Mercurial > p > roundup > code

annotate roundup/instance.py @ 4098:3a4e006bbba0

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Fix issue1895192.
author Stefan Seefeld <stefan@seefeld.name>
date Thu, 12 Mar 2009 18:19:37 +0000
parents bbab97f8ffb2
children 61cf00ca920a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #
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2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
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8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
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9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
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10 # POSSIBILITY OF SUCH DAMAGE.
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11 #
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12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
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15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
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16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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17 #
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18
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19 """Tracker handling (open tracker).
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20
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21 Backwards compatibility for the old-style "imported" trackers.
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22 """
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23 __docformat__ = 'restructuredtext'
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24
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25 import os
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26 import sys
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27 from roundup import configuration, mailgw
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28 from roundup import hyperdb, backends, actions
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29 from roundup.cgi import client, templating
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30 from roundup.cgi import actions as cgi_actions
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31
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32 class Vars:
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33 def __init__(self, vars):
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34 self.__dict__.update(vars)
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35
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36 class Tracker:
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37 def __init__(self, tracker_home, optimize=0):
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38 """New-style tracker instance constructor
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39
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40 Parameters:
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41 tracker_home:
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42 tracker home directory
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43 optimize:
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44 if set, precompile html templates
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45
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46 """
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47 self.tracker_home = tracker_home
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48 self.optimize = optimize
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49 self.config = configuration.CoreConfig(tracker_home)
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50 self.actions = {}
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51 self.cgi_actions = {}
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52 self.templating_utils = {}
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53 self.load_interfaces()
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54 self.templates = templating.Templates(self.config["TEMPLATES"])
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55 self.backend = backends.get_backend(self.get_backend_name())
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56 if self.optimize:
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57 libdir = os.path.join(self.tracker_home, 'lib')
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58 if os.path.isdir(libdir):
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59 sys.path.insert(1, libdir)
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60 self.templates.precompileTemplates()
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61 # initialize tracker extensions
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62 for extension in self.get_extensions('extensions'):
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63 extension(self)
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64 # load database schema
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65 schemafilename = os.path.join(self.tracker_home, 'schema.py')
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66 # Note: can't use built-in open()
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67 # because of the global function with the same name
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68 schemafile = file(schemafilename, 'rt')
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69 self.schema = compile(schemafile.read(), schemafilename, 'exec')
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70 schemafile.close()
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71 # load database detectors
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72 self.detectors = self.get_extensions('detectors')
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73 # db_open is set to True after first open()
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74 self.db_open = 0
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75 if libdir in sys.path:
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76 sys.path.remove(libdir)
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77
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78 def get_backend_name(self):
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79 o = __builtins__['open']
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80 f = o(os.path.join(self.tracker_home, 'db', 'backend_name'))
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81 name = f.readline().strip()
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82 f.close()
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83 return name
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84
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85 def open(self, name=None):
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86 # load the database schema
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87 # we cannot skip this part even if self.optimize is set
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88 # because the schema has security settings that must be
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89 # applied to each database instance
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90 backend = self.backend
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91 vars = {
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92 'Class': backend.Class,
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93 'FileClass': backend.FileClass,
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94 'IssueClass': backend.IssueClass,
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95 'String': hyperdb.String,
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96 'Password': hyperdb.Password,
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97 'Date': hyperdb.Date,
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98 'Link': hyperdb.Link,
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99 'Multilink': hyperdb.Multilink,
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100 'Interval': hyperdb.Interval,
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101 'Boolean': hyperdb.Boolean,
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102 'Number': hyperdb.Number,
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103 'db': backend.Database(self.config, name)
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104 }
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105
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106 if self.optimize:
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107 # execute preloaded schema object
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108 exec(self.schema, vars)
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109 # use preloaded detectors
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110 detectors = self.detectors
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111 else:
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112 libdir = os.path.join(self.tracker_home, 'lib')
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113 if os.path.isdir(libdir):
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114 sys.path.insert(1, libdir)
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115 # execute the schema file
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116 self._load_python('schema.py', vars)
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117 # reload extensions and detectors
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118 for extension in self.get_extensions('extensions'):
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119 extension(self)
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120 detectors = self.get_extensions('detectors')
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121 if libdir in sys.path:
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122 sys.path.remove(libdir)
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123 db = vars['db']
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124 # apply the detectors
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125 for detector in detectors:
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126 detector(db)
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127 # if we are running in debug mode
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128 # or this is the first time the database is opened,
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129 # do database upgrade checks
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130 if not (self.optimize and self.db_open):
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131 db.post_init()
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132 self.db_open = 1
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133 return db
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134
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135 def load_interfaces(self):
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136 """load interfaces.py (if any), initialize Client and MailGW attrs"""
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137 vars = {}
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138 if os.path.isfile(os.path.join(self.tracker_home, 'interfaces.py')):
