git/t/t3419-rebase-patch-id.sh
Jerry Zhang 93105aba6c patch-id: fix patch-id for mode changes
Currently patch-id as used in rebase and cherry-pick does not account
for file modes if the file is modified. One consequence of this is
that if you have a local patch that changes modes, but upstream
has applied an outdated version of the patch that doesn't include
that mode change, "git rebase" will drop your local version of the
patch along with your mode changes. It also means that internal
patch-id doesn't produce the same output as the builtin, which does
account for mode changes due to them being part of diff output.

Fix by adding mode to the patch-id if it has changed, in the same
format that would be produced by diff, so that it is compatible
with builtin patch-id.

Signed-off-by: Jerry Zhang <Jerry@skydio.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-10-24 15:44:20 -07:00

118 lines
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Executable File

#!/bin/sh
test_description='git rebase - test patch id computation'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
scramble () {
i=0
while read x
do
if test $i -ne 0
then
echo "$x"
fi
i=$((($i+1) % 10))
done <"$1" >"$1.new"
mv -f "$1.new" "$1"
}
test_expect_success 'setup' '
git commit --allow-empty -m initial &&
git tag root
'
test_expect_success 'setup: 500 lines' '
rm -f .gitattributes &&
git checkout -q -f main &&
git reset --hard root &&
test_seq 500 >file &&
git add file &&
git commit -q -m initial &&
git branch -f other &&
scramble file &&
git add file &&
git commit -q -m "change big file" &&
git checkout -q other &&
: >newfile &&
git add newfile &&
git commit -q -m "add small file" &&
git cherry-pick main >/dev/null 2>&1 &&
git branch -f squashed main &&
git checkout -q -f squashed &&
git reset -q --soft HEAD~2 &&
git commit -q -m squashed &&
git branch -f mode main &&
git checkout -q -f mode &&
test_chmod +x file &&
git commit -q -a --amend &&
git branch -f modeother other &&
git checkout -q -f modeother &&
test_chmod +x file &&
git commit -q -a --amend
'
test_expect_success 'detect upstream patch' '
git checkout -q main^{} &&
scramble file &&
git add file &&
git commit -q -m "change big file again" &&
git checkout -q other^{} &&
git rebase main &&
git rev-list main...HEAD~ >revs &&
test_must_be_empty revs
'
test_expect_success 'detect upstream patch binary' '
echo "file binary" >.gitattributes &&
git checkout -q other^{} &&
git rebase main &&
git rev-list main...HEAD~ >revs &&
test_must_be_empty revs &&
test_when_finished "rm .gitattributes"
'
test_expect_success 'detect upstream patch modechange' '
git checkout -q modeother^{} &&
git rebase mode &&
git rev-list mode...HEAD~ >revs &&
test_must_be_empty revs
'
test_expect_success 'do not drop patch' '
git checkout -q other^{} &&
test_must_fail git rebase squashed &&
test_when_finished "git rebase --abort"
'
test_expect_success 'do not drop patch binary' '
echo "file binary" >.gitattributes &&
git checkout -q other^{} &&
test_must_fail git rebase squashed &&
test_when_finished "git rebase --abort" &&
test_when_finished "rm .gitattributes"
'
test_expect_success 'do not drop patch modechange' '
git checkout -q modeother^{} &&
git rebase other &&
cat >expected <<-\EOF &&
diff --git a/file b/file
old mode 100644
new mode 100755
EOF
git diff HEAD~ >modediff &&
test_cmp expected modediff
'
test_done