woodpecker/cmd/agent/signal.go

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// Copyright 2017 Drone.IO Inc.
//
// This file is licensed under the terms of the MIT license.
// For a copy, see https://opensource.org/licenses/MIT.
package main
import (
"context"
"os"
"os/signal"
"syscall"
)
// WithContextFunc returns a copy of parent context that is canceled when
// an os interrupt signal is received. The callback function f is invoked
// before cancellation.
func WithContextFunc(ctx context.Context, f func()) context.Context {
ctx, cancel := context.WithCancel(ctx)
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
defer signal.Stop(c)
select {
case <-ctx.Done():
case <-c:
f()
cancel()
}
}()
return ctx
}