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|
#!/bin/sh
#
# This test covers the handling of objects which might have old
# mtimes in the filesystem (because they were used previously)
# and are just now becoming referenced again.
#
# We're going to do two things that are a little bit "fake" to
# help make our simulation easier:
#
# 1. We'll turn off reflogs. You can still run into
# problems with reflogs on, but your objects
# don't get pruned until both the reflog expiration
# has passed on their references, _and_ they are out
# of prune's expiration period. Dropping reflogs
# means we only have to deal with one variable in our tests,
# but the results generalize.
#
# 2. We'll use a temporary index file to create our
# works-in-progress. Most workflows would mention
# referenced objects in the index, which prune takes
# into account. However, many operations don't. For
# example, a partial commit with "git commit foo"
# will use a temporary index. Or they may not need
# an index at all (e.g., creating a new commit
# to refer to an existing tree).
test_description='check pruning of dependent objects'
. ./test-lib.sh
# We care about reachability, so we do not want to use
# the normal test_commit, which creates extra tags.
add () {
echo "$1" >"$1" &&
git add "$1"
}
commit () {
test_tick &&
add "$1" &&
git commit -m "$1"
}
maybe_repack () {
if test -n "$repack"; then
git repack -ad
fi
}
for repack in '' true; do
title=${repack:+repack}
title=${title:-loose}
test_expect_success "make repo completely empty ($title)" '
rm -rf .git &&
git init
'
test_expect_success "disable reflogs ($title)" '
git config core.logallrefupdates false &&
rm -rf .git/logs
'
test_expect_success "setup basic history ($title)" '
commit base
'
test_expect_success "create and abandon some objects ($title)" '
git checkout -b experiment &&
commit abandon &&
maybe_repack &&
git checkout master &&
git branch -D experiment
'
test_expect_success "simulate time passing ($title)" '
find .git/objects -type f |
xargs test-chmtime -v -86400
'
test_expect_success "start writing new commit with old blob ($title)" '
tree=$(
GIT_INDEX_FILE=index.tmp &&
export GIT_INDEX_FILE &&
git read-tree HEAD &&
add unrelated &&
add abandon &&
git write-tree
)
'
test_expect_success "simultaneous gc ($title)" '
git gc --prune=12.hours.ago
'
test_expect_success "finish writing out commit ($title)" '
commit=$(echo foo | git commit-tree -p HEAD $tree) &&
git update-ref HEAD $commit
'
# "abandon" blob should have been rescued by reference from new tree
test_expect_success "repository passes fsck ($title)" '
git fsck
'
test_expect_success "abandon objects again ($title)" '
git reset --hard HEAD^ &&
find .git/objects -type f |
xargs test-chmtime -v -86400
'
test_expect_success "start writing new commit with same tree ($title)" '
tree=$(
GIT_INDEX_FILE=index.tmp &&
export GIT_INDEX_FILE &&
git read-tree HEAD &&
add abandon &&
add unrelated &&
git write-tree
)
'
test_expect_success "simultaneous gc ($title)" '
git gc --prune=12.hours.ago
'
# tree should have been refreshed by write-tree
test_expect_success "finish writing out commit ($title)" '
commit=$(echo foo | git commit-tree -p HEAD $tree) &&
git update-ref HEAD $commit
'
done
test_done
|
