github.com/yrj2011/jx-test-infra@v0.0.0-20190529031832-7a2065ee98eb/prow/flagutil/flagutil.go (about)

     1  /*
     2  Copyright 2018 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 flagutil
    18  
    19  import "strings"
    20  
    21  type Strings struct {
    22  	vals    []string
    23  	beenSet bool
    24  }
    25  
    26  // NewStrings returns a Strings struct that defaults to the value of def if left
    27  // unset.
    28  func NewStrings(def ...string) Strings {
    29  	return Strings{
    30  		vals:    def,
    31  		beenSet: false,
    32  	}
    33  }
    34  
    35  func (s *Strings) Strings() []string {
    36  	return s.vals
    37  }
    38  
    39  func (s *Strings) String() string {
    40  	return strings.Join(s.vals, ",")
    41  }
    42  
    43  // Set records the value passed
    44  func (s *Strings) Set(value string) error {
    45  	if !s.beenSet {
    46  		s.beenSet = true
    47  		// Value is being set, don't use default.
    48  		s.vals = nil
    49  	}
    50  	s.vals = append(s.vals, value)
    51  	return nil
    52  }