t/t5319-multi-pack-index.sh

   1 #!/bin/sh
   2
   3 test_description='multi-pack-indexes'
   4 . ./test-lib.sh
   5 . "$TEST_DIRECTORY"/lib-chunk.sh
   6
   7 GIT_TEST_MULTI_PACK_INDEX=0
   8 objdir=.git/objects
   9
  10 HASH_LEN=$(test_oid rawsz)
  11
  12 midx_read_expect () {
  13         NUM_PACKS=$1
  14         NUM_OBJECTS=$2
  15         NUM_CHUNKS=$3
  16         OBJECT_DIR=$4
  17         EXTRA_CHUNKS="$5"
  18         {
  19                 cat <<-EOF &&
  20                 header: 4d494458 1 $HASH_LEN $NUM_CHUNKS $NUM_PACKS
  21                 chunks: pack-names oid-fanout oid-lookup object-offsets$EXTRA_CHUNKS
  22                 num_objects: $NUM_OBJECTS
  23                 packs:
  24                 EOF
  25                 if test $NUM_PACKS -ge 1
  26                 then
  27                         ls $OBJECT_DIR/pack/ | grep idx | sort
  28                 fi &&
  29                 printf "object-dir: $OBJECT_DIR\n"
  30         } >expect &&
  31         test-tool read-midx $OBJECT_DIR >actual &&
  32         test_cmp expect actual
  33 }
  34
  35 test_expect_success 'setup' '
  36         test_oid_cache <<-EOF
  37         idxoff sha1:2999
  38         idxoff sha256:3739
  39
  40         packnameoff sha1:652
  41         packnameoff sha256:940
  42
  43         fanoutoff sha1:1
  44         fanoutoff sha256:3
  45         EOF
  46 '
  47
  48 test_expect_success "don't write midx with no packs" '
  49         test_must_fail git multi-pack-index --object-dir=. write &&
  50         test_path_is_missing pack/multi-pack-index
  51 '
  52
  53 test_expect_success SHA1 'warn if a midx contains no oid' '
  54         cp "$TEST_DIRECTORY"/t5319/no-objects.midx $objdir/pack/multi-pack-index &&
  55         test_must_fail git multi-pack-index verify &&
  56         rm $objdir/pack/multi-pack-index
  57 '
  58
  59 generate_objects () {
  60         i=$1
  61         iii=$(printf '%03i' $i)
  62         {
  63                 test-tool genrandom "bar" 200 &&
  64                 test-tool genrandom "baz $iii" 50
  65         } >wide_delta_$iii &&
  66         {
  67                 test-tool genrandom "foo"$i 100 &&
  68                 test-tool genrandom "foo"$(( $i + 1 )) 100 &&
  69                 test-tool genrandom "foo"$(( $i + 2 )) 100
  70         } >deep_delta_$iii &&
  71         {
  72                 echo $iii &&
  73                 test-tool genrandom "$iii" 8192
  74         } >file_$iii &&
  75         git update-index --add file_$iii deep_delta_$iii wide_delta_$iii
  76 }
  77
  78 commit_and_list_objects () {
  79         {
  80                 echo 101 &&
  81                 test-tool genrandom 100 8192;
  82         } >file_101 &&
  83         git update-index --add file_101 &&
  84         tree=$(git write-tree) &&
  85         commit=$(git commit-tree $tree -p HEAD</dev/null) &&
  86         {
  87                 echo $tree &&
  88                 git ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\)        .*/\\1/"
  89         } >obj-list &&
  90         git reset --hard $commit
  91 }
  92
  93 test_expect_success 'create objects' '
  94         test_commit initial &&
  95         for i in $(test_seq 1 5)
  96         do
  97                 generate_objects $i || return 1
  98         done &&
  99         commit_and_list_objects
 100 '
 101
 102 test_expect_success 'write midx with one v1 pack' '
 103         pack=$(git pack-objects --index-version=1 $objdir/pack/test <obj-list) &&
 104         test_when_finished rm $objdir/pack/test-$pack.pack \
 105                 $objdir/pack/test-$pack.idx $objdir/pack/multi-pack-index &&
 106         git multi-pack-index --object-dir=$objdir write &&
 107         midx_read_expect 1 18 4 $objdir
 108 '
 109
 110 midx_git_two_modes () {
 111         git -c core.multiPackIndex=false $1 >expect &&
 112         git -c core.multiPackIndex=true $1 >actual &&
 113         if [ "$2" = "sorted" ]
 114         then
 115                 sort <expect >expect.sorted &&
 116                 mv expect.sorted expect &&
 117                 sort <actual >actual.sorted &&
 118                 mv actual.sorted actual
 119         fi &&
 120         test_cmp expect actual
 121 }
 122
 123 compare_results_with_midx () {
 124         MSG=$1
 125         test_expect_success "check normal git operations: $MSG" '
 126                 midx_git_two_modes "rev-list --objects --all" &&
 127                 midx_git_two_modes "log --raw" &&
 128                 midx_git_two_modes "count-objects --verbose" &&
 129                 midx_git_two_modes "cat-file --batch-all-objects --batch-check" &&
 130                 midx_git_two_modes "cat-file --batch-all-objects --batch-check --unordered" sorted
 131         '
 132 }
 133
 134 test_expect_success 'write midx with one v2 pack' '
 135         git pack-objects --index-version=2,0x40 $objdir/pack/test <obj-list &&
 136         git multi-pack-index --object-dir=$objdir write &&
 137         midx_read_expect 1 18 4 $objdir
 138 '
 139
 140 compare_results_with_midx "one v2 pack"
 141
 142 test_expect_success 'corrupt idx reports errors' '
 143         idx=$(test-tool read-midx $objdir | grep "\.idx\$") &&
 144         mv $objdir/pack/$idx backup-$idx &&
 145         test_when_finished "mv backup-\$idx \$objdir/pack/\$idx" &&
 146
 147         # This is the minimum size for a sha-1 based .idx; this lets
 148         # us pass perfunctory tests, but anything that actually opens and reads
 149         # the idx file will complain.
