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41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
package signals
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import (
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"context"
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"log/slog"
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"os"
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"os/signal"
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"syscall"
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)
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/*
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This code is adapted from:
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https://github.com/kubernetes-sigs/controller-runtime/blob/8499b67e316a03b260c73f92d0380de8cd2e97a1/pkg/manager/signals/signal.go
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Copyright 2017 The Kubernetes Authors.
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License: Apache2 (https://github.com/kubernetes-sigs/controller-runtime/blob/8499b67e316a03b260c73f92d0380de8cd2e97a1/LICENSE)
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*/
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var onlyOneSignalHandler = make(chan struct{})
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// SignalContext returns a context that is canceled when the application receives an interrupt signal.
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// A second signal forces an immediate shutdown.
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func SignalContext(parentCtx context.Context) context.Context {
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close(onlyOneSignalHandler) // Panics when called twice
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ctx, cancel := context.WithCancel(parentCtx)
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sigCh := make(chan os.Signal, 2)
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signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
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go func() {
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<-sigCh
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slog.Info("Received interrupt signal. Shutting down…")
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cancel()
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<-sigCh
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slog.Warn("Received a second interrupt signal. Forcing an immediate shutdown.")
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os.Exit(1)
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}()
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return ctx
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}
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