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-rwxr-xr-xt/t4067-diff-partial-clone.sh184
1 files changed, 184 insertions, 0 deletions
diff --git a/t/t4067-diff-partial-clone.sh b/t/t4067-diff-partial-clone.sh
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+++ b/t/t4067-diff-partial-clone.sh
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+#!/bin/sh
+
+test_description='behavior of diff when reading objects in a partial clone'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+test_expect_success 'git show batches blobs' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ echo b >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ # Ensure that there is exactly 1 negotiation by checking that there is
+ # only 1 "done" line sent. ("done" marks the end of negotiation.)
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client show HEAD &&
+ grep "fetch> done" trace >done_lines &&
+ test_line_count = 1 done_lines
+'
+
+test_expect_success 'diff batches blobs' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ echo b >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+ echo c >server/c &&
+ echo d >server/d &&
+ git -C server add c d &&
+ git -C server commit -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ # Ensure that there is exactly 1 negotiation by checking that there is
+ # only 1 "done" line sent. ("done" marks the end of negotiation.)
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
+ grep "fetch> done" trace >done_lines &&
+ test_line_count = 1 done_lines
+'
+
+test_expect_success 'diff skips same-OID blobs' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ echo b >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+ echo another-a >server/a &&
+ git -C server add a &&
+ git -C server commit -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ echo a | git hash-object --stdin >hash-old-a &&
+ echo another-a | git hash-object --stdin >hash-new-a &&
+ echo b | git hash-object --stdin >hash-b &&
+
+ # Ensure that only a and another-a are fetched.
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
+ grep "want $(cat hash-old-a)" trace &&
+ grep "want $(cat hash-new-a)" trace &&
+ ! grep "want $(cat hash-b)" trace
+'
+
+test_expect_success 'when fetching missing objects, diff skips GITLINKs' '
+ test_when_finished "rm -rf sub server client trace" &&
+ test_config_global protocol.file.allow always &&
+
+ test_create_repo sub &&
+ test_commit -C sub first &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ git -C server add a &&
+ git -C server submodule add "file://$(pwd)/sub" &&
+ git -C server commit -m x &&
+
+ test_commit -C server/sub second &&
+ echo another-a >server/a &&
+ git -C server add a sub &&
+ git -C server commit -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ echo a | git hash-object --stdin >hash-old-a &&
+ echo another-a | git hash-object --stdin >hash-new-a &&
+
+ # Ensure that a and another-a are fetched, and check (by successful
+ # execution of the diff) that no invalid OIDs are sent.
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff HEAD^ HEAD &&
+ grep "want $(cat hash-old-a)" trace &&
+ grep "want $(cat hash-new-a)" trace
+'
+
+test_expect_success 'diff with rename detection batches blobs' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ printf "b\nb\nb\nb\nb\n" >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+ rm server/b &&
+ printf "b\nb\nb\nb\nbX\n" >server/c &&
+ git -C server add c &&
+ git -C server commit -a -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ # Ensure that there is exactly 1 negotiation by checking that there is
+ # only 1 "done" line sent. ("done" marks the end of negotiation.)
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD >out &&
+ grep ":100644 100644.*R[0-9][0-9][0-9].*b.*c" out &&
+ grep "fetch> done" trace >done_lines &&
+ test_line_count = 1 done_lines
+'
+
+test_expect_success 'diff does not fetch anything if inexact rename detection is not needed' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ printf "b\nb\nb\nb\nb\n" >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+ mv server/b server/c &&
+ git -C server add c &&
+ git -C server commit -a -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ # Ensure no fetches.
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD &&
+ test_path_is_missing trace
+'
+
+test_expect_success 'diff --break-rewrites fetches only if necessary, and batches blobs if it does' '
+ test_when_finished "rm -rf server client trace" &&
+
+ test_create_repo server &&
+ echo a >server/a &&
+ printf "b\nb\nb\nb\nb\n" >server/b &&
+ git -C server add a b &&
+ git -C server commit -m x &&
+ printf "c\nc\nc\nc\nc\n" >server/b &&
+ git -C server commit -a -m x &&
+
+ test_config -C server uploadpack.allowfilter 1 &&
+ test_config -C server uploadpack.allowanysha1inwant 1 &&
+ git clone --bare --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+ # Ensure no fetches.
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --raw -M HEAD^ HEAD &&
+ test_path_is_missing trace &&
+
+ # But with --break-rewrites, ensure that there is exactly 1 negotiation
+ # by checking that there is only 1 "done" line sent. ("done" marks the
+ # end of negotiation.)
+ GIT_TRACE_PACKET="$(pwd)/trace" git -C client diff --break-rewrites --raw -M HEAD^ HEAD &&
+ grep "fetch> done" trace >done_lines &&
+ test_line_count = 1 done_lines
+'
+
+test_done