 150         test_copy_bytes 1064 <backup-$idx >$objdir/pack/$idx &&
 151
 152         git -c core.multiPackIndex=true rev-list --objects --all 2>err &&
 153         grep "index unavailable" err
 154 '
 155
 156 test_expect_success 'add more objects' '
 157         for i in $(test_seq 6 10)
 158         do
 159                 generate_objects $i || return 1
 160         done &&
 161         commit_and_list_objects
 162 '
 163
 164 test_expect_success 'write midx with two packs' '
 165         git pack-objects --index-version=1 $objdir/pack/test-2 <obj-list &&
 166         git multi-pack-index --object-dir=$objdir write &&
 167         midx_read_expect 2 34 4 $objdir
 168 '
 169
 170 compare_results_with_midx "two packs"
 171
 172 test_expect_success 'write midx with --stdin-packs' '
 173         rm -fr $objdir/pack/multi-pack-index &&
 174
 175         idx="$(find $objdir/pack -name "test-2-*.idx")" &&
 176         basename "$idx" >in &&
 177
 178         git multi-pack-index write --stdin-packs <in &&
 179
 180         test-tool read-midx $objdir | grep "\.idx$" >packs &&
 181
 182         test_cmp packs in
 183 '
 184
 185 compare_results_with_midx "mixed mode (one pack + extra)"
 186
 187 test_expect_success 'write with no objects and preferred pack' '
 188         test_when_finished "rm -rf empty" &&
 189         git init empty &&
 190         test_must_fail git -C empty multi-pack-index write \
 191                 --stdin-packs --preferred-pack=does-not-exist </dev/null 2>err &&
 192         cat >expect <<-EOF &&
 193         warning: unknown preferred pack: ${SQ}does-not-exist${SQ}
 194         error: no pack files to index.
 195         EOF
 196         test_cmp expect err
 197 '
 198
 199 test_expect_success 'write progress off for redirected stderr' '
 200         git multi-pack-index --object-dir=$objdir write 2>err &&
 201         test_line_count = 0 err
 202 '
 203
 204 test_expect_success 'write force progress on for stderr' '
 205         GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir write --progress 2>err &&
 206         test_file_not_empty err
 207 '
 208
 209 test_expect_success 'write with the --no-progress option' '
 210         GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir write --no-progress 2>err &&
 211         test_line_count = 0 err
 212 '
 213
 214 test_expect_success 'add more packs' '
 215         for j in $(test_seq 11 20)
 216         do
 217                 generate_objects $j &&
 218                 commit_and_list_objects &&
 219                 git pack-objects --index-version=2 $objdir/pack/test-pack <obj-list || return 1
 220         done
 221 '
 222
 223 compare_results_with_midx "mixed mode (two packs + extra)"
 224
 225 test_expect_success 'write midx with twelve packs' '
 226         git multi-pack-index --object-dir=$objdir write &&
 227         midx_read_expect 12 74 4 $objdir
 228 '
 229
 230 compare_results_with_midx "twelve packs"
 231
 232 test_expect_success 'multi-pack-index *.rev cleanup with --object-dir' '
 233         git init repo &&
 234         git clone -s repo alternate &&
 235
 236         test_when_finished "rm -rf repo alternate" &&
 237
 238         (
 239                 cd repo &&
 240                 test_commit base &&
 241                 git repack -d
 242         ) &&
 243
 244         ours="alternate/.git/objects/pack/multi-pack-index-123.rev" &&
 245         theirs="repo/.git/objects/pack/multi-pack-index-abc.rev" &&
 246         touch "$ours" "$theirs" &&
 247
 248         (
 249                 cd alternate &&
 250                 git multi-pack-index --object-dir ../repo/.git/objects write
 251         ) &&
 252
 253         # writing a midx in "repo" should not remove the .rev file in the
 254         # alternate
 255         test_path_is_file repo/.git/objects/pack/multi-pack-index &&
 256         test_path_is_file $ours &&
 257         test_path_is_missing $theirs
 258 '
 259
 260 test_expect_success 'warn on improper hash version' '
 261         git init --object-format=sha1 sha1 &&
 262         (
 263                 cd sha1 &&
 264                 git config core.multiPackIndex true &&
 265                 test_commit 1 &&
 266                 git repack -a &&
 267                 git multi-pack-index write &&
 268                 mv .git/objects/pack/multi-pack-index ../mpi-sha1
 269         ) &&
 270         git init --object-format=sha256 sha256 &&
 271         (
 272                 cd sha256 &&
 273                 git config core.multiPackIndex true &&
 274                 test_commit 1 &&
 275                 git repack -a &&
 276                 git multi-pack-index write &&
 277                 mv .git/objects/pack/multi-pack-index ../mpi-sha256
 278         ) &&
 279         (
 280                 cd sha1 &&
 281                 mv ../mpi-sha256 .git/objects/pack/multi-pack-index &&
 282                 git log -1 2>err &&
 283                 test_grep "multi-pack-index hash version 2 does not match version 1" err
 284         ) &&
 285         (
 286                 cd sha256 &&
 287                 mv ../mpi-sha1 .git/objects/pack/multi-pack-index &&
 288                 git log -1 2>err &&
 289                 test_grep "multi-pack-index hash version 1 does not match version 2" err
 290         )
 291 '
 292
 293 test_expect_success 'midx picks objects from preferred pack' '
 294         test_when_finished rm -rf preferred.git &&
 295         git init --bare preferred.git &&
 296         (
 297                 cd preferred.git &&
 298
 299                 a=$(echo "a" | git hash-object -w --stdin) &&
 300                 b=$(echo "b" | git hash-object -w --stdin) &&
 301                 c=$(echo "c" | git hash-object -w --stdin) &&
 302
 303                 # Set up two packs, duplicating the object "B" at different
 304                 # offsets.
 305                 #
 306                 # Note that the "BC" pack (the one we choose as preferred) sorts
 307                 # lexically after the "AB" pack, meaning that omitting the
 308                 # --preferred-pack argument would cause this test to fail (since
 309                 # the MIDX code would select the copy of "b" in the "AB" pack).
