Function getPDFPageCount

src/utils/pdf.ts:119–135

(
  filePath: string,
)

 * Returns `null` if pdfinfo is not available or if the page count cannot be determined.
 */
export async function getPDFPageCount(
  filePath: string,
): Promise<number | null> {
  const { code, stdout } = await execFileNoThrow('pdfinfo', [filePath], {
    timeout: 10_000,
    useCwd: false,
  })
  if (code !== 0) {
    return null
  }
  const match = /^Pages:\s+(\d+)/m.exec(stdout)
  if (!match) {
    return null
  }
  const count = parseInt(match[1]!, 10)
  return isNaN(count) ? null : count
}

export type PDFExtractPagesResult = {
  type: 'parts'