flags pkg : but im not convinced this is right

sort/sort.go

@@ -1,10 +1,23 @@
 package sort
 
 import (
+	"flag"
 	"fmt"
+
+	"github.com/brtholomy/um/go/flags"
+)
+
+const (
+	key flags.Flag = "key"
 )
 
 func Sort(args []string) {
-	fmt.Println("sort")
-	fmt.Println(args)
+	sortFlags := flag.NewFlagSet("sort", flag.ExitOnError)
+	sortKey := sortFlags.String(string(key), "", "filename of ordered list to use as key")
+
+	sortFlags.Parse(args)
+	fmt.Println("subcmd sort")
+	fmt.Printf("key: %#v\n", *sortKey)
+	fmt.Printf("args: %#v\n", sortFlags.Args())
+	sortFlags.Usage()
 }