Function resolveChain

Gulpfile.ts:313–321

* Resolve a nested dependency starting from the given file

(baseUrl: string, ...packages: string[])

 * Resolve a nested dependency starting from the given file
 */
function resolveChain(baseUrl: string, ...packages: string[]) {
  const require = createRequire(baseUrl);

  return packages.reduce(
    (base, pkg) =>
      path.dirname(require.resolve(pkg + "/package.json", { paths: [base] })),
    path.dirname(fileURLToPath(baseUrl))
  );
}

// If this build is part of a pull request, include the pull request number in
// the version number.