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        enum protocol_version retval = protocol_v0;
  21        const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION";
  22        const char *git_test_v = getenv(git_test_k);
  23
  24        if (!git_config_get_string_const("protocol.version", &value)) {
  25                enum protocol_version version = parse_protocol_version(value);
  26
  27                if (version == protocol_unknown_version)
  28                        die("unknown value for config 'protocol.version': %s",
  29                            value);
  30
  31                retval = version;
  32        }
  33
  34        if (git_test_v && *git_test_v) {
  35                enum protocol_version env = parse_protocol_version(git_test_v);
  36
  37                if (env == protocol_unknown_version)
  38                        die("unknown value for %s: %s", git_test_k, git_test_v);
  39                if (retval < env)
  40                        retval = env;
  41        }
  42
  43        return retval;
  44}
  45
  46enum protocol_version determine_protocol_version_server(void)
  47{
  48        const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
  49        enum protocol_version version = protocol_v0;
  50
  51        /*
  52         * Determine which protocol version the client has requested.  Since
  53         * multiple 'version' keys can be sent by the client, indicating that
  54         * the client is okay to speak any of them, select the greatest version
  55         * that the client has requested.  This is due to the assumption that
  56         * the most recent protocol version will be the most state-of-the-art.
  57         */
  58        if (git_protocol) {
  59                struct string_list list = STRING_LIST_INIT_DUP;
  60                const struct string_list_item *item;
  61                string_list_split(&list, git_protocol, ':', -1);
  62
  63                for_each_string_list_item(item, &list) {
  64                        const char *value;
  65                        enum protocol_version v;
  66
  67                        if (skip_prefix(item->string, "version=", &value)) {
  68                                v = parse_protocol_version(value);
  69                                if (v > version)
  70                                        version = v;
  71                        }
  72                }
  73
  74                string_list_clear(&list, 0);
  75        }
  76
  77        return version;
  78}
  79
  80enum protocol_version determine_protocol_version_client(const char *server_response)
  81{
  82        enum protocol_version version = protocol_v0;
  83
  84        if (skip_prefix(server_response, "version ", &server_response)) {
  85                version = parse_protocol_version(server_response);
  86
  87                if (version == protocol_unknown_version)
  88                        die("server is speaking an unknown protocol");
  89                if (version == protocol_v0)
  90                        die("protocol error: server explicitly said version 0");
  91        }
  92
  93        return version;
  94}