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_PASSES_SANITIZE_LEAK=true
   9 . ./test-lib.sh
  10
  11 # create a normal "src" repo where we can later create new commits.
  12 # expect_1.oids will contain a list of the OIDs of all blobs.
  13 test_expect_success 'setup normal src repo' '
  14         echo "{print \$1}" >print_1.awk &&
  15         echo "{print \$2}" >print_2.awk &&
  16
  17         git init src &&
  18         for n in 1 2 3 4
  19         do
  20                 echo "This is file: $n" > src/file.$n.txt &&
  21                 git -C src add file.$n.txt &&
  22                 git -C src commit -m "file $n" &&
  23                 git -C src ls-files -s file.$n.txt >>temp || return 1
  24         done &&
  25         awk -f print_2.awk <temp | sort >expect_1.oids &&
  26         test_line_count = 4 expect_1.oids
  27 '
  28
  29 # bare clone "src" giving "srv.bare" for use as our server.
  30 test_expect_success 'setup bare clone for server' '
  31         git clone --bare "file://$(pwd)/src" srv.bare &&
  32         git -C srv.bare config --local uploadpack.allowfilter 1 &&
  33         git -C srv.bare config --local uploadpack.allowanysha1inwant 1
  34 '
  35
  36 # do basic partial clone from "srv.bare"
  37 # confirm we are missing all of the known blobs.
  38 # confirm partial clone was registered in the local config.
  39 test_expect_success 'do partial clone 1' '
  40         git clone --no-checkout --filter=blob:none "file://$(pwd)/srv.bare" pc1 &&
  41
  42         git -C pc1 rev-list --quiet --objects --missing=print HEAD >revs &&
  43         awk -f print_1.awk revs |
  44         sed "s/?//" |
  45         sort >observed.oids &&
  46
  47         test_cmp expect_1.oids observed.oids &&
  48         test "$(git -C pc1 config --local core.repositoryformatversion)" = "1" &&
  49         test "$(git -C pc1 config --local remote.origin.promisor)" = "true" &&
  50         test "$(git -C pc1 config --local remote.origin.partialclonefilter)" = "blob:none"
  51 '
  52
  53 test_expect_success 'rev-list --missing=allow-promisor on partial clone' '
  54         git -C pc1 rev-list --objects --missing=allow-promisor HEAD >actual &&
  55         git -C pc1 rev-list --objects --missing=print HEAD >expect.raw &&
  56         grep -v "^?" expect.raw >expect &&
  57         test_cmp expect actual
  58 '
  59
  60 test_expect_success 'verify that .promisor file contains refs fetched' '
  61         ls pc1/.git/objects/pack/pack-*.promisor >promisorlist &&
  62         test_line_count = 1 promisorlist &&
  63         git -C srv.bare rev-parse --verify HEAD >headhash &&
  64         grep "$(cat headhash) HEAD" $(cat promisorlist) &&
  65         grep "$(cat headhash) refs/heads/main" $(cat promisorlist)
  66 '
  67
  68 # checkout main to force dynamic object fetch of blobs at HEAD.
  69 test_expect_success 'verify checkout with dynamic object fetch' '
  70         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  71         test_line_count = 4 observed &&
  72         git -C pc1 checkout main &&
  73         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  74         test_line_count = 0 observed
  75 '
  76
  77 # create new commits in "src" repo to establish a blame history on file.1.txt
  78 # and push to "srv.bare".
  79 test_expect_success 'push new commits to server' '
  80         git -C src remote add srv "file://$(pwd)/srv.bare" &&
  81         for x in a b c d e
  82         do
  83                 echo "Mod file.1.txt $x" >>src/file.1.txt &&
  84                 git -C src add file.1.txt &&
  85                 git -C src commit -m "mod $x" || return 1
  86         done &&
  87         git -C src blame main -- file.1.txt >expect.blame &&
  88         git -C src push -u srv main
  89 '
  90
  91 # (partial) fetch in the partial clone repo from the promisor remote.
  92 # verify that fetch inherited the filter-spec from the config and DOES NOT
  93 # have the new blobs.
  94 test_expect_success 'partial fetch inherits filter settings' '
  95         git -C pc1 fetch origin &&
  96         git -C pc1 rev-list --quiet --objects --missing=print \
  97                 main..origin/main >observed &&
  98         test_line_count = 5 observed
  99 '
 100
 101 # force dynamic object fetch using diff.
 102 # we should only get 1 new blob (for the file in origin/main).
 103 test_expect_success 'verify diff causes dynamic object fetch' '
 104         git -C pc1 diff main..origin/main -- file.1.txt &&
 105         git -C pc1 rev-list --quiet --objects --missing=print \
 106                  main..origin/main >observed &&
 107         test_line_count = 4 observed
 108 '
 109
 110 # force full dynamic object fetch of the file's history using blame.
 111 # we should get the intermediate blobs for the file.
