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Diffstat (limited to 't/t5616-partial-clone.sh')
| -rwxr-xr-x | t/t5616-partial-clone.sh | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh new file mode 100755 index 000000000000..b91ef548f86b --- /dev/null +++ b/t/t5616-partial-clone.sh @@ -0,0 +1,420 @@ +#!/bin/sh + +test_description='git partial clone' + +. ./test-lib.sh + +# create a normal "src" repo where we can later create new commits. +# expect_1.oids will contain a list of the OIDs of all blobs. +test_expect_success 'setup normal src repo' ' + echo "{print \$1}" >print_1.awk && + echo "{print \$2}" >print_2.awk && + + git init src && + for n in 1 2 3 4 + do + echo "This is file: $n" > src/file.$n.txt + git -C src add file.$n.txt + git -C src commit -m "file $n" + git -C src ls-files -s file.$n.txt >>temp + done && + awk -f print_2.awk <temp | sort >expect_1.oids && + test_line_count = 4 expect_1.oids +' + +# bare clone "src" giving "srv.bare" for use as our server. +test_expect_success 'setup bare clone for server' ' + git clone --bare "file://$(pwd)/src" srv.bare && + git -C srv.bare config --local uploadpack.allowfilter 1 && + git -C srv.bare config --local uploadpack.allowanysha1inwant 1 +' + +# do basic partial clone from "srv.bare" +# confirm we are missing all of the known blobs. +# confirm partial clone was registered in the local config. +test_expect_success 'do partial clone 1' ' + git clone --no-checkout --filter=blob:none "file://$(pwd)/srv.bare" pc1 && + + git -C pc1 rev-list --quiet --objects --missing=print HEAD >revs && + awk -f print_1.awk revs | + sed "s/?//" | + sort >observed.oids && + + test_cmp expect_1.oids observed.oids && + test "$(git -C pc1 config --local core.repositoryformatversion)" = "1" && + test "$(git -C pc1 config --local extensions.partialclone)" = "origin" && + test "$(git -C pc1 config --local core.partialclonefilter)" = "blob:none" +' + +# checkout master to force dynamic object fetch of blobs at HEAD. +test_expect_success 'verify checkout with dynamic object fetch' ' + git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed && + test_line_count = 4 observed && + git -C pc1 checkout master && + git -C pc1 rev-list --quiet --objects --missing=print HEAD >observed && + test_line_count = 0 observed +' + +# create new commits in "src" repo to establish a blame history on file.1.txt +# and push to "srv.bare". +test_expect_success 'push new commits to server' ' + git -C src remote add srv "file://$(pwd)/srv.bare" && + for x in a b c d e + do + echo "Mod file.1.txt $x" >>src/file.1.txt + git -C src add file.1.txt + git -C src commit -m "mod $x" + done && + git -C src blame master -- file.1.txt >expect.blame && + git -C src push -u srv master +' + +# (partial) fetch in the partial clone repo from the promisor remote. +# verify that fetch inherited the filter-spec from the config and DOES NOT +# have the new blobs. +test_expect_success 'partial fetch inherits filter settings' ' + git -C pc1 fetch origin && + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >observed && + test_line_count = 5 observed +' + +# force dynamic object fetch using diff. +# we should only get 1 new blob (for the file in origin/master). +test_expect_success 'verify diff causes dynamic object fetch' ' + git -C pc1 diff master..origin/master -- file.1.txt && + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >observed && + test_line_count = 4 observed +' + +# force full dynamic object fetch of the file's history using blame. +# we should get the intermediate blobs for the file. +test_expect_success 'verify blame causes dynamic object fetch' ' + git -C pc1 blame origin/master -- file.1.txt >observed.blame && + test_cmp expect.blame observed.blame && + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >observed && + test_line_count = 0 observed +' + +# create new commits in "src" repo to establish a history on file.2.txt +# and