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annotate roundup/msgfmt.py @ 5380:64c4e43fbb84

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Python 3 preparation: numeric literal syntax. Fixes octal constants to use leading 0o, and removes 'L' suffixes. Tool-assisted patch.
author Joseph Myers <jsm@polyomino.org.uk>
date Tue, 24 Jul 2018 21:43:32 +0000
parents 64b05e24dbd8
children 23b8e6067f7c
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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 from __future__ import print_function
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30 import sys
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31 import os
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32 import getopt
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33 import struct
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34 import array
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35
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36 __version__ = "1.1"
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37
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38 MESSAGES = {}
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39
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40
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41
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42 def usage(code, msg=''):
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43 print(__doc__, file=sys.stderr)
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44 if msg:
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45 print(msg, file=sys.stderr)
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46 sys.exit(code)
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47
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48
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49
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50 def add(id, str, fuzzy):
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51 "Add a non-fuzzy translation to the dictionary."
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52 global MESSAGES
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53 if not fuzzy and str and not str.startswith('\0'):
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54 MESSAGES[id] = str
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55
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56
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57
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58 def generate():
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59 "Return the generated output."
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60 global MESSAGES
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61 keys = MESSAGES.keys()
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62 # the keys are sorted in the .mo file
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63 keys.sort()
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64 offsets = []
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65 ids = strs = ''
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66 for id in keys:
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67 # For each string, we need size and file offset. Each string is NUL
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68 # terminated; the NUL does not count into the size.
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69 offsets.append((len(ids), len(id), len(strs), len(MESSAGES[id])))
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70 ids += id + '\0'
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71 strs += MESSAGES[id] + '\0'
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72 output = ''
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73 # The header is 7 32-bit unsigned integers. We don't use hash tables, so
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74 # the keys start right after the index tables.
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75 # translated string.
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76 keystart = 7*4+16*len(keys)
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77 # and the values start after the keys
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78 valuestart = keystart + len(ids)
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79 koffsets = []
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80 voffsets = []
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81 # The string table first has the list of keys, then the list of values.
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82 # Each entry has first the size of the string, then the file offset.
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83 for o1, l1, o2, l2 in offsets:
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84 koffsets += [l1, o1+keystart]
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85 voffsets += [l2, o2+valuestart]
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86 offsets = koffsets + voffsets
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87 output = struct.pack("Iiiiiii",
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88 0x950412de, # Magic
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89 0, # Version
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90 len(keys), # # of entries
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91 7*4, # start of key index
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92 7*4+len(keys)*8, # start of value index
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93 0, 0) # size and offset of hash table
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94 output += array.array("i", offsets).tostring()
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95 output += ids
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96 output += strs
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97 return output
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98
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99
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100
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101 def make(filename, outfile):
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102 ID = 1
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103 STR = 2
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104 global MESSAGES
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105 MESSAGES = {}
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106
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107 msgid = None
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108 msgstr = None
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109
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110 # Compute .mo name from .po name and arguments
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111 if filename.endswith('.po'):
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112 infile = filename
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113 else:
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114 infile = filename + '.po'
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115 if outfile is None:
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116 outfile = os.path.splitext(infile)[0] + '.mo'
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117
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118 try:
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119 lines = open(infile).readlines()
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120 except IOError as msg:
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121 print(msg, file=sys.stderr)
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122 sys.exit(1)
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123
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124 # remove UTF-8 Byte Order Mark, if any.
