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Diffstat (limited to 't/t6501-freshen-objects.sh')
| -rwxr-xr-x | t/t6501-freshen-objects.sh | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/t/t6501-freshen-objects.sh b/t/t6501-freshen-objects.sh new file mode 100755 index 0000000..1066245 --- /dev/null +++ b/t/t6501-freshen-objects.sh @@ -0,0 +1,183 @@ +#!/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' +GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main +export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME + +. ./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 "$1" +} + +maybe_repack () { + case "$title" in + loose) + : skip repack + ;; + repack) + git repack -ad + ;; + bitmap) + git repack -adb + ;; + *) + echo >&2 "unknown test type in maybe_repack" + return 1 + ;; + esac +} + +for title in loose repack bitmap +do + 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 main && + git branch -D experiment + ' + + test_expect_success "simulate time passing ($title)" ' + test-tool chmtime --get -86400 $(find .git/objects -type f) + ' + + test_expect_success "start writing new commit with old blob ($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^ && + test-tool chmtime --get -86400 $(find .git/objects -type f) + ' + + test_expect_success "start writing new commit with same tree ($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 (commit)' ' + cat >broken-commit <<-EOF && + tree $(test_oid 001) + parent $(test_oid 002) + author whatever <whatever@example.com> 1234 -0000 + committer whatever <whatever@example.com> 1234 -0000 + + some message + EOF + commit=$(git hash-object -t commit -w broken-commit) && + git gc -q 2>stderr && + verbose git cat-file -e $commit && + test_must_be_empty stderr +' + +test_expect_success 'do not complain about existing broken links (tree)' ' + cat >broken-tree <<-EOF && + 100644 blob $(test_oid 003) foo + EOF + tree=$(git mktree --missing <broken-tree) && + git gc -q 2>stderr && + git cat-file -e $tree && + test_must_be_empty stderr +' + +test_expect_success 'do not complain about existing broken links (tag)' ' + cat >broken-tag <<-EOF && + object $(test_oid 004) + type commit + tag broken + tagger whatever <whatever@example.com> 1234 -0000 + + this is a broken tag + EOF + tag=$(git hash-object -t tag -w broken-tag) && + git gc -q 2>stderr && + git cat-file -e $tag && + test_must_be_empty stderr +' + +test_done |