t/t1060-object-corruption.sh

   1 #!/bin/sh
   2
   3 test_description='see how we handle various forms of corruption'
   4 . ./test-lib.sh
   5
   6 # convert "1234abcd" to ".git/objects/12/34abcd"
   7 obj_to_file() {
   8         echo "$(git rev-parse --git-dir)/objects/$(git rev-parse "$1" | sed 's,..,&/,')"
   9 }
  10
  11 # Convert byte at offset "$2" of object "$1" into '\0'
  12 corrupt_byte() {
  13         obj_file=$(obj_to_file "$1") &&
  14         chmod +w "$obj_file" &&
  15         printf '\0' | dd of="$obj_file" bs=1 seek="$2" conv=notrunc
  16 }
  17
  18 test_expect_success 'setup corrupt repo' '
  19         git init bit-error &&
  20         (
  21                 cd bit-error &&
  22                 test_commit content &&
  23                 corrupt_byte HEAD:content.t 10
  24         ) &&
  25         git init no-bit-error &&
  26         (
  27                 # distinct commit from bit-error, but containing a
  28                 # non-corrupted version of the same blob
  29                 cd no-bit-error &&
  30                 test_tick &&
  31                 test_commit content
  32         )
  33 '
  34
  35 test_expect_success 'setup repo with missing object' '
  36         git init missing &&
  37         (
  38                 cd missing &&
  39                 test_commit content &&
  40                 rm -f "$(obj_to_file HEAD:content.t)"
  41         )
  42 '
  43
  44 test_expect_success 'setup repo with misnamed object' '
  45         git init misnamed &&
  46         (
  47                 cd misnamed &&
  48                 test_commit content &&
  49                 good=$(obj_to_file HEAD:content.t) &&
  50                 blob=$(echo corrupt | git hash-object -w --stdin) &&
  51                 bad=$(obj_to_file $blob) &&
  52                 rm -f "$good" &&
  53                 mv "$bad" "$good"
  54         )
  55 '
  56
  57 test_expect_success 'streaming a corrupt blob fails' '
  58         (
  59                 cd bit-error &&
  60                 test_must_fail git cat-file blob HEAD:content.t
  61         )
  62 '
  63
  64 test_expect_success 'getting type of a corrupt blob fails' '
  65         (
  66                 cd bit-error &&
  67                 test_must_fail git cat-file -s HEAD:content.t
  68         )
  69 '
  70
  71 test_expect_success 'read-tree -u detects bit-errors in blobs' '
  72         (
  73                 cd bit-error &&
  74                 rm -f content.t &&
  75                 test_must_fail git read-tree --reset -u HEAD
  76         )
  77 '
  78
  79 test_expect_success 'read-tree -u detects missing objects' '
  80         (
  81                 cd missing &&
  82                 rm -f content.t &&
  83                 test_must_fail git read-tree --reset -u HEAD
  84         )
  85 '
  86
  87 # We use --bare to make sure that the transport detects it, not the checkout
  88 # phase.
  89 test_expect_success 'clone --no-local --bare detects corruption' '
  90         test_must_fail git clone --no-local --bare bit-error corrupt-transport
  91 '
  92
  93 test_expect_success 'clone --no-local --bare detects missing object' '
  94         test_must_fail git clone --no-local --bare missing missing-transport
  95 '
  96
  97 test_expect_success 'clone --no-local --bare detects misnamed object' '
  98         test_must_fail git clone --no-local --bare misnamed misnamed-transport
  99 '
 100
 101 # We do not expect --local to detect corruption at the transport layer,
 102 # so we are really checking the checkout() code path.
 103 test_expect_success 'clone --local detects corruption' '
 104         test_must_fail git clone --local bit-error corrupt-checkout
 105 '
 106
 107 test_expect_success 'error detected during checkout leaves repo intact' '
 108         test_path_is_dir corrupt-checkout/.git
 109 '
 110
 111 test_expect_success 'clone --local detects missing objects' '
 112         test_must_fail git clone --local missing missing-checkout
 113 '
 114
 115 test_expect_failure 'clone --local detects misnamed objects' '
 116         test_must_fail git clone --local misnamed misnamed-checkout
 117 '
 118
 119 test_expect_success 'fetch into corrupted repo with index-pack' '
 120         cp -R bit-error bit-error-cp &&
 121         test_when_finished "rm -rf bit-error-cp" &&
 122         (
 123                 cd bit-error-cp &&
 124                 test_must_fail git -c transfer.unpackLimit=1 \
 125                         fetch ../no-bit-error 2>stderr &&
 126                 test_i18ngrep ! -i collision stderr
 127         )
 128 '
 129
 130 test_expect_success 'internal tree objects are not "missing"' '
 131         git init missing-empty &&
 132         (
 133                 cd missing-empty &&
 134                 empty_tree=$(git hash-object -t tree /dev/null) &&
 135                 commit=$(echo foo | git commit-tree $empty_tree) &&
 136                 git rev-list --objects $commit
 137         )
 138 '
 139
 140 test_done