t/t5302-pack-index.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2007 Nicolas Pitre
   4 #
   5
   6 test_description='pack index with 64-bit offsets and object CRC'
   7 . ./test-lib.sh
   8
   9 test_expect_success \
  10     'setup' \
  11     'rm -rf .git &&
  12      git init &&
  13      git config pack.threads 1 &&
  14      i=1 &&
  15      while test $i -le 100
  16      do
  17          iii=`printf '%03i' $i`
  18          test-genrandom "bar" 200 > wide_delta_$iii &&
  19          test-genrandom "baz $iii" 50 >> wide_delta_$iii &&
  20          test-genrandom "foo"$i 100 > deep_delta_$iii &&
  21          test-genrandom "foo"`expr $i + 1` 100 >> deep_delta_$iii &&
  22          test-genrandom "foo"`expr $i + 2` 100 >> deep_delta_$iii &&
  23          echo $iii >file_$iii &&
  24          test-genrandom "$iii" 8192 >>file_$iii &&
  25          git update-index --add file_$iii deep_delta_$iii wide_delta_$iii &&
  26          i=`expr $i + 1` || return 1
  27      done &&
  28      { echo 101 && test-genrandom 100 8192; } >file_101 &&
  29      git update-index --add file_101 &&
  30      tree=`git write-tree` &&
  31      commit=`git commit-tree $tree </dev/null` && {
  32          echo $tree &&
  33          git ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\)       .*/\\1/"
  34      } >obj-list &&
  35      git update-ref HEAD $commit'
  36
  37 test_expect_success \
  38     'pack-objects with index version 1' \
  39     'pack1=$(git pack-objects --index-version=1 test-1 <obj-list) &&
  40      git verify-pack -v "test-1-${pack1}.pack"'
  41
  42 test_expect_success \
  43     'pack-objects with index version 2' \
  44     'pack2=$(git pack-objects --index-version=2 test-2 <obj-list) &&
  45      git verify-pack -v "test-2-${pack2}.pack"'
  46
  47 test_expect_success \
  48     'both packs should be identical' \
  49     'cmp "test-1-${pack1}.pack" "test-2-${pack2}.pack"'
  50
  51 test_expect_success \
  52     'index v1 and index v2 should be different' \
  53     '! cmp "test-1-${pack1}.idx" "test-2-${pack2}.idx"'
  54
  55 test_expect_success \
  56     'index-pack with index version 1' \
  57     'git index-pack --index-version=1 -o 1.idx "test-1-${pack1}.pack"'
  58
  59 test_expect_success \
  60     'index-pack with index version 2' \
  61     'git index-pack --index-version=2 -o 2.idx "test-1-${pack1}.pack"'
  62
  63 test_expect_success \
  64     'index-pack results should match pack-objects ones' \
  65     'cmp "test-1-${pack1}.idx" "1.idx" &&
  66      cmp "test-2-${pack2}.idx" "2.idx"'
  67
  68 test_expect_success \
  69     'index v2: force some 64-bit offsets with pack-objects' \
  70     'pack3=$(git pack-objects --index-version=2,0x40000 test-3 <obj-list)'
  71
  72 if msg=$(git verify-pack -v "test-3-${pack3}.pack" 2>&1) ||
  73         ! (echo "$msg" | grep "pack too large .* off_t")
  74 then
  75         test_set_prereq OFF64_T
  76 else
  77         say "# skipping tests concerning 64-bit offsets"
  78 fi
  79
  80 test_expect_success OFF64_T \
  81     'index v2: verify a pack with some 64-bit offsets' \
  82     'git verify-pack -v "test-3-${pack3}.pack"'
  83
  84 test_expect_success OFF64_T \
  85     '64-bit offsets: should be different from previous index v2 results' \
  86     '! cmp "test-2-${pack2}.idx" "test-3-${pack3}.idx"'
  87
  88 test_expect_success OFF64_T \
  89     'index v2: force some 64-bit offsets with index-pack' \
  90     'git index-pack --index-version=2,0x40000 -o 3.idx "test-1-${pack1}.pack"'
  91
  92 test_expect_success OFF64_T \
  93     '64-bit offsets: index-pack result should match pack-objects one' \
  94     'cmp "test-3-${pack3}.idx" "3.idx"'
  95
  96 # returns the object number for given object in given pack index
  97 index_obj_nr()
  98 {
  99     idx_file=$1
 100     object_sha1=$2
 101     nr=0
 102     git show-index < $idx_file |
 103     while read offs sha1 extra
 104     do
 105       nr=$(($nr + 1))
 106       test "$sha1" = "$object_sha1" || continue
 107       echo "$(($nr - 1))"
 108       break
 109     done
 110 }
 111
 112 # returns the pack offset for given object as found in given pack index
 113 index_obj_offset()
 114 {
 115     idx_file=$1
 116     object_sha1=$2
 117     git show-index < $idx_file | grep $object_sha1 |
 118     ( read offs extra && echo "$offs" )
 119 }
 120
 121 test_expect_success \
 122     '[index v1] 1) stream pack to repository' \
 123     'git index-pack --index-version=1 --stdin < "test-1-${pack1}.pack" &&
 124      git prune-packed &&
 125      git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 126      cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 127      cmp "test-1-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 128
 129 test_expect_success \
 130     '[index v1] 2) create a stealth corruption in a delta base reference' \
 131     '# This test assumes file_101 is a delta smaller than 16 bytes.
