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git/t/t6501-freshen-objects.sh
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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 $commit | |
' | |
done | |
test_expect_success 'do not complain about existing broken links' ' | |
cat >broken-commit <<-\EOF && | |
tree 0000000000000000000000000000000000000001 | |
parent 0000000000000000000000000000000000000002 | |
author whatever <whatever@example.com> 1234 -0000 | |
committer whatever <whatever@example.com> 1234 -0000 | |
some message | |
EOF | |
commit=$(git hash-object -t commit -w broken-commit) && | |
git gc 2>stderr && | |
verbose git cat-file -e $commit && | |
test_must_be_empty stderr | |
' | |
test_done |