Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "config.h"
   3#include "protocol.h"
   4
   5static enum protocol_version parse_protocol_version(const char *value)
   6{
   7        if (!strcmp(value, "0"))
   8                return protocol_v0;
   9        else if (!strcmp(value, "1"))
  10                return protocol_v1;
  11        else if (!strcmp(value, "2"))
  12                return protocol_v2;
  13        else
  14                return protocol_unknown_version;
  15}
  16
  17enum protocol_version get_protocol_version_config(void)
  18{
  19        const char *value;
  20        if (!git_config_get_string_const("protocol.version", &value)) {
  21                enum protocol_version version = parse_protocol_version(value);
  22
  23                if (version == protocol_unknown_version)
  24                        die("unknown value for config 'protocol.version': %s",
  25                            value);
  26
  27                return version;
  28        }
  29
  30        return protocol_v0;
  31}
  32
  33enum protocol_version determine_protocol_version_server(void)
  34{
  35        const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
  36        enum protocol_version version = protocol_v0;
  37
  38        /*
  39         * Determine which protocol version the client has requested.  Since
  40         * multiple 'version' keys can be sent by the client, indicating that
  41         * the client is okay to speak any of them, select the greatest version
  42         * that the client has requested.  This is due to the assumption that
  43         * the most recent protocol version will be the most state-of-the-art.
  44         */
  45        if (git_protocol) {
  46                struct string_list list = STRING_LIST_INIT_DUP;
  47                const struct string_list_item *item;
  48                string_list_split(&list, git_protocol, ':', -1);
  49
  50                for_each_string_list_item(item, &list) {
  51                        const char *value;
  52                        enum protocol_version v;
  53
  54                        if (skip_prefix(item->string, "version=", &value)) {
  55                                v = parse_protocol_version(value);
  56                                if (v > version)
  57                                        version = v;
  58                        }
  59                }
  60
  61                string_list_clear(&list, 0);
  62        }
  63
  64        return version;
  65}
  66
  67enum protocol_version determine_protocol_version_client(const char *server_response)
  68{
  69        enum protocol_version version = protocol_v0;
  70
  71        if (skip_prefix(server_response, "version ", &server_response)) {
  72                version = parse_protocol_version(server_response);
  73
  74                if (version == protocol_unknown_version)
  75                        die("server is speaking an unknown protocol");
  76                if (version == protocol_v0)
  77                        die("protocol error: server explicitly said version 0");
  78        }
  79
  80        return version;
  81}