t/t5616-partial-clone.sh

   1 #!/bin/sh
   2
   3 test_description='git partial clone'
   4
   5 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
   6 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
   7
   8 . ./test-lib.sh
   9
  10 # create a normal "src" repo where we can later create new commits.
  11 # expect_1.oids will contain a list of the OIDs of all blobs.
  12 test_expect_success 'setup normal src repo' '
  13         echo "{print \$1}" >print_1.awk &&
  14         echo "{print \$2}" >print_2.awk &&
  15
  16         git init src &&
  17         for n in 1 2 3 4
  18         do
  19                 echo "This is file: $n" > src/file.$n.txt &&
  20                 git -C src add file.$n.txt &&
  21                 git -C src commit -m "file $n" &&
  22                 git -C src ls-files -s file.$n.txt >>temp || return 1
  23         done &&
  24         awk -f print_2.awk <temp | sort >expect_1.oids &&
  25         test_line_count = 4 expect_1.oids
  26 '
  27
  28 # bare clone "src" giving "srv.bare" for use as our server.
  29 test_expect_success 'setup bare clone for server' '
  30         git clone --bare "file://$(pwd)/src" srv.bare &&
  31         git -C srv.bare config --local uploadpack.allowfilter 1 &&
  32         git -C srv.bare config --local uploadpack.allowanysha1inwant 1
  33 '
  34
  35 # do basic partial clone from "srv.bare"
  36 # confirm we are missing all of the known blobs.
  37 # confirm partial clone was registered in the local config.
  38 test_expect_success 'do partial clone 1' '
  39         git clone --no-checkout --filter=blob:none "file://$(pwd)/srv.bare" pc1 &&
  40
  41         git -C pc1 rev-list --quiet --objects --missing=print HEAD >revs &&
  42         awk -f print_1.awk revs |
  43         sed "s/?//" |
  44         sort >observed.oids &&
  45
  46         test_cmp expect_1.oids observed.oids &&
  47         test "$(git -C pc1 config --local core.repositoryformatversion)" = "1" &&
  48         test "$(git -C pc1 config --local remote.origin.promisor)" = "true" &&
  49         test "$(git -C pc1 config --local remote.origin.partialclonefilter)" = "blob:none"
  50 '
  51
  52 test_expect_success 'rev-list --missing=allow-promisor on partial clone' '
  53         git -C pc1 rev-list --objects --missing=allow-promisor HEAD >actual &&
  54         git -C pc1 rev-list --objects --missing=print HEAD >expect.raw &&
  55         grep -v "^?" expect.raw >expect &&
  56         test_cmp expect actual
  57 '
  58
  59 test_expect_success 'verify that .promisor file contains refs fetched' '
  60         ls pc1/.git/objects/pack/pack-*.promisor >promisorlist &&
  61         test_line_count = 1 promisorlist &&
  62         git -C srv.bare rev-parse --verify HEAD >headhash &&
  63         grep "$(cat headhash) HEAD" $(cat promisorlist) &&
  64         grep "$(cat headhash) refs/heads/main" $(cat promisorlist)
  65 '
  66
  67 # checkout main to force dynamic object fetch of blobs at HEAD.
  68 test_expect_success 'verify checkout with dynamic object fetch' '
  69         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  70         test_line_count = 4 observed &&
  71         git -C pc1 checkout main &&
  72         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  73         test_line_count = 0 observed
  74 '
  75
  76 # create new commits in "src" repo to establish a blame history on file.1.txt
  77 # and push to "srv.bare".
  78 test_expect_success 'push new commits to server' '
  79         git -C src remote add srv "file://$(pwd)/srv.bare" &&
  80         for x in a b c d e
  81         do
  82                 echo "Mod file.1.txt $x" >>src/file.1.txt &&
  83                 git -C src add file.1.txt &&
  84                 git -C src commit -m "mod $x" || return 1
  85         done &&
  86         git -C src blame main -- file.1.txt >expect.blame &&
  87         git -C src push -u srv main
  88 '
  89
  90 # (partial) fetch in the partial clone repo from the promisor remote.
  91 # verify that fetch inherited the filter-spec from the config and DOES NOT
  92 # have the new blobs.
  93 test_expect_success 'partial fetch inherits filter settings' '
  94         git -C pc1 fetch origin &&
  95         git -C pc1 rev-list --quiet --objects --missing=print \
  96                 main..origin/main >observed &&
  97         test_line_count = 5 observed
  98 '
  99
 100 # force dynamic object fetch using diff.
 101 # we should only get 1 new blob (for the file in origin/main).
 102 test_expect_success 'verify diff causes dynamic object fetch' '
 103         git -C pc1 diff main..origin/main -- file.1.txt &&
 104         git -C pc1 rev-list --quiet --objects --missing=print \
 105                  main..origin/main >observed &&
 106         test_line_count = 4 observed
 107 '
 108
 109 # force full dynamic object fetch of the file's history using blame.
