Audio Anaylzer: Sample gruntfile.js for Sass Automation

gruntfile.js

/**
 * gruntfile.js
 *
 * This file automates Sass, Uglify, and Imagemin
 */

module.exports = function (grunt) {

  grunt.initConfig({

  // Watch task configuration
    watch: {
      css: {
        files: '../src/scss/*.scss',
        tasks: ['sass'],
      },
      js: {
        files: '../src/js/*.js',
        tasks: ['uglify'],
      },
      img: {
        files: '../src/img/*.{png,jpg,gif}',
        tasks: ['imagemin'],
      },
    },

  // Sass task configuration
    sass: {
      dist: {
        files: [{
          expand: true,               // enable dynamic expansion
          cwd: '../src/scss/',
          src: ['**/*.scss'],
          dest: '../assets/css/',
          ext: '.min.css',            // dest filepaths will have this extension
          extDot: 'first',            // extensions in filenames begin after the first dot
        }],
        options: {
          style: 'compressed'
        },
      },
    },

  // Uglify task configuration
    uglify: {
      my_target: {
        files: [{
          expand: true,               // enable dynamic expansion
          cwd: '../src/js/',
          src: ['**/*.js'],
          dest: '../assets/js/',
          ext: '.min.js',             // dest filepaths will have this extension
          extDot: 'last',             // extensions in filenames begin after the last dot
        }],
      },
    },

  // Imagemin task configuration
    imagemin: {
      dynamic: {
        files: [{
          expand: true,               // enable dynamic expansion
          cwd: '../src/img/',
          src: ['**/*.{png,jpg,gif}'],
          dest: '../assets/img/',
        }],
      },
    },

  });

  // Load Plug-ins
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-imagemin');

  // Register Tasks: used as commands
  grunt.registerTask('build-sass', ['sass', 'watch']);
  grunt.registerTask('build-uglify', ['uglify', 'watch']);
  grunt.registerTask('build-imagemin', ['imagemin', 'watch']);
  grunt.registerTask('default', ['sass', 'uglify', 'imagemin', 'watch']);
};