github.com/SamarSidharth/kpt@v0.0.0-20231122062228-c7d747ae3ace/package-examples/tenant/ns-invariant.yaml (about) 1 # Copyright 2022 The kpt Authors 2 # 3 # Licensed under the Apache License, Version 2.0 (the "License"); 4 # you may not use this file except in compliance with the License. 5 # You may obtain a copy of the License at 6 # 7 # http://www.apache.org/licenses/LICENSE-2.0 8 # 9 # Unless required by applicable law or agreed to in writing, software 10 # distributed under the License is distributed on an "AS IS" BASIS, 11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 # See the License for the specific language governing permissions and 13 # limitations under the License. 14 15 apiVersion: fn.kpt.dev/v1alpha1 16 kind: StarlarkRun 17 metadata: 18 name: ns-invariant 19 source: | 20 def ensure_one_namespace(resource_list): 21 num_ns = 0 22 for resource in resource_list["items"]: 23 if resource["apiVersion"] == "v1" and resource["kind"] == "Namespace": 24 num_ns++ 25 # only one namespace is allowed 26 if num_ns > 1: 27 fail("pkg must contain single namespace") 28 29 ensure_one_namespace(ctx.resource_list)