Add a clean subcommand

Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>

git-svn-id: file:///srv/svn/repo/aya/trunk@63 cec141ff-132a-4243-88a5-ce187bd62f94

cmd/aya/main.go

@@ -380,6 +380,7 @@ func printUsage() {
 	fmt.Printf("\n")
 	fmt.Printf("Where <command> is:\n")
 	fmt.Printf("\tbuild\tGenerate site\n")
+	fmt.Printf("\tclean\tRemoves the generated site directory\n")
 	fmt.Printf("\tserve\tServe %v over HTTP\n", PUBDIR)
 	fmt.Printf("\tvar\tQuery variable(s) from a markdown file\n")
 	fmt.Printf("\tversion\tPrint program version and exit\n")
@@ -406,6 +407,9 @@ func main() {
 		} else {
 			fmt.Println("ERROR: too many arguments")
 		}
+	case "clean":
+		fmt.Println("Removing generated site directory")
+		os.RemoveAll(PUBDIR)
 	case "serve":
 		servePubDir()
 	case "var":