t/t1450-fsck.sh

   1 #!/bin/sh
   2
   3 test_description='git fsck random collection of tests
   4
   5 * (HEAD) B
   6 * (master) A
   7 '
   8
   9 . ./test-lib.sh
  10
  11 test_expect_success setup '
  12         test_oid_init &&
  13         git config gc.auto 0 &&
  14         git config i18n.commitencoding ISO-8859-1 &&
  15         test_commit A fileA one &&
  16         git config --unset i18n.commitencoding &&
  17         git checkout HEAD^0 &&
  18         test_commit B fileB two &&
  19         git tag -d A B &&
  20         git reflog expire --expire=now --all
  21 '
  22
  23 test_expect_success 'loose objects borrowed from alternate are not missing' '
  24         mkdir another &&
  25         (
  26                 cd another &&
  27                 git init &&
  28                 echo ../../../.git/objects >.git/objects/info/alternates &&
  29                 test_commit C fileC one &&
  30                 git fsck --no-dangling >../actual 2>&1
  31         ) &&
  32         test_must_be_empty actual
  33 '
  34
  35 test_expect_success 'HEAD is part of refs, valid objects appear valid' '
  36         git fsck >actual 2>&1 &&
  37         test_must_be_empty actual
  38 '
  39
  40 # Corruption tests follow.  Make sure to remove all traces of the
  41 # specific corruption you test afterwards, lest a later test trip over
  42 # it.
  43
  44 test_expect_success 'setup: helpers for corruption tests' '
  45         sha1_file() {
  46                 remainder=${1#??} &&
  47                 firsttwo=${1%$remainder} &&
  48                 echo ".git/objects/$firsttwo/$remainder"
  49         } &&
  50
  51         remove_object() {
  52                 rm "$(sha1_file "$1")"
  53         }
  54 '
  55
  56 test_expect_success 'object with bad sha1' '
  57         sha=$(echo blob | git hash-object -w --stdin) &&
  58         old=$(test_oid_to_path "$sha") &&
  59         new=$(dirname $old)/$(test_oid ff_2) &&
  60         sha="$(dirname $new)$(basename $new)" &&
  61         mv .git/objects/$old .git/objects/$new &&
  62         test_when_finished "remove_object $sha" &&
  63         git update-index --add --cacheinfo 100644 $sha foo &&
  64         test_when_finished "git read-tree -u --reset HEAD" &&
  65         tree=$(git write-tree) &&
  66         test_when_finished "remove_object $tree" &&
  67         cmt=$(echo bogus | git commit-tree $tree) &&
  68         test_when_finished "remove_object $cmt" &&
  69         git update-ref refs/heads/bogus $cmt &&
  70         test_when_finished "git update-ref -d refs/heads/bogus" &&
  71
  72         test_must_fail git fsck 2>out &&
  73         test_i18ngrep "$sha.*corrupt" out
  74 '
  75
  76 test_expect_success 'branch pointing to non-commit' '
  77         git rev-parse HEAD^{tree} >.git/refs/heads/invalid &&
  78         test_when_finished "git update-ref -d refs/heads/invalid" &&
  79         test_must_fail git fsck 2>out &&
  80         test_i18ngrep "not a commit" out
  81 '
  82
  83 test_expect_success 'HEAD link pointing at a funny object' '
  84         test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  85         mv .git/HEAD .git/SAVED_HEAD &&
  86         echo $ZERO_OID >.git/HEAD &&
  87         # avoid corrupt/broken HEAD from interfering with repo discovery
  88         test_must_fail env GIT_DIR=.git git fsck 2>out &&
  89         test_i18ngrep "detached HEAD points" out
  90 '
  91
  92 test_expect_success 'HEAD link pointing at a funny place' '
  93         test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  94         mv .git/HEAD .git/SAVED_HEAD &&
  95         echo "ref: refs/funny/place" >.git/HEAD &&
  96         # avoid corrupt/broken HEAD from interfering with repo discovery
  97         test_must_fail env GIT_DIR=.git git fsck 2>out &&
  98         test_i18ngrep "HEAD points to something strange" out
  99 '
 100
 101 test_expect_success 'HEAD link pointing at a funny object (from different wt)' '
 102         test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
 103         test_when_finished "rm -rf .git/worktrees wt" &&
