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="$PWD/trace3.event" \
 246         git -c protocol.version=0 \
 247                 -c gc.autoPackLimit=1234 \
 248                 -c maintenance.incremental-repack.auto=0 \
 249                 -C pc1 fetch --refetch origin &&
 250         test_subcommand git maintenance run --auto --no-quiet <trace3.event &&
 251         grep \"param\":\"gc.autopacklimit\",\"value\":\"1\" trace3.event &&
 252         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"0\" trace3.event
 253 '
 254
 255 test_expect_success 'partial clone with transfer.fsckobjects=1 works with submodules' '
 256         test_create_repo submodule &&
 257         test_commit -C submodule mycommit &&
 258
 259         test_create_repo src_with_sub &&
 260         test_config -C src_with_sub uploadpack.allowfilter 1 &&
 261         test_config -C src_with_sub uploadpack.allowanysha1inwant 1 &&
 262
 263         git -C src_with_sub submodule add "file://$(pwd)/submodule" mysub &&
 264         git -C src_with_sub commit -m "commit with submodule" &&
 265
 266         git -c transfer.fsckobjects=1 \
 267                 clone --filter="blob:none" "file://$(pwd)/src_with_sub" dst &&
 268         test_when_finished rm -rf dst
 269 '
 270
 271 test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack --fsck-objects' '
 272         git init src &&
 273         test_commit -C src x &&
 274         test_config -C src uploadpack.allowfilter 1 &&
 275         test_config -C src uploadpack.allowanysha1inwant 1 &&
 276
 277         GIT_TRACE="$(pwd)/trace" git -c transfer.fsckobjects=1 \
 278                 clone --filter="blob:none" "file://$(pwd)/src" dst &&
 279         grep "git index-pack.*--fsck-objects" trace
 280 '
 281
 282 test_expect_success 'use fsck before and after manually fetching a missing subtree' '
 283         # push new commit so server has a subtree
 284         mkdir src/dir &&
 285         echo "in dir" >src/dir/file.txt &&
 286         git -C src add dir/file.txt &&
 287         git -C src commit -m "file in dir" &&
 288         git -C src push -u srv main &&
 289         SUBTREE=$(git -C src rev-parse HEAD:dir) &&
 290
 291         rm -rf dst &&
 292         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" dst &&
 293         git -C dst fsck &&
 294
 295         # Make sure we only have commits, and all trees and blobs are missing.
 296         git -C dst rev-list --missing=allow-any --objects main \
 297                 >fetched_objects &&
 298         awk -f print_1.awk fetched_objects |
 299         xargs -n1 git -C dst cat-file -t >fetched_types &&
 300
 301         sort -u fetched_types >unique_types.observed &&
 302         echo commit >unique_types.expected &&
 303         test_cmp unique_types.expected unique_types.observed &&
 304
 305         # Auto-fetch a tree with cat-file.
 306         git -C dst cat-file -p $SUBTREE >tree_contents &&
 307         grep file.txt tree_contents &&
 308
 309         # fsck still works after an auto-fetch of a tree.
 310         git -C dst fsck &&
 311
 312         # Auto-fetch all remaining trees and blobs with --missing=error
 313         git -C dst rev-list --missing=error --objects main >fetched_objects &&
 314         test_line_count = 88 fetched_objects &&
 315
 316         awk -f print_1.awk fetched_objects |
 317         xargs -n1 git -C dst cat-file -t >fetched_types &&
 318
 319         sort -u fetched_types >unique_types.observed &&
 320         test_write_lines blob commit tree >unique_types.expected &&
 321         test_cmp unique_types.expected unique_types.observed
 322 '
 323
 324 test_expect_success 'implicitly construct combine: filter with repeated flags' '
 325         GIT_TRACE=$(pwd)/trace git clone --bare \
 326                 --filter=blob:none --filter=tree:1 \
 327                 "file://$(pwd)/srv.bare" pc2 &&
 328         grep "trace:.* git pack-objects .*--filter=combine:blob:none+tree:1" \
 329                 trace &&
 330         git -C pc2 rev-list --objects --missing=allow-any HEAD >objects &&
 331
 332         # We should have gotten some root trees.
 333         grep " $" objects &&
 334         # Should not have gotten any non-root trees or blobs.
