fix auto and manual require.extensions registration; ref #3141

You can now `require('coffee-script/register')` to manually register,
and the compiler auto-registers when directly running a coffee file.

Cakefile

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

lib/coffee-script/command.js

@@ -178,6 +178,7 @@
       } else if (o.nodes) {
         return printLine(CoffeeScript.nodes(t.input, t.options).toString().trim());
       } else if (o.run) {
+        require('./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('./extensions');
+      require('./register');
       process.argv = ['coffee'].concat(process.argv.slice(2));
       opts = merge(replDefaults, opts);
       repl = nodeREPL.start(opts);

register.js

@@ -0,0 +1 @@
+require('./lib/coffee-script/register');

src/command.coffee

@@ -133,9 +133,13 @@ compileScript = (file, input, base = null) ->
   try
     t = task = {file, input, options}
     CoffeeScript.emit 'compile', task
-    if      o.tokens      then printTokens CoffeeScript.tokens t.input, t.options
-    else if o.nodes       then printLine CoffeeScript.nodes(t.input, t.options).toString().trim()
-    else if o.run         then CoffeeScript.run t.input, t.options
+    if o.tokens
+      printTokens CoffeeScript.tokens t.input, t.options
+    else if o.nodes
+      printLine CoffeeScript.nodes(t.input, t.options).toString().trim()
+    else if o.run
+      require './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
       sourceCode[sources.indexOf(t.file)] = t.input

src/repl.coffee

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