 112 test_expect_success 'verify blame causes dynamic object fetch' '
 113         git -C pc1 blame origin/main -- file.1.txt >observed.blame &&
 114         test_cmp expect.blame observed.blame &&
 115         git -C pc1 rev-list --quiet --objects --missing=print \
 116                 main..origin/main >observed &&
 117         test_line_count = 0 observed
 118 '
 119
 120 # create new commits in "src" repo to establish a history on file.2.txt
 121 # and push to "srv.bare".
 122 test_expect_success 'push new commits to server for file.2.txt' '
 123         for x in a b c d e f
 124         do
 125                 echo "Mod file.2.txt $x" >>src/file.2.txt &&
 126                 git -C src add file.2.txt &&
 127                 git -C src commit -m "mod $x" || return 1
 128         done &&
 129         git -C src push -u srv main
 130 '
 131
 132 # Do FULL fetch by disabling inherited filter-spec using --no-filter.
 133 # Verify we have all the new blobs.
 134 test_expect_success 'override inherited filter-spec using --no-filter' '
 135         git -C pc1 fetch --no-filter origin &&
 136         git -C pc1 rev-list --quiet --objects --missing=print \
 137                 main..origin/main >observed &&
 138         test_line_count = 0 observed
 139 '
 140
 141 # create new commits in "src" repo to establish a history on file.3.txt
 142 # and push to "srv.bare".
 143 test_expect_success 'push new commits to server for file.3.txt' '
 144         for x in a b c d e f
 145         do
 146                 echo "Mod file.3.txt $x" >>src/file.3.txt &&
 147                 git -C src add file.3.txt &&
 148                 git -C src commit -m "mod $x" || return 1
 149         done &&
 150         git -C src push -u srv main
 151 '
 152
 153 # Do a partial fetch and then try to manually fetch the missing objects.
 154 # This can be used as the basis of a pre-command hook to bulk fetch objects
 155 # perhaps combined with a command in dry-run mode.
 156 test_expect_success 'manual prefetch of missing objects' '
 157         git -C pc1 fetch --filter=blob:none origin &&
 158
 159         git -C pc1 rev-list --quiet --objects --missing=print \
 160                  main..origin/main >revs &&
 161         awk -f print_1.awk revs |
 162         sed "s/?//" |
 163         sort >observed.oids &&
 164
 165         test_line_count = 6 observed.oids &&
 166         git -C pc1 fetch-pack --stdin "file://$(pwd)/srv.bare" <observed.oids &&
 167
 168         git -C pc1 rev-list --quiet --objects --missing=print \
 169                 main..origin/main >revs &&
 170         awk -f print_1.awk revs |
 171         sed "s/?//" |
 172         sort >observed.oids &&
 173
 174         test_line_count = 0 observed.oids
 175 '
 176
 177 # create new commits in "src" repo to establish a history on file.4.txt
 178 # and push to "srv.bare".
 179 test_expect_success 'push new commits to server for file.4.txt' '
 180         for x in a b c d e f
 181         do
 182                 echo "Mod file.4.txt $x" >src/file.4.txt &&
 183                 if list_contains "a,b" "$x"; then
 184                         printf "%10000s" X >>src/file.4.txt
 185                 fi &&
 186                 if list_contains "c,d" "$x"; then
 187                         printf "%20000s" X >>src/file.4.txt
 188                 fi &&
 189                 git -C src add file.4.txt &&
 190                 git -C src commit -m "mod $x" || return 1
 191         done &&
 192         git -C src push -u srv main
 193 '
 194
 195 # Do partial fetch to fetch smaller files; then verify that without --refetch
 196 # applying a new filter does not refetch missing large objects. Then use
 197 # --refetch to apply the new filter on existing commits. Test it under both
 198 # protocol v2 & v0.
 199 test_expect_success 'apply a different filter using --refetch' '
 200         git -C pc1 fetch --filter=blob:limit=999 origin &&
 201         git -C pc1 rev-list --quiet --objects --missing=print \
 202                 main..origin/main >observed &&
 203         test_line_count = 4 observed &&
 204
 205         git -C pc1 fetch --filter=blob:limit=19999 --refetch origin &&
 206         git -C pc1 rev-list --quiet --objects --missing=print \
 207                 main..origin/main >observed &&
 208         test_line_count = 2 observed &&
 209
 210         git -c protocol.version=0 -C pc1 fetch --filter=blob:limit=29999 \
 211                 --refetch origin &&
 212         git -C pc1 rev-list --quiet --objects --missing=print \
 213                 main..origin/main >observed &&
 214         test_line_count = 0 observed
 215 '
 216
 217 test_expect_success 'fetch --refetch works with a shallow clone' '
 218         git clone --no-checkout --depth=1 --filter=blob:none "file://$(pwd)/srv.bare" pc1s &&
