Teach clone to send a list of ref-prefixes, when using protocol v2, to
allow the server to filter out irrelevant references from the
ref-advertisement. This reduces wasted time and bandwidth when cloning
repositories with a larger number of references.
Signed-off-by: Brandon Williams <bmwill@xxxxxxxxxx>
---
builtin/clone.c | 20 +++++++++++++++-----
t/t5702-protocol-v2.sh | 7 ++++++-
2 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/builtin/clone.c b/builtin/clone.c
index 99e73dae85..5c0adbd6d0 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -895,7 +895,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
int err = 0, complete_refs_before_fetch = 1;
int submodule_progress;
- struct refspec_item refspec;
+ struct refspec rs = REFSPEC_INIT_FETCH;
+ struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
fetch_if_missing = 0;
@@ -1077,7 +1078,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
if (option_required_reference.nr || option_optional_reference.nr)
setup_reference();
- refspec_item_init(&refspec, value.buf, REFSPEC_FETCH);
+ refspec_append(&rs, value.buf);
strbuf_reset(&value);
@@ -1134,10 +1135,18 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
if (transport->smart_options && !deepen && !filter_options.choice)
transport->smart_options->check_self_contained_and_connected = 1;
- refs = transport_get_remote_refs(transport, NULL);
+
+ argv_array_push(&ref_prefixes, "HEAD");
+ refspec_ref_prefixes(&rs, &ref_prefixes);
+ if (option_branch)
+ expand_ref_prefix(&ref_prefixes, option_branch);
+ if (!option_no_tags)
+ argv_array_push(&ref_prefixes, "refs/tags/");
+
+ refs = transport_get_remote_refs(transport, &ref_prefixes);
if (refs) {
- mapped_refs = wanted_peer_refs(refs, &refspec);
+ mapped_refs = wanted_peer_refs(refs, &rs.items[0]);
/*
* transport_get_remote_refs() may return refs with null sha-1
* in mapped_refs (see struct transport->get_refs_list
@@ -1231,6 +1240,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
strbuf_release(&value);
junk_mode = JUNK_LEAVE_ALL;
- refspec_item_clear(&refspec);
+ refspec_clear(&rs);
+ argv_array_clear(&ref_prefixes);
return err;
}
diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh
index a4fe6508bd..9c6ea04a69 100755
--- a/t/t5702-protocol-v2.sh
+++ b/t/t5702-protocol-v2.sh
@@ -181,7 +181,12 @@ test_expect_success 'clone with file:// using protocol v2' '
test_cmp expect actual &&
# Server responded using protocol v2
- grep "clone< version 2" log
+ grep "clone< version 2" log &&
+
+ # Client sent ref-prefixes to filter the ref-advertisement
+ grep "ref-prefix HEAD" log &&
+ grep "ref-prefix refs/heads/" log &&
+ grep "ref-prefix refs/tags/" log
'
test_expect_success 'fetch with file:// using protocol v2' '
--
2.18.0.233.g985f88cf7e-goog
