70 lines
1.9 KiB
Go
70 lines
1.9 KiB
Go
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/*
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Copyright 2019 the Velero contributors.
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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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"strings"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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type featureFlagSet struct {
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set sets.String
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}
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// featureFlags will store all the flags for this process until NewFeatureFlagSet is called.
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var featureFlags featureFlagSet
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// IsEnabled returns True if a specified flag is enabled.
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func IsEnabled(name string) bool {
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return featureFlags.set.Has(name)
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}
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// Enable adds a given slice of feature names to the current feature list.
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func Enable(names ...string) {
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// Initialize the flag set so that users don't have to
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if featureFlags.set == nil {
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NewFeatureFlagSet()
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}
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featureFlags.set.Insert(names...)
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}
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// Disable removes all feature flags in a given slice from the current feature list.
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func Disable(names ...string) {
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featureFlags.set.Delete(names...)
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}
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// All returns enabled features as a slice of strings.
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func All() []string {
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return featureFlags.set.List()
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}
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// Serialize returns all features as a comma-separated string.
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func Serialize() string {
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return strings.Join(All(), ",")
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}
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// NewFeatureFlagSet initializes and populates a new FeatureFlagSet.
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// This must be called to properly initialize the set for tracking flags.
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// It is also useful for selectively controlling flags during tests.
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func NewFeatureFlagSet(flags ...string) {
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featureFlags = featureFlagSet{
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set: sets.NewString(flags...),
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}
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}
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