Andrew's git / gitweb.git / t/t1450-fsck.sh
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t / t1450-fsck.shon commit cherry-pick/revert: add scissors line on merge conflict (1a2b985)
   1#!/bin/sh
   2
   3test_description='git fsck random collection of tests
   4
   5* (HEAD) B
   6* (master) A
   7'
   8
   9. ./test-lib.sh
  10
  11test_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'
  21
  22test_expect_success 'loose objects borrowed from alternate are not missing' '
  23        mkdir another &&
  24        (
  25                cd another &&
  26                git init &&
  27                echo ../../../.git/objects >.git/objects/info/alternates &&
  28                test_commit C fileC one &&
  29                git fsck --no-dangling >../actual 2>&1
  30        ) &&
  31        test_must_be_empty actual
  32'
  33
  34test_expect_success 'HEAD is part of refs, valid objects appear valid' '
  35        git fsck >actual 2>&1 &&
  36        test_must_be_empty actual
  37'
  38
  39# Corruption tests follow.  Make sure to remove all traces of the
  40# specific corruption you test afterwards, lest a later test trip over
  41# it.
  42
  43test_expect_success 'setup: helpers for corruption tests' '
  44        sha1_file() {
  45                remainder=${1#??} &&
  46                firsttwo=${1%$remainder} &&
  47                echo ".git/objects/$firsttwo/$remainder"
  48        } &&
  49
  50        remove_object() {
  51                rm "$(sha1_file "$1")"
  52        }
  53'
  54
  55test_expect_success 'object with bad sha1' '
  56        sha=$(echo blob | git hash-object -w --stdin) &&
  57        old=$(echo $sha | sed "s+^..+&/+") &&
  58        new=$(dirname $old)/ffffffffffffffffffffffffffffffffffffff &&
  59        sha="$(dirname $new)$(basename $new)" &&
  60        mv .git/objects/$old .git/objects/$new &&
  61        test_when_finished "remove_object $sha" &&
  62        git update-index --add --cacheinfo 100644 $sha foo &&
  63        test_when_finished "git read-tree -u --reset HEAD" &&
  64        tree=$(git write-tree) &&
  65        test_when_finished "remove_object $tree" &&
  66        cmt=$(echo bogus | git commit-tree $tree) &&
  67        test_when_finished "remove_object $cmt" &&
  68        git update-ref refs/heads/bogus $cmt &&
  69        test_when_finished "git update-ref -d refs/heads/bogus" &&
  70
  71        test_must_fail git fsck 2>out &&
  72        cat out &&
  73        test_i18ngrep "$sha.*corrupt" out
  74'
  75
  76test_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        cat out &&
  81        test_i18ngrep "not a commit" out
  82'
  83
  84test_expect_success 'HEAD link pointing at a funny object' '
  85        test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  86        mv .git/HEAD .git/SAVED_HEAD &&
  87        echo 0000000000000000000000000000000000000000 >.git/HEAD &&
  88        # avoid corrupt/broken HEAD from interfering with repo discovery
  89        test_must_fail env GIT_DIR=.git git fsck 2>out &&
  90        cat out &&
  91        test_i18ngrep "detached HEAD points" out
  92'
  93
  94test_expect_success 'HEAD link pointing at a funny place' '
  95        test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
  96        mv .git/HEAD .git/SAVED_HEAD &&
  97        echo "ref: refs/funny/place" >.git/HEAD &&
  98        # avoid corrupt/broken HEAD from interfering with repo discovery
  99        test_must_fail env GIT_DIR=.git git fsck 2>out &&
 100        cat out &&
 101        test_i18ngrep "HEAD points to something strange" out
 102'
 103
 104test_expect_success 'HEAD link pointing at a funny object (from different wt)' '
 105        test_when_finished "mv .git/SAVED_HEAD .git/HEAD" &&
 106        test_when_finished "rm -rf .git/worktrees wt" &&
 107        git worktree add wt &&
 108        mv .git/HEAD .git/SAVED_HEAD &&
 109        echo $ZERO_OID >.git/HEAD &&
