Mercurial > libervia-backend
annotate src/bridge/bridge_constructor/bridge_contructor.py @ 284:c25371424090
dbus bridge: fixed introspection for dynamically added methods and signals
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Fri, 04 Feb 2011 00:13:41 +0100 |
| parents | a00e87d48213 |
| children | 4402ac630712 |
| rev | line source |
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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 DEST_DIR="generated" |
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27 ABOUT = NAME+u""" v%s (c) Jérôme Poisson (aka Goffi) 2011 |
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28 |
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29 --- |
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30 """+NAME+u""" Copyright (C) 2011 Jérôme Poisson (aka Goffi) |
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31 This program comes with ABSOLUTELY NO WARRANTY; |
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32 This is free software, and you are welcome to redistribute it |
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33 under certain conditions. |
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34 --- |
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35 |
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36 This script construct a SàT bridge using the given protocol |
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37 """ |
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38 MANAGED_PROTOCOLES=['dbus','mediawiki'] |
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39 DEFAULT_PROTOCOLE='dbus' |
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40 FLAGS=['deprecated'] |
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41 |
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42 import sys |
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43 import os |
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44 from os import path |
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45 from optparse import OptionParser |
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46 from ConfigParser import SafeConfigParser as Parser |
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47 from ConfigParser import NoOptionError |
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48 import re |
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49 from datetime import datetime |
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50 |
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51 |
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52 class ParseError(Exception): |
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53 #Used when the signature parsing is going wrong (invalid signature ?) |
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54 pass |
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55 |
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56 class Constructor: |
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57 |
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58 def __init__(self, bridge_template, options): |
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59 self.bridge_template = bridge_template |
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60 self.options = options |
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61 |
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62 def getValues(self, name): |
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63 """Return values of a function in a dict |
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64 @param name: Name of the function to get |
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65 @return: dict, each key has the config value or None if the value is not set""" |
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66 function={} |
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67 for option in ['type','category','sig_in','sig_out','doc']: |
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68 try: |
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69 value = self.bridge_template.get(name, option) |
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70 except NoOptionError: |
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71 value = None |
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72 function[option] = value |
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73 return function |
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74 |
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75 def getDefault(self, name): |
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76 """Return default values of a function in a dict |
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77 @param name: Name of the function to get |
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78 @return: dict, each key is the integer param number (no key if no default value)""" |
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79 default_dict={} |
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80 def_re = re.compile(r"param_(\d+)_default") |
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81 |
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82 for option in self.bridge_template.options(name): |
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83 match = def_re.match(option) |
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84 if match: |
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85 try: |
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86 idx = int(match.group(1)) |
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87 except ValueError: |
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88 raise ParseError("Invalid value [%s] for parameter number" % match.group(1)) |
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89 default_dict[idx] = self.bridge_template.get(name, option) |
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90 |
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91 return default_dict |
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92 |
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93 def getFlags(self, name): |
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94 """Return list of flags set for this function |
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95 @param name: Name of the function to get |
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96 @return: List of flags (string)""" |
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97 flags=[] |
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98 for option in self.bridge_template.options(name): |
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99 if option in FLAGS: |
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100 flags.append(option) |
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101 return flags |
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102 |
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103 def getArgumentsDoc(self, name): |
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104 """Return documentation of arguments |
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105 @param name: Name of the function to get |
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106 @return: dict, each key is the integer param number (no key if no argument doc), value is a tuple (name, doc)""" |
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107 doc_dict={} |
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108 option_re = re.compile(r"doc_param_(\d+)") |
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109 value_re = re.compile(r"^(\w+): (.*)$", re.MULTILINE | re.DOTALL) |
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110 for option in self.bridge_template.options(name): |
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111 if option == 'doc_return': |
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112 doc_dict['return'] = self.bridge_template.get(name, option) |
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113 continue |
