# HG changeset patch
# User Marcin Kuzminski <marcin@python-works.com>
# Date 2010-06-25 19:53:13
# Node ID a074dec6ee406333e076f474bf6c8c6a0caf1435
# Parent  29370bb76fa689dada511ca6e0dc5c6797926dc1

restored utils, wrongly deleted

diff --git a/pylons_app/lib/utils.py b/pylons_app/lib/utils.py
--- a/pylons_app/lib/utils.py
+++ b/pylons_app/lib/utils.py
@@ -0,0 +1,178 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Utilities for hg app
+# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
+# 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 April 18, 2010
+Utilities for hg app
+@author: marcink
+"""
+
+import os
+import logging
+from mercurial import ui, config, hg
+from mercurial.error import RepoError
+from pylons_app.model.db import Repository, User
+log = logging.getLogger(__name__)
+
+
+def get_repo_slug(request):
+    return request.environ['pylons.routes_dict'].get('repo_name')
+
+def is_mercurial(environ):
+    """
+    Returns True if request's target is mercurial server - header
+    ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
+    """
+    http_accept = environ.get('HTTP_ACCEPT')
+    if http_accept and http_accept.startswith('application/mercurial'):
+        return True
+    return False
+
+def check_repo_dir(paths):
+    repos_path = paths[0][1].split('/')
+    if repos_path[-1] in ['*', '**']:
+        repos_path = repos_path[:-1]
+    if repos_path[0] != '/':
+        repos_path[0] = '/'
+    if not os.path.isdir(os.path.join(*repos_path)):
+        raise Exception('Not a valid repository in %s' % paths[0][1])
+
+def check_repo(repo_name, base_path):
+
+    repo_path = os.path.join(base_path, repo_name)
+
+    try:
+        r = hg.repository(ui.ui(), repo_path)
+        hg.verify(r)
+        #here we hnow that repo exists it was verified
+        log.info('%s repo is already created', repo_name)
+        return False
+        #raise Exception('Repo exists')
+    except RepoError:
+        log.info('%s repo is free for creation', repo_name)
+        #it means that there is no valid repo there...
+        return True
+                
+def make_ui(path=None, checkpaths=True):        
+    """
+    A funcion that will read python rc files and make an ui from read options
+    
+    @param path: path to mercurial config file
+    """
+    if not path:
+        log.error('repos config path is empty !')
+    
+    if not os.path.isfile(path):
+        log.warning('Unable to read config file %s' % path)
+        return False
+    #propagated from mercurial documentation
+    sections = [
+                'alias',
+                'auth',
+                'decode/encode',
+                'defaults',
+                'diff',
+                'email',
+                'extensions',
+                'format',
+                'merge-patterns',
+                'merge-tools',
+                'hooks',
+                'http_proxy',
+                'smtp',
+                'patch',
+                'paths',
+                'profiling',
+                'server',
+                'trusted',
+                'ui',
+                'web',
+                ]
+
+    baseui = ui.ui()
+    cfg = config.config()
+    cfg.read(path)
+    if checkpaths:check_repo_dir(cfg.items('paths'))
+
+    for section in sections:
+        for k, v in cfg.items(section):
+            baseui.setconfig(section, k, v)
+    
+    return baseui
+
+def invalidate_cache(name, *args):
+    """Invalidates given name cache"""
+    
+    from beaker.cache import region_invalidate
+    log.info('INVALIDATING CACHE FOR %s', name)
+    
+    """propagate our arguments to make sure invalidation works. First
+    argument has to be the name of cached func name give to cache decorator
+    without that the invalidation would not work"""
+    tmp = [name]
+    tmp.extend(args)
+    args = tuple(tmp)
+    
+    if name == 'cached_repo_list':
+        from pylons_app.model.hg_model import _get_repos_cached
+        region_invalidate(_get_repos_cached, None, *args)
+        
+    if name == 'full_changelog':
+        from pylons_app.model.hg_model import _full_changelog_cached
+        region_invalidate(_full_changelog_cached, None, *args)
+        
+from vcs.backends.base import BaseChangeset
+from vcs.utils.lazy import LazyProperty
+class EmptyChangeset(BaseChangeset):
+    
+    revision = -1
+    message = ''
+    
+    @LazyProperty
+    def raw_id(self):
+        """
+        Returns raw string identifing this changeset, useful for web
+        representation.
+        """
+        return '0' * 12
+
+
+def repo2db_mapper(initial_repo_list):
+    """
+    maps all found repositories into db
+    """
+    from pylons_app.model.meta import Session
+    from pylons_app.model.repo_model import RepoModel
+    
+    sa = Session()
+    user = sa.query(User).filter(User.admin == True).first()
+    
+    rm = RepoModel()
+    
+    for name, repo in initial_repo_list.items():
+        if not sa.query(Repository).get(name):
+            log.info('repository %s not found creating default', name)
+                
+            form_data = {
+                         'repo_name':name,
+                         'description':repo.description if repo.description != 'unknown' else \
+                                        'auto description for %s' % name,
+                         'private':False
+                         }
+            rm.create(form_data, user, just_db=True)