t/t5616-partial-clone.sh

   1 #!/bin/sh
   2
   3 test_description='git partial clone'
   4
   5 . ./test-lib.sh
   6
   7 # create a normal "src" repo where we can later create new commits.
   8 # expect_1.oids will contain a list of the OIDs of all blobs.
   9 test_expect_success 'setup normal src repo' '
  10         echo "{print \$1}" >print_1.awk &&
  11         echo "{print \$2}" >print_2.awk &&
  12
  13         git init src &&
  14         for n in 1 2 3 4
  15         do
  16                 echo "This is file: $n" > src/file.$n.txt
  17                 git -C src add file.$n.txt
  18                 git -C src commit -m "file $n"
  19                 git -C src ls-files -s file.$n.txt >>temp
  20         done &&
  21         awk -f print_2.awk <temp | sort >expect_1.oids &&
  22         test_line_count = 4 expect_1.oids
  23 '
  24
  25 # bare clone "src" giving "srv.bare" for use as our server.
  26 test_expect_success 'setup bare clone for server' '
  27         git clone --bare "file://$(pwd)/src" srv.bare &&
  28         git -C srv.bare config --local uploadpack.allowfilter 1 &&
  29         git -C srv.bare config --local uploadpack.allowanysha1inwant 1
  30 '
  31
  32 # do basic partial clone from "srv.bare"
  33 # confirm we are missing all of the known blobs.
  34 # confirm partial clone was registered in the local config.
  35 test_expect_success 'do partial clone 1' '
  36         git clone --no-checkout --filter=blob:none "file://$(pwd)/srv.bare" pc1 &&
  37
  38         git -C pc1 rev-list --quiet --objects --missing=print HEAD >revs &&
  39         awk -f print_1.awk revs |
  40         sed "s/?//" |
  41         sort >observed.oids &&
  42
  43         test_cmp expect_1.oids observed.oids &&
  44         test "$(git -C pc1 config --local core.repositoryformatversion)" = "1" &&
  45         test "$(git -C pc1 config --local extensions.partialclone)" = "origin" &&
  46         test "$(git -C pc1 config --local core.partialclonefilter)" = "blob:none"
  47 '
  48
  49 # checkout master to force dynamic object fetch of blobs at HEAD.
  50 test_expect_success 'verify checkout with dynamic object fetch' '
  51         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  52         test_line_count = 4 observed &&
  53         git -C pc1 checkout master &&
  54         git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed &&
  55         test_line_count = 0 observed
  56 '
  57
  58 # create new commits in "src" repo to establish a blame history on file.1.txt
  59 # and push to "srv.bare".
  60 test_expect_success 'push new commits to server' '
  61         git -C src remote add srv "file://$(pwd)/srv.bare" &&
  62         for x in a b c d e
  63         do
  64                 echo "Mod file.1.txt $x" >>src/file.1.txt
  65                 git -C src add file.1.txt
  66                 git -C src commit -m "mod $x"
  67         done &&
  68         git -C src blame master -- file.1.txt >expect.blame &&
  69         git -C src push -u srv master
  70 '
  71
  72 # (partial) fetch in the partial clone repo from the promisor remote.
  73 # verify that fetch inherited the filter-spec from the config and DOES NOT
  74 # have the new blobs.
  75 test_expect_success 'partial fetch inherits filter settings' '
  76         git -C pc1 fetch origin &&
  77         git -C pc1 rev-list --quiet --objects --missing=print \
  78                 master..origin/master >observed &&
  79         test_line_count = 5 observed
  80 '
  81
  82 # force dynamic object fetch using diff.
  83 # we should only get 1 new blob (for the file in origin/master).
  84 test_expect_success 'verify diff causes dynamic object fetch' '
  85         git -C pc1 diff master..origin/master -- file.1.txt &&
  86         git -C pc1 rev-list --quiet --objects --missing=print \
  87                  master..origin/master >observed &&
  88         test_line_count = 4 observed
  89 '
  90
  91 # force full dynamic object fetch of the file's history using blame.
  92 # we should get the intermediate blobs for the file.
