Function checkNodeVersion

build-system/common/check-package-manager.js:103–165

* Check the node version and print a warning if it is not the latest LTS. * * @return {Promise }

()

 * @return {Promise<void>}
 **/
function checkNodeVersion() {
  const nodeVersion = getStdout('node --version').trim();
  return new Promise((resolve) => {
    https
      .get(nodeDistributionsUrl, (res) => {
        res.setEncoding('utf8');
        let distributions = '';
        res.on('data', (data) => {
          distributions += data;
        });
        res.on('end', () => {
          const distributionsJson = JSON.parse(distributions);
          const latestLtsVersion = getNodeLatestLtsVersion(distributionsJson);
          if (latestLtsVersion === '') {
            console.log(
              yellow(
                'WARNING: Something went wrong. ' +
                  'Could not determine the latest LTS version of node.'
              )
            );
          } else if (nodeVersion !== latestLtsVersion) {
            console.log(
              yellow('WARNING: Detected node version'),
              cyan(nodeVersion) +
                yellow('. Recommended (latest LTS) version is'),
              cyan(latestLtsVersion) + yellow('.')
            );
            console.log(
              yellow('⤷ To fix this, run'),
              cyan('"nvm install --lts"'),
              yellow('or see'),
              cyan('https://nodejs.org/en/download/package-manager'),
              yellow('for instructions.')
            );
            updatesNeeded.add('node');
          } else {
            console.log(
              green('Detected'),
              cyan('node'),
              green('version'),
              cyan(nodeVersion + ' (latest LTS)') + green('.')
            );
          }
          resolve();
        });
      })
      .on('error', () => {
        console.log(
          yellow(
            'WARNING: Something went wrong. ' +
              'Could not download node version info from ' +
              cyan(nodeDistributionsUrl) +
              yellow('.')
          )
        );
        console.log(
          yellow('⤷ Detected node version'),
          cyan(nodeVersion) + yellow('.')