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

Signed-off-by: Kevin Wern <kevin.m.w...@gmail.com>
---
 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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