340 lines
14 KiB
Python
Executable File
340 lines
14 KiB
Python
Executable File
#!/usr/bin/env python3
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import configparser
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import copy
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import datetime
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import importlib.util
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import os
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import platform
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import re
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import socket
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import subprocess
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import sys
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cfgfile = os.path.join(os.environ['HOME'],
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'.config',
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'optools',
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'repoclone',
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'centos.ini')
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# Set up the logger.
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_selfpath = os.path.abspath(os.path.realpath(os.path.expanduser(__file__)))
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_logmodpath = os.path.abspath(os.path.join(_selfpath,
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'..', '..', '..',
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'lib',
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'python',
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'logger.py'))
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log_spec = importlib.util.spec_from_file_location('logger', _logmodpath)
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logger = importlib.util.module_from_spec(log_spec)
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log_spec.loader.exec_module(logger)
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_loglevel = 'warning'
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#_loglevel = 'debug'
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class cur_ver(object):
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def __init__(self):
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# TODO: .dist() is deprecated, as is linux_distribution.
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# switch to distro? https://pypi.org/project/distro
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_distname = platform.dist()[0]
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if not re.search('^CentOS( Linux)?$', _distname, re.IGNORECASE):
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raise ValueError(('You have specified "{cur_ver}" in your ' +
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'config, but you are not running this script ' +
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'on CentOS!'))
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_ver = platform.dist()[1].split('.')
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self.full = '.'.join(_ver)
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self.maj = int(_ver[0])
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self.min = int(_ver[1])
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self.rev = _ver[2]
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def __str__(self):
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return(self.full)
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# Rsync options
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opts = [
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'--recursive', # recurse into directories
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'--times', # preserve modification times
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'--links', # copy symlinks as symlinks
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'--hard-links', # preserve hard links
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'--quiet', # suppress non-error messages
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'--delete-after', # receiver deletes after transfer, not during
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'--delay-updates', # put all updated files into place at end
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'--copy-links', # transform symlink into referent file/dir
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'--safe-links', # ignore symlinks that point outside the tree
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#'--max-delete', # don't delete more than NUM files
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'--delete-excluded', # also delete excluded files from dest dirs
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]
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dflts = {'DEFAULT': {'repo_name': '{name}',
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'enabled': False,
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'arches': ['i686', 'x86_64'],
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'baseuri': ('mirror.centos.org/centos/{rel_ver}/' +
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'${repo_name}/{arch}'),
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'destination': ('${mount}/centos/{rel_ver}/' +
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'${repo_name}/{arch}'),
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'mount': '/mnt/repos',
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'bwlimit': 0,
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'lockfile': '/var/run/repo-sync_{name}.lck',
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'logfile': '/var/log/repo/centos.log',
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'releases': [6, 7],
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'excludes': None},
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'base': {'repo_name': 'os',
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'enabled': True},
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'updates': {'enabled': True},
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'extras': {'enabled': True},
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'centosplus': {'enabled': True},
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'epel': {'enabled': True,
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'baseuri': ('dl.fedoraproject.org::fedora-{name}0/' +
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'{rel_ver}/{arch}'),
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'destination': '${mount}/centos/{name}/{rel_ver}/{arch}'},
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'ius': {'enabled': False,
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'baseuri': ('dl.iuscommunity.org/{name}/stable/CentOS/' +
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'{rel_ver}/{arch}')}}
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class MirrorMgr(object):
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def __init__(self):
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self.cfg = configparser.ConfigParser(
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interpolation = configparser.ExtendedInterpolation(),
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defaults = dflts['DEFAULT'],
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allow_no_value = True)
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self.strvars = {'cur_ver': None,
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'name': None,
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'arches': [],
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'releases': [],
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'cur_arch': platform.machine(),
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'rel_ver': None,
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'arch': None}
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if not os.path.isfile(cfgfile):
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self.gen_cfg()
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self.get_cfg()
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self.chk_cur_ver()
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self.parse_cfg()
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self.log = logger.log(logfile = os.path.abspath(os.path.expanduser(
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self.cfg['DEFAULT']['logfile'])),
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logname = 'optools.repoclone.centos',
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loglvl = _loglevel)
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def get_cfg(self):
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with open(cfgfile, 'r') as f:
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self.cfg_in = f.read()
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return()
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def chk_cur_ver(self):
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for line in self.cfg_in.splitlines():
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_line = line
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# Strip out inline comments -- this is disabled by default(?).
