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interrupt.go
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interrupt.go
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// Copyright 2020-2024 Buf Technologies, 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 interrupt
import (
"context"
"os"
"os/signal"
)
var signals = append(
[]os.Signal{
os.Interrupt,
},
extraSignals...,
)
// WithCancel returns a context that is cancelled if interrupt signals are sent.
func WithCancel(ctx context.Context) (context.Context, context.CancelFunc) {
signalC, closer := NewSignalChannel()
ctx, cancel := context.WithCancel(ctx)
go func() {
<-signalC
closer()
cancel()
}()
return ctx, cancel
}
// NewSignalChannel returns a new channel for interrupt signals.
//
// Call the returned function to cancel sending to this channel.
func NewSignalChannel() (<-chan os.Signal, func()) {
signalC := make(chan os.Signal, 1)
signal.Notify(signalC, signals...)
return signalC, func() {
signal.Stop(signalC)
close(signalC)
}
}