Mercurial > p > roundup > code

annotate roundup/instance.py @ 5505:2ce41b8dffaf

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author Christof Meerwald <cmeerw@cmeerw.org>
date Thu, 16 Aug 2018 21:14:07 +0100
parents 5a871a250670
children 5258e89e896a
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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 try:
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32 import builtins
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33 except ImportError:
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34 import __builtin__ as builtins
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35
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36 import collections
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37 import os
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38 import sys
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39 import warnings
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40
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41 from roundup import configuration, mailgw
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42 from roundup import hyperdb, backends, actions
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43 from roundup.cgi import client, templating
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44 from roundup.cgi import actions as cgi_actions
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45
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46 class Tracker:
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47 def __init__(self, tracker_home, optimize=0):
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48 """New-style tracker instance constructor
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49
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50 Parameters:
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51 tracker_home:
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52 tracker home directory
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53 optimize:
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54 if set, precompile html templates
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55
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56 """
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57 self.tracker_home = tracker_home
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58 self.optimize = optimize
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59 # if set, call schema_hook after executing schema.py will get
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60 # same variables (in particular db) as schema.py main purpose is
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61 # for regression tests
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62 self.schema_hook = None
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63 self.config = configuration.CoreConfig(tracker_home)
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64 self.actions = {}
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65 self.cgi_actions = {}
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66 self.templating_utils = {}
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68 libdir = os.path.join(self.tracker_home, 'lib')
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69 self.libdir = os.path.isdir(libdir) and libdir or ''
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70
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71 self.load_interfaces()
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72 self.templates = templating.get_loader(self.config["TEMPLATES"],
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73 self.config["TEMPLATE_ENGINE"])
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74
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75 rdbms_backend = self.config.RDBMS_BACKEND
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76
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77 # TODO: Remove in v1.7
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78 # Provide some backwards compatability for existing Roundup instances
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79 # that still define the backend type in 'db/backend_name' and warn the
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80 # users they need to update their config.ini
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81 if rdbms_backend == '':
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82 filename = os.path.join(self.config.DATABASE, 'backend_name')
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83 msg = """\n
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84 The 'backend_name' file is no longer used to configure the database backend
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85 used for the tracker. Please read 'doc/upgrading.txt' to find out how to
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86 update your config.ini
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87 """
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88 try:
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89 with open(filename) as backend_file:
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90 rdbms_backend = backend_file.readline().strip()
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91
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92 with warnings.catch_warnings():
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93 warnings.simplefilter("once", DeprecationWarning)
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94 warnings.warn(msg, DeprecationWarning, stacklevel=2)
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95 except IOError:
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96 pass
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97
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98 self.backend = backends.get_backend(rdbms_backend)
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99
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100 if self.optimize:
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101 self.templates.precompile()
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102 # initialize tracker extensions
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103 for extension in self.get_extensions('extensions'):
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104 extension(self)
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105 # load database schema
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106 self.schema = self._compile('schema.py')
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107 # load database detectors
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108 self.detectors = self.get_extensions('detectors')
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109 # db_open is set to True after first open()
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110 self.db_open = 0
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111
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112 def open(self, name=None):
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113 # load the database schema
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114 # we cannot skip this part even if self.optimize is set
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115 # because the schema has security settings that must be
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116 # applied to each database instance
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117 backend = self.backend
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118 env = {
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119 'Class': backend.Class,
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120 'FileClass': backend.FileClass,
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121 'IssueClass': backend.IssueClass,
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122 'String': hyperdb.String,
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123 'Password': hyperdb.Password,
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124 'Date': hyperdb.Date,
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125 'Link': hyperdb.Link,
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126 'Multilink': hyperdb.Multilink,
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127 'Interval': hyperdb.Interval,
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128 'Boolean': hyperdb.Boolean,
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129 'Number': hyperdb.Number,
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130 'Integer': hyperdb.Integer,
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131 'db': backend.Database(self.config, name)
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132 }
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133
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134 if self.optimize:
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135 # execute preloaded schema object
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136 self._exec(self.schema, env)
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137 if isinstance(self.schema_hook, collections.Callable):
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138 self.schema_hook(**env)
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139 # use preloaded detectors
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140 detectors = self.detectors
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141 else:
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142 # execute the schema file
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143 self._execfile('schema.py', env)
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144 if isinstance(self.schema_hook, collections.Callable):
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145 self.schema_hook(**env)
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146 # reload extensions and detectors
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147 for extension in self.get_extensions('extensions'):
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148 extension(self)
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149 detectors = self.get_extensions('detectors')
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150 db = env['db']
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151 db.tx_Source = None
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152
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153 # apply the detectors
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154 for detector in detectors:
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155 detector(db)
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156 # if we are running in debug mode
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157 # or this is the first time the database is opened,
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158 # do database upgrade checks
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159 if not (self.optimize and self.db_open):
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160 # As a consistency check, ensure that every link property is
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161 # pointing at a defined class. Otherwise, the schema is
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162 # internally inconsistent. This is an important safety
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163 # measure as it protects against an accidental schema change
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164 # dropping a table while there are still links to the table;
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165 # once the table has been dropped, there is no way to get it
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166 # back, so it is important to drop it only if we are as sure
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167 # as possible that it is no longer needed.