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#_line = re.sub('\s*(#|;).*$', '', line)
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# Skip empty lines/comments.
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if re.search('^\s*((#|;).*)?$', line):
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continue
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# Check to see if cur_ver is referenced.
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if re.search('^.*{cur_ver}.*$', _line):
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self.strvars['cur_ver'] = cur_ver()
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break
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return()
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def gen_cfg(self):
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cfg = configparser.ConfigParser(
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interpolation = configparser.ExtendedInterpolation(),
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defaults = dflts['DEFAULT'],
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allow_no_value = True)
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for i in dflts.keys():
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if i != 'DEFAULT':
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cfg[i] = copy.deepcopy(dflts[i])
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with open(cfgfile, 'w') as f:
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cfg.write(f)
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# And add the comment about how it's a stripped down default conf.
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with open(cfgfile, 'r+') as f:
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cfgdata = f.read()
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f.seek(0, 0)
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cmnt = ('# This is an autogenerated configuration file for ' +
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'r00t^s\'s OpTools CentOS\n# mirror script.\n# You ' +
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'should reference the fully commented version ' +
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'distributed with the script,\n# "centos.dflts.ini".\n\n')
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f.write(cmnt + cfgdata)
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print(('A configuration file has been automatically generated for ' +
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'you at {0}. You should review and customize it, because it ' +
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'most likely will not work out of the box.').format(cfgfile))
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exit('Exiting to give you the chance to customize it...')
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return()
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def parse_cfg(self):
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self.cfg.read_string(self.cfg_in)
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return()
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def sync(self):
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for repo in self.cfg.sections():
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# Skip disabled repos.
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if not self.cfg.getboolean(repo, 'enabled'):
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continue
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self.repo = copy.deepcopy(dict(self.cfg[repo]))
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self.strvars['name'] = repo
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# This should be safe since the only thing that makes sense here is
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# {cur_arch}, which we populate in __init__().
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self.strvars['arches'] = [i.strip() for i in \
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self.repo['arches'].format(
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**self.strvars).split(',')]
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self.strvars['releases'] = [i.strip() for i in \
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self.repo['releases'].format(
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**self.strvars).split(',')]
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for arch in self.strvars['arches']:
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for rel_ver in self.strvars['releases']:
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self._clear_tpl(repo, arch, rel_ver)
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self._repo_chk(repo)
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self._repo_sync(repo)
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return()
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def _clear_tpl(self, repo, arch, rel_ver):
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self.repo = copy.deepcopy(dict(self.cfg[repo]))
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self.strvars['name'] = repo
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# This should be safe since the only thing that makes sense here is
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# {cur_arch}, which we populate in __init__().
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self.strvars['arches'] = [i.strip() for i in \
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self.repo['arches'].format(
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**self.strvars).split(',')]
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self.strvars['releases'] = [i.strip() for i in \
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self.repo['releases'].format(
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**self.strvars).split(',')]
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self.strvars['arch'] = arch
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self.strvars['rel_ver'] = rel_ver
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self.strvars['name'] = repo
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self._repo_chk(repo)
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return()
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def _repo_sync(self, repo):
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# Reset the Rsync options
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self.opts = opts
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self.repo['bwlimit'] = float(self.repo['bwlimit'])
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if self.repo['bwlimit'] > 0.0:
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# limit socket I/O bandwidth
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self.opts.append('--bwlimit=' + str(self.repo['bwlimit']))
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paths = os.environ['PATH'].split(':')
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cmd = ['rsync'] # Set up a cmd list for subprocess
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cmd.extend(opts) # The arguments for rsync
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# The path on the remote mirror
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_path = os.path.join('rsync://{0}'.format(self.repo['baseuri']), '.')
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cmd.append(_path)
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# The local destination
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cmd.append(os.path.join(self.repo['destination'], '.'))
