t/t5310-pack-bitmaps.sh

   1 #!/bin/sh
   2
   3 test_description='exercise basic bitmap functionality'
   4 . ./test-lib.sh
   5
   6 objpath () {
   7         echo ".git/objects/$(echo "$1" | sed -e 's|\(..\)|\1/|')"
   8 }
   9
  10 # show objects present in pack ($1 should be associated *.idx)
  11 list_packed_objects () {
  12         git show-index <"$1" >object-list &&
  13         cut -d' ' -f2 object-list
  14 }
  15
  16 # has_any pattern-file content-file
  17 # tests whether content-file has any entry from pattern-file with entries being
  18 # whole lines.
  19 has_any () {
  20         grep -Ff "$1" "$2"
  21 }
  22
  23 test_expect_success 'setup repo with moderate-sized history' '
  24         for i in $(test_seq 1 10)
  25         do
  26                 test_commit $i
  27         done &&
  28         git checkout -b other HEAD~5 &&
  29         for i in $(test_seq 1 10)
  30         do
  31                 test_commit side-$i
  32         done &&
  33         git checkout master &&
  34         bitmaptip=$(git rev-parse master) &&
  35         blob=$(echo tagged-blob | git hash-object -w --stdin) &&
  36         git tag tagged-blob $blob &&
  37         git config repack.writebitmaps true
  38 '
  39
  40 test_expect_success 'full repack creates bitmaps' '
  41         git repack -ad &&
  42         ls .git/objects/pack/ | grep bitmap >output &&
  43         test_line_count = 1 output
  44 '
  45
  46 test_expect_success 'rev-list --test-bitmap verifies bitmaps' '
  47         git rev-list --test-bitmap HEAD
  48 '
  49
  50 rev_list_tests() {
  51         state=$1
  52
  53         test_expect_success "counting commits via bitmap ($state)" '
  54                 git rev-list --count HEAD >expect &&
  55                 git rev-list --use-bitmap-index --count HEAD >actual &&
  56                 test_cmp expect actual
  57         '
  58
  59         test_expect_success "counting partial commits via bitmap ($state)" '
  60                 git rev-list --count HEAD~5..HEAD >expect &&
  61                 git rev-list --use-bitmap-index --count HEAD~5..HEAD >actual &&
  62                 test_cmp expect actual
  63         '
  64
  65         test_expect_success "counting commits with limit ($state)" '
  66                 git rev-list --count -n 1 HEAD >expect &&
  67                 git rev-list --use-bitmap-index --count -n 1 HEAD >actual &&
  68                 test_cmp expect actual
  69         '
  70
  71         test_expect_success "counting non-linear history ($state)" '
  72                 git rev-list --count other...master >expect &&
  73                 git rev-list --use-bitmap-index --count other...master >actual &&
  74                 test_cmp expect actual
  75         '
  76
  77         test_expect_success "counting commits with limiting ($state)" '
  78                 git rev-list --count HEAD -- 1.t >expect &&
  79                 git rev-list --use-bitmap-index --count HEAD -- 1.t >actual &&
  80                 test_cmp expect actual
  81         '
  82
  83         test_expect_success "enumerate --objects ($state)" '
  84                 git rev-list --objects --use-bitmap-index HEAD >tmp &&
  85                 cut -d" " -f1 <tmp >tmp2 &&
  86                 sort <tmp2 >actual &&
  87                 git rev-list --objects HEAD >tmp &&
  88                 cut -d" " -f1 <tmp >tmp2 &&
  89                 sort <tmp2 >expect &&
  90                 test_cmp expect actual
  91         '
  92
  93         test_expect_success "bitmap --objects handles non-commit objects ($state)" '
  94                 git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
  95                 grep $blob actual
  96         '
  97 }
  98
  99 rev_list_tests 'full bitmap'
 100
 101 test_expect_success 'clone from bitmapped repository' '
 102         git clone --no-local --bare . clone.git &&
 103         git rev-parse HEAD >expect &&
 104         git --git-dir=clone.git rev-parse HEAD >actual &&
 105         test_cmp expect actual
 106 '
 107
 108 test_expect_success 'setup further non-bitmapped commits' '
 109         for i in $(test_seq 1 10)
 110         do
 111                 test_commit further-$i
 112         done
 113 '
 114
 115 rev_list_tests 'partial bitmap'
 116
 117 test_expect_success 'fetch (partial bitmap)' '
 118         git --git-dir=clone.git fetch origin master:master &&
 119         git rev-parse HEAD >expect &&
 120         git --git-dir=clone.git rev-parse HEAD >actual &&
 121         test_cmp expect actual
 122 '
 123
 124 test_expect_success 'incremental repack fails when bitmaps are requested' '
 125         test_commit more-1 &&
 126         test_must_fail git repack -d 2>err &&
