Mercurial > p > roundup > code

annotate roundup/instance.py @ 7303:9bd9d06e2f2c

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Misc doc fixes.
author John Rouillard <rouilj@ieee.org>
date Sun, 07 May 2023 09:28:53 -0400
parents 07ce4e4110f5
children 82bbb95e5690 771d7c43c76f
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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 try:
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37 from collections.abc import Callable
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38 except ImportError:
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39 from collections import Callable
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40
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41 import os
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42 import sys
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43
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44 from roundup import configuration, mailgw
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45 from roundup import hyperdb, backends, actions
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46 from roundup.cgi import client, templating
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47 from roundup.cgi import actions as cgi_actions
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48 from roundup.exceptions import RoundupException
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49
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50
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51 class Tracker:
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52 def __init__(self, tracker_home, optimize=0):
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53 """New-style tracker instance constructor
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54
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55 Parameters:
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56 tracker_home:
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57 tracker home directory
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58 optimize:
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59 if set, precompile html templates
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60
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61 """
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62 self.tracker_home = tracker_home
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63 self.optimize = optimize
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64 # if set, call schema_hook after executing schema.py will get
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65 # same variables (in particular db) as schema.py main purpose is
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66 # for regression tests
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67 self.schema_hook = None
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68 self.config = configuration.CoreConfig(tracker_home)
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69 self.actions = {}
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70 self.cgi_actions = {}
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71 self.templating_utils = {}
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73 libdir = os.path.join(self.tracker_home, 'lib')
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74 self.libdir = os.path.isdir(libdir) and libdir or ''
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75
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76 self.load_interfaces()
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77 self.templates = templating.get_loader(self.config["TEMPLATES"],
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78 self.config["TEMPLATE_ENGINE"])
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79
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80 rdbms_backend = self.config.RDBMS_BACKEND
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81
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82 self.backend = backends.get_backend(rdbms_backend)
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83
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84 if self.optimize:
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85 self.templates.precompile()
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86 # initialize tracker extensions
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87 for extension in self.get_extensions('extensions'):
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88 extension(self)
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89 # load database schema
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90 self.schema = self._compile('schema.py')
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91 # load database detectors
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92 self.detectors = self.get_extensions('detectors')
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93 # db_open is set to True after first open()
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94 self.db_open = 0
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95
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96 def open(self, name=None):
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97 # load the database schema
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98 # we cannot skip this part even if self.optimize is set
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99 # because the schema has security settings that must be
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100 # applied to each database instance
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101 backend = self.backend
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102 env = {
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103 'Class': backend.Class,
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104 'FileClass': backend.FileClass,
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105 'IssueClass': backend.IssueClass,
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106 'String': hyperdb.String,
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107 'Password': hyperdb.Password,
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108 'Date': hyperdb.Date,
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109 'Link': hyperdb.Link,
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110 'Multilink': hyperdb.Multilink,
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111 'Interval': hyperdb.Interval,
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112 'Boolean': hyperdb.Boolean,
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113 'Number': hyperdb.Number,
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114 'Integer': hyperdb.Integer,
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115 'db': backend.Database(self.config, name)
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116 }
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117
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118 if self.optimize:
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119 # execute preloaded schema object
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120 self._exec(self.schema, env)
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121 if isinstance(self.schema_hook, Callable):
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122 self.schema_hook(**env)
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123 # use preloaded detectors
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124 detectors = self.detectors
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125 else:
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126 # execute the schema file
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127 self._execfile('schema.py', env)
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128 if isinstance(self.schema_hook, Callable):
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129 self.schema_hook(**env)
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130 # reload extensions and detectors
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131 for extension in self.get_extensions('extensions'):
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132 extension(self)
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133 detectors = self.get_extensions('detectors')
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134 db = env['db']
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135 db.tx_Source = None
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136 # Useful for script when multiple open calls happen. Scripts have
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137 # to inject the i18n object, there is currently no support for this
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138 if hasattr(self, 'i18n'):
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139 db.i18n = self.i18n
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140
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141 # apply the detectors
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142 for detector in detectors:
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143 detector(db)
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144 # if we are running in debug mode
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145 # or this is the first time the database is opened,
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146 # do database upgrade checks
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147 if not (self.optimize and self.db_open):
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148 # As a consistency check, ensure that every link property is
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149 # pointing at a defined class. Otherwise, the schema is
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150 # internally inconsistent. This is an important safety
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151 # measure as it protects against an accidental schema change
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152 # dropping a table while there are still links to the table;
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153 # once the table has been dropped, there is no way to get it
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154 # back, so it is important to drop it only if we are as sure
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155 # as possible that it is no longer needed.
