[PATCH 08/11] Resumable clone: create transport_download_primer

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Create function transport_download_primer and components
to invoke and pass commands to remote-curl.

Signed-off-by: Kevin Wern <kevin.m.wern@xxxxxxxxx>
---
 transport-helper.c | 24 ++++++++++++++++++++++++
 transport.c        |  9 +++++++++
 transport.h        |  7 +++++++
 3 files changed, 40 insertions(+)

diff --git a/transport-helper.c b/transport-helper.c
index eb185d5..2ff96ef 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -29,6 +29,7 @@ struct helper_data {
 		check_connectivity : 1,
 		no_disconnect_req : 1,
 		no_private_update : 1,
+		download_primer : 1,
 		prime_clone : 1;
 	char *export_marks;
 	char *import_marks;
@@ -183,6 +184,8 @@ static struct child_process *get_helper(struct transport *transport)
 			data->check_connectivity = 1;
 		else if (!strcmp(capname, "prime-clone"))
 			data->prime_clone = 1;
+		else if (!strcmp(capname, "download-primer"))
+			data->download_primer = 1;
 		else if (!data->refspecs && skip_prefix(capname, "refspec ", &arg)) {
 			ALLOC_GROW(refspecs,
 				   refspec_nr + 1,
@@ -1058,6 +1061,26 @@ static struct ref *get_refs_list(struct transport *transport, int for_push)
 	return ret;
 }
 
+static const char *download_primer(struct transport *transport,
+				   const struct alt_resource *res,
+				   const char *base_path)
+{
+	struct helper_data *data = transport->data;
+	struct child_process *helper;
+	struct strbuf buf = STRBUF_INIT, out = STRBUF_INIT;
+	char *ret = NULL;
+
+	helper = get_helper(transport);
+
+	strbuf_addf(&buf, "download-primer %s %s\n", res->url, base_path);
+	sendline(data, &buf);
+	recvline(data, &out);
+	strbuf_release(&buf);
+	if (out.len > 0)
+		ret = strbuf_detach(&out, NULL);
+	return ret;
+}
+
 static const struct alt_resource *const get_alt_res_helper(struct transport *transport)
 {
 	struct helper_data *data = transport->data;
@@ -1115,6 +1138,7 @@ int transport_helper_init(struct transport *transport, const char *name)
 	transport->data = data;
 	transport->set_option = set_helper_option;
 	transport->get_refs_list = get_refs_list;
+	transport->download_primer = download_primer;
 	transport->prime_clone = get_alt_res_helper;
 	transport->fetch = fetch;
 	transport->push_refs = push_refs;
diff --git a/transport.c b/transport.c
index dd0d839..3b33029 100644
--- a/transport.c
+++ b/transport.c
@@ -572,6 +572,15 @@ const struct alt_resource *const transport_prime_clone(struct transport *transpo
 	return transport->alt_res;
 }
 
+const char *transport_download_primer(struct transport *transport,
+				      const struct alt_resource *alt_res,
+				      const char *base_dir)
+{
+	if (transport->download_primer)
+		return transport->download_primer(transport, alt_res, base_dir);
+	return NULL;
+}
+
 static int connect_git(struct transport *transport, const char *name,
 		       const char *executable, int fd[2])
 {
diff --git a/transport.h b/transport.h
index 2bb6963..1484d6d 100644
--- a/transport.h
+++ b/transport.h
@@ -83,6 +83,10 @@ struct transport {
 	 **/
 	const struct alt_resource *const (*prime_clone)(struct transport *transport);
 
+	const char *(*download_primer)(struct transport *transport,
+			const struct alt_resource *alt_res,
+			const char *base_path);
+
 	/**
 	 * Fetch the objects for the given refs. Note that this gets
 	 * an array, and should ignore the list structure.
@@ -228,6 +232,9 @@ int transport_push(struct transport *connection,
 
 const struct ref *transport_get_remote_refs(struct transport *transport);
 const struct alt_resource *const transport_prime_clone(struct transport *transport);
+const char *transport_download_primer(struct transport *transport,
+		const struct alt_resource *alt_res,
+		const char *base_path);
 
 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 void transport_unlock_pack(struct transport *transport);
-- 
2.7.4




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