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         git config gc.auto 0 &&
  13         git config i18n.commitencoding ISO-8859-1 &&
  14         test_commit A fileA one &&
  15         git config --unset i18n.commitencoding &&
  16         git checkout HEAD^0 &&
  17         test_commit B fileB two &&
  18         git tag -d A B &&
  19         git reflog expire --expire=now --all &&
  20         >empty
  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_cmp 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_cmp 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=$(echo $sha | sed "s+^..+&/+") &&
  59         new=$(dirname $old)/ffffffffffffffffffffffffffffffffffffff &&
  60         sha="$(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 $cmt &&
  70         test_when_finished "git update-ref -d refs/heads/bogus" &&
  71
  72         test_must_fail git fsck 2>out &&
  73         cat out &&
  74         grep "$sha.*corrupt" out
  75 '
  76
  77 test_expect_success 'branch pointing to non-commit' '
  78         git rev-parse HEAD^{tree} >.git/refs/heads/invalid &&
  79         test_when_finished "git update-ref -d refs/heads/invalid" &&
  80         test_must_fail git fsck 2>out &&
  81         cat out &&
  82         grep "not a commit" out
  83 '
  84
  85 test_expect_success 'HEAD link pointing at a funny object' '
  86         test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  87         mv .git/HEAD .git/SAVED_HEAD &&
  88         echo 0000000000000000000000000000000000000000 >.git/HEAD &&
  89         # avoid corrupt/broken HEAD from interfering with repo discovery
  90         test_must_fail env GIT_DIR=.git git fsck 2>out &&
  91         cat out &&
  92         grep "detached HEAD points" out
  93 '
  94
  95 test_expect_success 'HEAD link pointing at a funny place' '
  96         test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  97         mv .git/HEAD .git/SAVED_HEAD &&
  98         echo "ref: refs/funny/place" >.git/HEAD &&
  99         # avoid corrupt/broken HEAD from interfering with repo discovery
 100         test_must_fail env GIT_DIR=.git git fsck 2>out &&
 101         cat out &&
 102         grep "HEAD points to something strange" out
 103 '
 104
 105 test_expect_success 'email without @ is okay' '
 106         git cat-file commit HEAD >basis &&
 107         sed "s/@/AT/" basis >okay &&
 108         new=$(git hash-object -t commit -w --stdin <okay) &&
 109         test_when_finished "remove_object $new" &&
 110         git update-ref refs/heads/bogus "$new" &&
 111         test_when_finished "git update-ref -d refs/heads/bogus" &&
 112         git fsck 2>out &&
 113         cat out &&
 114         ! grep "commit $new" out
 115 '
 116
 117 test_expect_success 'email with embedded > is not okay' '
 118         git cat-file commit HEAD >basis &&
 119         sed "s/@[a-z]/&>/" basis >bad-email &&
 120         new=$(git hash-object -t commit -w --stdin <bad-email) &&
 121         test_when_finished "remove_object $new" &&
 122         git update-ref refs/heads/bogus "$new" &&
 123         test_when_finished "git update-ref -d refs/heads/bogus" &&
 124         test_must_fail git fsck 2>out &&
 125         cat out &&
 126         grep "error in commit $new" out
 127 '
 128
 129 test_expect_success 'missing < email delimiter is reported nicely' '
 130         git cat-file commit HEAD >basis &&
 131         sed "s/<//" basis >bad-email-2 &&
 132         new=$(git hash-object -t commit -w --stdin <bad-email-2) &&
 133         test_when_finished "remove_object $new" &&
 134         git update-ref refs/heads/bogus "$new" &&
 135         test_when_finished "git update-ref -d refs/heads/bogus" &&
 136         test_must_fail git fsck 2>out &&
 137         cat out &&
 138         grep "error in commit $new.* - bad name" out
 139 '
 140
 141 test_expect_success 'missing email is reported nicely' '
 142         git cat-file commit HEAD >basis &&
 143         sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 &&
 144         new=$(git hash-object -t commit -w --stdin <bad-email-3) &&
 145         test_when_finished "remove_object $new" &&
 146         git update-ref refs/heads/bogus "$new" &&
 147         test_when_finished "git update-ref -d refs/heads/bogus" &&
 148         test_must_fail git fsck 2>out &&
 149         cat out &&
 150         grep "error in commit $new.* - missing email" out
