Fix installer with downscope disabled

Installer.py

@@ -186,7 +186,7 @@ def CLI():
 
     parser = argparse.ArgumentParser(prog='Aixcellenz CI Driver Installer')
     add_parameters(parser, parameters['global'])
-    subparsers = parser.add_subparsers(help='sub-command help')
+    subparsers = parser.add_subparsers(dest='cmd_name', help='sub-command help')
 
     for cmd in subcommands:
         subcmd_parser = subparsers.add_parser(cmd, help=f'{cmd} help', aliases=subcommands[cmd]['aliases'])
@@ -200,10 +200,14 @@ def CLI():
     args_to_expand = ['runner_install_path', 'shell_installation', 'mapping_path',
                       'public_key_path', 'key_path', 'log_path', 'rt_utility_path']
     for arg in args_to_expand:
+        try:
             vars(ret)[arg] = os.path.expandvars(os.path.expanduser(vars(ret)[arg]))
             if not os.path.isabs(vars(ret)[arg]):
                 vars(ret)[arg] = os.path.join(ret.install_path, vars(ret)[arg])
+        except KeyError as _:
+            pass
 
+    if ret.cmd_name == 'install':
         ret.shell_file = os.path.expandvars(os.path.expanduser(ret.shell_file))
         if not os.path.isabs(ret.shell_file):
             ret.shell_file = os.path.join(ret.rt_utility_path, ret.shell_file)
@@ -275,6 +279,7 @@ def install():
     with open(args.shell_file, "a") as shell_fp:
         shell_fp.writelines(f"export PATH=$PATH:{_runner_install_path}\n")
 
+    if args.downscope:
         set_utility_permissions(_runner_install_path, ['gitlab-runner'])
         set_utility_permissions(args.rt_utility_path)