fixes #20 hg middleware breaks ui() instance when repository has hgrc file.

hgrc file now updates application ui instance with only those section that are present.

pylons_app/lib/middleware/simplehg.py

@@ -1,233 +1,250 b''
 #!/usr/bin/env python
 # encoding: utf-8
 # middleware to handle mercurial api calls
 # Copyright (C) 2009-2010 Marcin Kuzminski <[e-mail]>
-
+#
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; version 2
 # of the License or (at your opinion) any later version of the license.
 # 
 # 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 General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 # MA  02110-1301, USA.
-
-"""
-Created on 2010-04-28
-
-@author: marcink
-SimpleHG middleware for handling mercurial protocol request (push/clone etc.)
-It's implemented with basic auth function
-"""
 from datetime import datetime
 from itertools import chain
 from mercurial.error import RepoError
 from mercurial.hgweb import hgweb
 from mercurial.hgweb.request import wsgiapplication
 from paste.auth.basic import AuthBasicAuthenticator
 from paste.httpheaders import REMOTE_USER, AUTH_TYPE
 from pylons_app.lib.auth import authfunc, HasPermissionAnyMiddleware, \
     get_user_cached
 from pylons_app.lib.utils import is_mercurial, make_ui, invalidate_cache, \
-    check_repo_fast
+    check_repo_fast, ui_sections
 from pylons_app.model import meta
 from pylons_app.model.db import UserLog, User
 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError
 import logging
 import os
 import pylons_app.lib.helpers as h
 import traceback
  
+"""
+Created on 2010-04-28
+
+@author: marcink
+SimpleHG middleware for handling mercurial protocol request (push/clone etc.)
+It's implemented with basic auth function
+"""
+ 
 log = logging.getLogger(__name__)
 
 class SimpleHg(object):
 
     def __init__(self, application, config):
         self.application = application
         self.config = config
         #authenticate this mercurial request using 
         self.authenticate = AuthBasicAuthenticator('', authfunc)
         
     def __call__(self, environ, start_response):
         if not is_mercurial(environ):
             return self.application(environ, start_response)
 
         #===================================================================
         # AUTHENTICATE THIS MERCURIAL REQUEST
         #===================================================================
         username = REMOTE_USER(environ)
         if not username:
             self.authenticate.realm = self.config['hg_app_realm']
             result = self.authenticate(environ)
             if isinstance(result, str):
                 AUTH_TYPE.update(environ, 'basic')
                 REMOTE_USER.update(environ, result)
             else:
                 return result.wsgi_application(environ, start_response)
         
         try:
             repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:])
         except:
             log.error(traceback.format_exc())
             return HTTPInternalServerError()(environ, start_response)
         
         #===================================================================
         # CHECK PERMISSIONS FOR THIS REQUEST
         #===================================================================
         action = self.__get_action(environ)
         if action:
             username = self.__get_environ_user(environ)
             try:
                 user = self.__get_user(username)
             except:
                 log.error(traceback.format_exc())
                 return HTTPInternalServerError()(environ, start_response)
             #check permissions for this repository
             if action == 'pull':
                 if not HasPermissionAnyMiddleware('repository.read',
                                                   'repository.write',
                                                   'repository.admin')\
                                                     (user, repo_name):
                     return HTTPForbidden()(environ, start_response)
             if action == 'push':
                 if not HasPermissionAnyMiddleware('repository.write',
                                                   'repository.admin')\
                                                     (user, repo_name):
                     return HTTPForbidden()(environ, start_response)
             
             #log action    
             proxy_key = 'HTTP_X_REAL_IP'
             def_key = 'REMOTE_ADDR'
             ipaddr = environ.get(proxy_key, environ.get(def_key, '0.0.0.0'))
             self.__log_user_action(user, action, repo_name, ipaddr)            
         
