Add initial i18n support

bin/key-mapper-gtk

@@ -24,6 +24,10 @@
 
 import sys
 import atexit
+import gettext
+import locale
+from keymapper.data import get_data_path
+import os.path
 from argparse import ArgumentParser
 
 import gi
@@ -31,10 +35,17 @@ gi.require_version('Gtk', '3.0')
 gi.require_version('GLib', '2.0')
 from gi.repository import Gtk
 
+APP_NAME = 'key-mapper'
+LOCALE_DIR = os.path.join(get_data_path(), 'lang')
+
+locale.bindtextdomain(APP_NAME, LOCALE_DIR)
+locale.textdomain(APP_NAME)
+
+
 # https://github.com/Nuitka/Nuitka/issues/607#issuecomment-650217096
 Gtk.init()
 
-from keymapper.logger import update_verbosity, log_info
+from keymapper.logger import logger, update_verbosity, log_info
 
 
 if __name__ == '__main__':
@@ -48,6 +59,7 @@ if __name__ == '__main__':
     options = parser.parse_args(sys.argv[1:])
     update_verbosity(options.debug)
     log_info('key-mapper-gtk')
+    logger.debug('Using locale directory: {}'.format(LOCALE_DIR))
 
     # import key-mapper stuff after setting the log verbosity
     from keymapper.gui.window import Window

data/key-mapper.glade

@@ -206,7 +206,7 @@ To give your keys back their original mapping.</property>
                         <property name="homogeneous">True</property>
                         <child>
                           <object class="GtkButton" id="apply_preset">
-                            <property name="label">Apply</property>
+                            <property name="label" translatable="yes">Apply</property>
                             <property name="width-request">80</property>
                             <property name="visible">True</property>
                             <property name="can-focus">True</property>
@@ -225,7 +225,7 @@ To give your keys back their original mapping.</property>
                         </child>
                         <child>
                           <object class="GtkButton" id="copy_preset">
-                            <property name="label">Copy</property>
+                            <property name="label" translatable="yes">Copy</property>
                             <property name="width-request">80</property>
                             <property name="visible">True</property>
                             <property name="can-focus">True</property>
@@ -243,7 +243,7 @@ To give your keys back their original mapping.</property>
                         </child>
                         <child>
                           <object class="GtkButton" id="create_preset">
-                            <property name="label">New</property>
+                            <property name="label" translatable="yes">New</property>
                             <property name="width-request">80</property>
                             <property name="visible">True</property>
                             <property name="can-focus">True</property>
@@ -262,7 +262,7 @@ To give your keys back their original mapping.</property>
                         </child>
                         <child>
                           <object class="GtkButton" id="delete_preset">
-                            <property name="label">Delete</property>
+                            <property name="label" translatable="yes">Delete</property>
                             <property name="width-request">80</property>
                             <property name="visible">True</property>
                             <property name="can-focus">True</property>

scripts/build.sh

@@ -16,4 +16,4 @@ build_deb() {
 build_deb &
 # add more build targets here
 
-wait
+wait

setup.py

@@ -22,10 +22,16 @@
 import glob
 import os
 import re
+import pathlib
+import subprocess
+from os.path import basename, splitext, join
 from setuptools import setup
 from setuptools.command.install import install
+from setuptools.command.build_ext import build_ext
 
 
+PO_FILES = 'po/*.po'
+
 class Install(install):
     """Add the current commit hash to logger.py."""
     def run(self):
@@ -33,6 +39,8 @@ class Install(install):
         if re.match(r'^([a-z]|[0-9])+$', commit):
             with open('keymapper/commit_hash.py', 'w') as f:
                 f.write(f"COMMIT_HASH = '{commit}'\n")
+        # generate .mo files
+        make_lang()
 
         install.run(self)
 
@@ -55,6 +63,25 @@ def get_packages():
     return result
 
 
+def make_lang():
+    mo_files = []
+    prefix = 'keymapper'
+    os.makedirs('mo', exist_ok=True)
+
+    for po_file in glob.glob(PO_FILES):
+        lang = splitext(basename(po_file))[0]
+        os.makedirs(join('mo', lang), exist_ok=True)
+        print(f'generating translation for {lang}')
+        subprocess.run(['msgfmt', '-o', join('mo', lang, 'key-mapper.mo'), str(po_file)], check=True)
+
+lang_data = []
+for po_file in glob.glob(PO_FILES):
+    lang = splitext(basename(po_file))[0]
+    lang_data.append((
+        f'/usr/share/key-mapper/lang/{lang}/LC_MESSAGES',
+        [f'mo/{lang}/key-mapper.mo']
+    ))
+
 setup(
     name='key-mapper',
     version='1.0.0',
@@ -64,8 +91,10 @@ setup(
     url='https://github.com/sezanzeb/key-mapper',
     license='GPL-3.0',
     packages=get_packages(),
+    include_package_data = True,
     data_files=[
         # see development.md#files
+        *lang_data,
         ('/usr/share/key-mapper/', glob.glob('data/*')),
         ('/usr/share/applications/', ['data/key-mapper.desktop']),
         ('/usr/share/polkit-1/actions/', ['data/key-mapper.policy']),