world settables can use file or dir path

cache.rkt

@@ -146,10 +146,8 @@
   (when (not (file-exists? path))
     (error (format "cached-require: ~a does not exist" path)))
   
-  (define-values (path-dir path-name _) (split-path path))
-  
   (cond
-    [(world:current-compile-cache-active path-dir)
+    [(world:current-compile-cache-active path)
      (define key (paths->key path))
      (hash-ref (hash-ref! ram-cache key (λ _
                                           (cache-ref! key (λ _ (path->hash path))))) subkey)]

render.rkt

@@ -96,8 +96,7 @@
   (cond
     [(not (file-exists? output-path)) 'file-missing]
     [(mod-date-missing-or-changed? source-path template-path) 'mod-key-missing-or-changed]
-    [(let-values ([(source-dir source-name _) (split-path source-path)])
-       (not (world:current-render-cache-active source-dir))) 'render-cache-deactivated]
+    [(not (world:current-render-cache-active source-path)) 'render-cache-deactivated]
     [else #f]))
 
 

world.rkt

@@ -8,14 +8,12 @@
 
 (define directory-require "pollen.rkt")
 
-(define (get-path-to-override [starting-dir (current-directory)])
-  ;; for now, let `path->complete-path` flag any argument errors (test here is redundant)
-  #;(when (or (not (path? starting-dir)) (not (directory-exists? starting-dir)))
-    (error 'get-path-to-override (format "~a is not a directory" starting-dir)))
+(define (get-path-to-override [file-or-dir (current-directory)])
   (define file-with-config-submodule directory-require)
   (define (dirname path)
     (let-values ([(dir name dir?) (split-path path)])
       dir))
+  (define starting-dir (if (directory-exists? file-or-dir) file-or-dir (dirname file-or-dir)))
   (let loop ([dir starting-dir][path file-with-config-submodule])
     (and dir ; dir is #f when it hits the top of the filesystem
          (let ([completed-path (path->complete-path path starting-dir)])