push to "srv.bare". +test_expect_success 'push new commits to server for file.2.txt' ' + for x in a b c d e f + do + echo "Mod file.2.txt $x" >>src/file.2.txt + git -C src add file.2.txt + git -C src commit -m "mod $x" + done && + git -C src push -u srv master +' + +# Do FULL fetch by disabling inherited filter-spec using --no-filter. +# Verify we have all the new blobs. +test_expect_success 'override inherited filter-spec using --no-filter' ' + git -C pc1 fetch --no-filter origin && + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >observed && + test_line_count = 0 observed +' + +# create new commits in "src" repo to establish a history on file.3.txt +# and push to "srv.bare". +test_expect_success 'push new commits to server for file.3.txt' ' + for x in a b c d e f + do + echo "Mod file.3.txt $x" >>src/file.3.txt + git -C src add file.3.txt + git -C src commit -m "mod $x" + done && + git -C src push -u srv master +' + +# Do a partial fetch and then try to manually fetch the missing objects. +# This can be used as the basis of a pre-command hook to bulk fetch objects +# perhaps combined with a command in dry-run mode. +test_expect_success 'manual prefetch of missing objects' ' + git -C pc1 fetch --filter=blob:none origin && + + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >revs && + awk -f print_1.awk revs | + sed "s/?//" | + sort >observed.oids && + + test_line_count = 6 observed.oids && + git -C pc1 fetch-pack --stdin "file://$(pwd)/srv.bare" <observed.oids && + + git -C pc1 rev-list --quiet --objects --missing=print \ + master..origin/master >revs && + awk -f print_1.awk revs | + sed "s/?//" | + sort >observed.oids && + + test_line_count = 0 observed.oids +' + +test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack --fsck-objects' ' + git init src && + test_commit -C src x && + test_config -C src uploadpack.allowfilter 1 && + test_config -C src uploadpack.allowanysha1inwant 1 && + + GIT_TRACE="$(pwd)/trace" git -c transfer.fsckobjects=1 \ + clone --filter="blob:none" "file://$(pwd)/src" dst && + grep "git index-pack.*--fsck-objects" trace +' + +test_expect_success 'use fsck before and after manually fetching a missing subtree' ' + # push new commit so server has a subtree + mkdir src/dir && + echo "in dir" >src/dir/file.txt && + git -C src add dir/file.txt && + git -C src commit -m "file in dir" && + git -C src push -u srv master && + SUBTREE=$(git -C src rev-parse HEAD:dir) && + + rm -rf dst && + git clone --no-checkout --filter=tree:0 "file://$(pwd)/srv.bare" dst && + git -C dst fsck && + + # Make sure we only have commits, and all trees and blobs are missing. + git -C dst rev-list --missing=allow-any --objects master \ + >fetched_objects && + awk -f print_1.awk fetched_objects | + xargs -n1 git -C dst cat-file -t >fetched_types && + + sort -u fetched_types >unique_types.observed && + echo commit >unique_types.expected && + test_cmp unique_types.expected unique_types.observed && + + # Auto-fetch a tree with cat-file. + git -C dst cat-file -p $SUBTREE >tree_contents && + grep file.txt tree_contents && + + # fsck still works after an auto-fetch of a tree. + git -C dst fsck && + + # Auto-fetch all remaining trees and blobs with --missing=error + git -C dst rev-list --missing=error --objects master >fetched_objects && + test_line_count = 70 fetched_objects && + + awk -f print_1.awk fetched_objects | + xargs -n1 git -C dst cat-file -t >fetched_types && + + sort -u fetched_types >unique_types.observed && + test_write_lines blob commit tree >unique_types.expected && + test_cmp unique_types.expected unique_types.observed +' + +test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' ' + rm -rf src dst && + git init src && + test_commit -C src x && + test_config -C src uploadpack.allowfilter 1 && + test_config -C src uploadpack.allowanysha1inwant 1 && + + # Create a tag pointing to a blob. + BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) && + git -C src tag myblob "$BLOB" && + + git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err && + ! grep "does not point to a valid object" err && + git -C dst fsck +' + +test_expect_success 'fetch what is specified on CLI even if already promised' ' + rm -rf src dst.git && + git init src && + test_commit -C src foo && + test_config -C src uploadpack.allowfilter 1 && + test_config -C src uploadpack.allowanysha1inwant 1 && + + git hash-object --stdin <src/foo.t >blob && + + git clone --bare --filter=blob:none "file://$(pwd)/src" dst.git && + git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_before && + grep "?$(cat blob)" missing_before && + git -C dst.git fetch origin $(cat blob) && + git -C dst.git rev-list --objects --quiet --missing=print HEAD >missing_after && + ! grep "?$(cat blob)" missing_after +' + +. "$TEST_DIRECTORY"/lib-httpd.sh +start_httpd + +# Converts bytes into their hexadecimal representation. For example, +# "printf 'ab\r\n' | hex_unpack" results in '61620d0a'. +hex_unpack () { + perl -e '$/ = undef; $input = <>; print unpack("H2" x length($input), $input)' +} + +# Inserts $1 at the start of the string and every 2 characters thereafter. +intersperse () { + sed 's/\(..\)/'$1'\1/g' +} + +# Create a one-time-sed command to replace the existing packfile with $1. +replace_packfile () { + # The protocol requires that the packfile be sent in sideband 1, hence + # the extra \x01 byte at the beginning. + printf "1,/packfile/!c %04x\\\\x01%s0000" \ + "$(($(wc -c <$1) + 5))" \ + "$(hex_unpack <$1 | intersperse '\\x')" \ + >"$HTTPD_ROOT_PATH/one-time-sed" +} + +test_expect_success 'upon cloning, check that all refs point to objects' ' + SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" && + rm -rf "$SERVER" repo && + test_create_repo "$SERVER" && + test_commit -C "$SERVER" foo && + test_config -C "$SERVER" uploadpack.allowfilter 1 && + test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 && + + # Create a tag pointing to a blob. + BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) && + git -C "$SERVER" tag myblob "$BLOB" && + + # Craft a packfile not including that blob. + git -C "$SERVER" rev-parse HEAD | + git -C "$SERVER" pack-objects --stdout >incomplete.pack && + + # Replace the existing packfile with the crafted one. The protocol + # requires that the packfile be sent in sideband 1, hence the extra + # \x01 byte at the beginning. + replace_packfile incomplete.pack && + + # Use protocol v2 because the sed command looks for the "packfile" + # section header. + test_config -C "$SERVER" protocol.version 2 && + test_must_fail git -c protocol.version=2 clone \ + --filter=blob:none $HTTPD_URL/one_time_sed/server repo 2>err && + + test_i18ngrep "did not send all necessary objects" err && + + # Ensure that the one-time-sed script was used. + ! test -e "$HTTPD_ROOT_PATH/one-time-sed" +' + +test_expect_success 'when partial cloning, tolerate server not sending target of tag' ' + SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" && + rm -rf "$SERVER" repo && + test_create_repo "$SERVER" && + test_commit -C "$SERVER" foo && + test_config -C "$SERVER" uploadpack.allowfilter 1 && + test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 && + + # Create an annotated tag pointing to a blob. + BLOB=$(echo blob-contents | git -C "$SERVER" hash-object --stdin -w) && + git -C "$SERVER" tag -m message -a myblob "$BLOB" && + + # Craft a packfile including the tag, but not the blob it points to. + # Also, omit objects referenced from HEAD in order to force a second + # fetch (to fetch missing objects) upon the automatic checkout that + # happens after a clone. + printf "%s\n%s\n--not\n%s\n%s\n" \ + $(git -C "$SERVER" rev-parse HEAD) \ + $(git -C "$SERVER" rev-parse myblob) \ + $(git -C "$SERVER" rev-parse HEAD^{tree}) \ + $(git -C "$SERVER" rev-parse myblob^{blob}) | + git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack && + + # Replace the existing packfile with the crafted one. The protocol + # requires that the packfile be sent in sideband 1, hence the extra + # \x01 byte at the beginning. + replace_packfile incomplete.pack && + + # Use protocol v2 because the sed command looks for the "packfile" + # section header. + test_config -C "$SERVER" protocol.version 2 && + + # Exercise to make sure it works. + git -c protocol.version=2 clone \ + --filter=blob:none $HTTPD_URL/one_time_sed/server repo 2> err && + ! grep "missing object referenced by" err && + + # Ensure that the one-time-sed script was used. + ! test -e "$HTTPD_ROOT_PATH/one-time-sed" +' + +test_expect_success 'tolerate server sending REF_DELTA against missing promisor objects' ' + SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" && + rm -rf "$SERVER" repo && + test_create_repo "$SERVER" && + test_config -C "$SERVER" uploadpack.allowfilter 1 && + test_config -C "$SERVER" uploadpack.allowanysha1inwant 1 && + + # Create a commit with 2 blobs to be used as delta bases. + for i in $(test_seq 10) + do + echo "this is a line" >>"$SERVER/foo.txt" && + echo "this is another line" >>"$SERVER/have.txt" + done && + git -C "$SERVER" add foo.txt have.txt && + git -C "$SERVER" commit -m bar && + git -C "$SERVER" rev-parse HEAD:foo.txt >deltabase_missing && + git -C "$SERVER" rev-parse HEAD:have.txt >deltabase_have && + + # Clone. The client has deltabase_have but not deltabase_missing. + git -c protocol.version=2 clone --no-checkout \ + --filter=blob:none $HTTPD_URL/one_time_sed/server repo && + git -C repo hash-object -w -- "$SERVER/have.txt" && + + # Sanity check to ensure that the client does not have + # deltabase_missing. + git -C repo rev-list --objects --ignore-missing \ + -- $(cat deltabase_missing) >objlist && + test_line_count = 0 objlist && + + # Another commit. This commit will be fetched by the client. + echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/foo.txt" && + echo "abcdefghijklmnopqrstuvwxyz" >>"$SERVER/have.txt" && + git -C "$SERVER" add foo.txt have.txt && + git -C "$SERVER" commit -m baz && + + # Pack a thin pack containing, among other things, HEAD:foo.txt + # delta-ed against HEAD^:foo.txt and HEAD:have.txt delta-ed against + # HEAD^:have.txt. + printf "%s\n--not\n%s\n" \ + $(git -C "$SERVER" rev-parse HEAD) \ + $(git -C "$SERVER" rev-parse HEAD^) | + git -C "$SERVER" pack-objects --thin --stdout >thin.pack && + + # Ensure that the pack contains one delta against HEAD^:foo.txt. Since + # the delta contains at least 26 novel characters, the size cannot be + # contained in 4 bits, so the object header will take up 2 bytes. The + # most significant nybble of the first byte is 0b1111 (0b1 to indicate + # that the header continues, and 0b111 to indicate REF_DELTA), followed + # by any 3 nybbles, then the OID of the delta base. + printf "f.,..%s" $(intersperse "," <deltabase_missing) >want && + hex_unpack <thin.pack | intersperse "," >have && + grep $(cat want) have && + + # Ensure that the pack contains one delta against HEAD^:have.txt, + # similar to the above. + printf "f.,..%s" $(intersperse "," <deltabase_have) >want && + hex_unpack <thin.pack | intersperse "," >have && + grep $(cat want) have && + + replace_packfile thin.pack && + + # Use protocol v2 because the sed command looks for the "packfile" + # section header. + test_config -C "$SERVER" protocol.version 2 && + + # Fetch the thin pack and ensure that index-pack is able to handle the + # REF_DELTA object with a missing promisor delta base. + GIT_TRACE_PACKET="$(pwd)/trace" git -C repo -c protocol.version=2 fetch && + + # Ensure that the missing delta base was directly fetched, but not the + # one that the client has. + grep "want $(cat deltabase_missing)" trace && + ! grep "want $(cat deltabase_have)" trace && + + # Ensure that the one-time-sed script was used. + ! test -e "$HTTPD_ROOT_PATH/one-time-sed" +' + +test_done |