 335         ! grep " ." objects &&
 336
 337         xargs -n 1 git -C pc2 cat-file -t <objects >types &&
 338         sort -u types >unique_types.actual &&
 339         test_write_lines commit tree >unique_types.expected &&
 340         test_cmp unique_types.expected unique_types.actual
 341 '
 342
 343 test_expect_success 'upload-pack complains of bogus filter config' '
 344         printf 0000 |
 345         test_must_fail git \
 346                 -c uploadpackfilter.tree.maxdepth \
 347                 upload-pack . >/dev/null 2>err &&
 348         test_i18ngrep "unable to parse.*tree.maxdepth" err
 349 '
 350
 351 test_expect_success 'upload-pack fails banned object filters' '
 352         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 353         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 354                 "file://$(pwd)/srv.bare" pc3 2>err &&
 355         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 356 '
 357
 358 test_expect_success 'upload-pack fails banned combine object filters' '
 359         test_config -C srv.bare uploadpackfilter.allow false &&
 360         test_config -C srv.bare uploadpackfilter.combine.allow true &&
 361         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 362         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 363         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 364                 --filter=blob:none "file://$(pwd)/srv.bare" pc3 2>err &&
 365         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 366 '
 367
 368 test_expect_success 'upload-pack fails banned object filters with fallback' '
 369         test_config -C srv.bare uploadpackfilter.allow false &&
 370         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 371                 "file://$(pwd)/srv.bare" pc3 2>err &&
 372         test_i18ngrep "filter '\''blob:none'\'' not supported" err
 373 '
 374
 375 test_expect_success 'upload-pack limits tree depth filters' '
 376         test_config -C srv.bare uploadpackfilter.allow false &&
 377         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 378         test_config -C srv.bare uploadpackfilter.tree.maxDepth 0 &&
 379         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 380                 "file://$(pwd)/srv.bare" pc3 2>err &&
 381         test_i18ngrep "tree filter allows max depth 0, but got 1" err &&
 382
 383         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" pc4 &&
 384
 385         test_config -C srv.bare uploadpackfilter.tree.maxDepth 5 &&
 386         git clone --no-checkout --filter=tree:5 "file://$(pwd)/srv.bare" pc5 &&
 387         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:6 \
 388                 "file://$(pwd)/srv.bare" pc6 2>err &&
 389         test_i18ngrep "tree filter allows max depth 5, but got 6" err
 390 '
 391
 392 test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' '
 393         rm -rf src dst &&
 394         git init src &&
 395         test_commit -C src x &&
 396         test_config -C src uploadpack.allowfilter 1 &&
 397         test_config -C src uploadpack.allowanysha1inwant 1 &&
 398
 399         # Create a tag pointing to a blob.
 400         BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) &&
 401         git -C src tag myblob "$BLOB" &&
 402
 403         git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err &&
 404         ! grep "does not point to a valid object" err &&
 405         git -C dst fsck
 406 '
 407
 408 test_expect_success 'fetch what is specified on CLI even if already promised' '
 409         rm -rf src dst.git &&
 410         git init src &&
 411         test_commit -C src foo &&
 412         test_config -C src uploadpack.allowfilter 1 &&
 413         test_config -C src uploadpack.allowanysha1inwant 1 &&
 414
 415         git hash-object --stdin <src/foo.t >blob &&
 416
 417         git clone --bare --filter=blob:none "file://$(pwd)/src" dst.git &&
 418         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_before &&
 419         grep "?$(cat blob)" missing_before &&
 420         git -C dst.git fetch origin $(cat blob) &&
 421         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_after &&
 422         ! grep "?$(cat blob)" missing_after
 423 '
 424
 425 test_expect_success 'setup src repo for sparse filter' '
 426         git init sparse-src &&
 427         git -C sparse-src config --local uploadpack.allowfilter 1 &&
 428         git -C sparse-src config --local uploadpack.allowanysha1inwant 1 &&
 429         test_commit -C sparse-src one &&
 430         test_commit -C sparse-src two &&
 431         echo /one.t >sparse-src/only-one &&
 432         git -C sparse-src add . &&
 433         git -C sparse-src commit -m "add sparse checkout files"
 434 '
 435
