Function extractZip

scripts/postinstall.cjs:116–152

(buffer, binaryPath, extractedBinary)

}

async function extractZip(buffer, binaryPath, extractedBinary) {
  const dir = path.dirname(binaryPath)
  let fflateError
  try {
    const { unzipSync } = require('fflate')
    const unzipped = unzipSync(new Uint8Array(buffer))
    const key = findZipEntryKey(unzipped, extractedBinary)
    if (!key) throw new Error(`Binary ${extractedBinary} not found in zip`)
    writeFileSync(binaryPath, Buffer.from(unzipped[key]))
    return
  } catch (e) { fflateError = e }
  const tmpDir = path.join(dir, '.tmp-download')
  rmSync(tmpDir, { recursive: true, force: true })
  mkdirSync(tmpDir, { recursive: true })
  try {
    const archivePath = path.join(tmpDir, 'archive.zip')
    writeFileSync(archivePath, buffer)
    let extracted = false
    if (process.platform === 'win32') {
      const psCmd = `Expand-Archive -Path '${archivePath.replace(/'/g, "''")}' -DestinationPath '${tmpDir.replace(/'/g, "''")}' -Force`
      const r = spawnSync('powershell.exe', ['-NoProfile', '-NonInteractive', '-ExecutionPolicy', 'Bypass', '-Command', psCmd], { stdio: 'pipe', windowsHide: true })
      if (r.status === 0) extracted = true
    }
    if (!extracted) {
      const r = spawnSync('unzip', ['-o', archivePath, '-d', tmpDir], { stdio: 'pipe' })
      if (r.status !== 0) {
        const unzipErr = r.stderr?.toString().trim() || 'command not found'
        throw new Error(`zip extraction failed (fflate: ${fflateError instanceof Error ? fflateError.message : String(fflateError)}; unzip: ${unzipErr})`)
      }
    }
    const srcBinary = path.join(tmpDir, extractedBinary)
    if (!existsSync(srcBinary)) throw new Error(`Binary not found at expected path: ${srcBinary}`)
    renameSync(srcBinary, binaryPath)
  } finally {
    rmSync(tmpDir, { recursive: true, force: true })
  }
}

async function extractTarGz(buffer, binaryPath, extractedBinary, assetName) {
  const dir = path.dirname(binaryPath)