8f240b8bbb
builtin/merge is setup to allow multiple strategies to be specified, and it will find the "best" result and use it. This is defeated if some of the merge strategies abort early when they cannot handle the merge. Fix the logic that calls recursive and ort to not do such an early abort, but instead return "2" or "unhandled" so that the next strategy can try to handle the merge. Coming up with a testcase for this is somewhat difficult, since recursive and ort both handle nearly any two-headed merge (there is a separate code path that checks for non-two-headed merges and already returns "2" for them). So use a somewhat synthetic testcase of having the index not match HEAD before the merge starts, since all merge strategies will abort for that. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
295 lines
7.1 KiB
Bash
Executable File
295 lines
7.1 KiB
Bash
Executable File
#!/bin/sh
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test_description="merges with unrelated index changes"
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. ./test-lib.sh
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# Testcase for some simple merges
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# A
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# o-------o B
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# \
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# \-----o C
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# \
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# \---o D
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# \
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# \-o E
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# \
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# o F
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# Commit A: some file a
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# Commit B: adds file b, modifies end of a
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# Commit C: adds file c
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# Commit D: adds file d, modifies beginning of a
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# Commit E: renames a->subdir/a, adds subdir/e
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# Commit F: empty commit
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test_expect_success 'setup trivial merges' '
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test_seq 1 10 >a &&
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git add a &&
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test_tick && git commit -m A &&
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git branch A &&
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git branch B &&
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git branch C &&
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git branch D &&
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git branch E &&
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git branch F &&
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git checkout B &&
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echo b >b &&
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echo 11 >>a &&
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git add a b &&
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test_tick && git commit -m B &&
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git checkout C &&
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echo c >c &&
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git add c &&
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test_tick && git commit -m C &&
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git checkout D &&
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test_seq 2 10 >a &&
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echo d >d &&
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git add a d &&
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test_tick && git commit -m D &&
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git checkout E &&
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mkdir subdir &&
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git mv a subdir/a &&
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echo e >subdir/e &&
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git add subdir &&
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test_tick && git commit -m E &&
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git checkout F &&
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test_tick && git commit --allow-empty -m F
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'
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test_expect_success 'ff update' '
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git reset --hard &&
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git checkout A^0 &&
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touch random_file && git add random_file &&
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git merge E^0 &&
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test_must_fail git rev-parse HEAD:random_file &&
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test "$(git diff --name-only --cached E)" = "random_file" &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file
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'
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test_expect_success 'ff update, important file modified' '
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git reset --hard &&
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git checkout A^0 &&
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mkdir subdir &&
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touch subdir/e &&
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git add subdir/e &&
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test_must_fail git merge E^0 &&
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test_path_is_file subdir/e &&
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git rev-parse --verify :subdir/e &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'resolve, trivial' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s resolve C^0 &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'resolve, non-trivial' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s resolve D^0 &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'resolve, trivial, related file removed' '
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git reset --hard &&
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git checkout B^0 &&
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git rm a &&
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test_path_is_missing a &&
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test_must_fail git merge -s resolve C^0 &&
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test_path_is_missing a &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'resolve, non-trivial, related file removed' '
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git reset --hard &&
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git checkout B^0 &&
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git rm a &&
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test_path_is_missing a &&
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# We also ask for recursive in order to turn off the "allow_trivial"
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# setting in builtin/merge.c, and ensure that resolve really does
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# correctly fail the merge (I guess this also tests that recursive
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# correctly fails the merge, but the main thing we are attempting
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# to test here is resolve and are just using the side effect of
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# adding recursive to ensure that resolve is actually tested rather
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# than the trivial merge codepath)
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test_must_fail git merge -s resolve -s recursive D^0 &&
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test_path_is_missing a &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'recursive' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s recursive C^0 &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'recursive, when merge branch matches merge base' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s recursive F^0 &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'merge-recursive, when index==head but head!=HEAD' '
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git reset --hard &&
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git checkout C^0 &&
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# Make index match B
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git diff C B -- | git apply --cached &&
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test_when_finished "git clean -fd" && # Do not leave untracked around
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# Merge B & F, with B as "head"
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git merge-recursive A -- B F > out &&
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test_i18ngrep "Already up to date" out
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'
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test_expect_success 'recursive, when file has staged changes not matching HEAD nor what a merge would give' '
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git reset --hard &&
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git checkout B^0 &&
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mkdir subdir &&
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test_seq 1 10 >subdir/a &&
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git add subdir/a &&
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git rev-parse --verify :subdir/a >expect &&
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# We have staged changes; merge should error out
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test_must_fail git merge -s recursive E^0 2>err &&
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git rev-parse --verify :subdir/a >actual &&
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test_cmp expect actual &&
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test_i18ngrep "changes to the following files would be overwritten" err
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'
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test_expect_success 'recursive, when file has staged changes matching what a merge would give' '
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git reset --hard &&
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git checkout B^0 &&
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mkdir subdir &&
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test_seq 1 11 >subdir/a &&
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git add subdir/a &&
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git rev-parse --verify :subdir/a >expect &&
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# We have staged changes; merge should error out
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test_must_fail git merge -s recursive E^0 2>err &&
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git rev-parse --verify :subdir/a >actual &&
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test_cmp expect actual &&
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test_i18ngrep "changes to the following files would be overwritten" err
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'
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test_expect_success 'octopus, unrelated file touched' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge C^0 D^0 &&
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test_path_is_missing .git/MERGE_HEAD &&
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git rev-parse --verify :random_file &&
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test_path_exists random_file
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'
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test_expect_success 'octopus, related file removed' '
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git reset --hard &&
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git checkout B^0 &&
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git rm b &&
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test_must_fail git merge C^0 D^0 &&
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test_path_is_missing b &&
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test_must_fail git rev-parse --verify :b &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'octopus, related file modified' '
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git reset --hard &&
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git checkout B^0 &&
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echo 12 >>a && git add a &&
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git rev-parse --verify :a >expect &&
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test_must_fail git merge C^0 D^0 &&
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test_path_is_file a &&
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git rev-parse --verify :a >actual &&
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test_cmp expect actual &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'ours' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s ours C^0 &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'subtree' '
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git reset --hard &&
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git checkout B^0 &&
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touch random_file && git add random_file &&
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test_must_fail git merge -s subtree E^0 &&
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test_path_is_file random_file &&
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git rev-parse --verify :random_file &&
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test_path_is_missing .git/MERGE_HEAD
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'
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test_expect_success 'with multiple strategies, recursive or ort failure do not early abort' '
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git reset --hard &&
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git checkout B^0 &&
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test_seq 0 10 >a &&
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git add a &&
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sane_unset GIT_TEST_MERGE_ALGORITHM &&
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test_must_fail git merge -s recursive -s ort -s octopus C^0 >output 2>&1 &&
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grep "Trying merge strategy recursive..." output &&
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grep "Trying merge strategy ort..." output &&
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grep "Trying merge strategy octopus..." output &&
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grep "No merge strategy handled the merge." output
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'
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test_done
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