 151 '
 152
 153 test_expect_success '> in name is reported' '
 154         git cat-file commit HEAD >basis &&
 155         sed "s/ </> </" basis >bad-email-4 &&
 156         new=$(git hash-object -t commit -w --stdin <bad-email-4) &&
 157         test_when_finished "remove_object $new" &&
 158         git update-ref refs/heads/bogus "$new" &&
 159         test_when_finished "git update-ref -d refs/heads/bogus" &&
 160         test_must_fail git fsck 2>out &&
 161         cat out &&
 162         grep "error in commit $new" out
 163 '
 164
 165 # date is 2^64 + 1
 166 test_expect_success 'integer overflow in timestamps is reported' '
 167         git cat-file commit HEAD >basis &&
 168         sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \
 169                 <basis >bad-timestamp &&
 170         new=$(git hash-object -t commit -w --stdin <bad-timestamp) &&
 171         test_when_finished "remove_object $new" &&
 172         git update-ref refs/heads/bogus "$new" &&
 173         test_when_finished "git update-ref -d refs/heads/bogus" &&
 174         test_must_fail git fsck 2>out &&
 175         cat out &&
 176         grep "error in commit $new.*integer overflow" out
 177 '
 178
 179 test_expect_success 'commit with NUL in header' '
 180         git cat-file commit HEAD >basis &&
 181         sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header &&
 182         new=$(git hash-object -t commit -w --stdin <commit-NUL-header) &&
 183         test_when_finished "remove_object $new" &&
 184         git update-ref refs/heads/bogus "$new" &&
 185         test_when_finished "git update-ref -d refs/heads/bogus" &&
 186         test_must_fail git fsck 2>out &&
 187         cat out &&
 188         grep "error in commit $new.*unterminated header: NUL at offset" out
 189 '
 190
 191 test_expect_success 'tree object with duplicate entries' '
 192         test_when_finished "for i in \$T; do remove_object \$i; done" &&
 193         T=$(
 194                 GIT_INDEX_FILE=test-index &&
 195                 export GIT_INDEX_FILE &&
 196                 rm -f test-index &&
 197                 >x &&
 198                 git add x &&
 199                 git rev-parse :x &&
 200                 T=$(git write-tree) &&
 201                 echo $T &&
 202                 (
 203                         git cat-file tree $T &&
 204                         git cat-file tree $T
 205                 ) |
 206                 git hash-object -w -t tree --stdin
 207         ) &&
 208         test_must_fail git fsck 2>out &&
 209         grep "error in tree .*contains duplicate file entries" out
 210 '
 211
 212 test_expect_success 'unparseable tree object' '
 213         test_when_finished "git update-ref -d refs/heads/wrong" &&
 214         test_when_finished "remove_object \$tree_sha1" &&
 215         test_when_finished "remove_object \$commit_sha1" &&
 216         tree_sha1=$(printf "100644 \0twenty-bytes-of-junk" | git hash-object -t tree --stdin -w --literally) &&
 217         commit_sha1=$(git commit-tree $tree_sha1) &&
 218         git update-ref refs/heads/wrong $commit_sha1 &&
 219         test_must_fail git fsck 2>out &&
 220         test_i18ngrep "error: empty filename in tree entry" out &&
 221         test_i18ngrep "$tree_sha1" out &&
 222         test_i18ngrep ! "fatal: empty filename in tree entry" out
 223 '
 224
 225 hex2oct() {
 226         perl -ne 'printf "\\%03o", hex for /../g'
 227 }
 228
 229 test_expect_success 'tree entry with type mismatch' '
 230         test_when_finished "remove_object \$blob" &&
 231         test_when_finished "remove_object \$tree" &&
 232         test_when_finished "remove_object \$commit" &&
 233         test_when_finished "git update-ref -d refs/heads/type_mismatch" &&
 234         blob=$(echo blob | git hash-object -w --stdin) &&
 235         blob_bin=$(echo $blob | hex2oct) &&
 236         tree=$(
 237                 printf "40000 dir\0${blob_bin}100644 file\0${blob_bin}" |
 238                 git hash-object -t tree --stdin -w --literally
 239         ) &&
 240         commit=$(git commit-tree $tree) &&
 241         git update-ref refs/heads/type_mismatch $commit &&
 242         test_must_fail git fsck >out 2>&1 &&
 243         test_i18ngrep "is a blob, not a tree" out &&
 244         test_i18ngrep ! "dangling blob" out
 245 '
 246
 247 test_expect_success 'tag pointing to nonexistent' '
