github.com/GoogleContainerTools/kpt@v1.0.0-beta.50.0.20240520170205-c25345ffcbee/pkg/debug/formatter.go (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 package debug 16 17 import ( 18 "encoding/json" 19 "fmt" 20 ) 21 22 // DeferredJSON is a helper that delays JSON formatting until/unless it is needed. 23 type DeferredJSON struct { 24 O interface{} 25 } 26 27 // String is the method that is called to format the object. 28 func (d DeferredJSON) String() string { 29 b, err := json.Marshal(d.O) 30 if err != nil { 31 return fmt.Sprintf("<error: %v>", err) 32 } 33 return string(b) 34 } 35 36 // JSON is a helper that prints the object in JSON format. 37 // We use lazy-evaluation to avoid calling json.Marshal unless it is actually needed. 38 func JSON(o interface{}) DeferredJSON { 39 return DeferredJSON{o} 40 }