git/t/t6501-freshen-objects.sh
David Turner d0ab058498 tests: remove some direct access to .git/logs
Alternate refs backends might store reflogs somewhere other than
.git/logs.  Change most test code that directly accesses .git/logs to
instead use git reflog commands.

There are still a few tests which need direct access to reflogs: to
check reflog permissions, to manually create reflogs from scratch, to
save/restore reflogs, to check the format of raw reflog data, and to
remove not just reflog contents, but the reflogs themselves. All cases
which don't need direct access have been modified.

Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-28 11:46:46 -07:00

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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 &&
git reflog expire --expire=all --all
'
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