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