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Diffstat (limited to 't/t1450-fsck.sh')
| -rwxr-xr-x | t/t1450-fsck.sh | 818 |
1 files changed, 818 insertions, 0 deletions
diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh new file mode 100755 index 0000000000..50d28e6fdb --- /dev/null +++ b/t/t1450-fsck.sh @@ -0,0 +1,818 @@ +#!/bin/sh + +test_description='git fsck random collection of tests + +* (HEAD) B +* (master) A +' + +. ./test-lib.sh + +test_expect_success setup ' + test_oid_init && + git config gc.auto 0 && + git config i18n.commitencoding ISO-8859-1 && + test_commit A fileA one && + git config --unset i18n.commitencoding && + git checkout HEAD^0 && + test_commit B fileB two && + git tag -d A B && + git reflog expire --expire=now --all +' + +test_expect_success 'loose objects borrowed from alternate are not missing' ' + mkdir another && + ( + cd another && + git init && + echo ../../../.git/objects >.git/objects/info/alternates && + test_commit C fileC one && + git fsck --no-dangling >../actual 2>&1 + ) && + test_must_be_empty actual +' + +test_expect_success 'HEAD is part of refs, valid objects appear valid' ' + git fsck >actual 2>&1 && + test_must_be_empty actual +' + +# Corruption tests follow. Make sure to remove all traces of the +# specific corruption you test afterwards, lest a later test trip over +# it. + +test_expect_success 'setup: helpers for corruption tests' ' + sha1_file() { + remainder=${1#??} && + firsttwo=${1%$remainder} && + echo ".git/objects/$firsttwo/$remainder" + } && + + remove_object() { + rm "$(sha1_file "$1")" + } +' + +test_expect_success 'object with bad sha1' ' + sha=$(echo blob | git hash-object -w --stdin) && + old=$(test_oid_to_path "$sha") && + new=$(dirname $old)/$(test_oid ff_2) && + sha="$(dirname $new)$(basename $new)" && + mv .git/objects/$old .git/objects/$new && + test_when_finished "remove_object $sha" && + git update-index --add --cacheinfo 100644 $sha foo && + test_when_finished "git read-tree -u --reset HEAD" && + tree=$(git write-tree) && + test_when_finished "remove_object $tree" && + cmt=$(echo bogus | git commit-tree $tree) && + test_when_finished "remove_object $cmt" && + git update-ref refs/heads/bogus $cmt && + test_when_finished "git update-ref -d refs/heads/bogus" && + + test_must_fail git fsck 2>out && + test_i18ngrep "$sha.*corrupt" out +' + +test_expect_success 'branch pointing to non-commit' ' + git rev-parse HEAD^{tree} >.git/refs/heads/invalid && + test_when_finished "git update-ref -d refs/heads/invalid" && + test_must_fail git fsck 2>out && + test_i18ngrep "not a commit" out +' + +test_expect_success 'HEAD link pointing at a funny object' ' + test_when_finished "mv .git/SAVED_HEAD .git/HEAD" && + mv .git/HEAD .git/SAVED_HEAD && + echo $ZERO_OID >.git/HEAD && + # avoid corrupt/broken HEAD from interfering with repo discovery + test_must_fail env GIT_DIR=.git git fsck 2>out && + test_i18ngrep "detached HEAD points" out +' + +test_expect_success 'HEAD link pointing at a funny place' ' + test_when_finished "mv .git/SAVED_HEAD .git/HEAD" && + mv .git/HEAD .git/SAVED_HEAD && + echo "ref: refs/funny/place" >.git/HEAD && + # avoid corrupt/broken HEAD from interfering with repo discovery + test_must_fail env GIT_DIR=.git git fsck 2>out && + test_i18ngrep "HEAD points to something strange" out +' + +test_expect_success 'HEAD link pointing at a funny object (from different wt)' ' + test_when_finished "mv .git/SAVED_HEAD .git/HEAD" && + test_when_finished "rm -rf .git/worktrees wt" && + git worktree add wt && + mv .git/HEAD .git/SAVED_HEAD && + echo $ZERO_OID >.git/HEAD && + # avoid corrupt/broken HEAD from interfering with repo discovery + test_must_fail git -C wt fsck 2>out && + test_i18ngrep "main-worktree/HEAD: detached HEAD points" out +' + +test_expect_success 'other worktree HEAD link pointing at a funny object' ' + test_when_finished "rm -rf .git/worktrees other" && + git worktree add other && + echo $ZERO_OID >.git/worktrees/other/HEAD && + test_must_fail git fsck 2>out && + test_i18ngrep "worktrees/other/HEAD: detached HEAD points" out +' + +test_expect_success 'other worktree HEAD link pointing