49 lines
940 B
Go
49 lines
940 B
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/caarlos0/env"
|
|
)
|
|
|
|
type config struct {
|
|
Home string `env:"HOME"`
|
|
Port int `env:"PORT" envDefault:"3000"`
|
|
IsProduction bool `env:"PRODUCTION"`
|
|
Hosts []string `env:"HOSTS" envSeparator:":"`
|
|
Duration time.Duration `env:"DURATION"`
|
|
ExampleFoo Foo `env:"EXAMPLE_FOO"`
|
|
}
|
|
|
|
type Foo struct {
|
|
Name string
|
|
}
|
|
|
|
func main() {
|
|
cfg := config{}
|
|
|
|
// Parse for built-in types
|
|
if err := env.Parse(&cfg); err != nil {
|
|
log.Fatal("Unable to parse envs: ", err)
|
|
}
|
|
|
|
// OR w/ a custom parser for `Foo`
|
|
//
|
|
// if err := env.ParseWithFuncs(&cfg, env.CustomParsers{
|
|
// reflect.TypeOf(Foo{}): fooParser,
|
|
// }); err != nil {
|
|
// log.Fatal("Unable to parse envs: ", err)
|
|
// }
|
|
|
|
fmt.Printf("%+v\n", cfg)
|
|
}
|
|
|
|
func fooParser(value string) (interface{}, error) {
|
|
return Foo{
|
|
Name: strings.ToUpper(value),
|
|
}, nil
|
|
}
|