 104         git worktree add wt &&
 105         mv .git/HEAD .git/SAVED_HEAD &&
 106         echo $ZERO_OID >.git/HEAD &&
 107         # avoid corrupt/broken HEAD from interfering with repo discovery
 108         test_must_fail git -C wt fsck 2>out &&
 109         test_i18ngrep "main-worktree/HEAD: detached HEAD points" out
 110 '
 111
 112 test_expect_success 'other worktree HEAD link pointing at a funny object' '
 113         test_when_finished "rm -rf .git/worktrees other" &&
 114         git worktree add other &&
 115         echo $ZERO_OID >.git/worktrees/other/HEAD &&
 116         test_must_fail git fsck 2>out &&
 117         test_i18ngrep "worktrees/other/HEAD: detached HEAD points" out
 118 '
 119
 120 test_expect_success 'other worktree HEAD link pointing at missing object' '
 121         test_when_finished "rm -rf .git/worktrees other" &&
 122         git worktree add other &&
 123         echo "Contents missing from repo" | git hash-object --stdin >.git/worktrees/other/HEAD &&
 124         test_must_fail git fsck 2>out &&
 125         test_i18ngrep "worktrees/other/HEAD: invalid sha1 pointer" out
 126 '
 127
 128 test_expect_success 'other worktree HEAD link pointing at a funny place' '
 129         test_when_finished "rm -rf .git/worktrees other" &&
 130         git worktree add other &&
 131         echo "ref: refs/funny/place" >.git/worktrees/other/HEAD &&
 132         test_must_fail git fsck 2>out &&
 133         test_i18ngrep "worktrees/other/HEAD points to something strange" out
 134 '
 135
 136 test_expect_success 'email without @ is okay' '
 137         git cat-file commit HEAD >basis &&
 138         sed "s/@/AT/" basis >okay &&
 139         new=$(git hash-object -t commit -w --stdin <okay) &&
 140         test_when_finished "remove_object $new" &&
 141         git update-ref refs/heads/bogus "$new" &&
 142         test_when_finished "git update-ref -d refs/heads/bogus" &&
 143         git fsck 2>out &&
 144         cat out &&
 145         ! grep "commit $new" out
 146 '
 147
 148 test_expect_success 'email with embedded > is not okay' '
 149         git cat-file commit HEAD >basis &&
 150         sed "s/@[a-z]/&>/" basis >bad-email &&
 151         new=$(git hash-object -t commit -w --stdin <bad-email) &&
 152         test_when_finished "remove_object $new" &&
 153         git update-ref refs/heads/bogus "$new" &&
 154         test_when_finished "git update-ref -d refs/heads/bogus" &&
 155         test_must_fail git fsck 2>out &&
 156         test_i18ngrep "error in commit $new" out
 157 '
 158
 159 test_expect_success 'missing < email delimiter is reported nicely' '
 160         git cat-file commit HEAD >basis &&
 161         sed "s/<//" basis >bad-email-2 &&
 162         new=$(git hash-object -t commit -w --stdin <bad-email-2) &&
 163         test_when_finished "remove_object $new" &&
 164         git update-ref refs/heads/bogus "$new" &&
 165         test_when_finished "git update-ref -d refs/heads/bogus" &&
 166         test_must_fail git fsck 2>out &&
 167         test_i18ngrep "error in commit $new.* - bad name" out
 168 '
 169
 170 test_expect_success 'missing email is reported nicely' '
 171         git cat-file commit HEAD >basis &&
 172         sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 &&
 173         new=$(git hash-object -t commit -w --stdin <bad-email-3) &&
 174         test_when_finished "remove_object $new" &&
 175         git update-ref refs/heads/bogus "$new" &&
 176         test_when_finished "git update-ref -d refs/heads/bogus" &&
 177         test_must_fail git fsck 2>out &&
 178         test_i18ngrep "error in commit $new.* - missing email" out
 179 '
 180
 181 test_expect_success '> in name is reported' '
 182         git cat-file commit HEAD >basis &&
 183         sed "s/ </> </" basis >bad-email-4 &&
 184         new=$(git hash-object -t commit -w --stdin <bad-email-4) &&
 185         test_when_finished "remove_object $new" &&
 186         git update-ref refs/heads/bogus "$new" &&
 187         test_when_finished "git update-ref -d refs/heads/bogus" &&
