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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package main
import "strconv"
// boolFlag is a flag.Value that tracks whether it was ever set.
type boolFlag struct {
set bool
v bool
}
func (b *boolFlag) String() string {
if b == nil || !b.set {
return "unset"
}
return strconv.FormatBool(b.v)
}
func (b *boolFlag) Set(s string) error {
v, err := strconv.ParseBool(s)
if err != nil {
return err
}
b.v = v
b.set = true
return nil
}
func (b *boolFlag) IsBoolFlag() bool { return true }
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