k8s.io/client-go@v0.31.1/tools/clientcmd/flag.go (about)

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package clientcmd
    18  
    19  // transformingStringValue implements pflag.Value to store string values,
    20  // allowing transforming them while being set
    21  type transformingStringValue struct {
    22  	target      *string
    23  	transformer func(string) (string, error)
    24  }
    25  
    26  func newTransformingStringValue(val string, target *string, transformer func(string) (string, error)) *transformingStringValue {
    27  	*target = val
    28  	return &transformingStringValue{
    29  		target:      target,
    30  		transformer: transformer,
    31  	}
    32  }
    33  
    34  func (t *transformingStringValue) Set(val string) error {
    35  	val, err := t.transformer(val)
    36  	if err != nil {
    37  		return err
    38  	}
    39  	*t.target = val
    40  	return nil
    41  }
    42  
    43  func (t *transformingStringValue) Type() string {
    44  	return "string"
    45  }
    46  
    47  func (t *transformingStringValue) String() string {
    48  	return string(*t.target)
    49  }