X-Git-Url: http://git.lukelau.me/?p=scheme.git;a=blobdiff_plain;f=main.scm;h=e6ac821f2e7407604a72c622dca82aeb79e56d5b;hp=289840b38db3ee0fb75d91bd42bab6297f40f977;hb=HEAD;hpb=da18430cebcb7b813c9b29841f78d65580c91684

diff --git a/main.scm b/main.scm
old mode 100644
new mode 100755
index 289840b..e6ac821
--- a/main.scm
+++ b/main.scm
@@ -1,6 +1,44 @@
+#!/usr/bin/scheme --script
+
 (load "codegen.scm")
+(load "platform.scm")
+
+; returns (os filename)
+(define (parse-args)
+  (define (parse-os x)
+    (if (null? x) host-os ; todo: replace this with the os
+					; it was compiled with
+	(if
+	 (or (equal? (car x) "-t")
+	     (equal? (car x) "--target"))
+	 (case (cadr x)
+	   (("darwin") 'darwin)
+	   (("linux")  'linux)
+	   (else (error #f "unknown os")))	   
+	 (parse-os (cdr x)))))
+  (define (parse-file x)
+    (if (null? x) 'stdin
+	(if
+	 (or (equal? (car x) "-t")
+	     (equal? (car x) "--target"))
+	 (parse-file (cddr x))
+	 (car x))))
+  (let ((args (cdr (command-line))))
+    (list (parse-os args) (parse-file args))))
+
+
+(define target (car (parse-args)))
+(define file (cadr (parse-args)))
+
+					; reads in all datums until eof
+(define (read-prog port)
+  (let ([x (read port)])
+    (if (eof-object? x)
+	'()
+	(cons x (read-prog port)))))
 
 (compile-to-binary
- (if (> (length (command-line)) 1)
-     (call-with-input-file (cadr (command-line)) read)
-     (read)))
+ (if (eqv? file 'stdin)
+     (read-prog (current-input-port))     
+     (call-with-input-file file read-prog))
+ "a.out" target)