 436 test_expect_success 'partial clone with sparse filter succeeds' '
 437         rm -rf dst.git &&
 438         git clone --no-local --bare \
 439                   --filter=sparse:oid=main:only-one \
 440                   sparse-src dst.git &&
 441         (
 442                 cd dst.git &&
 443                 git rev-list --objects --missing=print HEAD >out &&
 444                 grep "^$(git rev-parse HEAD:one.t)" out &&
 445                 grep "^?$(git rev-parse HEAD:two.t)" out
 446         )
 447 '
 448
 449 test_expect_success 'partial clone with unresolvable sparse filter fails cleanly' '
 450         rm -rf dst.git &&
 451         test_must_fail git clone --no-local --bare \
 452                                  --filter=sparse:oid=main:no-such-name \
 453                                  sparse-src dst.git 2>err &&
 454         test_i18ngrep "unable to access sparse blob in .main:no-such-name" err &&
 455         test_must_fail git clone --no-local --bare \
 456                                  --filter=sparse:oid=main \
 457                                  sparse-src dst.git 2>err &&
 458         test_i18ngrep "unable to parse sparse filter data in" err
 459 '
 460
 461 setup_triangle () {
 462         rm -rf big-blob.txt server client promisor-remote &&
 463
 464         printf "line %d\n" $(test_seq 1 100) >big-blob.txt &&
 465
 466         # Create a server with 2 commits: a commit with a big tree and a child
 467         # commit with an incremental change. Also, create a partial clone
 468         # client that only contains the first commit.
 469         git init server &&
 470         git -C server config --local uploadpack.allowfilter 1 &&
 471         for i in $(test_seq 1 100)
 472         do
 473                 echo "make the tree big" >server/file$i &&
 474                 git -C server add file$i || return 1
 475         done &&
 476         git -C server commit -m "initial" &&
 477         git clone --bare --filter=tree:0 "file://$(pwd)/server" client &&
 478         echo another line >>server/file1 &&
 479         git -C server commit -am "incremental change" &&
 480
 481         # Create a promisor remote that only contains the tree and blob from
 482         # the first commit.
 483         git init promisor-remote &&
 484         git -C server config --local uploadpack.allowanysha1inwant 1 &&
 485         TREE_HASH=$(git -C server rev-parse HEAD~1^{tree}) &&
 486         git -C promisor-remote fetch --keep "file://$(pwd)/server" "$TREE_HASH" &&
 487         git -C promisor-remote count-objects -v >object-count &&
 488         test_i18ngrep "count: 0" object-count &&
 489         test_i18ngrep "in-pack: 2" object-count &&
 490
 491         # Set it as the promisor remote of client. Thus, whenever
 492         # the client lazy fetches, the lazy fetch will succeed only if it is
 493         # for this tree or blob.
 494         test_commit -C promisor-remote one && # so that ref advertisement is not empty
 495         git -C promisor-remote config --local uploadpack.allowanysha1inwant 1 &&
 496         git -C client remote set-url origin "file://$(pwd)/promisor-remote"
 497 }
 498
 499 # NEEDSWORK: The tests beginning with "fetch lazy-fetches" below only
 500 # test that "fetch" avoid fetching trees and blobs, but not commits or
 501 # tags. Revisit this if Git is ever taught to support partial clones
 502 # with commits and/or tags filtered out.
 503
 504 test_expect_success 'fetch lazy-fetches only to resolve deltas' '
 505         setup_triangle &&
 506
 507         # Exercise to make sure it works. Git will not fetch anything from the
 508         # promisor remote other than for the big tree (because it needs to
 509         # resolve the delta).
 510         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 511                 fetch "file://$(pwd)/server" main &&
 512
 513         # Verify the assumption that the client needed to fetch the delta base
 514         # to resolve the delta.
 515         git -C server rev-parse HEAD~1^{tree} >hash &&
 516         grep "want $(cat hash)" trace
 517 '
 518
 519 test_expect_success 'fetch lazy-fetches only to resolve deltas, protocol v2' '
 520         setup_triangle &&
 521
 522         git -C server config --local protocol.version 2 &&
 523         git -C client config --local protocol.version 2 &&
 524         git -C promisor-remote config --local protocol.version 2 &&
 525
 526         # Exercise to make sure it works. Git will not fetch anything from the
 527         # promisor remote other than for the big blob (because it needs to
 528         # resolve the delta).
 529         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 530                 fetch "file://$(pwd)/server" main &&
 531
 532         # Verify that protocol version 2 was used.