 127         test_i18ngrep "Incremental repacks are incompatible with bitmap" err
 128 '
 129
 130 test_expect_success 'incremental repack can disable bitmaps' '
 131         test_commit more-2 &&
 132         git repack -d --no-write-bitmap-index
 133 '
 134
 135 test_expect_success 'pack-objects respects --local (non-local loose)' '
 136         git init --bare alt.git &&
 137         echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
 138         echo content1 >file1 &&
 139         # non-local loose object which is not present in bitmapped pack
 140         altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
 141         # non-local loose object which is also present in bitmapped pack
 142         git cat-file blob $blob | GIT_DIR=alt.git git hash-object -w --stdin &&
 143         git add file1 &&
 144         test_tick &&
 145         git commit -m commit_file1 &&
 146         echo HEAD | git pack-objects --local --stdout --revs >1.pack &&
 147         git index-pack 1.pack &&
 148         list_packed_objects 1.idx >1.objects &&
 149         printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
 150         ! has_any nonlocal-loose 1.objects
 151 '
 152
 153 test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
 154         echo content2 >file2 &&
 155         blob2=$(git hash-object -w file2) &&
 156         git add file2 &&
 157         test_tick &&
 158         git commit -m commit_file2 &&
 159         printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
 160         pack2=$(git pack-objects pack2 <keepobjects) &&
 161         mv pack2-$pack2.* .git/objects/pack/ &&
 162         >.git/objects/pack/pack2-$pack2.keep &&
 163         rm $(objpath $blob2) &&
 164         echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
 165         git index-pack 2a.pack &&
 166         list_packed_objects 2a.idx >2a.objects &&
 167         ! has_any keepobjects 2a.objects
 168 '
 169
 170 test_expect_success 'pack-objects respects --local (non-local pack)' '
 171         mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
 172         echo HEAD | git pack-objects --local --stdout --revs >2b.pack &&
 173         git index-pack 2b.pack &&
 174         list_packed_objects 2b.idx >2b.objects &&
 175         ! has_any keepobjects 2b.objects
 176 '
 177
 178 test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
 179         ls .git/objects/pack/ | grep bitmap >output &&
 180         test_line_count = 1 output &&
 181         packbitmap=$(basename $(cat output) .bitmap) &&
 182         list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
 183         test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
 184         >.git/objects/pack/$packbitmap.keep &&
 185         echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
 186         git index-pack 3a.pack &&
 187         list_packed_objects 3a.idx >3a.objects &&
 188         ! has_any packbitmap.objects 3a.objects
 189 '
 190
 191 test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
 192         mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
 193         rm -f .git/objects/pack/multi-pack-index &&
 194         test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
 195         echo HEAD | git pack-objects --local --stdout --revs >3b.pack &&
 196         git index-pack 3b.pack &&
 197         list_packed_objects 3b.idx >3b.objects &&
 198         ! has_any packbitmap.objects 3b.objects
 199 '
 200
 201 test_expect_success 'pack-objects to file can use bitmap' '
 202         # make sure we still have 1 bitmap index from previous tests
 203         ls .git/objects/pack/ | grep bitmap >output &&
 204         test_line_count = 1 output &&
 205         # verify equivalent packs are generated with/without using bitmap index
 206         packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
 207         packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
 208         list_packed_objects packa-$packasha1.idx >packa.objects &&
 209         list_packed_objects packb-$packbsha1.idx >packb.objects &&
 210         test_cmp packa.objects packb.objects
 211 '
 212
 213 test_expect_success 'full repack, reusing previous bitmaps' '
 214         git repack -ad &&
 215         ls .git/objects/pack/ | grep bitmap >output &&
 216         test_line_count = 1 output
 217 '
 218
 219 test_expect_success 'fetch (full bitmap)' '
 220         git --git-dir=clone.git fetch origin master:master &&
 221         git rev-parse HEAD >expect &&
 222         git --git-dir=clone.git rev-parse HEAD >actual &&
 223         test_cmp expect actual
 224 '
 225
 226 test_expect_success 'create objects for missing-HAVE tests' '