 248         cat >invalid-tag <<-\EOF &&
 249         object ffffffffffffffffffffffffffffffffffffffff
 250         type commit
 251         tag invalid
 252         tagger T A Gger <tagger@example.com> 1234567890 -0000
 253
 254         This is an invalid tag.
 255         EOF
 256
 257         tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
 258         test_when_finished "remove_object $tag" &&
 259         echo $tag >.git/refs/tags/invalid &&
 260         test_when_finished "git update-ref -d refs/tags/invalid" &&
 261         test_must_fail git fsck --tags >out &&
 262         cat out &&
 263         grep "broken link" out
 264 '
 265
 266 test_expect_success 'tag pointing to something else than its type' '
 267         sha=$(echo blob | git hash-object -w --stdin) &&
 268         test_when_finished "remove_object $sha" &&
 269         cat >wrong-tag <<-EOF &&
 270         object $sha
 271         type commit
 272         tag wrong
 273         tagger T A Gger <tagger@example.com> 1234567890 -0000
 274
 275         This is an invalid tag.
 276         EOF
 277
 278         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 279         test_when_finished "remove_object $tag" &&
 280         echo $tag >.git/refs/tags/wrong &&
 281         test_when_finished "git update-ref -d refs/tags/wrong" &&
 282         test_must_fail git fsck --tags
 283 '
 284
 285 test_expect_success 'tag with incorrect tag name & missing tagger' '
 286         sha=$(git rev-parse HEAD) &&
 287         cat >wrong-tag <<-EOF &&
 288         object $sha
 289         type commit
 290         tag wrong name format
 291
 292         This is an invalid tag.
 293         EOF
 294
 295         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 296         test_when_finished "remove_object $tag" &&
 297         echo $tag >.git/refs/tags/wrong &&
 298         test_when_finished "git update-ref -d refs/tags/wrong" &&
 299         git fsck --tags 2>out &&
 300
 301         cat >expect <<-EOF &&
 302         warning in tag $tag: badTagName: invalid '\''tag'\'' name: wrong name format
 303         warning in tag $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line
 304         EOF
 305         test_cmp expect out
 306 '
 307
 308 test_expect_success 'tag with bad tagger' '
 309         sha=$(git rev-parse HEAD) &&
 310         cat >wrong-tag <<-EOF &&
 311         object $sha
 312         type commit
 313         tag not-quite-wrong
 314         tagger Bad Tagger Name
 315
 316         This is an invalid tag.
 317         EOF
 318
 319         tag=$(git hash-object --literally -t tag -w --stdin <wrong-tag) &&
 320         test_when_finished "remove_object $tag" &&
 321         echo $tag >.git/refs/tags/wrong &&
 322         test_when_finished "git update-ref -d refs/tags/wrong" &&
 323         test_must_fail git fsck --tags 2>out &&
 324         grep "error in tag .*: invalid author/committer" out
 325 '
 326
 327 test_expect_success 'tag with NUL in header' '