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114 match = option_re.match(option) |
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115 if match: |
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116 try: |
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117 idx = int(match.group(1)) |
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118 except ValueError: |
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119 raise ParseError("Invalid value [%s] for parameter number" % match.group(1)) |
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120 value_match = value_re.match(self.bridge_template.get(name, option)) |
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121 if not value_match: |
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122 raise ParseError("Invalid value for parameter doc [%i]" % idx) |
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123 doc_dict[idx]=(value_match.group(1),value_match.group(2)) |
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124 return doc_dict |
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125 |
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126 def getDoc(self, name): |
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127 """Return documentation of the method |
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128 @param name: Name of the function to get |
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129 @return: string documentation, or None""" |
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130 if self.bridge_template.has_option(name, "doc"): |
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131 return self.bridge_template.get(name, "doc") |
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132 return None |
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133 |
| 267 | 134 def getArguments(self, signature, name=None, default=None, unicode_protect=False): |
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135 """Return arguments to user given a signature |
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136 @param signature: signature in the short form (using s,a,i,b etc) |
| 267 | 137 @param name: dictionary of arguments name like given by getArguments |
| 138 @param default: dictionary of default values, like given by getDefault | |
| 139 @param unicode_protect: activate unicode protection on strings (return strings as unicode(str)) | |
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140 @return: list of arguments that correspond to a signature (e.g.: "sss" return "arg1, arg2, arg3")""" |
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141 i=0 |
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142 idx=0 |
| 267 | 143 attr_string=[] |
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144 while i<len(signature): |
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145 if signature[i] not in ['b','y','n','i','x','q','u','t','d','s','a']: |
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146 raise ParseError("Unmanaged attribute type [%c]" % signature[i]) |
| 267 | 147 |
| 148 attr_string.append(("unicode(%(name)s)%(default)s" if (unicode_protect and signature[i]=='s') else "%(name)s%(default)s") % { | |
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149 'name':name[idx][0] if (name and name.has_key(idx)) else "arg_%i" % idx, |
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150 'default':"="+default[idx] if (default and default.has_key(idx)) else '' |
| 267 | 151 }) #give arg_1, arg2, etc or name1, name2=default, etc. \ |
| 152 #give unicode(arg_1), unicode(arg_2), etc. if unicode_protect is set and arg is a string | |
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153 idx+=1 |
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154 |
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155 if signature[i] == 'a': |
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156 i+=1 |
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157 if signature[i]!='{' and signature[i]!='(': #FIXME: must manage tuples out of arrays |
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158 i+=1 |
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159 continue #we have a simple type for the array |
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160 opening_car = signature[i] |
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161 assert(opening_car in ['{','(']) |
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162 closing_car = '}' if opening_car == '{' else ')' |
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163 opening_count = 1 |
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164 while (True): #we have a dict or a list of tuples |
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165 i+=1 |
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166 if i>=len(signature): |
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167 raise ParseError("missing }") |
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168 if signature[i] == opening_car: |
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169 opening_count+=1 |
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170 if signature[i] == closing_car: |
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171 opening_count-=1 |
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172 if opening_count == 0: |
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173 break |
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174 i+=1 |
| 267 | 175 return ", ".join(attr_string) |
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176 |
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177 def generateCoreSide(self): |
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178 """create the constructor in SàT core side (backend)""" |
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179 raise NotImplementedError |
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180 |
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181 def generateFrontendSide(self): |
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182 """create the constructor in SàT frontend side""" |
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183 raise NotImplementedError |
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184 |
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185 def finalWrite(self, filename, file_buf): |
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186 """Write the final generated file in DEST_DIR/filename |
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187 @param filename: name of the file to generate |
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188 @param file_buf: list of lines (stings) of the file""" |
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189 if os.path.exists(DEST_DIR) and not os.path.isdir(DEST_DIR): |
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190 print ("The destination dir [%s] can't be created: a file with this name already exists !") |
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191 sys.exit(1) |
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192 try: |
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193 if not os.path.exists(DEST_DIR): |
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194 os.mkdir(DEST_DIR) |
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195 full_path=os.path.join(DEST_DIR,filename) |
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196 if os.path.exists(full_path) and not self.options.force: |
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197 print ("The destination file [%s] already exists ! Use --force to overwrite it" % full_path) |
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198 try: |
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199 with open(full_path,'w') as dest_file: |
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200 dest_file.write('\n'.join(file_buf)) |
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201 except IOError: |
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202 print ("Can't open destination file [%s]" % full_path) |
