use chalk instead

Author: hajjem-ayoub

package.json

@@ -28,7 +28,7 @@
     "repl.js"
   ],
   "scripts": {
-    "postinstall": "node --eval \"if (require('./package.json').name === 'coffee-script') { var red, yellow, cyan, reset; red = yellow = cyan = reset = ''; if (!process.env.NODE_DISABLE_COLORS) { red = '\\x1b[31m'; yellow = '\\x1b[33m'; cyan = '\\x1b[36m'; reset = '\\x1b[0m'; } console.warn(red + 'CoffeeScript has moved!' + reset + ' Please update references to ' + yellow + '\\\"coffee-script\\\"' + reset + ' to use ' + yellow + '\\\"coffeescript\\\"' + reset + ' (no hyphen) instead.'); console.warn('Also, a new major version has been released under the ' + yellow + 'coffeescript' + reset + ' name on NPM. This new release targets modern JavaScript, with minimal breaking changes. Learn more at ' + cyan + 'http://coffeescript.org' + reset + '.'); console.warn(''); }\"",
+    "postinstall": "node ./warning.js",
     "test": "node ./bin/cake test",
     "test-harmony": "node --harmony ./bin/cake test"
   },
@@ -45,5 +45,8 @@
     "jison": "~0.4.18",
     "markdown-it": "~8.4.0",
     "underscore": "~1.8.3"
+  },
+  "dependencies": {
+    "chalk": "^2.3.0"
   }
 }

warning.js

@@ -0,0 +1,13 @@
+const chalk = require('chalk');
+if (require('./package.json').name === 'coffee-script') { 
+  // var red, yellow, cyan, reset; red = yellow = cyan = reset = ''; 
+  // if (!process.env.NODE_DISABLE_COLORS) { 
+  //   red = '\\x1b[31m'; 
+  //   yellow = '\\x1b[33m'; 
+  //   cyan = '\\x1b[36m'; 
+  //   reset = '\\x1b[0m'; 
+  // } 
+  console.warn(chalk.red('CoffeeScript has moved!') + ' Please update references to ' + chalk.yellow('coffee-script') + ' to use ' + chalk.yellow('coffeescript') + ' (no hyphen) instead.'); 
+  console.warn('Also, a new major version has been released under the ' + chalk.yellow('coffeescript') + ' name on NPM. This new release targets modern JavaScript, with minimal breaking changes. Learn more at ' + chalk.cyan('http://coffeescript.org') + '.'); 
+  console.warn(''); 
+}