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annotate roundup/i18n.py @ 6524:f961dbbc3573

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issue2551167 roundup issues when using pip install Running pip install generates a wheel install. This places locale, template and man pages under site-packages/usr/share/.... These changes make roundup look there for templates (affecting admin.py) and locale (affecting i18n.py) files. This also makes it work better in virtual environment and containers (docker). There is also a commented out bit of code in setup.py that prevents it from making a bdist_wheel forcing a regular install with files put under /usr/locale etc. This can be re-enabled if needed for 2.2 if there are still issues with roundup that aren't solved by then.
author John Rouillard <rouilj@ieee.org>
date Sun, 07 Nov 2021 01:49:03 -0400
parents 808f7a8ed2b6
children 5ad7fb912227
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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 gettext as gettext_module
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39 import os
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40
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41 from roundup import msgfmt
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42 from roundup.anypy.strings import is_us
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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 # find path when locale files are installed as part of a wheel
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62 # roundup.__path__ should be something like:
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63 # /usr/local/lib/python3.10/site-packages/roundup
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64 # os.prefix should be /usr, /usr/local or root of virtualenv
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65 # strip leading / to make os.path.join work right.
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66 import roundup, sys
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67 _ldir = os.path.join(
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68 os.path.dirname(roundup.__path__[0]),
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69 sys.prefix[1:], 'share', 'locale')
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70 if os.path.isdir(_ldir):
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71 LOCALE_DIRS.append(_ldir)
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72 del _ldir
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73
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74 # Roundup text domain
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75 DOMAIN = "roundup"
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76
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77 RoundupNullTranslations = gettext_module.NullTranslations
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78 RoundupTranslations = gettext_module.GNUTranslations
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80
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81 def find_locales(language=None):
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82 """Return normalized list of locale names to try for given language
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83
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84 Argument 'language' may be a single language code or a list of codes.
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85 If 'language' is omitted or None, use locale settings in OS environment.
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86
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87 """
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88 # body of this function is borrowed from gettext_module.find()
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89 if language is None:
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90 languages = []
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91 for envar in ('LANGUAGE', 'LC_ALL', 'LC_MESSAGES', 'LANG'):
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92 val = os.environ.get(envar)
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93 if val:
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94 languages = val.split(':')
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95 break
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96 elif is_us(language):
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97 languages = [language]
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98 else:
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99 # 'language' must be iterable
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100 languages = language
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101 # now normalize and expand the languages
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102 nelangs = []
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103 for lang in languages:
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104 for nelang in gettext_module._expand_lang(lang):
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105 if nelang not in nelangs:
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106 nelangs.append(nelang)
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107 return nelangs
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108
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109
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110 def get_mofile(languages, localedir, domain=None):
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111 """Return the first of .mo files found in localedir for languages
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112
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113 Parameters:
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114 languages:
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115 list of locale names to try
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116 localedir:
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117 path to directory containing locale files.
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118 Usually this is either gettext_module._default_localedir
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119 or 'locale' subdirectory in the tracker home.
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120 domain:
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121 optional name of messages domain.
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122 If omitted or None, work with simplified
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123 locale directory, as used in tracker homes:
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124 message catalogs are kept in files locale.po
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125 instead of locale/LC_MESSAGES/domain.po
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126
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127 Return the path of the first .mo file found.
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128 If nothing found, return None.
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129
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130 Automatically compile .po files if necessary.
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131
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132 """
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133 for locale in languages:
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134 if locale == "C":
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135 break
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136 if domain:
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137 basename = os.path.join(localedir, locale, "LC_MESSAGES", domain)
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138 else:
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139 basename = os.path.join(localedir, locale)
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140 # look for message catalog files, check timestamps
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141 mofile = basename + ".mo"
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142 if os.path.isfile(mofile):
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143 motime = os.path.getmtime(mofile)
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144 else:
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145 motime = 0
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146 pofile = basename + ".po"
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147 if os.path.isfile(pofile):
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148 potime = os.path.getmtime(pofile)
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149 else:
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150 potime = 0
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151 # see what we've found
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152 if motime < potime:
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153 # compile
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154 mo = msgfmt.Msgfmt(pofile).get()
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155 open(mofile, 'wb').write(mo)
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156 elif motime == 0:
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157 # no files found - proceed to the next locale name
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158 continue
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159 # .mo file found or made
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160 return mofile
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161 return None
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162
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163
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164 def get_translation(language=None, tracker_home=None,
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165 translation_class=RoundupTranslations,
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166 null_translation_class=RoundupNullTranslations):
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167 """Return Translation object for given language and domain
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168
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169 Argument 'language' may be a single language code or a list of codes.
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170 If 'language' is omitted or None, use locale settings in OS environment.
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171
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172 Arguments 'translation_class' and 'null_translation_class'
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173 specify the classes that are instantiated for existing
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174 and non-existing translations, respectively.
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175
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176 """
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177 mofiles = []
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178 # locale directory paths
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179 if tracker_home is None:
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180 tracker_locale = None
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181 else:
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182 tracker_locale = os.path.join(tracker_home, "locale")
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183 # get the list of locales
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184 locales = find_locales(language)
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185 # add mofiles found in the tracker, then in the system locale directory
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186 if tracker_locale:
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187 mofiles.append(get_mofile(locales, tracker_locale))
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188 for system_locale in LOCALE_DIRS:
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189 mofiles.append(get_mofile(locales, system_locale, DOMAIN))
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190 # we want to fall back to english unless english is selected language
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191 if "en" not in locales:
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192 locales = find_locales("en")
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193 # add mofiles found in the tracker, then in the system locale directory
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194 if tracker_locale:
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195 mofiles.append(get_mofile(locales, tracker_locale))
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196 for system_locale in LOCALE_DIRS:
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197 mofiles.append(get_mofile(locales, system_locale, DOMAIN))
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198 # filter out elements that are not found
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199 mofiles = filter(None, mofiles)
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200 translator = None
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201 for mofile in mofiles:
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202 try:
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203 mo = open(mofile, "rb")
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204 if translator is None:
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205 translator = translation_class(mo)
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206 else:
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207 # note: current implementation of gettext_module
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208 # always adds fallback to the end of the fallback chain.
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209 translator.add_fallback(translation_class(mo))
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210 mo.close()
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211 except IOError:
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212 # ignore unreadable .mo files
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213 pass
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214 if translator is None:
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215 translator = null_translation_class()
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216 return translator
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217
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218
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219 # static translations object
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220 translation = get_translation()
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221 # static translation functions
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222 _ = gettext = translation.gettext
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223 try:
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224 # Python 2.
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225 ugettext = translation.ugettext
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226 except AttributeError:
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227 # Python 3.
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228 ugettext = translation.gettext
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229 ngettext = translation.ngettext
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230 try:
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231 # Python 2.
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232 ungettext = translation.ungettext
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233 except AttributeError:
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234 # Python 3.
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235 ungettext = translation.ngettext
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236
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237 # vim: set filetype=python sts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/