git-commit-vandalism/t/t5503-tagfollow.sh
Patrick Steinhardt 62091b4c87 fetch: report errors when backfilling tags fails
When the backfilling of tags fails we do not report this error to the
caller, but only report it implicitly at a later point when reporting
updated references. This leaves callers unable to act upon the
information of whether the backfilling succeeded or not.

Refactor the function to return an error code and pass it up the
callstack. This causes us to correctly propagate the error back to the
user of git-fetch(1).

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-02-17 11:19:44 -08:00

243 lines
5.6 KiB
Bash
Executable File

#!/bin/sh
test_description='test automatic tag following'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
# End state of the repository:
#
# T - tag1 S - tag2
# / /
# L - A ------ O ------ B
# \ \ \
# \ C - origin/cat \
# origin/main main
test_expect_success setup '
test_tick &&
echo ichi >file &&
git add file &&
git commit -m L &&
L=$(git rev-parse --verify HEAD) &&
(
mkdir cloned &&
cd cloned &&
git init-db &&
git remote add -f origin ..
) &&
test_tick &&
echo A >file &&
git add file &&
git commit -m A &&
A=$(git rev-parse --verify HEAD)
'
U=UPLOAD_LOG
UPATH="$(pwd)/$U"
test_expect_success 'setup expect' '
cat - <<EOF >expect
want $A
EOF
'
get_needs () {
test -s "$1" &&
perl -alne '
next unless $F[1] eq "upload-pack<";
next unless $F[2] eq "want";
print $F[2], " ", $F[3];
' "$1"
}
test_expect_success 'fetch A (new commit : 1 connection)' '
rm -f $U &&
(
cd cloned &&
GIT_TRACE_PACKET=$UPATH git fetch &&
test $A = $(git rev-parse --verify origin/main)
) &&
get_needs $U >actual &&
test_cmp expect actual
'
test_expect_success "create tag T on A, create C on branch cat" '
git tag -a -m tag1 tag1 $A &&
T=$(git rev-parse --verify tag1) &&
git checkout -b cat &&
echo C >file &&
git add file &&
git commit -m C &&
C=$(git rev-parse --verify HEAD) &&
git checkout main
'
test_expect_success 'setup expect' '
cat - <<EOF >expect
want $C
want $T
EOF
'
test_expect_success 'fetch C, T (new branch, tag : 1 connection)' '
rm -f $U &&
(
cd cloned &&
GIT_TRACE_PACKET=$UPATH git fetch &&
test $C = $(git rev-parse --verify origin/cat) &&
test $T = $(git rev-parse --verify tag1) &&
test $A = $(git rev-parse --verify tag1^0)
) &&
get_needs $U >actual &&
test_cmp expect actual
'
test_expect_success "create commits O, B, tag S on B" '
test_tick &&
echo O >file &&
git add file &&
git commit -m O &&
test_tick &&
echo B >file &&
git add file &&
git commit -m B &&
B=$(git rev-parse --verify HEAD) &&
git tag -a -m tag2 tag2 $B &&
S=$(git rev-parse --verify tag2)
'
test_expect_success 'setup expect' '
cat - <<EOF >expect
want $B
want $S
EOF
'
test_expect_success 'fetch B, S (commit and tag : 1 connection)' '
rm -f $U &&
(
cd cloned &&
GIT_TRACE_PACKET=$UPATH git fetch &&
test $B = $(git rev-parse --verify origin/main) &&
test $B = $(git rev-parse --verify tag2^0) &&
test $S = $(git rev-parse --verify tag2)
) &&
get_needs $U >actual &&
test_cmp expect actual
'
test_expect_success 'setup expect' '
cat - <<EOF >expect
want $B
want $S
EOF
'
test_expect_success 'new clone fetch main and tags' '
test_might_fail git branch -D cat &&
rm -f $U &&
(
mkdir clone2 &&
cd clone2 &&
git init &&
git remote add origin .. &&
GIT_TRACE_PACKET=$UPATH git fetch &&
test $B = $(git rev-parse --verify origin/main) &&
test $S = $(git rev-parse --verify tag2) &&
test $B = $(git rev-parse --verify tag2^0) &&
test $T = $(git rev-parse --verify tag1) &&
test $A = $(git rev-parse --verify tag1^0)
) &&
get_needs $U >actual &&
test_cmp expect actual
'
test_expect_success 'atomic fetch with failing backfill' '
git init clone3 &&
# We want to test whether a failure when backfilling tags correctly
# aborts the complete transaction when `--atomic` is passed: we should
# neither create the branch nor should we create the tag when either
# one of both fails to update correctly.
#
# To trigger failure we simply abort when backfilling a tag.
write_script clone3/.git/hooks/reference-transaction <<-\EOF &&
while read oldrev newrev reference
do
if test "$reference" = refs/tags/tag1
then
exit 1
fi
done
EOF
test_must_fail git -C clone3 fetch --atomic .. $B:refs/heads/something &&
# Creation of the tag has failed, so ideally refs/heads/something
# should not exist. The fact that it does demonstrates that there is
# a bug in the `--atomic` flag.
test $B = "$(git -C clone3 rev-parse --verify refs/heads/something)"
'
test_expect_success 'atomic fetch with backfill should use single transaction' '
git init clone4 &&
# Fetching with the `--atomic` flag should update all references in a
# single transaction, including backfilled tags. We thus expect to see
# a single reference transaction for the created branch and tags.
cat >expected <<-EOF &&
prepared
$ZERO_OID $B refs/heads/something
$ZERO_OID $S refs/tags/tag2
committed
$ZERO_OID $B refs/heads/something
$ZERO_OID $S refs/tags/tag2
prepared
$ZERO_OID $T refs/tags/tag1
committed
$ZERO_OID $T refs/tags/tag1
EOF
write_script clone4/.git/hooks/reference-transaction <<-\EOF &&
( echo "$*" && cat ) >>actual
EOF
git -C clone4 fetch --atomic .. $B:refs/heads/something &&
test_cmp expected clone4/actual
'
test_expect_success 'backfill failure causes command to fail' '
git init clone5 &&
write_script clone5/.git/hooks/reference-transaction <<-EOF &&
while read oldrev newrev reference
do
if test "\$reference" = refs/tags/tag1
then
# Create a nested tag below the actual tag we
# wanted to write, which causes a D/F conflict
# later when we want to commit refs/tags/tag1.
# We cannot just `exit 1` here given that this
# would cause us to die immediately.
git update-ref refs/tags/tag1/nested $B
exit \$!
fi
done
EOF
test_must_fail git -C clone5 fetch .. $B:refs/heads/something &&
test $B = $(git -C clone5 rev-parse --verify refs/heads/something) &&
test $S = $(git -C clone5 rev-parse --verify tag2) &&
test_must_fail git -C clone5 rev-parse --verify tag1
'
test_done