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