 110        # avoid corrupt/broken HEAD from interfering with repo discovery
 111        test_must_fail git -C wt fsck 2>out &&
 112        test_i18ngrep "main-worktree/HEAD: detached HEAD points" out
 113'
 114
 115test_expect_success 'other worktree HEAD link pointing at a funny object' '
 116        test_when_finished "rm -rf .git/worktrees other" &&
 117        git worktree add other &&
 118        echo $ZERO_OID >.git/worktrees/other/HEAD &&
 119        test_must_fail git fsck 2>out &&
 120        test_i18ngrep "worktrees/other/HEAD: detached HEAD points" out
 121'
 122
 123test_expect_success 'other worktree HEAD link pointing at missing object' '
 124        test_when_finished "rm -rf .git/worktrees other" &&
 125        git worktree add other &&
 126        echo "Contents missing from repo" | git hash-object --stdin >.git/worktrees/other/HEAD &&
 127        test_must_fail git fsck 2>out &&
 128        test_i18ngrep "worktrees/other/HEAD: invalid sha1 pointer" out
 129'
 130
 131test_expect_success 'other worktree HEAD link pointing at a funny place' '
 132        test_when_finished "rm -rf .git/worktrees other" &&
 133        git worktree add other &&
 134        echo "ref: refs/funny/place" >.git/worktrees/other/HEAD &&
 135        test_must_fail git fsck 2>out &&
 136        test_i18ngrep "worktrees/other/HEAD points to something strange" out
 137'
 138
 139test_expect_success 'email without @ is okay' '
 140        git cat-file commit HEAD >basis &&
 141        sed "s/@/AT/" basis >okay &&
 142        new=$(git hash-object -t commit -w --stdin <okay) &&
 143        test_when_finished "remove_object $new" &&
 144        git update-ref refs/heads/bogus "$new" &&
 145        test_when_finished "git update-ref -d refs/heads/bogus" &&
 146        git fsck 2>out &&
 147        cat out &&
 148        ! grep "commit $new" out
 149'
 150
 151test_expect_success 'email with embedded > is not okay' '
 152        git cat-file commit HEAD >basis &&
 153        sed "s/@[a-z]/&>/" basis >bad-email &&
 154        new=$(git hash-object -t commit -w --stdin <bad-email) &&
 155        test_when_finished "remove_object $new" &&
 156        git update-ref refs/heads/bogus "$new" &&
 157        test_when_finished "git update-ref -d refs/heads/bogus" &&
 158        test_must_fail git fsck 2>out &&
 159        cat out &&
 160        test_i18ngrep "error in commit $new" out
 161'
 162
 163test_expect_success 'missing < email delimiter is reported nicely' '
 164        git cat-file commit HEAD >basis &&
 165        sed "s/<//" basis >bad-email-2 &&
 166        new=$(git hash-object -t commit -w --stdin <bad-email-2) &&
 167        test_when_finished "remove_object $new" &&
 168        git update-ref refs/heads/bogus "$new" &&
 169        test_when_finished "git update-ref -d refs/heads/bogus" &&
 170        test_must_fail git fsck 2>out &&
 171        cat out &&
 172        test_i18ngrep "error in commit $new.* - bad name" out
 173'
 174
 175test_expect_success 'missing email is reported nicely' '
 176        git cat-file commit HEAD >basis &&
 177        sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 &&
 178        new=$(git hash-object -t commit -w --stdin <bad-email-3) &&
 179        test_when_finished "remove_object $new" &&
 180        git update-ref refs/heads/bogus "$new" &&
 181        test_when_finished "git update-ref -d refs/heads/bogus" &&
 182        test_must_fail git fsck 2>out &&
 183        cat out &&
 184        test_i18ngrep "error in commit $new.* - missing email" out
 185'
 186
 187test_expect_success '> in name is reported' '
 188        git cat-file commit HEAD >basis &&
 189        sed "s/ </> </" basis >bad-email-4 &&
 190        new=$(git hash-object -t commit -w --stdin <bad-email-4) &&
 191        test_when_finished "remove_object $new" &&
 192        git update-ref refs/heads/bogus "$new" &&
 193        test_when_finished "git update-ref -d refs/heads/bogus" &&
