Function readFileHeader

src/utils/compression.ts:120–131

(filePath: string, bytes = XZ_MAGIC.length)

}

const readFileHeader = async (filePath: string, bytes = XZ_MAGIC.length): Promise<Buffer> => {
  const fileHandle = await open(filePath, 'r')

  try {
    const header = Buffer.alloc(bytes)
    const { bytesRead } = await fileHandle.read(header, 0, bytes, 0)

    return header.subarray(0, bytesRead)
  } finally {
    await fileHandle.close()
  }
}

export const detectCompressionFormat = async (
  filePath: string,