) &&
 266         test_cmp_graph HEAD <<-\EOF &&
 267         *   Merge the 3rd root
 268         |\
 269         | * third-root
 270         * second-root
 271         EOF
 272
 273         : fast forward if possible &&
 274         before="$(git rev-parse --verify HEAD)" &&
 275         test_might_fail git config --unset sequence.editor &&
 276         test_tick &&
 277         git rebase -i --root -r &&
 278         test_cmp_rev HEAD $before
 279 '
 280
 281 test_expect_success 'a "merge" into a root commit is a fast-forward' '
 282         head=$(git rev-parse HEAD) &&
 283         cat >script-from-scratch <<-EOF &&
 284         reset [new root]
 285         merge $head
 286         EOF
 287         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 288         test_tick &&
 289         git rebase -i -r HEAD^ &&
 290         test_cmp_rev HEAD $head
 291 '
 292
 293 test_expect_success 'A root commit can be a cousin, treat it that way' '
 294         git checkout --orphan khnum &&
 295         test_commit yama &&
 296         git checkout -b asherah master &&
 297         test_commit shamkat &&
 298         git merge --allow-unrelated-histories khnum &&
 299         test_tick &&
 300         git rebase -f -r HEAD^ &&
 301         ! test_cmp_rev HEAD^2 khnum &&
 302         test_cmp_graph HEAD^.. <<-\EOF &&
 303         *   Merge branch '\''khnum'\'' into asherah
 304         |\
 305         | * yama
 306         o shamkat
 307         EOF
 308         test_tick &&
 309         git rebase --rebase-merges=rebase-cousins HEAD^ &&
 310         test_cmp_graph HEAD^.. <<-\EOF
 311         *   Merge branch '\''khnum'\'' into asherah
 312         |\
 313         | * yama
 314         |/
 315         o shamkat
 316         EOF
 317 '
 318
 319 test_expect_success 'labels that are object IDs are rewritten' '
 320         git checkout -b third B &&
 321         test_commit I &&
 322         third=$(git rev-parse HEAD) &&
 323         git checkout -b labels master &&
 324         git merge --no-commit third &&
 325         test_tick &&
 326         git commit -m "Merge commit '\''$third'\'' into labels" &&
 327         echo noop >script-from-scratch &&
 328         test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
 329         test_tick &&
 330         git rebase -i -r A &&
 331         grep "^label $third-" .git/ORIGINAL-TODO &&
 332         ! grep "^label $third$" .git/ORIGINAL-TODO
 333 '
 334
 335 test_done