 188         test_must_fail git fsck 2>out &&
 189         test_i18ngrep "error in commit $new" out
 190 '
 191
 192 # date is 2^64 + 1
 193 test_expect_success 'integer overflow in timestamps is reported' '
 194         git cat-file commit HEAD >basis &&
 195         sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \
 196                 <basis >bad-timestamp &&
 197         new=$(git hash-object -t commit -w --stdin <bad-timestamp) &&
 198         test_when_finished "remove_object $new" &&
 199         git update-ref refs/heads/bogus "$new" &&
 200         test_when_finished "git update-ref -d refs/heads/bogus" &&
 201         test_must_fail git fsck 2>out &&
 202         test_i18ngrep "error in commit $new.*integer overflow" out
 203 '
 204
 205 test_expect_success 'commit with NUL in header' '
 206         git cat-file commit HEAD >basis &&
 207         sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header &&
 208         new=$(git hash-object -t commit -w --stdin <commit-NUL-header) &&
 209         test_when_finished "remove_object $new" &&
 210         git update-ref refs/heads/bogus "$new" &&
 211         test_when_finished "git update-ref -d refs/heads/bogus" &&
 212         test_must_fail git fsck 2>out &&
 213         test_i18ngrep "error in commit $new.*unterminated header: NUL at offset" out
 214 '
 215
 216 test_expect_success 'tree object with duplicate entries' '
 217         test_when_finished "for i in \$T; do remove_object \$i; done" &&
 218         T=$(
 219                 GIT_INDEX_FILE=test-index &&
 220                 export GIT_INDEX_FILE &&
 221                 rm -f test-index &&
 222                 >x &&
 223                 git add x &&
 224                 git rev-parse :x &&
 225                 T=$(git write-tree) &&
 226                 echo $T &&
 227                 (
 228                         git cat-file tree $T &&
 229                         git cat-file tree $T
 230                 ) |
 231                 git hash-object -w -t tree --stdin
 232         ) &&
 233         test_must_fail git fsck 2>out &&
 234         test_i18ngrep "error in tree .*contains duplicate file entries" out
 235 '
 236
 237 test_expect_success 'unparseable tree object' '
 238         test_oid_cache <<-\EOF &&
 239         junk sha1:twenty-bytes-of-junk
 240         junk sha256:twenty-bytes-of-junk-twelve-more
 241         EOF
 242
 243         test_when_finished "git update-ref -d refs/heads/wrong" &&
 244         test_when_finished "remove_object \$tree_sha1" &&
 245         test_when_finished "remove_object \$commit_sha1" &&
 246         junk=$(test_oid junk) &&
 247         tree_sha1=$(printf "100644 \0$junk" | git hash-object -t tree --stdin -w --literally) &&
 248         commit_sha1=$(git commit-tree $tree_sha1) &&
 249         git update-ref refs/heads/wrong $commit_sha1 &&
 250         test_must_fail git fsck 2>out &&
 251         test_i18ngrep "error: empty filename in tree entry" out &&
 252         test_i18ngrep "$tree_sha1" out &&
 253         test_i18ngrep ! "fatal: empty filename in tree entry" out
 254 '
 255
 256 test_expect_success 'tree entry with type mismatch' '
 257         test_when_finished "remove_object \$blob" &&
 258         test_when_finished "remove_object \$tree" &&
 259         test_when_finished "remove_object \$commit" &&
 260         test_when_finished "git update-ref -d refs/heads/type_mismatch" &&
 261         blob=$(echo blob | git hash-object -w --stdin) &&
 262         blob_bin=$(echo $blob | hex2oct) &&
 263         tree=$(
 264                 printf "40000 dir\0${blob_bin}100644 file\0${blob_bin}" |
 265                 git hash-object -t tree --stdin -w --literally
 266         ) &&
 267         commit=$(git commit-tree $tree) &&
 268         git update-ref refs/heads/type_mismatch $commit &&
 269         test_must_fail git fsck >out 2>&1 &&
 270         test_i18ngrep "is a blob, not a tree" out &&
 271         test_i18ngrep ! "dangling blob" out
 272 '
 273
 274 test_expect_success 'tag pointing to nonexistent' '