 110 # we should get the intermediate blobs for the file.
 111 test_expect_success 'verify blame causes dynamic object fetch' '
 112         git -C pc1 blame origin/main -- file.1.txt >observed.blame &&
 113         test_cmp expect.blame observed.blame &&
 114         git -C pc1 rev-list --quiet --objects --missing=print \
 115                 main..origin/main >observed &&
 116         test_line_count = 0 observed
 117 '
 118
 119 # create new commits in "src" repo to establish a history on file.2.txt
 120 # and push to "srv.bare".
 121 test_expect_success 'push new commits to server for file.2.txt' '
 122         for x in a b c d e f
 123         do
 124                 echo "Mod file.2.txt $x" >>src/file.2.txt &&
 125                 git -C src add file.2.txt &&
 126                 git -C src commit -m "mod $x" || return 1
 127         done &&
 128         git -C src push -u srv main
 129 '
 130
 131 # Do FULL fetch by disabling inherited filter-spec using --no-filter.
 132 # Verify we have all the new blobs.
 133 test_expect_success 'override inherited filter-spec using --no-filter' '
 134         git -C pc1 fetch --no-filter origin &&
 135         git -C pc1 rev-list --quiet --objects --missing=print \
 136                 main..origin/main >observed &&
 137         test_line_count = 0 observed
 138 '
 139
 140 # create new commits in "src" repo to establish a history on file.3.txt
 141 # and push to "srv.bare".
 142 test_expect_success 'push new commits to server for file.3.txt' '
 143         for x in a b c d e f
 144         do
 145                 echo "Mod file.3.txt $x" >>src/file.3.txt &&
 146                 git -C src add file.3.txt &&
 147                 git -C src commit -m "mod $x" || return 1
 148         done &&
 149         git -C src push -u srv main
 150 '
 151
 152 # Do a partial fetch and then try to manually fetch the missing objects.
 153 # This can be used as the basis of a pre-command hook to bulk fetch objects
 154 # perhaps combined with a command in dry-run mode.
 155 test_expect_success 'manual prefetch of missing objects' '
 156         git -C pc1 fetch --filter=blob:none origin &&
 157
 158         git -C pc1 rev-list --quiet --objects --missing=print \
 159                  main..origin/main >revs &&
 160         awk -f print_1.awk revs |
 161         sed "s/?//" |
 162         sort >observed.oids &&
 163
 164         test_line_count = 6 observed.oids &&
 165         git -C pc1 fetch-pack --stdin "file://$(pwd)/srv.bare" <observed.oids &&
 166
 167         git -C pc1 rev-list --quiet --objects --missing=print \
 168                 main..origin/main >revs &&
 169         awk -f print_1.awk revs |
 170         sed "s/?//" |
 171         sort >observed.oids &&
 172
 173         test_line_count = 0 observed.oids
 174 '
 175
 176 # create new commits in "src" repo to establish a history on file.4.txt
 177 # and push to "srv.bare".
 178 test_expect_success 'push new commits to server for file.4.txt' '
 179         for x in a b c d e f
 180         do
 181                 echo "Mod file.4.txt $x" >src/file.4.txt &&
 182                 if list_contains "a,b" "$x"; then
 183                         printf "%10000s" X >>src/file.4.txt
 184                 fi &&
 185                 if list_contains "c,d" "$x"; then
 186                         printf "%20000s" X >>src/file.4.txt
 187                 fi &&
 188                 git -C src add file.4.txt &&
 189                 git -C src commit -m "mod $x" || return 1
 190         done &&
 191         git -C src push -u srv main
 192 '
 193
 194 # Do partial fetch to fetch smaller files; then verify that without --refetch
 195 # applying a new filter does not refetch missing large objects. Then use
 196 # --refetch to apply the new filter on existing commits. Test it under both
 197 # protocol v2 & v0.
