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git/t/t6050-replace.sh
Patrick Steinhardt 8960819e73 remote: fix leaking peer ref when expanding refmap 
When expanding remote refs via the refspec in `get_expanded_map()`, we
first copy the remote ref and then override its peer ref with the
expanded name. This may cause a memory leak though in case the peer ref
is already set, as this field is being copied by `copy_ref()`, as well.

Fix the leak by freeing the peer ref before we re-assign the field.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-22 09:18:06 -07:00

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#!/bin/sh
#
# Copyright (c) 2008 Christian Couder
#
test_description='Tests replace refs functionality'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
. "$TEST_DIRECTORY/lib-gpg.sh"
add_and_commit_file ()
{
_file="$1"
_msg="$2"
git add $_file || return $?
test_tick || return $?
git commit --quiet -m "$_file: $_msg"
}
commit_buffer_contains_parents ()
{
git cat-file commit "$1" >payload &&
sed -n -e '/^$/q' -e '/^parent /p' <payload >actual &&
shift &&
for _parent
do
echo "parent $_parent"
done >expected &&
test_cmp expected actual
}
commit_peeling_shows_parents ()
{
_parent_number=1
_commit="$1"
shift &&
for _parent
do
_found=$(git rev-parse --verify $_commit^$_parent_number) || return 1
test "$_found" = "$_parent" || return 1
_parent_number=$(( $_parent_number + 1 ))
done &&
test_must_fail git rev-parse --verify $_commit^$_parent_number 2>err &&
test_grep "Needed a single revision" err
}
commit_has_parents ()
{
commit_buffer_contains_parents "$@" &&
commit_peeling_shows_parents "$@"
}
HASH1=
HASH2=
HASH3=
HASH4=
HASH5=
HASH6=
HASH7=
test_expect_success 'set up buggy branch' '
echo "line 1" >>hello &&
echo "line 2" >>hello &&
echo "line 3" >>hello &&
echo "line 4" >>hello &&
add_and_commit_file hello "4 lines" &&
HASH1=$(git rev-parse --verify HEAD) &&
echo "line BUG" >>hello &&
echo "line 6" >>hello &&
echo "line 7" >>hello &&
echo "line 8" >>hello &&
add_and_commit_file hello "4 more lines with a BUG" &&
HASH2=$(git rev-parse --verify HEAD) &&
echo "line 9" >>hello &&
echo "line 10" >>hello &&
add_and_commit_file hello "2 more lines" &&
HASH3=$(git rev-parse --verify HEAD) &&
echo "line 11" >>hello &&
add_and_commit_file hello "1 more line" &&
HASH4=$(git rev-parse --verify HEAD) &&
sed -e "s/BUG/5/" hello >hello.new &&
mv hello.new hello &&
add_and_commit_file hello "BUG fixed" &&
HASH5=$(git rev-parse --verify HEAD) &&
echo "line 12" >>hello &&
echo "line 13" >>hello &&
add_and_commit_file hello "2 more lines" &&
HASH6=$(git rev-parse --verify HEAD) &&
echo "line 14" >>hello &&
echo "line 15" >>hello &&
echo "line 16" >>hello &&
add_and_commit_file hello "again 3 more lines" &&
HASH7=$(git rev-parse --verify HEAD)
'
test_expect_success 'replace the author' '
git cat-file commit $HASH2 | grep "author A U Thor" &&
R=$(git cat-file commit $HASH2 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
git cat-file commit $R | grep "author O Thor" &&
git update-ref refs/replace/$HASH2 $R &&
git show HEAD~5 | grep "O Thor" &&
git show $HASH2 | grep "O Thor"
'
test_expect_success 'test --no-replace-objects option' '
git cat-file commit $HASH2 | grep "author O Thor" &&
git --no-replace-objects cat-file commit $HASH2 | grep "author A U Thor" &&
git show $HASH2 | grep "O Thor" &&
git --no-replace-objects show $HASH2 | grep "A U Thor"
'
test_expect_success 'test GIT_NO_REPLACE_OBJECTS env variable' '
GIT_NO_REPLACE_OBJECTS=1 git cat-file commit $HASH2 | grep "author A U Thor" &&
GIT_NO_REPLACE_OBJECTS=1 git show $HASH2 | grep "A U Thor"
'
test_expect_success 'test core.usereplacerefs config option' '
test_config core.usereplacerefs false &&
git cat-file commit $HASH2 | grep "author A U Thor" &&
git show $HASH2 | grep "A U Thor"
