Mercurial > pyntnclick
annotate scripts/msgfmt.py @ 779:087d3ff0aa08 pyntnclick
Move po scripts into scripts. Bundle msgfmt.py from cpython too
author | Stefano Rivera <stefano@rivera.za.net> |
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date | Sat, 26 Jan 2013 18:38:27 +0200 |
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children | 99e1e67f3916 |
rev | line source |
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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 |
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5 """Generate binary message catalog from textual translation description. |
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6 |
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7 This program converts a textual Uniforum-style message catalog (.po file) into |
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8 a binary GNU catalog (.mo file). This is essentially the same function as the |
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9 GNU msgfmt program, however, it is a simpler implementation. |
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10 |
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11 Usage: msgfmt.py [OPTIONS] filename.po |
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12 |
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13 Options: |
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14 -o file |
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15 --output-file=file |
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16 Specify the output file to write to. If omitted, output will go to a |
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17 file named filename.mo (based off the input file name). |
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18 |
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19 -h |
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20 --help |
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21 Print this message and exit. |
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22 |
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23 -V |
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24 --version |
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25 Display version information and exit. |
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26 """ |
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27 |
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28 import os |
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29 import sys |
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30 import ast |
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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: |
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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 |
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104 # Compute .mo name from .po name and arguments |
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105 if filename.endswith('.po'): |
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106 infile = filename |
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107 else: |
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108 infile = filename + '.po' |
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109 if outfile is None: |
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110 outfile = os.path.splitext(infile)[0] + '.mo' |
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111 |
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112 try: |
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113 lines = open(infile).readlines() |
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114 except IOError, msg: |
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115 print >> sys.stderr, msg |
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116 sys.exit(1) |
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117 |
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118 section = None |
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119 fuzzy = 0 |
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120 |
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121 # Parse the catalog |
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122 lno = 0 |
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123 for l in lines: |
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124 lno += 1 |
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125 # If we get a comment line after a msgstr, this is a new entry |
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126 if l[0] == '#' and section == STR: |
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127 add(msgid, msgstr, fuzzy) |
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128 section = None |
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129 fuzzy = 0 |
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130 # Record a fuzzy mark |
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131 if l[:2] == '#,' and 'fuzzy' in l: |
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132 fuzzy = 1 |
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133 # Skip comments |
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134 if l[0] == '#': |
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135 continue |
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136 # Now we are in a msgid section, output previous section |
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137 if l.startswith('msgid') and not l.startswith('msgid_plural'): |
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138 if section == STR: |
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139 add(msgid, msgstr, fuzzy) |
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140 section = ID |
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141 l = l[5:] |
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142 msgid = msgstr = '' |
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143 is_plural = False |
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144 # This is a message with plural forms |
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145 elif l.startswith('msgid_plural'): |
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146 if section != ID: |
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147 print >> sys.stderr, 'msgid_plural not preceeded by msgid on %s:%d' %\ |
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148 (infile, lno) |
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149 sys.exit(1) |
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150 l = l[12:] |
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151 msgid += '\0' # separator of singular and plural |
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152 is_plural = True |
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153 # Now we are in a msgstr section |
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154 elif l.startswith('msgstr'): |
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155 section = STR |
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156 if l.startswith('msgstr['): |
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157 if not is_plural: |
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158 print >> sys.stderr, 'plural without msgid_plural on %s:%d' %\ |
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159 (infile, lno) |
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160 sys.exit(1) |
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161 l = l.split(']', 1)[1] |
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162 if msgstr: |
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163 msgstr += '\0' # Separator of the various plural forms |
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164 else: |
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165 if is_plural: |
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166 print >> sys.stderr, 'indexed msgstr required for plural on %s:%d' %\ |
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167 (infile, lno) |
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168 sys.exit(1) |
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169 l = l[6:] |
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170 # Skip empty lines |
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171 l = l.strip() |
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172 if not l: |
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173 continue |
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174 l = ast.literal_eval(l) |
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175 if section == ID: |
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176 msgid += l |
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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 >> sys.stderr, 'Syntax error on %s:%d' % (infile, lno), \ |
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181 'before:' |
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182 print >> sys.stderr, l |
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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 |
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191 try: |
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192 open(outfile,"wb").write(output) |
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193 except IOError,msg: |
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194 print >> sys.stderr, msg |
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195 |
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196 |
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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, msg: |
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203 usage(1, msg) |
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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'): |
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209 usage(0) |
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210 elif opt in ('-V', '--version'): |
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211 print >> sys.stderr, "msgfmt.py", __version__ |
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212 sys.exit(0) |
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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 >> sys.stderr, 'No input file given' |
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218 print >> sys.stderr, "Try `msgfmt --help' for more information." |
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219 return |
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220 |
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221 for filename in args: |
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222 make(filename, outfile) |
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223 |
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224 |
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225 if __name__ == '__main__': |
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226 main() |