 219         git -C pc1s rev-list --objects --missing=print HEAD >observed &&
 220         test_line_count = 6 observed &&
 221
 222         GIT_TRACE=1 git -C pc1s fetch --filter=blob:limit=999 --refetch origin &&
 223         git -C pc1s rev-list --objects --missing=print HEAD >observed &&
 224         test_line_count = 6 observed
 225 '
 226
 227 test_expect_success 'fetch --refetch triggers repacking' '
 228         GIT_TRACE2_CONFIG_PARAMS=gc.autoPackLimit,maintenance.incremental-repack.auto &&
 229         export GIT_TRACE2_CONFIG_PARAMS &&
 230
 231         GIT_TRACE2_EVENT="$PWD/trace1.event" \
 232         git -C pc1 fetch --refetch origin &&
 233         test_subcommand git maintenance run --auto --no-quiet --detach <trace1.event &&
 234         grep \"param\":\"gc.autopacklimit\",\"value\":\"1\" trace1.event &&
 235         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"-1\" trace1.event &&
 236
 237         GIT_TRACE2_EVENT="$PWD/trace2.event" \
 238         git -c protocol.version=0 \
 239                 -c gc.autoPackLimit=0 \
 240                 -c maintenance.incremental-repack.auto=1234 \
 241                 -C pc1 fetch --refetch origin &&
 242         test_subcommand git maintenance run --auto --no-quiet --detach <trace2.event &&
 243         grep \"param\":\"gc.autopacklimit\",\"value\":\"0\" trace2.event &&
 244         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"-1\" trace2.event &&
 245
 246         GIT_TRACE2_EVENT="$PWD/trace3.event" \
 247         git -c protocol.version=0 \
 248                 -c gc.autoPackLimit=1234 \
 249                 -c maintenance.incremental-repack.auto=0 \
 250                 -C pc1 fetch --refetch origin &&
 251         test_subcommand git maintenance run --auto --no-quiet --detach <trace3.event &&
 252         grep \"param\":\"gc.autopacklimit\",\"value\":\"1\" trace3.event &&
 253         grep \"param\":\"maintenance.incremental-repack.auto\",\"value\":\"0\" trace3.event
 254 '
 255
 256 test_expect_success 'partial clone with transfer.fsckobjects=1 works with submodules' '
 257         test_create_repo submodule &&
 258         test_commit -C submodule mycommit &&
 259
 260         test_create_repo src_with_sub &&
 261         git -C src_with_sub config uploadpack.allowfilter 1 &&
 262         git -C src_with_sub config uploadpack.allowanysha1inwant 1 &&
 263
 264         test_config_global protocol.file.allow always &&
 265
 266         git -C src_with_sub submodule add "file://$(pwd)/submodule" mysub &&
 267         git -C src_with_sub commit -m "commit with submodule" &&
 268
 269         git -c transfer.fsckobjects=1 \
 270                 clone --filter="blob:none" "file://$(pwd)/src_with_sub" dst &&
 271         test_when_finished rm -rf dst
 272 '
 273
 274 test_expect_success 'lazily fetched .gitmodules works' '
 275         git clone --filter="blob:none" --no-checkout "file://$(pwd)/src_with_sub" dst &&
 276         git -C dst fetch &&
 277         test_when_finished rm -rf dst
 278 '
 279
 280 test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack --fsck-objects' '
 281         git init src &&
 282         test_commit -C src x &&
 283         test_config -C src uploadpack.allowfilter 1 &&
 284         test_config -C src uploadpack.allowanysha1inwant 1 &&
 285
 286         GIT_TRACE="$(pwd)/trace" git -c transfer.fsckobjects=1 \
 287                 clone --filter="blob:none" "file://$(pwd)/src" dst &&
 288         grep "git index-pack.*--fsck-objects" trace
 289 '
 290
 291 test_expect_success 'use fsck before and after manually fetching a missing subtree' '
 292         # push new commit so server has a subtree
 293         mkdir src/dir &&
 294         echo "in dir" >src/dir/file.txt &&
 295         git -C src add dir/file.txt &&
 296         git -C src commit -m "file in dir" &&
 297         git -C src push -u srv main &&
 298         SUBTREE=$(git -C src rev-parse HEAD:dir) &&
 299
 300         rm -rf dst &&
 301         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" dst &&
 302         git -C dst fsck &&
 303
 304         # Make sure we only have commits, and all trees and blobs are missing.
 305         git -C dst rev-list --missing=allow-any --objects main \
 306                 >fetched_objects &&
 307         awk -f print_1.awk fetched_objects |
 308         xargs -n1 git -C dst cat-file -t >fetched_types &&
 309
 310         sort -u fetched_types >unique_types.observed &&
 311         echo commit >unique_types.expected &&
 312         test_cmp unique_types.expected unique_types.observed &&
 313
 314         # Auto-fetch a tree with cat-file.
 315         git -C dst cat-file -p $SUBTREE >tree_contents &&
 316         grep file.txt tree_contents &&
 317
 318         # fsck still works after an auto-fetch of a tree.
