gulpfile.js

/*
  Copyright 2018 Google LLC

  Use of this source code is governed by an MIT-style
  license that can be found in the LICENSE file or at
  https://opensource.org/licenses/MIT.
*/

const fse = require('fs-extra');
const globby = require('globby');
const minimist = require('minimist');
const upath = require('upath');

const options = minimist(process.argv.slice(2));

if (options.package) {
  // Ensure the package is valid before running tasks
  try {
    fse.statSync(upath.join(__dirname, 'packages', options.package));
  } catch (err) {
    throw new Error(`The supplied package '${options.package}' is invalid.`);
  }
}

global.port = options.port || 3000;
global.packageOrStar = options.package || '*';
global.cliOptions = options;

const taskFiles = globby.sync('./gulp-tasks/*.js');

for (const taskFile of taskFiles) {
  const taskDefinitions = require(taskFile);
  for (const [name, task] of Object.entries(taskDefinitions)) {
    if (name === 'functions') {
      continue;
    }
    if (name in module.exports) {
      throw new Error(
        `Duplicate task definition: ${name} defined in` +
          ` ${taskFile} conflicts with another task.`,
      );
    }
    module.exports[name] = task;
  }
}