Andrew's git / gitweb.git / t/t1450-fsck.sh
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t / t1450-fsck.shon commit t6000-t6999: fix broken &&-chains (c8ce376)
   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        >empty
  21'
  22
  23test_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
  35test_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
  44test_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 "$1")"
  53        }
  54'
  55
  56test_expect_success 'object with bad sha1' '
  57        sha=$(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
  77test_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
  85test_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
  95test_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
 105test_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 $new" out
 115'
 116
 117test_expect_success 'email with embedded > is not okay' '
 118        git cat-file commit HEAD >basis &&
 119        sed "s/@[a-z]/&>/" basis >bad-email &&
 120        new=$(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 $new" out
 127'
 128
 129test_expect_success 'missing < email delimiter is reported nicely' '
 130        git cat-file commit HEAD >basis &&
 131        sed "s/<//" basis >bad-email-2 &&
 132        new=$(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 $new.* - bad name" out
 139'
 140
 141test_expect_success 'missing email is reported nicely' '
 142        git cat-file commit HEAD >basis &&
 143        sed "s/[a-z]* <[^>]*>//" basis >bad-email-3 &&
 144        new=$(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 $new.* - missing email" out
 151'
 152
 153test_expect_success '> in name is reported' '
 154        git cat-file commit HEAD >basis &&
 155        sed "s/ </> </" basis >bad-email-4 &&
 156        new=$(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 $new" out
 163'
 164
 165# date is 2^64 + 1
 166test_expect_success 'integer overflow in timestamps is reported' '
 167        git cat-file commit HEAD >basis &&
 168        sed "s/^\\(author .*>\\) [0-9]*/\\1 18446744073709551617/" \
 169                <basis >bad-timestamp &&
 170        new=$(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 $new.*integer overflow" out
 177'
 178
 179test_expect_success 'commit with NUL in header' '
 180        git cat-file commit HEAD >basis &&
 181        sed "s/author ./author Q/" <basis | q_to_nul >commit-NUL-header &&
 182        new=$(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 $new.*unterminated header: NUL at offset" out
 189'
 190
 191test_expect_success 'tree object with duplicate entries' '
 192        test_when_finished "for i in \$T; do remove_object \$i; done" &&
 193        T=$(
 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 $T
 205                ) |
 206                git hash-object -w -t tree --stdin
 207        ) &&
 208        test_must_fail git fsck 2>out &&
 209        grep "error in tree .*contains duplicate file entries" out
 210'
 211
 212test_expect_success 'unparseable tree object' '
 213        test_when_finished "git update-ref -d refs/heads/wrong" &&
 214        test_when_finished "remove_object \$tree_sha1" &&
 215        test_when_finished "remove_object \$commit_sha1" &&
 216        tree_sha1=$(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
 225hex2oct() {
 226        perl -ne 'printf "\\%03o", hex for /../g'
 227}
 228
 229test_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 $commit &&
 242        test_must_fail git fsck >out 2>&1 &&
 243        test_i18ngrep "is a blob, not a tree" out &&
 244        test_i18ngrep ! "dangling blob" out
 245'
 246
 247test_expect_success 'tag pointing to nonexistent' '
 248        cat >invalid-tag <<-\EOF &&
 249        object ffffffffffffffffffffffffffffffffffffffff
 250        type commit
 251        tag invalid
 252        tagger T A Gger <tagger@example.com> 1234567890 -0000
 253
 254        This is an invalid tag.
 255        EOF
 256
 257        tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
 258        test_when_finished "remove_object $tag" &&
 259        echo $tag >.git/refs/tags/invalid &&
 260        test_when_finished "git update-ref -d refs/tags/invalid" &&
 261        test_must_fail git fsck --tags >out &&
 262        cat out &&
 263        grep "broken link" out
 264'
 265
 266test_expect_success 'tag pointing to something else than its type' '
 267        sha=$(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 $tag >.git/refs/tags/wrong &&
 281        test_when_finished "git update-ref -d refs/tags/wrong" &&
 282        test_must_fail git fsck --tags
 283'
 284
 285test_expect_success 'tag with incorrect tag name & missing tagger' '
 286        sha=$(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 $tag: missingTaggerEntry: invalid format - expected '\''tagger'\'' line
 304        EOF
 305        test_cmp expect out
 306'
 307
 308test_expect_success 'tag with bad tagger' '
 309        sha=$(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 $tag >.git/refs/tags/wrong &&
 322        test_when_finished "git update-ref -d refs/tags/wrong" &&
 323        test_must_fail git fsck --tags 2>out &&
 324        grep "error in tag .*: invalid author/committer" out
 325'
 326
 327test_expect_success 'tag with NUL in header' '
 328        sha=$(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 $tag.*unterminated header: NUL at offset" out
 345'
 346
 347test_expect_success 'cleaned up' '
 348        git fsck >actual 2>&1 &&
 349        test_cmp empty actual
 350'
 351
 352test_expect_success 'rev-list --verify-objects' '
 353        git rev-list --verify-objects --all >/dev/null 2>out &&
 354        test_cmp empty out
 355'
 356
 357test_expect_success 'rev-list --verify-objects with bad sha1' '
 358        sha=$(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 $cmt &&
 371        test_when_finished "git update-ref -d refs/heads/bogus" &&
 372
 373        test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 374        cat out &&
 375        grep -q "error: sha1 mismatch 63ffffffffffffffffffffffffffffffffffffff" out
 376'
 377
 378test_expect_success 'force fsck to ignore double author' '
 379        git cat-file commit HEAD >basis &&
 380        sed "s/^author .*/&,&/" <basis | tr , \\n >multiple-authors &&
 381        new=$(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$_bz5"
 392
 393test_expect_success 'fsck notices blob entry pointing to null sha1' '
 394        (git init null-blob &&
 395         cd null-blob &&
 396         sha=$(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
 404test_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
 415while 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 $bad_tree" out
 433                )'
 434        done <<-\EOF
 435        100644 blob
 436        040000 tree
 437        EOF
 438done <<-EOF
 439dot .
