Error handling. Vendoring

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

src/sys.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+
+	"github.com/dixonwille/wmenu"
+)
+
+type flags struct {
+	redisAddr string
+	redisPwd  string
+	redisDB   int
+}
+
+var (
+	//ErrStdRead it thrown when it's not possible to read from the standard input
+	ErrStdRead = errors.New("couldn't read string from stdin")
+)
+
+func getFlags() (flags, error) {
+
+	var cmdFlags flags
+
+	const (
+		defaultAddr = "127.0.0.1:6379"
+		addrUsage   = "The address of the redis instance"
+		defaultPwd  = ""
+		pwdUsage    = "The password of the redis instance"
+		defaultDB   = 0
+		dbUsage     = "The database to be selected after connecting to redis instance"
+	)
+
+	flag.StringVar(&(cmdFlags.redisAddr), "redisAddr", defaultAddr, addrUsage)
+	flag.StringVar(&(cmdFlags.redisAddr), "a", defaultAddr, addrUsage+"(shorthand)")
+	flag.StringVar(&(cmdFlags.redisPwd), "redisPwd", defaultPwd, pwdUsage)
+	flag.StringVar(&(cmdFlags.redisPwd), "p", defaultPwd, pwdUsage+"(shorthand)")
+	flag.IntVar(&(cmdFlags.redisDB), "redisDB", defaultDB, dbUsage)
+	flag.IntVar(&(cmdFlags.redisDB), "d", defaultDB, dbUsage+"(shorthand)")
+
+	flag.Parse()
+
+	return cmdFlags, nil
+}
+
+func startMenu() {
+	fmt.Println("Welcome in barandaBot! Here you can control the bot(s) options and configurations.")
+	menu := wmenu.NewMenu("What do you want to do?")
+	menu.Action(func)
+}