reformat yml files

yml.go

package main

import (
	"io/ioutil"
	"os"

	"gopkg.in/yaml.v2"
)

func main() {
	for _, f := range os.Args[1:] {
		b, err := ioutil.ReadFile(f)
		if err != nil {
			panic(err)
		}

		var o interface{}
		if err := yaml.Unmarshal(b, &o); err != nil {
			panic(err)
		}

		nb, err := yaml.Marshal(o)
		if err != nil {
			panic(err)
		}

		if err := ioutil.WriteFile(f, nb, os.ModePerm); err != nil {
			panic(err)
		}
	}
}