 319         git -C dst fsck &&
 320
 321         # Auto-fetch all remaining trees and blobs with --missing=error
 322         git -C dst rev-list --missing=error --objects main >fetched_objects &&
 323         test_line_count = 88 fetched_objects &&
 324
 325         awk -f print_1.awk fetched_objects |
 326         xargs -n1 git -C dst cat-file -t >fetched_types &&
 327
 328         sort -u fetched_types >unique_types.observed &&
 329         test_write_lines blob commit tree >unique_types.expected &&
 330         test_cmp unique_types.expected unique_types.observed
 331 '
 332
 333 test_expect_success 'implicitly construct combine: filter with repeated flags' '
 334         GIT_TRACE=$(pwd)/trace git clone --bare \
 335                 --filter=blob:none --filter=tree:1 \
 336                 "file://$(pwd)/srv.bare" pc2 &&
 337         grep "trace:.* git pack-objects .*--filter=combine:blob:none+tree:1" \
 338                 trace &&
 339         git -C pc2 rev-list --objects --missing=allow-any HEAD >objects &&
 340
 341         # We should have gotten some root trees.
 342         grep " $" objects &&
 343         # Should not have gotten any non-root trees or blobs.
 344         ! grep " ." objects &&
 345
 346         xargs -n 1 git -C pc2 cat-file -t <objects >types &&
 347         sort -u types >unique_types.actual &&
 348         test_write_lines commit tree >unique_types.expected &&
 349         test_cmp unique_types.expected unique_types.actual
 350 '
 351
 352 test_expect_success 'upload-pack complains of bogus filter config' '
 353         printf 0000 |
 354         test_must_fail git \
 355                 -c uploadpackfilter.tree.maxdepth \
 356                 upload-pack . >/dev/null 2>err &&
 357         test_grep "unable to parse.*tree.maxdepth" err
 358 '
 359
 360 test_expect_success 'upload-pack fails banned object filters' '
 361         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 362         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 363                 "file://$(pwd)/srv.bare" pc3 2>err &&
 364         test_grep "filter '\''blob:none'\'' not supported" err
 365 '
 366
 367 test_expect_success 'upload-pack fails banned combine object filters' '
 368         test_config -C srv.bare uploadpackfilter.allow false &&
 369         test_config -C srv.bare uploadpackfilter.combine.allow true &&
 370         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 371         test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 372         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 373                 --filter=blob:none "file://$(pwd)/srv.bare" pc3 2>err &&
 374         test_grep "filter '\''blob:none'\'' not supported" err
 375 '
 376
 377 test_expect_success 'upload-pack fails banned object filters with fallback' '
 378         test_config -C srv.bare uploadpackfilter.allow false &&
 379         test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
 380                 "file://$(pwd)/srv.bare" pc3 2>err &&
 381         test_grep "filter '\''blob:none'\'' not supported" err
 382 '
 383
 384 test_expect_success 'upload-pack limits tree depth filters' '
 385         test_config -C srv.bare uploadpackfilter.allow false &&
 386         test_config -C srv.bare uploadpackfilter.tree.allow true &&
 387         test_config -C srv.bare uploadpackfilter.tree.maxDepth 0 &&
 388         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:1 \
 389                 "file://$(pwd)/srv.bare" pc3 2>err &&
 390         test_grep "tree filter allows max depth 0, but got 1" err &&
 391
 392         git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" pc4 &&
 393
 394         test_config -C srv.bare uploadpackfilter.tree.maxDepth 5 &&
 395         git clone --no-checkout --filter=tree:5 "file://$(pwd)/srv.bare" pc5 &&
 396         test_must_fail ok=sigpipe git clone --no-checkout --filter=tree:6 \
 397                 "file://$(pwd)/srv.bare" pc6 2>err &&
 398         test_grep "tree filter allows max depth 5, but got 6" err
 399 '
 400
 401 test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' '
 402         rm -rf src dst &&
 403         git init src &&
 404         test_commit -C src x &&
 405         test_config -C src uploadpack.allowfilter 1 &&
 406         test_config -C src uploadpack.allowanysha1inwant 1 &&
 407
 408         # Create a tag pointing to a blob.
 409         BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) &&
 410         git -C src tag myblob "$BLOB" &&
 411
 412         git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err &&
 413         ! grep "does not point to a valid object" err &&
 414         git -C dst fsck
 415 '
 416
 417 test_expect_success 'fetch what is specified on CLI even if already promised' '
 418         rm -rf src dst.git &&
 419         git init src &&
 420         test_commit -C src foo &&
 421         test_config -C src uploadpack.allowfilter 1 &&
 422         test_config -C src uploadpack.allowanysha1inwant 1 &&
 423
 424         git hash-object --stdin <src/foo.t >blob &&
 425
 426         git clone --bare --filter=blob:none "file://$(pwd)/src" dst.git &&
 427         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_before &&
 428         grep "?$(cat blob)" missing_before &&
 429         git -C dst.git fetch origin $(cat blob) &&
 430         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_after &&
 431         ! grep "?$(cat blob)" missing_after
 432 '
 433
 434 test_expect_success 'setup src repo for sparse filter' '
 435         git init sparse-src &&
 436         git -C sparse-src config --local uploadpack.allowfilter 1 &&
 437         git -C sparse-src config --local uploadpack.allowanysha1inwant 1 &&
 438         test_commit -C sparse-src one &&
 439         test_commit -C sparse-src two &&
 440         echo /one.t >sparse-src/only-one &&
 441         git -C sparse-src add . &&
 442         git -C sparse-src commit -m "add sparse checkout files"
 443 '
 444
 445 test_expect_success 'partial clone with sparse filter succeeds' '
 446         rm -rf dst.git &&
 447         git clone --no-local --bare \
 448                   --filter=sparse:oid=main:only-one \
 449                   sparse-src dst.git &&
 450         (
 451                 cd dst.git &&
 452                 git rev-list --objects --missing=print HEAD >out &&
 453                 grep "^$(git rev-parse HEAD:one.t)" out &&
 454                 grep "^?$(git rev-parse HEAD:two.t)" out
 455         )
 456 '
 457
 458 test_expect_success 'partial clone with unresolvable sparse filter fails cleanly' '
 459         rm -rf dst.git &&
 460         test_must_fail git clone --no-local --bare \
 461                                  --filter=sparse:oid=main:no-such-name \
 462                                  sparse-src dst.git 2>err &&
 463         test_grep "unable to access sparse blob in .main:no-such-name" err &&
 464         test_must_fail git clone --no-local --bare \
 465                                  --filter=sparse:oid=main \
 466                                  sparse-src dst.git 2>err &&
 467         test_grep "unable to parse sparse filter data in" err
 468 '
 469
 470 setup_triangle () {
 471         rm -rf big-blob.txt server client promisor-remote &&
 472
 473         printf "line %d\n" $(test_seq 1 100) >big-blob.txt &&
 474
 475         # Create a server with 2 commits: a commit with a big tree and a child
 476         # commit with an incremental change. Also, create a partial clone
 477         # client that only contains the first commit.
