Megatest

	     (getenv "MT_RUNNAME")   "/"
	     (getenv "MT_TEST_NAME") "/"
	     (if (or (getenv "MT_ITEMPATH")
		     (not (string=? "" (getenv "MT_ITEMPATH"))))
		 (conc "/" (getenv "MT_ITEMPATH"))))))

(define (tests:get-testconfig test-name test-registry system-allowed #!key (force-create #f))
  (let* ((treg              (or test-registry
				(tests:get-all)))
  (let* ((test-path         (hash-table-ref/default 
			     test-registry test-name 
	 (test-path         (hash-table-ref/default 
			     treg test-name 
			     (conc *toppath* "/tests/" test-name)))
	 (test-configf (conc test-path "/testconfig"))
	 (testexists   (and (file-exists? test-configf)(file-read-access? test-configf)))
	 (cache-path   (tests:get-test-path-from-environment))
	 (cache-exists (and cache-path 
			    (not force-create)  ;; if force-create then pretend there is no cache to read
			    (file-exists? (conc cache-path "/.testconfig"))))
	 (cache-file   (conc cache-path "/.testconfig"))
	 (tcfg         (if testexists
			   (or (and (not force-create)
			   (or (and cache-exists
				    cache-exists
				    (handle-exceptions
				     exn
				     (begin
				       (debug:print 0 "WARNING: Failed to read " cache-file) 
				       #f)
				       (make-hash-table)) ;; better to return a hash and keep going - I think
				     (configf:read-alist cache-file)))
			       (read-config test-configf #f system-allowed environ-patt: (if system-allowed
											     "pre-launch-env-vars"
											     #f)))
			   #f)))
    (hash-table-set! *testconfigs* test-name tcfg)
    (if (and testexists