A script for adding translation fields to po files and add the translations from po files to .libretro descriptor files

libretropo.py

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

directory = '.'
directory = directory.rstrip ('/')

if (directory != '') and (os.path.isdir (directory) == False):
    sys.exit('Specified directory does not exist')

# Find all libretro files
files = []
for rootdir, dirnames, filenames in os.walk (directory):
    files.extend (glob.glob (rootdir + '/*.libretro'))

# Define Templates and po directory name
messagetemplate = '(?<=\n)(FirmwareName=.*?\n)'
mpattern=re.compile (messagetemplate, re.DOTALL)
translationtemplate = '(?<=\n)(FirmwareName\[.*?\n)'
tpattern=re.compile (translationtemplate, re.DOTALL)
podir = 'po-libretro-cores/'

# Write POT file
pot = polib.POFile('', check_for_duplicates = True)
potcreationtime = strftime('%Y-%m-%d %H:%M%z')
pot.metadata = {
  'Project-Id-Version': 'gnome-games',
  'Report-Msgid-Bugs-To': '',
  'POT-Creation-Date': potcreationtime,
  'PO-Revision-Date': 'YEAR-MO-DA HO:MI+ZONE',
  'Last-Translator': 'FULL NAME <EMAIL@ADDRESS>',
  'Language-Team': 'LANGUAGE <LL@li.org>',
  'MIME-Version': '1.0',
  'Content-Type': 'text/plain; charset=UTF-8',
  'Content-Transfer-Encoding': '8bit',
  }
for langfile in files:
  langfiledir = langfile.replace('.libretro', '')
  langfilename = langfiledir.rpartition('/')[2]
  # Create localization directories if needed
  try:
    os.makedirs(podir)
  except OSError as e:
    if e.errno != errno.EEXIST:
        raise
  #open desktop file
  text = open (langfile, 'r').read ()

  # Parse contents and add them to POT
  for mblock in mpattern.findall(text):
    mblock_stripped = mblock.strip ('\n')
    message_comment, message_id = mblock.strip ('\n').split ('=')
    potentry = polib.POEntry (
      msgctxt = message_comment,
      msgid = message_id,
      msgstr = '',
      occurrences = [(langfile, '')]
      )
    if message_id != '':
      try:
        pot.append (potentry)
      except ValueError:
        print('The entry already exists')

#Create po files from LINGUAS
linguas = 'po-libretro-cores/LINGUAS'
if os.path.exists (linguas):
  with open (linguas) as linguas_file:
    pofiles = []
    for line in linguas_file.readlines ():
      if '#' not in line:
        pofiles.append (line.split ('\n')[0] + '.po')
        print (pofiles)
    for pofile in pofiles:
      pofile_path = os.path.join (podir, pofile)
      if not os.path.exists (pofile_path):
        with open (pofile_path, 'w') as new_pofile:
          pass

# Merge translations
for pofile in glob.glob (podir + '/*.po'):
  lang = pofile[:-3].rsplit ('/', 1)[1]
  pofilename = pofile
  po = polib.pofile (pofilename)
  if not po.metadata:
    po.metadata = pot.metadata
  po.merge (pot)
  po.save (pofilename)

for langfile in files:
  #open desktop file
  deskfile = open (langfile, 'r')
  text = deskfile.read ()
  deskfile.close ()
  deskfile = open (langfile, 'w')
  for transblock in tpattern.findall (text):
    text = text.replace (transblock, '')

  # Parse PO files
  for pofile in sorted (glob.glob (podir + '/*.po'), reverse = True):
    lang = pofile[:-3].rsplit ('/', 1)[1]
    pofilename = pofile
    po = polib.pofile (pofilename)
    for entry in po.translated_entries ():
      if entry.msgid in text:
        origmessage = '\n' + entry.msgctxt + '=' + entry.msgid + '\n'
        origandtranslated = '\n' + entry.msgctxt + '=' + entry.msgid + '\n' + entry.msgctxt + '[' + lang + ']=' + entry.msgstr + '\n'
        text = text.replace (origmessage, origandtranslated)

  deskfile.write (text)
  deskfile.close ()