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annotate src/bridge/bridge_contructor.py @ 265:b5f1f3dc9ac6

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bridge: automatic bridge generator, first draft
author Goffi <goffi@goffi.org>
date Mon, 24 Jan 2011 01:22:00 +0100
parents
children c4b84a2d2ad1
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265
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1 #!/usr/bin/python
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2 #-*- coding: utf-8 -*-
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3
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4 """
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5 SAT: a jabber client
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6 Copyright (C) 2009, 2010, 2011 Jérôme Poisson (goffi@goffi.org)
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7
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8 This program is free software: you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation, either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 """
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21
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22
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23 #consts
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24 NAME = u"bridge_constructor"
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25 VERSION="0.1.0"
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26 ABOUT = NAME+u""" v%s (c) Jérôme Poisson (aka Goffi) 2011
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27
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28 ---
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29 """+NAME+u""" Copyright (C) 2011 Jérôme Poisson (aka Goffi)
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30 This program comes with ABSOLUTELY NO WARRANTY;
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31 This is free software, and you are welcome to redistribute it
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32 under certain conditions.
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33 ---
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34
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35 This script construct a SàT bridge using the given protocol
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36 """
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37 MANAGED_PROTOCOLES=['dbus']
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38 DEFAULT_PROTOCOLE='dbus'
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39
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40 import sys
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41 import os
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42 from os import path
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43 from optparse import OptionParser
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44 from ConfigParser import RawConfigParser as Parser
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45 from ConfigParser import NoOptionError
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46
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47
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48 class ParseError(Exception):
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49 #Used when the signature parsing is going wrong (invalid signature ?)
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50 pass
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51
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52 class Constructor:
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53
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54 def __init__(self, bridge_template, options):
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55 self.bridge_template = bridge_template
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56 self.options = options
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57
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58 def getValues(self, name):
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59 """Return values of a function in a dict
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60 @param name: Name of the function to get
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61 @return: dict, each key has the config value or None if the value is not set"""
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62 function={}
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63 for option in ['type','category','sig_in','sig_out','doc']:
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64 try:
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65 value = self.bridge_template.get(name, option)
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66 except NoOptionError:
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67 value = None
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68 function[option] = value
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69 return function
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70
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71 def getArguments(self, signature):
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72 """Return arguments to user given a signature
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73 @param signature: signature in the short form (using s,a,i,b etc)
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74 @return: list of arguments that correspond to a signature (e.g.: "sss" return "arg1, arg2, arg3")"""
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75 i=0
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76 idx=0
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77 attr_string=""
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78 while i<len(signature):
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79 if signature[i] not in ['b','y','n','i','x','q','u','t','d','s','a']:
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80 raise ParseError("Unmanaged attribute type [%c]" % signature[i])
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81
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82 attr_string += ("" if idx==0 else ", ") + ("arg_%i" % idx)
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83 idx+=1
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84
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85 if signature[i] == 'a':
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86 i+=1
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87 if signature[i]!='{' and signature[i]!='(': #FIXME: must manage tuples out of arrays
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88 i+=1
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89 continue #we have a simple type for the array
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90 opening_car = signature[i]
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91 closing_car = '}' if opening_car == '{' else ')'
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92 opening_count = 1
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93 while (True): #we have a dict or a list of tuples
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94 i+=1
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95 if i>=len(signature):
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96 raise ParseError("missing }")
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97 if signature[i] == opening_car:
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98 opening_count+=1
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99 if signature[i] == closing_car:
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100 opening_count-=1
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101 if opening_count == 0:
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102 break
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103 i+=1
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104 return attr_string
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105
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106 def generateCoreSide(self):
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107 """create the constructor in SàT core side (backend)"""
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108 raise NotImplementedError
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109
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110 class DbusConstructor(Constructor):
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111
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112 def __init__(self, bridge_template, options):
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113 Constructor.__init__(self, bridge_template, options)
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114 self.core_template="dbus_core_template.py"
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115 self.core_dest="DBus.py"
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116
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117 def generateCoreSide(self):
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118 signals_part = []
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119 methods_part = []
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120 direct_calls = []
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121 sections = self.bridge_template.sections()
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122 sections.sort()
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123 for section in sections:
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124 function = self.getValues(section)
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125 print ("Adding %s %s" % (section, function["type"]))
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126 completion = {
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127 'sig_in':function['sig_in'] or '',
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128 'sig_out':function['sig_out'] or '',
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129 'category':'REQ' if function['category'] == 'request' else 'COMM',
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130 'name':section,
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131 'args':self.getArguments(function['sig_in'])
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132 }
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133
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134 if function["type"] == "signal":
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135 completion['body'] = "pass" if not self.options.debug else 'debug ("%s")' % section