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203 except OSError: |
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204 print("It's not possible to generate the file, check your permissions") |
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205 exit(1) |
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206 |
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207 class MediawikiConstructor(Constructor): |
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208 |
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209 def __init__(self, bridge_template, options): |
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210 Constructor.__init__(self, bridge_template, options) |
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211 self.core_template="mediawiki_template.tpl" |
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212 self.core_dest="mediawiki.wiki" |
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213 |
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214 def _wikiParameter(self, name, sig_in): |
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215 """Format parameters with the wiki syntax |
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216 @param name: name of the function |
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217 @param sig_in: signature in |
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218 @return: string of the formated parameters""" |
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219 arg_doc = self.getArgumentsDoc(name) |
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220 arg_default = self.getDefault(name) |
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221 args_str = self.getArguments(sig_in) |
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222 args = args_str.split(', ') if args_str else [] #ugly but it works :) |
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223 wiki=[] |
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224 for i in range(len(args)): |
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225 if arg_doc.has_key(i): |
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226 name,doc=arg_doc[i] |
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227 doc='\n:'.join(doc.rstrip('\n').split('\n')) |
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228 wiki.append("; %s: %s" % (name, doc)) |
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229 else: |
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230 wiki.append("; arg_%d: " % i) |
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231 if arg_default.has_key(i): |
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232 wiki.append(":''DEFAULT: %s''" % arg_default[i]) |
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233 return "\n".join(wiki) |
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234 |
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235 def _wikiReturn(self, name): |
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236 """Format return doc with the wiki syntax |
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237 @param name: name of the function |
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238 """ |
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239 arg_doc = self.getArgumentsDoc(name) |
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240 wiki=[] |
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241 if arg_doc.has_key('return'): |
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242 wiki.append('\n|-\n! scope=row | return value\n|') |
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243 wiki.append('<br />\n'.join(arg_doc['return'].rstrip('\n').split('\n'))) |
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244 return "\n".join(wiki) |
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245 |
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246 def generateCoreSide(self): |
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247 signals_part = [] |
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248 methods_part = [] |
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249 sections = self.bridge_template.sections() |
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250 sections.sort() |
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251 for section in sections: |
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252 function = self.getValues(section) |
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253 print ("Adding %s %s" % (section, function["type"])) |
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254 default = self.getDefault(section) |
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255 deprecated_msg = """<br />'''<font color="#FF0000">/!\ WARNING /!\ : This method is deprecated, please don't use it !</font>'''""" |
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256 signature_signal = \ |
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257 """\ |
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258 ! scope=row | signature |
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259 | %s |
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260 |-\ |
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261 """ % function['sig_in'] |
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262 signature_method = \ |
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263 """\ |
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264 ! scope=row | signature in |
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265 | %s |
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266 |- |
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267 ! scope=row | signature out |
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268 | %s |
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269 |-\ |
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270 """ % (function['sig_in'], function['sig_out']) |
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271 completion = { |
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272 'signature':signature_signal if function['type']=="signal" else signature_method, |
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273 'sig_out':function['sig_out'] or '', |
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274 'category':function['category'], |
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275 'name':section, |
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276 'doc':self.getDoc(section) or "FIXME: No description available", |
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277 'deprecated':deprecated_msg if "deprecated" in self.getFlags(section) else "", |
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278 'parameters':self._wikiParameter(section, function['sig_in']), |
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279 'return':self._wikiReturn(section) if function['type'] == 'method' else '' |
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280 } |
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281 |
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282 dest = signals_part if function['type'] == "signal" else methods_part |
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283 dest.append("""\ |
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284 == %(name)s == |
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285 ''%(doc)s'' |
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286 %(deprecated)s |
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287 {| class="wikitable" style="text-align:left; width:80%%;" |
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288 ! scope=row | category |
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289 | %(category)s |
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290 |- |
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291 %(signature)s |
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292 ! scope=row | parameters |
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293 | |
