[CS2] Un-prefer global (#4543)

* Don’t prefer global installation; the `coffee` or `cake` commands should try to run the locally-installed module if it exists, or the global version otherwise

* Style

Author: GeoffreyBooth

bin/cake

@@ -2,6 +2,17 @@
 
 var path = require('path');
 var fs   = require('fs');
-var lib  = path.join(path.dirname(fs.realpathSync(__filename)), '../lib');
 
-require(lib + '/coffeescript/cake').run();
+var potentialPaths = [
+  path.join(process.cwd(), 'node_modules/coffeescript/lib/coffeescript'),
+  path.join(process.cwd(), 'node_modules/coffeescript/lib/coffee-script'),
+  path.join(process.cwd(), 'node_modules/coffee-script/lib/coffee-script'),
+  path.join(__dirname, '../lib/coffeescript')
+];
+
+for (var i = 0, len = potentialPaths.length; i < len; i++) {
+  if (fs.existsSync(potentialPaths[i])) {
+    require(potentialPaths[i] + '/cake').run();
+    break;
+  }
+}

bin/coffee

@@ -2,6 +2,17 @@
 
 var path = require('path');
 var fs   = require('fs');
-var lib  = path.join(path.dirname(fs.realpathSync(__filename)), '../lib');
 
-require(lib + '/coffeescript/command').run();
+var potentialPaths = [
+  path.join(process.cwd(), 'node_modules/coffeescript/lib/coffeescript'),
+  path.join(process.cwd(), 'node_modules/coffeescript/lib/coffee-script'),
+  path.join(process.cwd(), 'node_modules/coffee-script/lib/coffee-script'),
+  path.join(__dirname, '../lib/coffeescript')
+];
+
+for (var i = 0, len = potentialPaths.length; i < len; i++) {
+  if (fs.existsSync(potentialPaths[i])) {
+    require(potentialPaths[i] + '/command').run();
+    break;
+  }
+}

package.json

@@ -27,7 +27,6 @@
     "register.js",
     "repl.js"
   ],
-  "preferGlobal": true,
   "scripts": {
     "test": "node ./bin/cake test",
     "test-harmony": "node --harmony ./bin/cake test"