Gruntfile.js

module.exports = function ( grunt ) {

  /**
   * Load required Grunt tasks. These are installed based on the versions listed
   * in `package.json` when you do `npm install` in this directory.
   */
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-copy');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-conventional-changelog');
  grunt.loadNpmTasks('grunt-bump');
  grunt.loadNpmTasks('grunt-karma');
  grunt.loadNpmTasks('grunt-ngmin');
  grunt.loadNpmTasks('grunt-strip-code');

  /**
   * Load in our build configuration file.
   */
  var userConfig = require( './build.config.js' );


  /**
   * This is the configuration object Grunt uses to give each plugin its
   * instructions.
   */
  var taskConfig = {



    /**
     * We read in our `package.json` file so we can access the package name and
     * version. It's already there, so we don't repeat ourselves here.
     */
    pkg: grunt.file.readJSON("package.json"),

    /**
     * The banner is the comment that is placed at the top of our compiled
     * source files. It is first processed as a Grunt template, where the `<%=`
     * pairs are evaluated based on this very configuration object.
     */
    meta: {
      banner:
        '/**\n' +
        ' * <%= pkg.name %> - v<%= pkg.version %> - <%= grunt.template.today("yyyy-mm-dd") %>\n' +
        ' * <%= pkg.homepage %>\n' +
        ' *\n' +
        ' * Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author %>\n' +
        ' * Licensed <%= pkg.licenses[0].type %> <<%= pkg.licenses[0].url %>>\n' +
        ' */\n'
    },

    /**
     * Creates a changelog on a new version.
     */
    changelog: {
      options: {
        dest: 'CHANGELOG.md',
        template: 'changelog.tpl'
      }
    },

    /**
     * Increments the version number, etc.
     */
    bump: {
      options: {
        files: [
          "package.json",
          "bower.json"
        ],
        commit: false,
        commitMessage: 'chore(release): v%VERSION%',
        commitFiles: [
          "package.json",
          "client/bower.json"
        ],
        createTag: false,
        tagName: 'v%VERSION%',
        tagMessage: 'Version %VERSION%',
        push: false,
        pushTo: 'origin'
      }
    },

    /**
     * The directories to delete when `grunt clean` is executed.
     */
    clean: {
      options: { force: true },
      build: ['<%= build_dir %>']
    },


    /**
     * `grunt concat` concatenates multiple source files into a single file.
     */
    concat: {

      /**
       * The `compile_js` target is the concatenation of our application source
       * code and all specified vendor source code into a single file.
       */
      compile_js: {
        options: {
          banner: '<%= meta.banner %>'
        },
        src: [
          '<%= vendor_files.js %>',
          'module.prefix',
          '<%= app_files.js %>',
          'module.suffix'
        ],
        dest: '<%= build_dir %>/<%= pkg.name %>.js',
        mindest: '<%= build_dir %>/<%= pkg.name %>-min.js'
      }
    },


    /**
     * Minify the sources!
     */
    uglify: {
      compile: {
        options: {
          banner: '<%= meta.banner %>'
        },
        files: {
          '<%= concat.compile_js.mindest %>': '<%= concat.compile_js.dest %>'
        }
      }
    },

    strip_code: {
      options: {
        start_comment: "test-code",
        end_comment: "end-test-code"
      },
      your_target: {
        // a list of files you want to strip code from
        src: ['<%= concat.compile_js.dest %>']
      }
    },

    /**
     * `jshint` defines the rules of our linter as well as which files we
     * should check. This file, all javascript sources, and all our unit tests
     * are linted based on the policies listed in `options`. But we can also
     * specify exclusionary patterns by prefixing them with an exclamation
     * point (!); this is useful when code comes from a third party but is
     * nonetheless inside `src/`.
     */
    jshint: {
      src: [
        '<%= app_files.js %>'
      ],
      test: [
        '<%= app_files.jsunit %>'
      ],
      gruntfile: [
        'Gruntfile.js'
      ],
      options: {
        curly: true,
        immed: true,
        newcap: true,
        noarg: true,
        sub: true,
        boss: true,
        eqnull: true,
        '-W053': true,
        '-W103': true
      },
      globals: {}
    },