 478         git init server &&
 479         git -C server config --local uploadpack.allowfilter 1 &&
 480         for i in $(test_seq 1 100)
 481         do
 482                 echo "make the tree big" >server/file$i &&
 483                 git -C server add file$i || return 1
 484         done &&
 485         git -C server commit -m "initial" &&
 486         git clone --bare --filter=tree:0 "file://$(pwd)/server" client &&
 487         echo another line >>server/file1 &&
 488         git -C server commit -am "incremental change" &&
 489
 490         # Create a promisor remote that only contains the tree and blob from
 491         # the first commit.
 492         git init promisor-remote &&
 493         git -C server config --local uploadpack.allowanysha1inwant 1 &&
 494         TREE_HASH=$(git -C server rev-parse HEAD~1^{tree}) &&
 495         git -C promisor-remote fetch --keep "file://$(pwd)/server" "$TREE_HASH" &&
 496         git -C promisor-remote count-objects -v >object-count &&
 497         test_grep "count: 0" object-count &&
 498         test_grep "in-pack: 2" object-count &&
 499
 500         # Set it as the promisor remote of client. Thus, whenever
 501         # the client lazy fetches, the lazy fetch will succeed only if it is
 502         # for this tree or blob.
 503         test_commit -C promisor-remote one && # so that ref advertisement is not empty
 504         git -C promisor-remote config --local uploadpack.allowanysha1inwant 1 &&
 505         git -C client remote set-url origin "file://$(pwd)/promisor-remote"
 506 }
 507
 508 # NEEDSWORK: The tests beginning with "fetch lazy-fetches" below only
 509 # test that "fetch" avoid fetching trees and blobs, but not commits or
 510 # tags. Revisit this if Git is ever taught to support partial clones
 511 # with commits and/or tags filtered out.
 512
 513 test_expect_success 'fetch lazy-fetches only to resolve deltas' '
 514         setup_triangle &&
 515
 516         # Exercise to make sure it works. Git will not fetch anything from the
 517         # promisor remote other than for the big tree (because it needs to
 518         # resolve the delta).
 519         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 520                 fetch "file://$(pwd)/server" main &&
 521
 522         # Verify the assumption that the client needed to fetch the delta base
 523         # to resolve the delta.
 524         git -C server rev-parse HEAD~1^{tree} >hash &&
 525         grep "want $(cat hash)" trace
 526 '
 527
 528 test_expect_success 'fetch lazy-fetches only to resolve deltas, protocol v2' '
 529         setup_triangle &&
 530
 531         git -C server config --local protocol.version 2 &&
 532         git -C client config --local protocol.version 2 &&
 533         git -C promisor-remote config --local protocol.version 2 &&
 534
 535         # Exercise to make sure it works. Git will not fetch anything from the
 536         # promisor remote other than for the big blob (because it needs to
 537         # resolve the delta).
 538         GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
 539                 fetch "file://$(pwd)/server" main &&
 540
 541         # Verify that protocol version 2 was used.
 542         grep "fetch< version 2" trace &&
 543
 544         # Verify the assumption that the client needed to fetch the delta base
 545         # to resolve the delta.
 546         git -C server rev-parse HEAD~1^{tree} >hash &&
 547         grep "want $(cat hash)" trace
 548 '
 549
 550 test_expect_success 'fetch does not lazy-fetch missing targets of its refs' '
 551         rm -rf server client trace &&
 552
 553         test_create_repo server &&
 554         test_config -C server uploadpack.allowfilter 1 &&
 555         test_config -C server uploadpack.allowanysha1inwant 1 &&
 556         test_commit -C server foo &&
 557
 558         git clone --filter=blob:none "file://$(pwd)/server" client &&
 559         # Make all refs point to nothing by deleting all objects.
