Allure grunt plugin

allure.js

module.exports = grunt => {
  const allure = require('allure-commandline');

  grunt.registerMultiTask('allure', 'Passes commands to allure-commandline', function() {
    const done = this.async();
    const options = this.options();
    const args = [];
    if(this.target === 'generate') {
      args.push('generate');
      if(options.clean) {
        args.push('--clean');
      }
      if(options.reportDir) {
        args.push('--report-dir');
        args.push(options.reportDir);
      }
      args.push(this.data);
    } else if(this.target === 'open') {
      args.push('open');
      args.push(options.reportDir);
    } else {
      throw new Error('Unknown target:', this.target);
    }

    const allureProcess = allure(args);
    allureProcess.on('exit', done)
  });
};