move daemon stuff out of main into daemon source file

daemon.go

@@ -1,7 +1,12 @@
 package main
 
 import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"log"
 	"os"
+	"os/exec"
 	"strconv"
 )
 
@@ -26,3 +31,92 @@ func savePID(pidfile string, p int) error {
 
 	return nil
 }
+
+func daemonStart(pidfile string) error {
+	// check if daemon already running.
+	if _, err := os.Stat(pidfile); err == nil {
+		return errors.New("sisyphus running or " + pidfile + " file exists.")
+	}
+
+	cmd := exec.Command(os.Args[0], "run")
+	cmd.Start()
+	log.Printf("starting sisyphus process ID [%v]\n", cmd.Process.Pid)
+	log.Println("sisyphus started")
+	err := savePID(pidfile, cmd.Process.Pid)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func daemonStop(pidfile string) error {
+
+	_, err := os.Stat(pidfile)
+	if err != nil {
+		return errors.New("sisyphus is not running")
+	}
+
+	processIDRaw, err := ioutil.ReadFile(pidfile)
+	if err != nil {
+		return errors.New("sisyphus is not running")
+	}
+
+	processID, err := strconv.Atoi(string(processIDRaw))
+	if err != nil {
+		return errors.New("unable to read and parse process id found in " + pidfile)
+	}
+
+	process, err := os.FindProcess(processID)
+
+	if err != nil {
+		e := fmt.Sprintf("Unable to find process ID [%v] with error %v \n", processID, err)
+		return errors.New(e)
+	}
+
+	// remove PID file
+	os.Remove(pidfile)
+
+	log.Printf("stopping sisyphus process ID [%v]\n", processID)
+	// kill process and exit immediately
+	err = process.Kill()
+
+	if err != nil {
+		e := fmt.Sprintf("Unable to kill process ID [%v] with error %v \n", processID, err)
+		return errors.New(e)
+	}
+
+	log.Println("sisyphus stopped")
+	os.Exit(0)
+
+	return nil
+}
+
+func daemonRestart(pidfile string) error {
+	_, err := os.Stat(pidfile)
+	if err != nil {
+		return errors.New("sisyphus is not running")
+	}
+
+	pid, err := ioutil.ReadFile(pidfile)
+	if err != nil {
+		return errors.New("sisyphus is not running")
+	}
+
+	cmd := exec.Command(os.Args[0], "stop")
+	err = cmd.Start()
+	if err != nil {
+		return err
+	}
+	log.Printf("stopping sisyphus process ID [%v]\n", string(pid))
+
+	cmd = exec.Command(os.Args[0], "start")
+	err = cmd.Start()
+	if err != nil {
+		return err
+	}
+
+	log.Println("sisyphus restarted")
+
+	return nil
+}

main.go

@@ -1,14 +1,10 @@
 package main
 
 import (
-	"fmt"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
-	"os/exec"
 	"os/signal"
-	"strconv"
 	"syscall"
 
 	"github.com/urfave/cli"
@@ -129,18 +125,10 @@ func main() {
 			Aliases: []string{"s"},
 			Usage:   "start sisyphus daemon in the background",
 			Action: func(c *cli.Context) error {
-				// check if daemon already running.
-				if _, err := os.Stat(*pidfile); err == nil {
-					return cli.NewExitError("sisyphus running or "+*pidfile+" file exists.", 69)
-				}
 
-				cmd := exec.Command(os.Args[0], "run")
-				cmd.Start()
-				log.Printf("starting sisyphus process ID [%v]\n", cmd.Process.Pid)
-				log.Println("sisyphus started")
-				err := savePID(*pidfile, cmd.Process.Pid)
+				err := daemonStart(*pidfile)
 				if err != nil {
-					return cli.NewExitError(err, 73)
+					log.Fatal(err)
 				}
 
 				return nil
@@ -152,43 +140,11 @@ func main() {
 			Usage:   "stop sisyphus daemon",
 			Action: func(c *cli.Context) error {
 
-				_, err := os.Stat(*pidfile)
-				if err != nil {
-					return cli.NewExitError("sisyphus is not running", 64)
-				}
-
-				processIDRaw, err := ioutil.ReadFile(*pidfile)
-				if err != nil {
-					return cli.NewExitError("sisyphus is not running", 64)
-				}
-
-				processID, err := strconv.Atoi(string(processIDRaw))
-				if err != nil {
-					return cli.NewExitError("unable to read and parse process id found in "+*pidfile, 74)
-				}
-
-				process, err := os.FindProcess(processID)
-
-				if err != nil {
-					e := fmt.Sprintf("Unable to find process ID [%v] with error %v \n", processID, err)
-					return cli.NewExitError(e, 71)
-				}
-
-				// remove PID file
-				os.Remove(*pidfile)
-
-				log.Printf("stopping sisyphus process ID [%v]\n", processID)
-				// kill process and exit immediately
-				err = process.Kill()
-
+				err := daemonStop(*pidfile)
 				if err != nil {
-					e := fmt.Sprintf("Unable to kill process ID [%v] with error %v \n", processID, err)
-					return cli.NewExitError(e, 71)
+					log.Fatal(err)
 				}
 
-				log.Println("sisyphus stopped")
-				os.Exit(0)
-
 				return nil
 			},
 		},
@@ -197,31 +153,12 @@ func main() {
 			Aliases: []string{"r"},
 			Usage:   "restart sisyphus daemon",
 			Action: func(c *cli.Context) error {
-				_, err := os.Stat(*pidfile)
-				if err != nil {
-					return cli.NewExitError("sisyphus is not running", 64)
-				}
 
-				pid, err := ioutil.ReadFile(*pidfile)
+				err := daemonRestart(*pidfile)
 				if err != nil {
-					return cli.NewExitError("sisyphus is not running", 64)
+					log.Fatal(err)
 				}
 
-				cmd := exec.Command(os.Args[0], "stop")
-				err = cmd.Start()
-				if err != nil {
-					return cli.NewExitError(err, 64)
-				}
-				log.Printf("stopping sisyphus process ID [%v]\n", string(pid))
-
-				cmd = exec.Command(os.Args[0], "start")
-				err = cmd.Start()
-				if err != nil {
-					return cli.NewExitError(err, 64)
-				}
-
-				log.Println("sisyphus restarted")
-
 				return nil
 			},
 		},