Added an extension on node's 'require' module so it can import .coffee module and added some tests to make sure it works.

Cakefile

@@ -68,6 +68,8 @@ task 'doc:underscore', 'rebuild the Underscore.coffee documentation page', ->
 
 task 'test', 'run the CoffeeScript language test suite', ->
   process.mixin require 'assert'
+  require.paths.unshift './test'
+  
   test_count: 0
   start_time: new Date()
   [original_ok, original_throws]: [ok, throws]

lib/coffee-script.js

@@ -17,6 +17,9 @@
     Lexer = this.Lexer;
     parser = this.parser;
   }
+  require.registerExtension('.coffee', function(content) {
+    return require('coffee-script').compile(content);
+  });
   // The current CoffeeScript version number.
   exports.VERSION = '0.5.5';
   // Instantiate a Lexer for our use here.

src/coffee-script.coffee

@@ -17,6 +17,9 @@ else
   Lexer:        this.Lexer
   parser:       this.parser
 
+require.registerExtension '.coffee', (content) ->
+  require('coffee-script').compile content
+
 # The current CoffeeScript version number.
 exports.VERSION: '0.5.5'
 

test/test_importing.coffee

@@ -0,0 +1,2 @@
+# Check if it can import a coffeescript-only module and check its output
+ok (require 'test_module').foo is "bar"

test/test_module.coffee

@@ -0,0 +1 @@
+exports.foo: "bar"