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#!/usr/bin/env python
# -*- coding: utf-8 -*-

import errno, glob, polib, re, os, getopt, sys
from time import strftime

def usage():
    print '\nUsage: python %s [OPTION]' %os.path.basename(sys.argv[0])
    print '       generates po file for existing lang translations'
    print 'Options: -h, --help                         : usage'
    print '         -l lang_code, --language lang_code : code of the translation language'
    sys.exit(2)
try:
    opts, args = getopt.getopt(sys.argv[1:], "hl:", ["help", "language="])
except getopt.GetoptError:
    usage() # print help information and exit

language=''
for o,a in opts:
    if o in ("-h", "--help"):
        usage()
    if o in ("-l", "--language"):
        lang_code=a

if lang_code == '':
    sys.exit('Empty language code')

file_extension = '.' + lang_code + '.lang'
file_mask = '*' + file_extension
for langfile in glob.glob(file_mask):
  langfilename = langfile.replace(file_extension, '')
  # Create localization directories if needed
  podir = langfilename + '/po'
  try:
    os.makedirs(podir)
  except OSError, e:
    if e.errno != errno.EEXIST:
        raise
  #open lang file
  text = open(langfile,"r").read()
  #Remove trailing spaces from lines
  spaces=' {1,}\n'
  spattern=re.compile(spaces,re.DOTALL)
  for emptyline in spattern.findall(text):
    text = text.replace(emptyline,'\n')
  text = text.replace('\n\n','\n\n\n\n')+'\n'

  # Write PO file
  po = polib.POFile()
  pocreationtime = strftime('%Y-%m-%d %H:%M%z')
  po.metadata = {
    'Project-Id-Version': langfile,
    'Report-Msgid-Bugs-To': 'mageia-i18n@mageia.org',
    'POT-Creation-Date': pocreationtime,
    'PO-Revision-Date': pocreationtime,
    'Last-Translator': 'Duffy Duck <d_duck@nowhere.net>',
    'Language-Team': lang_code + ' <mageia-' + lang_code + '@mageia.org>',
    'MIME-Version': '1.0',
    'Content-Type': 'text/plain; charset=UTF-8',
    'Content-Transfer-Encoding': '8bit',
    }

  # Parse contents and add them to PO
  messagetemplate='\n\n#\ .*?\n\n'
  mpattern=re.compile(messagetemplate,re.DOTALL)
  for mblock in mpattern.findall(text):
    mblock_stripped = mblock.strip('\n')
    message_comment, message_text = mblock.strip('\n').split('\n;',1)
    # Strip '# ' from comments
    message_comment = message_comment.lstrip('# ')
    message_id, message_str = message_text.split('\n',1)
    # Strip ';' from msgid
    message_id = message_id.lstrip(';')
    potentry = polib.POEntry(
      msgctxt = message_comment,
      msgid = message_id.decode('utf-8'),
      msgstr = message_str.decode('utf-8'),
	  occurrences=[(langfile,'')]
	  )
    po.append(potentry)
  messagetemplate='\n\n;.*?\n\n'
  mpattern=re.compile(messagetemplate,re.DOTALL)
  for mblock in mpattern.findall(text):
    message_id, message_str = mblock.strip('\n').split('\n',1)
    # Strip ';' from msgid
    message_id = message_id.lstrip(';')
    potentry = polib.POEntry(
      msgid = message_id.decode('utf-8'),
      msgstr = message_str.decode('utf-8'),
	  occurrences=[(langfile,'')]
	  )
    po.append(potentry)
  if text[0] == ';':
    message_id, message_str = text.partition('\n\n')[0].strip('\n').split('\n',1)
    # Strip ';' from msgid
    message_id = message_id.lstrip(';')
    potentry = polib.POEntry(
      msgid = message_id.decode('utf-8'),
      msgstr = message_str.decode('utf-8'),
	  occurrences=[(langfile,'')]
	  )
    po.append(potentry)
  pofilename = langfilename + '/po/' + lang_code + '.po'
  po.save(pofilename)