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#!/bin/sh
test_description='git-merge
Do not overwrite changes.'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_expect_success 'setup' '
test_commit c0 c0.c &&
test_commit c1 c1.c &&
test_commit c1a c1.c "c1 a" &&
git reset --hard c0 &&
test_commit c2 c2.c &&
git reset --hard c0 &&
mkdir sub &&
echo "sub/f" > sub/f &&
mkdir sub2 &&
echo "sub2/f" > sub2/f &&
git add sub/f sub2/f &&
git commit -m sub &&
git tag sub &&
echo "VERY IMPORTANT CHANGES" > important
'
test_expect_success 'will not overwrite untracked file' '
git reset --hard c1 &&
cp important c2.c &&
test_must_fail git merge c2 &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important c2.c
'
test_expect_success 'will overwrite tracked file' '
git reset --hard c1 &&
cp important c2.c &&
git add c2.c &&
git commit -m important &&
git checkout c2
'
test_expect_success 'will not overwrite new file' '
git reset --hard c1 &&
cp important c2.c &&
git add c2.c &&
test_must_fail git merge c2 &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important c2.c
'
test_expect_success 'will not overwrite staged changes' '
git reset --hard c1 &&
cp important c2.c &&
git add c2.c &&
rm c2.c &&
test_must_fail git merge c2 &&
test_path_is_missing .git/MERGE_HEAD &&
git checkout c2.c &&
test_cmp important c2.c
'
test_expect_success 'will not overwrite removed file' '
git reset --hard c1 &&
git rm c1.c &&
git commit -m "rm c1.c" &&
cp important c1.c &&
test_must_fail git merge c1a &&
test_cmp important c1.c &&
rm c1.c # Do not leave untracked file in way of future tests
'
test_expect_success 'will not overwrite re-added file' '
git reset --hard c1 &&
git rm c1.c &&
git commit -m "rm c1.c" &&
cp important c1.c &&
git add c1.c &&
test_must_fail git merge c1a &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important c1.c
'
test_expect_success 'will not overwrite removed file with staged changes' '
git reset --hard c1 &&
git rm c1.c &&
git commit -m "rm c1.c" &&
cp important c1.c &&
git add c1.c &&
rm c1.c &&
test_must_fail git merge c1a &&
test_path_is_missing .git/MERGE_HEAD &&
git checkout c1.c &&
test_cmp important c1.c
'
test_expect_success 'will not overwrite unstaged changes in renamed file' '
git reset --hard c1 &&
git mv c1.c other.c &&
git commit -m rename &&
cp important other.c &&
if test "$GIT_TEST_MERGE_ALGORITHM" = ort
then
test_must_fail git merge c1a >out 2>err &&
test_i18ngrep "would be overwritten by merge" err &&
test_cmp important other.c &&
test_path_is_missing .git/MERGE_HEAD
else
test_must_fail git merge c1a >out &&
test_i18ngrep "Refusing to lose dirty file at other.c" out &&
test_path_is_file other.c~HEAD &&
test $(git hash-object other.c~HEAD) = $(git rev-parse c1a:c1.c) &&
test_cmp important other.c
fi
'
test_expect_success 'will not overwrite untracked subtree' '
git reset --hard c0 &&
rm -rf sub &&
mkdir -p sub/f &&
cp important sub/f/important &&
test_must_fail git merge sub &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important sub/f/important
'
cat >expect <<\EOF
error: The following untracked working tree files would be overwritten by merge:
sub
sub2
Please move or remove them before you merge.
Aborting
EOF
test_expect_success 'will not overwrite untracked file in leading path' '
git reset --hard c0 &&
rm -rf sub &&
cp important sub &&
cp important sub2 &&
test_must_fail git merge sub 2>out &&
test_cmp out expect &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important sub &&
test_cmp important sub2 &&
rm -f sub sub2
'
test_expect_success SYMLINKS 'will not overwrite untracked symlink in leading path' '
git reset --hard c0 &&
rm -rf sub &&
mkdir sub2 &&
ln -s sub2 sub &&
test_must_fail git merge sub &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success 'will not be confused by symlink in leading path' '
git reset --hard c0 &&
rm -rf sub &&
test_ln_s_add sub2 sub &&
git commit -m ln &&
git checkout sub
'
cat >expect <<\EOF
error: Untracked working tree file 'c0.c' would be overwritten by merge.
fatal: read-tree failed
EOF
test_expect_success 'will not overwrite untracked file on unborn branch' '
git reset --hard c0 &&
git rm -fr . &&
git checkout --orphan new &&
cp important c0.c &&
test_must_fail git merge c0 2>out &&
test_cmp out expect
'
test_expect_success 'will not overwrite untracked file on unborn branch .git/MERGE_HEAD sanity etc.' '
test_when_finished "rm c0.c" &&
test_path_is_missing .git/MERGE_HEAD &&
test_cmp important c0.c
'
test_expect_success 'failed merge leaves unborn branch in the womb' '
test_must_fail git rev-parse --verify HEAD
'
test_expect_success 'set up unborn branch and content' '
git symbolic-ref HEAD refs/heads/unborn &&
rm -f .git/index &&
echo foo > tracked-file &&
git add tracked-file &&
echo bar > untracked-file
'
test_expect_success 'will not clobber WT/index when merging into unborn' '
git merge main &&
grep foo tracked-file &&
git show :tracked-file >expect &&
grep foo expect &&
grep bar untracked-file
'
test_done
|