    /**
     * The Karma configurations.
     */
    karma: {
      options: {
        configFile: '<%= build_dir %>/karma-unit.js'
      },
      unit: {
        runnerPort: 9111,
        background: true
      },
      continuous: {
        singleRun: true,
        browsers: ["PhantomJS"]
      }
    },


    /**
     * This task compiles the karma template so that changes to its file array
     * don't have to be managed manually.
     */
    karmaconfig: {
      unit: {
        dir: '<%= build_dir %>',
        src: [
          '<%= test_files.js %>'
        ]
      }
    },

    /**
     * And for rapid development, we have a watch set up that checks to see if
     * any of the files listed below change, and then to execute the listed
     * tasks when they do. This just saves us from having to type "grunt" into
     * the command-line every time we want to see what we're working on; we can
     * instead just leave "grunt watch" running in a background terminal. Set it
     * and forget it, as Ron Popeil used to tell us.
     *
     * But we don't need the same thing to happen for all the files.
     */
    delta: {
      /**
       * By default, we want the Live Reload to work for all tasks; this is
       * overridden in some tasks (like this file) where browser resources are
       * unaffected. It runs by default on port 35729, which your browser
       * plugin should auto-detect.
       */
      options: {
        livereload: true
      },

      /**
       * When the Gruntfile changes, we just want to lint it. In fact, when
       * your Gruntfile changes, it will automatically be reloaded!
       */
      gruntfile: {
        files: 'Gruntfile.js',
        tasks: [ 'jshint:gruntfile' ],
        options: {
          livereload: false
        }
      },

      /**
       * When our JavaScript source files change, we want to run lint them and
       * run our unit tests.
       */
      jssrc: {
        files: [
          '<%= app_files.js %>'
        ],
        tasks: [ 'jshint:src', 'karma:unit:run', 'copy:build_appjs' ]
      },

      /**
       * When a JavaScript unit test file changes, we only want to lint it and
       * run the unit tests. We don't want to do any live reloading.
       */
      jsunit: {
        files: [
          '<%= app_files.jsunit %>'
        ],
        tasks: [ 'jshint:test', 'karma:unit:run' ],
        options: {
          livereload: false
        }
      }
    }
  };

  grunt.initConfig( grunt.util._.extend( taskConfig, userConfig ) );

  /**
   * In order to make it safe to just compile or copy *only* what was changed,
   * we need to ensure we are starting from a clean, fresh build. So we rename
   * the `watch` task to `delta` (that's why the configuration var above is
   * `delta`) and then add a new task called `watch` that does a clean build
   * before watching for changes.
   */
  grunt.renameTask( 'watch', 'delta' );
  grunt.registerTask( 'watch', [ 'build', 'karma:unit', 'delta' ] );

  /**
   * The default task is to build and compile.
   */
  grunt.registerTask( 'default', [ 'build' ] );

  /**
   * The `build` task gets your app ready to run for development and testing.
   */
  grunt.registerTask( 'build', [
    'clean', 'concat:compile_js', 'jshint', 'karmaconfig',
    'karma:continuous', 'strip_code', 'uglify'
  ]);


  /**
   * A utility function to get all app JavaScript sources.
   */
  function filterForJS ( files ) {
    return files.filter( function ( file ) {
      return file.match( /\.js$/ );
    });
  }

  /**
   * In order to avoid having to specify manually the files needed for karma to
   * run, we use grunt to manage the list for us. The `karma/*` files are
   * compiled as grunt templates for use by Karma. Yay!
   */
  grunt.registerMultiTask( 'karmaconfig', 'Process karma config templates', function () {
    var jsFiles = filterForJS( this.filesSrc );
    console.log(jsFiles);
    grunt.file.copy( 'karma/karma-unit.tpl.js', grunt.config( 'build_dir' ) + '/karma-unit.js', {
      process: function ( contents, path ) {
        return grunt.template.process( contents, {
          data: {
            scripts: jsFiles
          }
        });
      }
    });
  });

};