github.com/yogeshkumararora/slsa-github-generator@v1.10.1-0.20240520161934-11278bd5afb4/internal/utils/marshal.go (about) 1 // Copyright 2022 SLSA 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 utils 16 17 import ( 18 "encoding/base64" 19 "encoding/json" 20 "fmt" 21 ) 22 23 // UnmarshalList unmarshals a string into a list of strings. 24 func UnmarshalList(arg string) ([]string, error) { 25 var res []string 26 // If argument is empty, return an empty list early, 27 // because `json.Unmarshal` would fail. 28 if arg == "" { 29 return res, nil 30 } 31 32 cs, err := base64.StdEncoding.DecodeString(arg) 33 if err != nil { 34 return res, fmt.Errorf("base64.StdEncoding.DecodeString: %w", err) 35 } 36 37 if err := json.Unmarshal(cs, &res); err != nil { 38 return []string{}, fmt.Errorf("json.Unmarshal: %w", err) 39 } 40 return res, nil 41 } 42 43 // MarshalToString marshals to a string. 44 func MarshalToString(args interface{}) (string, error) { 45 jsonData, err := json.Marshal(args) 46 if err != nil { 47 return "", fmt.Errorf("json.Marshal: %w", err) 48 } 49 50 encoded := base64.StdEncoding.EncodeToString(jsonData) 51 if err != nil { 52 return "", fmt.Errorf("base64.StdEncoding.EncodeString: %w", err) 53 } 54 return encoded, nil 55 } 56 57 // MarshalToBytes marshals to a byte array. 58 func MarshalToBytes(args interface{}) ([]byte, error) { 59 encoded, err := MarshalToString(args) 60 if err != nil { 61 return nil, err 62 } 63 return []byte(encoded), nil 64 }