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annotate roundup/msgfmt.py @ 4736:8a32d8223aa4

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CHANGES.txt: Mention demo.py fixes
author anatoly techtonik <techtonik@gmail.com>
date Mon, 14 Jan 2013 18:26:09 +0300
parents 7000070fe600
children 4498f5252f8b c643d693d91e
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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. Löwis <loewis@informatik.hu-berlin.de>
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4 # Plural forms support added by alexander smishlajev <alex@tycobka.lv>
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5
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6 """Generate binary message catalog from textual translation description.
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7
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8 This program converts a textual Uniforum-style message catalog (.po file) into
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9 a binary GNU catalog (.mo file). This is essentially the same function as the
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10 GNU msgfmt program, however, it is a simpler implementation.
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11
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12 Usage: msgfmt.py [OPTIONS] filename.po
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13
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14 Options:
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15 -o file
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16 --output-file=file
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17 Specify the output file to write to. If omitted, output will go to a
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18 file named filename.mo (based off the input file name).
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19
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20 -h
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21 --help
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22 Print this message and exit.
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23
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24 -V
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25 --version
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26 Display version information and exit.
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27 """
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28
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29 import sys
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30 import os
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31 import getopt
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32 import struct
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33 import array
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34
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35 __version__ = "1.1"
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36
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37 MESSAGES = {}
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38
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39
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40
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41 def usage(code, msg=''):
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42 print >> sys.stderr, __doc__
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43 if msg:
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44 print >> sys.stderr, msg
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45 sys.exit(code)
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46
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47
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48
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49 def add(id, str, fuzzy):
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50 "Add a non-fuzzy translation to the dictionary."
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51 global MESSAGES
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52 if not fuzzy and str and not str.startswith('\0'):
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53 MESSAGES[id] = str
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54
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55
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56
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57 def generate():
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58 "Return the generated output."
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59 global MESSAGES
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60 keys = MESSAGES.keys()
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61 # the keys are sorted in the .mo file
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62 keys.sort()
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63 offsets = []
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64 ids = strs = ''
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65 for id in keys:
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66 # For each string, we need size and file offset. Each string is NUL
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67 # terminated; the NUL does not count into the size.
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68 offsets.append((len(ids), len(id), len(strs), len(MESSAGES[id])))
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69 ids += id + '\0'
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70 strs += MESSAGES[id] + '\0'
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71 output = ''
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72 # The header is 7 32-bit unsigned integers. We don't use hash tables, so
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73 # the keys start right after the index tables.
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74 # translated string.
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75 keystart = 7*4+16*len(keys)
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76 # and the values start after the keys
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77 valuestart = keystart + len(ids)
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78 koffsets = []
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79 voffsets = []
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80 # The string table first has the list of keys, then the list of values.
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81 # Each entry has first the size of the string, then the file offset.
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82 for o1, l1, o2, l2 in offsets:
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83 koffsets += [l1, o1+keystart]
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84 voffsets += [l2, o2+valuestart]
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85 offsets = koffsets + voffsets
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86 output = struct.pack("Iiiiiii",
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87 0x950412deL, # Magic
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88 0, # Version
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89 len(keys), # # of entries
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90 7*4, # start of key index
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91 7*4+len(keys)*8, # start of value index
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92 0, 0) # size and offset of hash table
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93 output += array.array("i", offsets).tostring()
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94 output += ids
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95 output += strs
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96 return output
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97
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98
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99
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100 def make(filename, outfile):
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101 ID = 1
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102 STR = 2
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103 global MESSAGES
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104 MESSAGES = {}
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105
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106 # Compute .mo name from .po name and arguments
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107 if filename.endswith('.po'):
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108 infile = filename
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109 else:
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110 infile = filename + '.po'
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111 if outfile is None:
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112 outfile = os.path.splitext(infile)[0] + '.mo'
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113
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114 try:
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115 lines = open(infile).readlines()
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116 except IOError, msg:
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117 print >> sys.stderr, msg
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118 sys.exit(1)
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119
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120 # remove UTF-8 Byte Order Mark, if any.
