Function readFirstLine

cli.js:1600–1609

(/** @type {string} */ filepath)

  spinner.start()

  async function readFirstLine(/** @type {string} */ filepath) {
    const inputStream = fsCb.createReadStream(filepath)
    try {
      for await (const line of readline.createInterface(inputStream))
        return line
      return '' // If the file is empty.
    } finally {
      inputStream.destroy() // Destroy file stream.
    }
  }
}

function assertSchemaValidationJsonHasValidSkipTest() {