add CoffeeScript.register method for require.extensions registration

Cakefile

@@ -161,7 +161,7 @@ task 'bench', 'quick benchmark of compilation time', ->
 
 # Run the CoffeeScript test suite.
 runTests = (CoffeeScript) ->
-  require './lib/coffee-script/register'
+  CoffeeScript.register()
   startTime   = Date.now()
   currentFile = null
   passedTests = 0

lib/coffee-script/coffee-script.js

@@ -182,6 +182,10 @@
     }
   };
 
+  exports.register = function() {
+    return require('./register');
+  };
+
   exports._compileFile = function(filename, sourceMap) {
     var answer, err, raw, stripped;
     if (sourceMap == null) {

lib/coffee-script/command.js

@@ -178,7 +178,7 @@
       } else if (o.nodes) {
         return printLine(CoffeeScript.nodes(t.input, t.options).toString().trim());
       } else if (o.run) {
-        require('./register');
+        CoffeeScript.register();
         return CoffeeScript.run(t.input, t.options);
       } else if (o.join && t.file !== o.join) {
         if (helpers.isLiterate(file)) {

lib/coffee-script/repl.js

@@ -145,7 +145,7 @@
         console.warn("Node 0.8.0+ required for CoffeeScript REPL");
         process.exit(1);
       }
-      require('./register');
+      CoffeeScript.register();
       process.argv = ['coffee'].concat(process.argv.slice(2));
       opts = merge(replDefaults, opts);
       repl = nodeREPL.start(opts);

src/coffee-script.coffee

@@ -156,6 +156,8 @@ exports.eval = (code, options = {}) ->
   else
     vm.runInContext js, sandbox
 
+exports.register = -> require './register'
+
 exports._compileFile = (filename, sourceMap = no) ->
   raw = fs.readFileSync filename, 'utf8'
   stripped = if raw.charCodeAt(0) is 0xFEFF then raw.substring 1 else raw

src/command.coffee

@@ -138,7 +138,7 @@ compileScript = (file, input, base = null) ->
     else if o.nodes
       printLine CoffeeScript.nodes(t.input, t.options).toString().trim()
     else if o.run
-      require './register'
+      CoffeeScript.register()
       CoffeeScript.run t.input, t.options
     else if o.join and t.file isnt o.join
       t.input = helpers.invertLiterate t.input if helpers.isLiterate file

src/repl.coffee

@@ -131,7 +131,7 @@ module.exports =
       console.warn "Node 0.8.0+ required for CoffeeScript REPL"
       process.exit 1
 
-    require './register'
+    CoffeeScript.register()
     process.argv = ['coffee'].concat process.argv[2..]
     opts = merge replDefaults, opts
     repl = nodeREPL.start opts