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package flagutil
import (
"errors"
"fmt"
"net"
"strings"
)
// IPv4Flag parses a string into a net.IP after asserting that it
// is an IPv4 address. This type implements the flag.Value interface.
type IPv4Flag struct {
val net.IP
}
func (f *IPv4Flag) IP() net.IP {
return f.val
}
func (f *IPv4Flag) Set(v string) error {
ip := net.ParseIP(v)
if ip == nil || ip.To4() == nil {
return errors.New("not an IPv4 address")
}
f.val = ip
return nil
}
func (f *IPv4Flag) String() string {
return f.val.String()
}
// StringSliceFlag parses a comma-delimited list of strings into
// a []string. This type implements the flag.Value interface.
type StringSliceFlag []string
func (ss *StringSliceFlag) String() string {
return fmt.Sprintf("%+v", *ss)
}
func (ss *StringSliceFlag) Set(v string) error {
*ss = strings.Split(v, ",")
return nil
}
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