 533         grep "fetch< version 2" trace &&
 534
 535         # Verify the assumption that the client needed to fetch the delta base
 536         # to resolve the delta.
 537         git -C server rev-parse HEAD~1^{tree} >hash &&
 538         grep "want $(cat hash)" trace
 539 '
 540
 541 test_expect_success 'fetch does not lazy-fetch missing targets of its refs' '
 542         rm -rf server client trace &&
 543
 544         test_create_repo server &&
 545         test_config -C server uploadpack.allowfilter 1 &&
 546         test_config -C server uploadpack.allowanysha1inwant 1 &&
 547         test_commit -C server foo &&
 548
 549         git clone --filter=blob:none "file://$(pwd)/server" client &&
 550         # Make all refs point to nothing by deleting all objects.
 551         rm client/.git/objects/pack/* &&
 552
 553         test_commit -C server bar &&
 554         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch \
 555                 --no-tags --recurse-submodules=no \
 556                 origin refs/tags/bar &&
 557         FOO_HASH=$(git -C server rev-parse foo) &&
 558         ! grep "want $FOO_HASH" trace
 559 '
 560
 561 # The following two tests must be in this order. It is important that
 562 # the srv.bare repository did not have tags during clone, but has tags
 563 # in the fetch.
 564
 565 test_expect_success 'verify fetch succeeds when asking for new tags' '
 566         git clone --filter=blob:none "file://$(pwd)/srv.bare" tag-test &&
 567         for i in I J K
 568         do
 569                 test_commit -C src $i &&
 570                 git -C src branch $i || return 1
 571         done &&
 572         git -C srv.bare fetch --tags origin +refs/heads/*:refs/heads/* &&
 573         git -C tag-test -c protocol.version=2 fetch --tags origin
 574 '
 575
 576 test_expect_success 'verify fetch downloads only one pack when updating refs' '
 577         git clone --filter=blob:none "file://$(pwd)/srv.bare" pack-test &&
 578         ls pack-test/.git/objects/pack/*pack >pack-list &&
 579         test_line_count = 2 pack-list &&
 580         for i in A B C
 581         do
 582                 test_commit -C src $i &&
 583                 git -C src branch $i || return 1
 584         done &&
 585         git -C srv.bare fetch origin +refs/heads/*:refs/heads/* &&
 586         git -C pack-test fetch origin &&
 587         ls pack-test/.git/objects/pack/*pack >pack-list &&
 588         test_line_count = 3 pack-list
 589 '
 590
 591 test_expect_success 'single-branch tag following respects partial clone' '
 592         git clone --single-branch -b B --filter=blob:none \
 593                 "file://$(pwd)/srv.bare" single &&
 594         git -C single rev-parse --verify refs/tags/B &&
 595         git -C single rev-parse --verify refs/tags/A &&
 596         test_must_fail git -C single rev-parse --verify refs/tags/C
 597 '
 598
 599 test_expect_success 'fetch from a partial clone, protocol v0' '
 600         rm -rf server client trace &&
 601
 602         # Pretend that the server is a partial clone
 603         git init server &&
 604         git -C server remote add a_remote "file://$(pwd)/" &&
 605         test_config -C server core.repositoryformatversion 1 &&
 606         test_config -C server extensions.partialclone a_remote &&
 607         test_config -C server protocol.version 0 &&
 608         test_commit -C server foo &&
 609
 610         # Fetch from the server
 611         git init client &&
 612         test_config -C client protocol.version 0 &&
 613         test_commit -C client bar &&
 614         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 615         ! grep "version 2" trace
 616 '
 617
 618 test_expect_success 'fetch from a partial clone, protocol v2' '
 619         rm -rf server client trace &&
 620
 621         # Pretend that the server is a partial clone
 622         git init server &&
 623         git -C server remote add a_remote "file://$(pwd)/" &&
 624         test_config -C server core.repositoryformatversion 1 &&
 625         test_config -C server extensions.partialclone a_remote &&
 626         test_config -C server protocol.version 2 &&
 627         test_commit -C server foo &&
 628
 629         # Fetch from the server
 630         git init client &&
 631         test_config -C client protocol.version 2 &&
 632         test_commit -C client bar &&
 633         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 634         grep "version 2" trace
 635 '
 636
 637 test_expect_success 'repack does not loosen promisor objects' '
 638         rm -rf client trace &&
 639         git clone --bare --filter=blob:none "file://$(pwd)/srv.bare" client &&
 640         test_when_finished "rm -rf client trace" &&
 641         GIT_TRACE2_PERF="$(pwd)/trace" git -C client repack -A -d &&
 642         grep "loosen_unused_packed_objects/loosened:0" trace
 643 '
 644
 645 . "$TEST_DIRECTORY"/lib-httpd.sh
 646 start_httpd
 647
 648 # Converts bytes into their hexadecimal representation. For example,
 649 # "printf 'ab\r\n' | hex_unpack" results in '61620d0a'.
