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Diffstat (limited to 'third_party/git/t/t5312-prune-corruption.sh')
| -rwxr-xr-x | third_party/git/t/t5312-prune-corruption.sh | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/git/t/t5312-prune-corruption.sh b/third_party/git/t/t5312-prune-corruption.sh new file mode 100755 index 000000000000..da9d59940d5a --- /dev/null +++ b/third_party/git/t/t5312-prune-corruption.sh @@ -0,0 +1,114 @@ +#!/bin/sh + +test_description=' +Test pruning of repositories with minor corruptions. The goal +here is that we should always be erring on the side of safety. So +if we see, for example, a ref with a bogus name, it is OK either to +bail out or to proceed using it as a reachable tip, but it is _not_ +OK to proceed as if it did not exist. Otherwise we might silently +delete objects that cannot be recovered. +' +. ./test-lib.sh + +test_expect_success 'disable reflogs' ' + git config core.logallrefupdates false && + git reflog expire --expire=all --all +' + +test_expect_success 'create history reachable only from a bogus-named ref' ' + test_tick && git commit --allow-empty -m master && + base=$(git rev-parse HEAD) && + test_tick && git commit --allow-empty -m bogus && + bogus=$(git rev-parse HEAD) && + git cat-file commit $bogus >saved && + echo $bogus >.git/refs/heads/bogus..name && + git reset --hard HEAD^ +' + +test_expect_success 'pruning does not drop bogus object' ' + test_when_finished "git hash-object -w -t commit saved" && + test_might_fail git prune --expire=now && + verbose git cat-file -e $bogus +' + +test_expect_success 'put bogus object into pack' ' + git tag reachable $bogus && + git repack -ad && + git tag -d reachable && + verbose git cat-file -e $bogus +' + +test_expect_success 'destructive repack keeps packed object' ' + test_might_fail git repack -Ad --unpack-unreachable=now && + verbose git cat-file -e $bogus && + test_might_fail git repack -ad && + verbose git cat-file -e $bogus +' + +# subsequent tests will have different corruptions +test_expect_success 'clean up bogus ref' ' + rm .git/refs/heads/bogus..name +' + +# We create two new objects here, "one" and "two". Our +# master branch points to "two", which is deleted, +# corrupting the repository. But we'd like to make sure +# that the otherwise unreachable "one" is not pruned +# (since it is the user's best bet for recovering +# from the corruption). +# +# Note that we also point HEAD somewhere besides "two", +# as we want to make sure we test the case where we +# pick up the reference to "two" by iterating the refs, +# not by resolving HEAD. +test_expect_success 'create history with missing tip commit' ' + test_tick && git commit --allow-empty -m one && + recoverable=$(git rev-parse HEAD) && + git cat-file commit $recoverable >saved && + test_tick && git commit --allow-empty -m two && + missing=$(git rev-parse HEAD) && + git checkout --detach $base && + rm .git/objects/$(echo $missing | sed "s,..,&/,") && + test_must_fail git cat-file -e $missing +' + +test_expect_success 'pruning with a corrupted tip does not drop history' ' + test_when_finished "git hash-object -w -t commit saved" && + test_might_fail git prune --expire=now && + verbose git cat-file -e $recoverable +' + +test_expect_success 'pack-refs does not silently delete broken loose ref' ' + git pack-refs --all --prune && + echo $missing >expect && + git rev-parse refs/heads/master >actual && + test_cmp expect actual +' + +# we do not want to count on running pack-refs to +# actually pack it, as it is perfectly reasonable to +# skip processing a broken ref +test_expect_success 'create packed-refs file with broken ref' ' + rm -f .git/refs/heads/master && + cat >.git/packed-refs <<-EOF && + $missing refs/heads/master + $recoverable refs/heads/other + EOF + echo $missing >expect && + git rev-parse refs/heads/master >actual && + test_cmp expect actual +' + +test_expect_success 'pack-refs does not silently delete broken packed ref' ' + git pack-refs --all --prune && + git rev-parse refs/heads/master >actual && + test_cmp expect actual +' + +test_expect_success 'pack-refs does not drop broken refs during deletion' ' + git update-ref -d refs/heads/other && + git rev-parse refs/heads/master >actual && + test_cmp expect actual +' + +test_done |