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annotate roundup/msgfmt.py @ 5450:f2fade4552c5

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replaced msgfmt.py with latest version supporting Python 3 fixed setup scripts for Python 3
author Christof Meerwald <cmeerw@cmeerw.org>
date Sat, 21 Jul 2018 16:29:20 +0100
parents 23b8e6067f7c
children 4d2e1fa03f0f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #! /usr/bin/env python
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2 # -*- coding: iso-8859-1 -*-
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3 # Written by Martin v. Loewis <loewis@informatik.hu-berlin.de>
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4 #
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5 # Changed by Christian 'Tiran' Heimes <tiran@cheimes.de> for the placeless
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6 # translation service (PTS) of Zope
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7 #
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8 # Fixed some bugs and updated to support msgctxt
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9 # by Hanno Schlichting <hanno@hannosch.eu>
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10
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11 """Generate binary message catalog from textual translation description.
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12
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13 This program converts a textual Uniforum-style message catalog (.po file) into
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14 a binary GNU catalog (.mo file). This is essentially the same function as the
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15 GNU msgfmt program, however, it is a simpler implementation.
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16
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17 This file was taken from Python-2.3.2/Tools/i18n and altered in several ways.
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18 Now you can simply use it from another python module:
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19
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20 from msgfmt import Msgfmt
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21 mo = Msgfmt(po).get()
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22
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23 where po is path to a po file as string, an opened po file ready for reading or
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24 a list of strings (readlines of a po file) and mo is the compiled mo file as
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25 binary string.
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26
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27 Exceptions:
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28
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29 * IOError if the file couldn't be read
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30
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31 * msgfmt.PoSyntaxError if the po file has syntax errors
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32 """
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33
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34 import array
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35 from ast import literal_eval
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36 import codecs
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37 from email.parser import HeaderParser
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38 import struct
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39 import sys
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40
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41 PY3 = sys.version_info[0] == 3
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42 if PY3:
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43 def header_charset(s):
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44 p = HeaderParser()
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45 return p.parsestr(s).get_content_charset()
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46
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47 import io
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48 BytesIO = io.BytesIO
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49 FILE_TYPE = io.IOBase
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50 else:
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51 def header_charset(s):
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52 p = HeaderParser()
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53 return p.parsestr(s.encode('utf-8', 'ignore')).get_content_charset()
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54
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55 from cStringIO import StringIO as BytesIO
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56 FILE_TYPE = file
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58
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59 class PoSyntaxError(Exception):
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60 """ Syntax error in a po file """
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61
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62 def __init__(self, msg):
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63 self.msg = msg
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64
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65 def __str__(self):
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66 return 'Po file syntax error: %s' % self.msg
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67
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68
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69 class Msgfmt:
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70
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71 def __init__(self, po, name='unknown'):
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72 self.po = po
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73 self.name = name
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74 self.messages = {}
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75 self.openfile = False
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76 # Start off assuming latin-1, so everything decodes without failure,
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77 # until we know the exact encoding
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78 self.encoding = 'latin-1'
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79
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80 def readPoData(self):
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81 """ read po data from self.po and return an iterator """
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82 output = []
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83 if isinstance(self.po, str):
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84 output = open(self.po, 'rb')
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85 elif isinstance(self.po, FILE_TYPE):
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86 self.po.seek(0)
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87 self.openfile = True
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88 output = self.po
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89 elif isinstance(self.po, list):
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90 output = self.po
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91 if not output:
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92 raise ValueError("self.po is invalid! %s" % type(self.po))
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93 if isinstance(output, FILE_TYPE):
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94 # remove BOM from the start of the parsed input
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95 first = output.readline()
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96 if len(first) == 0:
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97 return output.readlines()
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98 if first.startswith(codecs.BOM_UTF8):
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99 first = first.lstrip(codecs.BOM_UTF8)
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100 return [first] + output.readlines()
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101 return output
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102
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103 def add(self, context, id, string, fuzzy):
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104 "Add a non-empty and non-fuzzy translation to the dictionary."
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105 if string and not fuzzy:
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106 # The context is put before the id and separated by a EOT char.
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107 if context:
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108 id = context + u'\x04' + id
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109 if not id:
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110 # See whether there is an encoding declaration
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111 charset = header_charset(string)
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112 if charset:
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113 # decode header in proper encoding
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114 string = string.encode(self.encoding).decode(charset)
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115 if not PY3:
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116 # undo damage done by literal_eval in Python 2.x
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117 string = string.encode(self.encoding).decode(charset)
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118 self.encoding = charset
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119 self.messages[id] = string
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120
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121 def generate(self):
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122 "Return the generated output."
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123 # the keys are sorted in the .mo file
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124 keys = sorted(self.messages.keys())
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125 offsets = []
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126 ids = strs = b''
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127 for id in keys:
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128 msg = self.messages[id].encode(self.encoding)
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129 id = id.encode(self.encoding)
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130 # For each string, we need size and file offset. Each string is
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131 # NUL terminated; the NUL does not count into the size.
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132 offsets.append((len(ids), len(id), len(strs),
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133 len(msg)))
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134 ids += id + b'\0'
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135 strs += msg + b'\0'
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136 output = b''
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137 # The header is 7 32-bit unsigned integers. We don't use hash tables,
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138 # so the keys start right after the index tables.
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139 keystart = 7 * 4 + 16 * len(keys)
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140 # and the values start after the keys
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141 valuestart = keystart + len(ids)
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142 koffsets = []
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143 voffsets = []
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144 # The string table first has the list of keys, then the list of values.
