Gists for blogpost http://marcofranssen.nl/automate-your-development-tasks-using-grunt

combinedtasks-example.js

grunt.registerTask('ci', ['jshint', 'concat', 'uglify', 'less', 'cssmin']);

grunt-watch-example.js

module.exports = function(grunt) {
  'use strict';

  grunt.initConfig({
    //other tasks left for brevity
    
    watch: {
      scripts: {
        files: 'js/**/*.js',
        tasks: ['jshint', 'mocha:unittest', 'phantom']
      },
      less: {
        files: 'less/**/*.less',
        tasks: ['less']
      },
      styles: {
        files: 'css/**/*.css',
        tasks: ['cssmin']
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-uglify');
};

gruntfile.js

module.exports = function(grunt) {
  'use strict';

  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),

    meta: {
      banner: '/*! <%= pkg.name %> - v<%= pkg.version %> <%= grunt.template.today("yyyy-mm-dd") %> */'
    },

    secret: grunt.file.readJSON('secret.json'),

    jshint: {
      options: {
        jshintrc: '.jshintrc'
      },
      gruntfile: ['Gruntfile.js'],
      serverside: ['server/src/**/*.js', 'server/*.js'],
      clientside: ['js/cors/*.js', 'js/*.js', '!js/thirdparty/**'],
      tests: ['test/**/*.js']
    },

    concat: {
      options: {
        stripBanners: true,
        banner: '<%= meta.banner %>'
      },
      javascript: {
        files: {
          'build/js/myawesomeapplication.js': [
            'js/thirdparty/jquery.iframe-transports.js', 'js/app.js', 'js/validation.js',
            'js/controller.js', 'js/router.js', 'js/modules/**/*.js'
          ]
        },
        nonull: true
      }
    },

    uglify: {
      options: {
        banner: '<%= meta.banner %>',
        compress: {
          drop_console: true,
          sequences: true, // join consecutive statemets with the “comma operator”
          properties: true, // optimize property access: a["foo"] → a.foo
          dead_code: true, // discard unreachable code
          drop_debugger: true, // discard “debugger” statements
          unsafe: false, // some unsafe optimizations (see below)
          conditionals: true, // optimize if-s and conditional expressions
          comparisons: true, // optimize comparisons
          evaluate: true, // evaluate constant expressions
          booleans: true, // optimize boolean expressions
          loops: true, // optimize loops
          unused: true, // drop unused variables/functions
          hoist_funs: true, // hoist function declarations
          hoist_vars: false, // hoist variable declarations
          if_return: true, // optimize if-s followed by return/continue
          join_vars: true, // join var declarations
          cascade: true, // try to cascade `right` into `left` in sequences
          side_effects: true, // drop side-effect-free statements
          warnings: true
        },
        report: 'gzip'
      },
      javascript: {
        files: {
          'build/js/myawesomeapplication.min.js': ['build/js/myawesomeapplication.js']
        }
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');

  grunt.registerTask('default', ['']);
  grunt.registerTask('minify', ['concat', 'uglify']);
};