Function ripGrepFileCount

src/utils/ripgrep.ts:238–273

* Stream-count lines from `rg --files` without buffering stdout. * * On large repos (e.g. 247k files, 16MB of paths), calling `ripGrep()` just * to read `.length` materializes the full stdout string plus a 247k-element * array. This counts newline bytes per chunk instead; peak memory is one * s

(
  args: string[],
  target: string,
  abortSignal: AbortSignal,
)

 * timeout (callers pass AbortSignal.timeout; spawn's signal option kills rg).
 */
async function ripGrepFileCount(
  args: string[],
  target: string,
  abortSignal: AbortSignal,
): Promise<number> {
  await codesignRipgrepIfNecessary()
  const { rgPath, rgArgs, argv0 } = ripgrepCommand()

  return new Promise<number>((resolve, reject) => {
    const child = spawn(rgPath, [...rgArgs, ...args, target], {
      argv0,
      signal: abortSignal,
      windowsHide: true,
      stdio: ['ignore', 'pipe', 'ignore'],
    })

    let lines = 0
    child.stdout?.on('data', (chunk: Buffer) => {
      lines += countCharInString(chunk, '\n')
    })

    // On Windows, both 'close' and 'error' can fire for the same process.
    let settled = false
    child.on('close', code => {
      if (settled) return
      settled = true
      if (code === 0 || code === 1) resolve(lines)
      else reject(new Error(`rg --files exited ${code}`))
    })
    child.on('error', err => {
      if (settled) return
      settled = true
      reject(err)
    })
  })
}

/**
 * Stream lines from ripgrep as they arrive, calling `onLines` per stdout chunk.