github.com/felipejfc/helm@v2.1.2+incompatible/pkg/storage/driver/labels.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors All rights reserved.
     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 driver
    18  
    19  import (
    20  	"bytes"
    21  	"fmt"
    22  	"io"
    23  )
    24  
    25  // labels is a map of key value pairs to be included as metadata in a configmap object.
    26  type labels map[string]string
    27  
    28  func (lbs *labels) init()                { *lbs = labels(make(map[string]string)) }
    29  func (lbs labels) get(key string) string { return lbs[key] }
    30  func (lbs labels) set(key, val string)   { lbs[key] = val }
    31  
    32  func (lbs labels) keys() (ls []string) {
    33  	for key := range lbs {
    34  		ls = append(ls, key)
    35  	}
    36  	return
    37  }
    38  
    39  func (lbs labels) match(set labels) bool {
    40  	for _, key := range set.keys() {
    41  		if lbs.get(key) != set.get(key) {
    42  			return false
    43  		}
    44  	}
    45  	return true
    46  }
    47  
    48  func (lbs labels) toMap() map[string]string { return lbs }
    49  
    50  func (lbs *labels) fromMap(kvs map[string]string) {
    51  	for k, v := range kvs {
    52  		lbs.set(k, v)
    53  	}
    54  }
    55  
    56  func (lbs labels) dump(w io.Writer) error {
    57  	var b bytes.Buffer
    58  
    59  	fmt.Fprintln(&b, "labels:")
    60  	for k, v := range lbs {
    61  		fmt.Fprintf(&b, "\t- %q -> %q\n", k, v)
    62  	}
    63  
    64  	_, err := w.Write(b.Bytes())
    65  	return err
    66  }