1 /* 2 Copyright 2015 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package env 18 19 import ( 20 "os" 21 "strconv" 22 ) 23 24 // GetString returns the env variable for the given key 25 // and falls back to the given defaultValue if not set 26 func GetString(key, defaultValue string) string { 27 v, ok := os.LookupEnv(key) 28 if ok { 29 return v 30 } 31 return defaultValue 32 } 33 34 // GetInt returns the env variable (parsed as integer) for 35 // the given key and falls back to the given defaultValue if not set 36 func GetInt(key string, defaultValue int) (int, error) { 37 v, ok := os.LookupEnv(key) 38 if ok { 39 value, err := strconv.Atoi(v) 40 if err != nil { 41 return defaultValue, err 42 } 43 return value, nil 44 } 45 return defaultValue, nil 46 } 47 48 // GetFloat64 returns the env variable (parsed as float64) for 49 // the given key and falls back to the given defaultValue if not set 50 func GetFloat64(key string, defaultValue float64) (float64, error) { 51 v, ok := os.LookupEnv(key) 52 if ok { 53 value, err := strconv.ParseFloat(v, 64) 54 if err != nil { 55 return defaultValue, err 56 } 57 return value, nil 58 } 59 return defaultValue, nil 60 } 61 62 // GetBool returns the env variable (parsed as bool) for 63 // the given key and falls back to the given defaultValue if not set 64 func GetBool(key string, defaultValue bool) (bool, error) { 65 v, ok := os.LookupEnv(key) 66 if ok { 67 value, err := strconv.ParseBool(v) 68 if err != nil { 69 return defaultValue, err 70 } 71 return value, nil 72 } 73 return defaultValue, nil 74 } 75