 198 test_expect_success 'apply a different filter using --refetch' '
 199         git -C pc1 fetch --filter=blob:limit=999 origin &&
 200         git -C pc1 rev-list --quiet --objects --missing=print \
 201                 main..origin/main >observed &&
 202         test_line_count = 4 observed &&
 203
 204         git -C pc1 fetch --filter=blob:limit=19999 --refetch origin &&
 205         git -C pc1 rev-list --quiet --objects --missing=print \
 206                 main..origin/main >observed &&
 207         test_line_count = 2 observed &&
 208
 209         git -c protocol.version=0 -C pc1 fetch --filter=blob:limit=29999 \
 210                 --refetch origin &&
 211         git -C pc1 rev-list --quiet --objects --missing=print \
 212                 main..origin/main >observed &&
 213         test_line_count = 0 observed
 214 '
 215
 216 test_expect_success 'fetch --refetch works with a shallow clone' '
 217         git clone --no-checkout --depth=1 --filter=blob:none "file://$(pwd)/srv.bare" pc1s &&
 218         git -C pc1s rev-list --objects --missing=print HEAD >observed &&
 219         test_line_count = 6 observed &&
 220
 221         GIT_TRACE=1 git -C pc1s fetch --filter=blob:limit=999 --refetch origin &&
 222         git -C pc1s rev-list --objects --missing=print HEAD >observed &&
 223         test_line_count = 6 observed
 224 '
 225
 226 test_expect_success 'fetch --refetch triggers repacking' '
 227         GIT_TRACE2_CONFIG_PARAMS=gc.autoPackLimit,maintenance.incremental-repack.auto &&
 228         export GIT_TRACE2_CONFIG_PARAMS &&
 229
 230         GIT_TRACE2_EVENT="$PWD/trace1.event" \
 231         git -C pc1 fetch --refetch origin &&
 232         test_subcommand git maintenance run --auto --no-quiet <trace1.event &&
 233         grep \"param\":\"gc.autopacklimit\",\"value\":\"1\" trace1.event &&
 234         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"-1\" trace1.event &&
 235
 236         GIT_TRACE2_EVENT="$PWD/trace2.event" \
 237         git -c protocol.version=0 \
 238                 -c gc.autoPackLimit=0 \
 239                 -c maintenance.incremental-repack.auto=1234 \
 240                 -C pc1 fetch --refetch origin &&
 241         test_subcommand git maintenance run --auto --no-quiet <trace2.event &&
 242         grep \"param\":\"gc.autopacklimit\",\"value\":\"0\" trace2.event &&
 243         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"-1\" trace2.event &&
 244
 245         GIT_TRACE2_EVENT="$PWD/trace3.event" \
 246         git -c protocol.version=0 \
 247                 -c gc.autoPackLimit=1234 \
 248                 -c maintenance.incremental-repack.auto=0 \
 249                 -C pc1 fetch --refetch origin &&
 250         test_subcommand git maintenance run --auto --no-quiet <trace3.event &&
 251         grep \"param\":\"gc.autopacklimit\",\"value\":\"1\" trace3.event &&
 252         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"0\" trace3.event
 253 '
 254
 255 test_expect_success 'partial clone with transfer.fsckobjects=1 works with submodules' '
 256         test_create_repo submodule &&
 257         test_commit -C submodule mycommit &&
 258
 259         test_create_repo src_with_sub &&
 260         test_config -C src_with_sub uploadpack.allowfilter 1 &&
 261         test_config -C src_with_sub uploadpack.allowanysha1inwant 1 &&
 262
 263         test_config_global protocol.file.allow always &&
 264
 265         git -C src_with_sub submodule add "file://$(pwd)/submodule" mysub &&
 266         git -C src_with_sub commit -m "commit with submodule" &&
 267
 268         git -c transfer.fsckobjects=1 \
 269                 clone --filter="blob:none" "file://$(pwd)/src_with_sub" dst &&
 270         test_when_finished rm -rf dst
 271 '
 272
 273 test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack --fsck-objects' '
 274         git init src &&
 275         test_commit -C src x &&
 276         test_config -C src uploadpack.allowfilter 1 &&
 277         test_config -C src uploadpack.allowanysha1inwant 1 &&
 278
 279         GIT_TRACE="$(pwd)/trace" git -c transfer.fsckobjects=1 \
 280                 clone --filter="blob:none" "file://$(pwd)/src" dst &&
 281         grep "git index-pack.*--fsck-objects" trace
 282 '
 283
 284 test_expect_success 'use fsck before and after manually fetching a missing subtree' '
 285         # push new commit so server has a subtree
 286         mkdir src/dir &&
 287         echo "in dir" >src/dir/file.txt &&
 288         git -C src add dir/file.txt &&
 289         git -C src commit -m "file in dir" &&
 290         git -C src push -u srv main &&
 291         SUBTREE=$(git -C src rev-parse HEAD:dir) &&
 292
 293         rm -rf dst &&
 294         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" dst &&
 295         git -C dst fsck &&
 296
 297         # Make sure we only have commits, and all trees and blobs are missing.
 298         git -C dst rev-list --missing=allow-any --objects main \
 299                 >fetched_objects &&
 300         awk -f print_1.awk fetched_objects |
 301         xargs -n1 git -C dst cat-file -t >fetched_types &&
 302
 303         sort -u fetched_types >unique_types.observed &&
 304         echo commit >unique_types.expected &&
 305         test_cmp unique_types.expected unique_types.observed &&
 306
 307         # Auto-fetch a tree with cat-file.
 308         git -C dst cat-file -p $SUBTREE >tree_contents &&
 309         grep file.txt tree_contents &&
 310
 311         # fsck still works after an auto-fetch of a tree.