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136 signals_part.append("""\
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137 @dbus.service.signal(const_INT_PREFIX+const_%(category)s_SUFFIX,
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138 signature='%(sig_in)s')
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139 def %(name)s(self, %(args)s):
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140 %(body)s
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141 """ % completion)
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142 direct_calls.append("""\
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143 def %(name)s(self, %(args)s):
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144 self.dbus_bridge.%(name)s(%(args)s)
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145 """ % completion)
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146
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147 elif function["type"] == "method":
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148 completion['debug'] = "" if not self.options.debug else 'debug ("%s")\n%s' % (section,8*' ')
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149 methods_part.append("""\
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150 @dbus.service.method(const_INT_PREFIX+const_%(category)s_SUFFIX,
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151 in_signature='%(sig_in)s', out_signature='%(sig_out)s')
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152 def %(name)s(self, %(args)s):
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153 %(debug)sreturn self.cb["%(name)s"](%(args)s)
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154 """ % completion)
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155
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156 #at this point, signals_part, methods_part and direct_calls should be filled,
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157 #we just have to place them in the right part of the template
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158 core_bridge = []
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159 try:
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160 with open(self.core_template) as core_template:
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161 for line in core_template:
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162 if line.startswith('##SIGNALS_PART##'):
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163 core_bridge.extend(signals_part)
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164 elif line.startswith('##METHODS_PART##'):
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165 core_bridge.extend(methods_part)
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166 elif line.startswith('##DIRECT_CALLS##'):
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167 core_bridge.extend(direct_calls)
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168 else:
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169 core_bridge.append(line.replace('\n',''))
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170 except IOError:
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171 print ("Can't open template file [%s]" % self.core_template)
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172 sys.exit(1)
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173
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174 #now we write to final file
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175 if os.path.exists(self.core_dest) and not self.options.force:
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176 print ("The destination file [%s] already exists ! Use --force to overwrite it" % self.core_dest)
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177 try:
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178 with open(self.core_dest,'w') as dest_file:
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179 dest_file.write('\n'.join(core_bridge))
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180 except IOError:
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parents:
diff changeset
181 print ("Can't open destination file [%s]" % self.dest_file)
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parents:
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182
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183 class ConstructorError(Exception):
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184 pass
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185
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186 class ConstructorFactory:
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187 def create(self, bridge_template, options):
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parents:
diff changeset
188 if options.protocole=='dbus':
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189 return DbusConstructor(bridge_template, options)
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Goffi <goffi@goffi.org>
parents:
diff changeset
190
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parents:
diff changeset
191 raise ConstructorError('Unknown constructor type')
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parents:
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192
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193 class BridgeConstructor:
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194 def __init__(self):
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195 self.options = None
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196
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diff changeset
197 def check_options(self):
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diff changeset
198 """Check command line options"""
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199 _usage="""
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diff changeset
200 %prog [options]
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parents:
diff changeset
201
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Goffi <goffi@goffi.org>
parents:
diff changeset
202 %prog --help for options list
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Goffi <goffi@goffi.org>
parents:
diff changeset
203 """
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Goffi <goffi@goffi.org>
parents:
diff changeset
204 parser = OptionParser(usage=_usage,version=ABOUT % VERSION)
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Goffi <goffi@goffi.org>
parents:
diff changeset
205
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Goffi <goffi@goffi.org>
parents:
diff changeset
206 parser.add_option("-p", "--protocole", action="store", type="string", default=DEFAULT_PROTOCOLE,
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parents:
diff changeset
207 help="Generate bridge using PROTOCOLE (default: %s, possible values: [%s])" % (DEFAULT_PROTOCOLE, ", ".join(MANAGED_PROTOCOLES)))
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parents:
diff changeset
208 parser.add_option("-s", "--side", action="store", type="string", default="core",
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parents:
diff changeset
209 help="Which side of the bridge do you want to make ? (default: %default, possible values: [core, frontend])")
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Goffi <goffi@goffi.org>
parents:
diff changeset
210 parser.add_option("-t", "--template", action="store", type="string", default='bridge_template.ini',
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Goffi <goffi@goffi.org>
parents:
diff changeset
211 help="Use TEMPLATE to generate bridge (default: %default)")
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Goffi <goffi@goffi.org>
parents:
diff changeset
212 parser.add_option("-f", "--force", action="store_true", default=False,
b5f1f3dc9ac6 bridge: automatic bridge generator, first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
213 help=("Force overwritting of existing files"))
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parents:
diff changeset
214 parser.add_option("-d", "--debug", action="store_true", default=False,
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Goffi <goffi@goffi.org>
parents:
diff changeset
215 help=("Add debug information printing"))
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Goffi <goffi@goffi.org>
parents:
diff changeset
216
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diff changeset
217 (self.options, args) = parser.parse_args()
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diff changeset
218 return args
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parents:
diff changeset
219
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Goffi <goffi@goffi.org>
parents:
diff changeset
220 def go(self):
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Goffi <goffi@goffi.org>
parents:
diff changeset
221 self.check_options()
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Goffi <goffi@goffi.org>
parents:
diff changeset
222 self.template = Parser()
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Goffi <goffi@goffi.org>
parents:
diff changeset
223 try:
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Goffi <goffi@goffi.org>
parents:
diff changeset
224 self.template.readfp(open(self.options.template))
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Goffi <goffi@goffi.org>
parents:
diff changeset
225 except IOError:
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Goffi <goffi@goffi.org>
parents:
diff changeset
226 print ("The template file doesn't exist or is not accessible")
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Goffi <goffi@goffi.org>
parents:
diff changeset
227 exit(1)
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Goffi <goffi@goffi.org>
parents:
diff changeset
228 constructor = ConstructorFactory().create(self.template, self.options)
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Goffi <goffi@goffi.org>
parents:
diff changeset
229 if self.options.side == "core":
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Goffi <goffi@goffi.org>
parents:
diff changeset
230 constructor.generateCoreSide()
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Goffi <goffi@goffi.org>
parents:
diff changeset
231
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Goffi <goffi@goffi.org>
parents:
diff changeset
232 if __name__ == "__main__":
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Goffi <goffi@goffi.org>
parents:
diff changeset
233 bc = BridgeConstructor()
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Goffi <goffi@goffi.org>
parents:
diff changeset
234 bc.go()