#!/bin/sh
test_description="merges with unrelated index changes"
. ./test-lib.sh
# Testcase for some simple merges
# A
# o-------o B
# \
# \-----o C
# \
# \---o D
# \
# \-o E
# \
# o F
# Commit A: some file a
# Commit B: adds file b, modifies end of a
# Commit C: adds file c
# Commit D: adds file d, modifies beginning of a
# Commit E: renames a->subdir/a, adds subdir/e
# Commit F: empty commit
test_expect_success 'setup trivial merges' '
test_seq 1 10 >a &&
git add a &&
test_tick && git commit -m A &&
git branch A &&
git branch B &&
git branch C &&
git branch D &&
git branch E &&
git branch F &&
git checkout B &&
echo b >b &&
echo 11 >>a &&
git add a b &&
test_tick && git commit -m B &&
git checkout C &&
echo c >c &&
git add c &&
test_tick && git commit -m C &&
git checkout D &&
test_seq 2 10 >a &&
echo d >d &&
git add a d &&
test_tick && git commit -m D &&
git checkout E &&
mkdir subdir &&
git mv a subdir/a &&
echo e >subdir/e &&
git add subdir &&
test_tick && git commit -m E &&
git checkout F &&
test_tick && git commit --allow-empty -m F
'
test_expect_success 'ff update' '
git reset --hard &&
git checkout A^0 &&
touch random_file && git add random_file &&
git merge E^0 &&
test_must_fail git rev-parse HEAD:random_file &&
test "$(git diff --name-only --cached E)" = "random_file" &&
test_path_is_file random_file &&
git rev-parse --verify :random_file
'
test_expect_success 'ff update, important file modified' '
git reset --hard &&
git checkout A^0 &&
mkdir subdir &&
touch subdir/e &&
git add subdir/e &&
test_must_fail git merge E^0 &&
test_path_is_file subdir/e &&
git rev-parse --verify :subdir/e &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'resolve, trivial' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s resolve C^0 &&
test_path_is_file random_file &&
git rev-parse --verify :random_file &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'resolve, non-trivial' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s resolve D^0 &&
test_path_is_file random_file &&
git rev-parse --verify :random_file &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'resolve, trivial, related file removed' '
git reset --hard &&
git checkout B^0 &&
git rm a &&
test_path_is_missing a &&
test_must_fail git merge -s resolve C^0 &&
test_path_is_missing a &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'resolve, non-trivial, related file removed' '
git reset --hard &&
git checkout B^0 &&
git rm a &&
test_path_is_missing a &&
# We also ask for recursive in order to turn off the "allow_trivial"
# setting in builtin/merge.c, and ensure that resolve really does
# correctly fail the merge (I guess this also tests that recursive
# correctly fails the merge, but the main thing we are attempting
# to test here is resolve and are just using the side effect of
# adding recursive to ensure that resolve is actually tested rather
# than the trivial merge codepath)
test_must_fail git merge -s resolve -s recursive D^0 &&
test_path_is_missing a &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'recursive' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s recursive C^0 &&
test_path_is_file random_file &&
git rev-parse --verify :random_file &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'recursive, when merge branch matches merge base' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s recursive F^0 &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'merge-recursive, when index==head but head!=HEAD' '
git reset --hard &&
git checkout C^0 &&
# Make index match B
git diff C B -- | git apply --cached &&
test_when_finished "git clean -fd" && # Do not leave untracked around
# Merge B & F, with B as "head"
git merge-recursive A -- B F > out &&
test_grep "Already up to date" out
'
test_expect_success 'recursive, when file has staged changes not matching HEAD nor what a merge would give' '
git reset --hard &&
git checkout B^0 &&
mkdir subdir &&
test_seq 1 10 >subdir/a &&
git add subdir/a &&
git rev-parse --verify :subdir/a >expect &&
# We have staged changes; merge should error out
test_must_fail git merge -s recursive E^0 2>err &&
git rev-parse --verify :subdir/a >actual &&
test_cmp expect actual &&
test_grep "changes to the following files would be overwritten" err
'
test_expect_success 'recursive, when file has staged changes matching what a merge would give' '
git reset --hard &&
git checkout B^0 &&
mkdir subdir &&
test_seq 1 11 >subdir/a &&
git add subdir/a &&
git rev-parse --verify :subdir/a >expect &&
# We have staged changes; merge should error out
test_must_fail git merge -s recursive E^0 2>err &&
git rev-parse --verify :subdir/a >actual &&
test_cmp expect actual &&
test_grep "changes to the following files would be overwritten" err
'
test_expect_success 'octopus, unrelated file touched' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge C^0 D^0 &&
test_path_is_missing .git/MERGE_HEAD &&
git rev-parse --verify :random_file &&
test_path_exists random_file
'
test_expect_success 'octopus, related file removed' '
git reset --hard &&
git checkout B^0 &&
git rm b &&
test_must_fail git merge C^0 D^0 &&
test_path_is_missing b &&
test_must_fail git rev-parse --verify :b &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'octopus, related file modified' '
git reset --hard &&
git checkout B^0 &&
echo 12 >>a && git add a &&
git rev-parse --verify :a >expect &&
test_must_fail git merge C^0 D^0 &&
test_path_is_file a &&
git rev-parse --verify :a >actual &&
test_cmp expect actual &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'ours' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s ours C^0 &&
test_path_is_file random_file &&
git rev-parse --verify :random_file &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'subtree' '
git reset --hard &&
git checkout B^0 &&
touch random_file && git add random_file &&
test_must_fail git merge -s subtree E^0 &&
test_path_is_file random_file &&
git rev-parse --verify :random_file &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'avoid failure due to stat-dirty files' '
git reset --hard &&
git checkout B^0 &&
# Make "a" be stat-dirty
test-tool chmtime =+1 a &&
# stat-dirty file should not prevent stash creation in builtin/merge.c
git merge -s resolve -s recursive D^0
'
test_expect_success 'with multiple strategies, recursive or ort failure do not early abort' '
git reset --hard &&
git checkout B^0 &&
test_seq 0 10 >a &&
git add a &&
git rev-parse :a >expect &&
sane_unset GIT_TEST_MERGE_ALGORITHM &&
test_must_fail git merge -s recursive -s ort -s octopus C^0 >output 2>&1 &&
grep "Trying merge strategy recursive..." output &&
grep "Trying merge strategy ort..." output &&
grep "Trying merge strategy octopus..." output &&
grep "No merge strategy handled the merge." output &&
# Changes to "a" should remain staged
git rev-parse :a >actual &&
test_cmp expect actual
'
test_done
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