  93 test_expect_success 'verify blame causes dynamic object fetch' '
  94         git -C pc1 blame origin/master -- file.1.txt >observed.blame &&
  95         test_cmp expect.blame observed.blame &&
  96         git -C pc1 rev-list --quiet --objects --missing=print \
  97                 master..origin/master >observed &&
  98         test_line_count = 0 observed
  99 '
 100
 101 # create new commits in "src" repo to establish a history on file.2.txt
 102 # and push to "srv.bare".
 103 test_expect_success 'push new commits to server for file.2.txt' '
 104         for x in a b c d e f
 105         do
 106                 echo "Mod file.2.txt $x" >>src/file.2.txt
 107                 git -C src add file.2.txt
 108                 git -C src commit -m "mod $x"
 109         done &&
 110         git -C src push -u srv master
 111 '
 112
 113 # Do FULL fetch by disabling inherited filter-spec using --no-filter.
 114 # Verify we have all the new blobs.
 115 test_expect_success 'override inherited filter-spec using --no-filter' '
 116         git -C pc1 fetch --no-filter origin &&
 117         git -C pc1 rev-list --quiet --objects --missing=print \
 118                 master..origin/master >observed &&
 119         test_line_count = 0 observed
 120 '
 121
 122 # create new commits in "src" repo to establish a history on file.3.txt
 123 # and push to "srv.bare".
 124 test_expect_success 'push new commits to server for file.3.txt' '
 125         for x in a b c d e f
 126         do
 127                 echo "Mod file.3.txt $x" >>src/file.3.txt
 128                 git -C src add file.3.txt
 129                 git -C src commit -m "mod $x"
 130         done &&
 131         git -C src push -u srv master
 132 '
 133
 134 # Do a partial fetch and then try to manually fetch the missing objects.
 135 # This can be used as the basis of a pre-command hook to bulk fetch objects
 136 # perhaps combined with a command in dry-run mode.
 137 test_expect_success 'manual prefetch of missing objects' '
 138         git -C pc1 fetch --filter=blob:none origin &&
 139
 140         git -C pc1 rev-list --quiet --objects --missing=print \
 141                  master..origin/master >revs &&
 142         awk -f print_1.awk revs |
 143         sed "s/?//" |
 144         sort >observed.oids &&
 145
 146         test_line_count = 6 observed.oids &&
 147         git -C pc1 fetch-pack --stdin "file://$(pwd)/srv.bare" <observed.oids &&
 148
 149         git -C pc1 rev-list --quiet --objects --missing=print \
 150                 master..origin/master >revs &&
 151         awk -f print_1.awk revs |
 152         sed "s/?//" |
 153         sort >observed.oids &&
 154
 155         test_line_count = 0 observed.oids
 156 '
 157
 158 test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack --fsck-objects' '
 159         git init src &&
 160         test_commit -C src x &&
 161         test_config -C src uploadpack.allowfilter 1 &&
 162         test_config -C src uploadpack.allowanysha1inwant 1 &&
 163
 164         GIT_TRACE="$(pwd)/trace" git -c transfer.fsckobjects=1 \
 165                 clone --filter="blob:none" "file://$(pwd)/src" dst &&
 166         grep "git index-pack.*--fsck-objects" trace
 167 '
 168
 169 test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' '
 170         rm -rf src dst &&
 171         git init src &&
 172         test_commit -C src x &&
 173         test_config -C src uploadpack.allowfilter 1 &&
 174         test_config -C src uploadpack.allowanysha1inwant 1 &&
 175
 176         # Create a tag pointing to a blob.
 177         BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) &&
 178         git -C src tag myblob "$BLOB" &&
 179
 180         git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err &&
 181         ! grep "does not point to a valid object" err &&
 182         git -C dst fsck
 183 '
 184
 185 test_expect_success 'fetch what is specified on CLI even if already promised' '
 186         rm -rf src dst.git &&
 187         git init src &&
 188         test_commit -C src foo &&
 189         test_config -C src uploadpack.allowfilter 1 &&
 190         test_config -C src uploadpack.allowanysha1inwant 1 &&
 191
 192         git hash-object --stdin <src/foo.t >blob &&
 193
 194         git clone --bare --filter=blob:none "file://$(pwd)/src" dst.git &&
 195         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_before &&
 196         grep "?$(cat blob)" missing_before &&
 197         git -C dst.git fetch origin $(cat blob) &&
 198         git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_after &&
 199         ! grep "?$(cat blob)" missing_after
 200 '
 201
 202 . "$TEST_DIRECTORY"/lib-httpd.sh
 203 start_httpd
 204
 205 # Converts bytes into a form suitable for inclusion in a sed command. For
 206 # example, "printf 'ab\r\n' | hex_unpack" results in '\x61\x62\x0d\x0a'.
