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