t/t5332-multi-pack-reuse.sh

   1 #!/bin/sh
   2
   3 test_description='pack-objects multi-pack reuse'
   4
   5 . ./test-lib.sh
   6 . "$TEST_DIRECTORY"/lib-bitmap.sh
   7
   8 objdir=.git/objects
   9 packdir=$objdir/pack
  10
  11 test_pack_reused () {
  12         test_trace2_data pack-objects pack-reused "$1"
  13 }
  14
  15 test_packs_reused () {
  16         test_trace2_data pack-objects packs-reused "$1"
  17 }
  18
  19
  20 # pack_position <object> </path/to/pack.idx
  21 pack_position () {
  22         git show-index >objects &&
  23         grep "$1" objects | cut -d" " -f1
  24 }
  25
  26 test_expect_success 'preferred pack is reused for single-pack reuse' '
  27         test_config pack.allowPackReuse single &&
  28
  29         for i in A B
  30         do
  31                 test_commit "$i" &&
  32                 git repack -d || return 1
  33         done &&
  34
  35         git multi-pack-index write --bitmap &&
  36
  37         : >trace2.txt &&
  38         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
  39                 git pack-objects --stdout --revs --all >/dev/null &&
  40
  41         test_pack_reused 3 <trace2.txt &&
  42         test_packs_reused 1 <trace2.txt
  43 '
  44
  45 test_expect_success 'enable multi-pack reuse' '
  46         git config pack.allowPackReuse multi
  47 '
  48
  49 test_expect_success 'reuse all objects from subset of bitmapped packs' '
  50         test_commit C &&
  51         git repack -d &&
  52
  53         git multi-pack-index write --bitmap &&
  54
  55         cat >in <<-EOF &&
  56         $(git rev-parse C)
  57         ^$(git rev-parse A)
  58         EOF
  59
  60         : >trace2.txt &&
  61         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
  62                 git pack-objects --stdout --revs <in >/dev/null &&
  63
  64         test_pack_reused 6 <trace2.txt &&
  65         test_packs_reused 2 <trace2.txt
  66 '
  67
  68 test_expect_success 'reuse all objects from all packs' '
  69         : >trace2.txt &&
  70         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
  71                 git pack-objects --stdout --revs --all >/dev/null &&
  72
  73         test_pack_reused 9 <trace2.txt &&
  74         test_packs_reused 3 <trace2.txt
  75 '
  76
  77 test_expect_success 'reuse objects from first pack with middle gap' '
  78         for i in D E F
  79         do
  80                 test_commit "$i" || return 1
  81         done &&
  82
  83         # Set "pack.window" to zero to ensure that we do not create any
  84         # deltas, which could alter the amount of pack reuse we perform
  85         # (if, for e.g., we are not sending one or more bases).
  86         D="$(git -c pack.window=0 pack-objects --all --unpacked $packdir/pack)" &&
  87
  88         d_pos="$(pack_position $(git rev-parse D) <$packdir/pack-$D.idx)" &&
  89         e_pos="$(pack_position $(git rev-parse E) <$packdir/pack-$D.idx)" &&
  90         f_pos="$(pack_position $(git rev-parse F) <$packdir/pack-$D.idx)" &&
  91
  92         # commits F, E, and D, should appear in that order at the
  93         # beginning of the pack
  94         test $f_pos -lt $e_pos &&
  95         test $e_pos -lt $d_pos &&
  96
  97         # Ensure that the pack we are constructing sorts ahead of any
  98         # other packs in lexical/bitmap order by choosing it as the
  99         # preferred pack.
 100         git multi-pack-index write --bitmap --preferred-pack="pack-$D.idx" &&
 101
 102         cat >in <<-EOF &&
 103         $(git rev-parse E)
 104         ^$(git rev-parse D)
 105         EOF
 106
 107         : >trace2.txt &&
 108         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
 109                 git pack-objects --stdout --delta-base-offset --revs <in >/dev/null &&
 110
 111         test_pack_reused 3 <trace2.txt &&
 112         test_packs_reused 1 <trace2.txt
 113 '
 114
 115 test_expect_success 'reuse objects from middle pack with middle gap' '
 116         rm -fr $packdir/multi-pack-index* &&
 117
 118         # Ensure that the pack we are constructing sort into any
 119         # position *but* the first one, by choosing a different pack as
 120         # the preferred one.
 121         git multi-pack-index write --bitmap --preferred-pack="pack-$A.idx" &&
 122
 123         cat >in <<-EOF &&
 124         $(git rev-parse E)
 125         ^$(git rev-parse D)
 126         EOF
 127
 128         : >trace2.txt &&
 129         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
 130                 git pack-objects --stdout --delta-base-offset --revs <in >/dev/null &&
 131
 132         test_pack_reused 3 <trace2.txt &&
 133         test_packs_reused 1 <trace2.txt
 134 '
 135
 136 test_expect_success 'omit delta with uninteresting base (same pack)' '
 137         git repack -adk &&
 138
 139         test_seq 32 >f &&
 140         git add f &&
 141         test_tick &&
 142         git commit -m "delta" &&
 143         delta="$(git rev-parse HEAD)" &&
 144
 145         test_seq 64 >f &&
 146         test_tick &&
 147         git commit -a -m "base" &&
 148         base="$(git rev-parse HEAD)" &&
 149
 150         test_commit other &&
 151
 152         git repack -d &&
 153
 154         have_delta "$(git rev-parse $delta:f)" "$(git rev-parse $base:f)" &&
 155
 156         git multi-pack-index write --bitmap &&
 157
 158         cat >in <<-EOF &&
 159         $(git rev-parse other)
 160         ^$base
 161         EOF
 162
 163         : >trace2.txt &&
 164         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
 165                 git pack-objects --stdout --delta-base-offset --revs <in >/dev/null &&
 166
 167         # We can only reuse the 3 objects corresponding to "other" from
 168         # the latest pack.
 169         #
 170         # This is because even though we want "delta", we do not want
 171         # "base", meaning that we have to inflate the delta/base-pair
 172         # corresponding to the blob in commit "delta", which bypasses
 173         # the pack-reuse mechanism.
 174         #
 175         # The remaining objects from the other pack are similarly not
 176         # reused because their objects are on the uninteresting side of
 177         # the query.
 178         test_pack_reused 3 <trace2.txt &&
 179         test_packs_reused 1 <trace2.txt
 180 '
 181
 182 test_expect_success 'omit delta from uninteresting base (cross pack)' '
 183         cat >in <<-EOF &&
 184         $(git rev-parse $base)
 185         ^$(git rev-parse $delta)
 186         EOF
 187
 188         P="$(git pack-objects --revs $packdir/pack <in)" &&
 189
 190         git multi-pack-index write --bitmap --preferred-pack="pack-$P.idx" &&
 191
 192         : >trace2.txt &&
 193         GIT_TRACE2_EVENT="$PWD/trace2.txt" \
 194                 git pack-objects --stdout --delta-base-offset --all >/dev/null &&
 195
 196         packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" &&
 197         objects_nr="$(git rev-list --count --all --objects)" &&
 198
 199         test_pack_reused $(($objects_nr - 1)) <trace2.txt &&
 200         test_packs_reused $packs_nr <trace2.txt
 201 '
 202
 203 test_done