Download and concatenate Linux Device Drivers (3ed.) chapters into one PDF

ldd3.py

import asyncio

chapters = [
    "TITLE",
    "COPYRIGHT",
    "ldr3TOC.fm",
    *[f"ch{index:02}" for index in range(19)],
    "ldr3IX.fm",
]


async def download(chapter):
    wget = await asyncio.create_subprocess_exec(
        "wget",
        *[
            "--quiet",
            f"https://lwn.net/images/pdf/LDD3/{chapter}.pdf"
        ]
    )
    await wget.wait()


async def main():
    await asyncio.gather(*[download(chapter) for chapter in chapters])

    paths = [f"{chapter}.pdf" for chapter in chapters]

    pdfunite = await asyncio.create_subprocess_exec("pdfunite", *paths, "ldd3.pdf")
    await pdfunite.wait()

    rm = await asyncio.create_subprocess_exec("rm", *paths)
    await rm.wait()

asyncio.run(main())