Gruntfile.js

//
//  Copyright 2018 Draios Inc.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
const fs = require('fs');

module.exports = function(grunt) {

  require('load-grunt-tasks')(grunt);

  grunt.loadNpmTasks('grunt-execute');
  grunt.loadNpmTasks('grunt-contrib-clean');

  const version = fs.readFileSync('VERSION').toString().trim();

  grunt.initConfig({

    clean: ['dist'],

    copy: {
      src_to_dist: {
        cwd: 'src',
        expand: true,
        src: ['**/*', '!**/*.js', '!**/*.scss'],
        dest: 'dist'
      },
      pluginDef: {
        expand: true,
        src: ['README.md'],
        dest: 'dist'
      }
    },

    replace: {
      dist: {
        options: {
          patterns: [
            {
              json: {
                version
              }
            }
          ]
        },
        files: [
          {
            expand: true,
            flatten: true,
            src: ['src/plugin.json'], 
            dest: 'dist/'
          }
        ]
      }
    },

    watch: {
      rebuild_all: {
        files: ['src/**/*'],
        tasks: ['default'],
        options: {spawn: false}
      }
    },

    babel: {
      options: {
        sourceMap: true,
        presets:  ['es2015']
      },
      dist: {
        options: {
          plugins: ['transform-es2015-modules-systemjs', 'transform-es2015-for-of']
        },
        files: [{
          cwd: 'src',
          expand: true,
          src: ['**/*.js'],
          dest: 'dist',
          ext:'.js'
        }]
      },
      distTestNoSystemJs: {
        files: [{
          cwd: 'src',
          expand: true,
          src: ['**/*.js'],
          dest: 'dist/test',
          ext:'.js'
        }]
      },
      distTestsSpecsNoSystemJs: {
        files: [{
          expand: true,
          cwd: 'spec',
          src: ['**/*.js'],
          dest: 'dist/test/spec',
          ext:'.js'
        }]
      }
    },

    mochaTest: {
      test: {
        options: {
          reporter: 'spec'
        },
        src: ['dist/test/spec/test-main.js', 'dist/test/spec/*_spec.js']
      }
    }
  });

  grunt.registerTask('default', ['clean', 'copy:src_to_dist', 'copy:pluginDef', 'replace', 'babel', 'mochaTest']);
};