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294 %(parameters)s%(return)s |
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295 |} |
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296 """ % completion) |
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297 |
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298 #at this point, signals_part, and methods_part should be filled, |
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299 #we just have to place them in the right part of the template |
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300 core_bridge = [] |
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301 try: |
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302 with open(self.core_template) as core_template: |
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303 for line in core_template: |
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304 if line.startswith('##SIGNALS_PART##'): |
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305 core_bridge.extend(signals_part) |
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306 elif line.startswith('##METHODS_PART##'): |
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307 core_bridge.extend(methods_part) |
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308 elif line.startswith('##TIMESTAMP##'): |
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309 core_bridge.append('Generated on %s' % datetime.now()) |
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310 else: |
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311 core_bridge.append(line.replace('\n','')) |
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312 except IOError: |
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313 print ("Can't open template file [%s]" % self.core_template) |
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314 sys.exit(1) |
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315 |
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316 #now we write to final file |
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317 self.finalWrite(self.core_dest, core_bridge) |
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318 |
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319 class DbusConstructor(Constructor): |
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320 |
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321 def __init__(self, bridge_template, options): |
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322 Constructor.__init__(self, bridge_template, options) |
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323 self.core_template="dbus_core_template.py" |
| 267 | 324 self.frontend_template="dbus_frontend_template.py" |
| 325 self.frontend_dest = self.core_dest="DBus.py" | |
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326 |
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327 def generateCoreSide(self): |
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328 signals_part = [] |
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329 methods_part = [] |
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330 direct_calls = [] |
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331 sections = self.bridge_template.sections() |
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332 sections.sort() |
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333 for section in sections: |
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334 function = self.getValues(section) |
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335 print ("Adding %s %s" % (section, function["type"])) |
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266
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336 default = self.getDefault(section) |
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337 arg_doc = self.getArgumentsDoc(section) |
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338 completion = { |
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339 'sig_in':function['sig_in'] or '', |
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340 'sig_out':function['sig_out'] or '', |
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341 'category':'REQ' if function['category'] == 'request' else 'COMM', |
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342 'name':section, |
| 267 | 343 'args':self.getArguments(function['sig_in'], name=arg_doc, default=default ) |
|
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344 } |
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345 |
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346 if function["type"] == "signal": |
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347 completion['body'] = "pass" if not self.options.debug else 'debug ("%s")' % section |
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348 signals_part.append("""\ |
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349 @dbus.service.signal(const_INT_PREFIX+const_%(category)s_SUFFIX, |
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350 signature='%(sig_in)s') |
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351 def %(name)s(self, %(args)s): |
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352 %(body)s |
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353 """ % completion) |
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354 direct_calls.append("""\ |
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355 def %(name)s(self, %(args)s): |
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356 self.dbus_bridge.%(name)s(%(args)s) |
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357 """ % completion) |
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358 |
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359 elif function["type"] == "method": |
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360 completion['debug'] = "" if not self.options.debug else 'debug ("%s")\n%s' % (section,8*' ') |
| 267 | 361 completion['args_result'] = self.getArguments(function['sig_in'], name=arg_doc, unicode_protect=self.options.unicode) |
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362 methods_part.append("""\ |
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363 @dbus.service.method(const_INT_PREFIX+const_%(category)s_SUFFIX, |
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364 in_signature='%(sig_in)s', out_signature='%(sig_out)s') |
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365 def %(name)s(self, %(args)s): |
| 267 | 366 %(debug)sreturn self.cb["%(name)s"](%(args_result)s) |
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367 """ % completion) |
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368 |
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369 #at this point, signals_part, methods_part and direct_calls should be filled, |
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370 #we just have to place them in the right part of the template |
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371 core_bridge = [] |
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372 try: |
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373 with open(self.core_template) as core_template: |
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374 for line in core_template: |
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375 if line.startswith('##SIGNALS_PART##'): |
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376 core_bridge.extend(signals_part) |
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377 elif line.startswith('##METHODS_PART##'): |
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378 core_bridge.extend(methods_part) |
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379 elif line.startswith('##DIRECT_CALLS##'): |
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380 core_bridge.extend(direct_calls) |
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381 else: |
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382 core_bridge.append(line.replace('\n','')) |
