@transact-open-ux/cli/lib/utils/env.js

Command line for rapid development/deployment on the Transact Platform

/**
 * @license
 * Copyright (c) 2019 Avoka Technologies Pty Limited
 *
 * 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 path = require("path");
const fs = require("fs");
const { execSync } = require("child_process");
let hasYarn;

exports.isYarnProject = cwd =>
  fs.existsSync(path.resolve(cwd || process.cwd(), "yarn.lock"));

exports.hasYarn = () => {
  if (hasYarn != null) return hasYarn;

  try {
    execSync("yarnpkg --version", { stdio: "ignore" });
    return (hasYarn = true);
  } catch (e) {
    return (hasYarn = false);
  }
};