 328         sha=$(git rev-parse HEAD) &&
 329         q_to_nul >tag-NUL-header <<-EOF &&
 330         object $sha
 331         type commit
 332         tag contains-Q-in-header
 333         tagger T A Gger <tagger@example.com> 1234567890 -0000
 334
 335         This is an invalid tag.
 336         EOF
 337
 338         tag=$(git hash-object --literally -t tag -w --stdin <tag-NUL-header) &&
 339         test_when_finished "remove_object $tag" &&
 340         echo $tag >.git/refs/tags/wrong &&
 341         test_when_finished "git update-ref -d refs/tags/wrong" &&
 342         test_must_fail git fsck --tags 2>out &&
 343         cat out &&
 344         grep "error in tag $tag.*unterminated header: NUL at offset" out
 345 '
 346
 347 test_expect_success 'cleaned up' '
 348         git fsck >actual 2>&1 &&
 349         test_cmp empty actual
 350 '
 351
 352 test_expect_success 'rev-list --verify-objects' '
 353         git rev-list --verify-objects --all >/dev/null 2>out &&
 354         test_cmp empty out
 355 '
 356
 357 test_expect_success 'rev-list --verify-objects with bad sha1' '
 358         sha=$(echo blob | git hash-object -w --stdin) &&
 359         old=$(echo $sha | sed "s+^..+&/+") &&
 360         new=$(dirname $old)/ffffffffffffffffffffffffffffffffffffff &&
 361         sha="$(dirname $new)$(basename $new)" &&
 362         mv .git/objects/$old .git/objects/$new &&
 363         test_when_finished "remove_object $sha" &&
 364         git update-index --add --cacheinfo 100644 $sha foo &&
 365         test_when_finished "git read-tree -u --reset HEAD" &&
 366         tree=$(git write-tree) &&
 367         test_when_finished "remove_object $tree" &&
 368         cmt=$(echo bogus | git commit-tree $tree) &&
 369         test_when_finished "remove_object $cmt" &&
 370         git update-ref refs/heads/bogus $cmt &&
 371         test_when_finished "git update-ref -d refs/heads/bogus" &&
 372
 373         test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 374         cat out &&
 375         grep -q "error: sha1 mismatch 63ffffffffffffffffffffffffffffffffffffff" out
 376 '
 377
 378 test_expect_success 'force fsck to ignore double author' '
 379         git cat-file commit HEAD >basis &&
 380         sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors &&
 381         new=$(git hash-object -t commit -w --stdin <multiple-authors) &&
 382         test_when_finished "remove_object $new" &&
 383         git update-ref refs/heads/bogus "$new" &&
 384         test_when_finished "git update-ref -d refs/heads/bogus" &&
 385         test_must_fail git fsck &&
 386         git -c fsck.multipleAuthors=ignore fsck
 387 '
 388
 389 _bz='\0'
 390 _bz5="$_bz$_bz$_bz$_bz$_bz"
 391 _bz20="$_bz5$_bz5$_bz5$_bz5"
 392
 393 test_expect_success 'fsck notices blob entry pointing to null sha1' '
 394         (git init null-blob &&
 395          cd null-blob &&
 396          sha=$(printf "100644 file$_bz$_bz20" |
 397                git hash-object -w --stdin -t tree) &&
 398           git fsck 2>out &&
 399           cat out &&
 400           grep "warning.*null sha1" out
 401         )
 402 '
 403
 404 test_expect_success 'fsck notices submodule entry pointing to null sha1' '
 405         (git init null-commit &&
 406          cd null-commit &&
 407          sha=$(printf "160000 submodule$_bz$_bz20" |
 408                git hash-object -w --stdin -t tree) &&
 409           git fsck 2>out &&
 410           cat out &&
 411           grep "warning.*null sha1" out
 412         )
 413 '
 414
 415 while read name path pretty; do
 416         while read mode type; do
 417                 : ${pretty:=$path}
 418                 test_expect_success "fsck notices $pretty as $type" '
 419                 (
 420                         git init $name-$type &&
 421                         cd $name-$type &&
 422                         echo content >file &&
 423                         git add file &&
 424                         git commit -m base &&
 425                         blob=$(git rev-parse :file) &&
 426                         tree=$(git rev-parse HEAD^{tree}) &&
 427                         value=$(eval "echo \$$type") &&
 428                         printf "$mode $type %s\t%s" "$value" "$path" >bad &&
 429                         bad_tree=$(git mktree <bad) &&
 430                         git fsck 2>out &&
 431                         cat out &&
 432                         grep "warning.*tree $bad_tree" out
 433                 )'
 434         done <<-\EOF
 435         100644 blob
 436         040000 tree
 437         EOF
 438 done <<-EOF
 439 dot .
 440 dotdot ..
 441 dotgit .git
 442 dotgit-case .GIT
 443 dotgit-unicode .gI${u200c}T .gI{u200c}T
 444 dotgit-case2 .Git
 445 git-tilde1 git~1
 446 dotgitdot .git.