 440dotdot ..
 441dotgit .git
 442dotgit-case .GIT
 443dotgit-unicode .gI${u200c}T .gI{u200c}T
 444dotgit-case2 .Git
 445git-tilde1 git~1
 446dotgitdot .git.
 447dot-backslash-case .\\\\.GIT\\\\foobar
 448dotgit-case-backslash .git\\\\foobar
 449EOF
 450
 451test_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
 466test_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 ($1, which is looked up via rev-parse
 486# in the new repository).
 487create_repo_missing () {
 488        rm -rf missing &&
 489        git init missing &&
 490        (
 491                cd missing &&
 492                git commit -m one --allow-empty &&
 493                mkdir subdir &&
 494                echo content >subdir/file &&
 495                git add subdir/file &&
 496                git commit -m two &&
 497                unrelated=$(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
 505test_expect_success 'fsck notices missing blob' '
 506        create_repo_missing HEAD:subdir/file &&
 507        test_must_fail git -C missing fsck
 508'
 509
 510test_expect_success 'fsck notices missing subtree' '
 511        create_repo_missing HEAD:subdir &&
 512        test_must_fail git -C missing fsck
 513'
 514
 515test_expect_success 'fsck notices missing root tree' '
 516        create_repo_missing HEAD^{tree} &&
 517        test_must_fail git -C missing fsck
 518'
 519
 520test_expect_success 'fsck notices missing parent' '
 521        create_repo_missing HEAD^ &&
 522        test_must_fail git -C missing fsck
 523'
 524
 525test_expect_success 'fsck notices missing tagged object' '
 526        create_repo_missing tag^{blob} &&
 527        test_must_fail git -C missing fsck
 528'
 529
 530test_expect_success 'fsck notices ref pointing to missing commit' '
 531        create_repo_missing HEAD &&
 532        test_must_fail git -C missing fsck
 533'
 534
 535test_expect_success 'fsck notices ref pointing to missing tag' '
 536        create_repo_missing tag &&
 537        test_must_fail git -C missing fsck
 538'
 539
 540test_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
 574test_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
 587test_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
 602test_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
 612test_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 $two.* - bad name" out &&
 630        ! grep corrupt out
 631'
 632
 633test_expect_success 'fsck fails on corrupt packfile' '
 634        hsh=$(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 $hsh &&
 645        test_must_fail git fsck 2>out &&
 646        test_i18ngrep "checksum mismatch" out
 647'
 648
 649test_expect_success 'fsck finds problems in duplicate loose objects' '
 650        rm -rf broken-duplicate &&
 651        git init broken-duplicate &&
 652        (
 653                cd broken-duplicate &&
 654                test_commit duplicate &&
 655                # no "-d" here, so we end up with duplicates
 656                git repack &&
 657                # now corrupt the loose copy
 658                file=$(sha1_file "$(git rev-parse HEAD)") &&
 659                rm "$file" &&
 660                echo broken >"$file" &&
 661                test_must_fail git fsck
 662        )
 663'
 664
 665test_expect_success 'fsck detects trailing loose garbage (commit)' '
 666        git cat-file commit HEAD >basis &&
 667        echo bump-commit-sha1 >>basis &&
 668        commit=$(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
 677test_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.
 690test_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
 714test_expect_success 'fsck $name notices bogus $name' '
 715        test_must_fail git fsck bogus &&
 716        test_must_fail git fsck $ZERO_OID
 717'
 718
 719test_expect_success 'bogus head does not fallback to all heads' '
 720        # set up a case that will cause a reachability complaint
 721        echo to-be-deleted >foo &&
 722        git add foo &&
 723        blob=$(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.
 732corrupt_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.
 753test_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
 761test_done