Function promptUser

apps/cli/src/update-checker.ts:89–159

(question: string, choices: string[])

}

function promptUser(question: string, choices: string[]): Promise<number> {
  return new Promise((resolve) => {
    let selected = 0

    const render = () => {
      // Move cursor up to rewrite choices (skip on first draw)
      if (rendered) process.stderr.write(`\x1b[${choices.length}A`)
      choices.forEach((c, i) => {
        process.stderr.write(`\x1b[2K${i === selected ? '› ' : '  '}${i + 1}. ${c}\n`)
      })
    }

    process.stderr.write(`${question}\n\n`)

    if (!process.stdin.isTTY || !process.stdin.setRawMode) {
      resolve(2)
      return
    }

    let rendered = false
    render()
    rendered = true
    process.stderr.write('\n')

    process.stdin.setRawMode(true)
    process.stdin.resume()

    const cleanup = () => {
      process.stdin.removeListener('data', onData)
      process.stdin.setRawMode!(false)
      process.stdin.pause()
    }

    const onData = (data: Buffer) => {
      const key = data.toString()
      if (key === '\x03') {
        cleanup()
        process.exit(0)
      }
      // Arrow up / k
      if (key === '\x1b[A' || key === 'k') {
        selected = (selected - 1 + choices.length) % choices.length
        render()
        return
      }
      // Arrow down / j
      if (key === '\x1b[B' || key === 'j') {
        selected = (selected + 1) % choices.length
        render()
        return
      }
      // Enter — confirm current selection
      if (key === '\r' || key === '\n') {
        cleanup()
        process.stderr.write('\n')
        resolve(selected + 1)
        return
      }