         #===================================================================
         # MERCURIAL REQUEST HANDLING
         #===================================================================
         environ['PATH_INFO'] = '/'#since we wrap into hgweb, reset the path
         self.baseui = make_ui('db')
         self.basepath = self.config['base_path']
         self.repo_path = os.path.join(self.basepath, repo_name)
 
         #quick check if that dir exists...
         if check_repo_fast(repo_name, self.basepath):
             return HTTPNotFound()(environ, start_response)
         try:
             app = wsgiapplication(self.__make_app)
         except RepoError as e:
             if str(e).find('not found') != -1:
                 return HTTPNotFound()(environ, start_response)
         except Exception:
             log.error(traceback.format_exc())
             return HTTPInternalServerError()(environ, start_response)
         
         #invalidate cache on push
         if action == 'push':
             self.__invalidate_cache(repo_name)
             messages = []
             messages.append('thank you for using hg-app')
         
             return self.msg_wrapper(app, environ, start_response, messages)
         else:
             return app(environ, start_response)           
 
 
     def msg_wrapper(self, app, environ, start_response, messages=[]):
         """
         Wrapper for custom messages that come out of mercurial respond messages
         is a list of messages that the user will see at the end of response 
         from merurial protocol actions that involves remote answers
         @param app:
         @param environ:
         @param start_response:
         """
         def custom_messages(msg_list):
             for msg in msg_list:
                 yield msg + '\n'
         org_response = app(environ, start_response)
         return chain(org_response, custom_messages(messages))
 
     def __make_app(self):
         hgserve = hgweb(str(self.repo_path), baseui=self.baseui)
         return  self.__load_web_settings(hgserve)
     
     def __get_environ_user(self, environ):
         return environ.get('REMOTE_USER')
     
     def __get_user(self, username):
         return get_user_cached(username)
         
         
                         
     def __get_size(self, repo_path, content_size):
         size = int(content_size)
         for path, dirs, files in os.walk(repo_path):
             if path.find('.hg') == -1:
                 for f in files:
                     size += os.path.getsize(os.path.join(path, f))
         return size
         return h.format_byte_size(size)
         
     def __get_action(self, environ):
         """
         Maps mercurial request commands into a pull or push command.
         @param environ:
         """
         mapping = {'changegroup': 'pull',
                    'changegroupsubset': 'pull',
                    'stream_out': 'pull',
                    'listkeys': 'pull',
                    'unbundle': 'push',
                    'pushkey': 'push', }
         
         for qry in environ['QUERY_STRING'].split('&'):
             if qry.startswith('cmd'):
                 cmd = qry.split('=')[-1]
                 if mapping.has_key(cmd):
                     return mapping[cmd]
     
     def __log_user_action(self, user, action, repo, ipaddr):
         sa = meta.Session
         try:
             user_log = UserLog()
             user_log.user_id = user.user_id
             user_log.action = action
             user_log.repository = repo.replace('/', '')
             user_log.action_date = datetime.now()
             user_log.user_ip = ipaddr
             sa.add(user_log)
             sa.commit()
             log.info('Adding user %s, action %s on %s',
                                             user.username, action, repo)
         except Exception as e:
             sa.rollback()
             log.error('could not log user action:%s', str(e))
         finally:
             meta.Session.remove()
         
     def __invalidate_cache(self, repo_name):
         """we know that some change was made to repositories and we should
         invalidate the cache to see the changes right away but only for
         push requests"""
         invalidate_cache('cached_repo_list')
         invalidate_cache('full_changelog', repo_name)
            
                    
     def __load_web_settings(self, hgserve):
         #set the global ui for hgserve
         hgserve.repo.ui = self.baseui
         
         hgrc = os.path.join(self.repo_path, '.hg', 'hgrc')
         repoui = make_ui('file', hgrc, False)
         
+        
         if repoui:
-            #set the repository based config
-            hgserve.repo.ui = repoui
+            #overwrite our ui instance with the section from hgrc file
+            for section in ui_sections:
+                for k, v in repoui.configitems(section):
+                    hgserve.repo.ui.setconfig(section, k, v)
             
         return hgserve
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