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/*
Copyright 2025 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package flag
import (
"github.com/spf13/pflag"
)
// TrackerValue wraps a non-boolean value and stores true in the provided boolean when it is set.
type TrackerValue struct {
value pflag.Value
provided *bool
}
// BoolTrackerValue wraps a boolean value and stores true in the provided boolean when it is set.
type BoolTrackerValue struct {
boolValue
provided *bool
}
type boolValue interface {
pflag.Value
IsBoolFlag() bool
}
var _ pflag.Value = &TrackerValue{}
var _ boolValue = &BoolTrackerValue{}
// NewTracker returns a Value wrapping the given value which stores true in the provided boolean when it is set.
func NewTracker(value pflag.Value, provided *bool) pflag.Value {
if value == nil {
panic("value must not be nil")
}
if provided == nil {
panic("provided boolean must not be nil")
}
if boolValue, ok := value.(boolValue); ok {
return &BoolTrackerValue{boolValue: boolValue, provided: provided}
}
return &TrackerValue{value: value, provided: provided}
}
func (f *TrackerValue) String() string {
return f.value.String()
}
func (f *TrackerValue) Set(value string) error {
err := f.value.Set(value)
if err == nil {
*f.provided = true
}
return err
}
func (f *TrackerValue) Type() string {
return f.value.Type()
}
func (f *BoolTrackerValue) Set(value string) error {
err := f.boolValue.Set(value)
if err == nil {
*f.provided = true
}
return err
}
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