Created
September 23, 2022 21:33
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Generic function to load and parse environment variable in Go
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| func getEnv[T int | string | bool](str string) T { | |
| env, ok := os.LookupEnv(str) | |
| if !ok { | |
| log.Fatalf("%s environment variable required but not set", str) | |
| } | |
| var v T | |
| switch t := any(&v).(type) { | |
| case *string: | |
| *t = env | |
| case *int: | |
| i, err := strconv.Atoi(env) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| *t = int(i) | |
| case *bool: | |
| b, err := strconv.ParseBool(env) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| *t = bool(b) | |
| } | |
| return v | |
| } |
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