first draft of node.js REPL

lib/coffee_script/repl.js

@@ -0,0 +1,33 @@
+(function(){
+  var coffee, prompt, quit, readline, run;
+  // A CoffeeScript port/version of the Node.js REPL.
+  // Required modules.
+  coffee = require('./coffee-script');
+  process.mixin(require('sys'));
+  // Shortcut variables.
+  prompt = 'coffee> ';
+  quit = function quit() {
+    return process.stdio.close();
+  };
+  // The main REPL function. Called everytime a line of code is entered.
+  readline = function readline(code) {
+    return coffee.compile(code, run);
+  };
+  // Attempt to evaluate the command. If there's an exception, print it.
+  run = function run(js) {
+    var val;
+    try {
+      val = eval(js);
+      if (val !== undefined) {
+        p(val);
+      }
+    } catch (err) {
+      puts(err.stack || err.toString());
+    }
+    return print(prompt);
+  };
+  // Start up the REPL.
+  process.stdio.open();
+  process.stdio.addListener('data', readline);
+  print(prompt);
+})();