serve: introduce git-serve

diff --git a/transport.c b/transport.c
index 8e877909622b75a123b0430d96b93b0a66f7933e..83d9dd1df6b6bfe4070910e2707bf00fb2f5e8ba 100644 (file)
--- a/transport.c
+++ b/transport.c
@@ -18,6 +18,7 @@
 #include "sha1-array.h"
 #include "sigchain.h"
 #include "transport-internal.h"
+#include "protocol.h"
 
 static void set_upstreams(struct transport *transport, struct ref *refs,
        int pretend)
@@ -117,6 +118,7 @@ struct git_transport_data {
        struct child_process *conn;
        int fd[2];
        unsigned got_remote_heads : 1;
+       enum protocol_version version;
        struct oid_array extra_have;
        struct oid_array shallow;
 };
@@ -190,13 +192,30 @@ static int connect_setup(struct transport *transport, int for_push)
 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 {
        struct git_transport_data *data = transport->data;
-       struct ref *refs;
+       struct ref *refs = NULL;
+       struct packet_reader reader;
 
        connect_setup(transport, for_push);
-       get_remote_heads(data->fd[0], NULL, 0, &refs,
-                        for_push ? REF_NORMAL : 0,
-                        &data->extra_have,
-                        &data->shallow);
+
+       packet_reader_init(&reader, data->fd[0], NULL, 0,
+                          PACKET_READ_CHOMP_NEWLINE |
+                          PACKET_READ_GENTLE_ON_EOF);
+
+       data->version = discover_version(&reader);
+       switch (data->version) {
+       case protocol_v2:
+               die("support for protocol v2 not implemented yet");
+               break;
+       case protocol_v1:
+       case protocol_v0:
+               get_remote_heads(&reader, &refs,
+                                for_push ? REF_NORMAL : 0,
+                                &data->extra_have,
+                                &data->shallow);
+               break;
+       case protocol_unknown_version:
+               BUG("unknown protocol version");
+       }
        data->got_remote_heads = 1;
 
        return refs;
@@ -207,7 +226,7 @@ static int fetch_refs_via_pack(struct transport *transport,
 {
        int ret = 0;
        struct git_transport_data *data = transport->data;
-       struct ref *refs;
+       struct ref *refs = NULL;
        char *dest = xstrdup(transport->url);
        struct fetch_pack_args args;
        struct ref *refs_tmp = NULL;
@@ -233,10 +252,21 @@ static int fetch_refs_via_pack(struct transport *transport,
        if (!data->got_remote_heads)
                refs_tmp = get_refs_via_connect(transport, 0);
 
-       refs = fetch_pack(&args, data->fd, data->conn,
-                         refs_tmp ? refs_tmp : transport->remote_refs,
-                         dest, to_fetch, nr_heads, &data->shallow,
-                         &transport->pack_lockfile);
+       switch (data->version) {
+       case protocol_v2:
+               die("support for protocol v2 not implemented yet");
+               break;
+       case protocol_v1:
+       case protocol_v0:
+               refs = fetch_pack(&args, data->fd, data->conn,
+                                 refs_tmp ? refs_tmp : transport->remote_refs,
+                                 dest, to_fetch, nr_heads, &data->shallow,
+                                 &transport->pack_lockfile);
+               break;
+       case protocol_unknown_version:
+               BUG("unknown protocol version");
+       }
+
        close(data->fd[0]);
        close(data->fd[1]);
        if (finish_connect(data->conn))
@@ -535,7 +565,7 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
 {
        struct git_transport_data *data = transport->data;
        struct send_pack_args args;
-       int ret;
+       int ret = 0;
 
        if (!data->got_remote_heads)
                get_refs_via_connect(transport, 1);
@@ -560,8 +590,18 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
        else
                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 
-       ret = send_pack(&args, data->fd, data->conn, remote_refs,
-                       &data->extra_have);
+       switch (data->version) {
+       case protocol_v2:
+               die("support for protocol v2 not implemented yet");
+               break;
+       case protocol_v1:
+       case protocol_v0:
+               ret = send_pack(&args, data->fd, data->conn, remote_refs,
+                               &data->extra_have);
+               break;
+       case protocol_unknown_version:
+               BUG("unknown protocol version");
+       }
 
        close(data->fd[1]);
        close(data->fd[0]);