 194        test_must_fail git fsck 2>out &&
 195        cat out &&
 196        test_i18ngrep "error in commit $new" out
 197'
 198
 199# date is 2^64 + 1
 200test_expect_success 'integer overflow in timestamps is reported' '
 201        git cat-file commit HEAD >basis &&
 202        sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \
 203                <basis >bad-timestamp &&
 204        new=$(git hash-object -t commit -w --stdin <bad-timestamp) &&
 205        test_when_finished "remove_object $new" &&
 206        git update-ref refs/heads/bogus "$new" &&
 207        test_when_finished "git update-ref -d refs/heads/bogus" &&
 208        test_must_fail git fsck 2>out &&
 209        cat out &&
 210        test_i18ngrep "error in commit $new.*integer overflow" out
 211'
 212
 213test_expect_success 'commit with NUL in header' '
 214        git cat-file commit HEAD >basis &&
 215        sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header &&
 216        new=$(git hash-object -t commit -w --stdin <commit-NUL-header) &&
 217        test_when_finished "remove_object $new" &&
 218        git update-ref refs/heads/bogus "$new" &&
 219        test_when_finished "git update-ref -d refs/heads/bogus" &&
 220        test_must_fail git fsck 2>out &&
 221        cat out &&
 222        test_i18ngrep "error in commit $new.*unterminated header: NUL at offset" out
 223'
 224
 225test_expect_success 'tree object with duplicate entries' '
 226        test_when_finished "for i in \$T; do remove_object \$i; done" &&
 227        T=$(
 228                GIT_INDEX_FILE=test-index &&
 229                export GIT_INDEX_FILE &&
 230                rm -f test-index &&
 231                >x &&
 232                git add x &&
 233                git rev-parse :x &&
 234                T=$(git write-tree) &&
 235                echo $T &&
 236                (
 237                        git cat-file tree $T &&
 238                        git cat-file tree $T
 239                ) |
 240                git hash-object -w -t tree --stdin
 241        ) &&
 242        test_must_fail git fsck 2>out &&
 243        test_i18ngrep "error in tree .*contains duplicate file entries" out
 244'
 245
 246test_expect_success 'unparseable tree object' '
 247        test_when_finished "git update-ref -d refs/heads/wrong" &&
 248        test_when_finished "remove_object \$tree_sha1" &&
 249        test_when_finished "remove_object \$commit_sha1" &&
 250        tree_sha1=$(printf "100644 \0twenty-bytes-of-junk" | git hash-object -t tree --stdin -w --literally) &&
 251        commit_sha1=$(git commit-tree $tree_sha1) &&
 252        git update-ref refs/heads/wrong $commit_sha1 &&
 253        test_must_fail git fsck 2>out &&
 254        test_i18ngrep "error: empty filename in tree entry" out &&
 255        test_i18ngrep "$tree_sha1" out &&
 256        test_i18ngrep ! "fatal: empty filename in tree entry" out
 257'
 258
 259hex2oct() {
 260        perl -ne 'printf "\\%03o", hex for /../g'
 261}
 262
 263test_expect_success 'tree entry with type mismatch' '
 264        test_when_finished "remove_object \$blob" &&
 265        test_when_finished "remove_object \$tree" &&
 266        test_when_finished "remove_object \$commit" &&
 267        test_when_finished "git update-ref -d refs/heads/type_mismatch" &&
 268        blob=$(echo blob | git hash-object -w --stdin) &&
 269        blob_bin=$(echo $blob | hex2oct) &&
 270        tree=$(
 271                printf "40000 dir\0${blob_bin}100644 file\0${blob_bin}" |
 272                git hash-object -t tree --stdin -w --literally
 273        ) &&
 274        commit=$(git commit-tree $tree) &&
 275        git update-ref refs/heads/type_mismatch $commit &&
 276        test_must_fail git fsck >out 2>&1 &&
 277        test_i18ngrep "is a blob, not a tree" out &&
 278        test_i18ngrep ! "dangling blob" out
 279'
 280
 281test_expect_success 'tag pointing to nonexistent' '
