git/t/t6436-merge-overwrite.sh

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#!/bin/sh
test_description='git-merge
Do not overwrite changes.'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
tests: mark tests relying on the current default for `init.defaultBranch` In addition to the manual adjustment to let the `linux-gcc` CI job run the test suite with `master` and then with `main`, this patch makes sure that GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME is set in all test scripts that currently rely on the initial branch name being `master by default. To determine which test scripts to mark up, the first step was to force-set the default branch name to `master` in - all test scripts that contain the keyword `master`, - t4211, which expects `t/t4211/history.export` with a hard-coded ref to initialize the default branch, - t5560 because it sources `t/t556x_common` which uses `master`, - t8002 and t8012 because both source `t/annotate-tests.sh` which also uses `master`) This trick was performed by this command: $ sed -i '/^ *\. \.\/\(test-lib\|lib-\(bash\|cvs\|git-svn\)\|gitweb-lib\)\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' $(git grep -l master t/t[0-9]*.sh) \ t/t4211*.sh t/t5560*.sh t/t8002*.sh t/t8012*.sh After that, careful, manual inspection revealed that some of the test scripts containing the needle `master` do not actually rely on a specific default branch name: either they mention `master` only in a comment, or they initialize that branch specificially, or they do not actually refer to the current default branch. Therefore, the aforementioned modification was undone in those test scripts thusly: $ git checkout HEAD -- \ t/t0027-auto-crlf.sh t/t0060-path-utils.sh \ t/t1011-read-tree-sparse-checkout.sh \ t/t1305-config-include.sh t/t1309-early-config.sh \ t/t1402-check-ref-format.sh t/t1450-fsck.sh \ t/t2024-checkout-dwim.sh \ t/t2106-update-index-assume-unchanged.sh \ t/t3040-subprojects-basic.sh t/t3301-notes.sh \ t/t3308-notes-merge.sh t/t3423-rebase-reword.sh \ t/t3436-rebase-more-options.sh \ t/t4015-diff-whitespace.sh t/t4257-am-interactive.sh \ t/t5323-pack-redundant.sh t/t5401-update-hooks.sh \ t/t5511-refspec.sh t/t5526-fetch-submodules.sh \ t/t5529-push-errors.sh t/t5530-upload-pack-error.sh \ t/t5548-push-porcelain.sh \ t/t5552-skipping-fetch-negotiator.sh \ t/t5572-pull-submodule.sh t/t5608-clone-2gb.sh \ t/t5614-clone-submodules-shallow.sh \ t/t7508-status.sh t/t7606-merge-custom.sh \ t/t9302-fast-import-unpack-limit.sh We excluded one set of test scripts in these commands, though: the range of `git p4` tests. The reason? `git p4` stores the (foreign) remote branch in the branch called `p4/master`, which is obviously not the default branch. Manual analysis revealed that only five of these tests actually require a specific default branch name to pass; They were modified thusly: $ sed -i '/^ *\. \.\/lib-git-p4\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' t/t980[0167]*.sh t/t9811*.sh Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-18 23:44:19 +00:00
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
'
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