 447 dot-backslash-case .\\\\.GIT\\\\foobar
 448 dotgit-case-backslash .git\\\\foobar
 449 EOF
 450
 451 test_expect_success 'fsck allows .Ňit' '
 452         (
 453                 git init not-dotgit &&
 454                 cd not-dotgit &&
 455                 echo content >file &&
 456                 git add file &&
 457                 git commit -m base &&
 458                 blob=$(git rev-parse :file) &&
 459                 printf "100644 blob $blob\t.\\305\\207it" >tree &&
 460                 tree=$(git mktree <tree) &&
 461                 git fsck 2>err &&
 462                 test_line_count = 0 err
 463         )
 464 '
 465
 466 test_expect_success 'NUL in commit' '
 467         rm -fr nul-in-commit &&
 468         git init nul-in-commit &&
 469         (
 470                 cd nul-in-commit &&
 471                 git commit --allow-empty -m "initial commitQNUL after message" &&
 472                 git cat-file commit HEAD >original &&
 473                 q_to_nul <original >munged &&
 474                 git hash-object -w -t commit --stdin <munged >name &&
 475                 git branch bad $(cat name) &&
 476
 477                 test_must_fail git -c fsck.nulInCommit=error fsck 2>warn.1 &&
 478                 grep nulInCommit warn.1 &&
 479                 git fsck 2>warn.2 &&
 480                 grep nulInCommit warn.2
 481         )
 482 '
 483
 484 # create a static test repo which is broken by omitting
 485 # one particular object ($1, which is looked up via rev-parse
 486 # in the new repository).
 487 create_repo_missing () {
 488         rm -rf missing &&
 489         git init missing &&
 490         (
 491                 cd missing &&
 492                 git commit -m one --allow-empty &&
 493                 mkdir subdir &&
 494                 echo content >subdir/file &&
 495                 git add subdir/file &&
 496                 git commit -m two &&
 497                 unrelated=$(echo unrelated | git hash-object --stdin -w) &&
 498                 git tag -m foo tag $unrelated &&
 499                 sha1=$(git rev-parse --verify "$1") &&
 500                 path=$(echo $sha1 | sed 's|..|&/|') &&
 501                 rm .git/objects/$path
 502         )
 503 }
 504
 505 test_expect_success 'fsck notices missing blob' '
 506         create_repo_missing HEAD:subdir/file &&
 507         test_must_fail git -C missing fsck
 508 '
 509
 510 test_expect_success 'fsck notices missing subtree' '
 511         create_repo_missing HEAD:subdir &&
 512         test_must_fail git -C missing fsck
 513 '
 514
 515 test_expect_success 'fsck notices missing root tree' '
 516         create_repo_missing HEAD^{tree} &&
 517         test_must_fail git -C missing fsck
 518 '
 519
 520 test_expect_success 'fsck notices missing parent' '
 521         create_repo_missing HEAD^ &&
 522         test_must_fail git -C missing fsck
 523 '
 524
 525 test_expect_success 'fsck notices missing tagged object' '
 526         create_repo_missing tag^{blob} &&
 527         test_must_fail git -C missing fsck
 528 '
 529
 530 test_expect_success 'fsck notices ref pointing to missing commit' '
 531         create_repo_missing HEAD &&
 532         test_must_fail git -C missing fsck
 533 '
 534
 535 test_expect_success 'fsck notices ref pointing to missing tag' '
 536         create_repo_missing tag &&
 537         test_must_fail git -C missing fsck
 538 '
 539
 540 test_expect_success 'fsck --connectivity-only' '
 541         rm -rf connectivity-only &&
 542         git init connectivity-only &&
 543         (
 544                 cd connectivity-only &&
 545                 touch empty &&
 546                 git add empty &&
 547                 test_commit empty &&
 548
 549                 # Drop the index now; we want to be sure that we
 550                 # recursively notice the broken objects
 551                 # because they are reachable from refs, not because
 552                 # they are in the index.
 553                 rm -f .git/index &&
 554
 555                 # corrupt the blob, but in a way that we can still identify
 556                 # its type. That lets us see that --connectivity-only is
 557                 # not actually looking at the contents, but leaves it
 558                 # free to examine the type if it chooses.