 560         rm client/.git/objects/pack/* &&
 561
 562         test_commit -C server bar &&
 563         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch \
 564                 --no-tags --recurse-submodules=no \
 565                 origin refs/tags/bar &&
 566         FOO_HASH=$(git -C server rev-parse foo) &&
 567         ! grep "want $FOO_HASH" trace
 568 '
 569
 570 # The following two tests must be in this order. It is important that
 571 # the srv.bare repository did not have tags during clone, but has tags
 572 # in the fetch.
 573
 574 test_expect_success 'verify fetch succeeds when asking for new tags' '
 575         git clone --filter=blob:none "file://$(pwd)/srv.bare" tag-test &&
 576         for i in I J K
 577         do
 578                 test_commit -C src $i &&
 579                 git -C src branch $i || return 1
 580         done &&
 581         git -C srv.bare fetch --tags origin +refs/heads/*:refs/heads/* &&
 582         git -C tag-test -c protocol.version=2 fetch --tags origin
 583 '
 584
 585 test_expect_success 'verify fetch downloads only one pack when updating refs' '
 586         git clone --filter=blob:none "file://$(pwd)/srv.bare" pack-test &&
 587         ls pack-test/.git/objects/pack/*pack >pack-list &&
 588         test_line_count = 2 pack-list &&
 589         for i in A B C
 590         do
 591                 test_commit -C src $i &&
 592                 git -C src branch $i || return 1
 593         done &&
 594         git -C srv.bare fetch origin +refs/heads/*:refs/heads/* &&
 595         git -C pack-test fetch origin &&
 596         ls pack-test/.git/objects/pack/*pack >pack-list &&
 597         test_line_count = 3 pack-list
 598 '
 599
 600 test_expect_success 'single-branch tag following respects partial clone' '
 601         git clone --single-branch -b B --filter=blob:none \
 602                 "file://$(pwd)/srv.bare" single &&
 603         git -C single rev-parse --verify refs/tags/B &&
 604         git -C single rev-parse --verify refs/tags/A &&
 605         test_must_fail git -C single rev-parse --verify refs/tags/C
 606 '
 607
 608 test_expect_success 'fetch from a partial clone, protocol v0' '
 609         rm -rf server client trace &&
 610
 611         # Pretend that the server is a partial clone
 612         git init server &&
 613         git -C server remote add a_remote "file://$(pwd)/" &&
 614         test_config -C server core.repositoryformatversion 1 &&
 615         test_config -C server extensions.partialclone a_remote &&
 616         test_config -C server protocol.version 0 &&
 617         test_commit -C server foo &&
 618
 619         # Fetch from the server
 620         git init client &&
 621         test_config -C client protocol.version 0 &&
 622         test_commit -C client bar &&
 623         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 624         ! grep "version 2" trace
 625 '
 626
 627 test_expect_success 'fetch from a partial clone, protocol v2' '
 628         rm -rf server client trace &&
 629
 630         # Pretend that the server is a partial clone
 631         git init server &&
 632         git -C server remote add a_remote "file://$(pwd)/" &&
 633         test_config -C server core.repositoryformatversion 1 &&
 634         test_config -C server extensions.partialclone a_remote &&
 635         test_config -C server protocol.version 2 &&
 636         test_commit -C server foo &&
 637
 638         # Fetch from the server
 639         git init client &&
 640         test_config -C client protocol.version 2 &&
 641         test_commit -C client bar &&
 642         GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
 643         grep "version 2" trace
 644 '
 645
 646 test_expect_success 'repack does not loosen promisor objects' '
 647         rm -rf client trace &&
 648         git clone --bare --filter=blob:none "file://$(pwd)/srv.bare" client &&
 649         test_when_finished "rm -rf client trace" &&
 650         GIT_TRACE2_PERF="$(pwd)/trace" git -C client repack -A -d &&
 651         grep "loosen_unused_packed_objects/loosened:0" trace
 652 '
 653
 654 test_expect_success 'lazy-fetch in submodule succeeds' '
 655         # setup
 656         test_config_global protocol.file.allow always &&
 657
 658         test_when_finished "rm -rf src-sub" &&
 659         git init src-sub &&
 660         git -C src-sub config uploadpack.allowfilter 1 &&
 661         git -C src-sub config uploadpack.allowanysha1inwant 1 &&
 662
 663         # This blob must be missing in the subsequent commit.