at missing object' ' + test_when_finished "rm -rf .git/worktrees other" && + git worktree add other && + echo "Contents missing from repo" | git hash-object --stdin >.git/worktrees/other/HEAD && + test_must_fail git fsck 2>out && + test_i18ngrep "worktrees/other/HEAD: invalid sha1 pointer" out +' + +test_expect_success 'other worktree HEAD link pointing at a funny place' ' + test_when_finished "rm -rf .git/worktrees other" && + git worktree add other && + echo "ref: refs/funny/place" >.git/worktrees/other/HEAD && + test_must_fail git fsck 2>out && + test_i18ngrep "worktrees/other/HEAD points to something strange" out +' + +test_expect_success 'email without @ is okay' ' + git cat-file commit HEAD >basis && + sed "s/@/AT/" basis >okay && + new=$(git hash-object -t commit -w --stdin <okay) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + git fsck 2>out && + cat out && + ! grep "commit $new" out +' + +test_expect_success 'email with embedded > is not okay' ' + git cat-file commit HEAD >basis && + sed "s/@[a-z]/&>/" basis >bad-email && + new=$(git hash-object -t commit -w --stdin <bad-email) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new" out +' + +test_expect_success 'missing < email delimiter is reported nicely' ' + git cat-file commit HEAD >basis && + sed "s/<//" basis >bad-email-2 && + new=$(git hash-object -t commit -w --stdin <bad-email-2) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new.* - bad name" out +' + +test_expect_success 'missing email is reported nicely' ' + git cat-file commit HEAD >basis && + sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 && + new=$(git hash-object -t commit -w --stdin <bad-email-3) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new.* - missing email" out +' + +test_expect_success '> in name is reported' ' + git cat-file commit HEAD >basis && + sed "s/ </> </" basis >bad-email-4 && + new=$(git hash-object -t commit -w --stdin <bad-email-4) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new" out +' + +# date is 2^64 + 1 +test_expect_success 'integer overflow in timestamps is reported' ' + git cat-file commit HEAD >basis && + sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \ + <basis >bad-timestamp && + new=$(git hash-object -t commit -w --stdin <bad-timestamp) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new.*integer overflow" out +' + +test_expect_success 'commit with NUL in header' ' + git cat-file commit HEAD >basis && + sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header && + new=$(git hash-object -t commit -w --stdin <commit-NUL-header) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $new.*unterminated header: NUL at offset" out +' + +test_expect_success 'tree object with duplicate entries' ' + test_when_finished "for i in \$T; do remove_object \$i; done" && + T=$( + GIT_INDEX_FILE=test-index && + export GIT_INDEX_FILE && + rm -f test-index && + >x && + git add x && + git rev-parse :x && + T=$(git write-tree) && + echo $T && + ( + git cat-file tree $T && + git cat-file tree $T + ) | + git hash-object -w -t tree --stdin + ) && + test_must_fail git fsck 2>out && + test_i18ngrep "error in tree .*contains duplicate file entries" out +' + +test_expect_success 'unparseable tree object' ' + test_oid_cache <<-\EOF && + junk sha1:twenty-bytes-of-junk + junk sha256:twenty-bytes-of-junk-twelve-more + EOF + + test_when_finished "git update-ref -d refs/heads/wrong" && + test_when_finished "remove_object \$tree_sha1" && + test_when_finished "remove_object \$commit_sha1" && + junk=$(test_oid junk) && + tree_sha1=$(printf "100644 \0$junk" | git hash-object -t tree --stdin -w --literally) && + commit_sha1=$(git commit-tree $tree_sha1) && + git update-ref refs/heads/wrong $commit_sha1 && + test_must_fail git fsck 2>out && + test_i18ngrep "error: empty filename in tree entry" out && + test_i18ngrep "$tree_sha1" out && + test_i18ngrep ! "fatal: empty filename in tree entry" out +' + +test_expect_success 'tree entry with type mismatch' ' + test_when_finished "remove_object \$blob" && + test_when_finished "remove_object \$tree" && + test_when_finished "remove_object \$commit" && + test_when_finished "git update-ref -d refs/heads/type_mismatch" && + blob=$(echo blob | git hash-object -w --stdin) && + blob_bin=$(echo $blob | hex2oct) && + tree=$( + printf "40000 dir\0${blob_bin}100644 file\0${blob_bin}" | + git hash-object -t tree --stdin -w --literally + ) && + commit=$(git commit-tree $tree) && + git update-ref refs/heads/type_mismatch $commit && + test_must_fail git fsck >out 2>&1 && + test_i18ngrep "is a blob, not a tree" out && + test_i18ngrep ! "dangling blob" out +' + +test_expect_success 'tag pointing to nonexistent' ' + badoid=$(test_oid deadbeef) && + cat >invalid-tag <<-EOF && + object $badoid + type commit + tag invalid + tagger T A Gger <tagger@example.com> 1234567890 -0000 + + This is an invalid tag. + EOF + + tag=$(git hash-object -t tag -w --stdin <invalid-tag) && + test_when_finished "remove_object $tag" && + echo $tag >.git/refs/tags/invalid && + test_when_finished "git update-ref -d refs/tags/invalid" && + test_must_fail git fsck --tags >out && + test_i18ngrep "broken link" out +' + +test_expect_success 'tag pointing to something else than its type' ' + sha=$(echo blob | git hash-object -w --stdin) && + test_when_finished "remove_object $sha" && + cat >wrong-tag <<-EOF && + object $sha + type commit + tag wrong + tagger T A Gger <tagger@example.com> 1234567890 -0000 + + This is an invalid tag. + EOF + + tag=$(git hash-object -t tag -w --stdin <wrong-tag) && + test_when_finished "remove_object $tag" && + echo $tag >.git/refs/tags/wrong && + test_when_finished "git update-ref -d refs/tags/wrong" && + test_must_fail git fsck --tags +' + +test_expect_success 'tag with incorrect tag name & missing tagger' ' + sha=$(git rev-parse HEAD) && + cat >wrong-tag <<-EOF && + object $sha + type commit + tag wrong name format + + This is an invalid tag. + EOF + + tag=$(git hash-object -t tag -w --stdin <wrong-tag) && + test_when_finished "remove_object $tag" && + echo $tag >.git/refs/tags/wrong && + test_when_finished "git update-ref -d refs/tags/wrong" && + git fsck --tags 2>out && + + cat >expect <<-EOF && + warning in tag $tag: badTagName: invalid '\''tag'\'' name: wrong name format + warning in tag $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line + EOF + test_i18ncmp expect out +' + +test_expect_success 'tag with bad tagger' ' + sha=$(git rev-parse HEAD) && + cat >wrong-tag <<-EOF && + object $sha + type commit + tag not-quite-wrong + tagger Bad Tagger Name + + This is an invalid tag. + EOF + + tag=$(git hash-object --literally -t tag -w --stdin <wrong-tag) && + test_when_finished "remove_object $tag" && + echo $tag >.git/refs/tags/wrong && + test_when_finished "git update-ref -d refs/tags/wrong" && + test_must_fail git fsck --tags 2>out && + test_i18ngrep "error in tag .*: invalid author/committer" out +' + +test_expect_success 'tag with NUL in header' ' + sha=$(git rev-parse HEAD) && + q_to_nul >tag-NUL-header <<-EOF && + object $sha + type commit + tag contains-Q-in-header + tagger T A Gger <tagger@example.com> 1234567890 -0000 + + This is an invalid tag. + EOF + + tag=$(git hash-object --literally -t tag -w --stdin <tag-NUL-header) && + test_when_finished "remove_object $tag" && + echo $tag >.git/refs/tags/wrong && + test_when_finished "git update-ref -d refs/tags/wrong" && + test_must_fail git fsck --tags 2>out && + test_i18ngrep "error in tag $tag.*unterminated header: NUL at offset" out +' + +test_expect_success 'cleaned up' ' + git fsck >actual 2>&1 && + test_must_be_empty actual +' + +test_expect_success 'rev-list --verify-objects' ' + git rev-list --verify-objects --all >/dev/null 2>out && + test_must_be_empty out +' + +test_expect_success 'rev-list --verify-objects with bad sha1' ' + sha=$(echo blob | git hash-object -w --stdin) && + old=$(test_oid_to_path $sha) && + new=$(dirname $old)/$(test_oid ff_2) && + sha="$(dirname $new)$(basename $new)" && + mv .git/objects/$old .git/objects/$new && + test_when_finished "remove_object $sha" && + git update-index --add --cacheinfo 100644 $sha foo && + test_when_finished "git read-tree -u --reset HEAD" && + tree=$(git write-tree) && + test_when_finished "remove_object $tree" && + cmt=$(echo