| 1 | #!/bin/sh |
| 2 | |
| 3 | test_description='pack-objects multi-pack reuse' |
| 4 | |
| 5 | . ./test-lib.sh |
| 6 | . "$TEST_DIRECTORY"/lib-bitmap.sh |
| 7 | |
| 8 | GIT_TEST_MULTI_PACK_INDEX=0 |
| 9 | GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=0 |
| 10 | |
| 11 | # The --path-walk option does not consider the preferred pack |
| 12 | # at all for reusing deltas, so this variable changes the |
| 13 | # behavior of this test, if enabled. |
| 14 | GIT_TEST_PACK_PATH_WALK=0 |
| 15 | export GIT_TEST_PACK_PATH_WALK |
| 16 | |
| 17 | objdir=.git/objects |
| 18 | packdir=$objdir/pack |
| 19 | |
| 20 | test_pack_reused () { |
| 21 | test_trace2_data pack-objects pack-reused "$1" |
| 22 | } |
| 23 | |
| 24 | test_packs_reused () { |
| 25 | test_trace2_data pack-objects packs-reused "$1" |
| 26 | } |
| 27 | |
| 28 | |
| 29 | # pack_position <object> </path/to/pack.idx |
| 30 | pack_position () { |
| 31 | git show-index >objects && |
| 32 | grep "$1" objects | cut -d" " -f1 |
| 33 | } |
| 34 | |
| 35 | # test_pack_objects_reused_all <pack-reused> <packs-reused> |
| 36 | test_pack_objects_reused_all () { |
| 37 | : >trace2.txt && |
| 38 | GIT_TRACE2_EVENT="$PWD/trace2.txt" \ |
| 39 | git pack-objects --stdout --revs --all --delta-base-offset \ |
| 40 | >got.pack && |
| 41 | |
| 42 | test_pack_reused "$1" <trace2.txt && |
| 43 | test_packs_reused "$2" <trace2.txt && |
| 44 | |
| 45 | git index-pack --strict -o got.idx got.pack |
| 46 | } |
| 47 | |
| 48 | # test_pack_objects_reused <pack-reused> <packs-reused> |
| 49 | test_pack_objects_reused () { |
| 50 | : >trace2.txt && |
| 51 | GIT_TRACE2_EVENT="$PWD/trace2.txt" \ |
| 52 | git pack-objects --stdout --revs >got.pack && |
| 53 | |
| 54 | test_pack_reused "$1" <trace2.txt && |
| 55 | test_packs_reused "$2" <trace2.txt && |
| 56 | |
| 57 | git index-pack --strict -o got.idx got.pack |
| 58 | } |
| 59 | |
| 60 | test_expect_success 'preferred pack is reused for single-pack reuse' ' |
| 61 | test_config pack.allowPackReuse single && |
| 62 | git config set maintenance.auto false && |
| 63 | |
| 64 | for i in A B |
| 65 | do |
| 66 | test_commit "$i" && |
| 67 | git repack -d || return 1 |
| 68 | done && |
| 69 | |
| 70 | git multi-pack-index write --bitmap && |
| 71 | |
| 72 | test_pack_objects_reused_all 3 1 |
| 73 | ' |
| 74 | |
| 75 | test_expect_success 'multi-pack reuse is disabled by default' ' |
| 76 | test_pack_objects_reused_all 3 1 |
| 77 | ' |
| 78 | |
| 79 | test_expect_success 'feature.experimental implies multi-pack reuse' ' |
| 80 | test_config feature.experimental true && |
| 81 | |
| 82 | test_pack_objects_reused_all 6 2 |
| 83 | ' |
| 84 | |
| 85 | test_expect_success 'multi-pack reuse can be disabled with feature.experimental' ' |
| 86 | test_config feature.experimental true && |
| 87 | test_config pack.allowPackReuse single && |
| 88 | |
| 89 | test_pack_objects_reused_all 3 1 |
| 90 | ' |
| 91 | |
| 92 | test_expect_success 'enable multi-pack reuse' ' |
| 93 | git config pack.allowPackReuse multi |
| 94 | ' |
| 95 | |
| 96 | test_expect_success 'reuse all objects from subset of bitmapped packs' ' |
| 97 | test_commit C && |
| 98 | git repack -d && |
| 99 | |
| 100 | git multi-pack-index write --bitmap && |
| 101 | |
| 102 | cat >in <<-EOF && |