 310                 git pack-objects objects/pack/test-AB <<-EOF &&
 311                 $a
 312                 $b
 313                 EOF
 314                 bc=$(git pack-objects objects/pack/test-BC <<-EOF
 315                 $b
 316                 $c
 317                 EOF
 318                 ) &&
 319
 320                 git multi-pack-index --object-dir=objects \
 321                         write --preferred-pack=test-BC-$bc.idx 2>err &&
 322                 test_must_be_empty err &&
 323
 324                 test-tool read-midx --show-objects objects >out &&
 325
 326                 ofs=$(git show-index <objects/pack/test-BC-$bc.idx | grep $b |
 327                         cut -d" " -f1) &&
 328                 printf "%s %s\tobjects/pack/test-BC-%s.pack\n" \
 329                         "$b" "$ofs" "$bc" >expect &&
 330                 grep ^$b out >actual &&
 331
 332                 test_cmp expect actual
 333         )
 334 '
 335
 336 test_expect_success 'preferred packs must be non-empty' '
 337         test_when_finished rm -rf preferred.git &&
 338         git init preferred.git &&
 339         (
 340                 cd preferred.git &&
 341
 342                 test_commit base &&
 343                 git repack -ad &&
 344
 345                 empty="$(git pack-objects $objdir/pack/pack </dev/null)" &&
 346
 347                 test_must_fail git multi-pack-index write \
 348                         --preferred-pack=pack-$empty.pack 2>err &&
 349                 grep "with no objects" err
 350         )
 351 '
 352
 353 test_expect_success 'preferred pack from existing MIDX without bitmaps' '
 354         git init preferred-without-bitmaps &&
 355         (
 356                 cd preferred-without-bitmaps &&
 357
 358                 test_commit one &&
 359                 pack="$(git pack-objects --all $objdir/pack/pack </dev/null)" &&
 360
 361                 git multi-pack-index write &&
 362
 363                 # make another pack so that the subsequent MIDX write
 364                 # has something to do
 365                 test_commit two &&
 366                 git repack -d &&
 367
 368                 # write a new MIDX without bitmaps reusing the singular
 369                 # pack from the existing MIDX as the preferred pack in
 370                 # the new MIDX
 371                 git multi-pack-index write --preferred-pack=pack-$pack.pack
 372         )
 373
 374 '
 375
 376 test_expect_success 'verify multi-pack-index success' '
 377         git multi-pack-index verify --object-dir=$objdir
 378 '
 379
 380 test_expect_success 'verify progress off for redirected stderr' '
 381         git multi-pack-index verify --object-dir=$objdir 2>err &&
 382         test_line_count = 0 err
 383 '
 384
 385 test_expect_success 'verify force progress on for stderr' '
 386         git multi-pack-index verify --object-dir=$objdir --progress 2>err &&
 387         test_file_not_empty err
 388 '
 389
 390 test_expect_success 'verify with the --no-progress option' '
 391         git multi-pack-index verify --object-dir=$objdir --no-progress 2>err &&
 392         test_line_count = 0 err
 393 '
 394
 395 # usage: corrupt_midx_and_verify <pos> <data> <objdir> <string>
 396 corrupt_midx_and_verify() {
 397         POS=$1 &&
 398         DATA="${2:-\0}" &&
 399         OBJDIR=$3 &&
 400         GREPSTR="$4" &&
 401         COMMAND="$5" &&
 402         if test -z "$COMMAND"
 403         then
 404                 COMMAND="git multi-pack-index verify --object-dir=$OBJDIR"
 405         fi &&
 406         FILE=$OBJDIR/pack/multi-pack-index &&
 407         chmod a+w $FILE &&
 408         test_when_finished mv midx-backup $FILE &&
 409         cp $FILE midx-backup &&
 410         printf "$DATA" | dd of="$FILE" bs=1 seek="$POS" conv=notrunc &&
 411         test_must_fail $COMMAND 2>test_err &&
 412         grep -v "^+" test_err >err &&
 413         test_grep "$GREPSTR" err
 414 }
 415
 416 test_expect_success 'verify bad signature' '
 417         corrupt_midx_and_verify 0 "\00" $objdir \
 418                 "multi-pack-index signature"
 419 '
 420
 421 NUM_OBJECTS=74
 422 MIDX_BYTE_VERSION=4
 423 MIDX_BYTE_OID_VERSION=5
 424 MIDX_BYTE_CHUNK_COUNT=6
 425 MIDX_HEADER_SIZE=12
 426 MIDX_BYTE_CHUNK_ID=$MIDX_HEADER_SIZE
 427 MIDX_BYTE_CHUNK_OFFSET=$(($MIDX_HEADER_SIZE + 4))
 428 MIDX_NUM_CHUNKS=5
 429 MIDX_CHUNK_LOOKUP_WIDTH=12
 430 MIDX_OFFSET_PACKNAMES=$(($MIDX_HEADER_SIZE + \
 431                          $MIDX_NUM_CHUNKS * $MIDX_CHUNK_LOOKUP_WIDTH))
 432 MIDX_BYTE_PACKNAME_ORDER=$(($MIDX_OFFSET_PACKNAMES + 2))
 433 MIDX_OFFSET_OID_FANOUT=$(($MIDX_OFFSET_PACKNAMES + $(test_oid packnameoff)))
 434 MIDX_OID_FANOUT_WIDTH=4
 435 MIDX_BYTE_OID_FANOUT_ORDER=$((MIDX_OFFSET_OID_FANOUT + 250 * $MIDX_OID_FANOUT_WIDTH + $(test_oid fanoutoff)))
 436 MIDX_OFFSET_OID_LOOKUP=$(($MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH))
 437 MIDX_BYTE_OID_LOOKUP=$(($MIDX_OFFSET_OID_LOOKUP + 16 * $HASH_LEN))
 438 MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN))
 439 MIDX_OFFSET_WIDTH=8
 440 MIDX_BYTE_PACK_INT_ID=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 2))
 441 MIDX_BYTE_OFFSET=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 6))
 442
 443 test_expect_success 'verify bad version' '
 444         corrupt_midx_and_verify $MIDX_BYTE_VERSION "\00" $objdir \
 445                 "multi-pack-index version"
 446 '
 447
 448 test_expect_success 'verify bad OID version' '
 449         corrupt_midx_and_verify $MIDX_BYTE_OID_VERSION "\03" $objdir \
 450                 "hash version"
 451 '
 452
 453 test_expect_success 'verify truncated chunk count' '
 454         corrupt_midx_and_verify $MIDX_BYTE_CHUNK_COUNT "\01" $objdir \
 455                 "final chunk has non-zero id"
 456 '
 457
 458 test_expect_success 'verify extended chunk count' '
 459         corrupt_midx_and_verify $MIDX_BYTE_CHUNK_COUNT "\07" $objdir \
 460                 "terminating chunk id appears earlier than expected"
 461 '
 462
 463 test_expect_success 'verify missing required chunk' '
 464         corrupt_midx_and_verify $MIDX_BYTE_CHUNK_ID "\01" $objdir \
 465                 "required pack-name chunk missing"
 466 '
 467
 468 test_expect_success 'verify invalid chunk offset' '
 469         corrupt_midx_and_verify $MIDX_BYTE_CHUNK_OFFSET "\01" $objdir \
 470                 "improper chunk offset(s)"
 471 '
 472
 473 test_expect_success 'verify packnames out of order' '
 474         corrupt_midx_and_verify $MIDX_BYTE_PACKNAME_ORDER "z" $objdir \
 475                 "pack names out of order"
 476 '
 477
 478 test_expect_success 'verify packnames out of order' '