bogus | git commit-tree $tree) && + test_when_finished "remove_object $cmt" && + git update-ref refs/heads/bogus $cmt && + test_when_finished "git update-ref -d refs/heads/bogus" && + + test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out && + test_i18ngrep -q "error: hash mismatch $(dirname $new)$(test_oid ff_2)" out +' + +test_expect_success 'force fsck to ignore double author' ' + git cat-file commit HEAD >basis && + sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors && + new=$(git hash-object -t commit -w --stdin <multiple-authors) && + test_when_finished "remove_object $new" && + git update-ref refs/heads/bogus "$new" && + test_when_finished "git update-ref -d refs/heads/bogus" && + test_must_fail git fsck && + git -c fsck.multipleAuthors=ignore fsck +' + +_bz='\0' +_bzoid=$(printf $ZERO_OID | sed -e 's/00/\\0/g') + +test_expect_success 'fsck notices blob entry pointing to null sha1' ' + (git init null-blob && + cd null-blob && + sha=$(printf "100644 file$_bz$_bzoid" | + git hash-object -w --stdin -t tree) && + git fsck 2>out && + test_i18ngrep "warning.*null sha1" out + ) +' + +test_expect_success 'fsck notices submodule entry pointing to null sha1' ' + (git init null-commit && + cd null-commit && + sha=$(printf "160000 submodule$_bz$_bzoid" | + git hash-object -w --stdin -t tree) && + git fsck 2>out && + test_i18ngrep "warning.*null sha1" out + ) +' + +while read name path pretty; do + while read mode type; do + : ${pretty:=$path} + test_expect_success "fsck notices $pretty as $type" ' + ( + git init $name-$type && + cd $name-$type && + echo content >file && + git add file && + git commit -m base && + blob=$(git rev-parse :file) && + tree=$(git rev-parse HEAD^{tree}) && + value=$(eval "echo \$$type") && + printf "$mode $type %s\t%s" "$value" "$path" >bad && + bad_tree=$(git mktree <bad) && + git fsck 2>out && + test_i18ngrep "warning.*tree $bad_tree" out + )' + done <<-\EOF + 100644 blob + 040000 tree + EOF +done <<-EOF +dot . +dotdot .. +dotgit .git +dotgit-case .GIT +dotgit-unicode .gI${u200c}T .gI{u200c}T +dotgit-case2 .Git +git-tilde1 git~1 +dotgitdot .git. +dot-backslash-case .\\\\.GIT\\\\foobar +dotgit-case-backslash .git\\\\foobar +EOF + +test_expect_success 'fsck allows .Ňit' ' + ( + git init not-dotgit && + cd not-dotgit && + echo content >file && + git add file && + git commit -m base && + blob=$(git rev-parse :file) && + printf "100644 blob $blob\t.\\305\\207it" >tree && + tree=$(git mktree <tree) && + git fsck 2>err && + test_line_count = 0 err + ) +' + +test_expect_success 'NUL in commit' ' + rm -fr nul-in-commit && + git init nul-in-commit && + ( + cd nul-in-commit && + git commit --allow-empty -m "initial commitQNUL after message" && + git cat-file commit HEAD >original && + q_to_nul <original >munged && + git hash-object -w -t commit --stdin <munged >name && + git branch bad $(cat name) && + + test_must_fail git -c fsck.nulInCommit=error fsck 2>warn.1 && + test_i18ngrep nulInCommit warn.1 && + git fsck 2>warn.2 && + test_i18ngrep nulInCommit warn.2 + ) +' + +# create a static test repo which is broken by omitting +# one particular object ($1, which is looked up via rev-parse +# in the new repository). +create_repo_missing () { + rm -rf missing && + git init missing && + ( + cd missing && + git commit -m one --allow-empty && + mkdir subdir && + echo content >subdir/file && + git add subdir/file && + git commit -m two && + unrelated=$(echo unrelated | git hash-object --stdin -w) && + git tag -m foo tag $unrelated && + sha1=$(git rev-parse --verify "$1") && + path=$(echo $sha1 | sed 's|..