| 103 | $(git rev-parse C) |
| 104 | ^$(git rev-parse A) |
| 105 | EOF |
| 106 | |
| 107 | test_pack_objects_reused 6 2 <in |
| 108 | ' |
| 109 | |
| 110 | test_expect_success 'reuse all objects from all packs' ' |
| 111 | test_pack_objects_reused_all 9 3 |
| 112 | ' |
| 113 | |
| 114 | test_expect_success 'reuse objects from first pack with middle gap' ' |
| 115 | for i in D E F |
| 116 | do |
| 117 | test_commit "$i" || return 1 |
| 118 | done && |
| 119 | |
| 120 | # Set "pack.window" to zero to ensure that we do not create any |
| 121 | # deltas, which could alter the amount of pack reuse we perform |
| 122 | # (if, for e.g., we are not sending one or more bases). |
| 123 | D="$(git -c pack.window=0 pack-objects --all --unpacked $packdir/pack)" && |
| 124 | |
| 125 | d_pos="$(pack_position $(git rev-parse D) <$packdir/pack-$D.idx)" && |
| 126 | e_pos="$(pack_position $(git rev-parse E) <$packdir/pack-$D.idx)" && |
| 127 | f_pos="$(pack_position $(git rev-parse F) <$packdir/pack-$D.idx)" && |
| 128 | |
| 129 | # commits F, E, and D, should appear in that order at the |
| 130 | # beginning of the pack |
| 131 | test $f_pos -lt $e_pos && |
| 132 | test $e_pos -lt $d_pos && |
| 133 | |
| 134 | # Ensure that the pack we are constructing sorts ahead of any |
| 135 | # other packs in lexical/bitmap order by choosing it as the |
| 136 | # preferred pack. |
| 137 | git multi-pack-index write --bitmap --preferred-pack="pack-$D.idx" && |
| 138 | |
| 139 | cat >in <<-EOF && |
| 140 | $(git rev-parse E) |
| 141 | ^$(git rev-parse D) |
| 142 | EOF |
| 143 | |
| 144 | test_pack_objects_reused 3 1 <in |
| 145 | ' |
| 146 | |
| 147 | test_expect_success 'reuse objects from middle pack with middle gap' ' |
| 148 | rm -fr $packdir/multi-pack-index* && |
| 149 | |
| 150 | # Ensure that the pack we are constructing sort into any |
| 151 | # position *but* the first one, by choosing a different pack as |
| 152 | # the preferred one. |
| 153 | git multi-pack-index write --bitmap --preferred-pack="pack-$A.idx" && |
| 154 | |
| 155 | cat >in <<-EOF && |
| 156 | $(git rev-parse E) |
| 157 | ^$(git rev-parse D) |
| 158 | EOF |
| 159 | |
| 160 | test_pack_objects_reused 3 1 <in |
| 161 | ' |
| 162 | |
| 163 | test_expect_success 'omit delta with uninteresting base (same pack)' ' |
| 164 | git repack -adk && |
| 165 | |
| 166 | test_seq 32 >f && |
| 167 | git add f && |
| 168 | test_tick && |
| 169 | git commit -m "delta" && |
| 170 | delta="$(git rev-parse HEAD)" && |
| 171 | |
| 172 | test_seq 64 >f && |
| 173 | test_tick && |
| 174 | git commit -a -m "base" && |
| 175 | base="$(git rev-parse HEAD)" && |
| 176 | |
| 177 | test_commit other && |
| 178 | |
| 179 | git repack -d && |
| 180 | |
| 181 | have_delta "$(git rev-parse $delta:f)" "$(git rev-parse $base:f)" && |
| 182 | |
| 183 | git multi-pack-index write --bitmap && |
| 184 | |
| 185 | cat >in <<-EOF && |
| 186 | $(git rev-parse other) |
| 187 | ^$base |
| 188 | EOF |
| 189 | |
| 190 | # We can only reuse the 3 objects corresponding to "other" from |
| 191 | # the latest pack. |
| 192 | # |
| 193 | # This is because even though we want "delta", we do not want |
| 194 | # "base", meaning that we have to inflate the delta/base-pair |
| 195 | # corresponding to the blob in commit "delta", which bypasses |
