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-rwxr-xr-xt/t5616-partial-clone.sh70
1 files changed, 70 insertions, 0 deletions
diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh
index 79f7b65..171011d 100755
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -296,6 +296,76 @@ test_expect_success 'partial clone with unresolvable sparse filter fails cleanly
test_i18ngrep "unable to parse sparse filter data in" err
'
+setup_triangle () {
+ rm -rf big-blob.txt server client promisor-remote &&
+
+ printf "line %d\n" $(test_seq 1 100) >big-blob.txt &&
+
+ # Create a server with 2 commits: a commit with a big blob and a child
+ # commit with an incremental change. Also, create a partial clone
+ # client that only contains the first commit.
+ git init server &&
+ git -C server config --local uploadpack.allowfilter 1 &&
+ cp big-blob.txt server &&
+ git -C server add big-blob.txt &&
+ git -C server commit -m "initial" &&
+ git clone --bare --filter=tree:0 "file://$(pwd)/server" client &&
+ echo another line >>server/big-blob.txt &&
+ git -C server commit -am "append line to big blob" &&
+
+ # Create a promisor remote that only contains the blob from the first
+ # commit, and set it as the promisor remote of client. Thus, whenever
+ # the client lazy fetches, the lazy fetch will succeed only if it is
+ # for this blob.
+ git init promisor-remote &&
+ test_commit -C promisor-remote one && # so that ref advertisement is not empty
+ git -C promisor-remote config --local uploadpack.allowanysha1inwant 1 &&
+ git -C promisor-remote hash-object -w --stdin <big-blob.txt &&
+ git -C client remote set-url origin "file://$(pwd)/promisor-remote"
+}
+
+# NEEDSWORK: The tests beginning with "fetch lazy-fetches" below only
+# test that "fetch" avoid fetching trees and blobs, but not commits or
+# tags. Revisit this if Git is ever taught to support partial clones
+# with commits and/or tags filtered out.
+
+test_expect_success 'fetch lazy-fetches only to resolve deltas' '
+ setup_triangle &&
+
+ # Exercise to make sure it works. Git will not fetch anything from the
+ # promisor remote other than for the big blob (because it needs to
+ # resolve the delta).
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
+ fetch "file://$(pwd)/server" master &&
+
+ # Verify the assumption that the client needed to fetch the delta base
+ # to resolve the delta.
+ git hash-object big-blob.txt >hash &&
+ grep "want $(cat hash)" trace
+'
+
+test_expect_success 'fetch lazy-fetches only to resolve deltas, protocol v2' '
+ setup_triangle &&
+
+ git -C server config --local protocol.version 2 &&
+ git -C client config --local protocol.version 2 &&
+ git -C promisor-remote config --local protocol.version 2 &&
+
+ # Exercise to make sure it works. Git will not fetch anything from the
+ # promisor remote other than for the big blob (because it needs to
+ # resolve the delta).
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client \
+ fetch "file://$(pwd)/server" master &&
+
+ # Verify that protocol version 2 was used.
+ grep "fetch< version 2" trace &&
+
+ # Verify the assumption that the client needed to fetch the delta base
+ # to resolve the delta.
+ git hash-object big-blob.txt >hash &&
+ grep "want $(cat hash)" trace
+'
+
. "$TEST_DIRECTORY"/lib-httpd.sh
start_httpd