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imagepullpolicy.go
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imagepullpolicy.go
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// Copyright 2021 The kpt Authors
//
// 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 fnruntime
import (
"fmt"
"strings"
"github.com/spf13/pflag"
)
type ImagePullPolicy string
const (
AlwaysPull ImagePullPolicy = "Always"
IfNotPresentPull ImagePullPolicy = "IfNotPresent"
NeverPull ImagePullPolicy = "Never"
)
var allImagePullPolicy = []ImagePullPolicy{
AlwaysPull,
IfNotPresentPull,
NeverPull,
}
// ImagePullPolicy can be used in pflag
var _ pflag.Value = ((*ImagePullPolicy)(nil))
// String implements pflag.Value and fmt.Stringer
func (e *ImagePullPolicy) String() string {
return string(*e)
}
// Set implements pflag.Value
func (e *ImagePullPolicy) Set(v string) error {
l := strings.ToLower(v)
for _, c := range allImagePullPolicy {
s := strings.ToLower(string(c))
if s == l {
*e = c
return nil
}
}
return fmt.Errorf("must must be one of " + strings.Join(e.AllStrings(), ", "))
}
func (e *ImagePullPolicy) AllStrings() []string {
var allStrings []string
for _, c := range allImagePullPolicy {
allStrings = append(allStrings, string(c))
}
return allStrings
}
// HelpAllowedValues builds help text for the allowed values
func (e *ImagePullPolicy) HelpAllowedValues() string {
return "(one of " + strings.Join(e.AllStrings(), ", ") + ")"
}
// Type implements pflag.Value
func (e *ImagePullPolicy) Type() string {
return "ImagePullPolicy"
}