 479         corrupt_midx_and_verify $MIDX_BYTE_PACKNAME_ORDER "a" $objdir \
 480                 "failed to load pack"
 481 '
 482
 483 test_expect_success 'verify oid fanout out of order' '
 484         corrupt_midx_and_verify $MIDX_BYTE_OID_FANOUT_ORDER "\01" $objdir \
 485                 "oid fanout out of order"
 486 '
 487
 488 test_expect_success 'verify oid lookup out of order' '
 489         corrupt_midx_and_verify $MIDX_BYTE_OID_LOOKUP "\00" $objdir \
 490                 "oid lookup out of order"
 491 '
 492
 493 test_expect_success 'verify incorrect pack-int-id' '
 494         corrupt_midx_and_verify $MIDX_BYTE_PACK_INT_ID "\07" $objdir \
 495                 "bad pack-int-id"
 496 '
 497
 498 test_expect_success 'verify incorrect offset' '
 499         corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
 500                 "incorrect object offset"
 501 '
 502
 503 test_expect_success 'git-fsck incorrect offset' '
 504         corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
 505                 "incorrect object offset" \
 506                 "git -c core.multiPackIndex=true fsck" &&
 507         test_unconfig core.multiPackIndex &&
 508         test_must_fail git fsck &&
 509         git -c core.multiPackIndex=false fsck
 510 '
 511
 512 test_expect_success 'git fsck shows MIDX output with --progress' '
 513         git fsck --progress 2>err &&
 514         grep "Verifying OID order in multi-pack-index" err &&
 515         grep "Verifying object offsets" err
 516 '
 517
 518 test_expect_success 'git fsck suppresses MIDX output with --no-progress' '
 519         git fsck --no-progress 2>err &&
 520         ! grep "Verifying OID order in multi-pack-index" err &&
 521         ! grep "Verifying object offsets" err
 522 '
 523
 524 test_expect_success 'corrupt MIDX is not reused' '
 525         corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
 526                 "incorrect object offset" &&
 527         git multi-pack-index write 2>err &&
 528         test_grep checksum.mismatch err &&
 529         git multi-pack-index verify
 530 '
 531
 532 test_expect_success 'verify incorrect checksum' '
 533         pos=$(($(wc -c <$objdir/pack/multi-pack-index) - 10)) &&
 534         corrupt_midx_and_verify $pos \
 535                 "\377\377\377\377\377\377\377\377\377\377" \
 536                 $objdir "incorrect checksum"
 537 '
 538
 539 test_expect_success 'repack progress off for redirected stderr' '
 540         GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir repack 2>err &&
 541         test_line_count = 0 err
 542 '
 543
 544 test_expect_success 'repack force progress on for stderr' '
 545         GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir repack --progress 2>err &&
 546         test_file_not_empty err
 547 '
 548
 549 test_expect_success 'repack with the --no-progress option' '
 550         GIT_PROGRESS_DELAY=0 git multi-pack-index --object-dir=$objdir repack --no-progress 2>err &&
 551         test_line_count = 0 err
 552 '
 553
 554 test_expect_success 'repack removes multi-pack-index when deleting packs' '
 555         test_path_is_file $objdir/pack/multi-pack-index &&
 556         # Set GIT_TEST_MULTI_PACK_INDEX to 0 to avoid writing a new
 557         # multi-pack-index after repacking, but set "core.multiPackIndex" to
 558         # true so that "git repack" can read the existing MIDX.
 559         GIT_TEST_MULTI_PACK_INDEX=0 git -c core.multiPackIndex repack -adf &&
 560         test_path_is_missing $objdir/pack/multi-pack-index
 561 '
 562
 563 test_expect_success 'repack preserves multi-pack-index when creating packs' '
 564         git init preserve &&
 565         test_when_finished "rm -fr preserve" &&
 566         (
 567                 cd preserve &&
 568                 packdir=.git/objects/pack &&
 569                 midx=$packdir/multi-pack-index &&
 570
 571                 test_commit 1 &&
 572                 pack1=$(git pack-objects --all $packdir/pack) &&
 573                 touch $packdir/pack-$pack1.keep &&
 574                 test_commit 2 &&
 575                 pack2=$(git pack-objects --revs $packdir/pack) &&
 576                 touch $packdir/pack-$pack2.keep &&
 577
 578                 git multi-pack-index write &&
 579                 cp $midx $midx.bak &&
 580
 581                 cat >pack-input <<-EOF &&
 582                 HEAD
 583                 ^HEAD~1
 584                 EOF
 585                 test_commit 3 &&
 586                 pack3=$(git pack-objects --revs $packdir/pack <pack-input) &&
 587                 test_commit 4 &&
 588                 pack4=$(git pack-objects --revs $packdir/pack <pack-input) &&
 589
 590                 GIT_TEST_MULTI_PACK_INDEX=0 git -c core.multiPackIndex repack -ad &&
 591                 ls -la $packdir &&
 592                 test_path_is_file $packdir/pack-$pack1.pack &&
 593                 test_path_is_file $packdir/pack-$pack2.pack &&
 594                 test_path_is_missing $packdir/pack-$pack3.pack &&
 595                 test_path_is_missing $packdir/pack-$pack4.pack &&
 596                 test_cmp_bin $midx.bak $midx
 597         )
 598 '
 599
 600 compare_results_with_midx "after repack"
 601
 602 test_expect_success 'multi-pack-index and pack-bitmap' '
 603         GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \
 604                 git -c repack.writeBitmaps=true repack -ad &&
 605         git multi-pack-index write &&
 606         git rev-list --test-bitmap HEAD
 607 '
 608
 609 test_expect_success 'multi-pack-index and alternates' '
 610         git init --bare alt.git &&
 611         echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
 612         echo content1 >file1 &&
 613         altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
 614         git cat-file blob $altblob &&
 615         git rev-list --all
 616 '
 617
 618 compare_results_with_midx "with alternate (local midx)"
 619
 620 test_expect_success 'multi-pack-index in an alternate' '
 621         mv .git/objects/pack/* alt.git/objects/pack &&
 622         test_commit add_local_objects &&
 623         git repack --local &&
 624         git multi-pack-index write &&
 625         midx_read_expect 1 3 4 $objdir &&
 626         git reset --hard HEAD~1 &&
 627         rm -f .git/objects/pack/*
 628 '
 629
 630 compare_results_with_midx "with alternate (remote midx)"
 631
 632 # usage: corrupt_data <file> <pos> [<data>]
 633 corrupt_data () {
 634         file=$1
 635         pos=$2
 636         data="${3:-\0}"
 637         printf "$data" | dd of="$file" bs=1 seek="$pos" conv=notrunc
 638 }
 639
 640 # Force 64-bit offsets by manipulating the idx file.