 650 hex_unpack () {
 651         perl -e '$/ = undef; $input = <>; print unpack("H2" x length($input), $input)'
 652 }
 653
 654 # Inserts $1 at the start of the string and every 2 characters thereafter.
 655 intersperse () {
 656         sed 's/\(..\)/'$1'\1/g'
 657 }
 658
 659 # Create a one-time-perl command to replace the existing packfile with $1.
 660 replace_packfile () {
 661         # The protocol requires that the packfile be sent in sideband 1, hence
 662         # the extra \x01 byte at the beginning.
 663         cp $1 "$HTTPD_ROOT_PATH/one-time-pack" &&
 664         echo 'if (/packfile/) {
 665                 print;
 666                 my $length = -s "one-time-pack";
 667                 printf "%04x\x01", $length + 5;
 668                 print `cat one-time-pack` . "0000";
 669                 last
 670         }' >"$HTTPD_ROOT_PATH/one-time-perl"
 671 }
 672
 673 test_expect_success 'upon cloning, check that all refs point to objects' '
 674         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 675         rm -rf "$SERVER" repo &&
 676         test_create_repo "$SERVER" &&
 677         test_commit -C "$SERVER" foo &&
 678         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 679         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 680
 681         # Create a tag pointing to a blob.
 682         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 683         git -C "$SERVER" tag myblob "$BLOB" &&
 684
 685         # Craft a packfile not including that blob.
 686         git -C "$SERVER" rev-parse HEAD |
 687         git -C "$SERVER" pack-objects --stdout >incomplete.pack &&
 688
 689         # Replace the existing packfile with the crafted one. The protocol
 690         # requires that the packfile be sent in sideband 1, hence the extra
 691         # \x01 byte at the beginning.
 692         replace_packfile incomplete.pack &&
 693
 694         # Use protocol v2 because the perl command looks for the "packfile"
 695         # section header.
 696         test_config -C "$SERVER" protocol.version 2 &&
 697         test_must_fail git -c protocol.version=2 clone \
 698                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2>err &&
 699
 700         test_i18ngrep "did not send all necessary objects" err &&
 701
 702         # Ensure that the one-time-perl script was used.
 703         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 704 '
 705
 706 test_expect_success 'when partial cloning, tolerate server not sending target of tag' '
 707         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 708         rm -rf "$SERVER" repo &&
 709         test_create_repo "$SERVER" &&
 710         test_commit -C "$SERVER" foo &&
 711         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 712         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 713
 714         # Create an annotated tag pointing to a blob.
 715         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 716         git -C "$SERVER" tag -m message -a myblob "$BLOB" &&
 717
 718         # Craft a packfile including the tag, but not the blob it points to.
 719         # Also, omit objects referenced from HEAD in order to force a second
 720         # fetch (to fetch missing objects) upon the automatic checkout that
 721         # happens after a clone.
 722         printf "%s\n%s\n--not\n%s\n%s\n" \
 723                 $(git -C "$SERVER" rev-parse HEAD) \
 724                 $(git -C "$SERVER" rev-parse myblob) \
 725                 $(git -C "$SERVER" rev-parse HEAD^{tree}) \
 726                 $(git -C "$SERVER" rev-parse myblob^{blob}) |
 727                 git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack &&
 728
 729         # Replace the existing packfile with the crafted one. The protocol
 730         # requires that the packfile be sent in sideband 1, hence the extra
 731         # \x01 byte at the beginning.
 732         replace_packfile incomplete.pack &&
 733
 734         # Use protocol v2 because the perl command looks for the "packfile"
 735         # section header.
