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