Function ensureHeader

packages/cli/generators/copyright/header.js:147–164

* Ensure the file is updated with the correct header * @param {string} file - JS/TS file * @param {object} pkg - Package json object * @param {object} options - Options

(file, pkg, options = {})

 * @param {object} options - Options
 */
async function ensureHeader(file, pkg, options = {}) {
  const fs = options.fs || FSE;
  const header = await formatHeader(file, pkg, options);
  debug('Header: %s', header);
  const current = await fs.read(file, 'utf8');
  const content = mergeHeaderWithContent(
    header,
    current,
    options.customLicenseLines,
  );
  if (!options.dryRun) {
    await fs.write(file, content, 'utf8');
  } else {
    const log = options.log || console.log;
    log(file, header);
  }
  return content;
}

/**
 * Merge header with file content