zealws · December 3, 2015 01:22
diff --git a/test output b/test output
 $ go run test.go google.com
 173.194.33.163
 $ go run test.go 127.0.0.1
 127.0.0.1
 $ go run test.go netflix.com
 174.129.2.58
diff --git a/test.go b/test.go
 package main

 import (
 	"fmt"

 	"gopkg.in/alecthomas/kingpin.v2"
 )

 func main() {
 	addr := kingpin.Arg("addr", "server address").Required().NetAddr()
 	kingpin.Parse()

 	fmt.Println(*addr)
 }
	package main

	import (
	"fmt"

	"gopkg.in/alecthomas/kingpin.v2"
	)

	func main() {
	addr := kingpin.Arg("addr", "server address").Required().NetAddr()
	kingpin.Parse()

	fmt.Println(*addr)
	}