52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
/*
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Copyright 2021 The Crossplane 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 feature contains utilities for managing Crossplane features.
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package feature
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import (
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"sync"
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)
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// A Flag enables a particular feature.
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type Flag string
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// Flags that are enabled. The zero value - i.e. &feature.Flags{} - is usable.
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type Flags struct {
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m sync.RWMutex
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enabled map[Flag]bool
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}
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// Enable a feature flag.
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func (fs *Flags) Enable(f Flag) {
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fs.m.Lock()
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if fs.enabled == nil {
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fs.enabled = make(map[Flag]bool)
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}
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fs.enabled[f] = true
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fs.m.Unlock()
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}
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// Enabled returns true if the supplied feature flag is enabled.
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func (fs *Flags) Enabled(f Flag) bool {
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if fs == nil {
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return false
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}
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fs.m.RLock()
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defer fs.m.RUnlock()
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return fs.enabled[f]
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}
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