github.com/voedger/voedger@v0.0.0-20240520144910-273e84102129/pkg/goutils/cobrau/catch_interrupt.go (about)

     1  /*
     2  * Copyright (c) 2023-present unTill Pro, Ltd.
     3  * @author Maxim Geraskin
     4   */
     5  
     6  package cobrau
     7  
     8  import (
     9  	"context"
    10  	"os"
    11  	"os/signal"
    12  	"sync"
    13  
    14  	"github.com/spf13/cobra"
    15  	"github.com/voedger/voedger/pkg/goutils/logger"
    16  )
    17  
    18  func ExecCommandAndCatchInterrupt(cmd *cobra.Command) error {
    19  
    20  	cmdExec := func(ctx context.Context) (err error) {
    21  		err = cmd.ExecuteContext(ctx)
    22  		return
    23  	}
    24  
    25  	return goAndCatchInterrupt(cmdExec)
    26  
    27  }
    28  
    29  func goAndCatchInterrupt(f func(ctx context.Context) error) (err error) {
    30  
    31  	var signals = make(chan os.Signal, 1)
    32  
    33  	ctx, cancel := context.WithCancel(context.Background())
    34  	signal.Notify(signals, os.Interrupt)
    35  
    36  	wg := sync.WaitGroup{}
    37  	wg.Add(1)
    38  	go func() {
    39  		defer wg.Done()
    40  		err = f(ctx)
    41  		cancel()
    42  	}()
    43  
    44  	select {
    45  	case sig := <-signals:
    46  		logger.Info("signal received:", sig)
    47  		cancel()
    48  	case <-ctx.Done():
    49  	}
    50  	logger.Verbose("waiting for function to finish...")
    51  	wg.Wait()
    52  	return err
    53  }