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
  72have_64bits=
  73if msg=$(git verify-pack -v "test-3-${pack3}.pack" 2>&1) ||
  74        ! (echo "$msg" | grep "pack too large .* off_t")
  75then
  76        have_64bits=t
  77else
  78        say "skipping tests concerning 64-bit offsets"
  79fi
  80
  81test "$have_64bits" &&
  82test_expect_success \
  83    'index v2: verify a pack with some 64-bit offsets' \
  84    'git verify-pack -v "test-3-${pack3}.pack"'
  85
  86test "$have_64bits" &&
  87test_expect_success \
  88    '64-bit offsets: should be different from previous index v2 results' \
  89    '! cmp "test-2-${pack2}.idx" "test-3-${pack3}.idx"'
  90
  91test "$have_64bits" &&
  92test_expect_success \
  93    'index v2: force some 64-bit offsets with index-pack' \
  94    'git index-pack --index-version=2,0x40000 -o 3.idx "test-1-${pack1}.pack"'
  95
  96test "$have_64bits" &&
  97test_expect_success \
  98    '64-bit offsets: index-pack result should match pack-objects one' \
  99    'cmp "test-3-${pack3}.idx" "3.idx"'
 100
 101# returns the object number for given object in given pack index
 102index_obj_nr()
 103{
 104    idx_file=$1
 105    object_sha1=$2
 106    nr=0
 107    git show-index < $idx_file |
 108    while read offs sha1 extra
 109    do
 110      nr=$(($nr + 1))
 111      test "$sha1" = "$object_sha1" || continue
 112      echo "$(($nr - 1))"
 113      break
 114    done
 115}
 116
 117# returns the pack offset for given object as found in given pack index
 118index_obj_offset()
 119{
 120    idx_file=$1
 121    object_sha1=$2
 122    git show-index < $idx_file | grep $object_sha1 |
 123    ( read offs extra && echo "$offs" )
 124}
 125
 126test_expect_success \
 127    '[index v1] 1) stream pack to repository' \
 128    'git index-pack --index-version=1 --stdin < "test-1-${pack1}.pack" &&
 129     git prune-packed &&
 130     git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 131     cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 132     cmp "test-1-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 133
 134test_expect_success \
 135    '[index v1] 2) create a stealth corruption in a delta base reference' \
 136    '# This test assumes file_101 is a delta smaller than 16 bytes.
 137     # It should be against file_100 but we substitute its base for file_099
 138     sha1_101=`git hash-object file_101` &&
 139     sha1_099=`git hash-object file_099` &&
 140     offs_101=`index_obj_offset 1.idx $sha1_101` &&
 141     nr_099=`index_obj_nr 1.idx $sha1_099` &&
 142     chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 143     dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 144        if=".git/objects/pack/pack-${pack1}.idx" \
 145        skip=$((4 + 256 * 4 + $nr_099 * 24)) \
 146        bs=1 count=20 conv=notrunc &&
 147     git cat-file blob $sha1_101 > file_101_foo1'
 148
 149test_expect_success \
 150    '[index v1] 3) corrupted delta happily returned wrong data' \
 151    'test -f file_101_foo1 && ! cmp file_101 file_101_foo1'
 152
 153test_expect_success \
 154    '[index v1] 4) confirm that the pack is actually corrupted' \
 155    'test_must_fail git fsck --full $commit'
 156
 157test_expect_success \
 158    '[index v1] 5) pack-objects happily reuses corrupted data' \
 159    'pack4=$(git pack-objects test-4 <obj-list) &&
 160     test -f "test-4-${pack1}.pack"'
 161
 162test_expect_success \
 163    '[index v1] 6) newly created pack is BAD !' \
 164    'test_must_fail git verify-pack -v "test-4-${pack1}.pack"'
 165
 166test_expect_success \
 167    '[index v2] 1) stream pack to repository' \
 168    'rm -f .git/objects/pack/* &&
 169     git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 170     git prune-packed &&
 171     git count-objects | ( read nr rest && test "$nr" -eq 1 ) &&
 172     cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
 173     cmp "test-2-${pack1}.idx"  ".git/objects/pack/pack-${pack1}.idx"'
 174
 175test_expect_success \
 176    '[index v2] 2) create a stealth corruption in a delta base reference' \
 177    '# This test assumes file_101 is a delta smaller than 16 bytes.
 178     # It should be against file_100 but we substitute its base for file_099
 179     sha1_101=`git hash-object file_101` &&
 180     sha1_099=`git hash-object file_099` &&
 181     offs_101=`index_obj_offset 1.idx $sha1_101` &&
 182     nr_099=`index_obj_nr 1.idx $sha1_099` &&
 183     chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
 184     dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
 185        if=".git/objects/pack/pack-${pack1}.idx" \
 186        skip=$((8 + 256 * 4 + $nr_099 * 20)) \
 187        bs=1 count=20 conv=notrunc &&
 188     git cat-file blob $sha1_101 > file_101_foo2'
 189
 190test_expect_success \
 191    '[index v2] 3) corrupted delta happily returned wrong data' \
 192    'test -f file_101_foo2 && ! cmp file_101 file_101_foo2'
 193
 194test_expect_success \
 195    '[index v2] 4) confirm that the pack is actually corrupted' \
 196    'test_must_fail git fsck --full $commit'
 197
 198test_expect_success \
 199    '[index v2] 5) pack-objects refuses to reuse corrupted data' \
 200    'test_must_fail git pack-objects test-5 <obj-list &&
 201     test_must_fail git pack-objects --no-reuse-object test-6 <obj-list'
 202
 203test_expect_success \
 204    '[index v2] 6) verify-pack detects CRC mismatch' \
 205    'rm -f .git/objects/pack/* &&
 206     git index-pack --index-version=2 --stdin < "test-1-${pack1}.pack" &&
 207     git verify-pack ".git/objects/pack/pack-${pack1}.pack" &&
 208     obj=`git hash-object file_001` &&
 209     nr=`index_obj_nr ".git/objects/pack/pack-${pack1}.idx" $obj` &&
 210     chmod +w ".git/objects/pack/pack-${pack1}.idx" &&
 211     dd if=/dev/zero of=".git/objects/pack/pack-${pack1}.idx" conv=notrunc \
 212        bs=1 count=4 seek=$((8 + 256 * 4 + `wc -l <obj-list` * 20 + $nr * 4)) &&
 213     ( while read obj
 214       do git cat-file -p $obj >/dev/null || exit 1
 215       done <obj-list ) &&
 216     err=$(test_must_fail git verify-pack \
 217       ".git/objects/pack/pack-${pack1}.pack" 2>&1) &&
 218     echo "$err" | grep "CRC mismatch"'
 219
 220test_expect_success 'running index-pack in the object store' '
 221    rm -f .git/objects/pack/* &&
 222    cp test-1-${pack1}.pack .git/objects/pack/pack-${pack1}.pack &&
 223    (
 224        cd .git/objects/pack
 225        git index-pack pack-${pack1}.pack
 226    ) &&
 227    test -f .git/objects/pack/pack-${pack1}.idx
 228'
 229
 230test_done