 664         echo foo >src-sub/file &&
 665         git -C src-sub add file &&
 666         git -C src-sub commit -m "submodule one" &&
 667         SUB_ONE=$(git -C src-sub rev-parse HEAD) &&
 668
 669         echo bar >src-sub/file &&
 670         git -C src-sub add file &&
 671         git -C src-sub commit -m "submodule two" &&
 672         SUB_TWO=$(git -C src-sub rev-parse HEAD) &&
 673
 674         test_when_finished "rm -rf src-super" &&
 675         git init src-super &&
 676         git -C src-super config uploadpack.allowfilter 1 &&
 677         git -C src-super config uploadpack.allowanysha1inwant 1 &&
 678         git -C src-super submodule add ../src-sub src-sub &&
 679
 680         git -C src-super/src-sub checkout $SUB_ONE &&
 681         git -C src-super add src-sub &&
 682         git -C src-super commit -m "superproject one" &&
 683
 684         git -C src-super/src-sub checkout $SUB_TWO &&
 685         git -C src-super add src-sub &&
 686         git -C src-super commit -m "superproject two" &&
 687
 688         # the fetch
 689         test_when_finished "rm -rf client" &&
 690         git clone --filter=blob:none --also-filter-submodules \
 691                 --recurse-submodules "file://$(pwd)/src-super" client &&
 692
 693         # Trigger lazy-fetch from the superproject
 694         git -C client restore --recurse-submodules --source=HEAD^ :/
 695 '
 696
 697 test_expect_success 'after fetching descendants of non-promisor commits, gc works' '
 698         # Setup
 699         git init full &&
 700         git -C full config uploadpack.allowfilter 1 &&
 701         git -C full config uploadpack.allowanysha1inwant 1 &&
 702         touch full/foo &&
 703         git -C full add foo &&
 704         git -C full commit -m "commit 1" &&
 705         git -C full checkout --detach &&
 706
 707         # Partial clone and push commit to remote
 708         git clone "file://$(pwd)/full" --filter=blob:none partial &&
 709         echo "hello" > partial/foo &&
 710         git -C partial commit -a -m "commit 2" &&
 711         git -C partial push &&
 712
 713         # gc in partial repo
 714         git -C partial gc --prune=now &&
 715
 716         # Create another commit in normal repo
 717         git -C full checkout main &&
 718         echo " world" >> full/foo &&
 719         git -C full commit -a -m "commit 3" &&
 720
 721         # Pull from remote in partial repo, and run gc again
 722         git -C partial pull &&
 723         git -C partial gc --prune=now
 724 '
 725
 726
 727 . "$TEST_DIRECTORY"/lib-httpd.sh
 728 start_httpd
 729
 730 # Converts bytes into their hexadecimal representation. For example,
 731 # "printf 'ab\r\n' | hex_unpack" results in '61620d0a'.
 732 hex_unpack () {
 733         perl -e '$/ = undef; $input = <>; print unpack("H2" x length($input), $input)'
 734 }
 735
 736 # Inserts $1 at the start of the string and every 2 characters thereafter.
 737 intersperse () {
 738         sed 's/\(..\)/'$1'\1/g'
 739 }
 740
 741 # Create a one-time-perl command to replace the existing packfile with $1.
 742 replace_packfile () {
 743         # The protocol requires that the packfile be sent in sideband 1, hence
 744         # the extra \x01 byte at the beginning.
 745         cp $1 "$HTTPD_ROOT_PATH/one-time-pack" &&
 746         echo 'if (/packfile/) {
 747                 print;
 748                 my $length = -s "one-time-pack";
 749                 printf "%04x\x01", $length + 5;
 750                 print `cat one-time-pack` . "0000";
 751                 last
 752         }' >"$HTTPD_ROOT_PATH/one-time-perl"
 753 }
 754
 755 test_expect_success 'upon cloning, check that all refs point to objects' '
 756         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 757         rm -rf "$SERVER" repo &&
 758         test_create_repo "$SERVER" &&
 759         test_commit -C "$SERVER" foo &&
 760         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 761         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 762
 763         # Create a tag pointing to a blob.
 764         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 765         git -C "$SERVER" tag myblob "$BLOB" &&
 766
 767         # Craft a packfile not including that blob.
 768         git -C "$SERVER" rev-parse HEAD |
 769         git -C "$SERVER" pack-objects --stdout >incomplete.pack &&
 770
 771         # Replace the existing packfile with the crafted one. The protocol
 772         # requires that the packfile be sent in sideband 1, hence the extra
 773         # \x01 byte at the beginning.
 774         replace_packfile incomplete.pack &&
 775
 776         # Use protocol v2 because the perl command looks for the "packfile"
 777         # section header.
 778         test_config -C "$SERVER" protocol.version 2 &&
 779         test_must_fail git -c protocol.version=2 clone \
 780                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2>err &&
 781
 782         test_grep "did not send all necessary objects" err &&
 783
 784         # Ensure that the one-time-perl script was used.
 785         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 786 '
 787
 788 test_expect_success 'when partial cloning, tolerate server not sending target of tag' '
 789         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 790         rm -rf "$SERVER" repo &&
 791         test_create_repo "$SERVER" &&
 792         test_commit -C "$SERVER" foo &&
 793         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 794         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 795
 796         # Create an annotated tag pointing to a blob.
 797         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 798         git -C "$SERVER" tag -m message -a myblob "$BLOB" &&
 799
 800         # Craft a packfile including the tag, but not the blob it points to.
 801         # Also, omit objects referenced from HEAD in order to force a second
 802         # fetch (to fetch missing objects) upon the automatic checkout that
 803         # happens after a clone.