 312         git -C dst fsck &&
 313
 314         # Auto-fetch all remaining trees and blobs with --missing=error
 315         git -C dst rev-list --missing=error --objects main >fetched_objects &&
 316         test_line_count = 88 fetched_objects &&
 317
 318         awk -f print_1.awk fetched_objects |
 319         xargs -n1 git -C dst cat-file -t >fetched_types &&
 320
 321         sort -u fetched_types >unique_types.observed &&
 322         test_write_lines blob commit tree >unique_types.expected &&
 323         test_cmp unique_types.expected unique_types.observed
 324 '
 325
 326 test_expect_success 'implicitly construct combine: filter with repeated flags' '
 327         GIT_TRACE=$(pwd)/trace git clone --bare \
 328                 --filter=blob:none --filter=tree:1 \
 329                 "file://$(pwd)/srv.bare" pc2 &&
 330         grep "trace:.* git pack-objects .*--filter=combine:blob:none+tree:1" \
 331                 trace &&
 332         git -C pc2 rev-list --objects --missing=allow-any HEAD >objects &&
 333
 334         # We should have gotten some root trees.
 335         grep " $" objects &&
 336         # Should not have gotten any non-root trees or blobs.
 337         ! grep " ." objects &&
 338
 339         xargs -n 1 git -C pc2 cat-file -t <objects >types &&
 340         sort -u types >unique_types.actual &&
 341         test_write_lines commit tree >unique_types.expected &&
 342         test_cmp unique_types.expected unique_types.actual
 343 '
 344
 345 test_expect_success 'upload-pack complains of bogus filter config' '
 346         printf 0000 |
 347         test_must_fail git \
 348                 -c uploadpackfilter.tree.maxdepth \
 349                 upload-pack . >/dev/null 2>err &&
 350         test_i18ngrep "unable to parse.*tree.maxdepth" err
 351 '
 352
 353 test_expect_success 'upload-pack fails banned object filters' '
 354         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 355         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 356                 "file://$(pwd)/srv.bare" pc3 2>err &&
 357         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 358 '
 359
 360 test_expect_success 'upload-pack fails banned combine object filters' '
 361         test_config -C srv.bare uploadpackfilter.allow false &&
 362         test_config -C srv.bare uploadpackfilter.combine.allow true &&
 363         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 364         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 365         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 366                 --filter=blob:none "file://$(pwd)/srv.bare" pc3 2>err &&
 367         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 368 '
 369
 370 test_expect_success 'upload-pack fails banned object filters with fallback' '
 371         test_config -C srv.bare uploadpackfilter.allow false &&
 372         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 373                 "file://$(pwd)/srv.bare" pc3 2>err &&
 374         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 375 '
 376
 377 test_expect_success 'upload-pack limits tree depth filters' '
 378         test_config -C srv.bare uploadpackfilter.allow false &&
 379         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 380         test_config -C srv.bare uploadpackfilter.tree.maxDepth 0 &&
 381         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 382                 "file://$(pwd)/srv.bare" pc3 2>err &&
 383         test_i18ngrep "tree filter allows max depth 0, but got 1" err &&
 384
 385         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" pc4 &&
 386
 387         test_config -C srv.bare uploadpackfilter.tree.maxDepth 5 &&
 388         git clone --no-checkout --filter=tree:5 "file://$(pwd)/srv.bare" pc5 &&
 389         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:6 \
 390                 "file://$(pwd)/srv.bare" pc6 2>err &&
 391         test_i18ngrep "tree filter allows max depth 5, but got 6" err
 392 '
 393
 394 test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' '
 395         rm -rf src dst &&
 396         git init src &&
 397         test_commit -C src x &&
 398         test_config -C src uploadpack.allowfilter 1 &&
 399         test_config -C src uploadpack.allowanysha1inwant 1 &&
 400
 401         # Create a tag pointing to a blob.