'
cat >tag.sig <<EOF
object $HASH2
type commit
tag mytag
tagger T A Gger <> 0 +0000
EOF
test_expect_success 'tag replaced commit' '
git update-ref refs/tags/mytag $(git mktag <tag.sig)
'
test_expect_success '"git fsck" works' '
git fsck main >fsck_main.out &&
test_grep "dangling commit $R" fsck_main.out &&
test_grep "dangling tag $(git show-ref -s refs/tags/mytag)" fsck_main.out &&
test -z "$(git fsck)"
'
test_expect_success 'repack, clone and fetch work' '
git repack -a -d &&
git clone --no-hardlinks . clone_dir &&
(
cd clone_dir &&
git show HEAD~5 | grep "A U Thor" &&
git show $HASH2 | grep "A U Thor" &&
git cat-file commit $R &&
git repack -a -d &&
test_must_fail git cat-file commit $R &&
git fetch ../ "refs/replace/*:refs/replace/*" &&
git show HEAD~5 | grep "O Thor" &&
git show $HASH2 | grep "O Thor" &&
git cat-file commit $R
)
'
test_expect_success '"git replace" listing and deleting' '
test "$HASH2" = "$(git replace -l)" &&
test "$HASH2" = "$(git replace)" &&
aa=${HASH2%??????????????????????????????????????} &&
test "$HASH2" = "$(git replace --list "$aa*")" &&
test_must_fail git replace -d $R &&
test_must_fail git replace --delete &&
test_must_fail git replace -l -d $HASH2 &&
git replace -d $HASH2 &&
git show $HASH2 | grep "A U Thor" &&
test -z "$(git replace -l)"
'
test_expect_success '"git replace" replacing' '
git replace $HASH2 $R &&
git show $HASH2 | grep "O Thor" &&
test_must_fail git replace $HASH2 $R &&
git replace -f $HASH2 $R &&
test_must_fail git replace -f &&
test "$HASH2" = "$(git replace)"
'
test_expect_success '"git replace" resolves sha1' '
SHORTHASH2=$(git rev-parse --short=8 $HASH2) &&
git replace -d $SHORTHASH2 &&
git replace $SHORTHASH2 $R &&
git show $HASH2 | grep "O Thor" &&
test_must_fail git replace $HASH2 $R &&
git replace -f $HASH2 $R &&
test_must_fail git replace --force &&
test "$HASH2" = "$(git replace)"
'
# This creates a side branch where the bug in H2
# does not appear because P2 is created by applying
# H2 and squashing H5 into it.
# P3, P4 and P6 are created by cherry-picking H3, H4
# and H6 respectively.
#
# At this point, we should have the following:
#
# P2--P3--P4--P6
# /
# H1-H2-H3-H4-H5-H6-H7
#
# Then we replace H6 with P6.
#
test_expect_success 'create parallel branch without the bug' '
git replace -d $HASH2 &&
git show $HASH2 | grep "A U Thor" &&
git checkout $HASH1 &&
git cherry-pick $HASH2 &&
git show $HASH5 | git apply &&
git commit --amend -m "hello: 4 more lines WITHOUT the bug" hello &&
PARA2=$(git rev-parse --verify HEAD) &&
git cherry-pick $HASH3 &&
PARA3=$(git rev-parse --verify HEAD) &&
git cherry-pick $HASH4 &&
PARA4=$(git rev-parse --verify HEAD) &&
git cherry-pick $HASH6 &&
PARA6=$(git rev-parse --verify HEAD) &&
git replace $HASH6 $PARA6 &&
git checkout main &&
cur=$(git rev-parse --verify HEAD) &&
test "$cur" = "$HASH7" &&
git log --pretty=oneline | grep $PARA2 &&
git remote add cloned ./clone_dir
'
test_expect_success 'push to cloned repo' '
git push cloned $HASH6^:refs/heads/parallel &&
(
cd clone_dir &&
git checkout parallel &&
git log --pretty=oneline | grep $PARA2
)
'
test_expect_success 'push branch with replacement' '
git cat-file commit $PARA3 | grep "author A U Thor" &&
S=$(git cat-file commit $PARA3 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
git cat-file commit $S | grep "author O Thor" &&
git replace $PARA3 $S &&
git show $HASH6~2 | grep "O Thor" &&
git show $PARA3 | grep "O Thor" &&
git push cloned $HASH6^:refs/heads/parallel2 &&
(
cd clone_dir &&
git checkout parallel2 &&
git log --pretty=oneline | grep $PARA3 &&
git show $PARA3 | grep "A U Thor"
)
'
test_expect_success 'fetch branch with replacement' '
git branch tofetch $HASH6 &&
(
cd clone_dir &&
git fetch origin refs/heads/tofetch:refs/heads/parallel3 &&
git log --pretty=oneline parallel3 >output.txt &&