 275         badoid=$(test_oid deadbeef) &&
 276         cat >invalid-tag <<-EOF &&
 277         object $badoid
 278         type commit
 279         tag invalid
 280         tagger T A Gger <tagger@example.com> 1234567890 -0000
 281
 282         This is an invalid tag.
 283         EOF
 284
 285         tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
 286         test_when_finished "remove_object $tag" &&
 287         echo $tag >.git/refs/tags/invalid &&
 288         test_when_finished "git update-ref -d refs/tags/invalid" &&
 289         test_must_fail git fsck --tags >out &&
 290         test_i18ngrep "broken link" out
 291 '
 292
 293 test_expect_success 'tag pointing to something else than its type' '
 294         sha=$(echo blob | git hash-object -w --stdin) &&
 295         test_when_finished "remove_object $sha" &&
 296         cat >wrong-tag <<-EOF &&
 297         object $sha
 298         type commit
 299         tag wrong
 300         tagger T A Gger <tagger@example.com> 1234567890 -0000
 301
 302         This is an invalid tag.
 303         EOF
 304
 305         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 306         test_when_finished "remove_object $tag" &&
 307         echo $tag >.git/refs/tags/wrong &&
 308         test_when_finished "git update-ref -d refs/tags/wrong" &&
 309         test_must_fail git fsck --tags
 310 '
 311
 312 test_expect_success 'tag with incorrect tag name & missing tagger' '
 313         sha=$(git rev-parse HEAD) &&
 314         cat >wrong-tag <<-EOF &&
 315         object $sha
 316         type commit
 317         tag wrong name format
 318
 319         This is an invalid tag.
 320         EOF
 321
 322         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 323         test_when_finished "remove_object $tag" &&
 324         echo $tag >.git/refs/tags/wrong &&
 325         test_when_finished "git update-ref -d refs/tags/wrong" &&
 326         git fsck --tags 2>out &&
 327
 328         cat >expect <<-EOF &&
 329         warning in tag $tag: badTagName: invalid '\''tag'\'' name: wrong name format
 330         warning in tag $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line
 331         EOF
 332         test_i18ncmp expect out
 333 '
 334
 335 test_expect_success 'tag with bad tagger' '
 336         sha=$(git rev-parse HEAD) &&
 337         cat >wrong-tag <<-EOF &&
 338         object $sha
 339         type commit
 340         tag not-quite-wrong
 341         tagger Bad Tagger Name
 342
 343         This is an invalid tag.
 344         EOF
 345
 346         tag=$(git hash-object --literally -t tag -w --stdin <wrong-tag) &&
 347         test_when_finished "remove_object $tag" &&
 348         echo $tag >.git/refs/tags/wrong &&
 349         test_when_finished "git update-ref -d refs/tags/wrong" &&
 350         test_must_fail git fsck --tags 2>out &&
 351         test_i18ngrep "error in tag .*: invalid author/committer" out
 352 '
 353
 354 test_expect_success 'tag with NUL in header' '
 355         sha=$(git rev-parse HEAD) &&
 356         q_to_nul >tag-NUL-header <<-EOF &&
 357         object $sha
 358         type commit
 359         tag contains-Q-in-header
 360         tagger T A Gger <tagger@example.com> 1234567890 -0000
 361
 362         This is an invalid tag.
 363         EOF
 364
 365         tag=$(git hash-object --literally -t tag -w --stdin <tag-NUL-header) &&
 366         test_when_finished "remove_object $tag" &&
 367         echo $tag >.git/refs/tags/wrong &&
 368         test_when_finished "git update-ref -d refs/tags/wrong" &&
 369         test_must_fail git fsck --tags 2>out &&
 370         test_i18ngrep "error in tag $tag.*unterminated header: NUL at offset" out
 371 '
 372
 373 test_expect_success 'cleaned up' '
 374         git fsck >actual 2>&1 &&
 375         test_must_be_empty actual
 376 '
 377
 378 test_expect_success 'rev-list --verify-objects' '
 379         git rev-list --verify-objects --all >/dev/null 2>out &&
 380         test_must_be_empty out
 381 '
 382
 383 test_expect_success 'rev-list --verify-objects with bad sha1' '
 384         sha=$(echo blob | git hash-object -w --stdin) &&
 385         old=$(test_oid_to_path $sha) &&
 386         new=$(dirname $old)/$(test_oid ff_2) &&
 387         sha="$(dirname $new)$(basename $new)" &&
 388         mv .git/objects/$old .git/objects/$new &&
 389         test_when_finished "remove_object $sha" &&
 390         git update-index --add --cacheinfo 100644 $sha foo &&
 391         test_when_finished "git read-tree -u --reset HEAD" &&
 392         tree=$(git write-tree) &&
