mirror of
https://github.com/git/git.git
synced 2024-10-30 05:47:53 +01:00
373d70efb2
Create protocol.{c,h} and provide functions which future servers and
clients can use to determine which protocol to use or is being used.
Also introduce the 'GIT_PROTOCOL' environment variable which will be
used to communicate a colon separated list of keys with optional values
to a server. Unknown keys and values must be tolerated. This mechanism
is used to communicate which version of the wire protocol a client would
like to use with a server.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
#include "cache.h"
|
|
#include "config.h"
|
|
#include "protocol.h"
|
|
|
|
static enum protocol_version parse_protocol_version(const char *value)
|
|
{
|
|
if (!strcmp(value, "0"))
|
|
return protocol_v0;
|
|
else if (!strcmp(value, "1"))
|
|
return protocol_v1;
|
|
else
|
|
return protocol_unknown_version;
|
|
}
|
|
|
|
enum protocol_version get_protocol_version_config(void)
|
|
{
|
|
const char *value;
|
|
if (!git_config_get_string_const("protocol.version", &value)) {
|
|
enum protocol_version version = parse_protocol_version(value);
|
|
|
|
if (version == protocol_unknown_version)
|
|
die("unknown value for config 'protocol.version': %s",
|
|
value);
|
|
|
|
return version;
|
|
}
|
|
|
|
return protocol_v0;
|
|
}
|
|
|
|
enum protocol_version determine_protocol_version_server(void)
|
|
{
|
|
const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
|
|
enum protocol_version version = protocol_v0;
|
|
|
|
/*
|
|
* Determine which protocol version the client has requested. Since
|
|
* multiple 'version' keys can be sent by the client, indicating that
|
|
* the client is okay to speak any of them, select the greatest version
|
|
* that the client has requested. This is due to the assumption that
|
|
* the most recent protocol version will be the most state-of-the-art.
|
|
*/
|
|
if (git_protocol) {
|
|
struct string_list list = STRING_LIST_INIT_DUP;
|
|
const struct string_list_item *item;
|
|
string_list_split(&list, git_protocol, ':', -1);
|
|
|
|
for_each_string_list_item(item, &list) {
|
|
const char *value;
|
|
enum protocol_version v;
|
|
|
|
if (skip_prefix(item->string, "version=", &value)) {
|
|
v = parse_protocol_version(value);
|
|
if (v > version)
|
|
version = v;
|
|
}
|
|
}
|
|
|
|
string_list_clear(&list, 0);
|
|
}
|
|
|
|
return version;
|
|
}
|
|
|
|
enum protocol_version determine_protocol_version_client(const char *server_response)
|
|
{
|
|
enum protocol_version version = protocol_v0;
|
|
|
|
if (skip_prefix(server_response, "version ", &server_response)) {
|
|
version = parse_protocol_version(server_response);
|
|
|
|
if (version == protocol_unknown_version)
|
|
die("server is speaking an unknown protocol");
|
|
if (version == protocol_v0)
|
|
die("protocol error: server explicitly said version 0");
|
|
}
|
|
|
|
return version;
|
|
}
|