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121 # (UCS2 BOMs are not handled because messages in UCS2 cannot be handled)
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122 if lines[0].startswith('\xEF\xBB\xBF'):
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123 lines[0] = lines[0][3:]
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124
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125 section = None
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126 fuzzy = 0
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127
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128 # Parse the catalog
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129 lno = 0
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130 for l in lines:
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131 lno += 1
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132 # If we get a comment line after a msgstr, this is a new entry
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133 if l[0] == '#' and section == STR:
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134 add(msgid, msgstr, fuzzy)
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135 section = None
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136 fuzzy = 0
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137 # Record a fuzzy mark
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138 if l[:2] == '#,' and (l.find('fuzzy') >= 0):
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139 fuzzy = 1
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140 # Skip comments
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141 if l[0] == '#':
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142 continue
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143 # Start of msgid_plural section, separate from singular form with \0
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144 if l.startswith('msgid_plural'):
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145 msgid += '\0'
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146 l = l[12:]
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147 # Now we are in a msgid section, output previous section
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148 elif l.startswith('msgid'):
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149 if section == STR:
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150 add(msgid, msgstr, fuzzy)
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151 section = ID
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152 l = l[5:]
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153 msgid = msgstr = ''
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154 # Now we are in a msgstr section
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155 elif l.startswith('msgstr'):
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156 section = STR
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157 l = l[6:]
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158 # Check for plural forms
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159 if l.startswith('['):
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160 # Separate plural forms with \0
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161 if not l.startswith('[0]'):
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162 msgstr += '\0'
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163 # Ignore the index - must come in sequence
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164 l = l[l.index(']') + 1:]
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165 # Skip empty lines
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166 l = l.strip()
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167 if not l:
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168 continue
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169 # XXX: Does this always follow Python escape semantics?
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170 l = eval(l)
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171 if section == ID:
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172 msgid += l
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173 elif section == STR:
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174 msgstr += l
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175 else:
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176 print >> sys.stderr, 'Syntax error on %s:%d' % (infile, lno), \
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177 'before:'
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178 print >> sys.stderr, l
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179 sys.exit(1)
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180 # Add last entry
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181 if section == STR:
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182 add(msgid, msgstr, fuzzy)
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183
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184 # Compute output
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185 output = generate()
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186
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187 try:
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188 open(outfile,"wb").write(output)
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189 except IOError,msg:
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190 print >> sys.stderr, msg
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191
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192
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193
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194 def main():
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195 try:
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196 opts, args = getopt.getopt(sys.argv[1:], 'hVo:',
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197 ['help', 'version', 'output-file='])
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198 except getopt.error, msg:
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199 usage(1, msg)
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200
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201 outfile = None
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202 # parse options
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203 for opt, arg in opts:
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204 if opt in ('-h', '--help'):
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205 usage(0)
40643f8b41a0 catalog compilation utility for message translations
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206 elif opt in ('-V', '--version'):
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207 print >> sys.stderr, "msgfmt.py", __version__
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208 sys.exit(0)
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209 elif opt in ('-o', '--output-file'):
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210 outfile = arg
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211 # do it
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212 if not args:
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213 print >> sys.stderr, 'No input file given'
40643f8b41a0 catalog compilation utility for message translations
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214 print >> sys.stderr, "Try `msgfmt --help' for more information."
40643f8b41a0 catalog compilation utility for message translations
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215 return
40643f8b41a0 catalog compilation utility for message translations
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216
40643f8b41a0 catalog compilation utility for message translations
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217 for filename in args:
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218 make(filename, outfile)
40643f8b41a0 catalog compilation utility for message translations
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219
40643f8b41a0 catalog compilation utility for message translations
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220
40643f8b41a0 catalog compilation utility for message translations
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221 if __name__ == '__main__':
40643f8b41a0 catalog compilation utility for message translations
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222 main()
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223
7000070fe600 ignore UTF-8 BOM in po file
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224 # vim: set et sts=4 sw=4 :
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