! grep $PARA3 output.txt &&
git show $PARA3 >para3.txt &&
grep "A U Thor" para3.txt &&
git fetch origin "refs/replace/*:refs/replace/*" &&
git log --pretty=oneline parallel3 >output.txt &&
grep $PARA3 output.txt &&
git show $PARA3 >para3.txt &&
grep "O Thor" para3.txt
)
'
test_expect_success 'bisect and replacements' '
git bisect start $HASH7 $HASH1 &&
test "$PARA3" = "$(git rev-parse --verify HEAD)" &&
git bisect reset &&
GIT_NO_REPLACE_OBJECTS=1 git bisect start $HASH7 $HASH1 &&
test "$HASH4" = "$(git rev-parse --verify HEAD)" &&
git bisect reset &&
git --no-replace-objects bisect start $HASH7 $HASH1 &&
test "$HASH4" = "$(git rev-parse --verify HEAD)" &&
git bisect reset
'
test_expect_success 'index-pack and replacements' '
git --no-replace-objects rev-list --objects HEAD |
git --no-replace-objects pack-objects test- &&
git index-pack test-*.pack
'
test_expect_success 'not just commits' '
echo replaced >file &&
git add file &&
REPLACED=$(git rev-parse :file) &&
mv file file.replaced &&
echo original >file &&
git add file &&
ORIGINAL=$(git rev-parse :file) &&
git update-ref refs/replace/$ORIGINAL $REPLACED &&
mv file file.original &&
git checkout file &&
test_cmp file.replaced file
'
test_expect_success 'replaced and replacement objects must be of the same type' '
test_must_fail git replace mytag $HASH1 &&
test_must_fail git replace HEAD^{tree} HEAD~1 &&
BLOB=$(git rev-parse :file) &&
test_must_fail git replace HEAD^ $BLOB
'
test_expect_success '-f option bypasses the type check' '
git replace -f mytag $HASH1 &&
git replace --force HEAD^{tree} HEAD~1 &&
git replace -f HEAD^ $BLOB
'
test_expect_success 'git cat-file --batch works on replace objects' '
git replace | grep $PARA3 &&
echo $PARA3 | git cat-file --batch
'
test_expect_success 'test --format bogus' '
test_must_fail git replace --format bogus >/dev/null 2>&1
'
test_expect_success 'test --format short' '
git replace --format=short >actual &&
git replace >expected &&
test_cmp expected actual
'
test_expect_success 'test --format medium' '
H1=$(git --no-replace-objects rev-parse HEAD~1) &&
HT=$(git --no-replace-objects rev-parse HEAD^{tree}) &&
MYTAG=$(git --no-replace-objects rev-parse mytag) &&
{
echo "$H1 -> $BLOB" &&
echo "$BLOB -> $REPLACED" &&
echo "$HT -> $H1" &&
echo "$PARA3 -> $S" &&
echo "$MYTAG -> $HASH1"
} | sort >expected &&
git replace -l --format medium | sort >actual &&
test_cmp expected actual
'
test_expect_success 'test --format long' '
{
echo "$H1 (commit) -> $BLOB (blob)" &&
echo "$BLOB (blob) -> $REPLACED (blob)" &&
echo "$HT (tree) -> $H1 (commit)" &&
echo "$PARA3 (commit) -> $S (commit)" &&
echo "$MYTAG (tag) -> $HASH1 (commit)"
} | sort >expected &&
git replace --format=long | sort >actual &&
test_cmp expected actual
'
test_expect_success 'setup fake editors' '
write_script fakeeditor <<-\EOF &&
sed -e "s/A U Thor/A fake Thor/" "$1" >"$1.new"
mv "$1.new" "$1"
EOF
write_script failingfakeeditor <<-\EOF
./fakeeditor "$@"
false
EOF
'
test_expect_success '--edit with and without already replaced object' '
test_must_fail env GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
GIT_EDITOR=./fakeeditor git replace --force --edit "$PARA3" &&
git replace -l | grep "$PARA3" &&
git cat-file commit "$PARA3" | grep "A fake Thor" &&
git replace -d "$PARA3" &&
GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
git replace -l | grep "$PARA3" &&
git cat-file commit "$PARA3" | grep "A fake Thor"
'
test_expect_success '--edit and change nothing or command failed' '
git replace -d "$PARA3" &&
test_must_fail env GIT_EDITOR=true git replace --edit "$PARA3" &&
test_must_fail env GIT_EDITOR="./failingfakeeditor" git replace --edit "$PARA3" &&
GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
git replace -l | grep "$PARA3" &&
git cat-file commit "$PARA3" | grep "A fake Thor"
