vcs-lib: code cleanup

rhodecode/lib/vcs/__init__.py

@@ -1,191 +1,186 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2014-2018 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 """
 Various version Control System version lib (vcs) management abstraction layer
 for Python. Build with server client architecture.
 """
+import atexit
+import logging
+import urlparse
+from cStringIO import StringIO
 
+from rhodecode.lib.vcs.conf import settings
+from rhodecode.lib.vcs.backends import get_vcs_instance, get_backend
+from rhodecode.lib.vcs.exceptions import (
+    VCSError, RepositoryError, CommitError, VCSCommunicationError)
 
 VERSION = (0, 5, 0, 'dev')
 
 __version__ = '.'.join((str(each) for each in VERSION[:4]))
 
 __all__ = [
     'get_version', 'get_vcs_instance', 'get_backend',
-    'VCSError', 'RepositoryError', 'CommitError'
+    'VCSError', 'RepositoryError', 'CommitError', 'VCSCommunicationError'
     ]
 
-import atexit
-import logging
-import subprocess32
-import time
-import urlparse
-from cStringIO import StringIO
-
-
-from rhodecode.lib.vcs.conf import settings
-from rhodecode.lib.vcs.backends import get_vcs_instance, get_backend
-from rhodecode.lib.vcs.exceptions import (
-    VCSError, RepositoryError, CommitError, VCSCommunicationError)
-
 log = logging.getLogger(__name__)
 
 # The pycurl library directly accesses C API functions and is not patched by
 # gevent. This will potentially lead to deadlocks due to incompatibility to
 # gevent. Therefore we check if gevent is active and import a gevent compatible
 # wrapper in that case.
 try:
     from gevent import monkey
     if monkey.is_module_patched('__builtin__'):
         import geventcurl as pycurl
         log.debug('Using gevent comapatible pycurl: %s', pycurl)
     else:
         import pycurl
 except ImportError:
     import pycurl
 
 
 def get_version():
     """
     Returns shorter version (digit parts only) as string.
     """
     return '.'.join((str(each) for each in VERSION[:3]))
 
 
 def connect_http(server_and_port):
     from rhodecode.lib.vcs import connection, client_http
     from rhodecode.lib.middleware.utils import scm_app
 
     session_factory = client_http.ThreadlocalSessionFactory()
 
     connection.Git = client_http.RepoMaker(
         server_and_port, '/git', 'git', session_factory)
     connection.Hg = client_http.RepoMaker(
         server_and_port, '/hg', 'hg', session_factory)
     connection.Svn = client_http.RepoMaker(
         server_and_port, '/svn', 'svn', session_factory)
     connection.Service = client_http.ServiceConnection(
         server_and_port, '/_service', session_factory)
 
     scm_app.HG_REMOTE_WSGI = client_http.VcsHttpProxy(
         server_and_port, '/proxy/hg')
     scm_app.GIT_REMOTE_WSGI = client_http.VcsHttpProxy(
         server_and_port, '/proxy/git')
 
     @atexit.register
     def free_connection_resources():
         connection.Git = None
         connection.Hg = None
         connection.Svn = None
         connection.Service = None
 
 
 def connect_vcs(server_and_port, protocol):
     """
     Initializes the connection to the vcs server.
 
     :param server_and_port: str, e.g. "localhost:9900"
     :param protocol: str or "http"
     """
     if protocol == 'http':
         connect_http(server_and_port)
     else:
         raise Exception('Invalid vcs server protocol "{}"'.format(protocol))
 
 
 def create_vcsserver_proxy(server_and_port, protocol):
     if protocol == 'http':
         return _create_vcsserver_proxy_http(server_and_port)
     else:
         raise Exception('Invalid vcs server protocol "{}"'.format(protocol))
 
 
 def _create_vcsserver_proxy_http(server_and_port):
     from rhodecode.lib.vcs import client_http
 
     session = _create_http_rpc_session()
     url = urlparse.urljoin('http://%s' % server_and_port, '/server')
     return client_http.RemoteObject(url, session)
 
 
 class CurlSession(object):
     """
     Modeled so that it provides a subset of the requests interface.
 
     This has been created so that it does only provide a minimal API for our
     needs. The parts which it provides are based on the API of the library
     `requests` which allows us to easily benchmark against it.
 
     Please have a look at the class :class:`requests.Session` when you extend
     it.
     """
 
     def __init__(self):
         curl = pycurl.Curl()
         # TODO: johbo: I did test with 7.19 of libcurl. This version has
         # trouble with 100 - continue being set in the expect header. This
         # can lead to massive performance drops, switching it off here.
         curl.setopt(curl.HTTPHEADER, ["Expect:"])
         curl.setopt(curl.TCP_NODELAY, True)
         curl.setopt(curl.PROTOCOLS, curl.PROTO_HTTP)
         self._curl = curl
 
     def post(self, url, data, allow_redirects=False):
         response_buffer = StringIO()
 
         curl = self._curl
         curl.setopt(curl.URL, url)
         curl.setopt(curl.POST, True)
         curl.setopt(curl.POSTFIELDS, data)
         curl.setopt(curl.FOLLOWLOCATION, allow_redirects)
         curl.setopt(curl.WRITEDATA, response_buffer)
         curl.perform()
 
         status_code = curl.getinfo(pycurl.HTTP_CODE)
 
         return CurlResponse(response_buffer, status_code)
 
 
 class CurlResponse(object):
     """
     The response of a request, modeled after the requests API.
 
     This class provides a subset of the response interface known from the
     library `requests`. It is intentionally kept similar, so that we can use
     `requests` as a drop in replacement for benchmarking purposes.
     """
 
     def __init__(self, response_buffer, status_code):
         self._response_buffer = response_buffer
         self._status_code = status_code
 
     @property
     def content(self):
         return self._response_buffer.getvalue()
 
     @property
     def status_code(self):
         return self._status_code
 
 
 def _create_http_rpc_session():
     session = CurlSession()
     return session