 402         BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) &&
 403         git -C src tag myblob "$BLOB" &&
 404
 405         git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err &&
 406         ! grep "does not point to a valid object" err &&
 407         git -C dst fsck
 408 '
 409
 410 test_expect_success 'fetch what is specified on CLI even if already promised' '
 411         rm -rf src dst.git &&
 412         git init src &&
 413         test_commit -C src foo &&
 414         test_config -C src uploadpack.allowfilter 1 &&
 415         test_config -C src uploadpack.allowanysha1inwant 1 &&
 416
 417         git hash-object --stdin <src/foo.t >blob &&
 418
 419         git clone --bare --filter=blob:none "file://$(pwd)/src" dst.git &&
 420         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_before &&
 421         grep "?$(cat blob)" missing_before &&
 422         git -C dst.git fetch origin $(cat blob) &&
 423         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_after &&
 424         ! grep "?$(cat blob)" missing_after
 425 '
 426
 427 test_expect_success 'setup src repo for sparse filter' '
 428         git init sparse-src &&
 429         git -C sparse-src config --local uploadpack.allowfilter 1 &&
 430         git -C sparse-src config --local uploadpack.allowanysha1inwant 1 &&
 431         test_commit -C sparse-src one &&
 432         test_commit -C sparse-src two &&
 433         echo /one.t >sparse-src/only-one &&
 434         git -C sparse-src add . &&
 435         git -C sparse-src commit -m "add sparse checkout files"
 436 '
 437
 438 test_expect_success 'partial clone with sparse filter succeeds' '
 439         rm -rf dst.git &&
 440         git clone --no-local --bare \
 441                   --filter=sparse:oid=main:only-one \
 442                   sparse-src dst.git &&
 443         (
 444                 cd dst.git &&
 445                 git rev-list --objects --missing=print HEAD >out &&
 446                 grep "^$(git rev-parse HEAD:one.t)" out &&
 447                 grep "^?$(git rev-parse HEAD:two.t)" out
 448         )
 449 '
 450
 451 test_expect_success 'partial clone with unresolvable sparse filter fails cleanly' '
 452         rm -rf dst.git &&
 453         test_must_fail git clone --no-local --bare \
 454                                  --filter=sparse:oid=main:no-such-name \
 455                                  sparse-src dst.git 2>err &&
 456         test_i18ngrep "unable to access sparse blob in .main:no-such-name" err &&
 457         test_must_fail git clone --no-local --bare \
 458                                  --filter=sparse:oid=main \
 459                                  sparse-src dst.git 2>err &&
 460         test_i18ngrep "unable to parse sparse filter data in" err
 461 '
 462
 463 setup_triangle () {
 464         rm -rf big-blob.txt server client promisor-remote &&
 465
 466         printf "line %d\n" $(test_seq 1 100) >big-blob.txt &&
 467
 468         # Create a server with 2 commits: a commit with a big tree and a child
 469         # commit with an incremental change. Also, create a partial clone
 470         # client that only contains the first commit.
 471         git init server &&
 472         git -C server config --local uploadpack.allowfilter 1 &&
 473         for i in $(test_seq 1 100)
 474         do
 475                 echo "make the tree big" >server/file$i &&
 476                 git -C server add file$i || return 1
 477         done &&
 478         git -C server commit -m "initial" &&
 479         git clone --bare --filter=tree:0 "file://$(pwd)/server" client &&
 480         echo another line >>server/file1 &&
 481         git -C server commit -am "incremental change" &&
 482
 483         # Create a promisor remote that only contains the tree and blob from
 484         # the first commit.
 485         git init promisor-remote &&
 486         git -C server config --local uploadpack.allowanysha1inwant 1 &&
 487         TREE_HASH=$(git -C server rev-parse HEAD~1^{tree}) &&
 488         git -C promisor-remote fetch --keep "file://$(pwd)/server" "$TREE_HASH" &&
 489         git -C promisor-remote count-objects -v >object-count &&
 490         test_i18ngrep "count: 0" object-count &&
 491         test_i18ngrep "in-pack: 2" object-count &&
 492
 493         # Set it as the promisor remote of client. Thus, whenever
 494         # the client lazy fetches, the lazy fetch will succeed only if it is
 495         # for this tree or blob.
 496         test_commit -C promisor-remote one && # so that ref advertisement is not empty
 497         git -C promisor-remote config --local uploadpack.allowanysha1inwant 1 &&
 498         git -C client remote set-url origin "file://$(pwd)/promisor-remote"
 499 }
 500
 501 # NEEDSWORK: The tests beginning with "fetch lazy-fetches" below only
 502 # test that "fetch" avoid fetching trees and blobs, but not commits or
 503 # tags. Revisit this if Git is ever taught to support partial clones
 504 # with commits and/or tags filtered out.
 505
 506 test_expect_success 'fetch lazy-fetches only to resolve deltas' '
 507         setup_triangle &&
 508
 509         # Exercise to make sure it works. Git will not fetch anything from the
 510         # promisor remote other than for the big tree (because it needs to
 511         # resolve the delta).
 512         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 513                 fetch "file://$(pwd)/server" main &&
 514
 515         # Verify the assumption that the client needed to fetch the delta base
 516         # to resolve the delta.
 517         git -C server rev-parse HEAD~1^{tree} >hash &&
 518         grep "want $(cat hash)" trace
 519 '
 520
 521 test_expect_success 'fetch lazy-fetches only to resolve deltas, protocol v2' '
 522         setup_triangle &&
 523
 524         git -C server config --local protocol.version 2 &&
 525         git -C client config --local protocol.version 2 &&
 526         git -C promisor-remote config --local protocol.version 2 &&
 527
 528         # Exercise to make sure it works. Git will not fetch anything from the
 529         # promisor remote other than for the big blob (because it needs to
 530         # resolve the delta).
 531         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 532                 fetch "file://$(pwd)/server" main &&
 533
 534         # Verify that protocol version 2 was used.
 535         grep "fetch< version 2" trace &&
 536
 537         # Verify the assumption that the client needed to fetch the delta base
 538         # to resolve the delta.
