Function copyWorkerScript

cli/init.js:110–139

* @param {string} destination * @param {string} cwd * @returns {Promise }

(destination, cwd)

 * @returns {Promise<string>}
 */
async function copyWorkerScript(destination, cwd) {
  // When running as a part of "postinstall" script, "cwd" equals the library's directory.
  // The "postinstall" script resolves the right absolute public directory path.
  const absolutePublicDir = toAbsolutePath(destination, cwd)

  if (!fs.existsSync(absolutePublicDir)) {
    await fs.promises
      .mkdir(absolutePublicDir, { recursive: true })
      .catch((error) => {
        throw new Error(
          invariant(
            false,
            'Failed to copy the worker script at "%s": directory does not exist and could not be created.\nMake sure to include a relative path to the public directory of your application.\n\nSee the original error below:\n\n%s',
            absolutePublicDir,
            error,
          ),
        )
      })
  }

  // eslint-disable-next-line no-console
  console.log('Copying the worker script at "%s"...', absolutePublicDir)

  const workerFilename = path.basename(SERVICE_WORKER_BUILD_PATH)
  const workerDestinationPath = path.resolve(absolutePublicDir, workerFilename)

  fs.copyFileSync(SERVICE_WORKER_BUILD_PATH, workerDestinationPath)

  return workerDestinationPath
}

/**
 * @param {Array<string>} paths