nixpkgs-plugin-update: use nix-prefetch-github (#510947)

  buildPythonApplication,

  makeWrapper,

  nix,

  nix-prefetch-github,

  nix-prefetch-git,

  nurl,

  python3Packages,

    makeWrapperArgs+=( --prefix PATH : "${

      lib.makeBinPath [

        nix

        nix-prefetch-github

        nix-prefetch-git

        neovim-unwrapped

        nurl

import time

import traceback

import urllib.error

import urllib.parse

import urllib.request

import xml.etree.ElementTree as ET

from dataclasses import asdict, dataclass

from pathlib import Path

from tempfile import NamedTemporaryFile

from typing import Any, Callable

from urllib.parse import urljoin, urlparse

from urllib.parse import urljoin, urlparse, urlsplit

import git

from packaging.version import InvalidVersion, parse as parse_version

        response_url = req.geturl()

        if url != response_url:

            new_owner, new_name = (

                urllib.parse.urlsplit(response_url).path.strip("/").split("/")[:2]

                urlsplit(response_url).path.strip("/").split("/")[:2]

            )

            new_repo = RepoGitHub(owner=new_owner, repo=new_name, branch=self.branch)

        return sha256

    def prefetch_github(self, ref: str) -> str:

        cmd = ["nix-prefetch-url", "--unpack", self.url(f"archive/{ref}.tar.gz")]

        cmd = ["nix-prefetch-github", self.owner, self.repo, "--rev", ref, "--json"]

        log.debug("Running %s", cmd)

        data = subprocess.check_output(cmd)

        return data.strip().decode("utf-8")

        loaded = json.loads(data)

        return loaded["hash"]

    def as_nix(self, plugin: "Plugin") -> str:

        if plugin.has_submodules: