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 $ZERO_OID >.git/worktrees/other/HEAD &&
 116         test_must_fail git fsck 2>out &&
 117         test_i18ngrep "worktrees/other/HEAD: detached HEAD points" out
 118 '
 119
 120 test_expect_success 'other worktree HEAD link pointing at missing object' '
 121         test_when_finished "rm -rf .git/worktrees other" &&
 122         git worktree add other &&
 123         echo "Contents missing from repo" | git hash-object --stdin >.git/worktrees/other/HEAD &&
 124         test_must_fail git fsck 2>out &&
 125         test_i18ngrep "worktrees/other/HEAD: invalid sha1 pointer" out
 126 '
 127
 128 test_expect_success 'other worktree HEAD link pointing at a funny place' '
 129         test_when_finished "rm -rf .git/worktrees other" &&
 130         git worktree add other &&
 131         echo "ref: refs/funny/place" >.git/worktrees/other/HEAD &&
 132         test_must_fail git fsck 2>out &&
 133         test_i18ngrep "worktrees/other/HEAD points to something strange" out
 134 '
 135
 136 test_expect_success 'commit with multiple signatures is okay' '
 137         git cat-file commit HEAD >basis &&
 138         cat >sigs <<-EOF &&
 139         gpgsig -----BEGIN PGP SIGNATURE-----
 140           VGhpcyBpcyBub3QgcmVhbGx5IGEgc2lnbmF0dXJlLg==
 141           -----END PGP SIGNATURE-----
 142         gpgsig-sha256 -----BEGIN PGP SIGNATURE-----
 143           VGhpcyBpcyBub3QgcmVhbGx5IGEgc2lnbmF0dXJlLg==
 144           -----END PGP SIGNATURE-----
 145         EOF
 146         sed -e "/^committer/q" basis >okay &&
 147         cat sigs >>okay &&
 148         echo >>okay &&
 149         sed -e "1,/^$/d" basis >>okay &&
 150         cat okay &&
 151         new=$(git hash-object -t commit -w --stdin <okay) &&
 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         git fsck 2>out &&
 156         cat out &&
 157         ! grep "commit $new" out
 158 '
 159
 160 test_expect_success 'email without @ is okay' '
 161         git cat-file commit HEAD >basis &&
 162         sed "s/@/AT/" basis >okay &&
 163         new=$(git hash-object -t commit -w --stdin <okay) &&
 164         test_when_finished "remove_object $new" &&
 165         git update-ref refs/heads/bogus "$new" &&
 166         test_when_finished "git update-ref -d refs/heads/bogus" &&
 167         git fsck 2>out &&
 168         ! grep "commit $new" out
 169 '
 170
 171 test_expect_success 'email with embedded > is not okay' '
 172         git cat-file commit HEAD >basis &&
 173         sed "s/@[a-z]/&>/" basis >bad-email &&
 174         new=$(git hash-object -t commit -w --stdin <bad-email) &&
 175         test_when_finished "remove_object $new" &&
 176         git update-ref refs/heads/bogus "$new" &&
 177         test_when_finished "git update-ref -d refs/heads/bogus" &&
 178         test_must_fail git fsck 2>out &&
 179         test_i18ngrep "error in commit $new" out
 180 '
 181
 182 test_expect_success 'missing < email delimiter is reported nicely' '
 183         git cat-file commit HEAD >basis &&
 184         sed "s/<//" basis >bad-email-2 &&
 185         new=$(git hash-object -t commit -w --stdin <bad-email-2) &&
 186         test_when_finished "remove_object $new" &&
 187         git update-ref refs/heads/bogus "$new" &&
 188         test_when_finished "git update-ref -d refs/heads/bogus" &&
 189         test_must_fail git fsck 2>out &&
 190         test_i18ngrep "error in commit $new.* - bad name" out
 191 '
 192
 193 test_expect_success 'missing email is reported nicely' '
 194         git cat-file commit HEAD >basis &&
 195         sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 &&
 196         new=$(git hash-object -t commit -w --stdin <bad-email-3) &&
 197         test_when_finished "remove_object $new" &&
 198         git update-ref refs/heads/bogus "$new" &&
 199         test_when_finished "git update-ref -d refs/heads/bogus" &&
 200         test_must_fail git fsck 2>out &&
 201         test_i18ngrep "error in commit $new.* - missing email" out
 202 '
 203
 204 test_expect_success '> in name is reported' '
 205         git cat-file commit HEAD >basis &&
 206         sed "s/ </> </" basis >bad-email-4 &&
 207         new=$(git hash-object -t commit -w --stdin <bad-email-4) &&
 208         test_when_finished "remove_object $new" &&
 209         git update-ref refs/heads/bogus "$new" &&
 210         test_when_finished "git update-ref -d refs/heads/bogus" &&
 211         test_must_fail git fsck 2>out &&
 212         test_i18ngrep "error in commit $new" out
 213 '
 214
 215 # date is 2^64 + 1
 216 test_expect_success 'integer overflow in timestamps is reported' '
 217         git cat-file commit HEAD >basis &&
 218         sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \
 219                 <basis >bad-timestamp &&
 220         new=$(git hash-object -t commit -w --stdin <bad-timestamp) &&
 221         test_when_finished "remove_object $new" &&
 222         git update-ref refs/heads/bogus "$new" &&
 223         test_when_finished "git update-ref -d refs/heads/bogus" &&
 224         test_must_fail git fsck 2>out &&
 225         test_i18ngrep "error in commit $new.*integer overflow" out
 226 '
 227
 228 test_expect_success 'commit with NUL in header' '
 229         git cat-file commit HEAD >basis &&
 230         sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header &&
 231         new=$(git hash-object -t commit -w --stdin <commit-NUL-header) &&
 232         test_when_finished "remove_object $new" &&
 233         git update-ref refs/heads/bogus "$new" &&
 234         test_when_finished "git update-ref -d refs/heads/bogus" &&
 235         test_must_fail git fsck 2>out &&
 236         test_i18ngrep "error in commit $new.*unterminated header: NUL at offset" out
 237 '
 238
 239 test_expect_success 'tree object with duplicate entries' '
 240         test_when_finished "for i in \$T; do remove_object \$i; done" &&
 241         T=$(
 242                 GIT_INDEX_FILE=test-index &&
 243                 export GIT_INDEX_FILE &&
 244                 rm -f test-index &&
 245                 >x &&
 246                 git add x &&
 247                 git rev-parse :x &&
 248                 T=$(git write-tree) &&
 249                 echo $T &&
 250                 (
 251                         git cat-file tree $T &&
 252                         git cat-file tree $T
 253                 ) |
 254                 git hash-object -w -t tree --stdin
 255         ) &&
 256         test_must_fail git fsck 2>out &&
 257         test_i18ngrep "error in tree .*contains duplicate file entries" out
 258 '
 259
 260 test_expect_success 'unparseable tree object' '
 261         test_oid_cache <<-\EOF &&
 262         junk sha1:twenty-bytes-of-junk
 263         junk sha256:twenty-bytes-of-junk-twelve-more
 264         EOF
 265
 266         test_when_finished "git update-ref -d refs/heads/wrong" &&
 267         test_when_finished "remove_object \$tree_sha1" &&
 268         test_when_finished "remove_object \$commit_sha1" &&
 269         junk=$(test_oid junk) &&
 270         tree_sha1=$(printf "100644 \0$junk" | git hash-object -t tree --stdin -w --literally) &&
 271         commit_sha1=$(git commit-tree $tree_sha1) &&
 272         git update-ref refs/heads/wrong $commit_sha1 &&
 273         test_must_fail git fsck 2>out &&
 274         test_i18ngrep "error: empty filename in tree entry" out &&
 275         test_i18ngrep "$tree_sha1" out &&
 276         test_i18ngrep ! "fatal: empty filename in tree entry" out
 277 '
 278
 279 test_expect_success 'tree entry with type mismatch' '
 280         test_when_finished "remove_object \$blob" &&
 281         test_when_finished "remove_object \$tree" &&
 282         test_when_finished "remove_object \$commit" &&
 283         test_when_finished "git update-ref -d refs/heads/type_mismatch" &&
 284         blob=$(echo blob | git hash-object -w --stdin) &&
 285         blob_bin=$(echo $blob | hex2oct) &&
 286         tree=$(
 287                 printf "40000 dir\0${blob_bin}100644 file\0${blob_bin}" |
 288                 git hash-object -t tree --stdin -w --literally
 289         ) &&
 290         commit=$(git commit-tree $tree) &&
 291         git update-ref refs/heads/type_mismatch $commit &&
 292         test_must_fail git fsck >out 2>&1 &&
 293         test_i18ngrep "is a blob, not a tree" out &&
 294         test_i18ngrep ! "dangling blob" out
 295 '
 296
 297 test_expect_success 'tag pointing to nonexistent' '
 298         badoid=$(test_oid deadbeef) &&
 299         cat >invalid-tag <<-EOF &&
 300         object $badoid
 301         type commit
 302         tag invalid
 303         tagger T A Gger <tagger@example.com> 1234567890 -0000
 304
 305         This is an invalid tag.
 306         EOF
 307
 308         tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
 309         test_when_finished "remove_object $tag" &&
 310         echo $tag >.git/refs/tags/invalid &&
 311         test_when_finished "git update-ref -d refs/tags/invalid" &&
 312         test_must_fail git fsck --tags >out &&
 313         test_i18ngrep "broken link" out
 314 '
 315
 316 test_expect_success 'tag pointing to something else than its type' '
 317         sha=$(echo blob | git hash-object -w --stdin) &&
 318         test_when_finished "remove_object $sha" &&
 319         cat >wrong-tag <<-EOF &&
 320         object $sha
 321         type commit
 322         tag wrong
 323         tagger T A Gger <tagger@example.com> 1234567890 -0000
 324
 325         This is an invalid tag.
 326         EOF
 327
 328         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 329         test_when_finished "remove_object $tag" &&
 330         echo $tag >.git/refs/tags/wrong &&
 331         test_when_finished "git update-ref -d refs/tags/wrong" &&
 332         test_must_fail git fsck --tags
 333 '
 334
 335 test_expect_success 'tag with incorrect tag name & missing tagger' '
 336         sha=$(git rev-parse HEAD) &&
 337         cat >wrong-tag <<-EOF &&
 338         object $sha
 339         type commit
 340         tag wrong name format
 341
 342         This is an invalid tag.
 343         EOF
 344
 345         tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 346         test_when_finished "remove_object $tag" &&
 347         echo $tag >.git/refs/tags/wrong &&
 348         test_when_finished "git update-ref -d refs/tags/wrong" &&
 349         git fsck --tags 2>out &&
 350
 351         cat >expect <<-EOF &&
 352         warning in tag $tag: badTagName: invalid '\''tag'\'' name: wrong name format
 353         warning in tag $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line
 354         EOF
 355         test_i18ncmp expect out
 356 '
 357
 358 test_expect_success 'tag with bad tagger' '
 359         sha=$(git rev-parse HEAD) &&
 360         cat >wrong-tag <<-EOF &&
 361         object $sha
 362         type commit
 363         tag not-quite-wrong
 364         tagger Bad Tagger Name
 365
 366         This is an invalid tag.
 367         EOF
 368
 369         tag=$(git hash-object --literally -t tag -w --stdin <wrong-tag) &&
 370         test_when_finished "remove_object $tag" &&
 371         echo $tag >.git/refs/tags/wrong &&
 372         test_when_finished "git update-ref -d refs/tags/wrong" &&
 373         test_must_fail git fsck --tags 2>out &&
 374         test_i18ngrep "error in tag .*: invalid author/committer" out
 375 '
 376
 377 test_expect_success 'tag with NUL in header' '
 378         sha=$(git rev-parse HEAD) &&
 379         q_to_nul >tag-NUL-header <<-EOF &&
 380         object $sha
 381         type commit
 382         tag contains-Q-in-header
 383         tagger T A Gger <tagger@example.com> 1234567890 -0000
 384
 385         This is an invalid tag.
 386         EOF
 387
 388         tag=$(git hash-object --literally -t tag -w --stdin <tag-NUL-header) &&
 389         test_when_finished "remove_object $tag" &&
 390         echo $tag >.git/refs/tags/wrong &&
 391         test_when_finished "git update-ref -d refs/tags/wrong" &&
 392         test_must_fail git fsck --tags 2>out &&
 393         test_i18ngrep "error in tag $tag.*unterminated header: NUL at offset" out
 394 '
 395
 396 test_expect_success 'cleaned up' '
 397         git fsck >actual 2>&1 &&
 398         test_must_be_empty actual
 399 '
 400
 401 test_expect_success 'rev-list --verify-objects' '
 402         git rev-list --verify-objects --all >/dev/null 2>out &&
 403         test_must_be_empty out
 404 '
 405
 406 test_expect_success 'rev-list --verify-objects with bad sha1' '
 407         sha=$(echo blob | git hash-object -w --stdin) &&
 408         old=$(test_oid_to_path $sha) &&
 409         new=$(dirname $old)/$(test_oid ff_2) &&
 410         sha="$(dirname $new)$(basename $new)" &&
 411         mv .git/objects/$old .git/objects/$new &&
 412         test_when_finished "remove_object $sha" &&
 413         git update-index --add --cacheinfo 100644 $sha foo &&
 414         test_when_finished "git read-tree -u --reset HEAD" &&
 415         tree=$(git write-tree) &&
 416         test_when_finished "remove_object $tree" &&
 417         cmt=$(echo bogus | git commit-tree $tree) &&
 418         test_when_finished "remove_object $cmt" &&
 419         git update-ref refs/heads/bogus $cmt &&
 420         test_when_finished "git update-ref -d refs/heads/bogus" &&
 421
 422         test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 423         test_i18ngrep -q "error: hash mismatch $(dirname $new)$(test_oid ff_2)" out
 424 '
 425
 426 test_expect_success 'force fsck to ignore double author' '
 427         git cat-file commit HEAD >basis &&
 428         sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors &&
 429         new=$(git hash-object -t commit -w --stdin <multiple-authors) &&
 430         test_when_finished "remove_object $new" &&
 431         git update-ref refs/heads/bogus "$new" &&
 432         test_when_finished "git update-ref -d refs/heads/bogus" &&
 433         test_must_fail git fsck &&
 434         git -c fsck.multipleAuthors=ignore fsck
 435 '
 436
 437 _bz='\0'
 438 _bzoid=$(printf $ZERO_OID | sed -e 's/00/\\0/g')
 439
 440 test_expect_success 'fsck notices blob entry pointing to null sha1' '
 441         (git init null-blob &&
 442          cd null-blob &&
 443          sha=$(printf "100644 file$_bz$_bzoid" |
 444                git hash-object -w --stdin -t tree) &&
 445           git fsck 2>out &&
 446           test_i18ngrep "warning.*null sha1" out
 447         )
 448 '
 449
 450 test_expect_success 'fsck notices submodule entry pointing to null sha1' '
 451         (git init null-commit &&
 452          cd null-commit &&
 453          sha=$(printf "160000 submodule$_bz$_bzoid" |
 454                git hash-object -w --stdin -t tree) &&
 455           git fsck 2>out &&
 456           test_i18ngrep "warning.*null sha1" out
 457         )
 458 '
 459
 460 while read name path pretty; do
 461         while read mode type; do
 462                 : ${pretty:=$path}
 463                 test_expect_success "fsck notices $pretty as $type" '
 464                 (
 465                         git init $name-$type &&
 466                         cd $name-$type &&
 467                         git config core.protectNTFS false &&
 468                         echo content >file &&
 469                         git add file &&
 470                         git commit -m base &&
 471                         blob=$(git rev-parse :file) &&
 472                         tree=$(git rev-parse HEAD^{tree}) &&
 473                         value=$(eval "echo \$$type") &&
 474                         printf "$mode $type %s\t%s" "$value" "$path" >bad &&
 475                         bad_tree=$(git mktree <bad) &&
 476                         git fsck 2>out &&
 477                         test_i18ngrep "warning.*tree $bad_tree" out
 478                 )'
 479         done <<-\EOF
 480         100644 blob
 481         040000 tree
 482         EOF
 483 done <<-EOF
 484 dot .
 485 dotdot ..
 486 dotgit .git
 487 dotgit-case .GIT
 488 dotgit-unicode .gI${u200c}T .gI{u200c}T
 489 dotgit-case2 .Git
 490 git-tilde1 git~1
 491 dotgitdot .git.
 492 dot-backslash-case .\\\\.GIT\\\\foobar
 493 dotgit-case-backslash .git\\\\foobar
 494 EOF
 495
 496 test_expect_success 'fsck allows .Ňit' '
 497         (
 498                 git init not-dotgit &&
 499                 cd not-dotgit &&
 500                 echo content >file &&
 501                 git add file &&
 502                 git commit -m base &&
 503                 blob=$(git rev-parse :file) &&
 504                 printf "100644 blob $blob\t.\\305\\207it" >tree &&
 505                 tree=$(git mktree <tree) &&
 506                 git fsck 2>err &&
 507                 test_line_count = 0 err
 508         )
 509 '
 510
 511 test_expect_success 'NUL in commit' '
 512         rm -fr nul-in-commit &&
 513         git init nul-in-commit &&
 514         (
 515                 cd nul-in-commit &&
 516                 git commit --allow-empty -m "initial commitQNUL after message" &&
 517                 git cat-file commit HEAD >original &&
 518                 q_to_nul <original >munged &&
 519                 git hash-object -w -t commit --stdin <munged >name &&
 520                 git branch bad $(cat name) &&
 521
 522                 test_must_fail git -c fsck.nulInCommit=error fsck 2>warn.1 &&
 523                 test_i18ngrep nulInCommit warn.1 &&
 524                 git fsck 2>warn.2 &&
 525                 test_i18ngrep nulInCommit warn.2
 526         )
 527 '
 528
 529 # create a static test repo which is broken by omitting
 530 # one particular object ($1, which is looked up via rev-parse
 531 # in the new repository).
 532 create_repo_missing () {
 533         rm -rf missing &&
 534         git init missing &&
 535         (
 536                 cd missing &&
 537                 git commit -m one --allow-empty &&
 538                 mkdir subdir &&
 539                 echo content >subdir/file &&
 540                 git add subdir/file &&
 541                 git commit -m two &&
 542                 unrelated=$(echo unrelated | git hash-object --stdin -w) &&
 543                 git tag -m foo tag $unrelated &&
 544                 sha1=$(git rev-parse --verify "$1") &&
 545                 path=$(echo $sha1 | sed 's|..|&/|') &&
 546                 rm .git/objects/$path
 547         )
 548 }
 549
 550 test_expect_success 'fsck notices missing blob' '
 551         create_repo_missing HEAD:subdir/file &&
 552         test_must_fail git -C missing fsck
 553 '
 554
 555 test_expect_success 'fsck notices missing subtree' '
 556         create_repo_missing HEAD:subdir &&
 557         test_must_fail git -C missing fsck
 558 '
 559
 560 test_expect_success 'fsck notices missing root tree' '
 561         create_repo_missing HEAD^{tree} &&
 562         test_must_fail git -C missing fsck
 563 '
 564
 565 test_expect_success 'fsck notices missing parent' '
 566         create_repo_missing HEAD^ &&
 567         test_must_fail git -C missing fsck
 568 '
 569
 570 test_expect_success 'fsck notices missing tagged object' '
 571         create_repo_missing tag^{blob} &&
 572         test_must_fail git -C missing fsck
 573 '
 574
 575 test_expect_success 'fsck notices ref pointing to missing commit' '
 576         create_repo_missing HEAD &&
 577         test_must_fail git -C missing fsck
 578 '
 579
 580 test_expect_success 'fsck notices ref pointing to missing tag' '
 581         create_repo_missing tag &&
 582         test_must_fail git -C missing fsck
 583 '
 584
 585 test_expect_success 'fsck --connectivity-only' '
 586         rm -rf connectivity-only &&
 587         git init connectivity-only &&
 588         (
 589                 cd connectivity-only &&
 590                 touch empty &&
 591                 git add empty &&
 592                 test_commit empty &&
 593
 594                 # Drop the index now; we want to be sure that we
 595                 # recursively notice the broken objects
 596                 # because they are reachable from refs, not because
 597                 # they are in the index.
 598                 rm -f .git/index &&
 599
 600                 # corrupt the blob, but in a way that we can still identify
 601                 # its type. That lets us see that --connectivity-only is
 602                 # not actually looking at the contents, but leaves it
 603                 # free to examine the type if it chooses.
 604                 empty=.git/objects/$(test_oid_to_path $EMPTY_BLOB) &&
 605                 blob=$(echo unrelated | git hash-object -w --stdin) &&
 606                 mv -f $(sha1_file $blob) $empty &&
 607
 608                 test_must_fail git fsck --strict &&
 609                 git fsck --strict --connectivity-only &&
 610                 tree=$(git rev-parse HEAD:) &&
 611                 suffix=${tree#??} &&
 612                 tree=.git/objects/${tree%$suffix}/$suffix &&
 613                 rm -f $tree &&
 614                 echo invalid >$tree &&
 615                 test_must_fail git fsck --strict --connectivity-only
 616         )
 617 '
 618
 619 test_expect_success 'fsck --connectivity-only with explicit head' '
 620         rm -rf connectivity-only &&
 621         git init connectivity-only &&
 622         (
 623                 cd connectivity-only &&
 624                 test_commit foo &&
 625                 rm -f .git/index &&
 626                 tree=$(git rev-parse HEAD^{tree}) &&
 627                 remove_object $(git rev-parse HEAD:foo.t) &&
 628                 test_must_fail git fsck --connectivity-only $tree
 629         )
 630 '
 631
 632 test_expect_success 'fsck --name-objects' '
 633         rm -rf name-objects &&
 634         git init name-objects &&
 635         (
 636                 cd name-objects &&
 637                 test_commit julius caesar.t &&
 638                 test_commit augustus &&
 639                 test_commit caesar &&
 640                 remove_object $(git rev-parse julius:caesar.t) &&
 641                 test_must_fail git fsck --name-objects >out &&
 642                 tree=$(git rev-parse --verify julius:) &&
 643                 test_i18ngrep "$tree (refs/tags/julius:" out
 644         )
 645 '
 646
 647 test_expect_success 'alternate objects are correctly blamed' '
 648         test_when_finished "rm -rf alt.git .git/objects/info/alternates" &&
 649         name=$(test_oid numeric) &&
 650         path=$(test_oid_to_path "$name") &&
 651         git init --bare alt.git &&
 652         echo "../../alt.git/objects" >.git/objects/info/alternates &&
 653         mkdir alt.git/objects/$(dirname $path) &&
 654         >alt.git/objects/$(dirname $path)/$(basename $path) &&
 655         test_must_fail git fsck >out 2>&1 &&
 656         test_i18ngrep alt.git out
 657 '
 658
 659 test_expect_success 'fsck errors in packed objects' '
 660         git cat-file commit HEAD >basis &&
 661         sed "s/</one/" basis >one &&
 662         sed "s/</foo/" basis >two &&
 663         one=$(git hash-object -t commit -w one) &&
 664         two=$(git hash-object -t commit -w two) &&
 665         pack=$(
 666                 {
 667                         echo $one &&
 668                         echo $two
 669                 } | git pack-objects .git/objects/pack/pack
 670         ) &&
 671         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 672         remove_object $one &&
 673         remove_object $two &&
 674         test_must_fail git fsck 2>out &&
 675         test_i18ngrep "error in commit $one.* - bad name" out &&
 676         test_i18ngrep "error in commit $two.* - bad name" out &&
 677         ! grep corrupt out
 678 '
 679
 680 test_expect_success 'fsck fails on corrupt packfile' '
 681         hsh=$(git commit-tree -m mycommit HEAD^{tree}) &&
 682         pack=$(echo $hsh | git pack-objects .git/objects/pack/pack) &&
 683
 684         # Corrupt the first byte of the first object. (It contains 3 type bits,
 685         # at least one of which is not zero, so setting the first byte to 0 is
 686         # sufficient.)
 687         chmod a+w .git/objects/pack/pack-$pack.pack &&
 688         printf '\0' | dd of=.git/objects/pack/pack-$pack.pack bs=1 conv=notrunc seek=12 &&
 689
 690         test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 691         remove_object $hsh &&
 692         test_must_fail git fsck 2>out &&
 693         test_i18ngrep "checksum mismatch" out
 694 '
 695
 696 test_expect_success 'fsck finds problems in duplicate loose objects' '
 697         rm -rf broken-duplicate &&
 698         git init broken-duplicate &&
 699         (
 700                 cd broken-duplicate &&
 701                 test_commit duplicate &&
 702                 # no "-d" here, so we end up with duplicates
 703                 git repack &&
 704                 # now corrupt the loose copy
 705                 file=$(sha1_file "$(git rev-parse HEAD)") &&
 706                 rm "$file" &&
 707                 echo broken >"$file" &&
 708                 test_must_fail git fsck
 709         )
 710 '
 711
 712 test_expect_success 'fsck detects trailing loose garbage (commit)' '
 713         git cat-file commit HEAD >basis &&
 714         echo bump-commit-sha1 >>basis &&
 715         commit=$(git hash-object -w -t commit basis) &&
 716         file=$(sha1_file $commit) &&
 717         test_when_finished "remove_object $commit" &&
 718         chmod +w "$file" &&
 719         echo garbage >>"$file" &&
 720         test_must_fail git fsck 2>out &&
 721         test_i18ngrep "garbage.*$commit" out
 722 '
 723
 724 test_expect_success 'fsck detects trailing loose garbage (large blob)' '
 725         blob=$(echo trailing | git hash-object -w --stdin) &&
 726         file=$(sha1_file $blob) &&
 727         test_when_finished "remove_object $blob" &&
 728         chmod +w "$file" &&
 729         echo garbage >>"$file" &&
 730         test_must_fail git -c core.bigfilethreshold=5 fsck 2>out &&
 731         test_i18ngrep "garbage.*$blob" out
 732 '
 733
 734 test_expect_success 'fsck detects truncated loose object' '
 735         # make it big enough that we know we will truncate in the data
 736         # portion, not the header
 737         test-tool genrandom truncate 4096 >file &&
 738         blob=$(git hash-object -w file) &&
 739         file=$(sha1_file $blob) &&
 740         test_when_finished "remove_object $blob" &&
 741         test_copy_bytes 1024 <"$file" >tmp &&
 742         rm "$file" &&
 743         mv -f tmp "$file" &&
 744
 745         # check both regular and streaming code paths
 746         test_must_fail git fsck 2>out &&
 747         test_i18ngrep corrupt.*$blob out &&
 748
 749         test_must_fail git -c core.bigfilethreshold=128 fsck 2>out &&
 750         test_i18ngrep corrupt.*$blob out
 751 '
 752
 753 # for each of type, we have one version which is referenced by another object
 754 # (and so while unreachable, not dangling), and another variant which really is
 755 # dangling.