 539         git -C server rev-parse HEAD~1^{tree} >hash &&
 540         grep "want $(cat hash)" trace
 541 '
 542
 543 test_expect_success 'fetch does not lazy-fetch missing targets of its refs' '
 544         rm -rf server client trace &&
 545
 546         test_create_repo server &&
 547         test_config -C server uploadpack.allowfilter 1 &&
 548         test_config -C server uploadpack.allowanysha1inwant 1 &&
 549         test_commit -C server foo &&
 550
 551         git clone --filter=blob:none "file://$(pwd)/server" client &&
 552         # Make all refs point to nothing by deleting all objects.
 553         rm client/.git/objects/pack/* &&
 554
 555         test_commit -C server bar &&
 556         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch \
 557                 --no-tags --recurse-submodules=no \
 558                 origin refs/tags/bar &&
 559         FOO_HASH=$(git -C server rev-parse foo) &&
 560         ! grep "want $FOO_HASH" trace
 561 '
 562
 563 # The following two tests must be in this order. It is important that
 564 # the srv.bare repository did not have tags during clone, but has tags
 565 # in the fetch.
 566
 567 test_expect_success 'verify fetch succeeds when asking for new tags' '
 568         git clone --filter=blob:none "file://$(pwd)/srv.bare" tag-test &&
 569         for i in I J K
 570         do
 571                 test_commit -C src $i &&
 572                 git -C src branch $i || return 1
 573         done &&
 574         git -C srv.bare fetch --tags origin +refs/heads/*:refs/heads/* &&
 575         git -C tag-test -c protocol.version=2 fetch --tags origin
 576 '
 577
 578 test_expect_success 'verify fetch downloads only one pack when updating refs' '
 579         git clone --filter=blob:none "file://$(pwd)/srv.bare" pack-test &&
 580         ls pack-test/.git/objects/pack/*pack >pack-list &&
 581         test_line_count = 2 pack-list &&
 582         for i in A B C
 583         do
 584                 test_commit -C src $i &&
 585                 git -C src branch $i || return 1
 586         done &&
 587         git -C srv.bare fetch origin +refs/heads/*:refs/heads/* &&
 588         git -C pack-test fetch origin &&
 589         ls pack-test/.git/objects/pack/*pack >pack-list &&
 590         test_line_count = 3 pack-list
 591 '
 592
 593 test_expect_success 'single-branch tag following respects partial clone' '
 594         git clone --single-branch -b B --filter=blob:none \
 595                 "file://$(pwd)/srv.bare" single &&
 596         git -C single rev-parse --verify refs/tags/B &&
 597         git -C single rev-parse --verify refs/tags/A &&
 598         test_must_fail git -C single rev-parse --verify refs/tags/C
 599 '
 600
 601 test_expect_success 'fetch from a partial clone, protocol v0' '
 602         rm -rf server client trace &&
 603
 604         # Pretend that the server is a partial clone
 605         git init server &&
 606         git -C server remote add a_remote "file://$(pwd)/" &&
 607         test_config -C server core.repositoryformatversion 1 &&
 608         test_config -C server extensions.partialclone a_remote &&
 609         test_config -C server protocol.version 0 &&
 610         test_commit -C server foo &&
 611
 612         # Fetch from the server
 613         git init client &&
 614         test_config -C client protocol.version 0 &&
 615         test_commit -C client bar &&
 616         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 617         ! grep "version 2" trace
 618 '
 619
 620 test_expect_success 'fetch from a partial clone, protocol v2' '
 621         rm -rf server client trace &&
 622
 623         # Pretend that the server is a partial clone
 624         git init server &&
 625         git -C server remote add a_remote "file://$(pwd)/" &&
 626         test_config -C server core.repositoryformatversion 1 &&
 627         test_config -C server extensions.partialclone a_remote &&
 628         test_config -C server protocol.version 2 &&
 629         test_commit -C server foo &&
 630
 631         # Fetch from the server
 632         git init client &&
 633         test_config -C client protocol.version 2 &&
 634         test_commit -C client bar &&
 635         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 636         grep "version 2" trace
 637 '
 638
 639 test_expect_success 'repack does not loosen promisor objects' '
 640         rm -rf client trace &&
 641         git clone --bare --filter=blob:none "file://$(pwd)/srv.bare" client &&
 642         test_when_finished "rm -rf client trace" &&
 643         GIT_TRACE2_PERF="$(pwd)/trace" git -C client repack -A -d &&
 644         grep "loosen_unused_packed_objects/loosened:0" trace
 645 '
 646
 647 test_expect_success 'lazy-fetch in submodule succeeds' '
 648         # setup
 649         test_config_global protocol.file.allow always &&
 650
 651         test_when_finished "rm -rf src-sub" &&
 652         git init src-sub &&
 653         git -C src-sub config uploadpack.allowfilter 1 &&
 654         git -C src-sub config uploadpack.allowanysha1inwant 1 &&
 655
 656         # This blob must be missing in the subsequent commit.
