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annotate pylons_app/lib/utils.py @ 343:6484963056cd

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implemented cache for repeated queries in simplehg mercurial requests
author Marcin Kuzminski <marcin@python-works.com>
date Wed, 14 Jul 2010 12:31:11 +0200
parents 1ef52a70f3b7
children bb8f45f6d8f9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 # encoding: utf-8
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3 # Utilities for hg app
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4 # Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
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5 # This program is free software; you can redistribute it and/or
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6 # modify it under the terms of the GNU General Public License
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7 # as published by the Free Software Foundation; version 2
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8 # of the License or (at your opinion) any later version of the license.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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18 # MA 02110-1301, USA.
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19 from beaker.cache import cache_region
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20
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21 """
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22 Created on April 18, 2010
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23 Utilities for hg app
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24 @author: marcink
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25 """
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26
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27 import os
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28 import logging
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29 from mercurial import ui, config, hg
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30 from mercurial.error import RepoError
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31 from pylons_app.model.db import Repository, User, HgAppUi
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32 log = logging.getLogger(__name__)
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33
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34
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35 def get_repo_slug(request):
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36 return request.environ['pylons.routes_dict'].get('repo_name')
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37
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38 def is_mercurial(environ):
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39 """
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40 Returns True if request's target is mercurial server - header
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41 ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
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42 """
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43 http_accept = environ.get('HTTP_ACCEPT')
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44 if http_accept and http_accept.startswith('application/mercurial'):
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45 return True
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46 return False
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47
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48 def check_repo_dir(paths):
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49 repos_path = paths[0][1].split('/')
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50 if repos_path[-1] in ['*', '**']:
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51 repos_path = repos_path[:-1]
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52 if repos_path[0] != '/':
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53 repos_path[0] = '/'
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54 if not os.path.isdir(os.path.join(*repos_path)):
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55 raise Exception('Not a valid repository in %s' % paths[0][1])
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56
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57 def check_repo_fast(repo_name, base_path):
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58 if os.path.isdir(os.path.join(base_path, repo_name)):return False
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59 return True
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60
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61 def check_repo(repo_name, base_path, verify=True):
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62
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63 repo_path = os.path.join(base_path, repo_name)
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64
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65 try:
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66 if not check_repo_fast(repo_name, base_path):
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67 return False
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68 r = hg.repository(ui.ui(), repo_path)
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69 if verify:
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70 hg.verify(r)
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71 #here we hnow that repo exists it was verified
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72 log.info('%s repo is already created', repo_name)
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73 return False
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74 except RepoError:
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75 #it means that there is no valid repo there...
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76 log.info('%s repo is free for creation', repo_name)
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77 return True
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78
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79
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80 @cache_region('super_short_term', 'cached_hg_ui')
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81 def get_hg_ui_cached():
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82 from pylons_app.model.meta import Session
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83 sa = Session()
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84 return sa.query(HgAppUi).all()
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85
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86 def make_ui(read_from='file', path=None, checkpaths=True):
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87 """
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88 A function that will read python rc files or database
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89 and make an mercurial ui object from read options
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90
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91 @param path: path to mercurial config file
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92 @param checkpaths: check the path
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93 @param read_from: read from 'file' or 'db'
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94 """
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95 #propagated from mercurial documentation
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96 sections = ['alias', 'auth',
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97 'decode/encode', 'defaults',
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98 'diff', 'email',
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99 'extensions', 'format',
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100 'merge-patterns', 'merge-tools',
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101 'hooks', 'http_proxy',
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102 'smtp', 'patch',
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103 'paths', 'profiling',
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104 'server', 'trusted',
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105 'ui', 'web', ]
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106 baseui = ui.ui()
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107
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108
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109 if read_from == 'file':
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110 if not os.path.isfile(path):
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111 log.warning('Unable to read config file %s' % path)
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112 return False
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113
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114 cfg = config.config()
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115 cfg.read(path)
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116 for section in sections:
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117 for k, v in cfg.items(section):
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118 baseui.setconfig(section, k, v)
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119 if checkpaths:check_repo_dir(cfg.items('paths'))
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120
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121
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122 elif read_from == 'db':
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123 hg_ui = get_hg_ui_cached()
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124 for ui_ in hg_ui:
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125 baseui.setconfig(ui_.ui_section, ui_.ui_key, ui_.ui_value)
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126
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127
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128 return baseui
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129
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131 def set_hg_app_config(config):
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132 config['hg_app_auth_realm'] = 'realm'
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133 config['hg_app_name'] = 'app name'
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134
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135 def invalidate_cache(name, *args):
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136 """Invalidates given name cache"""
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137
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138 from beaker.cache import region_invalidate
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139 log.info('INVALIDATING CACHE FOR %s', name)
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140
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141 """propagate our arguments to make sure invalidation works. First
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142 argument has to be the name of cached func name give to cache decorator
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143 without that the invalidation would not work"""
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144 tmp = [name]
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145 tmp.extend(args)
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146 args = tuple(tmp)
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147
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148 if name == 'cached_repo_list':
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149 from pylons_app.model.hg_model import _get_repos_cached
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150 region_invalidate(_get_repos_cached, None, *args)
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151
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152 if name == 'full_changelog':
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153 from pylons_app.model.hg_model import _full_changelog_cached
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154 region_invalidate(_full_changelog_cached, None, *args)
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155
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156 from vcs.backends.base import BaseChangeset
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157 from vcs.utils.lazy import LazyProperty
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158 class EmptyChangeset(BaseChangeset):
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159
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160 revision = -1
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161 message = ''
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162
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163 @LazyProperty
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164 def raw_id(self):
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165 """
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166 Returns raw string identifing this changeset, useful for web
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167 representation.
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168 """
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169 return '0' * 12
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170
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171
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172 def repo2db_mapper(initial_repo_list):
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173 """
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174 maps all found repositories into db
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175 """
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176 from pylons_app.model.meta import Session
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177 from pylons_app.model.repo_model import RepoModel
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178
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179 sa = Session()
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180 user = sa.query(User).filter(User.admin == True).first()
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181
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182 rm = RepoModel()
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183
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184 for name, repo in initial_repo_list.items():
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185 if not sa.query(Repository).get(name):
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186 log.info('repository %s not found creating default', name)
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187
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188 form_data = {
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189 'repo_name':name,
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190 'description':repo.description if repo.description != 'unknown' else \
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191 'auto description for %s' % name,
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192 'private':False
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193 }
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194 rm.create(form_data, user, just_db=True)