 227         blob=$(echo "missing have" | git hash-object -w --stdin) &&
 228         tree=$(printf "100644 blob $blob\tfile\n" | git mktree) &&
 229         parent=$(echo parent | git commit-tree $tree) &&
 230         commit=$(echo commit | git commit-tree $tree -p $parent) &&
 231         cat >revs <<-EOF
 232         HEAD
 233         ^HEAD^
 234         ^$commit
 235         EOF
 236 '
 237
 238 test_expect_success 'pack-objects respects --incremental' '
 239         cat >revs2 <<-EOF &&
 240         HEAD
 241         $commit
 242         EOF
 243         git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
 244         git index-pack 4.pack &&
 245         list_packed_objects 4.idx >4.objects &&
 246         test_line_count = 4 4.objects &&
 247         git rev-list --objects $commit >revlist &&
 248         cut -d" " -f1 revlist |sort >objects &&
 249         test_cmp 4.objects objects
 250 '
 251
 252 test_expect_success 'pack with missing blob' '
 253         rm $(objpath $blob) &&
 254         git pack-objects --stdout --revs <revs >/dev/null
 255 '
 256
 257 test_expect_success 'pack with missing tree' '
 258         rm $(objpath $tree) &&
 259         git pack-objects --stdout --revs <revs >/dev/null
 260 '
 261
 262 test_expect_success 'pack with missing parent' '
 263         rm $(objpath $parent) &&
 264         git pack-objects --stdout --revs <revs >/dev/null
 265 '
 266
 267 test_expect_success JGIT 'we can read jgit bitmaps' '
 268         git clone --bare . compat-jgit.git &&
 269         (
 270                 cd compat-jgit.git &&
 271                 rm -f objects/pack/*.bitmap &&
 272                 jgit gc &&
 273                 git rev-list --test-bitmap HEAD
 274         )
 275 '
 276
 277 test_expect_success JGIT 'jgit can read our bitmaps' '
 278         git clone --bare . compat-us.git &&
 279         (
 280                 cd compat-us.git &&
 281                 git repack -adb &&
 282                 # jgit gc will barf if it does not like our bitmaps
 283                 jgit gc
 284         )
 285 '
 286
 287 test_expect_success 'splitting packs does not generate bogus bitmaps' '
 288         test-tool genrandom foo $((1024 * 1024)) >rand &&
 289         git add rand &&
 290         git commit -m "commit with big file" &&
 291         git -c pack.packSizeLimit=500k repack -adb &&
 292         git init --bare no-bitmaps.git &&
 293         git -C no-bitmaps.git fetch .. HEAD
 294 '
 295
 296 test_expect_success 'set up reusable pack' '
 297         rm -f .git/objects/pack/*.keep &&
 298         git repack -adb &&
 299         reusable_pack () {
 300                 git for-each-ref --format="%(objectname)" |
 301                 git pack-objects --delta-base-offset --revs --stdout "$@"
 302         }
 303 '
 304
 305 test_expect_success 'pack reuse respects --honor-pack-keep' '
 306         test_when_finished "rm -f .git/objects/pack/*.keep" &&
 307         for i in .git/objects/pack/*.pack
 308         do
 309                 >${i%.pack}.keep
 310         done &&
 311         reusable_pack --honor-pack-keep >empty.pack &&
 312         git index-pack empty.pack &&
 313         git show-index <empty.idx >actual &&
 314         test_must_be_empty actual
 315 '
 316
 317 test_expect_success 'pack reuse respects --local' '
 318         mv .git/objects/pack/* alt.git/objects/pack/ &&
 319         test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
 320         reusable_pack --local >empty.pack &&
 321         git index-pack empty.pack &&
 322         git show-index <empty.idx >actual &&
 323         test_must_be_empty actual
 324 '
 325
 326 test_expect_success 'pack reuse respects --incremental' '
 327         reusable_pack --incremental >empty.pack &&
 328         git index-pack empty.pack &&
 329         git show-index <empty.idx >actual &&
 330         test_must_be_empty actual
 331 '
 332
 333 test_expect_success 'truncated bitmap fails gracefully' '
 334         git repack -ad &&
 335         git rev-list --use-bitmap-index --count --all >expect &&
 336         bitmap=$(ls .git/objects/pack/*.bitmap) &&
 337         test_when_finished "rm -f $bitmap" &&
 338         test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
 339         mv -f $bitmap.tmp $bitmap &&
 340         git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
 341         test_cmp expect actual &&
 342         test_i18ngrep corrupt stderr
 343 '
 344
 345 # have_delta <obj> <expected_base>
 346 #
 347 # Note that because this relies on cat-file, it might find _any_ copy of an
 348 # object in the repository. The caller is responsible for making sure
 349 # there's only one (e.g., via "repack -ad", or having just fetched a copy).
