fetch-pack, index-pack, transport: partial clone

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fetch-pack.c

@@ -153,6 +153,10 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 			args.no_dependents = 1;
 			continue;
 		}
+		if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
+			parse_list_objects_filter(&args.filter_options, arg);
+			continue;
+		}
 		usage(fetch_pack_usage);
 	}
 	if (deepen_not.nr)

fetch-pack.c

@@ -29,6 +29,7 @@ static int deepen_not_ok;
 static int fetch_fsck_objects = -1;
 static int transfer_fsck_objects = -1;
 static int agent_supported;
+static int server_supports_filtering;
 static struct lock_file shallow_lock;
 static const char *alternate_shallow_file;
 
@@ -379,6 +380,8 @@ static int find_common(struct fetch_pack_args *args,
 			if (deepen_not_ok)      strbuf_addstr(&c, " deepen-not");
 			if (agent_supported)    strbuf_addf(&c, " agent=%s",
 							    git_user_agent_sanitized());
+			if (args->filter_options.choice)
+				strbuf_addstr(&c, " filter");
 			packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
 			strbuf_release(&c);
 		} else
@@ -407,6 +410,9 @@ static int find_common(struct fetch_pack_args *args,
 			packet_buf_write(&req_buf, "deepen-not %s", s->string);
 		}
 	}
+	if (server_supports_filtering && args->filter_options.choice)
+		packet_buf_write(&req_buf, "filter %s",
+				 args->filter_options.filter_spec);
 	packet_buf_flush(&req_buf);
 	state_len = req_buf.len;
 
@@ -969,6 +975,13 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 	else
 		prefer_ofs_delta = 0;
 
+	if (server_supports("filter")) {
+		server_supports_filtering = 1;
+		print_verbose(args, _("Server supports filter"));
+	} else if (args->filter_options.choice) {
+		warning("filtering not recognized by server, ignoring");
+	}
+
 	if ((agent_feature = server_feature_value("agent", &agent_len))) {
 		agent_supported = 1;
 		if (agent_len)

fetch-pack.h

@@ -3,6 +3,7 @@
 
 #include "string-list.h"
 #include "run-command.h"
+#include "list-objects-filter-options.h"
 
 struct oid_array;
 
@@ -12,6 +13,7 @@ struct fetch_pack_args {
 	int depth;
 	const char *deepen_since;
 	const struct string_list *deepen_not;
+	struct list_objects_filter_options filter_options;
 	unsigned deepen_relative:1;
 	unsigned quiet:1;
 	unsigned keep_pack:1;

transport-helper.c

@@ -671,6 +671,11 @@ static int fetch(struct transport *transport,
 	if (data->transport_options.update_shallow)
 		set_helper_option(transport, "update-shallow", "true");
 
+	if (data->transport_options.filter_options.choice)
+		set_helper_option(
+			transport, "filter",
+			data->transport_options.filter_options.filter_spec);
+
 	if (data->fetch)
 		return fetch_with_fetch(transport, nr_heads, to_fetch);
 

transport.c

@@ -166,6 +166,9 @@ static int set_git_option(struct git_transport_options *opts,
 	} else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
 		opts->no_dependents = !!value;
 		return 0;
+	} else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
+		parse_list_objects_filter(&opts->filter_options, value);
+		return 0;
 	}
 	return 1;
 }
@@ -236,6 +239,7 @@ static int fetch_refs_via_pack(struct transport *transport,
 	args.update_shallow = data->options.update_shallow;
 	args.from_promisor = data->options.from_promisor;
 	args.no_dependents = data->options.no_dependents;
+	args.filter_options = data->options.filter_options;
 
 	if (!data->got_remote_heads) {
 		connect_setup(transport, 0);

transport.h

@@ -4,6 +4,7 @@
 #include "cache.h"
 #include "run-command.h"
 #include "remote.h"
+#include "list-objects-filter-options.h"
 
 struct string_list;
 
@@ -23,6 +24,7 @@ struct git_transport_options {
 	const char *uploadpack;
 	const char *receivepack;
 	struct push_cas_option *cas;
+	struct list_objects_filter_options filter_options;
 };
 
 enum transport_family {
@@ -221,6 +223,9 @@ void transport_check_allowed(const char *type);
  */
 #define TRANS_OPT_NO_DEPENDENTS "no-dependents"
 
+/* Filter objects for partial clone and fetch */
+#define TRANS_OPT_LIST_OBJECTS_FILTER "filter"
+
 /**
  * Returns 0 if the option was used, non-zero otherwise. Prints a
  * message to stderr if the option is not used.