 641 # This makes the IDX file _incorrect_ so be careful to clean up after!
 642 test_expect_success 'force some 64-bit offsets with pack-objects' '
 643         mkdir objects64 &&
 644         mkdir objects64/pack &&
 645         for i in $(test_seq 1 11)
 646         do
 647                 generate_objects 11 || return 1
 648         done &&
 649         commit_and_list_objects &&
 650         pack64=$(git pack-objects --index-version=2,0x40 objects64/pack/test-64 <obj-list) &&
 651         idx64=objects64/pack/test-64-$pack64.idx &&
 652         chmod u+w $idx64 &&
 653         corrupt_data $idx64 $(test_oid idxoff) "\02" &&
 654         # objects64 is not a real repository, but can serve as an alternate
 655         # anyway so we can write a MIDX into it
 656         git init repo &&
 657         test_when_finished "rm -fr repo" &&
 658         (
 659                 cd repo &&
 660                 ( cd ../objects64 && pwd ) >.git/objects/info/alternates &&
 661                 midx64=$(git multi-pack-index --object-dir=../objects64 write)
 662         ) &&
 663         midx_read_expect 1 63 5 objects64 " large-offsets"
 664 '
 665
 666 test_expect_success 'verify multi-pack-index with 64-bit offsets' '
 667         git multi-pack-index verify --object-dir=objects64
 668 '
 669
 670 NUM_OBJECTS=63
 671 MIDX_OFFSET_OID_FANOUT=$((MIDX_OFFSET_PACKNAMES + 54))
 672 MIDX_OFFSET_OID_LOOKUP=$((MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH))
 673 MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN))
 674 MIDX_OFFSET_LARGE_OFFSETS=$(($MIDX_OFFSET_OBJECT_OFFSETS + $NUM_OBJECTS * $MIDX_OFFSET_WIDTH))
 675 MIDX_BYTE_LARGE_OFFSET=$(($MIDX_OFFSET_LARGE_OFFSETS + 3))
 676
 677 test_expect_success 'verify incorrect 64-bit offset' '
 678         corrupt_midx_and_verify $MIDX_BYTE_LARGE_OFFSET "\07" objects64 \
 679                 "incorrect object offset"
 680 '
 681
 682 test_expect_success 'setup expire tests' '
 683         mkdir dup &&
 684         (
 685                 cd dup &&
 686                 git init &&
 687                 test-tool genrandom "data" 4096 >large_file.txt &&
 688                 git update-index --add large_file.txt &&
 689                 for i in $(test_seq 1 20)
 690                 do
 691                         test_commit $i || exit 1
 692                 done &&
 693                 git branch A HEAD &&
 694                 git branch B HEAD~8 &&
 695                 git branch C HEAD~13 &&
 696                 git branch D HEAD~16 &&
 697                 git branch E HEAD~18 &&
 698                 git pack-objects --revs .git/objects/pack/pack-A <<-EOF &&
 699                 refs/heads/A
 700                 ^refs/heads/B
 701                 EOF
 702                 git pack-objects --revs .git/objects/pack/pack-B <<-EOF &&
 703                 refs/heads/B
 704                 ^refs/heads/C
 705                 EOF
 706                 git pack-objects --revs .git/objects/pack/pack-C <<-EOF &&
 707                 refs/heads/C
 708                 ^refs/heads/D
 709                 EOF
 710                 git pack-objects --revs .git/objects/pack/pack-D <<-EOF &&
 711                 refs/heads/D
 712                 ^refs/heads/E
 713                 EOF
 714                 git pack-objects --revs .git/objects/pack/pack-E <<-EOF &&
 715                 refs/heads/E
 716                 EOF
 717                 git multi-pack-index write &&
 718                 cp -r .git/objects/pack .git/objects/pack-backup
 719         )
 720 '
 721
 722 test_expect_success 'expire does not remove any packs' '
 723         (
 724                 cd dup &&
 725                 ls .git/objects/pack >expect &&
 726                 git multi-pack-index expire &&
 727                 ls .git/objects/pack >actual &&
 728                 test_cmp expect actual
 729         )
 730 '
 731
 732 test_expect_success 'expire progress off for redirected stderr' '
 733         (
 734                 cd dup &&
 735                 git multi-pack-index expire 2>err &&
 736                 test_line_count = 0 err
 737         )
 738 '
 739
 740 test_expect_success 'expire force progress on for stderr' '
 741         (
 742                 cd dup &&
 743                 GIT_PROGRESS_DELAY=0 git multi-pack-index expire --progress 2>err &&
 744                 test_file_not_empty err
 745         )
 746 '
 747
 748 test_expect_success 'expire with the --no-progress option' '
 749         (
 750                 cd dup &&
 751                 GIT_PROGRESS_DELAY=0 git multi-pack-index expire --no-progress 2>err &&
 752                 test_line_count = 0 err
 753         )
 754 '
 755
 756 test_expect_success 'expire removes unreferenced packs' '
 757         (
 758                 cd dup &&
 759                 git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
 760                 refs/heads/A
 761                 ^refs/heads/C
 762                 EOF
 763                 git multi-pack-index write &&
 764                 ls .git/objects/pack | grep -v -e pack-[AB] >expect &&
 765                 git multi-pack-index expire &&
 766                 ls .git/objects/pack >actual &&
 767                 test_cmp expect actual &&
 768                 ls .git/objects/pack/ | grep idx >expect-idx &&