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168 classes = db.getclasses()
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169 for classname in classes:
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170 cl = db.getclass(classname)
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171 for propname, prop in cl.getprops().items():
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172 if not isinstance(prop, (hyperdb.Link,
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173 hyperdb.Multilink)):
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174 continue
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175 linkto = prop.classname
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176 if linkto not in classes:
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177 raise ValueError("property %s.%s links to non-existent class %s"
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178 % (classname, propname, linkto))
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179
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180 db.post_init()
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181 self.db_open = 1
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182 return db
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183
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184 def load_interfaces(self):
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185 """load interfaces.py (if any), initialize Client and MailGW attrs"""
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186 env = {}
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187 if os.path.isfile(os.path.join(self.tracker_home, 'interfaces.py')):
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188 self._execfile('interfaces.py', env)
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189 self.Client = env.get('Client', client.Client)
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190 self.MailGW = env.get('MailGW', mailgw.MailGW)
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191 self.TemplatingUtils = env.get('TemplatingUtils', templating.TemplatingUtils)
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192
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193 def get_extensions(self, dirname):
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194 """Load python extensions
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195
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196 Parameters:
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197 dirname:
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198 extension directory name relative to tracker home
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199
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200 Return value:
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diff changeset
201 list of init() functions for each extension
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202
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203 """
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204 extensions = []
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205 dirpath = os.path.join(self.tracker_home, dirname)
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206 if os.path.isdir(dirpath):
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207 sys.path.insert(1, dirpath)
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208 for name in os.listdir(dirpath):
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209 if not name.endswith('.py'):
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diff changeset
210 continue
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211 env = {}
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212 self._execfile(os.path.join(dirname, name), env)
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213 extensions.append(env['init'])
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214 sys.path.remove(dirpath)
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215 return extensions
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diff changeset
216
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217 def init(self, adminpw, tx_Source=None):
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218 db = self.open('admin')
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219 db.tx_Source = tx_Source
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220 self._execfile('initial_data.py', {'db': db, 'adminpw': adminpw,
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221 'admin_email': self.config['ADMIN_EMAIL']})
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222 db.commit()
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223 db.close()
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224
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225 def exists(self):
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226 return self.backend.db_exists(self.config)
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227
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228 def nuke(self):
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229 self.backend.db_nuke(self.config)
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230
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231 def _compile(self, fname):
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232 fname = os.path.join(self.tracker_home, fname)
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233 return compile(builtins.open(fname).read(), fname, 'exec')
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234
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235 def _exec(self, obj, env):
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236 if self.libdir:
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237 sys.path.insert(1, self.libdir)
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238 exec(obj, env)
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239 if self.libdir:
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240 sys.path.remove(self.libdir)
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241 return env
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242
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243 def _execfile(self, fname, env):
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244 self._exec(self._compile(fname), env)
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245
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246 def registerAction(self, name, action):
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247
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248 # The logic here is this:
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249 # * if `action` derives from actions.Action,
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250 # it is executable as a generic action.
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251 # * if, moreover, it also derives from cgi.actions.Bridge,
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252 # it may in addition be called via CGI
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253 # * in all other cases we register it as a CGI action, without
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254 # any check (for backward compatibility).
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255 if issubclass(action, actions.Action):
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256 self.actions[name] = action
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257 if issubclass(action, cgi_actions.Bridge):
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258 self.cgi_actions[name] = action
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259 else:
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260 self.cgi_actions[name] = action
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261
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262 def registerUtil(self, name, function):
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263 self.templating_utils[name] = function
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264
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265 class TrackerError(BaseException):
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266 pass
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267
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268
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269 class OldStyleTrackers:
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270 def __init__(self):
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271 self.number = 0
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272 self.trackers = {}
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273
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274 def open(self, tracker_home, optimize=0):
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275 """Open the tracker.
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276
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277 Parameters:
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278 tracker_home:
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279 tracker home directory
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280 optimize:
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281 if set, precompile html templates
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282
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283 Raise ValueError if the tracker home doesn't exist.
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284
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285 """
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286 import imp
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287 # sanity check existence of tracker home
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288 if not os.path.exists(tracker_home):
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289 raise ValueError('no such directory: "%s"'%tracker_home)
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290
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291 # sanity check tracker home contents
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292 for reqd in 'config dbinit select_db interfaces'.split():
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293 if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
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294 raise TrackerError('File "%s.py" missing from tracker '\
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295 'home "%s"'%(reqd, tracker_home))
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296
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297 if tracker_home in self.trackers:
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298 return imp.load_package(self.trackers[tracker_home],
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299 tracker_home)
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300 # register all available backend modules
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301 backends.list_backends()
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302 self.number = self.number + 1
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303 modname = '_roundup_tracker_%s'%self.number
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304 self.trackers[tracker_home] = modname
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305
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306 # load the tracker
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307 tracker = imp.load_package(modname, tracker_home)
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308
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309 # ensure the tracker has all the required bits
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310 for required in 'open init Client MailGW'.split():
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311 if not hasattr(tracker, required):
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312 raise TrackerError('Required tracker attribute "%s" missing'%required)
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313
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314 # load and apply the config
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315 tracker.config = configuration.CoreConfig(tracker_home)
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316 tracker.dbinit.config = tracker.config
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317
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318 tracker.optimize = optimize
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319 tracker.templates = templating.get_loader(tracker.config["TEMPLATES"])
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320 if optimize:
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321 tracker.templates.precompile()
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322
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323 return tracker
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324
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325 OldStyleTrackers = OldStyleTrackers()
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326 def open(tracker_home, optimize=0):
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327 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
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328 # user should upgrade...
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329 return OldStyleTrackers.open(tracker_home, optimize=optimize)
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330
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331 return Tracker(tracker_home, optimize=optimize)
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332
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333 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/