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125 # (UCS2 BOMs are not handled because messages in UCS2 cannot be handled)
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126 if lines[0].startswith('\xEF\xBB\xBF'):
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127 lines[0] = lines[0][3:]
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128
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129 section = None
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130 fuzzy = 0
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131
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132 # Parse the catalog
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133 lno = 0
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134 for l in lines:
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135 lno += 1
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136 # If we get a comment line after a msgstr, this is a new entry
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137 if l[0] == '#' and section == STR:
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138 add(msgid, msgstr, fuzzy)
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139 section = None
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140 fuzzy = 0
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141 # Record a fuzzy mark
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142 if l[:2] == '#,' and (l.find('fuzzy') >= 0):
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143 fuzzy = 1
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144 # Skip comments
40643f8b41a0 catalog compilation utility for message translations
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145 if l[0] == '#':
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146 continue
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147 # Start of msgid_plural section, separate from singular form with \0
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148 if l.startswith('msgid_plural'):
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149 msgid += '\0'
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150 l = l[12:]
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151 # Now we are in a msgid section, output previous section
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152 elif l.startswith('msgid'):
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153 if section == STR:
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154 add(msgid, msgstr, fuzzy)
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155 section = ID
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156 l = l[5:]
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157 msgid = msgstr = ''
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158 # Now we are in a msgstr section
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159 elif l.startswith('msgstr'):
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160 section = STR
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161 l = l[6:]
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162 # Check for plural forms
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163 if l.startswith('['):
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164 # Separate plural forms with \0
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165 if not l.startswith('[0]'):
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166 msgstr += '\0'
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167 # Ignore the index - must come in sequence
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168 l = l[l.index(']') + 1:]
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169 # Skip empty lines
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170 l = l.strip()
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171 if not l:
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172 continue
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173 # XXX: Does this always follow Python escape semantics?
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174 l = eval(l)
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175 if section == ID:
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176 msgid += l
40643f8b41a0 catalog compilation utility for message translations
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177 elif section == STR:
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178 msgstr += l
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179 else:
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180 print('Syntax error on %s:%d' % (infile, lno),
64b05e24dbd8 Python 3 preparation: convert print to a function.
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181 'before:', file=sys.stderr)
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182 print(l, file=sys.stderr)
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183 sys.exit(1)
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184 # Add last entry
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185 if section == STR:
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186 add(msgid, msgstr, fuzzy)
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187
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188 # Compute output
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189 output = generate()
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190
40643f8b41a0 catalog compilation utility for message translations
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191 try:
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192 open(outfile,"wb").write(output)
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193 except IOError as msg:
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194 print(msg, file=sys.stderr)
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195
40643f8b41a0 catalog compilation utility for message translations
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196
40643f8b41a0 catalog compilation utility for message translations
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197
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198 def main():
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199 try:
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200 opts, args = getopt.getopt(sys.argv[1:], 'hVo:',
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201 ['help', 'version', 'output-file='])
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202 except getopt.error as msg:
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203 usage(1, msg)
40643f8b41a0 catalog compilation utility for message translations
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204
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205 outfile = None
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206 # parse options
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207 for opt, arg in opts:
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208 if opt in ('-h', '--help'):
40643f8b41a0 catalog compilation utility for message translations
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209 usage(0)
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210 elif opt in ('-V', '--version'):
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211 print("msgfmt.py", __version__, file=sys.stderr)
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212 sys.exit(0)
40643f8b41a0 catalog compilation utility for message translations
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213 elif opt in ('-o', '--output-file'):
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214 outfile = arg
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215 # do it
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216 if not args:
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217 print('No input file given', file=sys.stderr)
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218 print("Try `msgfmt --help' for more information.", file=sys.stderr)
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219 return
40643f8b41a0 catalog compilation utility for message translations
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220
40643f8b41a0 catalog compilation utility for message translations
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221 for filename in args:
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222 make(filename, outfile)
40643f8b41a0 catalog compilation utility for message translations
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223
40643f8b41a0 catalog compilation utility for message translations
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224
40643f8b41a0 catalog compilation utility for message translations
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225 if __name__ == '__main__':
40643f8b41a0 catalog compilation utility for message translations
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226 main()
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7000070fe600 ignore UTF-8 BOM in po file
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227
7000070fe600 ignore UTF-8 BOM in po file
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228 # vim: set et sts=4 sw=4 :
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