boilerplate Grunt configuration

gruntfile.js

module.exports = function(grunt) {

  // 1. All configuration goes here.
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),

    sass: {
      dist: {
        options: {
          style: 'compressed'
        },
        files: {
          'dist/css/main.min.css': 'scss/main.scss'
        }
      },
      dev: {
        options: {
          style: 'expanded'
        },
        files: {
          'dist/css/main.css': 'scss/main.scss'
        }
      }
    },

    jshint: {
      options: {
        '-W099': true,
        force: true
      },
      all: [
        'js/main.js'
      ]
    },

    concat: {  
      dist: {
        files: {
          'dist/js/main.js': [
            'js/console.js',
            'js/main.js'
          ]
        }
      }
    },

    uglify: {
      dist: {
        files: {
          'dist/js/main.min.js': ['dist/js/main.js']
        }
      }
    },

    imagemin: {
      dynamic: {
        files: [{
          expand: true,
          cwd: 'images/',
          src: ['**/*.{png,jpg,gif}'],
          dest: 'images_opt/'
        }]
      }
    },

    imageoptim: {
      pngs: {
        options: {
          jpegMini: false,
          imageAlpha: true,
          quitAfter: true
        },
        src: ['images_opt/*.png']
      },
      jpgs: {
        options: {
          jpegMini: true,
          imageAlpha: false,
          quitAfter: true
        },
        src: ['images_opt/*.jpg']
      }
    },

    modernizr: {
      dist: {
        // [REQUIRED] Path to the build you're using for development.
        'devFile' : 'js/vendor/modernizr.dev.js',
        // [REQUIRED] Path to save out the built file.
        'outputFile' : 'dist/js/vendor/modernizr.custom.js',

        // Based on default settings on http://modernizr.com/download/
        'extra' : {
          'shiv' : true,
          'printshiv' : false,
          'load' : true,
          'mq' : false,
          'cssclasses' : true
        },

        // Based on default settings on http://modernizr.com/download/
        'extensibility' : {
          'addtest' : false,
          'prefixed' : false,
          'teststyles' : false,
          'testprops' : false,
          'testallprops' : false,
          'hasevents' : false,
          'prefixes' : false,
          'domprefixes' : false
        },

        // By default, this task will crawl your project for references to Modernizr tests.
        // Set to false to disable.
        'parseFiles' : true,

        // When parseFiles = true, this task will crawl all *.js, *.css, *.scss files, except files that are in node_modules/.
        // You can override this by defining a 'files' array below.
        'files' : {
          'src': [
            'dist/js/*.js',
            'dist/css/*.css'
          ]
        }
      }
    },

    watch: {
      scripts: {
        files: [
          'js/*.js'
        ],
        tasks: ['jshint', 'concat', 'uglify'],
        options: {
          spawn: false,
        },
      },
      css: {
        files: [
          'scss/*.scss',
          'scss/**/*.scss',
          'scss/**/**/*.scss'
        ],
        tasks: ['sass'],
        options: {
          spawn: false,
        }
      }
    }

  });

  // 3. Where we tell Grunt we plan to use this plug-in.
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-modernizr');
  grunt.loadNpmTasks('grunt-contrib-imagemin');
  grunt.loadNpmTasks('grunt-imageoptim');
  grunt.loadNpmTasks('grunt-contrib-watch');

  // 4. Where we tell Grunt what to do when we type "grunt" into the terminal.
  grunt.registerTask('default', [
    'sass', 
    'jshint', 
    'concat', 
    'uglify', 
    'modernizr'
  ]);
  
  grunt.registerTask('images', [
    'imagemin', 
    'imageoptim'
  ]);

};

package.json

{
  "name": "project_name",
  "description": "Project description.",
  "version": "0.0.1",
  "devDependencies": {
    "grunt": "latest",
    "grunt-contrib-sass": "latest",
    "grunt-contrib-jshint": "latest",
    "grunt-contrib-concat": "latest",
    "grunt-contrib-uglify": "latest",
    "grunt-modernizr": "latest",
    "grunt-contrib-imagemin": "latest",
    "grunt-imageoptim": "latest",
    "grunt-contrib-watch": "latest"
  }
}