 559                 empty=.git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391 &&
 560                 blob=$(echo unrelated | git hash-object -w --stdin) &&
 561                 mv -f $(sha1_file $blob) $empty &&
 562
 563                 test_must_fail git fsck --strict &&
 564                 git fsck --strict --connectivity-only &&
 565                 tree=$(git rev-parse HEAD:) &&
 566                 suffix=${tree#??} &&
 567                 tree=.git/objects/${tree%$suffix}/$suffix &&
 568                 rm -f $tree &&
 569                 echo invalid >$tree &&
 570                 test_must_fail git fsck --strict --connectivity-only
 571         )
 572 '
 573
 574 test_expect_success 'fsck --connectivity-only with explicit head' '
 575         rm -rf connectivity-only &&
 576         git init connectivity-only &&
 577         (
 578                 cd connectivity-only &&
 579                 test_commit foo &&
 580                 rm -f .git/index &&
 581                 tree=$(git rev-parse HEAD^{tree}) &&
 582                 remove_object $(git rev-parse HEAD:foo.t) &&
 583                 test_must_fail git fsck --connectivity-only $tree
 584         )
 585 '
 586
 587 test_expect_success 'fsck --name-objects' '
 588         rm -rf name-objects &&
 589         git init name-objects &&
 590         (
 591                 cd name-objects &&
 592                 test_commit julius caesar.t &&
 593                 test_commit augustus &&
 594                 test_commit caesar &&
 595                 remove_object $(git rev-parse julius:caesar.t) &&
 596                 test_must_fail git fsck --name-objects >out &&
 597                 tree=$(git rev-parse --verify julius:) &&
 598                 egrep "$tree \((refs/heads/master|HEAD)@\{[0-9]*\}:" out
 599         )
 600 '
 601
 602 test_expect_success 'alternate objects are correctly blamed' '
 603         test_when_finished "rm -rf alt.git .git/objects/info/alternates" &&
 604         git init --bare alt.git &&
 605         echo "../../alt.git/objects" >.git/objects/info/alternates &&
 606         mkdir alt.git/objects/12 &&
 607         >alt.git/objects/12/34567890123456789012345678901234567890 &&
 608         test_must_fail git fsck >out 2>&1 &&
 609         grep alt.git out
 610 '
 611
 612 test_expect_success 'fsck errors in packed objects' '
 613         git cat-file commit HEAD >basis &&
 614         sed "s/</one/" basis >one &&
 615         sed "s/</foo/" basis >two &&
 616         one=$(git hash-object -t commit -w one) &&
 617         two=$(git hash-object -t commit -w two) &&
 618         pack=$(
 619                 {
 620                         echo $one &&
 621                         echo $two
 622                 } | git pack-objects .git/objects/pack/pack
 623         ) &&
 624         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 625         remove_object $one &&
 626         remove_object $two &&
 627         test_must_fail git fsck 2>out &&
 628         grep "error in commit $one.* - bad name" out &&
 629         grep "error in commit $two.* - bad name" out &&
 630         ! grep corrupt out
 631 '
 632
 633 test_expect_success 'fsck fails on corrupt packfile' '
 634         hsh=$(git commit-tree -m mycommit HEAD^{tree}) &&
 635         pack=$(echo $hsh | git pack-objects .git/objects/pack/pack) &&
 636
 637         # Corrupt the first byte of the first object. (It contains 3 type bits,
 638         # at least one of which is not zero, so setting the first byte to 0 is
 639         # sufficient.)