|&/|') && + rm .git/objects/$path + ) +} + +test_expect_success 'fsck notices missing blob' ' + create_repo_missing HEAD:subdir/file && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices missing subtree' ' + create_repo_missing HEAD:subdir && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices missing root tree' ' + create_repo_missing HEAD^{tree} && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices missing parent' ' + create_repo_missing HEAD^ && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices missing tagged object' ' + create_repo_missing tag^{blob} && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices ref pointing to missing commit' ' + create_repo_missing HEAD && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck notices ref pointing to missing tag' ' + create_repo_missing tag && + test_must_fail git -C missing fsck +' + +test_expect_success 'fsck --connectivity-only' ' + rm -rf connectivity-only && + git init connectivity-only && + ( + cd connectivity-only && + touch empty && + git add empty && + test_commit empty && + + # Drop the index now; we want to be sure that we + # recursively notice the broken objects + # because they are reachable from refs, not because + # they are in the index. + rm -f .git/index && + + # corrupt the blob, but in a way that we can still identify + # its type. That lets us see that --connectivity-only is + # not actually looking at the contents, but leaves it + # free to examine the type if it chooses. + empty=.git/objects/$(test_oid_to_path $EMPTY_BLOB) && + blob=$(echo unrelated | git hash-object -w --stdin) && + mv -f $(sha1_file $blob) $empty && + + test_must_fail git fsck --strict && + git fsck --strict --connectivity-only && + tree=$(git rev-parse HEAD:) && + suffix=${tree#??} && + tree=.git/objects/${tree%$suffix}/$suffix && + rm -f $tree && + echo invalid >$tree && + test_must_fail git fsck --strict --connectivity-only + ) +' + +test_expect_success 'fsck --connectivity-only with explicit head' ' + rm -rf connectivity-only && + git init connectivity-only && + ( + cd connectivity-only && + test_commit foo && + rm -f .git/index && + tree=$(git rev-parse HEAD^{tree}) && + remove_object $(git rev-parse HEAD:foo.t) && + test_must_fail git fsck --connectivity-only $tree + ) +' + +test_expect_success 'fsck --name-objects' ' + rm -rf name-objects && + git init name-objects && + ( + cd name-objects && + test_commit julius caesar.t && + test_commit augustus && + test_commit caesar && + remove_object $(git rev-parse julius:caesar.t) && + test_must_fail git fsck --name-objects >out && + tree=$(git rev-parse --verify julius:) && + test_i18ngrep -E "$tree \((refs/heads/master|HEAD)@\{[0-9]*\}:" out + ) +' + +test_expect_success 'alternate objects are correctly blamed' ' + test_when_finished "rm -rf alt.git .git/objects/info/alternates" && + name=$(test_oid numeric) && + path=$(test_oid_to_path "$name") && + git init --bare alt.git && + echo "../../alt.git/objects" >.git/objects/info/alternates && + mkdir alt.git/objects/$(dirname $path) && + >alt.git/objects/$(dirname $path)/$(basename $path) && + test_must_fail git fsck >out 2>&1 && + test_i18ngrep alt.git out +' + +test_expect_success 'fsck errors in packed objects' ' + git cat-file commit HEAD >basis && + sed "s/</one/" basis >one && + sed "s/</foo/" basis >two && + one=$(git hash-object -t commit -w one) && + two=$(git hash-object -t commit -w two) && + pack=$( + { + echo $one && + echo $two + } | git pack-objects .git/objects/pack/pack + ) && + test_when_finished "rm -f .git/objects/pack/pack-$pack.*" && + remove_object $one && + remove_object $two && + test_must_fail git fsck 2>out && + test_i18ngrep "error in commit $one.* - bad name" out && + test_i18ngrep "error in commit $two.* - bad name" out && + ! grep corrupt out +' + +test_expect_success 'fsck fails on corrupt packfile' ' + hsh=$(git commit-tree -m mycommit HEAD^{tree}) && + pack=$(echo $hsh | git pack-objects .git/objects/pack/pack) && + + # Corrupt the first byte of the first object. (It contains 3 type bits, + # at least one of which is not zero, so setting the first byte to 0 is + # sufficient.) + chmod a+w .git/objects/pack/pack-$pack.pack && + printf '\0' | dd of=.git/objects/pack/pack-$pack.pack bs=1 conv=notrunc seek=12 && + + test_when_finished "rm -f .git/objects/pack/pack-$pack.