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139 self._load_python('interfaces.py', vars)
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140 self.Client = vars.get('Client', client.Client)
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141 self.MailGW = vars.get('MailGW', mailgw.MailGW)
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142
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143 def get_extensions(self, dirname):
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144 """Load python extensions
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145
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146 Parameters:
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147 dirname:
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148 extension directory name relative to tracker home
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149
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150 Return value:
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151 list of init() functions for each extension
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152
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153 """
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154 extensions = []
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155 dirpath = os.path.join(self.tracker_home, dirname)
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156 if os.path.isdir(dirpath):
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157 sys.path.insert(1, dirpath)
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158 for name in os.listdir(dirpath):
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159 if not name.endswith('.py'):
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160 continue
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161 vars = {}
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162 self._load_python(os.path.join(dirname, name), vars)
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163 extensions.append(vars['init'])
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164 sys.path.remove(dirpath)
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165 return extensions
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166
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167 def init(self, adminpw):
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168 db = self.open('admin')
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169 self._load_python('initial_data.py', {'db': db, 'adminpw': adminpw,
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170 'admin_email': self.config['ADMIN_EMAIL']})
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171 db.commit()
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172 db.close()
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173
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174 def exists(self):
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175 return self.backend.db_exists(self.config)
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176
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177 def nuke(self):
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178 self.backend.db_nuke(self.config)
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179
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180 def _load_python(self, file, vars):
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181 file = os.path.join(self.tracker_home, file)
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182 execfile(file, vars)
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183 return vars
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184
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185 def registerAction(self, name, action):
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186
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187 # The logic here is this:
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188 # * if `action` derives from actions.Action,
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189 # it is executable as a generic action.
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190 # * if, moreover, it also derives from cgi.actions.Bridge,
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191 # it may in addition be called via CGI
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192 # * in all other cases we register it as a CGI action, without
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193 # any check (for backward compatibility).
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194 if issubclass(action, actions.Action):
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195 self.actions[name] = action
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196 if issubclass(action, cgi_actions.Bridge):
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197 self.cgi_actions[name] = action
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198 else:
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199 self.cgi_actions[name] = action
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200
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201 def registerUtil(self, name, function):
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202 self.templating_utils[name] = function
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203
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204 class TrackerError(Exception):
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205 pass
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206
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207
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208 class OldStyleTrackers:
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209 def __init__(self):
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210 self.number = 0
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211 self.trackers = {}
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212
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213 def open(self, tracker_home, optimize=0):
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214 """Open the tracker.
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215
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216 Parameters:
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217 tracker_home:
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218 tracker home directory
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219 optimize:
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220 if set, precompile html templates
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221
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222 Raise ValueError if the tracker home doesn't exist.
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223
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224 """
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225 import imp
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226 # sanity check existence of tracker home
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227 if not os.path.exists(tracker_home):
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228 raise ValueError, 'no such directory: "%s"'%tracker_home
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229
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230 # sanity check tracker home contents
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231 for reqd in 'config dbinit select_db interfaces'.split():
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232 if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
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233 raise TrackerError, 'File "%s.py" missing from tracker '\
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234 'home "%s"'%(reqd, tracker_home)
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235
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236 if self.trackers.has_key(tracker_home):
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237 return imp.load_package(self.trackers[tracker_home],
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238 tracker_home)
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239 # register all available backend modules
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240 backends.list_backends()
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241 self.number = self.number + 1
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242 modname = '_roundup_tracker_%s'%self.number
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243 self.trackers[tracker_home] = modname
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244
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245 # load the tracker
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246 tracker = imp.load_package(modname, tracker_home)
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247
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248 # ensure the tracker has all the required bits
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249 for required in 'open init Client MailGW'.split():
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250 if not hasattr(tracker, required):
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251 raise TrackerError, \
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252 'Required tracker attribute "%s" missing'%required
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253
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254 # load and apply the config
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255 tracker.config = configuration.CoreConfig(tracker_home)
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256 tracker.dbinit.config = tracker.config
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257
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258 tracker.optimize = optimize
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259 tracker.templates = templating.Templates(tracker.config["TEMPLATES"])
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260 if optimize:
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261 tracker.templates.precompileTemplates()
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262
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263 return tracker
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264
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265 OldStyleTrackers = OldStyleTrackers()
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266 def open(tracker_home, optimize=0):
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267 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
d2801a2b0a77 Initial implementation (half-baked) at new Tracker instance.
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268 # user should upgrade...
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269 return OldStyleTrackers.open(tracker_home, optimize=optimize)
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270
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271 return Tracker(tracker_home, optimize=optimize)
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272
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273 # vim: set filetype=python sts=4 sw=4 et si :
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