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annotate roundup/instance.py @ 5010:0428d2004a86

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Fix exception handling to be python2.5 compatible The exception handling introduced in commit hg:494d2550: Display errors containing HTML with RejectRaw (issue2550847) contained the new style of exception handling that is not compatible with python2.5. Rework these exception handlers to use the old style to maintain compatibility with python2.5
author John Kristensen <john@jerrykan.com>
date Wed, 06 Jan 2016 16:02:34 +1100
parents 6e9b9743de89
children 7920d700e580 5251e97b1de0
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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 """Top-level tracker interface.
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20
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21 Open a tracker with:
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22
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23 >>> from roundup import instance
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24 >>> db = instance.open('path to tracker home')
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25
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26 The "db" handle you get back is the tracker's hyperdb which has the interface
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27 described in `roundup.hyperdb.Database`.
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28 """
2005
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29 __docformat__ = 'restructuredtext'
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30
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31 import os
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32 import sys
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33 from roundup import configuration, mailgw
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34 from roundup import hyperdb, backends, actions
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35 from roundup.cgi import client, templating
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36 from roundup.cgi import actions as cgi_actions
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37
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38 class Tracker:
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39 def __init__(self, tracker_home, optimize=0):
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40 """New-style tracker instance constructor
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41
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42 Parameters:
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43 tracker_home:
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44 tracker home directory
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45 optimize:
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46 if set, precompile html templates
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47
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48 """
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49 self.tracker_home = tracker_home
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50 self.optimize = optimize
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51 # if set, call schema_hook after executing schema.py will get
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52 # same variables (in particular db) as schema.py main purpose is
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53 # for regression tests
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54 self.schema_hook = None
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55 self.config = configuration.CoreConfig(tracker_home)
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56 self.actions = {}
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57 self.cgi_actions = {}
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58 self.templating_utils = {}
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60 libdir = os.path.join(self.tracker_home, 'lib')
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61 self.libdir = os.path.isdir(libdir) and libdir or ''
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62
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63 self.load_interfaces()
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64 self.templates = templating.get_loader(self.config["TEMPLATES"],
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65 self.config["TEMPLATE_ENGINE"])
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66 self.backend = backends.get_backend(self.get_backend_name())
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67
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68 if self.optimize:
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69 self.templates.precompile()
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70 # initialize tracker extensions
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71 for extension in self.get_extensions('extensions'):
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72 extension(self)
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73 # load database schema
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74 self.schema = self._compile('schema.py')
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75 # load database detectors
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76 self.detectors = self.get_extensions('detectors')
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77 # db_open is set to True after first open()
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78 self.db_open = 0
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79
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80 def get_backend_name(self):
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81 f = file(os.path.join(self.config.DATABASE, 'backend_name'))
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82 name = f.readline().strip()
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83 f.close()
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84 return name
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85
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86 def open(self, name=None):
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87 # load the database schema
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88 # we cannot skip this part even if self.optimize is set
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89 # because the schema has security settings that must be
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90 # applied to each database instance
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91 backend = self.backend
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92 env = {
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93 'Class': backend.Class,
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94 'FileClass': backend.FileClass,
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95 'IssueClass': backend.IssueClass,
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96 'String': hyperdb.String,
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97 'Password': hyperdb.Password,
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98 'Date': hyperdb.Date,
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99 'Link': hyperdb.Link,
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100 'Multilink': hyperdb.Multilink,
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101 'Interval': hyperdb.Interval,
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102 'Boolean': hyperdb.Boolean,
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103 'Number': hyperdb.Number,
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104 'db': backend.Database(self.config, name)
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105 }
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106
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107 if self.optimize:
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108 # execute preloaded schema object
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109 self._exec(self.schema, env)
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110 if callable (self.schema_hook):
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111 self.schema_hook(**env)
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112 # use preloaded detectors
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113 detectors = self.detectors
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114 else:
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115 # execute the schema file
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116 self._execfile('schema.py', env)
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117 if callable (self.schema_hook):
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118 self.schema_hook(**env)
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119 # reload extensions and detectors
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120 for extension in self.get_extensions('extensions'):
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121 extension(self)
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122 detectors = self.get_extensions('detectors')
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123 db = env['db']
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124 db.tx_Source = None
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125
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126 # apply the detectors
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127 for detector in detectors:
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128 detector(db)
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129 # if we are running in debug mode
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130 # or this is the first time the database is opened,
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131 # do database upgrade checks
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132 if not (self.optimize and self.db_open):
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133 # As a consistency check, ensure that every link property is
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134 # pointing at a defined class. Otherwise, the schema is
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135 # internally inconsistent. This is an important safety
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136 # measure as it protects against an accidental schema change
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137 # dropping a table while there are still links to the table;
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138 # once the table has been dropped, there is no way to get it
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139 # back, so it is important to drop it only if we are as sure
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140 # as possible that it is no longer needed.