 350 have_delta () {
 351         echo $2 >expect &&
 352         echo $1 | git cat-file --batch-check="%(deltabase)" >actual &&
 353         test_cmp expect actual
 354 }
 355
 356 # Create a state of history with these properties:
 357 #
 358 #  - refs that allow a client to fetch some new history, while sharing some old
 359 #    history with the server; we use branches delta-reuse-old and
 360 #    delta-reuse-new here
 361 #
 362 #  - the new history contains an object that is stored on the server as a delta
 363 #    against a base that is in the old history
 364 #
 365 #  - the base object is not immediately reachable from the tip of the old
 366 #    history; finding it would involve digging down through history we know the
 367 #    other side has
 368 #
 369 # This should result in a state where fetching from old->new would not
 370 # traditionally reuse the on-disk delta (because we'd have to dig to realize
 371 # that the client has it), but we will do so if bitmaps can tell us cheaply
 372 # that the other side has it.
 373 test_expect_success 'set up thin delta-reuse parent' '
 374         # This first commit contains the buried base object.
 375         test-tool genrandom delta 16384 >file &&
 376         git add file &&
 377         git commit -m "delta base" &&
 378         base=$(git rev-parse --verify HEAD:file) &&
 379
 380         # These intermediate commits bury the base back in history.
 381         # This becomes the "old" state.
 382         for i in 1 2 3 4 5
 383         do
 384                 echo $i >file &&
 385                 git commit -am "intermediate $i" || return 1
 386         done &&
 387         git branch delta-reuse-old &&
 388
 389         # And now our new history has a delta against the buried base. Note
 390         # that this must be smaller than the original file, since pack-objects
 391         # prefers to create deltas from smaller objects to larger.
 392         test-tool genrandom delta 16300 >file &&
 393         git commit -am "delta result" &&
 394         delta=$(git rev-parse --verify HEAD:file) &&
 395         git branch delta-reuse-new &&
 396
 397         # Repack with bitmaps and double check that we have the expected delta
 398         # relationship.
 399         git repack -adb &&
 400         have_delta $delta $base
 401 '
 402
 403 # Now we can sanity-check the non-bitmap behavior (that the server is not able
 404 # to reuse the delta). This isn't strictly something we care about, so this
 405 # test could be scrapped in the future. But it makes sure that the next test is
 406 # actually triggering the feature we want.
 407 #
 408 # Note that our tools for working with on-the-wire "thin" packs are limited. So
 409 # we actually perform the fetch, retain the resulting pack, and inspect the
 410 # result.
 411 test_expect_success 'fetch without bitmaps ignores delta against old base' '
 412         test_config pack.usebitmaps false &&
 413         test_when_finished "rm -rf client.git" &&
 414         git init --bare client.git &&
 415         (
 416                 cd client.git &&
 417                 git config transfer.unpackLimit 1 &&
 418                 git fetch .. delta-reuse-old:delta-reuse-old &&
 419                 git fetch .. delta-reuse-new:delta-reuse-new &&
 420                 have_delta $delta $ZERO_OID
 421         )
 422 '
 423
 424 # And do the same for the bitmap case, where we do expect to find the delta.
 425 test_expect_success 'fetch with bitmaps can reuse old base' '
 426         test_config pack.usebitmaps true &&
 427         test_when_finished "rm -rf client.git" &&
 428         git init --bare client.git &&
 429         (
 430                 cd client.git &&
 431                 git config transfer.unpackLimit 1 &&
 432                 git fetch .. delta-reuse-old:delta-reuse-old &&
 433                 git fetch .. delta-reuse-new:delta-reuse-new &&
 434                 have_delta $delta $base
 435         )
 436 '
 437
 438 test_done