 769                 test-tool read-midx .git/objects | grep idx >actual-midx &&
 770                 test_cmp expect-idx actual-midx &&
 771                 git multi-pack-index verify &&
 772                 git fsck
 773         )
 774 '
 775
 776 test_expect_success 'repack with minimum size does not alter existing packs' '
 777         (
 778                 cd dup &&
 779                 rm -rf .git/objects/pack &&
 780                 mv .git/objects/pack-backup .git/objects/pack &&
 781                 test-tool chmtime =-5 .git/objects/pack/pack-D* &&
 782                 test-tool chmtime =-4 .git/objects/pack/pack-C* &&
 783                 test-tool chmtime =-3 .git/objects/pack/pack-B* &&
 784                 test-tool chmtime =-2 .git/objects/pack/pack-A* &&
 785                 ls .git/objects/pack >expect &&
 786                 MINSIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | head -n 1) &&
 787                 git multi-pack-index repack --batch-size=$MINSIZE &&
 788                 ls .git/objects/pack >actual &&
 789                 test_cmp expect actual
 790         )
 791 '
 792
 793 test_expect_success 'repack respects repack.packKeptObjects=false' '
 794         test_when_finished rm -f dup/.git/objects/pack/*keep &&
 795         (
 796                 cd dup &&
 797                 ls .git/objects/pack/*idx >idx-list &&
 798                 test_line_count = 5 idx-list &&
 799                 ls .git/objects/pack/*.pack | sed "s/\.pack/.keep/" >keep-list &&
 800                 test_line_count = 5 keep-list &&
 801                 for keep in $(cat keep-list)
 802                 do
 803                         touch $keep || return 1
 804                 done &&
 805                 git multi-pack-index repack --batch-size=0 &&
 806                 ls .git/objects/pack/*idx >idx-list &&
 807                 test_line_count = 5 idx-list &&
 808                 test-tool read-midx .git/objects | grep idx >midx-list &&
 809                 test_line_count = 5 midx-list &&
 810                 THIRD_SMALLEST_SIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | sed -n 3p) &&
 811                 BATCH_SIZE=$((THIRD_SMALLEST_SIZE + 1)) &&
 812                 git multi-pack-index repack --batch-size=$BATCH_SIZE &&
 813                 ls .git/objects/pack/*idx >idx-list &&
 814                 test_line_count = 5 idx-list &&
 815                 test-tool read-midx .git/objects | grep idx >midx-list &&
 816                 test_line_count = 5 midx-list
 817         )
 818 '
 819
 820 test_expect_success 'repack creates a new pack' '
 821         (
 822                 cd dup &&
 823                 ls .git/objects/pack/*idx >idx-list &&
 824                 test_line_count = 5 idx-list &&
 825                 THIRD_SMALLEST_SIZE=$(test-tool path-utils file-size .git/objects/pack/*pack | sort -n | head -n 3 | tail -n 1) &&
 826                 BATCH_SIZE=$(($THIRD_SMALLEST_SIZE + 1)) &&
 827                 git multi-pack-index repack --batch-size=$BATCH_SIZE &&
 828                 ls .git/objects/pack/*idx >idx-list &&
 829                 test_line_count = 6 idx-list &&
 830                 test-tool read-midx .git/objects | grep idx >midx-list &&
 831                 test_line_count = 6 midx-list
 832         )
 833 '
 834
 835 test_expect_success 'repack (all) ignores cruft pack' '
 836         git init repo &&
 837         test_when_finished "rm -fr repo" &&
 838         (
 839                 cd repo &&
 840
 841                 test_commit base &&
 842                 test_commit --no-tag unreachable &&
 843
 844                 git reset --hard base &&
 845                 git reflog expire --all --expire=all &&
 846                 git repack --cruft -d &&
 847
 848                 git multi-pack-index write &&
 849
 850                 find $objdir/pack | sort >before &&
 851                 git multi-pack-index repack --batch-size=0 &&
 852                 find $objdir/pack | sort >after &&
 853
 854                 test_cmp before after
 855         )
 856 '
 857
 858 test_expect_success 'repack (--batch-size) ignores cruft pack' '
 859         git init repo &&
 860         test_when_finished "rm -fr repo" &&
 861         (
 862                 cd repo &&
 863
 864                 test_commit_bulk 5 &&
 865                 test_commit --no-tag unreachable &&
 866
 867                 git reset --hard HEAD^ &&
 868                 git reflog expire --all --expire=all &&
 869                 git repack --cruft -d &&
 870
 871                 test_commit four &&
 872
 873                 find $objdir/pack -type f -name "*.pack" | sort >before &&
 874                 git repack -d &&
 875                 find $objdir/pack -type f -name "*.pack" | sort >after &&
 876
 877                 pack="$(comm -13 before after)" &&
 878                 test_file_size "$pack" >sz &&
 879                 # Set --batch-size to twice the size of the pack created
 880                 # in the previous step, since this is enough to
 881                 # accommodate it and the cruft pack.
 882                 #
 883                 # This means that the MIDX machinery *could* combine the
 884                 # new and cruft packs together.
 885                 #
 886                 # We ensure that it does not below.
