update_manpage

#!/usr/bin/python3

import re
import shutil
import sys
import subprocess
import tempfile

COMMAND = "egt"
SECTION = 1

res = subprocess.run([sys.executable, "setup.py", "--version"], stdout=subprocess.PIPE, text=True, check=True)
version = res.stdout.strip()

res = subprocess.run([sys.executable, COMMAND, "--help"], stdout=subprocess.PIPE, text=True, check=True)
subcommands = re.sub(r"^.+\{(.+)\}.+$", r"\1", res.stdout, flags=re.DOTALL).split(",")

with tempfile.NamedTemporaryFile("wt") as tf:
    print("[>DESCRIPTION]", file=tf)

    for subcommand in subcommands:
        res = subprocess.run(
            [
                "help2man",
                "--name=" + COMMAND,
                f"--section={SECTION}",
                "--no-info",
                "--version-string=dummy",
                f"./{COMMAND} {subcommand}",
            ],
            stdout=subprocess.PIPE,
            text=True,
            check=True,
        )
        subcommand_doc = re.sub(r"^.+.SH DESCRIPTION", "", res.stdout, flags=re.DOTALL)
        print(".SH ", subcommand.upper(), " SUBCOMMAND", file=tf)
        tf.write(subcommand_doc)

    try:
        with open(f"{COMMAND}.1.in", "rt") as fd:
            shutil.copyfileobj(fd, tf)
    except FileNotFoundError:
        pass

    tf.flush()

    subprocess.run(
        [
            "help2man",
            f"--include={tf.name}",
            f"--name={COMMAND}",
            f"--section={SECTION}",
            "--no-info",
            f"--version-string={version}",
            f"--output={COMMAND}.{SECTION}",
            f"./{COMMAND}",
        ],
        check=True,
    )