Mercurial > p > roundup > code

annotate roundup/config.py @ 482:fdee2ff82b40 config-0-4-0-branch

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Miscellaneous improvements * Altered function names in roundup.config to bE NeAtEr rather_than_ugly; * Created some extra roundup.config exceptions to let people know what's going on; * Modified instance_config.py to use those exceptions, so that syntax errors or other exceptions did *not* trigger the same behavior as import while in the templates/ directory. * Modified roundup.cgi to use the same neater function names, plus did some minor cleanup.
author Titus Brown <titus@users.sourceforge.net>
date Thu, 03 Jan 2002 08:28:17 +0000
parents a261b0bbba43
children 13719594278b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import sys
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2 import os
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3 import ConfigParser
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4 import string
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5
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6 class Error(Exception):
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7 pass
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8
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9 class UnknownInstanceLocation(Error):
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10 pass
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11
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12 class NoInstanceConfigFile(Error):
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13 pass
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14
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15 def debug_mode():
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16 """
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17 Returns the basic debug mode/level.
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18 """
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19 return os.environ.get('ROUNDUP_DEBUG', 0)
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20
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21 def loadBaseConfig():
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22 """
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23 Loads the base configuration for Roundup.
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24 """
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25
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26 c = ConfigParser.ConfigParser()
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27
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28 ##
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29 ## CTB: this is where to search for all overrides, including
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30 ## system-specific files, registry settings, etc.
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31 ##
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32
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33 # For the moment, search for the config file in
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34 #
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35 # %(sys.prefix)s/share/roundup/roundup.rc,
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36 #
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37 # with ROUNDUP_CONF overriding it.
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38
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39 filenames_to_check = [] # list of files to check:
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40 if os.environ.has_key('ROUNDUP_CONF'):
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41 filenames_to_check.append(os.environ['ROUNDUP_CONF'])
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42
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43 filenames_to_check.append('%s/share/roundup/roundup.rc'%(sys.prefix,))
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44
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45 for filename in filenames_to_check:
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46 if os.path.exists(filename):
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47 c.read(filename)
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48 break
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49 else:
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50 raise Error("could not find configuration file")
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51
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52 if debug_mode():
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53 print 'Loaded configuration from "%s".'%(filename,)
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54
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55 # we also want to give a base path for other config file names;
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56 # for the moment, make it the base path of the filename we chose.
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57 base_path = os.path.dirname(filename)
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58
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59 return BaseConfig(c, base_path)
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60
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61 class BaseConfig:
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62 """
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63 A container for the installation-wide roundup configuration.
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64 """
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65 def __init__(self, c, base_path):
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66 assert isinstance(c, ConfigParser.ConfigParser)
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67 self.conf = c
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68 self.base_path = base_path
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69
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70 def get(self, group, attr):
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71 return self.conf.get(group, attr)
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72
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73 def loadInstances(self):
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74 filename = string.strip(self.conf.get('base', 'instances'))
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75
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76 # if it looks like an absolute path, leave it alone; otherwise,
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77 # add on the base path.
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78 if filename[0] == '/' or filename[0] == '\\':
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79 pass
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80 else:
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81 filename = os.path.normpath(self.base_path + '/' + filename)
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82
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83 defaults_dictionary = { 'roundup_conf_dir' : self.base_path }
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84
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85 c = ConfigParser.ConfigParser(defaults_dictionary)
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86 c.read(filename)
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87
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88 return InstancesConfig(c, filename)
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89
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90 class InstancesConfig:
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91 """
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92 A container for the installation-wide list of instances.
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93 """
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94 def __init__(self, c, filename=""):
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95 assert isinstance(c, ConfigParser.ConfigParser)
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96 self.conf = c
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97 self.filename = filename
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98
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99 instance_names = {}
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100 instance_dirs = {}
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101
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102 for name in c.sections():
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103 dir = c.get(name, 'homedir')
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104
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105 if instance_names.has_key(dir) or instance_dirs.has_key(name):
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106 error_text = 'ERROR: dir/name correspondence is not unique (%s)'%(self.filename,)
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107 raise ValueError(error_text)
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108
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109 instance_dirs[name] = dir
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110 instance_names[dir] = name
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111
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112 self.instance_dirs = instance_dirs
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113 self.instance_names = instance_names
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114
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115 def getNames(self):
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116 return self.instance_dirs.keys()
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117
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118 def getNameFromDir(self, dir):
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119 if self.instance_names.has_key(dir):
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120 return self.instance_names[dir]
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121 else:
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122 raise UnknownInstanceLocation(dir)
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123
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124 def getDirFromName(self, name):
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125 return self.instance_dirs[name]
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126
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127 def loadConfig(self, name):
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128 instance_dir = self.getDirFromName(name)
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129
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130 defaults_file = self.conf.get(name, 'defaults')
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131 if not os.path.exists(defaults_file):
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132 raise NoInstanceConfigFile("defaults file %s does not exist"%(defaults_file,))
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133
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134 config_file = self.conf.get(name, 'config')
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135 if not os.path.exists(config_file):
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136 raise NoInstanceConfigFile("%s does not exist"%(config_file,))
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137
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138 defaults_dictionary = { 'homedir' : instance_dir,
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139 'instance_name' : name,
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140 }
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141
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142
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143 c = ConfigParser.ConfigParser(defaults_dictionary)
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144 c.read(defaults_file)
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145 c.read(config_file)
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146
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147 return InstanceConfig(c, name, instance_dir)
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148
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149 class InstanceConfig:
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150 """
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151 A container for each per-instance configuration.
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152 """
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153
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154 def __init__(self, c, instanceName, instanceDirectory):
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155 assert isinstance(c, ConfigParser.ConfigParser)
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156 self.conf = c
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157 self.name = instanceName
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158 self.directory = instanceDirectory
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159
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160 def get_name(self):
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161 return self.name
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162
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163 def get_directory(self):
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164 return self.directory
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165
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166 def get(self, group, attr):
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167 return self.conf.get(group, attr)
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168
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169 if __name__ == '__main__':
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170 base_config = loadBaseConfig()
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171 instances = base_config.loadInstances()
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172
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173 for k in instances.getNames():
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174 print "%s:%s"%(k, instances.getDirFromName(k),)
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