Fix and improve the iris cmd according to this: https://github.com/kataras/iris/issues/506

iris/run.go

@@ -6,16 +6,28 @@ import (
 	"strings"
 
 	"github.com/kataras/cli"
+	"github.com/kataras/go-errors"
 	"github.com/kataras/rizla/rizla"
 )
 
-func runAndWatch(flags cli.Flags) error {
+func buildRunCommand() *cli.Cmd {
+	return cli.Command("run", "runs and reload on source code changes, example: iris run main.go").Action(run)
+}
+
+var errInvalidManualArgs = errors.New("Invalid arguments [%s], type -h to get assistant")
+
+func run(cli.Flags) error {
 	if len(os.Args) <= 2 {
-		printer.Dangerf("Invalid arguments [%s], type -h to get assistant", strings.Join(os.Args, ","))
-		os.Exit(-1)
+		err := errInvalidManualArgs.Format(strings.Join(os.Args, ","))
+		app.Printf(err.Error()) // the return should print it too but do it for any case
+		return err
 	}
 	programPath := os.Args[2]
+	runAndWatch(programPath)
+	return nil
+}
 
+func runAndWatch(programPath string) {
 	/*
 		project := rizla.NewProject(programPath)
 		project.Name = "IRIS"
@@ -29,6 +41,4 @@ func runAndWatch(flags cli.Flags) error {
 	// or just do that:
 	rizla.DefaultDisableProgramRerunOutput = true // we don't want the banner to be shown after the first run
 	rizla.Run(programPath)
-
-	return nil
 }