 804         printf "%s\n%s\n--not\n%s\n%s\n" \
 805                 $(git -C "$SERVER" rev-parse HEAD) \
 806                 $(git -C "$SERVER" rev-parse myblob) \
 807                 $(git -C "$SERVER" rev-parse HEAD^{tree}) \
 808                 $(git -C "$SERVER" rev-parse myblob^{blob}) |
 809                 git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack &&
 810
 811         # Replace the existing packfile with the crafted one. The protocol
 812         # requires that the packfile be sent in sideband 1, hence the extra
 813         # \x01 byte at the beginning.
 814         replace_packfile incomplete.pack &&
 815
 816         # Use protocol v2 because the perl command looks for the "packfile"
 817         # section header.
 818         test_config -C "$SERVER" protocol.version 2 &&
 819
 820         # Exercise to make sure it works.
 821         git -c protocol.version=2 clone \
 822                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo 2> err &&
 823         ! grep "missing object referenced by" err &&
 824
 825         # Ensure that the one-time-perl script was used.
 826         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 827 '
 828
 829 test_expect_success 'tolerate server sending REF_DELTA against missing promisor objects' '
 830         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 831         rm -rf "$SERVER" repo &&
 832         test_create_repo "$SERVER" &&
 833         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 834         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 835
 836         # Create a commit with 2 blobs to be used as delta bases.
 837         for i in $(test_seq 10)
 838         do
 839                 echo "this is a line" >>"$SERVER/foo.txt" &&
 840                 echo "this is another line" >>"$SERVER/have.txt" || return 1
 841         done &&
 842         git -C "$SERVER" add foo.txt have.txt &&
 843         git -C "$SERVER" commit -m bar &&
 844         git -C "$SERVER" rev-parse HEAD:foo.txt >deltabase_missing &&
 845         git -C "$SERVER" rev-parse HEAD:have.txt >deltabase_have &&
 846
 847         # Clone. The client has deltabase_have but not deltabase_missing.
 848         git -c protocol.version=2 clone --no-checkout \
 849                 --filter=blob:none $HTTPD_URL/one_time_perl/server repo &&
 850         git -C repo hash-object -w -- "$SERVER/have.txt" &&
 851
 852         # Sanity check to ensure that the client does not have
 853         # deltabase_missing.
 854         git -C repo rev-list --objects --ignore-missing \
 855                 -- $(cat deltabase_missing) >objlist &&
 856         test_line_count = 0 objlist &&
 857
 858         # Another commit. This commit will be fetched by the client.
 859         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/foo.txt" &&
 860         echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/have.txt" &&
 861         git -C "$SERVER" add foo.txt have.txt &&
 862         git -C "$SERVER" commit -m baz &&
 863
 864         # Pack a thin pack containing, among other things, HEAD:foo.txt
 865         # delta-ed against HEAD^:foo.txt and HEAD:have.txt delta-ed against
 866         # HEAD^:have.txt.
 867         printf "%s\n--not\n%s\n" \
 868                 $(git -C "$SERVER" rev-parse HEAD) \
 869                 $(git -C "$SERVER" rev-parse HEAD^) |
 870                 git -C "$SERVER" pack-objects --thin --stdout >thin.pack &&
 871
 872         # Ensure that the pack contains one delta against HEAD^:foo.txt. Since
 873         # the delta contains at least 26 novel characters, the size cannot be
 874         # contained in 4 bits, so the object header will take up 2 bytes. The
 875         # most significant nybble of the first byte is 0b1111 (0b1 to indicate
 876         # that the header continues, and 0b111 to indicate REF_DELTA), followed
 877         # by any 3 nybbles, then the OID of the delta base.
 878         printf "f.,..%s" $(intersperse "," <deltabase_missing) >want &&
 879         hex_unpack <thin.pack | intersperse "," >have &&
 880         grep $(cat want) have &&
 881
 882         # Ensure that the pack contains one delta against HEAD^:have.txt,
 883         # similar to the above.
 884         printf "f.,..%s" $(intersperse "," <deltabase_have) >want &&
 885         hex_unpack <thin.pack | intersperse "," >have &&
 886         grep $(cat want) have &&
 887
 888         replace_packfile thin.pack &&
 889
 890         # Use protocol v2 because the perl command looks for the "packfile"
 891         # section header.
 892         test_config -C "$SERVER" protocol.version 2 &&
 893
 894         # Fetch the thin pack and ensure that index-pack is able to handle the
 895         # REF_DELTA object with a missing promisor delta base.
 896         GIT_TRACE_PACKET="$(pwd)/trace" git -C repo -c protocol.version=2 fetch &&
 897
 898         # Ensure that the missing delta base was directly fetched, but not the
 899         # one that the client has.
 900         grep "want $(cat deltabase_missing)" trace &&
 901         ! grep "want $(cat deltabase_have)" trace &&
 902
 903         # Ensure that the one-time-perl script was used.
 904         ! test -e "$HTTPD_ROOT_PATH/one-time-perl"
 905 '
 906
 907 # DO NOT add non-httpd-specific tests here, because the last part of this
 908 # test script is only executed when httpd is available and enabled.
 909
 910 test_done