streamlined cell running

parse.ce

@@ -1,7 +1,8 @@
+var fd = use("fd")
 var tokenize = use("tokenize")
 var parse = use("parse")
-var src = args[0]
-var filename = length(args) > 1 ? args[1] : "<stdin>"
+var filename = args[0]
+var src = text(fd.slurp(filename))
 var result = tokenize(src, filename)
 var ast = parse(result.tokens, src, filename)
 print(json.encode(ast))