cli: [list-permissions] backward compatibility for getUserPermsInheritance call

fixes: #3959

cli/koji_cli/commands.py

@@ -2176,11 +2176,21 @@ def handle_list_permissions(goptions, session, args):
         user = session.getUser(options.user)
         if not user:
             error("No such user: %s" % options.user)
-        for p, groups in session.getUserPermsInheritance(user['id']).items():
-            p = {'name': p}
-            if groups != [None]:
-                p['description'] = 'inherited from: %s' % ', '.join(groups)
-            perms.append(p)
+        try:
+            for p, groups in session.getUserPermsInheritance(user['id']).items():
+                p = {'name': p}
+                if groups != [None]:
+                    p['description'] = 'inherited from: %s' % ', '.join(groups)
+                perms.append(p)
+        except koji.GenericError as e:
+            # backwards compatible
+            # TODO: can be removed in 1.36
+            if "Invalid method" in str(e):
+                warn("Old hub doesn't support Inherited Group Permissions.")
+                for p in session.getUserPerms(user['id']):
+                    perms.append({'name': p})
+            else:
+                raise
     else:
         for p in session.getAllPerms():
             perms.append({'name': p['name'], 'description': p['description']})

tests/test_cli/test_list_permissions.py

@@ -3,6 +3,7 @@ import mock
 import six
 import unittest
 
+import koji
 from koji_cli.commands import handle_list_permissions
 from . import utils
 
@@ -133,6 +134,27 @@ repo
         self.session.getPerms.assert_not_called()
         self.session.getAllPerms.assert_not_called()
 
+    @mock.patch('sys.stdout', new_callable=six.StringIO)
+    def test_handle_list_permissions_without_group_perm_inheritance(self, stdout):
+        """Test handle_list_permissions without group perm inheritance"""
+        expected = """build             
+repo              
+"""
+        self.session.getLoggedInUser.return_value = {'id': 1, 'name': 'user'}
+        self.session.getUserPermsInheritance.side_effect = koji.GenericError(
+            "Invalid method: getUserPermsInheritance"
+        )
+        self.session.getUserPerms.return_value = [p['name'] for p in self.all_perms[1:3]]
+        handle_list_permissions(self.options, self.session, ['--mine'])
+        self.assert_console_message(stdout, expected)
+
+        self.activate_session_mock.assert_called_once()
+        self.session.getUser.assert_called_once()
+        self.session.getUserPermsInheritance.assert_called_once()
+        self.session.getUserPerms.assert_called_once()
+        self.session.getPerms.assert_not_called()
+        self.session.getAllPerms.assert_not_called()
+
     @mock.patch('sys.stdout', new_callable=six.StringIO)
     def test_handle_list_permissions_all_perms_quiet_false(self, stdout):
         """Test handle_list_permissions all permissions and quiet is false"""