pkg/util/flagext/stringslicecsv.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 flagext

import "strings"

// StringSliceCSV is a slice of strings that is parsed from a comma-separated string
// It implements flag.Value and yaml Marshalers
type StringSliceCSV []string

// String implements flag.Value
func (v StringSliceCSV) String() string {
	return strings.Join(v, ",")
}

// Set implements flag.Value
func (v *StringSliceCSV) Set(s string) error {
	*v = strings.Split(s, ",")
	return nil
}

// UnmarshalYAML implements yaml.Unmarshaler.
func (v *StringSliceCSV) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var s string
	if err := unmarshal(&s); err != nil {
		return err
	}

	return v.Set(s)
}

// MarshalYAML implements yaml.Marshaler.
func (v StringSliceCSV) MarshalYAML() (interface{}, error) {
	return v.String(), nil
}