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-${pack2}.idx" "2.idx"'
  67
  68test_expect_success 'index-pack --verify on index version 1' '
  69        git index-pack --verify "test-1-${pack1}.pack"
  70'
  71
  72test_expect_success 'index-pack --verify on index version 2' '
  73        git index-pack --verify "test-2-${pack2}.pack"
  74'
  75
  76test_expect_success \
  77    'pack-objects --index-version=2, is not accepted' \
  78    'test_must_fail git pack-objects --index-version=2, test-3 <obj-list'
  79
  80test_expect_success \
  81    'index v2: force some 64-bit offsets with pack-objects' \
  82    'pack3=$(git pack-objects --index-version=2,0x40000 test-3 <obj-list)'
  83
  84if msg=$(git verify-pack -v "test-3-${pack3}.pack" 2>&1) ||
  85        ! (echo "$msg" | grep "pack too large .* off_t")
  86then
  87        test_set_prereq OFF64_T
  88else
  89        say "# skipping tests concerning 64-bit offsets"
  90fi
  91
  92test_expect_success OFF64_T \
  93    'index v2: verify a pack with some 64-bit offsets' \
  94    'git verify-pack -v "test-3-${pack3}.pack"'
  95
  96test_expect_success OFF64_T \
  97    '64-bit offsets: should be different from previous index v2 results' \
  98    '! cmp "test-2-${pack2}.idx" "test-3-${pack3}.idx"'
  99
 100test_expect_success OFF64_T \
 101    'index v2: force some 64-bit offsets with index-pack' \
 102    'git index-pack --index-version=2,0x40000 -o 3.idx "test-1-${pack1}.pack"'
 103
 104test_expect_success OFF64_T \
 105    '64-bit offsets: index-pack result should match pack-objects one' \
 106    'cmp "test-3-${pack3}.idx" "3.idx"'
 107
 108test_expect_success OFF64_T 'index-pack --verify on 64-bit offset v2 (cheat)' '
 109        # This cheats by knowing which lower offset should still be encoded
 110        # in 64-bit representation.
 111        git index-pack --verify --index-version=2,0x40000 "test-3-${pack3}.pack"
 112'
 113
 114test_expect_success OFF64_T 'index-pack --verify on 64-bit offset v2' '
 115        git index-pack --verify "test-3-${pack3}.pack"
 116'
 117
 118# returns the object number for given object in given pack index
 119index_obj_nr()
 120{
 121    idx_file=$1
 122    object_sha1=$2
 123    nr=0
 124    git show-index < $idx_file |
 125    while read offs sha1 extra
 126    do
 127      nr=$(($nr + 1))
 128      test "$sha1" = "$object_sha1" || continue
 129      echo "$(($nr - 1))"
 130      break
 131    done
 132}
 133
 134# returns the pack offset for given object as found in given pack index
 135index_obj_offset()
 136{
 137    idx_file=$1
 138    object_sha1=$2
 139    git show-index < $idx_file | grep $object_sha1 |
 140    ( read offs extra && echo "$offs" )
 141}
 142
 143test_expect_success \
 144    '[index v1] 1) stream pack to repository' \
 145    'git index-pack --index-version=1 --stdin < "test-1-${pack1}.pack" &&
 146     git prune-packed &&
 147     git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 148     cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 149     cmp "test-1-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 150
 151test_expect_success \
 152    '[index v1] 2) create a stealth corruption in a delta base reference' \
 153    '# This test assumes file_101 is a delta smaller than 16 bytes.