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if os.path.isfile(self.repo['lockfile']):
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with open(self.repo['lockfile'], 'r') as f:
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existingpid = f.read().strip()
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if os.isatty(sys.stdin.fileno()):
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# Running from shell
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exit(('!! A repo synchronization seems to already be ' +
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'running (PID: {0}). Quitting. !!').format(existingpid))
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else:
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exit() # We're running in cron, shut the hell up.
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else:
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with open(self.repo['lockfile'], 'w') as f:
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f.write(str(os.getpid()))
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with open(self.repo['logfile'], 'a') as log:
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c = subprocess.run(cmd, stdout = log, stderr = subprocess.PIPE)
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now = int(datetime.datetime.utcnow().timestamp())
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with open(os.path.join(self.repo['destination'],
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'lastsync'), 'w') as f:
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f.write(str(now) + '\n')
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os.remove(self.repo['lockfile'])
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# Only report errors at the end of the run if we aren't running in
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# cron. Otherwise, log them.
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errors = c.stderr.decode('utf-8').splitlines()
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# CentOS 7 main doesn't have an i686.
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if self.strvars['rel_ver'] == 7:
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for e in errors[:]:
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rgx = re.compile(('^rsync: change_dir.*/i[36]86(/|").*' +
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'failed:\s*No\s+such\s+file\s+or\s+' +
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'directory.*$'))
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if rgx.search(e):
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errors.remove(e)
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for e in errors[:]:
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if e.startswith(('rsync error: some files/attrs were not ' +
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'transferred (see previous errors)')):
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errors.remove(e)
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if os.isatty(sys.stdin.fileno()) and errors:
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print('[{0}] We encountered some errors:'.format(repo))
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for e in errors:
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if e.startswith('symlink has no referent: '):
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print(('Broken upstream symlink: ' +
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'{0}').format(e.split()[1].replace('"', '')))
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else:
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print(e)
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else:
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for e in errors:
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log.write('{0}\n'.format(e))
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return()
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def _repo_chk(self, repo):
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def chkmnt():
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self.repo['mount'] = os.path.abspath(
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os.path.expanduser(
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self.repo['mount'].format(
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**self.strvars)))
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with open(os.devnull, 'w') as devnull:
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mntchk = subprocess.run(['findmnt',
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self.repo['mount']],
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stdout = devnull,
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stderr = devnull)
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if mntchk.returncode != 0:
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raise RuntimeError(('!! BAILING OUT; {0} isn\'t ' +
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'mounted !!').format(self.repo['mount']))
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return()
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def chkrsync():
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_port = 873
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_open = False
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self.repo['baseuri'] = re.sub('^\s*rsync://',
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'',
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self.repo['baseuri'].format(
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**self.strvars),
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re.IGNORECASE)
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_raw_srv = self.repo['baseuri'].split('/')[0]
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_split_srv = re.sub('::.*$', '', _raw_srv).split(':')
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if len(_split_srv) >= 2:
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_port = _split_srv[1]
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for proto in (socket.AF_INET, socket.AF_INET6):
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s = socket.socket(proto, socket.SOCK_STREAM)
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chk = s.connect_ex((_split_srv[0], _port))
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if chk == 0:
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_open = True
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break
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if os.isatty(sys.stdin.fileno()):
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if not _open:
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raise RuntimeError(('Rsync on host {0}:{1} is not ' +
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'accessible!').format(_split_srv[0],
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_port))
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else:
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exit()
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return()
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def chkdest():
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_dest = os.path.abspath(
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os.path.expanduser(
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self.cfg[repo]['destination'].format(
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**self.strvars)))
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self.repo['destination'] = _dest
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os.makedirs(self.repo['destination'], exist_ok = True)
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return()
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def chkdest_files():
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for f in ('logfile', 'lockfile'):
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_dest = os.path.abspath(
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os.path.expanduser(
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self.repo[f].format(**self.strvars)))
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self.repo[f] = _dest
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os.makedirs(os.path.dirname(self.repo[f]), exist_ok = True)
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return()
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def chkmisc():
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# Odds and ends.
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pass
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return()
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# The Business-End(TM)
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chkmnt()
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chkrsync()
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chkdest()
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chkdest_files()
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chkmisc()
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return()
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def main():
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m = MirrorMgr()
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m.sync()
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if __name__ == '__main__':
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main()
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