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relchk/arch.py

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#!/usr/bin/env python3
# Example .arch.json:
# {
# "date": "Fri, 01 Jan 2021 00:00:00 +0000",
# "mirror": "http://arch.mirror.constant.com/",
# "country": "US",
# "notes": "https://archlinux.org/releng/releases/2021.01.01/",
# "ver": "2021.01.01",
# "sha1": "c3082b13d3cf0a253e1322568f2fd07479f86d52"
# }
import datetime
import json
import os
import re
##
import requests
from lxml import etree
##
import _base
import arch_mirror_ranking
class Updater(_base.BaseUpdater):
_fname_re = re.compile(r'^archlinux-(?P<version>[0-9]{4}\.[0-9]{2}\.[0-9]{2})-(?P<arch>(i686|x86_64)).iso$')
_def_hash = 'sha1'
_allowed_hashes = ('md5', 'sha1')
_allowed_arches = ('x86_64', )
_datever_fmt = '%Y.%m.%d'
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arch = 'x86_64' # Arch Linux proper only offers x86_64.
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_iso_dir = 'iso/latest'
_iso_fname = 'archlinux-{ver}-{arch}.iso'
_iso_file = os.path.join(_iso_dir, _iso_fname)
_tpl_file = 'arch_grub.conf.j2'
def __init__(self,
dest_dir = '/boot/iso', # Should be subdir of boot_dir
dest_file = 'arch.iso',
ver_file = '.arch.json',
lock_path = '/tmp/.arch.lck',
feed_url = 'https://archlinux.org/feeds/releases/',
do_grub_cfg = True,
boot_dir = '/boot', # ESP or boot partition mount; where GRUB files are installed *under*
grub_cfg = '/etc/grub.d/40_custom_arch',
# check_gpg = True, # TODO: GPG sig checking
hash_type = 'sha1'):
super().__init__(dest_dir, dest_file, ver_file, lock_path, do_grub_cfg, boot_dir, grub_cfg, hash_type)
if hash_type.lower() not in self._allowed_hashes:
raise ValueError('hash_type must be one of: {0}'.format(', '.join(self._allowed_hashes)))
else:
self.hash_type = hash_type.lower()
self.feed_url = feed_url
# From the JSON.
self.rel_notes_url = None
self.mirror_base = None
self.country = None
self.ipv4 = True
self.ipv6 = False
self._init_vars()
def _init_vars(self):
if self.getRunning():
return(None)
self.getCountry()
self.getNet()
self.getCurVer()
self.getNewVer()
return(None)
def findMirror(self):
self.getCountry()
if self.mirror_base:
return(None)
mirrors = []
for p in ('http', 'https'):
m = arch_mirror_ranking.MirrorIdx(country = self.country,
proto = p,
ipv4 = self.ipv4,
ipv6 = self.ipv6,
isos = True)
mirrors.extend(m.ranked_servers)
# Find the "best" across http/https.
mirrors = sorted(mirrors, key = lambda i: i['score'])
for s in mirrors:
try:
req = requests.get(s['url'])
if req.ok:
self.mirror_base = s['url']
break
except (OSError, ConnectionRefusedError):
continue
return(None)
def getCountry(self):
if self.country: # The API has limited number of accesses for free.
return(None)
url = 'https://ipinfo.io/country'
req = requests.get(url, headers = {'User-Agent': 'curl/7.74.0'})
if not req.ok:
raise RuntimeError('Received non-200/30x {0} for {1}'.format(req.status_code, url))
self.country = req.content.decode('utf-8').strip().upper()
return(None)
def getCurVer(self):
if self.getRunning():
return(None)
if not os.path.isfile(self.dest_ver):
self.getCountry()
self.getNet()
self.findMirror()
self.do_update = True
self.force_update = True
self.old_ver = 0.00
return(None)
with open(self.dest_ver, 'rb') as fh:
ver_info = json.load(fh)
self.old_date = datetime.datetime.strptime(ver_info['date'], self._date_fmt)
self.old_ver = datetime.datetime.strptime(ver_info['ver'], self._datever_fmt)
self.old_hash = ver_info.get(self.hash_type, self._def_hash)
self.country = ver_info.get('country')
self.mirror_base = ver_info.get('mirror')
if not self.country:
self.getCountry()
if not self.mirror_base:
self.getNet()
self.findMirror()
self.new_hash = self.old_hash
self.new_ver = self.old_ver
self.new_date = self.old_date
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# if ver_info.get('arch') != self.arch:
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# self.do_update = True
# self.force_update = True
if not os.path.isfile(self.dest_iso):
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self.do_update = True
self.force_update = True
return(None)
realhash = self.getISOHash()
if self.old_hash != realhash:
self.do_update = True
self.force_update = True
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return(None)
def getNet(self):
for k in ('ipv4', 'ipv6'):
url = 'https://{0}.clientinfo.square-r00t.net'.format(k)
try:
req = requests.get(url)
setattr(self, k, req.json()['ip'])
except OSError:
setattr(self, k, False)
return(None)
def getNewVer(self):
if self.getRunning():
return(None)
if not self.mirror_base:
self.findMirror()
req = requests.get(self.feed_url, headers = {'User-Agent': 'curl/7.74.0'})
if not req.ok:
raise RuntimeError('Received non-200/30x {0} for {1}'.format(req.status_code, self.feed_url))
feed = etree.fromstring(req.content)
for item in feed.xpath('//item'):
date_xml = item.find('pubDate')
ver_xml = item.find('title')
notes_xml = item.find('link')
date = ver = notes = None
if date_xml is not None:
date = datetime.datetime.strptime(date_xml.text, self._date_fmt)
if ver_xml is not None:
ver = ver_xml.text
if notes_xml is not None:
notes = notes_xml.text
new_ver = datetime.datetime.strptime(ver, self._datever_fmt)
if not all((self.old_ver, self.old_date)) or \
(new_ver > self.old_ver) or \
(self.old_date < date):
self.do_update = True
self.new_ver = new_ver
self.new_date = date
self.rel_notes_url = notes
datever = self.new_ver.strftime(self._datever_fmt)
self.iso_url = os.path.join(self.mirror_base,
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self._iso_file.lstrip('/')).format(ver = datever, arch = self.arch)
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hash_url = os.path.join(self.mirror_base,
self._iso_dir,
'{0}sums.txt'.format(self.hash_type))
req = requests.get(hash_url, headers = {'User-Agent': 'curl/7.74.0'})
if not req.ok:
raise RuntimeError('Received non-200/30x {0} for {1}'.format(req.status_code, hash_url))
hash_lines = req.content.decode('utf-8').strip().splitlines()
tgt_fname = os.path.basename(self.iso_url)
for line in hash_lines:
if line.strip().startswith('#'):
continue
hash_str, fname = line.split()
if fname != tgt_fname:
continue
self.new_hash = hash_str.lower()
break
break
return(None)
def updateVer(self):
if self.getRunning():
return(None)
d = {'date': self.new_date.strftime(self._date_fmt),
'mirror': self.mirror_base,
'country': self.country,
'notes': self.rel_notes_url,
'ver': self.new_ver.strftime(self._datever_fmt),
self.hash_type: self.new_hash}
j = json.dumps(d, indent = 4)
with open(self.dest_ver, 'w') as fh:
fh.write(j)
fh.write('\n')
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os.chmod(self.dest_ver, 0o0644)
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return(None)
if __name__ == '__main__':
u = Updater()
u.main()