make_locale.py

''' This script constructs the language resources we need. '''
import re
import glob
import os

UUID = "ProxySwitcher@flannaghan.com"

def get_network_settings_translations():
    ''' Read the network settings translations for all languages. '''
    infile = "lang-resources/gnome-network-panel.desktop"
    with open(infile, 'r') as f:
        fdata = f.read()
        return dict(re.findall("^Comment\[(.*)\]=(.*)$", fdata,
                               flags=re.MULTILINE))

def get_control_center_translations(lang):
    ''' Read the control center translations for a given language. '''
    infile = "lang-resources/po-gnome-control-center/{}.po".format(lang)
    with open(infile, 'r') as f:
        fdata = f.read()

    pattern = 'msgid "([^"]*)"\nmsgstr "([^"]*)"\n'
    raw_translations = re.findall(pattern, fdata, flags=re.MULTILINE)
    raw_translations = dict(raw_translations)
    translations = {}
    for k in ['Off', 'Manual', 'Automatic', 'Proxy']:
        translation = raw_translations.get(k)
        if translation is None:
            print("No translation for {} in {}".format(k, lang))
            translations[k] = k
        elif translation == "":
            # Empty translation string => use key text.
            translations[k] = k
        else:
            translations[k] = translation
    return translations

def make_all_po_files():
    ''' Populates the directory po. '''
    # create the target if necessary.
    if not os.path.exists('po'):
        os.makedirs('po')

    # all po files are based on templates
    with open("po.template", 'r') as f:
        template = f.read()

    # load translations and fill in the template, saving to po files.
    network_settings = get_network_settings_translations()
    for f in glob.glob("lang-resources/po-gnome-control-center/*.po"):
        lang = os.path.basename(f).rsplit(".", 1)[0]
        translations = get_control_center_translations(lang)
        translations['Network Settings'] = network_settings.get(
            lang, 'Network Settings')

        filename = "po/{}.po".format(lang)
        print("writing {}".format(filename))
        with open(filename, 'w') as f:
            po = template
            for key, value in translations.items():
                po = po.replace('{{' + key + '}}', value)
            f.write(po)

def make_locale():
    ''' Constructs the locale. '''
    make_all_po_files()
    for po in glob.glob("po/*.po"):
        lang = os.path.basename(po).rsplit('.', 1)[0]
        cmd = "mkdir -p locale/{0}/LC_MESSAGES; msgfmt {1} -o locale/{0}/LC_MESSAGES/{2}.mo".format(lang, po, UUID)
        print(cmd)
        os.system(cmd)

if __name__ == '__main__':
    make_locale()