 393         test_when_finished "remove_object $tree" &&
 394         cmt=$(echo bogus | git commit-tree $tree) &&
 395         test_when_finished "remove_object $cmt" &&
 396         git update-ref refs/heads/bogus $cmt &&
 397         test_when_finished "git update-ref -d refs/heads/bogus" &&
 398
 399         test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 400         test_i18ngrep -q "error: hash mismatch $(dirname $new)$(test_oid ff_2)" out
 401 '
 402
 403 test_expect_success 'force fsck to ignore double author' '
 404         git cat-file commit HEAD >basis &&
 405         sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors &&
 406         new=$(git hash-object -t commit -w --stdin <multiple-authors) &&
 407         test_when_finished "remove_object $new" &&
 408         git update-ref refs/heads/bogus "$new" &&
 409         test_when_finished "git update-ref -d refs/heads/bogus" &&
 410         test_must_fail git fsck &&
 411         git -c fsck.multipleAuthors=ignore fsck
 412 '
 413
 414 _bz='\0'
 415 _bzoid=$(printf $ZERO_OID | sed -e 's/00/\\0/g')
 416
 417 test_expect_success 'fsck notices blob entry pointing to null sha1' '
 418         (git init null-blob &&
 419          cd null-blob &&
 420          sha=$(printf "100644 file$_bz$_bzoid" |
 421                git hash-object -w --stdin -t tree) &&
 422           git fsck 2>out &&
 423           test_i18ngrep "warning.*null sha1" out
 424         )
 425 '
 426
 427 test_expect_success 'fsck notices submodule entry pointing to null sha1' '
 428         (git init null-commit &&
 429          cd null-commit &&
 430          sha=$(printf "160000 submodule$_bz$_bzoid" |
 431                git hash-object -w --stdin -t tree) &&
 432           git fsck 2>out &&
 433           test_i18ngrep "warning.*null sha1" out
 434         )
 435 '
 436
 437 while read name path pretty; do
 438         while read mode type; do
 439                 : ${pretty:=$path}
 440                 test_expect_success "fsck notices $pretty as $type" '
 441                 (
 442                         git init $name-$type &&
 443                         cd $name-$type &&
 444                         echo content >file &&
 445                         git add file &&
 446                         git commit -m base &&
 447                         blob=$(git rev-parse :file) &&
 448                         tree=$(git rev-parse HEAD^{tree}) &&
 449                         value=$(eval "echo \$$type") &&
 450                         printf "$mode $type %s\t%s" "$value" "$path" >bad &&
 451                         bad_tree=$(git mktree <bad) &&
 452                         git fsck 2>out &&
 453                         test_i18ngrep "warning.*tree $bad_tree" out
 454                 )'
 455         done <<-\EOF
 456         100644 blob
 457         040000 tree
 458         EOF
 459 done <<-EOF
 460 dot .
 461 dotdot ..
 462 dotgit .git
 463 dotgit-case .GIT
 464 dotgit-unicode .gI${u200c}T .gI{u200c}T
 465 dotgit-case2 .Git
 466 git-tilde1 git~1
 467 dotgitdot .git.
 468 dot-backslash-case .\\\\.GIT\\\\foobar
 469 dotgit-case-backslash .git\\\\foobar
 470 EOF
 471
 472 test_expect_success 'fsck allows .Ňit' '
 473         (
 474                 git init not-dotgit &&
 475                 cd not-dotgit &&
 476                 echo content >file &&
 477                 git add file &&
 478                 git commit -m base &&
 479                 blob=$(git rev-parse :file) &&
 480                 printf "100644 blob $blob\t.\\305\\207it" >tree &&
 481                 tree=$(git mktree <tree) &&
 482                 git fsck 2>err &&
 483                 test_line_count = 0 err
 484         )
 485 '
 486
 487 test_expect_success 'NUL in commit' '
 488         rm -fr nul-in-commit &&
 489         git init nul-in-commit &&
 490         (
 491                 cd nul-in-commit &&
 492                 git commit --allow-empty -m "initial commitQNUL after message" &&
 493                 git cat-file commit HEAD >original &&
 494                 q_to_nul <original >munged &&
 495                 git hash-object -w -t commit --stdin <munged >name &&
 496                 git branch bad $(cat name) &&
 497
 498                 test_must_fail git -c fsck.nulInCommit=error fsck 2>warn.1 &&
 499                 test_i18ngrep nulInCommit warn.1 &&
 500                 git fsck 2>warn.2 &&
 501                 test_i18ngrep nulInCommit warn.2
 502         )
 503 '
 504
 505 # create a static test repo which is broken by omitting
 506 # one particular object ($1, which is looked up via rev-parse
 507 # in the new repository).
