Refactor signer code into command and package

cmd/signer/main.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"flag"
+	"os"
+	"os/signal"
+
+	log "github.com/sirupsen/logrus"
+	"go.bug.st/serial"
+
+	"git.cacert.org/cacert-gosigner/signer"
+)
+
+func main() {
+	var (
+		address  string
+		baudRate int
+	)
+
+	flag.StringVar(&address, "a", "/dev/ttyUSB0", "address")
+	flag.IntVar(&baudRate, "b", 115200, "baud rate")
+	flag.Parse()
+
+	log.SetFormatter(&log.TextFormatter{
+		DisableColors: true,
+		FullTimestamp: true,
+	})
+	log.SetLevel(log.TraceLevel)
+
+	serialMode := &serial.Mode{
+		BaudRate: baudRate,
+		DataBits: 8,
+		StopBits: serial.OneStopBit,
+		Parity:   serial.NoParity,
+	}
+	log.Infof("connecting to %s using %+v", address, serialMode)
+	port, err := serial.Open(address, serialMode)
+	if err != nil {
+		log.Fatalf("could not open serial port: %v", err)
+	}
+	log.Info("connected")
+
+	defer func() {
+		err := port.Close()
+		if err != nil {
+			log.Fatalf("could not close port: %v", err)
+		}
+		log.Info("serial port closed")
+	}()
+
+	done := make(chan bool)
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, os.Interrupt)
+
+	go func() {
+		<-quit
+		log.Info("server is shutting down...")
+
+		close(done)
+	}()
+
+	go func() {
+		signerProcess := signer.NewSignerProcess(port)
+		signerProcess.MainLoop()
+
+		close(quit)
+	}()
+
+	<-done
+	log.Infoln("server stopped")
+}