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