'
test_expect_success 'replace ref cleanup' '
test -n "$(git replace)" &&
git replace -d $(git replace) &&
test -z "$(git replace)"
'
test_expect_success '--graft with and without already replaced object' '
git log --oneline >log &&
test_line_count = 7 log &&
git replace --graft $HASH5 &&
git log --oneline >log &&
test_line_count = 3 log &&
commit_has_parents $HASH5 &&
test_must_fail git replace --graft $HASH5 $HASH4 $HASH3 &&
git replace --force -g $HASH5 $HASH4 $HASH3 &&
commit_has_parents $HASH5 $HASH4 $HASH3 &&
git replace -d $HASH5
'
test_expect_success '--graft using a tag as the new parent' '
git tag new_parent $HASH5 &&
git replace --graft $HASH7 new_parent &&
commit_has_parents $HASH7 $HASH5 &&
git replace -d $HASH7 &&
git tag -a -m "annotated new parent tag" annotated_new_parent $HASH5 &&
git replace --graft $HASH7 annotated_new_parent &&
commit_has_parents $HASH7 $HASH5 &&
git replace -d $HASH7
'
test_expect_success '--graft using a tag as the replaced object' '
git tag replaced_object $HASH7 &&
git replace --graft replaced_object $HASH5 &&
commit_has_parents $HASH7 $HASH5 &&
git replace -d $HASH7 &&
git tag -a -m "annotated replaced object tag" annotated_replaced_object $HASH7 &&
git replace --graft annotated_replaced_object $HASH5 &&
commit_has_parents $HASH7 $HASH5 &&
git replace -d $HASH7
'
test_expect_success GPG 'set up a signed commit' '
echo "line 17" >>hello &&
echo "line 18" >>hello &&
git add hello &&
test_tick &&
git commit --quiet -S -m "hello: 2 more lines in a signed commit" &&
HASH8=$(git rev-parse --verify HEAD) &&
git verify-commit $HASH8
'
test_expect_success GPG '--graft with a signed commit' '
git cat-file commit $HASH8 >orig &&
git replace --graft $HASH8 &&
git cat-file commit $HASH8 >repl &&
commit_has_parents $HASH8 &&
test_must_fail git verify-commit $HASH8 &&
sed -n -e "/^tree /p" -e "/^author /p" -e "/^committer /p" orig >expected &&
echo >>expected &&
sed -e "/^$/q" repl >actual &&
test_cmp expected actual &&
git replace -d $HASH8
'
test_expect_success GPG 'set up a merge commit with a mergetag' '
git reset --hard HEAD &&
git checkout -b test_branch HEAD~2 &&
echo "line 1 from test branch" >>hello &&
echo "line 2 from test branch" >>hello &&
git add hello &&
test_tick &&
git commit -m "hello: 2 more lines from a test branch" &&
HASH9=$(git rev-parse --verify HEAD) &&
git tag -s -m "tag for testing with a mergetag" test_tag HEAD &&
git checkout main &&
git merge -s ours test_tag &&
HASH10=$(git rev-parse --verify HEAD) &&
git cat-file commit $HASH10 | grep "^mergetag object"
'
test_expect_success GPG '--graft on a commit with a mergetag' '
test_must_fail git replace --graft $HASH10 $HASH8^1 &&
git replace --graft $HASH10 $HASH8^1 $HASH9 &&
git replace -d $HASH10
'
test_expect_success '--convert-graft-file' '
git checkout -b with-graft-file &&
test_commit root2 &&
git reset --hard root2^ &&
test_commit root1 &&
test_commit after-root1 &&
test_tick &&
git merge -m merge-root2 root2 &&
: add and convert graft file &&
printf "%s\n%s %s\n\n# comment\n%s\n" \
$(git rev-parse HEAD^^ HEAD^ HEAD^^ HEAD^2) \
>.git/info/grafts &&
git status 2>stderr &&
test_grep "hint:.*grafts is deprecated" stderr &&
git replace --convert-graft-file 2>stderr &&
test_grep ! "hint:.*grafts is deprecated" stderr &&
test_path_is_missing .git/info/grafts &&
: verify that the history is now "grafted" &&
git rev-list HEAD >out &&
test_line_count = 4 out &&
: create invalid graft file and verify that it is not deleted &&
test_when_finished "rm -f .git/info/grafts" &&
echo $EMPTY_BLOB $EMPTY_TREE >.git/info/grafts &&
test_must_fail git replace --convert-graft-file 2>err &&
test_grep "$EMPTY_BLOB $EMPTY_TREE" err &&
test_grep "$EMPTY_BLOB $EMPTY_TREE" .git/info/grafts
'
test_done
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