 640         chmod a+w .git/objects/pack/pack-$pack.pack &&
 641         printf '\0' | dd of=.git/objects/pack/pack-$pack.pack bs=1 conv=notrunc seek=12 &&
 642
 643         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 644         remove_object $hsh &&
 645         test_must_fail git fsck 2>out &&
 646         test_i18ngrep "checksum mismatch" out
 647 '
 648
 649 test_expect_success 'fsck finds problems in duplicate loose objects' '
 650         rm -rf broken-duplicate &&
 651         git init broken-duplicate &&
 652         (
 653                 cd broken-duplicate &&
 654                 test_commit duplicate &&
 655                 # no "-d" here, so we end up with duplicates
 656                 git repack &&
 657                 # now corrupt the loose copy
 658                 file=$(sha1_file "$(git rev-parse HEAD)") &&
 659                 rm "$file" &&
 660                 echo broken >"$file" &&
 661                 test_must_fail git fsck
 662         )
 663 '
 664
 665 test_expect_success 'fsck detects trailing loose garbage (commit)' '
 666         git cat-file commit HEAD >basis &&
 667         echo bump-commit-sha1 >>basis &&
 668         commit=$(git hash-object -w -t commit basis) &&
 669         file=$(sha1_file $commit) &&
 670         test_when_finished "remove_object $commit" &&
 671         chmod +w "$file" &&
 672         echo garbage >>"$file" &&
 673         test_must_fail git fsck 2>out &&
 674         test_i18ngrep "garbage.*$commit" out
 675 '
 676
 677 test_expect_success 'fsck detects trailing loose garbage (blob)' '
 678         blob=$(echo trailing | git hash-object -w --stdin) &&
 679         file=$(sha1_file $blob) &&
 680         test_when_finished "remove_object $blob" &&
 681         chmod +w "$file" &&
 682         echo garbage >>"$file" &&
 683         test_must_fail git fsck 2>out &&
 684         test_i18ngrep "garbage.*$blob" out
 685 '
 686
 687 # for each of type, we have one version which is referenced by another object
 688 # (and so while unreachable, not dangling), and another variant which really is
 689 # dangling.
 690 test_expect_success 'fsck notices dangling objects' '
 691         git init dangling &&
 692         (
 693                 cd dangling &&
 694                 blob=$(echo not-dangling | git hash-object -w --stdin) &&
 695                 dblob=$(echo dangling | git hash-object -w --stdin) &&
 696                 tree=$(printf "100644 blob %s\t%s\n" $blob one | git mktree) &&
 697                 dtree=$(printf "100644 blob %s\t%s\n" $blob two | git mktree) &&
 698                 commit=$(git commit-tree $tree) &&
 699                 dcommit=$(git commit-tree -p $commit $tree) &&
 700
 701                 cat >expect <<-EOF &&
 702                 dangling blob $dblob
 703                 dangling commit $dcommit
 704                 dangling tree $dtree
 705                 EOF
 706
 707                 git fsck >actual &&
 708                 # the output order is non-deterministic, as it comes from a hash
 709                 sort <actual >actual.sorted &&
 710                 test_cmp expect actual.sorted
 711         )
 712 '
 713
 714 test_expect_success 'fsck $name notices bogus $name' '
 715         test_must_fail git fsck bogus &&
 716         test_must_fail git fsck $ZERO_OID
 717 '
 718
 719 test_expect_success 'bogus head does not fallback to all heads' '
 720         # set up a case that will cause a reachability complaint
 721         echo to-be-deleted >foo &&
 722         git add foo &&
 723         blob=$(git rev-parse :foo) &&
 724         test_when_finished "git rm --cached foo" &&
 725         remove_object $blob &&
 726         test_must_fail git fsck $ZERO_OID >out 2>&1 &&
 727         ! grep $blob out
 728 '
 729
 730 # Corrupt the checksum on the index.
 731 # Add 1 to the last byte in the SHA.
 732 corrupt_index_checksum () {
 733     perl -w -e '
 734         use Fcntl ":seek";
 735         open my $fh, "+<", ".git/index" or die "open: $!";
 736         binmode $fh;
 737         seek $fh, -1, SEEK_END or die "seek: $!";
 738         read $fh, my $in_byte, 1 or die "read: $!";
 739
 740         $in_value = unpack("C", $in_byte);
 741         $out_value = ($in_value + 1) & 255;
 742
 743         $out_byte = pack("C", $out_value);
 744
 745         seek $fh, -1, SEEK_END or die "seek: $!";
 746         print $fh $out_byte;
 747         close $fh or die "close: $!";
 748     '
 749 }
 750
 751 # Corrupt the checksum on the index and then
 752 # verify that only fsck notices.
 753 test_expect_success 'detect corrupt index file in fsck' '
 754         cp .git/index .git/index.backup &&
 755         test_when_finished "mv .git/index.backup .git/index" &&
 756         corrupt_index_checksum &&
 757         test_must_fail git fsck --cache 2>errors &&
 758         grep "bad index file" errors
 759 '
 760
 761 test_done