 756 test_expect_success 'create dangling-object repository' '
 757         git init dangling &&
 758         (
 759                 cd dangling &&
 760                 blob=$(echo not-dangling | git hash-object -w --stdin) &&
 761                 dblob=$(echo dangling | git hash-object -w --stdin) &&
 762                 tree=$(printf "100644 blob %s\t%s\n" $blob one | git mktree) &&
 763                 dtree=$(printf "100644 blob %s\t%s\n" $blob two | git mktree) &&
 764                 commit=$(git commit-tree $tree) &&
 765                 dcommit=$(git commit-tree -p $commit $tree) &&
 766
 767                 cat >expect <<-EOF
 768                 dangling blob $dblob
 769                 dangling commit $dcommit
 770                 dangling tree $dtree
 771                 EOF
 772         )
 773 '
 774
 775 test_expect_success 'fsck notices dangling objects' '
 776         (
 777                 cd dangling &&
 778                 git fsck >actual &&
 779                 # the output order is non-deterministic, as it comes from a hash
 780                 sort <actual >actual.sorted &&
 781                 test_i18ncmp expect actual.sorted
 782         )
 783 '
 784
 785 test_expect_success 'fsck --connectivity-only notices dangling objects' '
 786         (
 787                 cd dangling &&
 788                 git fsck --connectivity-only >actual &&
 789                 # the output order is non-deterministic, as it comes from a hash
 790                 sort <actual >actual.sorted &&
 791                 test_i18ncmp expect actual.sorted
 792         )
 793 '
 794
 795 test_expect_success 'fsck $name notices bogus $name' '
 796         test_must_fail git fsck bogus &&
 797         test_must_fail git fsck $ZERO_OID
 798 '
 799
 800 test_expect_success 'bogus head does not fallback to all heads' '
 801         # set up a case that will cause a reachability complaint
 802         echo to-be-deleted >foo &&
 803         git add foo &&
 804         blob=$(git rev-parse :foo) &&
 805         test_when_finished "git rm --cached foo" &&
 806         remove_object $blob &&
 807         test_must_fail git fsck $ZERO_OID >out 2>&1 &&
 808         ! grep $blob out
 809 '
 810
 811 # Corrupt the checksum on the index.
 812 # Add 1 to the last byte in the SHA.
 813 corrupt_index_checksum () {
 814     perl -w -e '
 815         use Fcntl ":seek";
 816         open my $fh, "+<", ".git/index" or die "open: $!";
 817         binmode $fh;
 818         seek $fh, -1, SEEK_END or die "seek: $!";
 819         read $fh, my $in_byte, 1 or die "read: $!";
 820
 821         $in_value = unpack("C", $in_byte);
 822         $out_value = ($in_value + 1) & 255;
 823
 824         $out_byte = pack("C", $out_value);
 825
 826         seek $fh, -1, SEEK_END or die "seek: $!";
 827         print $fh $out_byte;
 828         close $fh or die "close: $!";
 829     '
 830 }
 831
 832 # Corrupt the checksum on the index and then
 833 # verify that only fsck notices.
 834 test_expect_success 'detect corrupt index file in fsck' '
 835         cp .git/index .git/index.backup &&
 836         test_when_finished "mv .git/index.backup .git/index" &&
 837         corrupt_index_checksum &&
 838         test_must_fail git fsck --cache 2>errors &&
 839         test_i18ngrep "bad index file" errors
 840 '
 841
 842 test_done