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383 except IOError: |
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384 print ("Can't open template file [%s]" % self.core_template) |
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385 sys.exit(1) |
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386 |
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387 #now we write to final file |
|
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388 self.finalWrite(self.core_dest, core_bridge) |
| 267 | 389 |
| 390 def generateFrontendSide(self): | |
| 391 methods_part = [] | |
| 392 sections = self.bridge_template.sections() | |
| 393 sections.sort() | |
| 394 for section in sections: | |
| 395 function = self.getValues(section) | |
| 396 print ("Adding %s %s" % (section, function["type"])) | |
| 397 default = self.getDefault(section) | |
| 398 arg_doc = self.getArgumentsDoc(section) | |
| 399 completion = { | |
| 400 'sig_in':function['sig_in'] or '', | |
| 401 'sig_out':function['sig_out'] or '', | |
| 402 'category':'req' if function['category'] == 'request' else 'comm', | |
| 403 'name':section, | |
| 404 'args':self.getArguments(function['sig_in'], name=arg_doc, default=default ) | |
| 405 } | |
| 406 | |
| 407 if function["type"] == "method": | |
| 408 completion['debug'] = "" if not self.options.debug else 'debug ("%s")\n%s' % (section,8*' ') | |
| 409 completion['args_result'] = self.getArguments(function['sig_in'], name=arg_doc) | |
|
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410 result = "self.db_%(category)s_iface.%(name)s(%(args_result)s)" % completion |
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411 completion['result'] = ("unicode(%s)" if self.options.unicode and function['sig_out'] == 's' else "%s") % result |
| 267 | 412 methods_part.append("""\ |
| 413 def %(name)s(self, %(args)s): | |
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414 %(debug)sreturn %(result)s |
| 267 | 415 """ % completion) |
| 416 | |
| 417 #at this point, methods_part should be filled, | |
| 418 #we just have to place it in the right part of the template | |
| 419 frontend_bridge = [] | |
| 420 try: | |
| 421 with open(self.frontend_template) as frontend_template: | |
| 422 for line in frontend_template: | |
| 423 if line.startswith('##METHODS_PART##'): | |
| 424 frontend_bridge.extend(methods_part) | |
| 425 else: | |
| 426 frontend_bridge.append(line.replace('\n','')) | |
| 427 except IOError: | |
| 428 print ("Can't open template file [%s]" % self.frontend_template) | |
| 429 sys.exit(1) | |
| 430 | |
| 431 #now we write to final file | |
|
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432 self.finalWrite(self.frontend_dest, frontend_bridge) |
| 267 | 433 |
|
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434 |
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435 class ConstructorError(Exception): |
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436 pass |
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437 |
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438 class ConstructorFactory: |
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439 def create(self, bridge_template, options): |
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440 if options.protocole=='dbus': |
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441 return DbusConstructor(bridge_template, options) |
|
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442 elif options.protocole=='mediawiki': |
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443 return MediawikiConstructor(bridge_template, options) |
|
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444 |
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445 raise ConstructorError('Unknown constructor type') |
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446 |
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447 class BridgeConstructor: |
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448 def __init__(self): |
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449 self.options = None |
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450 |
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451 def check_options(self): |
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452 """Check command line options""" |
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453 _usage=""" |
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454 %prog [options] |
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455 |
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456 %prog --help for options list |
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457 """ |
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458 parser = OptionParser(usage=_usage,version=ABOUT % VERSION) |
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459 |
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460 parser.add_option("-p", "--protocole", action="store", type="string", default=DEFAULT_PROTOCOLE, |
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461 help="Generate bridge using PROTOCOLE (default: %s, possible values: [%s])" % (DEFAULT_PROTOCOLE, ", ".join(MANAGED_PROTOCOLES))) |
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462 parser.add_option("-s", "--side", action="store", type="string", default="core", |
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463 help="Which side of the bridge do you want to make ? (default: %default, possible values: [core, frontend])") |
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464 parser.add_option("-t", "--template", action="store", type="string", default='bridge_template.ini', |
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465 help="Use TEMPLATE to generate bridge (default: %default)") |
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466 parser.add_option("-f", "--force", action="store_true", default=False, |
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467 help=("Force overwritting of existing files")) |
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468 parser.add_option("-d", "--debug", action="store_true", default=False, |
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469 help=("Add debug information printing")) |
| 267 | 470 parser.add_option("--no_unicode", action="store_false", dest="unicode", default=True, |
| 471 help=("Remove unicode type protection from string results")) | |
| 472 | |
|
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473 |
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474 (self.options, args) = parser.parse_args() |
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475 return args |
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|
476 |
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477 def go(self): |
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478 self.check_options() |
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479 self.template = Parser() |
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480 try: |
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481 self.template.readfp(open(self.options.template)) |
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482 except IOError: |
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483 print ("The template file doesn't exist or is not accessible") |
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|
484 exit(1) |
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485 constructor = ConstructorFactory().create(self.template, self.options) |
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486 if self.options.side == "core": |
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487 constructor.generateCoreSide() |
| 267 | 488 elif self.options.side == "frontend": |
| 489 constructor.generateFrontendSide() | |
|
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490 |
|
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491 if __name__ == "__main__": |
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492 bc = BridgeConstructor() |
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493 bc.go() |