Fix I/O and sharing of environments

repl-server.rkt

@@ -22,10 +22,12 @@
       (printf "Got API ~v\n" api)
       (semaphore-wait (make-semaphore 0)))))
 
-(define *shells* (make-hash))
+(define *environments* (make-hash))
 
 (define *interaction* (make-room 'interaction))
 
+(define *interaction-handle* (make-parameter #f))
+
 (define *prompt* "RacketSSH> ")
 
 (define (->string/safe bs)
@@ -72,25 +74,28 @@
 					(read-syntax "<ssh-session>" (current-input-port)))))
     (thunk)))
 
-(define (get-user-evaluator username)
-  (when (not (hash-has-key? *shells* username))
-    (hash-set! *shells* username (make-evaluator 'racket/base)))
-  (hash-ref *shells* username))
+(define (get-user-environment username)
+  (when (not (hash-has-key? *environments* username))
+    (hash-set! *environments* username (make-base-namespace)))
+  (hash-ref *environments* username))
 
 (define (repl-shell username in out)
-  (fprintf out "Hello, ~a.\n" username)
   (define handle (join-room *interaction* username))
+  (define env (get-user-environment username))
   (parameterize ((current-input-port in)
 		 (current-output-port out)
 		 (current-error-port out)
 		 (sandbox-input in)
 		 (sandbox-output out)
 		 (sandbox-error-output out)
-		 (current-namespace (make-empty-namespace)))
-    (parameterize ((current-eval (get-user-evaluator username)))
+		 (current-namespace env)
+		 (sandbox-namespace-specs (list (lambda () env))))
+    (parameterize ((current-eval (make-evaluator '(begin))))
+      (printf "Hello, ~a.\n" username)
+      (eval `(,*interaction-handle* ,handle))
       (eval `(define say ,(lambda (utterance)
-			    (printf "   You: ~a\n" (->string/safe utterance))
-			    (send handle say utterance)
+			    (printf "    You: ~a\n" (->string/safe utterance))
+			    (send (*interaction-handle*) say utterance)
 			    (void))))
       (call-with-interaction-prompt-read handle read-eval-print-loop))
     (fprintf out "\nGoodbye!\n")