go でmapや配列等を pretty print (var_dumpみたいな何か)と yaml の読み込み

yamlは、https://godoc.org/launchpad.net/goyaml を、
pretty printは http://godoc.org/github.com/kr/pretty を使えばいい感じです。

config

mail_from: [e-mail]
to: [[e-mail]]
var:
  c: 2
  d: [3, 4]

example.go

    m := make(map[interface{}]interface{})
    err = goyaml.Unmarshal([]byte(config), &m)
    if err != nil {
        panic(err)
    }
    //fmt.Printf("--- m:\n%# v\n\n", m)
    pretty.Printf("--- m:\n%# v\n\n", m)

$ go run main.go
--- m:
map[interface {}]interface {}{
    "mail_from": "[e-mail]",
    "to":        []interface {}{
        "[e-mail]",
    },
    "var": map[interface {}]interface {}{
        "c": int(2),
        "d": []interface {}{
            int(3),
            int(4),
        },
    },
}