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#!/usr/bin/python
'''
Extract _("...") strings for translation and convert to Qt4 stringdefs so that
they can be picked up by Qt linguist.
'''
from subprocess import Popen, PIPE
import glob
import operator
import os
OUT_CPP="src/qt/bitcoinstrings.cpp"
EMPTY=['""']
def parse_po(text):
"""
Parse 'po' format produced by xgettext.
Return a list of (msgid,msgstr) tuples.
"""
messages = []
msgid = []
msgstr = []
in_msgid = False
in_msgstr = False
for line in text.split('\n'):
line = line.rstrip('\r')
if line.startswith('msgid '):
if in_msgstr:
messages.append((msgid, msgstr))
in_msgstr = False
# message start
in_msgid = True
msgid = [line[6:]]
elif line.startswith('msgstr '):
in_msgid = False
in_msgstr = True
msgstr = [line[7:]]
elif line.startswith('"'):
if in_msgid:
msgid.append(line)
if in_msgstr:
msgstr.append(line)
if in_msgstr:
messages.append((msgid, msgstr))
return messages
files = glob.glob('src/*.cpp') + glob.glob('src/*.h')
# xgettext -n --keyword=_ $FILES
XGETTEXT=os.getenv('XGETTEXT', 'xgettext')
child = Popen([XGETTEXT,'--output=-','-n','--keyword=_'] + files, stdout=PIPE)
(out, err) = child.communicate()
messages = parse_po(out)
f = open(OUT_CPP, 'w')
f.write("""
#include <QtGlobal>
// Automatically generated by extract_strings.py
#ifdef __GNUC__
#define UNUSED __attribute__((unused))
#else
#define UNUSED
#endif
""")
f.write('static const char UNUSED *bitcoin_strings[] = {\n')
messages.sort(key=operator.itemgetter(0))
for (msgid, msgstr) in messages:
if msgid != EMPTY:
f.write('QT_TRANSLATE_NOOP("bitcoin-core", %s),\n' % ('\n'.join(msgid)))
f.write('};\n')
f.close()