 657         echo foo >src-sub/file &&
 658         git -C src-sub add file &&
 659         git -C src-sub commit -m "submodule one" &&
 660         SUB_ONE=$(git -C src-sub rev-parse HEAD) &&
 661
 662         echo bar >src-sub/file &&
 663         git -C src-sub add file &&
 664         git -C src-sub commit -m "submodule two" &&
 665         SUB_TWO=$(git -C src-sub rev-parse HEAD) &&
 666
 667         test_when_finished "rm -rf src-super" &&
 668         git init src-super &&
 669         git -C src-super config uploadpack.allowfilter 1 &&
 670         git -C src-super config uploadpack.allowanysha1inwant 1 &&
 671         git -C src-super submodule add ../src-sub src-sub &&
 672
 673         git -C src-super/src-sub checkout $SUB_ONE &&
 674         git -C src-super add src-sub &&
 675         git -C src-super commit -m "superproject one" &&
 676
 677         git -C src-super/src-sub checkout $SUB_TWO &&
 678         git -C src-super add src-sub &&
 679         git -C src-super commit -m "superproject two" &&
 680
 681         # the fetch
 682         test_when_finished "rm -rf client" &&
 683         git clone --filter=blob:none --also-filter-submodules \
 684                 --recurse-submodules "file://$(pwd)/src-super" client &&
 685
 686         # Trigger lazy-fetch from the superproject
 687         git -C client restore --recurse-submodules --source=HEAD^ :/
 688 '
 689
 690 . "$TEST_DIRECTORY"/lib-httpd.sh
 691 start_httpd
 692
 693 # Converts bytes into their hexadecimal representation. For example,
 694 # "printf 'ab\r\n' | hex_unpack" results in '61620d0a'.
 695 hex_unpack () {
 696         perl -e '$/ = undef; $input = <>; print unpack("H2" x length($input), $input)'
 697 }
 698
 699 # Inserts $1 at the start of the string and every 2 characters thereafter.
 700 intersperse () {
 701         sed 's/\(..\)/'$1'\1/g'
 702 }
 703
 704 # Create a one-time-perl command to replace the existing packfile with $1.
 705 replace_packfile () {
 706         # The protocol requires that the packfile be sent in sideband 1, hence
 707         # the extra \x01 byte at the beginning.
 708         cp $1 "$HTTPD_ROOT_PATH/one-time-pack" &&
 709         echo 'if (/packfile/) {
 710                 print;
 711                 my $length = -s "one-time-pack";
 712                 printf "%04x\x01", $length + 5;
 713                 print `cat one-time-pack` . "0000";
 714                 last
 715         }' >"$HTTPD_ROOT_PATH/one-time-perl"
 716 }
 717
 718 test_expect_success 'upon cloning, check that all refs point to objects' '
 719         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 720         rm -rf "$SERVER" repo &&
 721         test_create_repo "$SERVER" &&
 722         test_commit -C "$SERVER" foo &&
 723         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 724         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 725
 726         # Create a tag pointing to a blob.
 727         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 728         git -C "$SERVER" tag myblob "$BLOB" &&
 729
 730         # Craft a packfile not including that blob.
 731         git -C "$SERVER" rev-parse HEAD |
 732         git -C "$SERVER" pack-objects --stdout >incomplete.pack &&
 733
 734         # Replace the existing packfile with the crafted one. The protocol
 735         # requires that the packfile be sent in sideband 1, hence the extra
 736         # \x01 byte at the beginning.
 737         replace_packfile incomplete.pack &&
 738
 739         # Use protocol v2 because the perl command looks for the "packfile"
 740         # section header.
 741         test_config -C "$SERVER" protocol.version 2 &&
 742         test_must_fail git -c protocol.version=2 clone \
 743                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2>err &&
 744
 745         test_i18ngrep "did not send all necessary objects" err &&
 746
 747         # Ensure that the one-time-perl script was used.
 748         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 749 '
 750
 751 test_expect_success 'when partial cloning, tolerate server not sending target of tag' '
 752         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 753         rm -rf "$SERVER" repo &&
 754         test_create_repo "$SERVER" &&
 755         test_commit -C "$SERVER" foo &&
 756         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 757         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 758
 759         # Create an annotated tag pointing to a blob.
 760         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 761         git -C "$SERVER" tag -m message -a myblob "$BLOB" &&
 762
 763         # Craft a packfile including the tag, but not the blob it points to.
 764         # Also, omit objects referenced from HEAD in order to force a second
 765         # fetch (to fetch missing objects) upon the automatic checkout that
 766         # happens after a clone.
