Change behavior. (require racket-makefile) and use (make <target>) instead of racket Makefile.rkt <target>

private/engine.rkt

@@ -6,7 +6,7 @@
          mark-phony!
          set-default-target!
          reset-makefile!
-         run-selected-target!
+         make-targets!
          current-target
          current-dependencies
          current-first-dependency)
@@ -128,20 +128,21 @@
      (hash-set! built-results key rebuilt?)
      rebuilt?]))
 
-(define (selected-targets)
-  (define args (vector->list (current-command-line-arguments)))
+(define (default-targets)
   (cond
-    [(pair? args) args]
     [default-target-name (list default-target-name)]
     [(pair? target-order) (list (car target-order))]
     [else '()]))
 
-(define (run-selected-target!)
-  (define names (selected-targets))
-  (when (null? names)
+(define (make-targets! . names)
+  (define selected
+    (if (null? names)
+        (default-targets)
+        (append-map target-keys names)))
+  (when (null? selected)
     (error 'racket-makefile "no target defined"))
   (define built-results (make-hash))
   (define visiting (make-hash))
-  (for ([name (in-list names)])
+  (for ([name (in-list selected)])
     (build-target! name built-results visiting))
   (void))