EOF
'
+test_expect_success 'do not rebase cousins unless asked for' '
+ git checkout -b cousins master &&
+ before="$(git rev-parse --verify HEAD)" &&
+ test_tick &&
+ git rebase -r HEAD^ &&
+ test_cmp_rev HEAD $before &&
+ test_tick &&
+ git rebase --rebase-merges=rebase-cousins HEAD^ &&
+ test_cmp_graph HEAD^.. <<-\EOF
+ * Merge the topic branch '\''onebranch'\''
+ |\
+ | * D
+ | * G
+ |/
+ o H
+ EOF
+'
+
test_expect_success 'refs/rewritten/* is worktree-local' '
git worktree add wt &&
cat >wt/script-from-scratch <<-\EOF &&
test_cmp_rev HEAD "$(cat wt/b)"
'
+test_expect_success 'post-rewrite hook and fixups work for merges' '
+ git checkout -b post-rewrite &&
+ test_commit same1 &&
+ git reset --hard HEAD^ &&
+ test_commit same2 &&
+ git merge -m "to fix up" same1 &&
+ echo same old same old >same2.t &&
+ test_tick &&
+ git commit --fixup HEAD same2.t &&
+ fixup="$(git rev-parse HEAD)" &&
+
+ mkdir -p .git/hooks &&
+ test_when_finished "rm .git/hooks/post-rewrite" &&
+ echo "cat >actual" | write_script .git/hooks/post-rewrite &&
+
+ test_tick &&
+ git rebase -i --autosquash -r HEAD^^^ &&
+ printf "%s %s\n%s %s\n%s %s\n%s %s\n" >expect $(git rev-parse \
+ $fixup^^2 HEAD^2 \
+ $fixup^^ HEAD^ \
+ $fixup^ HEAD \
+ $fixup HEAD) &&
+ test_cmp expect actual
+'
+
+test_expect_success 'refuse to merge ancestors of HEAD' '
+ echo "merge HEAD^" >script-from-scratch &&
+ test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
+ before="$(git rev-parse HEAD)" &&
+ git rebase -i HEAD &&
+ test_cmp_rev HEAD $before
+'
+
+test_expect_success 'root commits' '
+ git checkout --orphan unrelated &&
+ (GIT_AUTHOR_NAME="Parsnip" GIT_AUTHOR_EMAIL="root@example.com" \
+ test_commit second-root) &&
+ test_commit third-root &&
+ cat >script-from-scratch <<-\EOF &&
+ pick third-root
+ label first-branch
+ reset [new root]
+ pick second-root
+ merge first-branch # Merge the 3rd root
+ EOF
+ test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
+ test_tick &&
+ git rebase -i --force --root -r &&
+ test "Parsnip" = "$(git show -s --format=%an HEAD^)" &&
+ test $(git rev-parse second-root^0) != $(git rev-parse HEAD^) &&
+ test $(git rev-parse second-root:second-root.t) = \
+ $(git rev-parse HEAD^:second-root.t) &&
+ test_cmp_graph HEAD <<-\EOF &&
+ * Merge the 3rd root
+ |\
+ | * third-root
+ * second-root
+ EOF
+
+ : fast forward if possible &&
+ before="$(git rev-parse --verify HEAD)" &&
+ test_might_fail git config --unset sequence.editor &&
+ test_tick &&
+ git rebase -i --root -r &&
+ test_cmp_rev HEAD $before
+'
+
+test_expect_success 'a "merge" into a root commit is a fast-forward' '
+ head=$(git rev-parse HEAD) &&
+ cat >script-from-scratch <<-EOF &&
+ reset [new root]
+ merge $head
+ EOF
+ test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
+ test_tick &&
+ git rebase -i -r HEAD^ &&
+ test_cmp_rev HEAD $head
+'
+
+test_expect_success 'A root commit can be a cousin, treat it that way' '
+ git checkout --orphan khnum &&
+ test_commit yama &&
+ git checkout -b asherah master &&
+ test_commit shamkat &&
+ git merge --allow-unrelated-histories khnum &&
+ test_tick &&
+ git rebase -f -r HEAD^ &&
+ ! test_cmp_rev HEAD^2 khnum &&
+ test_cmp_graph HEAD^.. <<-\EOF &&
+ * Merge branch '\''khnum'\'' into asherah
+ |\
+ | * yama
+ o shamkat
+ EOF
+ test_tick &&
+ git rebase --rebase-merges=rebase-cousins HEAD^ &&
+ test_cmp_graph HEAD^.. <<-\EOF
+ * Merge branch '\''khnum'\'' into asherah
+ |\
+ | * yama
+ |/
+ o shamkat
+ EOF
+'
+
+test_expect_success 'labels that are object IDs are rewritten' '
+ git checkout -b third B &&
+ test_commit I &&
+ third=$(git rev-parse HEAD) &&
+ git checkout -b labels master &&
+ git merge --no-commit third &&
+ test_tick &&
+ git commit -m "Merge commit '\''$third'\'' into labels" &&
+ echo noop >script-from-scratch &&
+ test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
+ test_tick &&
+ git rebase -i -r A &&
+ grep "^label $third-" .git/ORIGINAL-TODO &&
+ ! grep "^label $third$" .git/ORIGINAL-TODO
+'
+
test_done