Mercurial > p > roundup > code

annotate roundup/i18n.py @ 5296:b48e2fe4a7bd

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Make tracker user native (postgres) test indexer. This is apparently how things are expected to be set up on the server. Leaving it blank pulls in the xapian indexer which they don't want.
author John Rouillard <rouilj@ieee.org>
date Thu, 28 Sep 2017 19:22:21 -0400
parents 6102252d3a8a
children 56c9bcdea47f
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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 RoundUp Internationalization (I18N)
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20
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21 To use this module, the following code should be used::
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22
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23 from roundup.i18n import _
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24 ...
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25 print _("Some text that can be translated")
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26
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27 Note that to enable re-ordering of inserted texts in formatting strings
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28 (which can easily happen if a sentence has to be re-ordered due to
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29 grammatical changes), translatable formats should use named format specs::
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31 ... _('Index of %(classname)s') % {'classname': cn} ...
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32
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33 Also, this eases the job of translators since they have some context what
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34 the dynamic portion of a message really means.
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35 """
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36 __docformat__ = 'restructuredtext'
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37
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38 import errno
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39 import gettext as gettext_module
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40 import os
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41
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42 from roundup import msgfmt
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43
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44 # List of directories for mo file search (see SF bug 1219689)
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45 LOCALE_DIRS = [
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46 gettext_module._default_localedir,
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47 ]
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48 # compute mo location relative to roundup installation directory
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49 # (prefix/lib/python/site-packages/roundup/msgfmt.py on posix systems,
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50 # prefix/lib/site-packages/roundup/msgfmt.py on windows).
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51 # locale root is prefix/share/locale.
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52 if os.name == "nt":
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53 _mo_path = [".."] * 4 + ["share", "locale"]
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54 else:
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55 _mo_path = [".."] * 5 + ["share", "locale"]
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56 _mo_path = os.path.normpath(os.path.join(msgfmt.__file__, *_mo_path))
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57 if _mo_path not in LOCALE_DIRS:
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58 LOCALE_DIRS.append(_mo_path)
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59 del _mo_path
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60
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61 # Roundup text domain
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62 DOMAIN = "roundup"
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63
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64 RoundupNullTranslations = gettext_module.NullTranslations
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65 RoundupTranslations = gettext_module.GNUTranslations
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66
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67 def find_locales(language=None):
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68 """Return normalized list of locale names to try for given language
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69
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70 Argument 'language' may be a single language code or a list of codes.
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71 If 'language' is omitted or None, use locale settings in OS environment.
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72
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73 """
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74 # body of this function is borrowed from gettext_module.find()
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75 if language is None:
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76 languages = []
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77 for envar in ('LANGUAGE', 'LC_ALL', 'LC_MESSAGES', 'LANG'):
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78 val = os.environ.get(envar)
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79 if val:
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80 languages = val.split(':')
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81 break
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82 elif isinstance(language, str) or isinstance(language, unicode):
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83 languages = [language]
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84 else:
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85 # 'language' must be iterable
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86 languages = language
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87 # now normalize and expand the languages
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88 nelangs = []
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89 for lang in languages:
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90 for nelang in gettext_module._expand_lang(lang):
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91 if nelang not in nelangs:
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92 nelangs.append(nelang)
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93 return nelangs
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94
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95 def get_mofile(languages, localedir, domain=None):
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96 """Return the first of .mo files found in localedir for languages
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97
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98 Parameters:
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99 languages:
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100 list of locale names to try
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101 localedir:
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102 path to directory containing locale files.
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103 Usually this is either gettext_module._default_localedir
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104 or 'locale' subdirectory in the tracker home.
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105 domain:
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106 optional name of messages domain.
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107 If omitted or None, work with simplified
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108 locale directory, as used in tracker homes:
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109 message catalogs are kept in files locale.po
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110 instead of locale/LC_MESSAGES/domain.po
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111
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112 Return the path of the first .mo file found.
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113 If nothing found, return None.
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114
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115 Automatically compile .po files if necessary.
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116
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117 """
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118 for locale in languages:
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119 if locale == "C":
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120 break
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121 if domain:
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122 basename = os.path.join(localedir, locale, "LC_MESSAGES", domain)
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123 else:
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124 basename = os.path.join(localedir, locale)
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125 # look for message catalog files, check timestamps
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126 mofile = basename + ".mo"
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127 if os.path.isfile(mofile):
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128 motime = os.path.getmtime(mofile)
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129 else:
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130 motime = 0
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131 pofile = basename + ".po"
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132 if os.path.isfile(pofile):
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133 potime = os.path.getmtime(pofile)
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134 else:
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135 potime = 0
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136 # see what we've found
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137 if motime < potime:
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138 # compile
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139 msgfmt.make(pofile, mofile)
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140 elif motime == 0:
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141 # no files found - proceed to the next locale name
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142 continue
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143 # .mo file found or made
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144 return mofile
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145 return None
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146
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147 def get_translation(language=None, tracker_home=None,
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148 translation_class=RoundupTranslations,
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149 null_translation_class=RoundupNullTranslations
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150 ):
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151 """Return Translation object for given language and domain
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152
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153 Argument 'language' may be a single language code or a list of codes.
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154 If 'language' is omitted or None, use locale settings in OS environment.
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155
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156 Arguments 'translation_class' and 'null_translation_class'
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157 specify the classes that are instantiated for existing
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158 and non-existing translations, respectively.
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159
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160 """
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161 mofiles = []
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162 # locale directory paths
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163 if tracker_home is None:
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164 tracker_locale = None
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165 else:
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166 tracker_locale = os.path.join(tracker_home, "locale")
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167 # get the list of locales
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168 locales = find_locales(language)
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169 # add mofiles found in the tracker, then in the system locale directory
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170 if tracker_locale:
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171 mofiles.append(get_mofile(locales, tracker_locale))
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172 for system_locale in LOCALE_DIRS:
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173 mofiles.append(get_mofile(locales, system_locale, DOMAIN))
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174 # we want to fall back to english unless english is selected language
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175 if "en" not in locales:
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176 locales = find_locales("en")
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177 # add mofiles found in the tracker, then in the system locale directory
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178 if tracker_locale:
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179 mofiles.append(get_mofile(locales, tracker_locale))
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180 for system_locale in LOCALE_DIRS:
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181 mofiles.append(get_mofile(locales, system_locale, DOMAIN))
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182 # filter out elements that are not found
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183 mofiles = filter(None, mofiles)
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184 translator = None
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185 for mofile in mofiles:
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186 try:
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187 mo = open(mofile, "rb")
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188 if translator is None:
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189 translator = translation_class(mo)
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190 else:
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191 # note: current implementation of gettext_module
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192 # always adds fallback to the end of the fallback chain.
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193 translator.add_fallback(translation_class(mo))
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194 except IOError:
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195 # ignore unreadable .mo files
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196 pass
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197 if translator is None:
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198 translator = null_translation_class()
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199 return translator
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200
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201 # static translations object
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202 translation = get_translation()
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203 # static translation functions
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204 _ = gettext = translation.gettext
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205 ugettext = translation.ugettext
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206 ngettext = translation.ngettext
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207 ungettext = translation.ungettext
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208
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209 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/