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293194c9f9
95acf11a3d ("diff: restrict when prefetching occurs", 2020-04-07) taught
diff to prefetch blobs in a more limited set of situations. These
limited situations include when the output format requires blob data,
and when inexact rename detection is needed.
There is an existing test case that tests inexact rename detection, but
it also uses an output format that requires blob data, resulting in the
inexact-rename-detection-only code not being tested. Update this test to
use the raw output format, which does not require blob data.
Thanks to Derrick Stolee for noticing this lapse in code coverage and
for doing the preliminary analysis [1].
[1] https://lore.kernel.org/git/853759d3-97c3-241f-98e1-990883cd204e@gmail.com/
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
182 lines
6 KiB
Bash
Executable file
182 lines
6 KiB
Bash
Executable file
#!/bin/sh
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test_description='behavior of diff when reading objects in a partial clone'
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. ./test-lib.sh
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test_expect_success 'git show batches blobs' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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echo b >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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# Ensure that there is exactly 1 negotiation by checking that there is
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# only 1 "done" line sent. ("done" marks the end of negotiation.)
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client show HEAD &&
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grep "git> done" trace >done_lines &&
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test_line_count = 1 done_lines
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'
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test_expect_success 'diff batches blobs' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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echo b >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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echo c >server/c &&
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echo d >server/d &&
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git -C server add c d &&
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git -C server commit -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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# Ensure that there is exactly 1 negotiation by checking that there is
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# only 1 "done" line sent. ("done" marks the end of negotiation.)
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
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grep "git> done" trace >done_lines &&
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test_line_count = 1 done_lines
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'
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test_expect_success 'diff skips same-OID blobs' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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echo b >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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echo another-a >server/a &&
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git -C server add a &&
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git -C server commit -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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echo a | git hash-object --stdin >hash-old-a &&
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echo another-a | git hash-object --stdin >hash-new-a &&
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echo b | git hash-object --stdin >hash-b &&
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# Ensure that only a and another-a are fetched.
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
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grep "want $(cat hash-old-a)" trace &&
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grep "want $(cat hash-new-a)" trace &&
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! grep "want $(cat hash-b)" trace
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'
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test_expect_success 'when fetching missing objects, diff skips GITLINKs' '
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test_when_finished "rm -rf sub server client trace" &&
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test_create_repo sub &&
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test_commit -C sub first &&
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test_create_repo server &&
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echo a >server/a &&
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git -C server add a &&
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git -C server submodule add "file://$(pwd)/sub" &&
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git -C server commit -m x &&
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test_commit -C server/sub second &&
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echo another-a >server/a &&
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git -C server add a sub &&
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git -C server commit -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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echo a | git hash-object --stdin >hash-old-a &&
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echo another-a | git hash-object --stdin >hash-new-a &&
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# Ensure that a and another-a are fetched, and check (by successful
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# execution of the diff) that no invalid OIDs are sent.
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
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grep "want $(cat hash-old-a)" trace &&
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grep "want $(cat hash-new-a)" trace
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'
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test_expect_success 'diff with rename detection batches blobs' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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printf "b\nb\nb\nb\nb\n" >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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rm server/b &&
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printf "b\nb\nb\nb\nbX\n" >server/c &&
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git -C server add c &&
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git -C server commit -a -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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# Ensure that there is exactly 1 negotiation by checking that there is
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# only 1 "done" line sent. ("done" marks the end of negotiation.)
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD >out &&
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grep ":100644 100644.*R[0-9][0-9][0-9].*b.*c" out &&
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grep "git> done" trace >done_lines &&
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test_line_count = 1 done_lines
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'
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test_expect_success 'diff does not fetch anything if inexact rename detection is not needed' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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printf "b\nb\nb\nb\nb\n" >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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mv server/b server/c &&
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git -C server add c &&
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git -C server commit -a -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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# Ensure no fetches.
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD &&
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! test_path_exists trace
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'
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test_expect_success 'diff --break-rewrites fetches only if necessary, and batches blobs if it does' '
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test_when_finished "rm -rf server client trace" &&
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test_create_repo server &&
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echo a >server/a &&
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printf "b\nb\nb\nb\nb\n" >server/b &&
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git -C server add a b &&
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git -C server commit -m x &&
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printf "c\nc\nc\nc\nc\n" >server/b &&
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git -C server commit -a -m x &&
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test_config -C server uploadpack.allowfilter 1 &&
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test_config -C server uploadpack.allowanysha1inwant 1 &&
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git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
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# Ensure no fetches.
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD &&
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! test_path_exists trace &&
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# But with --break-rewrites, ensure that there is exactly 1 negotiation
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# by checking that there is only 1 "done" line sent. ("done" marks the
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# end of negotiation.)
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GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --break-rewrites --raw -M HEAD^ HEAD &&
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grep "git> done" trace >done_lines &&
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test_line_count = 1 done_lines
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'
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test_done
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