自动下载 github 上的软件

sync-github-lastest.py

#!/usr/bin/env python3

import sys, os, subprocess, time
import re, json
from collections import namedtuple
from urllib.request import urlopen

class AddressError(Exception): pass
class DownloadError(Exception): pass

class File(namedtuple("File", "name, type, size, url, ctime, mtime")):
    def download(self, out, downloadcmd = "curl -sLo {out} {url}".split()):
        try:
            cmd = [i.format(url=self.url, out=out) for i in downloadcmd]
            subprocess.check_call(cmd)
            mtime = time.mktime(self.mtime)
            os.utime(out, (mtime, mtime))
        except Exception as err:
            raise DownloadError(str(err))

class Repo:
    _addrpat = re.compile(r"^(?:(?:https?://)?(?:www\.)?github.com/)?(?P<user>[\w-]+)/(?P<repo>[\w-]+)/?$")
    _timefmt = "%Y-%m-%dT%H:%M:%SZ"

    def __init__(self, addr):
        m = self._addrpat.match(addr)
        if m is None:
            raise AddressError(addr)
        self.user = m.group('user')
        self.repo = m.group('repo')

    def refresh(self):
        rawdata = urlopen("https://api.github.com/repos/%s/%s/releases" % (self.user, self.repo)).read().decode('utf-8')
        data = json.loads(rawdata)
        self.releases = []
        for release in data:
            files = []
            for info in release['assets']:
                name = info['name']
                type = info['content_type']
                size = info['size']
                url = info['browser_download_url']
                ctime = time.strptime(info['created_at'], self._timefmt)
                mtime = time.strptime(info['updated_at'], self._timefmt)
                files.append(File(name, type, size, url, ctime, mtime))
            self.releases.append((release['name'], files))

repos = [Repo(i) for i in sys.argv[1:]]
if len(repos) == 0:
    os.exit(1)
while True:
    for repo in repos:
        repo.refresh()
        version, files = repo.releases[0]
        file = files[0]
        out = os.path.join(os.getcwd(), repo.repo + os.path.splitext(file.name)[1])
        try:
            try:
                mtime = time.localtime(os.stat(out).st_mtime)
                if file.mtime > mtime:
                    print("%s: updating..." % repo.repo, end='', flush=True)
                    file.download(out)
                    print("done []" % version)
                else:
                    print("%s: already updated to %s" % (repo.repo, version))
            except FileNotFoundError:
                print("%s: initial syncing..." % repo.repo, end='', flush=True)
                file.download(out)
                print("done [%s]" % version)
        except DownloadError as err:
            print("failed [%s]" % err)
    time.sleep(6 * 3600)