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141 classes = db.getclasses()
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142 for classname in classes:
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143 cl = db.getclass(classname)
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144 for propname, prop in cl.getprops().iteritems():
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145 if not isinstance(prop, (hyperdb.Link,
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146 hyperdb.Multilink)):
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147 continue
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148 linkto = prop.classname
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149 if linkto not in classes:
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150 raise ValueError, \
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151 ("property %s.%s links to non-existent class %s"
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152 % (classname, propname, linkto))
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153
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154 db.post_init()
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155 self.db_open = 1
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156 return db
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157
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158 def load_interfaces(self):
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159 """load interfaces.py (if any), initialize Client and MailGW attrs"""
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160 env = {}
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161 if os.path.isfile(os.path.join(self.tracker_home, 'interfaces.py')):
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162 self._execfile('interfaces.py', env)
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163 self.Client = env.get('Client', client.Client)
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164 self.MailGW = env.get('MailGW', mailgw.MailGW)
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165 self.TemplatingUtils = env.get('TemplatingUtils', templating.TemplatingUtils)
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166
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167 def get_extensions(self, dirname):
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168 """Load python extensions
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169
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170 Parameters:
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171 dirname:
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172 extension directory name relative to tracker home
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173
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174 Return value:
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175 list of init() functions for each extension
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176
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177 """
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178 extensions = []
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179 dirpath = os.path.join(self.tracker_home, dirname)
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180 if os.path.isdir(dirpath):
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181 sys.path.insert(1, dirpath)
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182 for name in os.listdir(dirpath):
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183 if not name.endswith('.py'):
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184 continue
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185 env = {}
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186 self._execfile(os.path.join(dirname, name), env)
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187 extensions.append(env['init'])
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188 sys.path.remove(dirpath)
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189 return extensions
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190
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191 def init(self, adminpw):
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192 db = self.open('admin')
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193 self._execfile('initial_data.py', {'db': db, 'adminpw': adminpw,
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194 'admin_email': self.config['ADMIN_EMAIL']})
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195 db.commit()
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196 db.close()
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197
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198 def exists(self):
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199 return self.backend.db_exists(self.config)
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200
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201 def nuke(self):
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202 self.backend.db_nuke(self.config)
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203
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204 def _compile(self, fname):
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205 fname = os.path.join(self.tracker_home, fname)
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206 return compile(file(fname).read(), fname, 'exec')
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207
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208 def _exec(self, obj, env):
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209 if self.libdir:
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210 sys.path.insert(1, self.libdir)
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211 exec(obj, env)
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212 if self.libdir:
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213 sys.path.remove(self.libdir)
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214 return env
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215
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216 def _execfile(self, fname, env):
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217 self._exec(self._compile(fname), env)
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218
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219 def registerAction(self, name, action):
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220
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221 # The logic here is this:
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222 # * if `action` derives from actions.Action,
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223 # it is executable as a generic action.
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224 # * if, moreover, it also derives from cgi.actions.Bridge,
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225 # it may in addition be called via CGI
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226 # * in all other cases we register it as a CGI action, without
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227 # any check (for backward compatibility).
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228 if issubclass(action, actions.Action):
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229 self.actions[name] = action
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230 if issubclass(action, cgi_actions.Bridge):
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231 self.cgi_actions[name] = action
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232 else:
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233 self.cgi_actions[name] = action
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234
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235 def registerUtil(self, name, function):
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236 self.templating_utils[name] = function
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237
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238 class TrackerError(Exception):
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239 pass
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240
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241
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242 class OldStyleTrackers:
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243 def __init__(self):
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244 self.number = 0
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245 self.trackers = {}
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246
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247 def open(self, tracker_home, optimize=0):
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248 """Open the tracker.
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249
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250 Parameters:
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251 tracker_home:
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252 tracker home directory
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253 optimize:
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254 if set, precompile html templates
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255
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256 Raise ValueError if the tracker home doesn't exist.
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257
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258 """
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259 import imp
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260 # sanity check existence of tracker home
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261 if not os.path.exists(tracker_home):
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262 raise ValueError, 'no such directory: "%s"'%tracker_home
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263
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264 # sanity check tracker home contents
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265 for reqd in 'config dbinit select_db interfaces'.split():
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266 if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
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267 raise TrackerError, 'File "%s.py" missing from tracker '\
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268 'home "%s"'%(reqd, tracker_home)
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269
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270 if self.trackers.has_key(tracker_home):
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271 return imp.load_package(self.trackers[tracker_home],
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272 tracker_home)
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273 # register all available backend modules
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274 backends.list_backends()
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275 self.number = self.number + 1
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276 modname = '_roundup_tracker_%s'%self.number
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277 self.trackers[tracker_home] = modname
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278
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279 # load the tracker
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280 tracker = imp.load_package(modname, tracker_home)
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281
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282 # ensure the tracker has all the required bits
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283 for required in 'open init Client MailGW'.split():
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284 if not hasattr(tracker, required):
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285 raise TrackerError, \
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286 'Required tracker attribute "%s" missing'%required
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287
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288 # load and apply the config
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289 tracker.config = configuration.CoreConfig(tracker_home)
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290 tracker.dbinit.config = tracker.config
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291
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292 tracker.optimize = optimize
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293 tracker.templates = templating.get_loader(tracker.config["TEMPLATES"])
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294 if optimize:
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295 tracker.templates.precompile()
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296
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297 return tracker
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298
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299 OldStyleTrackers = OldStyleTrackers()
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300 def open(tracker_home, optimize=0):
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301 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
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302 # user should upgrade...
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303 return OldStyleTrackers.open(tracker_home, optimize=optimize)
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304
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305 return Tracker(tracker_home, optimize=optimize)
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306
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307 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/