Add examples

examples/flags/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/micro/cli/v2"
+	"github.com/micro/go-micro/v2"
+)
+
+func main() {
+	service := micro.NewService(
+		// Add runtime flags
+		// We could do this below too
+		micro.Flags(
+			&cli.StringFlag{
+				Name:  "string_flag",
+				Usage: "This is a string flag",
+			},
+			&cli.IntFlag{
+				Name:  "int_flag",
+				Usage: "This is an int flag",
+			},
+			&cli.BoolFlag{
+				Name:  "bool_flag",
+				Usage: "This is a bool flag",
+			},
+		),
+	)
+
+	// Init will parse the command line flags. Any flags set will
+	// override the above settings. Options defined here will
+	// override anything set on the command line.
+	service.Init(
+		// Add runtime action
+		// We could actually do this above
+		micro.Action(func(c *cli.Context) error {
+			fmt.Printf("The string flag is: %s\n", c.String("string_flag"))
+			fmt.Printf("The int flag is: %d\n", c.Int("int_flag"))
+			fmt.Printf("The bool flag is: %t\n", c.Bool("bool_flag"))
+			// let's just exit because
+			os.Exit(0)
+			return nil
+		}),
+	)
+
+	// Run the server
+	if err := service.Run(); err != nil {
+		fmt.Println(err)
+	}
+}