 282        cat >invalid-tag <<-\EOF &&
 283        object ffffffffffffffffffffffffffffffffffffffff
 284        type commit
 285        tag invalid
 286        tagger T A Gger <tagger@example.com> 1234567890 -0000
 287
 288        This is an invalid tag.
 289        EOF
 290
 291        tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
 292        test_when_finished "remove_object $tag" &&
 293        echo $tag >.git/refs/tags/invalid &&
 294        test_when_finished "git update-ref -d refs/tags/invalid" &&
 295        test_must_fail git fsck --tags >out &&
 296        cat out &&
 297        test_i18ngrep "broken link" out
 298'
 299
 300test_expect_success 'tag pointing to something else than its type' '
 301        sha=$(echo blob | git hash-object -w --stdin) &&
 302        test_when_finished "remove_object $sha" &&
 303        cat >wrong-tag <<-EOF &&
 304        object $sha
 305        type commit
 306        tag wrong
 307        tagger T A Gger <tagger@example.com> 1234567890 -0000
 308
 309        This is an invalid tag.
 310        EOF
 311
 312        tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 313        test_when_finished "remove_object $tag" &&
 314        echo $tag >.git/refs/tags/wrong &&
 315        test_when_finished "git update-ref -d refs/tags/wrong" &&
 316        test_must_fail git fsck --tags
 317'
 318
 319test_expect_success 'tag with incorrect tag name & missing tagger' '
 320        sha=$(git rev-parse HEAD) &&
 321        cat >wrong-tag <<-EOF &&
 322        object $sha
 323        type commit
 324        tag wrong name format
 325
 326        This is an invalid tag.
 327        EOF
 328
 329        tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
 330        test_when_finished "remove_object $tag" &&
 331        echo $tag >.git/refs/tags/wrong &&
 332        test_when_finished "git update-ref -d refs/tags/wrong" &&
 333        git fsck --tags 2>out &&
 334
 335        cat >expect <<-EOF &&
 336        warning in tag $tag: badTagName: invalid '\''tag'\'' name: wrong name format
 337        warning in tag $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line
 338        EOF
 339        test_i18ncmp expect out
 340'
 341
 342test_expect_success 'tag with bad tagger' '
 343        sha=$(git rev-parse HEAD) &&
 344        cat >wrong-tag <<-EOF &&
 345        object $sha
 346        type commit
 347        tag not-quite-wrong
 348        tagger Bad Tagger Name
 349
 350        This is an invalid tag.
 351        EOF
 352
 353        tag=$(git hash-object --literally -t tag -w --stdin <wrong-tag) &&
 354        test_when_finished "remove_object $tag" &&
 355        echo $tag >.git/refs/tags/wrong &&
 356        test_when_finished "git update-ref -d refs/tags/wrong" &&
 357        test_must_fail git fsck --tags 2>out &&
 358        test_i18ngrep "error in tag .*: invalid author/committer" out
 359'
 360
 361test_expect_success 'tag with NUL in header' '
 362        sha=$(git rev-parse HEAD) &&
 363        q_to_nul >tag-NUL-header <<-EOF &&
 364        object $sha
 365        type commit
 366        tag contains-Q-in-header
 367        tagger T A Gger <tagger@example.com> 1234567890 -0000
 368
 369        This is an invalid tag.
 370        EOF
 371
 372        tag=$(git hash-object --literally -t tag -w --stdin <tag-NUL-header) &&
 373        test_when_finished "remove_object $tag" &&
 374        echo $tag >.git/refs/tags/wrong &&
 375        test_when_finished "git update-ref -d refs/tags/wrong" &&
 376        test_must_fail git fsck --tags 2>out &&
 377        cat out &&
 378        test_i18ngrep "error in tag $tag.*unterminated header: NUL at offset" out
 379'
 380
 381test_expect_success 'cleaned up' '
 382        git fsck >actual 2>&1 &&
 383        test_must_be_empty actual
 384'
 385
 386test_expect_success 'rev-list --verify-objects' '
 387        git rev-list --verify-objects --all >/dev/null 2>out &&
 388        test_must_be_empty out
 389'
 390
 391test_expect_success 'rev-list --verify-objects with bad sha1' '
 392        sha=$(echo blob | git hash-object -w --stdin) &&
 393        old=$(echo $sha | sed "s+^..+&/+") &&
 394        new=$(dirname $old)/ffffffffffffffffffffffffffffffffffffff &&
 395        sha="$(dirname $new)$(basename $new)" &&
 396        mv .git/objects/$old .git/objects/$new &&
 397        test_when_finished "remove_object $sha" &&
 398        git update-index --add --cacheinfo 100644 $sha foo &&
 399        test_when_finished "git read-tree -u --reset HEAD" &&
 400        tree=$(git write-tree) &&
 401        test_when_finished "remove_object $tree" &&
