update the AUR spotify package based on upstream changes

update-package.py

#!/usr/bin/env python3

import os
import re
import requests
import subprocess
import sys

from pprint import pprint


def get_latest_release():
    url = "http://repository.spotify.com/dists/testing/non-free/binary-amd64/Packages"
    resp = requests.get(url)
    resp.raise_for_status()
    version = githash = None
    for line in resp.text.splitlines():
        if line.startswith("Version:"):
            string = line[9:].strip()
            pattern = r"(?P<epoch>[^:]*):(?P<version>[0-9]*.[0-9]*.[0-9]*.[0-9]*).(?P<githash>.*)"
            m = re.match(pattern, string)
            version = m.group("version")
            githash = m.group("githash")
    return version, githash


def update_pkgbuild(version, githash):
    updated = []
    with open("PKGBUILD", mode="r") as handle:
        contents = handle.read()
    for line in contents.splitlines():
        if line.startswith("pkgver="):
            line = f"pkgver={version}"
        elif line.startswith("_commit="):
            line = f"_commit={githash}"
        updated.append(line + "\n")
    with open("PKGBUILD", mode="w") as handle:
        handle.writelines(updated)
    # ensure the sha256sums are updated
    updpkgsums_cmd = ["updpkgsums"]
    subprocess.call(updpkgsums_cmd, shell=False)
    # ensure .SRCINFO is updated
    makepkg_cmd = ["makepkg", "--printsrcinfo"]
    with open(".SRCINFO", mode="w") as handle:
        subprocess.call(makepkg_cmd, stdout=handle, shell=False)


def main():
    version, githash = get_latest_release()
    if not version or not githash:
        raise AssertionError()
    update_pkgbuild(version, githash)


if __name__ == "__main__":
    main()