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156 classes = db.getclasses()
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157 for classname in classes:
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158 cl = db.getclass(classname)
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159 for propname, prop in cl.getprops().items():
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160 if not isinstance(prop, (hyperdb.Link,
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161 hyperdb.Multilink)):
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162 continue
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163 linkto = prop.classname
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164 if linkto not in classes:
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165 raise ValueError("property %s.%s links to "
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166 "non-existent class %s"
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167 % (classname, propname, linkto))
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168
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169 self.db_open = 1
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170 # *Must* call post_init! It is not an error if called multiple times.
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171 db.post_init()
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172 return db
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173
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174 def load_interfaces(self):
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175 """load interfaces.py (if any), initialize Client and MailGW attrs"""
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176 env = {}
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177 if os.path.isfile(os.path.join(self.tracker_home, 'interfaces.py')):
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178 self._execfile('interfaces.py', env)
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179 self.Client = env.get('Client', client.Client)
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180 self.MailGW = env.get('MailGW', mailgw.MailGW)
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181 self.TemplatingUtils = env.get('TemplatingUtils',
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182 templating.TemplatingUtils)
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183
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184 def get_extensions(self, dirname):
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185 """Load python extensions
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186
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187 Parameters:
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188 dirname:
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189 extension directory name relative to tracker home
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190
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191 Return value:
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192 list of init() functions for each extension
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193
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194 """
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195 extensions = []
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196 dirpath = os.path.join(self.tracker_home, dirname)
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197 if os.path.isdir(dirpath):
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198 sys.path.insert(1, dirpath)
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199 for name in os.listdir(dirpath):
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200 if not name.endswith('.py'):
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201 continue
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202 env = {}
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203 self._execfile(os.path.join(dirname, name), env)
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204 extensions.append(env['init'])
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205 sys.path.remove(dirpath)
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206 return extensions
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207
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208 def init(self, adminpw, tx_Source=None):
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209 db = self.open('admin')
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210 db.tx_Source = tx_Source
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211 self._execfile('initial_data.py',
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212 {'db': db, 'adminpw': adminpw,
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213 'admin_email': self.config['ADMIN_EMAIL']})
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214 db.commit()
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215 db.close()
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216
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217 def exists(self):
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218 return self.backend.db_exists(self.config)
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219
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220 def nuke(self):
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221 self.backend.db_nuke(self.config)
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222
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223 def _compile(self, fname):
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224 fname = os.path.join(self.tracker_home, fname)
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225 with builtins.open(fname) as fnamed:
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226 return compile(fnamed.read(), fname, 'exec')
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227
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228 def _exec(self, obj, env):
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229 if self.libdir:
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230 sys.path.insert(1, self.libdir)
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231 exec(obj, env)
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232 if self.libdir:
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233 sys.path.remove(self.libdir)
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234 return env
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235
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236 def _execfile(self, fname, env):
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237 self._exec(self._compile(fname), env)
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238
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239 def registerAction(self, name, action):
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240
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241 # The logic here is this:
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242 # * if `action` derives from actions.Action,
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243 # it is executable as a generic action.
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244 # * if, moreover, it also derives from cgi.actions.Bridge,
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245 # it may in addition be called via CGI
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246 # * in all other cases we register it as a CGI action, without
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247 # any check (for backward compatibility).
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248 if issubclass(action, actions.Action):
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249 self.actions[name] = action
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250 if issubclass(action, cgi_actions.Bridge):
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251 self.cgi_actions[name] = action
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252 else:
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253 self.cgi_actions[name] = action
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254
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255 def registerUtil(self, name, function):
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256 self.templating_utils[name] = function
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257
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258
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259 class TrackerError(RoundupException):
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260 pass
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261
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262
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263 def open(tracker_home, optimize=0):
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264 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
d2801a2b0a77 Initial implementation (half-baked) at new Tracker instance.
Richard Jones <richard@users.sourceforge.net>
parents: 1174
diff changeset
265 # user should upgrade...
6300
778a9f455067 Remove old code import imp, old style trackers db/backend_name
John Rouillard <rouilj@ieee.org>
parents: 6123
diff changeset
266 raise TrackerError("Old style trackers using dbinit.py "
778a9f455067 Remove old code import imp, old style trackers db/backend_name
John Rouillard <rouilj@ieee.org>
parents: 6123
diff changeset
267 "are not supported after release 2.0")
204
c1461733cbf9 Instances are now opened by a special function...
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
268
2851
96626831def1 trackers got a 'templates' attribute, containing html templates collection...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2836
diff changeset
269 return Tracker(tracker_home, optimize=optimize)
204
c1461733cbf9 Instances are now opened by a special function...
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
270
2621
d344419d599d use new style config;
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2584
diff changeset
271 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/