 402        cmt=$(echo bogus | git commit-tree $tree) &&
 403        test_when_finished "remove_object $cmt" &&
 404        git update-ref refs/heads/bogus $cmt &&
 405        test_when_finished "git update-ref -d refs/heads/bogus" &&
 406
 407        test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 408        cat out &&
 409        test_i18ngrep -q "error: hash mismatch 63ffffffffffffffffffffffffffffffffffffff" out
 410'
 411
 412test_expect_success 'force fsck to ignore double author' '
 413        git cat-file commit HEAD >basis &&
 414        sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors &&
 415        new=$(git hash-object -t commit -w --stdin <multiple-authors) &&
 416        test_when_finished "remove_object $new" &&
 417        git update-ref refs/heads/bogus "$new" &&
 418        test_when_finished "git update-ref -d refs/heads/bogus" &&
 419        test_must_fail git fsck &&
 420        git -c fsck.multipleAuthors=ignore fsck
 421'
 422
 423_bz='\0'
 424_bz5="$_bz$_bz$_bz$_bz$_bz"
 425_bz20="$_bz5$_bz5$_bz5$_bz5"
 426
 427test_expect_success 'fsck notices blob entry pointing to null sha1' '
 428        (git init null-blob &&
 429         cd null-blob &&
 430         sha=$(printf "100644 file$_bz$_bz20" |
 431               git hash-object -w --stdin -t tree) &&
 432          git fsck 2>out &&
 433          cat out &&
 434          test_i18ngrep "warning.*null sha1" out
 435        )
 436'
 437
 438test_expect_success 'fsck notices submodule entry pointing to null sha1' '
 439        (git init null-commit &&
 440         cd null-commit &&
 441         sha=$(printf "160000 submodule$_bz$_bz20" |
 442               git hash-object -w --stdin -t tree) &&
 443          git fsck 2>out &&
 444          cat out &&
 445          test_i18ngrep "warning.*null sha1" out
 446        )
 447'
 448
 449while read name path pretty; do
 450        while read mode type; do
 451                : ${pretty:=$path}
 452                test_expect_success "fsck notices $pretty as $type" '
 453                (
 454                        git init $name-$type &&
 455                        cd $name-$type &&
 456                        echo content >file &&
 457                        git add file &&
 458                        git commit -m base &&
 459                        blob=$(git rev-parse :file) &&
 460                        tree=$(git rev-parse HEAD^{tree}) &&
 461                        value=$(eval "echo \$$type") &&
 462                        printf "$mode $type %s\t%s" "$value" "$path" >bad &&
 463                        bad_tree=$(git mktree <bad) &&
 464                        git fsck 2>out &&
 465                        cat out &&
 466                        test_i18ngrep "warning.*tree $bad_tree" out
 467                )'
 468        done <<-\EOF
 469        100644 blob
 470        040000 tree
 471        EOF
 472done <<-EOF
 473dot .
 474dotdot ..
 475dotgit .git
 476dotgit-case .GIT
 477dotgit-unicode .gI${u200c}T .gI{u200c}T
 478dotgit-case2 .Git
 479git-tilde1 git~1
 480dotgitdot .git.
 481dot-backslash-case .\\\\.GIT\\\\foobar
 482dotgit-case-backslash .git\\\\foobar
 483EOF
 484
 485test_expect_success 'fsck allows .Ňit' '
 486        (
 487                git init not-dotgit &&
 488                cd not-dotgit &&
 489                echo content >file &&
 490                git add file &&
 491                git commit -m base &&
 492                blob=$(git rev-parse :file) &&
 493                printf "100644 blob $blob\t.\\305\\207it" >tree &&
 494                tree=$(git mktree <tree) &&
 495                git fsck 2>err &&
 496                test_line_count = 0 err
 497        )
 498'
 499
 500test_expect_success 'NUL in commit' '
 501        rm -fr nul-in-commit &&
 502        git init nul-in-commit &&
 503        (
 504                cd nul-in-commit &&
 505                git commit --allow-empty -m "initial commitQNUL after message" &&
 506                git cat-file commit HEAD >original &&
 507                q_to_nul <original >munged &&
 508                git hash-object -w -t commit --stdin <munged >name &&
 509                git branch bad $(cat name) &&
 510
 511                test_must_fail git -c fsck.nulInCommit=error fsck 2>warn.1 &&
 512                test_i18ngrep nulInCommit warn.1 &&
 513                git fsck 2>warn.2 &&
 514                test_i18ngrep nulInCommit warn.2
 515        )
 516'
 517
 518# create a static test repo which is broken by omitting
 519# one particular object ($1, which is looked up via rev-parse
 520# in the new repository).