 154     # It should be against file_100 but we substitute its base for file_099
 155     sha1_101=`git hash-object file_101` &&
 156     sha1_099=`git hash-object file_099` &&
 157     offs_101=`index_obj_offset 1.idx $sha1_101` &&
 158     nr_099=`index_obj_nr 1.idx $sha1_099` &&
 159     chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 160     dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 161        if=".git/objects/pack/pack-${pack1}.idx" \
 162        skip=$((4 + 256 * 4 + $nr_099 * 24)) \
 163        bs=1 count=20 conv=notrunc &&
 164     git cat-file blob $sha1_101 > file_101_foo1'
 165
 166test_expect_success \
 167    '[index v1] 3) corrupted delta happily returned wrong data' \
 168    'test -f file_101_foo1 && ! cmp file_101 file_101_foo1'
 169
 170test_expect_success \
 171    '[index v1] 4) confirm that the pack is actually corrupted' \
 172    'test_must_fail git fsck --full $commit'
 173
 174test_expect_success \
 175    '[index v1] 5) pack-objects happily reuses corrupted data' \
 176    'pack4=$(git pack-objects test-4 <obj-list) &&
 177     test -f "test-4-${pack1}.pack"'
 178
 179test_expect_success \
 180    '[index v1] 6) newly created pack is BAD !' \
 181    'test_must_fail git verify-pack -v "test-4-${pack1}.pack"'
 182
 183test_expect_success \
 184    '[index v2] 1) stream pack to repository' \
 185    'rm -f .git/objects/pack/* &&
 186     git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 187     git prune-packed &&
 188     git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 189     cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 190     cmp "test-2-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 191
 192test_expect_success \
 193    '[index v2] 2) create a stealth corruption in a delta base reference' \
 194    '# This test assumes file_101 is a delta smaller than 16 bytes.
 195     # It should be against file_100 but we substitute its base for file_099
 196     sha1_101=`git hash-object file_101` &&
 197     sha1_099=`git hash-object file_099` &&
 198     offs_101=`index_obj_offset 1.idx $sha1_101` &&
 199     nr_099=`index_obj_nr 1.idx $sha1_099` &&
 200     chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 201     dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 202        if=".git/objects/pack/pack-${pack1}.idx" \
 203        skip=$((8 + 256 * 4 + $nr_099 * 20)) \
 204        bs=1 count=20 conv=notrunc &&
 205     git cat-file blob $sha1_101 > file_101_foo2'
 206
 207test_expect_success \
 208    '[index v2] 3) corrupted delta happily returned wrong data' \
 209    'test -f file_101_foo2 && ! cmp file_101 file_101_foo2'
 210
 211test_expect_success \
 212    '[index v2] 4) confirm that the pack is actually corrupted' \
 213    'test_must_fail git fsck --full $commit'
 214
 215test_expect_success \
 216    '[index v2] 5) pack-objects refuses to reuse corrupted data' \
 217    'test_must_fail git pack-objects test-5 <obj-list &&
 218     test_must_fail git pack-objects --no-reuse-object test-6 <obj-list'
 219
 220test_expect_success \
 221    '[index v2] 6) verify-pack detects CRC mismatch' \
 222    'rm -f .git/objects/pack/* &&
 223     git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 224     git verify-pack ".git/objects/pack/pack-${pack1}.pack" &&
 225     obj=`git hash-object file_001` &&
 226     nr=`index_obj_nr ".git/objects/pack/pack-${pack1}.idx" $obj` &&
 227     chmod +w ".git/objects/pack/pack-${pack1}.idx" &&
 228     printf xxxx | dd of=".git/objects/pack/pack-${pack1}.idx" conv=notrunc \
 229        bs=1 count=4 seek=$((8 + 256 * 4 + `wc -l <obj-list` * 20 + $nr * 4)) &&
 230     ( while read obj
 231       do git cat-file -p $obj >/dev/null || exit 1
 232       done <obj-list ) &&
 233     test_must_fail git verify-pack ".git/objects/pack/pack-${pack1}.pack"
 234'
 235
 236test_expect_success 'running index-pack in the object store' '
 237    rm -f .git/objects/pack/* &&
 238    cp test-1-${pack1}.pack .git/objects/pack/pack-${pack1}.pack &&
 239    (
 240        cd .git/objects/pack
 241        git index-pack pack-${pack1}.pack
 242    ) &&
 243    test -f .git/objects/pack/pack-${pack1}.idx
 244'
 245
 246test_done