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145 # Each entry has first the size of the string, then the file offset.
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146 for o1, l1, o2, l2 in offsets:
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147 koffsets += [l1, o1 + keystart]
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148 voffsets += [l2, o2 + valuestart]
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149 offsets = koffsets + voffsets
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diff changeset
150 # Even though we don't use a hashtable, we still set its offset to be
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151 # binary compatible with the gnu gettext format produced by:
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152 # msgfmt file.po --no-hash
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153 output = struct.pack("Iiiiiii",
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154 0x950412de, # Magic
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155 0, # Version
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156 len(keys), # # of entries
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157 7 * 4, # start of key index
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158 7 * 4 + len(keys) * 8, # start of value index
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159 0, keystart) # size and offset of hash table
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160 if PY3:
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161 output += array.array("i", offsets).tobytes()
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162 else:
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163 output += array.array("i", offsets).tostring()
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164 output += ids
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165 output += strs
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166 return output
2784
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167
5450
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168 def get(self):
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169 """ """
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170 self.read()
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171 # Compute output
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172 return self.generate()
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173
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174 def read(self, header_only=False):
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175 """ """
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176 ID = 1
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177 STR = 2
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178 CTXT = 3
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179
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180 section = None
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181 fuzzy = 0
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182 msgid = msgstr = msgctxt = u''
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183
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184 # Parse the catalog
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185 lno = 0
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186 for l in self.readPoData():
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187 l = l.decode(self.encoding)
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188 lno += 1
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189 # If we get a comment line after a msgstr or a line starting with
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190 # msgid or msgctxt, this is a new entry
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191 if section == STR and (l[0] == '#' or (l[0] == 'm' and
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192 (l.startswith('msgctxt') or l.startswith('msgid')))):
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193 self.add(msgctxt, msgid, msgstr, fuzzy)
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194 section = None
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195 fuzzy = 0
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196 # If we only want the header we stop after the first message
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197 if header_only:
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198 break
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199 # Record a fuzzy mark
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200 if l[:2] == '#,' and 'fuzzy' in l:
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201 fuzzy = 1
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202 # Skip comments
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203 if l[0] == '#':
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204 continue
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205 # Now we are in a msgctxt section
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206 if l.startswith('msgctxt'):
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207 section = CTXT
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208 l = l[7:]
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209 msgctxt = u''
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210 # Now we are in a msgid section, output previous section
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diff changeset
211 elif (l.startswith('msgid') and
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diff changeset
212 not l.startswith('msgid_plural')):
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diff changeset
213 if section == STR:
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diff changeset
214 self.add(msgid, msgstr, fuzzy)
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215 section = ID
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216 l = l[5:]
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217 msgid = msgstr = u''
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218 is_plural = False
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219 # This is a message with plural forms
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diff changeset
220 elif l.startswith('msgid_plural'):
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diff changeset
221 if section != ID:
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222 raise PoSyntaxError(
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223 'msgid_plural not preceeded by '
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diff changeset
224 'msgid on line %d of po file %s' %
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diff changeset
225 (lno, repr(self.name)))
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226 l = l[12:]
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227 msgid += u'\0' # separator of singular and plural
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228 is_plural = True
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229 # Now we are in a msgstr section
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diff changeset
230 elif l.startswith('msgstr'):
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diff changeset
231 section = STR
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diff changeset
232 if l.startswith('msgstr['):
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diff changeset
233 if not is_plural:
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234 raise PoSyntaxError(
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235 'plural without msgid_plural '
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diff changeset
236 'on line %d of po file %s' %
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diff changeset
237 (lno, repr(self.name)))
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diff changeset
238 l = l.split(']', 1)[1]
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diff changeset
239 if msgstr:
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diff changeset
240 # Separator of the various plural forms
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241 msgstr += u'\0'
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Christof Meerwald <cmeerw@cmeerw.org>
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diff changeset
242 else:
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parents: 5395
diff changeset
243 if is_plural:
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244 raise PoSyntaxError(
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diff changeset
245 'indexed msgstr required for '
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diff changeset
246 'plural on line %d of po file %s' %
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diff changeset
247 (lno, repr(self.name)))
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diff changeset
248 l = l[6:]
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diff changeset
249 # Skip empty lines
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250 l = l.strip()
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diff changeset
251 if not l:
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diff changeset
252 continue
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diff changeset
253 # TODO: Does this always follow Python escape semantics?
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diff changeset
254 try:
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diff changeset
255 l = literal_eval(l)
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diff changeset
256 except Exception as msg:
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diff changeset
257 raise PoSyntaxError(
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diff changeset
258 '%s (line %d of po file %s): \n%s' %
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diff changeset
259 (msg, lno, repr(self.name), l))
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diff changeset
260 if isinstance(l, bytes):
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diff changeset
261 l = l.decode(self.encoding)
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262 if section == CTXT:
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263 msgctxt += l
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264 elif section == ID:
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265 msgid += l
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266 elif section == STR:
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267 msgstr += l
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268 else:
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269 raise PoSyntaxError(
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270 'error on line %d of po file %s' %
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271 (lno, repr(self.name)))
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272
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273 # Add last entry
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274 if section == STR:
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275 self.add(msgctxt, msgid, msgstr, fuzzy)
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276
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277 if self.openfile:
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278 self.po.close()
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279
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280 def getAsFile(self):
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281 return BytesIO(self.get())
Roundup Issue Tracker: http://roundup-tracker.org/