share/qt/extract_strings_qt.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2012-2016 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5 '''
   6 Extract _("...") strings for translation and convert to Qt stringdefs so that
   7 they can be picked up by Qt linguist.
   8 '''
   9 from __future__ import division,print_function,unicode_literals
  10 from subprocess import Popen, PIPE
  11 import operator
  12 import os
  13 import sys
  14
  15 OUT_CPP="qt/bitcoinstrings.cpp"
  16 EMPTY=['""']
  17
  18 def parse_po(text):
  19     """
  20     Parse 'po' format produced by xgettext.
  21     Return a list of (msgid,msgstr) tuples.
  22     """
  23     messages = []
  24     msgid = []
  25     msgstr = []
  26     in_msgid = False
  27     in_msgstr = False
  28
  29     for line in text.split('\n'):
  30         line = line.rstrip('\r')
  31         if line.startswith('msgid '):
  32             if in_msgstr:
  33                 messages.append((msgid, msgstr))
  34                 in_msgstr = False
  35             # message start
  36             in_msgid = True
  37
  38             msgid = [line[6:]]
  39         elif line.startswith('msgstr '):
  40             in_msgid = False
  41             in_msgstr = True
  42             msgstr = [line[7:]]
  43         elif line.startswith('"'):
  44             if in_msgid:
  45                 msgid.append(line)
  46             if in_msgstr:
  47                 msgstr.append(line)
  48
  49     if in_msgstr:
  50         messages.append((msgid, msgstr))
  51
  52     return messages
  53
  54 files = sys.argv[1:]
  55
  56 # xgettext -n --keyword=_ $FILES
  57 XGETTEXT=os.getenv('XGETTEXT', 'xgettext')
  58 if not XGETTEXT:
  59     print('Cannot extract strings: xgettext utility is not installed or not configured.',file=sys.stderr)
  60     print('Please install package "gettext" and re-run \'./configure\'.',file=sys.stderr)
  61     exit(1)
  62 child = Popen([XGETTEXT,'--output=-','-n','--keyword=_'] + files, stdout=PIPE)
  63 (out, err) = child.communicate()
  64
  65 messages = parse_po(out.decode('utf-8'))
  66
  67 f = open(OUT_CPP, 'w')
  68 f.write("""
  69
  70 #include <QtGlobal>
  71
  72 // Automatically generated by extract_strings_qt.py
  73 #ifdef __GNUC__
  74 #define UNUSED __attribute__((unused))
  75 #else
  76 #define UNUSED
  77 #endif
  78 """)
  79 f.write('static const char UNUSED *bitcoin_strings[] = {\n')
  80 f.write('QT_TRANSLATE_NOOP("bitcoin-core", "%s"),\n' % (os.getenv('PACKAGE_NAME'),))
  81 f.write('QT_TRANSLATE_NOOP("bitcoin-core", "%s"),\n' % (os.getenv('COPYRIGHT_HOLDERS'),))
  82 if os.getenv('COPYRIGHT_HOLDERS_SUBSTITUTION') != os.getenv('PACKAGE_NAME'):
  83     f.write('QT_TRANSLATE_NOOP("bitcoin-core", "%s"),\n' % (os.getenv('COPYRIGHT_HOLDERS_SUBSTITUTION'),))
  84 messages.sort(key=operator.itemgetter(0))
  85 for (msgid, msgstr) in messages:
  86     if msgid != EMPTY:
  87         f.write('QT_TRANSLATE_NOOP("bitcoin-core", %s),\n' % ('\n'.join(msgid)))
  88 f.write('};\n')
  89 f.close()