Function writePDFJSVersion

scripts/pdf.js:250–293

(version)

}

async function writePDFJSVersion(version) {
  if (!version) {
    throw new Error(`Could not determine ${pdfJSVersionEnvName}`)
  }

  const nextLine = `${pdfJSVersionEnvName}=${trimVersionTag(version)}`
  const envText = await fs.readFile(envPath, 'utf8').catch(error => {
    if (error && error.code === 'ENOENT') {
      return ''
    }

    throw error
  })
  const lineEnding = envText.includes('\r\n') ? '\r\n' : '\n'
  const lines = envText.split(/\r?\n/)
  const envLinePattern = new RegExp(
    `^\\s*(?:export\\s+)?${escapeRegExp(pdfJSVersionEnvName)}\\s*=`
  )
  let updated = false

  for (let i = 0; i < lines.length; i++) {
    if (envLinePattern.test(lines[i])) {
      lines[i] = nextLine
      updated = true
      break
    }
  }

  if (updated) {
    await fs.outputFile(envPath, lines.join(lineEnding))
    return
  }

  const separator =
    envText && !envText.endsWith('\n') && !envText.endsWith('\r')
      ? lineEnding
      : ''
  const sectionBreak = envText ? lineEnding : ''

  await fs.outputFile(
    envPath,
    `${envText}${separator}${sectionBreak}${nextLine}${lineEnding}`
  )
}

function escapeRegExp(text) {
  return text.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')