utils/i18n: factor out apply_translations() (#1407)

so windows can use it from build.py easily

Author: dumbmoron

utils/i18n_apply.py

@@ -184,28 +184,32 @@ def apply_language(task):
     print(f'{lang_code}: applied {total} translations to {len(by_xtb)} XTB files')
 
 
-def main():
-    """CLI entrypoint"""
-    parser = argparse.ArgumentParser(description='Apply i18n translations to Chromium XTB files')
-    parser.add_argument('-t',
-                        '--tree',
-                        type=Path,
-                        required=True,
-                        help='Path to Chromium source tree')
-    args = parser.parse_args()
-
+def apply_translations(tree):
+    """Applies all translations to all relevant .xtb files"""
     with open(SOURCE_PATH, encoding='utf-8') as file:
         source = json.load(file)
     with open(I18N_DIR / 'languages.json', encoding='utf-8') as file:
         languages = json.load(file)
 
-    namesub.add_grit_to_path(args.tree)
-    xtb_index = build_xtb_index(source, args.tree)
+    namesub.add_grit_to_path(tree)
+    xtb_index = build_xtb_index(source, tree)
 
     tasks = [(code, source, xtb_index) for code in languages]
     with Pool() as pool:
         pool.map(apply_language, tasks)
 
 
+def main():
+    """CLI entrypoint"""
+    parser = argparse.ArgumentParser(description='Apply i18n translations to Chromium XTB files')
+    parser.add_argument('-t',
+                        '--tree',
+                        type=Path,
+                        required=True,
+                        help='Path to Chromium source tree')
+    args = parser.parse_args()
+    apply_translations(args.tree)
+
+
 if __name__ == '__main__':
     sys.exit(main())