 887                 batch="$((($(cat sz) * 2)))" &&
 888
 889                 git multi-pack-index write &&
 890
 891                 find $objdir/pack | sort >before &&
 892                 git multi-pack-index repack --batch-size=$batch &&
 893                 find $objdir/pack | sort >after &&
 894
 895                 test_cmp before after
 896         )
 897 '
 898
 899 test_expect_success 'expire removes repacked packs' '
 900         (
 901                 cd dup &&
 902                 ls -al .git/objects/pack/*pack &&
 903                 ls -S .git/objects/pack/*pack | head -n 4 >expect &&
 904                 git multi-pack-index expire &&
 905                 ls -S .git/objects/pack/*pack >actual &&
 906                 test_cmp expect actual &&
 907                 test-tool read-midx .git/objects | grep idx >midx-list &&
 908                 test_line_count = 4 midx-list
 909         )
 910 '
 911
 912 test_expect_success 'expire works when adding new packs' '
 913         (
 914                 cd dup &&
 915                 git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
 916                 refs/heads/A
 917                 ^refs/heads/B
 918                 EOF
 919                 git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
 920                 refs/heads/B
 921                 ^refs/heads/C
 922                 EOF
 923                 git pack-objects --revs .git/objects/pack/pack-combined <<-EOF &&
 924                 refs/heads/C
 925                 ^refs/heads/D
 926                 EOF
 927                 git multi-pack-index write &&
 928                 git pack-objects --revs .git/objects/pack/a-pack <<-EOF &&
 929                 refs/heads/D
 930                 ^refs/heads/E
 931                 EOF
 932                 git multi-pack-index write &&
 933                 git pack-objects --revs .git/objects/pack/z-pack <<-EOF &&
 934                 refs/heads/E
 935                 EOF
 936                 git multi-pack-index expire &&
 937                 ls .git/objects/pack/ | grep idx >expect &&
 938                 test-tool read-midx .git/objects | grep idx >actual &&
 939                 test_cmp expect actual &&
 940                 git multi-pack-index verify
 941         )
 942 '
 943
 944 test_expect_success 'expire respects .keep files' '
 945         (
 946                 cd dup &&
 947                 git pack-objects --revs .git/objects/pack/pack-all <<-EOF &&
 948                 refs/heads/A
 949                 EOF
 950                 git multi-pack-index write &&
 951                 PACKA=$(ls .git/objects/pack/a-pack*\.pack | sed s/\.pack\$//) &&
 952                 touch $PACKA.keep &&
 953                 git multi-pack-index expire &&
 954                 test_path_is_file $PACKA.idx &&
 955                 test_path_is_file $PACKA.keep &&
 956                 test_path_is_file $PACKA.pack &&
 957                 test-tool read-midx .git/objects | grep idx >midx-list &&
 958                 test_line_count = 2 midx-list
 959         )
 960 '
 961
 962 test_expect_success 'expiring unreferenced cruft pack retains pack' '
 963         git init repo &&
 964         test_when_finished "rm -fr repo" &&
 965         (
 966                 cd repo &&
 967
 968                 test_commit base &&
 969                 test_commit --no-tag unreachable &&
 970                 unreachable=$(git rev-parse HEAD) &&
 971
 972                 git reset --hard base &&
 973                 git reflog expire --all --expire=all &&
 974                 git repack --cruft -d &&
 975                 mtimes="$(ls $objdir/pack/pack-*.mtimes)" &&
 976
 977                 echo "base..$unreachable" >in &&
 978                 pack="$(git pack-objects --revs --delta-base-offset \
 979                         $objdir/pack/pack <in)" &&
 980
 981                 # Preferring the contents of "$pack" will leave the
 982                 # cruft pack unreferenced (ie., none of the objects
 983                 # contained in the cruft pack will have their MIDX copy
 984                 # selected from the cruft pack).
 985                 git multi-pack-index write --preferred-pack="pack-$pack.pack" &&
 986                 git multi-pack-index expire &&
 987
 988                 test_path_is_file "$mtimes"
 989         )
 990 '
 991
 992 test_expect_success 'repack --batch-size=0 repacks everything' '
 993         cp -r dup dup2 &&
 994         (
 995                 cd dup &&
 996                 rm .git/objects/pack/*.keep &&
 997                 ls .git/objects/pack/*idx >idx-list &&
 998                 test_line_count = 2 idx-list &&
 999                 git multi-pack-index repack --batch-size=0 &&
1000                 ls .git/objects/pack/*idx >idx-list &&
1001                 test_line_count = 3 idx-list &&
1002                 test-tool read-midx .git/objects | grep idx >midx-list &&
1003                 test_line_count = 3 midx-list &&
1004                 git multi-pack-index expire &&
1005                 ls -al .git/objects/pack/*idx >idx-list &&
1006                 test_line_count = 1 idx-list &&
1007                 git multi-pack-index repack --batch-size=0 &&
1008                 ls -al .git/objects/pack/*idx >new-idx-list &&
1009                 test_cmp idx-list new-idx-list
1010         )
1011 '
1012
1013 test_expect_success 'repack --batch-size=<large> repacks everything' '
1014         (
1015                 cd dup2 &&
1016                 rm .git/objects/pack/*.keep &&
1017                 ls .git/objects/pack/*idx >idx-list &&
1018                 test_line_count = 2 idx-list &&
1019                 git multi-pack-index repack --batch-size=2000000 &&
1020                 ls .git/objects/pack/*idx >idx-list &&
1021                 test_line_count = 3 idx-list &&
1022                 test-tool read-midx .git/objects | grep idx >midx-list &&
1023                 test_line_count = 3 midx-list &&
1024                 git multi-pack-index expire &&
1025                 ls -al .git/objects/pack/*idx >idx-list &&
1026                 test_line_count = 1 idx-list
1027         )
1028 '
1029
1030 test_expect_success 'load reverse index when missing .idx, .pack' '
1031         git init repo &&
1032         test_when_finished "rm -fr repo" &&
1033         (
1034                 cd repo &&
1035
1036                 git config core.multiPackIndex true &&
1037
1038                 test_commit base &&
1039                 git repack -ad &&
1040                 git multi-pack-index write &&
1041
1042                 git rev-parse HEAD >tip &&
1043                 pack=$(ls .git/objects/pack/pack-*.pack) &&
1044                 idx=$(ls .git/objects/pack/pack-*.idx) &&
1045
1046                 mv $idx $idx.bak &&
1047                 git cat-file --batch-check="%(objectsize:disk)" <tip &&
1048
1049                 mv $idx.bak $idx &&
1050
1051                 mv $pack $pack.bak &&
1052                 git cat-file --batch-check="%(objectsize:disk)" <tip
1053         )
1054 '
1055
1056 test_expect_success 'usage shown without sub-command' '
1057         test_expect_code 129 git multi-pack-index 2>err &&
1058         ! test_grep "unrecognized subcommand" err
1059 '
1060
1061 test_expect_success 'complains when run outside of a repository' '
1062         nongit test_must_fail git multi-pack-index write 2>err &&
1063         grep "not a git repository" err
1064 '
1065
1066 test_expect_success 'repack with delta islands' '
1067         git init repo &&
1068         test_when_finished "rm -fr repo" &&
1069         (
1070                 cd repo &&
1071
1072                 test_commit first &&
1073                 git repack &&
1074                 test_commit second &&
1075                 git repack &&
1076
1077                 git multi-pack-index write &&
1078                 git -c repack.useDeltaIslands=true multi-pack-index repack
1079         )
1080 '
1081
1082 corrupt_chunk () {
1083         midx=.git/objects/pack/multi-pack-index &&
1084         test_when_finished "rm -rf $midx" &&
1085         git repack -ad --write-midx &&
1086         corrupt_chunk_file $midx "$@"
1087 }
1088
1089 test_expect_success 'reader notices too-small oid fanout chunk' '
1090         corrupt_chunk OIDF clear 00000000 &&
1091         test_must_fail git log 2>err &&
1092         cat >expect <<-\EOF &&
1093         error: multi-pack-index OID fanout is of the wrong size
1094         fatal: multi-pack-index required OID fanout chunk missing or corrupted
1095         EOF
1096         test_cmp expect err
1097 '
1098
1099 test_expect_success 'reader notices too-small oid lookup chunk' '
1100         corrupt_chunk OIDL clear 00000000 &&
1101         test_must_fail git log 2>err &&
1102         cat >expect <<-\EOF &&
1103         error: multi-pack-index OID lookup chunk is the wrong size
1104         fatal: multi-pack-index required OID lookup chunk missing or corrupted
1105         EOF
1106         test_cmp expect err
1107 '
1108
1109 test_expect_success 'reader notices too-small pack names chunk' '
1110         # There is no NUL to terminate the name here, so the
1111         # chunk is too short.
