t/t5332-multi-pack-reuse.sh

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