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name.go
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/
name.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 stages
import (
"fmt"
)
// Name is used to identify a StageCreator (which instantiates the stage of
// the same name) from the command line. It must be in the set of registered
// stages.
type Name string
func (s Name) String() string {
return string(s)
}
func (s *Name) Set(val string) error {
if stage := Get(val); stage == nil {
return fmt.Errorf("%s is not a valid stage", val)
}
*s = Name(val)
return nil
}