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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "git2/types.h"
#include "git2/remote.h"
#include "git2/net.h"
#include "git2/transport.h"
#include "path.h"
typedef struct transport_definition {
char *prefix;
unsigned priority;
git_transport_cb fn;
void *param;
} transport_definition;
static transport_definition local_transport_definition = { "file://", 1, git_transport_local, NULL };
static transport_definition dummy_transport_definition = { NULL, 1, git_transport_dummy, NULL };
static git_smart_subtransport_definition http_subtransport_definition = { git_smart_subtransport_http, 1 };
static git_smart_subtransport_definition git_subtransport_definition = { git_smart_subtransport_git, 0 };
static transport_definition transports[] = {
{"git://", 1, git_transport_smart, &git_subtransport_definition},
{"http://", 1, git_transport_smart, &http_subtransport_definition},
{"https://", 1, git_transport_smart, &http_subtransport_definition},
{"file://", 1, git_transport_local, NULL},
{"git+ssh://", 1, git_transport_dummy, NULL},
{"ssh+git://", 1, git_transport_dummy, NULL},
{NULL, 0, 0}
};
#define GIT_TRANSPORT_COUNT (sizeof(transports)/sizeof(transports[0])) - 1
static int transport_find_fn(const char *url, git_transport_cb *callback, void **param)
{
size_t i = 0;
unsigned priority = 0;
transport_definition *definition = NULL, *definition_iter;
// First, check to see if it's an obvious URL, which a URL scheme
for (i = 0; i < GIT_TRANSPORT_COUNT; ++i) {
definition_iter = &transports[i];
if (strncasecmp(url, definition_iter->prefix, strlen(definition_iter->prefix)))
continue;
if (definition_iter->priority > priority)
definition = definition_iter;
}
#ifdef GIT_WIN32
/* On Windows, it might not be possible to discern between absolute local
* and ssh paths - first check if this is a valid local path that points
* to a directory and if so assume local path, else assume SSH */
/* Check to see if the path points to a file on the local file system */
if (!definition && git_path_exists(url) && git_path_isdir(url))
definition = &local_transport_definition;
/* It could be a SSH remote path. Check to see if there's a :
* SSH is an unsupported transport mechanism in this version of libgit2 */
if (!definition && strrchr(url, ':'))
definition = &dummy_transport_definition;
#else
/* For other systems, perform the SSH check first, to avoid going to the
* filesystem if it is not necessary */
/* It could be a SSH remote path. Check to see if there's a :
* SSH is an unsupported transport mechanism in this version of libgit2 */
if (!definition && strrchr(url, ':'))
definition = &dummy_transport_definition;
/* Check to see if the path points to a file on the local file system */
if (!definition && git_path_exists(url) && git_path_isdir(url))
definition = &local_transport_definition;
#endif
if (!definition)
return -1;
*callback = definition->fn;
*param = definition->param;
return 0;
}
/**************
* Public API *
**************/
int git_transport_dummy(git_transport **transport, git_remote *owner, void *param)
{
GIT_UNUSED(transport);
GIT_UNUSED(owner);
GIT_UNUSED(param);
giterr_set(GITERR_NET, "This transport isn't implemented. Sorry");
return -1;
}
int git_transport_new(git_transport **out, git_remote *owner, const char *url)
{
git_transport_cb fn;
git_transport *transport;
void *param;
int error;
if (transport_find_fn(url, &fn, ¶m) < 0) {
giterr_set(GITERR_NET, "Unsupported URL protocol");
return -1;
}
error = fn(&transport, owner, param);
if (error < 0)
return error;
*out = transport;
return 0;
}
/* from remote.h */
int git_remote_valid_url(const char *url)
{
git_transport_cb fn;
void *param;
return !transport_find_fn(url, &fn, ¶m);
}
int git_remote_supported_url(const char* url)
{
git_transport_cb fn;
void *param;
if (transport_find_fn(url, &fn, ¶m) < 0)
return 0;
return fn != &git_transport_dummy;
}
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