 132      # It should be against file_100 but we substitute its base for file_099
 133      sha1_101=`git hash-object file_101` &&
 134      sha1_099=`git hash-object file_099` &&
 135      offs_101=`index_obj_offset 1.idx $sha1_101` &&
 136      nr_099=`index_obj_nr 1.idx $sha1_099` &&
 137      chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 138      dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 139         if=".git/objects/pack/pack-${pack1}.idx" \
 140         skip=$((4 + 256 * 4 + $nr_099 * 24)) \
 141         bs=1 count=20 conv=notrunc &&
 142      git cat-file blob $sha1_101 > file_101_foo1'
 143
 144 test_expect_success \
 145     '[index v1] 3) corrupted delta happily returned wrong data' \
 146     'test -f file_101_foo1 && ! cmp file_101 file_101_foo1'
 147
 148 test_expect_success \
 149     '[index v1] 4) confirm that the pack is actually corrupted' \
 150     'test_must_fail git fsck --full $commit'
 151
 152 test_expect_success \
 153     '[index v1] 5) pack-objects happily reuses corrupted data' \
 154     'pack4=$(git pack-objects test-4 <obj-list) &&
 155      test -f "test-4-${pack1}.pack"'
 156
 157 test_expect_success \
 158     '[index v1] 6) newly created pack is BAD !' \
 159     'test_must_fail git verify-pack -v "test-4-${pack1}.pack"'
 160
 161 test_expect_success \
 162     '[index v2] 1) stream pack to repository' \
 163     'rm -f .git/objects/pack/* &&
 164      git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 165      git prune-packed &&
 166      git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 167      cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 168      cmp "test-2-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 169
 170 test_expect_success \
 171     '[index v2] 2) create a stealth corruption in a delta base reference' \
 172     '# This test assumes file_101 is a delta smaller than 16 bytes.
 173      # It should be against file_100 but we substitute its base for file_099
 174      sha1_101=`git hash-object file_101` &&
 175      sha1_099=`git hash-object file_099` &&
 176      offs_101=`index_obj_offset 1.idx $sha1_101` &&
 177      nr_099=`index_obj_nr 1.idx $sha1_099` &&
 178      chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 179      dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 180         if=".git/objects/pack/pack-${pack1}.idx" \
 181         skip=$((8 + 256 * 4 + $nr_099 * 20)) \
 182         bs=1 count=20 conv=notrunc &&
 183      git cat-file blob $sha1_101 > file_101_foo2'
 184
 185 test_expect_success \
 186     '[index v2] 3) corrupted delta happily returned wrong data' \
 187     'test -f file_101_foo2 && ! cmp file_101 file_101_foo2'
 188
 189 test_expect_success \
 190     '[index v2] 4) confirm that the pack is actually corrupted' \
 191     'test_must_fail git fsck --full $commit'
 192
 193 test_expect_success \
 194     '[index v2] 5) pack-objects refuses to reuse corrupted data' \
 195     'test_must_fail git pack-objects test-5 <obj-list &&
 196      test_must_fail git pack-objects --no-reuse-object test-6 <obj-list'
 197
 198 test_expect_success \
 199     '[index v2] 6) verify-pack detects CRC mismatch' \
 200     'rm -f .git/objects/pack/* &&
 201      git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 202      git verify-pack ".git/objects/pack/pack-${pack1}.pack" &&
 203      obj=`git hash-object file_001` &&
 204      nr=`index_obj_nr ".git/objects/pack/pack-${pack1}.idx" $obj` &&
 205      chmod +w ".git/objects/pack/pack-${pack1}.idx" &&
 206      printf xxxx | dd of=".git/objects/pack/pack-${pack1}.idx" conv=notrunc \
 207         bs=1 count=4 seek=$((8 + 256 * 4 + `wc -l <obj-list` * 20 + $nr * 4)) &&
 208      ( while read obj
 209        do git cat-file -p $obj >/dev/null || exit 1
 210        done <obj-list ) &&
 211      err=$(test_must_fail git verify-pack \
 212        ".git/objects/pack/pack-${pack1}.pack" 2>&1) &&
 213      echo "$err" | grep "CRC mismatch"'
 214
 215 test_expect_success 'running index-pack in the object store' '
 216     rm -f .git/objects/pack/* &&
 217     cp test-1-${pack1}.pack .git/objects/pack/pack-${pack1}.pack &&
 218     (
 219         cd .git/objects/pack
 220         git index-pack pack-${pack1}.pack
 221     ) &&
 222     test -f .git/objects/pack/pack-${pack1}.idx
 223 '
 224
 225 test_done