 521create_repo_missing () {
 522        rm -rf missing &&
 523        git init missing &&
 524        (
 525                cd missing &&
 526                git commit -m one --allow-empty &&
 527                mkdir subdir &&
 528                echo content >subdir/file &&
 529                git add subdir/file &&
 530                git commit -m two &&
 531                unrelated=$(echo unrelated | git hash-object --stdin -w) &&
 532                git tag -m foo tag $unrelated &&
 533                sha1=$(git rev-parse --verify "$1") &&
 534                path=$(echo $sha1 | sed 's|..|&/|') &&
 535                rm .git/objects/$path
 536        )
 537}
 538
 539test_expect_success 'fsck notices missing blob' '
 540        create_repo_missing HEAD:subdir/file &&
 541        test_must_fail git -C missing fsck
 542'
 543
 544test_expect_success 'fsck notices missing subtree' '
 545        create_repo_missing HEAD:subdir &&
 546        test_must_fail git -C missing fsck
 547'
 548
 549test_expect_success 'fsck notices missing root tree' '
 550        create_repo_missing HEAD^{tree} &&
 551        test_must_fail git -C missing fsck
 552'
 553
 554test_expect_success 'fsck notices missing parent' '
 555        create_repo_missing HEAD^ &&
 556        test_must_fail git -C missing fsck
 557'
 558
 559test_expect_success 'fsck notices missing tagged object' '
 560        create_repo_missing tag^{blob} &&
 561        test_must_fail git -C missing fsck
 562'
 563
 564test_expect_success 'fsck notices ref pointing to missing commit' '
 565        create_repo_missing HEAD &&
 566        test_must_fail git -C missing fsck
 567'
 568
 569test_expect_success 'fsck notices ref pointing to missing tag' '
 570        create_repo_missing tag &&
 571        test_must_fail git -C missing fsck
 572'
 573
 574test_expect_success 'fsck --connectivity-only' '
 575        rm -rf connectivity-only &&
 576        git init connectivity-only &&
 577        (
 578                cd connectivity-only &&
 579                touch empty &&
 580                git add empty &&
 581                test_commit empty &&
 582
 583                # Drop the index now; we want to be sure that we
 584                # recursively notice the broken objects
 585                # because they are reachable from refs, not because
 586                # they are in the index.
 587                rm -f .git/index &&
 588
 589                # corrupt the blob, but in a way that we can still identify
 590                # its type. That lets us see that --connectivity-only is
 591                # not actually looking at the contents, but leaves it
 592                # free to examine the type if it chooses.
