Parse time.Duration with gcfg

duration.go

package main

import (
	"fmt"
	"log"
	"time"

	"code.google.com/p/gcfg"
)

type duration struct {
	time.Duration
}

func (d *duration) UnmarshalText(text []byte) error {
	var err error
	d.Duration, err = time.ParseDuration(string(text))
	return err
}

func main() {
	cfgStr := `; Comment line
[section]
interval=10s # comment`

	cfg := struct {
		Section struct {
			Interval duration
		}
	}{}

	err := gcfg.ReadStringInto(&cfg, cfgStr)
	if err != nil {
		log.Fatalf("Failed to parse gcfg data: %s", err)
	}

	fmt.Println(cfg.Section.Interval.Duration)
}

output-correct

⧰ go run duration.go 
10s

output-incorrect

⧰ go run duration.go
2016/03/10 09:48:26 Failed to parse gcfg data: time: unknown unit ss in duration 10ss
exit status 1