Added support for single file builds

src/cli/Build.go

@@ -10,7 +10,7 @@ import (
 
 // Build builds an executable.
 func Build(args []string) int {
-	b := build.New(".")
+	b := build.New()
 
 	for i := 0; i < len(args); i++ {
 		switch args[i] {
@@ -26,10 +26,14 @@ func Build(args []string) int {
 				return 2
 			}
 
-			b.Directory = args[i]
+			b.Files = append(b.Files, args[i])
 		}
 	}
 
+	if len(b.Files) == 0 {
+		b.Files = append(b.Files, ".")
+	}
+
 	err := b.Run()
 
 	if err != nil {