Construct an argv_array of the ref patterns supplied via the command
line and pass them to 'transport_get_remote_refs()' to be used when
communicating protocol v2 so that the server can limit the ref
advertisement based on the supplied patterns.

Signed-off-by: Brandon Williams <bmw...@google.com>
---
 builtin/ls-remote.c    |  7 +++++--
 t/t5702-protocol-v2.sh | 16 ++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/builtin/ls-remote.c b/builtin/ls-remote.c
index c6e9847c5..caf1051f3 100644
--- a/builtin/ls-remote.c
+++ b/builtin/ls-remote.c
@@ -43,6 +43,7 @@ int cmd_ls_remote(int argc, const char **argv, const char 
*prefix)
        int show_symref_target = 0;
        const char *uploadpack = NULL;
        const char **pattern = NULL;
+       struct argv_array ref_patterns = ARGV_ARRAY_INIT;
 
        struct remote *remote;
        struct transport *transport;
@@ -74,8 +75,10 @@ int cmd_ls_remote(int argc, const char **argv, const char 
*prefix)
        if (argc > 1) {
                int i;
                pattern = xcalloc(argc, sizeof(const char *));
-               for (i = 1; i < argc; i++)
+               for (i = 1; i < argc; i++) {
                        pattern[i - 1] = xstrfmt("*/%s", argv[i]);
+                       argv_array_push(&ref_patterns, argv[i]);
+               }
        }
 
        remote = remote_get(dest);
@@ -96,7 +99,7 @@ int cmd_ls_remote(int argc, const char **argv, const char 
*prefix)
        if (uploadpack != NULL)
                transport_set_option(transport, TRANS_OPT_UPLOADPACK, 
uploadpack);
 
-       ref = transport_get_remote_refs(transport, NULL);
+       ref = transport_get_remote_refs(transport, &ref_patterns);
        if (transport_disconnect(transport))
                return 1;
 
diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh
index 1e42b5588..a33ff6597 100755
--- a/t/t5702-protocol-v2.sh
+++ b/t/t5702-protocol-v2.sh
@@ -30,6 +30,14 @@ test_expect_success 'list refs with git:// using protocol 
v2' '
        test_cmp actual expect
 '
 
+test_expect_success 'ref advertisment is filtered with ls-remote using 
protocol v2' '
+       GIT_TRACE_PACKET=1 git -c protocol.version=2 \
+               ls-remote "$GIT_DAEMON_URL/parent" master 2>log &&
+
+       grep "ref-pattern master" log &&
+       ! grep "refs/tags/" log
+'
+
 stop_git_daemon
 
 # Test protocol v2 with 'file://' transport
@@ -50,4 +58,12 @@ test_expect_success 'list refs with file:// using protocol 
v2' '
        test_cmp actual expect
 '
 
+test_expect_success 'ref advertisment is filtered with ls-remote using 
protocol v2' '
+       GIT_TRACE_PACKET=1 git -c protocol.version=2 \
+               ls-remote "file://$(pwd)/file_parent" master 2>log &&
+
+       grep "ref-pattern master" log &&
+       ! grep "refs/tags/" log
+'
+
 test_done
-- 
2.16.0.rc1.238.g530d649a79-goog

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