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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| // Copyright (c) 2016-2021, Jan Cajthaml <jan.cajthaml@gmail.com> | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package env | ||
|
|
||
| import ( | ||
| "encoding/hex" | ||
| "io/ioutil" | ||
| "os" | ||
| "path/filepath" | ||
| "time" | ||
| ) | ||
|
|
||
| // Get retrieves the string value of the environment variable named by the key | ||
| func Get(key string) (string, bool) { | ||
| if v := os.Getenv(key); v != "" { | ||
| return v, true | ||
| } | ||
| return "", false | ||
| } | ||
|
|
||
| // String retrieves the string value from environment named by the key. | ||
| func String(key string, fallback string) string { | ||
| if str, exists := Get(key); exists { | ||
| return str | ||
| } | ||
| return fallback | ||
| } | ||
|
|
||
| // Duration retrieves duration value from the environment. | ||
| func Duration(key string, fallback time.Duration) time.Duration { | ||
| if str, exists := Get(key); exists { | ||
| v, err := time.ParseDuration(str) | ||
| if err != nil { | ||
| log.Warn().Msgf("invalid value in %s, using fallback", key) | ||
| return fallback | ||
| } | ||
| return v | ||
| } | ||
| return fallback | ||
| } | ||
|
|
||
| // HexFile retrieves bytes value from hexfile path defined from the environment. | ||
| func HexFile(key string, fallback []byte) []byte { | ||
| if str, exists := Get(key); exists { | ||
| data, err := ioutil.ReadFile(filepath.Clean(str)) | ||
| if err != nil { | ||
| log.Warn().Msgf("invalid value in %s, using fallback", key) | ||
| return fallback | ||
| } | ||
| if len(data) == 0 { | ||
| log.Warn().Msgf("invalid value in %s, using fallback", key) | ||
| return fallback | ||
| } | ||
| v, err := hex.DecodeString(string(data)) | ||
| if err != nil { | ||
| log.Warn().Msgf("invalid value in %s, using fallback", key) | ||
| return fallback | ||
| } | ||
| return []byte(v) | ||
| } | ||
| return fallback | ||
| } |
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