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77 lines
2.8 KiB
Go
77 lines
2.8 KiB
Go
/*
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Copyright 2024 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package features
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import (
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"fmt"
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clientfeatures "k8s.io/client-go/features"
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"k8s.io/component-base/featuregate"
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)
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// clientAdapter adapts a k8s.io/component-base/featuregate.MutableFeatureGate to client-go's
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// feature Gate and Registry interfaces. The component-base types Feature, FeatureSpec, and
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// prerelease, and the component-base prerelease constants, are duplicated by parallel types and
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// constants in client-go. The parallel types exist to allow the feature gate mechanism to be used
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// for client-go features without introducing a circular dependency between component-base and
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// client-go.
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type clientAdapter struct {
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mfg featuregate.MutableFeatureGate
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}
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var _ clientfeatures.Gates = &clientAdapter{}
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func (a *clientAdapter) Enabled(name clientfeatures.Feature) bool {
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return a.mfg.Enabled(featuregate.Feature(name))
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}
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var _ clientfeatures.Registry = &clientAdapter{}
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func (a *clientAdapter) Add(in map[clientfeatures.Feature]clientfeatures.FeatureSpec) error {
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out := map[featuregate.Feature]featuregate.FeatureSpec{}
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for name, spec := range in {
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converted := featuregate.FeatureSpec{
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Default: spec.Default,
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LockToDefault: spec.LockToDefault,
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}
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switch spec.PreRelease {
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case clientfeatures.Alpha:
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converted.PreRelease = featuregate.Alpha
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case clientfeatures.Beta:
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converted.PreRelease = featuregate.Beta
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case clientfeatures.GA:
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converted.PreRelease = featuregate.GA
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case clientfeatures.Deprecated:
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converted.PreRelease = featuregate.Deprecated
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default:
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// The default case implies programmer error. The same set of prerelease
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// constants must exist in both component-base and client-go, and each one
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// must have a case here.
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panic(fmt.Sprintf("unrecognized prerelease %q of feature %q", spec.PreRelease, name))
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}
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out[featuregate.Feature(name)] = converted
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}
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return a.mfg.Add(out) //nolint:forbidigo // No need to support versioned feature gates in client adapter
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}
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// Set implements the unexported interface that client-go feature gate testing expects for
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// ek8s.io/client-go/features/testing.SetFeatureDuringTest. This is necessary for integration tests
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// to set test overrides for client-go feature gates.
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func (a *clientAdapter) Set(name clientfeatures.Feature, enabled bool) error {
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return a.mfg.SetFromMap(map[string]bool{string(name): enabled})
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}
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