 508 create_repo_missing () {
 509         rm -rf missing &&
 510         git init missing &&
 511         (
 512                 cd missing &&
 513                 git commit -m one --allow-empty &&
 514                 mkdir subdir &&
 515                 echo content >subdir/file &&
 516                 git add subdir/file &&
 517                 git commit -m two &&
 518                 unrelated=$(echo unrelated | git hash-object --stdin -w) &&
 519                 git tag -m foo tag $unrelated &&
 520                 sha1=$(git rev-parse --verify "$1") &&
 521                 path=$(echo $sha1 | sed 's|..|&/|') &&
 522                 rm .git/objects/$path
 523         )
 524 }
 525
 526 test_expect_success 'fsck notices missing blob' '
 527         create_repo_missing HEAD:subdir/file &&
 528         test_must_fail git -C missing fsck
 529 '
 530
 531 test_expect_success 'fsck notices missing subtree' '
 532         create_repo_missing HEAD:subdir &&
 533         test_must_fail git -C missing fsck
 534 '
 535
 536 test_expect_success 'fsck notices missing root tree' '
 537         create_repo_missing HEAD^{tree} &&
 538         test_must_fail git -C missing fsck
 539 '
 540
 541 test_expect_success 'fsck notices missing parent' '
 542         create_repo_missing HEAD^ &&
 543         test_must_fail git -C missing fsck
 544 '
 545
 546 test_expect_success 'fsck notices missing tagged object' '
 547         create_repo_missing tag^{blob} &&
 548         test_must_fail git -C missing fsck
 549 '
 550
 551 test_expect_success 'fsck notices ref pointing to missing commit' '
 552         create_repo_missing HEAD &&
 553         test_must_fail git -C missing fsck
 554 '
 555
 556 test_expect_success 'fsck notices ref pointing to missing tag' '
 557         create_repo_missing tag &&
 558         test_must_fail git -C missing fsck
 559 '
 560
 561 test_expect_success 'fsck --connectivity-only' '
 562         rm -rf connectivity-only &&
 563         git init connectivity-only &&
 564         (
 565                 cd connectivity-only &&
 566                 touch empty &&
 567                 git add empty &&
 568                 test_commit empty &&
 569
 570                 # Drop the index now; we want to be sure that we
 571                 # recursively notice the broken objects
 572                 # because they are reachable from refs, not because
 573                 # they are in the index.
 574                 rm -f .git/index &&
 575
 576                 # corrupt the blob, but in a way that we can still identify
 577                 # its type. That lets us see that --connectivity-only is
 578                 # not actually looking at the contents, but leaves it
 579                 # free to examine the type if it chooses.
 580                 empty=.git/objects/$(test_oid_to_path $EMPTY_BLOB) &&
 581                 blob=$(echo unrelated | git hash-object -w --stdin) &&
 582                 mv -f $(sha1_file $blob) $empty &&
 583
 584                 test_must_fail git fsck --strict &&
 585                 git fsck --strict --connectivity-only &&
 586                 tree=$(git rev-parse HEAD:) &&
 587                 suffix=${tree#??} &&
 588                 tree=.git/objects/${tree%$suffix}/$suffix &&
 589                 rm -f $tree &&
 590                 echo invalid >$tree &&
 591                 test_must_fail git fsck --strict --connectivity-only
 592         )
 593 '
 594
 595 test_expect_success 'fsck --connectivity-only with explicit head' '
 596         rm -rf connectivity-only &&
 597         git init connectivity-only &&
 598         (
 599                 cd connectivity-only &&
 600                 test_commit foo &&
 601                 rm -f .git/index &&
 602                 tree=$(git rev-parse HEAD^{tree}) &&
 603                 remove_object $(git rev-parse HEAD:foo.t) &&
 604                 test_must_fail git fsck --connectivity-only $tree
 605         )
 606 '
 607
 608 test_expect_success 'fsck --name-objects' '
 609         rm -rf name-objects &&
 610         git init name-objects &&
 611         (
 612                 cd name-objects &&
 613                 test_commit julius caesar.t &&
 614                 test_commit augustus &&
 615                 test_commit caesar &&
 616                 remove_object $(git rev-parse julius:caesar.t) &&
 617                 test_must_fail git fsck --name-objects >out &&
 618                 tree=$(git rev-parse --verify julius:) &&
 619                 test_i18ngrep -E "$tree \((refs/heads/master|HEAD)@\{[0-9]*\}:" out
 620         )
 621 '
 622
 623 test_expect_success 'alternate objects are correctly blamed' '