 593                empty=.git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391 &&
 594                blob=$(echo unrelated | git hash-object -w --stdin) &&
 595                mv -f $(sha1_file $blob) $empty &&
 596
 597                test_must_fail git fsck --strict &&
 598                git fsck --strict --connectivity-only &&
 599                tree=$(git rev-parse HEAD:) &&
 600                suffix=${tree#??} &&
 601                tree=.git/objects/${tree%$suffix}/$suffix &&
 602                rm -f $tree &&
 603                echo invalid >$tree &&
 604                test_must_fail git fsck --strict --connectivity-only
 605        )
 606'
 607
 608test_expect_success 'fsck --connectivity-only with explicit head' '
 609        rm -rf connectivity-only &&
 610        git init connectivity-only &&
 611        (
 612                cd connectivity-only &&
 613                test_commit foo &&
 614                rm -f .git/index &&
 615                tree=$(git rev-parse HEAD^{tree}) &&
 616                remove_object $(git rev-parse HEAD:foo.t) &&
 617                test_must_fail git fsck --connectivity-only $tree
 618        )
 619'
 620
 621test_expect_success 'fsck --name-objects' '
 622        rm -rf name-objects &&
 623        git init name-objects &&
 624        (
 625                cd name-objects &&
 626                test_commit julius caesar.t &&
 627                test_commit augustus &&
 628                test_commit caesar &&
 629                remove_object $(git rev-parse julius:caesar.t) &&
 630                test_must_fail git fsck --name-objects >out &&
 631                tree=$(git rev-parse --verify julius:) &&
 632                test_i18ngrep -E "$tree \((refs/heads/master|HEAD)@\{[0-9]*\}:" out
 633        )
 634'
 635
 636test_expect_success 'alternate objects are correctly blamed' '
 637        test_when_finished "rm -rf alt.git .git/objects/info/alternates" &&
 638        git init --bare alt.git &&
 639        echo "../../alt.git/objects" >.git/objects/info/alternates &&
 640        mkdir alt.git/objects/12 &&
 641        >alt.git/objects/12/34567890123456789012345678901234567890 &&
 642        test_must_fail git fsck >out 2>&1 &&
 643        test_i18ngrep alt.git out
 644'
 645
 646test_expect_success 'fsck errors in packed objects' '
 647        git cat-file commit HEAD >basis &&
 648        sed "s/</one/" basis >one &&
 649        sed "s/</foo/" basis >two &&
 650        one=$(git hash-object -t commit -w one) &&
 651        two=$(git hash-object -t commit -w two) &&
 652        pack=$(
 653                {
 654                        echo $one &&
 655                        echo $two
 656                } | git pack-objects .git/objects/pack/pack
 657        ) &&
 658        test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 659        remove_object $one &&
 660        remove_object $two &&
 661        test_must_fail git fsck 2>out &&
 662        test_i18ngrep "error in commit $one.* - bad name" out &&
 663        test_i18ngrep "error in commit $two.* - bad name" out &&
 664        ! grep corrupt out
 665'
 666
 667test_expect_success 'fsck fails on corrupt packfile' '
 668        hsh=$(git commit-tree -m mycommit HEAD^{tree}) &&
 669        pack=$(echo $hsh | git pack-objects .git/objects/pack/pack) &&
 670
 671        # Corrupt the first byte of the first object. (It contains 3 type bits,
 672        # at least one of which is not zero, so setting the first byte to 0 is
 673        # sufficient.)
 674        chmod a+w .git/objects/pack/pack-$pack.pack &&
 675        printf '\0' | dd of=.git/objects/pack/pack-$pack.pack bs=1 conv=notrunc seek=12 &&
 676
 677        test_when_finished "rm -f .git/objects/pack/pack-$pack.*" &&
 678        remove_object $hsh &&
 679        test_must_fail git fsck 2>out &&
 680        test_i18ngrep "checksum mismatch" out
 681'
 682
 683test_expect_success 'fsck finds problems in duplicate loose objects' '
 684        rm -rf broken-duplicate &&
 685        git init broken-duplicate &&
 686        (
 687                cd broken-duplicate &&
 688                test_commit duplicate &&
 689                # no "-d" here, so we end up with duplicates
 690                git repack &&
 691                # now corrupt the loose copy
 692                file=$(sha1_file "$(git rev-parse HEAD)") &&
 693                rm "$file" &&
 694                echo broken >"$file" &&
 695                test_must_fail git fsck
 696        )
 697'
 698
 699test_expect_success 'fsck detects trailing loose garbage (commit)' '
 700        git cat-file commit HEAD >basis &&
 701        echo bump-commit-sha1 >>basis &&
 702        commit=$(git hash-object -w -t commit basis) &&
 703        file=$(sha1_file $commit) &&
 704        test_when_finished "remove_object $commit" &&
 705        chmod +w "$file" &&
 706        echo garbage >>"$file" &&
 707        test_must_fail git fsck 2>out &&
 708        test_i18ngrep "garbage.*$commit" out
 709'
 710
 711test_expect_success 'fsck detects trailing loose garbage (large blob)' '
 712        blob=$(echo trailing | git hash-object -w --stdin) &&
 713        file=$(sha1_file $blob) &&
 714        test_when_finished "remove_object $blob" &&
 715        chmod +w "$file" &&
 716        echo garbage >>"$file" &&
 717        test_must_fail git -c core.bigfilethreshold=5 fsck 2>out &&
 718        test_i18ngrep "garbage.*$blob" out
 719'
 720
 721test_expect_success 'fsck detects truncated loose object' '
 722        # make it big enough that we know we will truncate in the data
 723        # portion, not the header
 724        test-tool genrandom truncate 4096 >file &&
 725        blob=$(git hash-object -w file) &&
 726        file=$(sha1_file $blob) &&
 727        test_when_finished "remove_object $blob" &&
 728        test_copy_bytes 1024 <"$file" >tmp &&
 729        rm "$file" &&
 730        mv -f tmp "$file" &&
 731
 732        # check both regular and streaming code paths
 733        test_must_fail git fsck 2>out &&
 734        test_i18ngrep corrupt.*$blob out &&
 735
 736        test_must_fail git -c core.bigfilethreshold=128 fsck 2>out &&
 737        test_i18ngrep corrupt.*$blob out
 738'
 739
 740# for each of type, we have one version which is referenced by another object
 741# (and so while unreachable, not dangling), and another variant which really is
 742# dangling.
