early check if it was called as non-root user

tljh/config.py

@@ -219,6 +219,10 @@ def _is_list(item):
 
 
 def main(argv=None):
+    if os.geteuid() != 0:
+        print("Perhaps you didn't use `sudo -E`?")
+        raise(SystemExit)
+
     if argv is None:
         argv = sys.argv[1:]
 
@@ -295,7 +299,6 @@ def main(argv=None):
 
     args = argparser.parse_args(argv)
 
-    try:
     if args.action == 'show':
         show_config(args.config_path)
     elif args.action == 'set':
@@ -308,9 +311,6 @@ def main(argv=None):
         reload_component(args.component)
     else:
         argparser.print_help()
-    except Exception as e:
-        print(str(e))
-        print("Perhaps you didn't use `sudo -E`?")
 
 
 if __name__ == '__main__':