[tools] Exclude translations for languages not yet supported by the core

Signed-off-by: Alexander Borsuk <me@alex.bio>

tools/python/translate.py

@@ -139,6 +139,26 @@ def usage():
     else:
       print('See https://www.soimort.org/translate-shell/ for installation instructions')
 
+
+# Returns a list of all languages supported by the core (search) in data/categories.txt
+def get_supported_categories_txt_languages():
+  script_dir = os.path.dirname(os.path.realpath(__file__))
+  categories_txt_path = os.path.join(script_dir, '..', '..', 'data', 'categories.txt')
+  languages = set()
+  with open(categories_txt_path) as f:
+    for line in f.readlines():
+      if not line: continue
+      if line[0] == '#': continue
+      colon_index = line.find(':')
+      # en: en-US: zh-Hant:
+      if colon_index == 2 or colon_index == 5 or colon_index == 7:
+        languages.add(line[:colon_index])
+
+  # Convert to list.
+  languages = list(languages)
+  languages.sort()
+  return languages
+
 if __name__ == '__main__':
   if len(sys.argv) < 2:
     usage()
@@ -172,9 +192,17 @@ if __name__ == '__main__':
   langs = list(translations.keys())
   langs.sort()
 
+  categories_txt_languages = get_supported_categories_txt_languages()
+  absent_in_categories_txt = [item for item in langs if item not in categories_txt_languages]
   print('============ categories.txt format ============')
+  if len(absent_in_categories_txt) > 0:
+    print('\nWARNING: The following translations are not supported yet in the categories.txt and are skipped:')
+    print(absent_in_categories_txt)
+    print('See indexer/categories_holder.hpp for details.\n')
   print('en:' + en)
   for lang in langs:
+    if lang in absent_in_categories_txt:
+      continue
     print(lang + ':' + translations[lang])
 
   print('============ strings.txt format ============')