Andrew's git - gitweb.git/blob - t/t5302-pack-index.sh

   1#!/bin/sh
   2#
   3# Copyright (c) 2007 Nicolas Pitre
   4#
   5
   6test_description='pack index with 64-bit offsets and object CRC'
   7. ./test-lib.sh
   8
   9test_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 $commit'
  36
  37test_expect_success \
  38    'pack-objects with index version 1' \
  39    'pack1=$(git pack-objects --index-version=1 test-1 <obj-list) &&
  40     git verify-pack -v "test-1-${pack1}.pack"'
  41
  42test_expect_success \
  43    'pack-objects with index version 2' \
  44    'pack2=$(git pack-objects --index-version=2 test-2 <obj-list) &&
  45     git verify-pack -v "test-2-${pack2}.pack"'
  46
  47test_expect_success \
  48    'both packs should be identical' \
  49    'cmp "test-1-${pack1}.pack" "test-2-${pack2}.pack"'
  50
  51test_expect_success \
  52    'index v1 and index v2 should be different' \
  53    '! cmp "test-1-${pack1}.idx" "test-2-${pack2}.idx"'
  54
  55test_expect_success \
  56    'index-pack with index version 1' \
  57    'git index-pack --index-version=1 -o 1.idx "test-1-${pack1}.pack"'
  58
  59test_expect_success \
  60    'index-pack with index version 2' \
  61    'git index-pack --index-version=2 -o 2.idx "test-1-${pack1}.pack"'
  62
  63test_expect_success \
  64    'index-pack results should match pack-objects ones' \
  65    'cmp "test-1-${pack1}.idx" "1.idx" &&
  66     cmp "test-2-${pack2}.idx" "2.idx"'
  67
  68test_expect_success \
  69    'index v2: force some 64-bit offsets with pack-objects' \
  70    'pack3=$(git pack-objects --index-version=2,0x40000 test-3 <obj-list)'
  71
  72if msg=$(git verify-pack -v "test-3-${pack3}.pack" 2>&1) ||
  73        ! (echo "$msg" | grep "pack too large .* off_t")
  74then
  75        test_set_prereq OFF64_T
  76else
  77        say "skipping tests concerning 64-bit offsets"
  78fi
  79
  80test_expect_success OFF64_T \
  81    'index v2: verify a pack with some 64-bit offsets' \
  82    'git verify-pack -v "test-3-${pack3}.pack"'
  83
  84test_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
  88test_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-${pack1}.pack"'
  91
  92test_expect_success OFF64_T \
  93    '64-bit offsets: index-pack result should match pack-objects one' \
  94    'cmp "test-3-${pack3}.idx" "3.idx"'
  95
  96# returns the object number for given object in given pack index
  97index_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
 113index_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
 121test_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
 129test_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
 144test_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
 148test_expect_success \
 149    '[index v1] 4) confirm that the pack is actually corrupted' \
 150    'test_must_fail git fsck --full $commit'
 151
 152test_expect_success \
 153    '[index v1] 5) pack-objects happily reuses corrupted data' \
 154    'pack4=$(git pack-objects test-4 <obj-list) &&
 155     test -f "test-4-${pack1}.pack"'
 156
 157test_expect_success \
 158    '[index v1] 6) newly created pack is BAD !' \
 159    'test_must_fail git verify-pack -v "test-4-${pack1}.pack"'
 160
 161test_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
 170test_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
 185test_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
 189test_expect_success \
 190    '[index v2] 4) confirm that the pack is actually corrupted' \
 191    'test_must_fail git fsck --full $commit'
 192
 193test_expect_success \
 194    '[index v2] 5) pack-objects refuses to reuse corrupted data' \
 195    'test_must_fail git pack-objects test-5 <obj-list &&
 196     test_must_fail git pack-objects --no-reuse-object test-6 <obj-list'
 197
 198test_expect_success \
 199    '[index v2] 6) verify-pack detects CRC mismatch' \
 200    'rm -f .git/objects/pack/* &&
 201     git index-pack --index-version=2 --stdin < "test-1-${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
 215test_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
 225test_done