 736         test_config -C "$SERVER" protocol.version 2 &&
 737
 738         # Exercise to make sure it works.
 739         git -c protocol.version=2 clone \
 740                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2> err &&
 741         ! grep "missing object referenced by" err &&
 742
 743         # Ensure that the one-time-perl script was used.
 744         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 745 '
 746
 747 test_expect_success 'tolerate server sending REF_DELTA against missing promisor objects' '
 748         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 749         rm -rf "$SERVER" repo &&
 750         test_create_repo "$SERVER" &&
 751         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 752         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 753
 754         # Create a commit with 2 blobs to be used as delta bases.
 755         for i in $(test_seq 10)
 756         do
 757                 echo "this is a line" >>"$SERVER/foo.txt" &&
 758                 echo "this is another line" >>"$SERVER/have.txt" || return 1
 759         done &&
 760         git -C "$SERVER" add foo.txt have.txt &&
 761         git -C "$SERVER" commit -m bar &&
 762         git -C "$SERVER" rev-parse HEAD:foo.txt >deltabase_missing &&
 763         git -C "$SERVER" rev-parse HEAD:have.txt >deltabase_have &&
 764
 765         # Clone. The client has deltabase_have but not deltabase_missing.
 766         git -c protocol.version=2 clone --no-checkout \
 767                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo &&
 768         git -C repo hash-object -w -- "$SERVER/have.txt" &&
 769
 770         # Sanity check to ensure that the client does not have
 771         # deltabase_missing.
 772         git -C repo rev-list --objects --ignore-missing \
 773                 -- $(cat deltabase_missing) >objlist &&
 774         test_line_count = 0 objlist &&
 775
 776         # Another commit. This commit will be fetched by the client.
 777         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/foo.txt" &&
 778         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/have.txt" &&
 779         git -C "$SERVER" add foo.txt have.txt &&
 780         git -C "$SERVER" commit -m baz &&
 781
 782         # Pack a thin pack containing, among other things, HEAD:foo.txt
 783         # delta-ed against HEAD^:foo.txt and HEAD:have.txt delta-ed against
 784         # HEAD^:have.txt.
 785         printf "%s\n--not\n%s\n" \
 786                 $(git -C "$SERVER" rev-parse HEAD) \
 787                 $(git -C "$SERVER" rev-parse HEAD^) |
 788                 git -C "$SERVER" pack-objects --thin --stdout >thin.pack &&
 789
 790         # Ensure that the pack contains one delta against HEAD^:foo.txt. Since
 791         # the delta contains at least 26 novel characters, the size cannot be
 792         # contained in 4 bits, so the object header will take up 2 bytes. The
 793         # most significant nybble of the first byte is 0b1111 (0b1 to indicate
 794         # that the header continues, and 0b111 to indicate REF_DELTA), followed
 795         # by any 3 nybbles, then the OID of the delta base.
 796         printf "f.,..%s" $(intersperse "," <deltabase_missing) >want &&
 797         hex_unpack <thin.pack | intersperse "," >have &&
 798         grep $(cat want) have &&
 799
 800         # Ensure that the pack contains one delta against HEAD^:have.txt,
 801         # similar to the above.
 802         printf "f.,..%s" $(intersperse "," <deltabase_have) >want &&
 803         hex_unpack <thin.pack | intersperse "," >have &&
 804         grep $(cat want) have &&
 805
 806         replace_packfile thin.pack &&
 807
 808         # Use protocol v2 because the perl command looks for the "packfile"
 809         # section header.
 810         test_config -C "$SERVER" protocol.version 2 &&
 811
 812         # Fetch the thin pack and ensure that index-pack is able to handle the
 813         # REF_DELTA object with a missing promisor delta base.
 814         GIT_TRACE_PACKET="$(pwd)/trace" git -C repo -c protocol.version=2 fetch &&
 815
 816         # Ensure that the missing delta base was directly fetched, but not the
 817         # one that the client has.
 818         grep "want $(cat deltabase_missing)" trace &&
 819         ! grep "want $(cat deltabase_have)" trace &&
 820
 821         # Ensure that the one-time-perl script was used.
 822         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 823 '
 824
 825 # DO NOT add non-httpd-specific tests here, because the last part of this
 826 # test script is only executed when httpd is available and enabled.
 827
 828 test_done