 743test_expect_success 'create dangling-object repository' '
 744        git init dangling &&
 745        (
 746                cd dangling &&
 747                blob=$(echo not-dangling | git hash-object -w --stdin) &&
 748                dblob=$(echo dangling | git hash-object -w --stdin) &&
 749                tree=$(printf "100644 blob %s\t%s\n" $blob one | git mktree) &&
 750                dtree=$(printf "100644 blob %s\t%s\n" $blob two | git mktree) &&
 751                commit=$(git commit-tree $tree) &&
 752                dcommit=$(git commit-tree -p $commit $tree) &&
 753
 754                cat >expect <<-EOF
 755                dangling blob $dblob
 756                dangling commit $dcommit
 757                dangling tree $dtree
 758                EOF
 759        )
 760'
 761
 762test_expect_success 'fsck notices dangling objects' '
 763        (
 764                cd dangling &&
 765                git fsck >actual &&
 766                # the output order is non-deterministic, as it comes from a hash
 767                sort <actual >actual.sorted &&
 768                test_i18ncmp expect actual.sorted
 769        )
 770'
 771
 772test_expect_success 'fsck --connectivity-only notices dangling objects' '
 773        (
 774                cd dangling &&
 775                git fsck --connectivity-only >actual &&
 776                # the output order is non-deterministic, as it comes from a hash
 777                sort <actual >actual.sorted &&
 778                test_i18ncmp expect actual.sorted
 779        )
 780'
 781
 782test_expect_success 'fsck $name notices bogus $name' '
 783        test_must_fail git fsck bogus &&
 784        test_must_fail git fsck $ZERO_OID
 785'
 786
 787test_expect_success 'bogus head does not fallback to all heads' '
 788        # set up a case that will cause a reachability complaint
 789        echo to-be-deleted >foo &&
 790        git add foo &&
 791        blob=$(git rev-parse :foo) &&
 792        test_when_finished "git rm --cached foo" &&
 793        remove_object $blob &&
 794        test_must_fail git fsck $ZERO_OID >out 2>&1 &&
 795        ! grep $blob out
 796'
 797
 798# Corrupt the checksum on the index.
 799# Add 1 to the last byte in the SHA.
 800corrupt_index_checksum () {
 801    perl -w -e '
 802        use Fcntl ":seek";
 803        open my $fh, "+<", ".git/index" or die "open: $!";
 804        binmode $fh;
 805        seek $fh, -1, SEEK_END or die "seek: $!";
 806        read $fh, my $in_byte, 1 or die "read: $!";
 807
 808        $in_value = unpack("C", $in_byte);
 809        $out_value = ($in_value + 1) & 255;
 810
 811        $out_byte = pack("C", $out_value);
 812
 813        seek $fh, -1, SEEK_END or die "seek: $!";
 814        print $fh $out_byte;
 815        close $fh or die "close: $!";
 816    '
 817}
 818
 819# Corrupt the checksum on the index and then
 820# verify that only fsck notices.
 821test_expect_success 'detect corrupt index file in fsck' '
 822        cp .git/index .git/index.backup &&
 823        test_when_finished "mv .git/index.backup .git/index" &&
 824        corrupt_index_checksum &&
 825        test_must_fail git fsck --cache 2>errors &&
 826        test_i18ngrep "bad index file" errors
 827'
 828
 829test_done