 767         printf "%s\n%s\n--not\n%s\n%s\n" \
 768                 $(git -C "$SERVER" rev-parse HEAD) \
 769                 $(git -C "$SERVER" rev-parse myblob) \
 770                 $(git -C "$SERVER" rev-parse HEAD^{tree}) \
 771                 $(git -C "$SERVER" rev-parse myblob^{blob}) |
 772                 git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack &&
 773
 774         # Replace the existing packfile with the crafted one. The protocol
 775         # requires that the packfile be sent in sideband 1, hence the extra
 776         # \x01 byte at the beginning.
 777         replace_packfile incomplete.pack &&
 778
 779         # Use protocol v2 because the perl command looks for the "packfile"
 780         # section header.
 781         test_config -C "$SERVER" protocol.version 2 &&
 782
 783         # Exercise to make sure it works.
 784         git -c protocol.version=2 clone \
 785                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2> err &&
 786         ! grep "missing object referenced by" err &&
 787
 788         # Ensure that the one-time-perl script was used.
 789         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 790 '
 791
 792 test_expect_success 'tolerate server sending REF_DELTA against missing promisor objects' '
 793         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 794         rm -rf "$SERVER" repo &&
 795         test_create_repo "$SERVER" &&
 796         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 797         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 798
 799         # Create a commit with 2 blobs to be used as delta bases.
 800         for i in $(test_seq 10)
 801         do
 802                 echo "this is a line" >>"$SERVER/foo.txt" &&
 803                 echo "this is another line" >>"$SERVER/have.txt" || return 1
 804         done &&
 805         git -C "$SERVER" add foo.txt have.txt &&
 806         git -C "$SERVER" commit -m bar &&
 807         git -C "$SERVER" rev-parse HEAD:foo.txt >deltabase_missing &&
 808         git -C "$SERVER" rev-parse HEAD:have.txt >deltabase_have &&
 809
 810         # Clone. The client has deltabase_have but not deltabase_missing.
 811         git -c protocol.version=2 clone --no-checkout \
 812                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo &&
 813         git -C repo hash-object -w -- "$SERVER/have.txt" &&
 814
 815         # Sanity check to ensure that the client does not have
 816         # deltabase_missing.
 817         git -C repo rev-list --objects --ignore-missing \
 818                 -- $(cat deltabase_missing) >objlist &&
 819         test_line_count = 0 objlist &&
 820
 821         # Another commit. This commit will be fetched by the client.
 822         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/foo.txt" &&
 823         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/have.txt" &&
 824         git -C "$SERVER" add foo.txt have.txt &&
 825         git -C "$SERVER" commit -m baz &&
 826
 827         # Pack a thin pack containing, among other things, HEAD:foo.txt
 828         # delta-ed against HEAD^:foo.txt and HEAD:have.txt delta-ed against
 829         # HEAD^:have.txt.
 830         printf "%s\n--not\n%s\n" \
 831                 $(git -C "$SERVER" rev-parse HEAD) \
 832                 $(git -C "$SERVER" rev-parse HEAD^) |
 833                 git -C "$SERVER" pack-objects --thin --stdout >thin.pack &&
 834
 835         # Ensure that the pack contains one delta against HEAD^:foo.txt. Since
 836         # the delta contains at least 26 novel characters, the size cannot be
 837         # contained in 4 bits, so the object header will take up 2 bytes. The
 838         # most significant nybble of the first byte is 0b1111 (0b1 to indicate
 839         # that the header continues, and 0b111 to indicate REF_DELTA), followed
 840         # by any 3 nybbles, then the OID of the delta base.
 841         printf "f.,..%s" $(intersperse "," <deltabase_missing) >want &&
 842         hex_unpack <thin.pack | intersperse "," >have &&
 843         grep $(cat want) have &&
 844
 845         # Ensure that the pack contains one delta against HEAD^:have.txt,
 846         # similar to the above.
 847         printf "f.,..%s" $(intersperse "," <deltabase_have) >want &&
 848         hex_unpack <thin.pack | intersperse "," >have &&
 849         grep $(cat want) have &&
 850
 851         replace_packfile thin.pack &&
 852
 853         # Use protocol v2 because the perl command looks for the "packfile"
 854         # section header.
 855         test_config -C "$SERVER" protocol.version 2 &&
 856
 857         # Fetch the thin pack and ensure that index-pack is able to handle the
 858         # REF_DELTA object with a missing promisor delta base.
 859         GIT_TRACE_PACKET="$(pwd)/trace" git -C repo -c protocol.version=2 fetch &&
 860
 861         # Ensure that the missing delta base was directly fetched, but not the
 862         # one that the client has.
 863         grep "want $(cat deltabase_missing)" trace &&
 864         ! grep "want $(cat deltabase_have)" trace &&
 865
 866         # Ensure that the one-time-perl script was used.
 867         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 868 '
 869
 870 # DO NOT add non-httpd-specific tests here, because the last part of this
 871 # test script is only executed when httpd is available and enabled.
 872
 873 test_done