*" && + remove_object $hsh && + test_must_fail git fsck 2>out && + test_i18ngrep "checksum mismatch" out +' + +test_expect_success 'fsck finds problems in duplicate loose objects' ' + rm -rf broken-duplicate && + git init broken-duplicate && + ( + cd broken-duplicate && + test_commit duplicate && + # no "-d" here, so we end up with duplicates + git repack && + # now corrupt the loose copy + file=$(sha1_file "$(git rev-parse HEAD)") && + rm "$file" && + echo broken >"$file" && + test_must_fail git fsck + ) +' + +test_expect_success 'fsck detects trailing loose garbage (commit)' ' + git cat-file commit HEAD >basis && + echo bump-commit-sha1 >>basis && + commit=$(git hash-object -w -t commit basis) && + file=$(sha1_file $commit) && + test_when_finished "remove_object $commit" && + chmod +w "$file" && + echo garbage >>"$file" && + test_must_fail git fsck 2>out && + test_i18ngrep "garbage.*$commit" out +' + +test_expect_success 'fsck detects trailing loose garbage (large blob)' ' + blob=$(echo trailing | git hash-object -w --stdin) && + file=$(sha1_file $blob) && + test_when_finished "remove_object $blob" && + chmod +w "$file" && + echo garbage >>"$file" && + test_must_fail git -c core.bigfilethreshold=5 fsck 2>out && + test_i18ngrep "garbage.*$blob" out +' + +test_expect_success 'fsck detects truncated loose object' ' + # make it big enough that we know we will truncate in the data + # portion, not the header + test-tool genrandom truncate 4096 >file && + blob=$(git hash-object -w file) && + file=$(sha1_file $blob) && + test_when_finished "remove_object $blob" && + test_copy_bytes 1024 <"$file" >tmp && + rm "$file" && + mv -f tmp "$file" && + + # check both regular and streaming code paths + test_must_fail git fsck 2>out && + test_i18ngrep corrupt.*$blob out && + + test_must_fail git -c core.bigfilethreshold=128 fsck 2>out && + test_i18ngrep corrupt.*$blob out +' + +# for each of type, we have one version which is referenced by another object +# (and so while unreachable, not dangling), and another variant which really is +# dangling. +test_expect_success 'create dangling-object repository' ' + git init dangling && + ( + cd dangling && + blob=$(echo not-dangling | git hash-object -w --stdin) && + dblob=$(echo dangling | git hash-object -w --stdin) && + tree=$(printf "100644 blob %s\t%s\n" $blob one | git mktree) && + dtree=$(printf "100644 blob %s\t%s\n" $blob two | git mktree) && + commit=$(git commit-tree $tree) && + dcommit=$(git commit-tree -p $commit $tree) && + + cat >expect <<-EOF + dangling blob $dblob + dangling commit $dcommit + dangling tree $dtree + EOF + ) +' + +test_expect_success 'fsck notices dangling objects' ' + ( + cd dangling && + git fsck >actual && + # the output order is non-deterministic, as it comes from a hash + sort <actual >actual.sorted && + test_i18ncmp expect actual.sorted + ) +' + +test_expect_success 'fsck --connectivity-only notices dangling objects' ' + ( + cd dangling && + git fsck --connectivity-only >actual && + # the output order is non-deterministic, as it comes from a hash + sort <actual >actual.sorted && + test_i18ncmp expect actual.sorted + ) +' + +test_expect_success 'fsck $name notices bogus $name' ' + test_must_fail git fsck bogus && + test_must_fail git fsck $ZERO_OID +' + +test_expect_success 'bogus head does not fallback to all heads' ' + # set up a case that will cause a reachability complaint + echo to-be-deleted >foo && + git add foo && + blob=$(git rev-parse :foo) && + test_when_finished "git rm --cached foo" && + remove_object $blob && + test_must_fail git fsck $ZERO_OID >out 2>&1 && + ! grep $blob out +' + +# Corrupt the checksum on the index. +# Add 1 to the last byte in the SHA. +corrupt_index_checksum () { + perl -w -e ' + use Fcntl ":seek"; + open my $fh, "+<", ".git/index" or die "open: $!"; + binmode $fh; + seek $fh, -1, SEEK_END or die "seek: $!"; + read $fh, my $in_byte, 1 or die "read: $!"; + + $in_value = unpack("C", $in_byte); + $out_value = ($in_value + 1) & 255; + + $out_byte = pack("C", $out_value); + + seek $fh, -1, SEEK_END or die "seek: $!"; + print $fh $out_byte; + close $fh or die "close: $!"; + ' +} + +# Corrupt the checksum on the index and then +# verify that only fsck notices. +test_expect_success 'detect corrupt index file in fsck' ' + cp .git/index .git/index.backup && + test_when_finished "mv .git/index.backup .git/index" && + corrupt_index_checksum && + test_must_fail git fsck --cache 2>errors && + test_i18ngrep "bad index file" errors +' + +test_done |