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copied!<p>First of all, use <a href="https://github.com/visionmedia/node-growl" rel="noreferrer">growl</a>. It is easy and flexible to use. To install <strong>growl</strong>:</p> <pre><code>npm install growl --save-dev </code></pre> <p>Then you need to <a href="http://gruntjs.com/api/grunt.util#grunt.util.hooker" rel="noreferrer">hook</a> into the stderr/out stream of the process. This way you can create a notification each time a new message arrives at the stderr/out stream.</p> <p>This is what I've created. I've made a CommonJs module which adds hooks to:</p> <ul> <li><code>grunt.fail.warn()</code>, <code>grunt.fail.fatal()</code></li> <li><code>grunt.log.warn()</code>, <code>grunt.log.error()</code></li> <li><code>grunt.warn()</code></li> <li><code>process.stderr.write()</code></li> <li><code>process.stdout.write()</code> (error lines)</li> <li>(child) <code>process.stderr.write()</code></li> <li>(child) <code>process.stdout.write()</code> (error lines)</li> </ul> <p>It works more or less, but it may need some tweaking.</p> <p><strong>tasks/lib/notify.js</strong></p> <pre><code>(function (module) { var grunt = require('grunt'), growl = require('growl'), Buffer = require('buffer').Buffer; function notify(obj, title) { if (obj) { var message = Buffer.isBuffer(obj) ? obj.toString() : (obj.message || obj); var msg = grunt.log.uncolor(message); if (msg.length > 0) { growl(msg, { title: title, image: 'Console' }); } } } // add a hook to grunt.fail.warn(), grunt.fail.fatal() ['warn', 'fatal'].forEach(function (level) { grunt.util.hooker.hook(grunt.fail, level, function(obj) { notify(obj); }); }); // add a hook to grunt.log.warn(), grunt.log.error() ['warn', 'error'].forEach(function (level) { grunt.util.hooker.hook(grunt.log, level, function(obj) { notify(obj, level); }); }); // add a hook to grunt.warn() grunt.util.hooker.hook(grunt, 'warn', function(obj) { notify(obj, 'warn'); }); // add a hook to process.stderr.write() grunt.util.hooker.hook(process.stderr, 'write', function(obj) { var messages = grunt.log.uncolor((Buffer.isBuffer(obj) ? obj.toString() : (obj.message || obj))).split('\n'); messages.forEach(function (message) { notify(message, 'stderr'); }); }); // add a hook to process.stdout.write() (only error lines) grunt.util.hooker.hook(process.stdout, 'write', function(obj) { var messages = grunt.log.uncolor((Buffer.isBuffer(obj) ? obj.toString() : (obj.message || obj))).split('\n'); messages.forEach(function (message) { if (message && message.indexOf('error ') > -1) { notify(message, 'stdout'); } }); }); // add a hook to child process stdout/stderr write() (only error lines) grunt.util.hooker.hook(grunt.util, 'spawn', { post: function(child) { child.stderr.on('data', function (data) { var messages = grunt.log.uncolor(data.toString()).split('\n'); messages.forEach(function (message) { notify(message, 'stderr'); }); }); child.stdout.on('data', function (data) { var messages = grunt.log.uncolor(data.toString()).split('\n'); messages.forEach(function (message) { if (message && message.indexOf('error ') > -1) { notify(message, 'stdout'); } }); }); } }); }) (module); </code></pre> <p>Then you need to include it in your <strong>Gruntfile.js</strong> with a <code>require</code> statement:</p> <pre><code>module.exports = function (grunt) { grunt.initConfig({ ... }); require('./tasks/lib/notify'); ... }; </code></pre> <p>PS I've placed the file in <code>tasks/lib/notify.js</code>, but feel free to place it somewhere else.</p>

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