 624         test_when_finished "rm -rf alt.git .git/objects/info/alternates" &&
 625         name=$(test_oid numeric) &&
 626         path=$(test_oid_to_path "$name") &&
 627         git init --bare alt.git &&
 628         echo "../../alt.git/objects" >.git/objects/info/alternates &&
 629         mkdir alt.git/objects/$(dirname $path) &&
 630         >alt.git/objects/$(dirname $path)/$(basename $path) &&
 631         test_must_fail git fsck >out 2>&1 &&
 632         test_i18ngrep alt.git out
 633 '
 634
 635 test_expect_success 'fsck errors in packed objects' '
 636         git cat-file commit HEAD >basis &&
 637         sed "s/</one/" basis >one &&
 638         sed "s/</foo/" basis >two &&
 639         one=$(git hash-object -t commit -w one) &&
 640         two=$(git hash-object -t commit -w two) &&
 641         pack=$(
 642                 {
 643                         echo $one &&
 644                         echo $two
 645                 } | git pack-objects .git/objects/pack/pack
 646         ) &&
 647         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 648         remove_object $one &&
 649         remove_object $two &&
 650         test_must_fail git fsck 2>out &&
 651         test_i18ngrep "error in commit $one.* - bad name" out &&
 652         test_i18ngrep "error in commit $two.* - bad name" out &&
 653         ! grep corrupt out
 654 '
 655
 656 test_expect_success 'fsck fails on corrupt packfile' '
 657         hsh=$(git commit-tree -m mycommit HEAD^{tree}) &&
 658         pack=$(echo $hsh | git pack-objects .git/objects/pack/pack) &&
 659
 660         # Corrupt the first byte of the first object. (It contains 3 type bits,
 661         # at least one of which is not zero, so setting the first byte to 0 is
 662         # sufficient.)
 663         chmod a+w .git/objects/pack/pack-$pack.pack &&
 664         printf '\0' | dd of=.git/objects/pack/pack-$pack.pack bs=1 conv=notrunc seek=12 &&
 665
 666         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 667         remove_object $hsh &&
 668         test_must_fail git fsck 2>out &&
 669         test_i18ngrep "checksum mismatch" out
 670 '
 671
 672 test_expect_success 'fsck finds problems in duplicate loose objects' '
 673         rm -rf broken-duplicate &&
 674         git init broken-duplicate &&
 675         (
 676                 cd broken-duplicate &&
 677                 test_commit duplicate &&
 678                 # no "-d" here, so we end up with duplicates
 679                 git repack &&
 680                 # now corrupt the loose copy
 681                 file=$(sha1_file "$(git rev-parse HEAD)") &&
 682                 rm "$file" &&
 683                 echo broken >"$file" &&
 684                 test_must_fail git fsck
 685         )
 686 '
 687
 688 test_expect_success 'fsck detects trailing loose garbage (commit)' '
 689         git cat-file commit HEAD >basis &&
 690         echo bump-commit-sha1 >>basis &&
 691         commit=$(git hash-object -w -t commit basis) &&
 692         file=$(sha1_file $commit) &&
 693         test_when_finished "remove_object $commit" &&
 694         chmod +w "$file" &&
 695         echo garbage >>"$file" &&
 696         test_must_fail git fsck 2>out &&
 697         test_i18ngrep "garbage.*$commit" out
 698 '
 699
 700 test_expect_success 'fsck detects trailing loose garbage (large blob)' '
 701         blob=$(echo trailing | git hash-object -w --stdin) &&
 702         file=$(sha1_file $blob) &&
 703         test_when_finished "remove_object $blob" &&
 704         chmod +w "$file" &&
 705         echo garbage >>"$file" &&
 706         test_must_fail git -c core.bigfilethreshold=5 fsck 2>out &&
 707         test_i18ngrep "garbage.*$blob" out
 708 '
 709
 710 test_expect_success 'fsck detects truncated loose object' '
 711         # make it big enough that we know we will truncate in the data
 712         # portion, not the header
 713         test-tool genrandom truncate 4096 >file &&
 714         blob=$(git hash-object -w file) &&
 715         file=$(sha1_file $blob) &&
 716         test_when_finished "remove_object $blob" &&
 717         test_copy_bytes 1024 <"$file" >tmp &&
 718         rm "$file" &&
 719         mv -f tmp "$file" &&
 720
 721         # check both regular and streaming code paths
 722         test_must_fail git fsck 2>out &&
 723         test_i18ngrep corrupt.*$blob out &&
 724
 725         test_must_fail git -c core.bigfilethreshold=128 fsck 2>out &&
 726         test_i18ngrep corrupt.*$blob out
 727 '
 728
 729 # for each of type, we have one version which is referenced by another object
 730 # (and so while unreachable, not dangling), and another variant which really is
 731 # dangling.