| 196 | # the pack-reuse mechanism. |
| 197 | # |
| 198 | # The remaining objects from the other pack are similarly not |
| 199 | # reused because their objects are on the uninteresting side of |
| 200 | # the query. |
| 201 | test_pack_objects_reused 3 1 <in |
| 202 | ' |
| 203 | |
| 204 | test_expect_success 'omit delta from uninteresting base (cross pack)' ' |
| 205 | cat >in <<-EOF && |
| 206 | $(git rev-parse $base) |
| 207 | ^$(git rev-parse $delta) |
| 208 | EOF |
| 209 | |
| 210 | P="$(git pack-objects --revs $packdir/pack <in)" && |
| 211 | |
| 212 | git multi-pack-index write --bitmap --preferred-pack="pack-$P.idx" && |
| 213 | |
| 214 | packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" && |
| 215 | objects_nr="$(git rev-list --count --all --objects)" && |
| 216 | |
| 217 | test_pack_objects_reused_all $(($objects_nr - 1)) $packs_nr |
| 218 | ' |
| 219 | |
| 220 | test_expect_success 'non-omitted delta in MIDX preferred pack' ' |
| 221 | test_config pack.allowPackReuse single && |
| 222 | |
| 223 | cat >p1.objects <<-EOF && |
| 224 | $(git rev-parse $base) |
| 225 | ^$(git rev-parse $delta^) |
| 226 | EOF |
| 227 | cat >p2.objects <<-EOF && |
| 228 | $(git rev-parse F) |
| 229 | EOF |
| 230 | |
| 231 | p1="$(git pack-objects --revs $packdir/pack <p1.objects)" && |
| 232 | p2="$(git pack-objects --revs $packdir/pack <p2.objects)" && |
| 233 | |
| 234 | cat >in <<-EOF && |
| 235 | pack-$p1.idx |
| 236 | pack-$p2.idx |
| 237 | EOF |
| 238 | git multi-pack-index write --bitmap --stdin-packs \ |
| 239 | --preferred-pack=pack-$p1.pack <in && |
| 240 | |
| 241 | git show-index <$packdir/pack-$p1.idx >expect && |
| 242 | |
| 243 | test_pack_objects_reused_all $(wc -l <expect) 1 |
| 244 | ' |
| 245 | |
| 246 | test_expect_success 'duplicate objects' ' |
| 247 | git init duplicate-objects && |
| 248 | ( |
| 249 | cd duplicate-objects && |
| 250 | |
| 251 | git config pack.allowPackReuse multi && |
| 252 | |
| 253 | test_commit base && |
| 254 | |
| 255 | git repack -a && |
| 256 | |
| 257 | git rev-parse HEAD^{tree} >in && |
| 258 | p="$(git pack-objects $packdir/pack <in)" && |
| 259 | |
| 260 | git multi-pack-index write --bitmap --preferred-pack=pack-$p.idx && |
| 261 | |
| 262 | objects_nr="$(git rev-list --count --all --objects)" && |
| 263 | packs_nr="$(find $packdir -type f -name "pack-*.pack" | wc -l)" && |
| 264 | |
| 265 | test_pack_objects_reused_all $objects_nr $packs_nr |
| 266 | ) |
| 267 | ' |
| 268 | |
| 269 | test_expect_success 'duplicate objects with verbatim reuse' ' |
| 270 | git init duplicate-objects-verbatim && |
| 271 | ( |
| 272 | cd duplicate-objects-verbatim && |
| 273 | |
| 274 | git config pack.allowPackReuse multi && |
| 275 | |
| 276 | test_commit_bulk 64 && |
| 277 | |
| 278 | # take the first object from the main pack... |
| 279 | git show-index <$(ls $packdir/pack-*.idx) >obj.raw && |
| 280 | sort -nk1 <obj.raw | head -n1 | cut -d" " -f2 >in && |
| 281 | |
| 282 | # ...and create a separate pack containing just that object |
| 283 | p="$(git pack-objects $packdir/pack <in)" && |
| 284 | |
| 285 | git multi-pack-index write --bitmap --preferred-pack=pack-$p.idx && |
| 286 | |
| 287 | test_pack_objects_reused_all 192 2 |
| 288 | ) |
| 289 | ' |
| 290 | |
| 291 | test_done |