1112         corrupt_chunk PNAM clear 70656666 &&
1113         test_must_fail git log 2>err &&
1114         cat >expect <<-\EOF &&
1115         fatal: multi-pack-index pack-name chunk is too short
1116         EOF
1117         test_cmp expect err
1118 '
1119
1120 test_expect_success 'reader handles unaligned chunks' '
1121         # A 9-byte PNAM means all of the subsequent chunks
1122         # will no longer be 4-byte aligned, but it is still
1123         # a valid one-pack chunk on its own (it is "foo.pack\0").
1124         corrupt_chunk PNAM clear 666f6f2e7061636b00 &&
1125         git -c core.multipackindex=false log >expect.out &&
1126         git -c core.multipackindex=true log >out 2>err &&
1127         test_cmp expect.out out &&
1128         cat >expect.err <<-\EOF &&
1129         error: chunk id 4f494446 not 4-byte aligned
1130         EOF
1131         test_cmp expect.err err
1132 '
1133
1134 test_expect_success 'reader notices too-small object offset chunk' '
1135         corrupt_chunk OOFF clear 00000000 &&
1136         test_must_fail git log 2>err &&
1137         cat >expect <<-\EOF &&
1138         error: multi-pack-index object offset chunk is the wrong size
1139         fatal: multi-pack-index required object offsets chunk missing or corrupted
1140         EOF
1141         test_cmp expect err
1142 '
1143
1144 test_expect_success 'reader bounds-checks large offset table' '
1145         # re-use the objects64 dir here to cheaply get access to a midx
1146         # with large offsets.
1147         git init repo &&
1148         test_when_finished "rm -rf repo" &&
1149         (
1150                 cd repo &&
1151                 (cd ../objects64 && pwd) >.git/objects/info/alternates &&
1152                 git multi-pack-index --object-dir=../objects64 write &&
1153                 midx=../objects64/pack/multi-pack-index &&
1154                 corrupt_chunk_file $midx LOFF clear &&
1155                 # using only %(objectsize) is important here; see the commit
1156                 # message for more details
1157                 test_must_fail git cat-file --batch-all-objects \
1158                         --batch-check="%(objectsize)" 2>err &&
1159                 cat >expect <<-\EOF &&
1160                 fatal: multi-pack-index large offset out of bounds
1161                 EOF
1162                 test_cmp expect err
1163         )
1164 '
1165
1166 test_expect_success 'reader notices too-small revindex chunk' '
1167         # We only get a revindex with bitmaps (and likewise only
1168         # load it when they are asked for).
1169         test_config repack.writeBitmaps true &&
1170         corrupt_chunk RIDX clear 00000000 &&
1171         git -c core.multipackIndex=false rev-list \
1172                 --all --use-bitmap-index >expect.out &&
1173         git -c core.multipackIndex=true rev-list \
1174                 --all --use-bitmap-index >out 2>err &&
1175         test_cmp expect.out out &&
1176         cat >expect.err <<-\EOF &&
1177         error: multi-pack-index reverse-index chunk is the wrong size
1178         warning: multi-pack bitmap is missing required reverse index
1179         EOF
1180         test_cmp expect.err err
1181 '
1182
1183 test_expect_success 'reader notices out-of-bounds fanout' '
1184         # This is similar to the out-of-bounds fanout test in t5318. The values
1185         # in adjacent entries should be large but not identical (they
1186         # are used as hi/lo starts for a binary search, which would then abort
1187         # immediately).
1188         corrupt_chunk OIDF 0 $(printf "%02x000000" $(test_seq 0 254)) &&
1189         test_must_fail git log 2>err &&
1190         cat >expect <<-\EOF &&
1191         error: oid fanout out of order: fanout[254] = fe000000 > 5c = fanout[255]
1192         fatal: multi-pack-index required OID fanout chunk missing or corrupted
1193         EOF
1194         test_cmp expect err
1195 '
1196
1197 test_expect_success 'bitmapped packs are stored via the BTMP chunk' '
1198         test_when_finished "rm -fr repo" &&
1199         git init repo &&
1200         (
1201                 cd repo &&
1202
1203                 for i in 1 2 3 4 5
1204                 do
1205                         test_commit "$i" &&
1206                         git repack -d || return 1
1207                 done &&
1208
1209                 find $objdir/pack -type f -name "*.idx" | xargs -n 1 basename |
1210                 sort >packs &&
1211
1212                 git multi-pack-index write --stdin-packs <packs &&
1213                 test_must_fail test-tool read-midx --bitmap $objdir 2>err &&
1214                 cat >expect <<-\EOF &&
1215                 error: MIDX does not contain the BTMP chunk
1216                 EOF
1217                 test_cmp expect err &&
1218
1219                 git multi-pack-index write --stdin-packs --bitmap \
1220                         --preferred-pack="$(head -n1 <packs)" <packs  &&
1221                 test-tool read-midx --bitmap $objdir >actual &&
1222                 for i in $(test_seq $(wc -l <packs))
1223                 do
1224                         sed -ne "${i}s/\.idx$/\.pack/p" packs &&
1225                         echo "  bitmap_pos: $((($i - 1) * 3))" &&
1226                         echo "  bitmap_nr: 3" || return 1
1227                 done >expect &&
1228                 test_cmp expect actual
1229         )
1230 '
1231
1232 test_done