 732 test_expect_success 'create dangling-object repository' '
 733         git init dangling &&
 734         (
 735                 cd dangling &&
 736                 blob=$(echo not-dangling | git hash-object -w --stdin) &&
 737                 dblob=$(echo dangling | git hash-object -w --stdin) &&
 738                 tree=$(printf "100644 blob %s\t%s\n" $blob one | git mktree) &&
 739                 dtree=$(printf "100644 blob %s\t%s\n" $blob two | git mktree) &&
 740                 commit=$(git commit-tree $tree) &&
 741                 dcommit=$(git commit-tree -p $commit $tree) &&
 742
 743                 cat >expect <<-EOF
 744                 dangling blob $dblob
 745                 dangling commit $dcommit
 746                 dangling tree $dtree
 747                 EOF
 748         )
 749 '
 750
 751 test_expect_success 'fsck notices dangling objects' '
 752         (
 753                 cd dangling &&
 754                 git fsck >actual &&
 755                 # the output order is non-deterministic, as it comes from a hash
 756                 sort <actual >actual.sorted &&
 757                 test_i18ncmp expect actual.sorted
 758         )
 759 '
 760
 761 test_expect_success 'fsck --connectivity-only notices dangling objects' '
 762         (
 763                 cd dangling &&
 764                 git fsck --connectivity-only >actual &&
 765                 # the output order is non-deterministic, as it comes from a hash
 766                 sort <actual >actual.sorted &&
 767                 test_i18ncmp expect actual.sorted
 768         )
 769 '
 770
 771 test_expect_success 'fsck $name notices bogus $name' '
 772         test_must_fail git fsck bogus &&
 773         test_must_fail git fsck $ZERO_OID
 774 '
 775
 776 test_expect_success 'bogus head does not fallback to all heads' '
 777         # set up a case that will cause a reachability complaint
 778         echo to-be-deleted >foo &&
 779         git add foo &&
 780         blob=$(git rev-parse :foo) &&
 781         test_when_finished "git rm --cached foo" &&
 782         remove_object $blob &&
 783         test_must_fail git fsck $ZERO_OID >out 2>&1 &&
 784         ! grep $blob out
 785 '
 786
 787 # Corrupt the checksum on the index.
 788 # Add 1 to the last byte in the SHA.
 789 corrupt_index_checksum () {
 790     perl -w -e '
 791         use Fcntl ":seek";
 792         open my $fh, "+<", ".git/index" or die "open: $!";
 793         binmode $fh;
 794         seek $fh, -1, SEEK_END or die "seek: $!";
 795         read $fh, my $in_byte, 1 or die "read: $!";
 796
 797         $in_value = unpack("C", $in_byte);
 798         $out_value = ($in_value + 1) & 255;
 799
 800         $out_byte = pack("C", $out_value);
 801
 802         seek $fh, -1, SEEK_END or die "seek: $!";
 803         print $fh $out_byte;
 804         close $fh or die "close: $!";
 805     '
 806 }
 807
 808 # Corrupt the checksum on the index and then
 809 # verify that only fsck notices.
 810 test_expect_success 'detect corrupt index file in fsck' '
 811         cp .git/index .git/index.backup &&
 812         test_when_finished "mv .git/index.backup .git/index" &&
 813         corrupt_index_checksum &&
 814         test_must_fail git fsck --cache 2>errors &&
 815         test_i18ngrep "bad index file" errors
 816 '
 817
 818 test_done