 207 sed_escape () {
 208         perl -e '$/ = undef; $input = <>; print unpack("H2" x length($input), $input)' |
 209                 sed 's/\(..\)/\\x\1/g'
 210 }
 211
 212 test_expect_success 'upon cloning, check that all refs point to objects' '
 213         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 214         rm -rf "$SERVER" repo &&
 215         test_create_repo "$SERVER" &&
 216         test_commit -C "$SERVER" foo &&
 217         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 218         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 219
 220         # Create a tag pointing to a blob.
 221         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 222         git -C "$SERVER" tag myblob "$BLOB" &&
 223
 224         # Craft a packfile not including that blob.
 225         git -C "$SERVER" rev-parse HEAD |
 226         git -C "$SERVER" pack-objects --stdout >incomplete.pack &&
 227
 228         # Replace the existing packfile with the crafted one. The protocol
 229         # requires that the packfile be sent in sideband 1, hence the extra
 230         # \x01 byte at the beginning.
 231         printf "1,/packfile/!c %04x\\\\x01%s0000" \
 232                 "$(($(wc -c <incomplete.pack) + 5))" \
 233                 "$(sed_escape <incomplete.pack)" \
 234                 >"$HTTPD_ROOT_PATH/one-time-sed" &&
 235
 236         # Use protocol v2 because the sed command looks for the "packfile"
 237         # section header.
 238         test_config -C "$SERVER" protocol.version 2 &&
 239         test_must_fail git -c protocol.version=2 clone \
 240                 --filter=blob:none $HTTPD_URL/one_time_sed/server repo 2>err &&
 241
 242         grep "did not send all necessary objects" err &&
 243
 244         # Ensure that the one-time-sed script was used.
 245         ! test -e "$HTTPD_ROOT_PATH/one-time-sed"
 246 '
 247
 248 test_expect_success 'when partial cloning, tolerate server not sending target of tag' '
 249         SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 250         rm -rf "$SERVER" repo &&
 251         test_create_repo "$SERVER" &&
 252         test_commit -C "$SERVER" foo &&
 253         test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 254         test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 &&
 255
 256         # Create an annotated tag pointing to a blob.
 257         BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) &&
 258         git -C "$SERVER" tag -m message -a myblob "$BLOB" &&
 259
 260         # Craft a packfile including the tag, but not the blob it points to.
 261         # Also, omit objects referenced from HEAD in order to force a second
 262         # fetch (to fetch missing objects) upon the automatic checkout that
 263         # happens after a clone.
 264         printf "%s\n%s\n--not\n%s\n%s\n" \
 265                 $(git -C "$SERVER" rev-parse HEAD) \
 266                 $(git -C "$SERVER" rev-parse myblob) \
 267                 $(git -C "$SERVER" rev-parse HEAD^{tree}) \
 268                 $(git -C "$SERVER" rev-parse myblob^{blob}) |
 269                 git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack &&
 270
 271         # Replace the existing packfile with the crafted one. The protocol
 272         # requires that the packfile be sent in sideband 1, hence the extra
 273         # \x01 byte at the beginning.
 274         printf "1,/packfile/!c %04x\\\\x01%s0000" \
 275                 "$(($(wc -c <incomplete.pack) + 5))" \
 276                 "$(sed_escape <incomplete.pack)" \
 277                 >"$HTTPD_ROOT_PATH/one-time-sed" &&
 278
 279         # Use protocol v2 because the sed command looks for the "packfile"
 280         # section header.
 281         test_config -C "$SERVER" protocol.version 2 &&
 282
 283         # Exercise to make sure it works.
 284         git -c protocol.version=2 clone \
 285                 --filter=blob:none $HTTPD_URL/one_time_sed/server repo 2> err &&
 286         ! grep "missing object referenced by" err &&
 287
 288         # Ensure that the one-time-sed script was used.
 289         ! test -e "$HTTPD_ROOT_PATH/one-time-sed"
 290 '
 291
 292 stop_httpd
 293
 294 test_done