144 lines
6.2 KiB
Python
Executable File
144 lines
6.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import configparser
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import datetime
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import os
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import pprint
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import subprocess
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import sys
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cfgfile = os.path.join(os.environ['HOME'], '.arch.repoclone.ini')
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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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'--exclude=.*' # exclude files matching PATTERN
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]
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def sync(args):
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with open(os.devnull, 'w') as devnull:
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mntchk = subprocess.run(['findmnt', args['mount']], stdout = devnull, stderr = devnull)
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if mntchk.returncode != 0:
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exit('!! BAILING OUT; {0} isn\'t mounted !!'.format(args['mount']))
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if args['bwlimit'] >= 1:
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opts.insert(10, '--bwlimit=' + str(args['bwlimit'])) # limit socket I/O bandwidth
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for k in ('destination', 'logfile', 'lockfile'):
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os.makedirs(os.path.dirname(args[k]), exist_ok = True)
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paths = os.environ['PATH'].split(':')
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rsync = '/usr/bin/rsync' # set the default
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for p in paths:
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testpath = os.path.join(p, 'rsync')
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if os.path.isfile(testpath):
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rsync = testpath # in case rsync isn't in /usr/bin/rsync
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break
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cmd = [rsync] # the path to the binary
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cmd.extend(opts) # the arguments
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# TODO: implement repos here?
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cmd.append(os.path.join(args['mirror'], '.')) # the path on the remote mirror
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cmd.append(os.path.join(args['destination'], '.')) # the local destination
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if os.path.isfile(args['lockfile']):
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with open(args['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 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(args['lockfile'], 'w') as f:
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f.write(str(os.getpid()))
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with open(args['logfile'], 'a') as log:
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# try:
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# Disabled the try/except because otherwise it complains on broken symlinks. Gah!
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subprocess.call(cmd, stdout = log, stderr = subprocess.STDOUT)
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now = int(datetime.datetime.timestamp(datetime.datetime.utcnow()))
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with open(os.path.join(args['destination'], 'lastsync'), 'w') as f:
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f.write(str(now) + '\n')
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os.remove(args['lockfile'])
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# except:
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# os.remove(args['lockfile'])
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# exit('!! The rsync has failed. See {0} for more details. !!'.format(args['logfile']))
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return()
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def getDefaults():
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# Hardcoded defaults
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dflt = {'mirror': 'rsync://mirror.square-r00t.net/arch/',
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'repos': 'core,extra,community,multilib,iso/latest',
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'destination': '/srv/repos/arch',
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'mount': '/',
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'bwlimit': 0,
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'lockfile': '/var/run/repo-sync.lck',
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'logfile': '/var/log/repo/arch.log'}
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realcfg = configparser.ConfigParser(defaults = dflt)
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if not os.path.isfile(cfgfile):
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with open(cfgfile, 'w') as f:
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realcfg.write(f)
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realcfg.read(cfgfile)
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return(realcfg)
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def parseArgs():
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cfg = getDefaults()
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liveopts = cfg['DEFAULT']
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args = argparse.ArgumentParser(description = 'Synchronization for a remote Arch repository to a local one.',
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epilog = ('This program will write a default configuration file to {0} ' +
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'if one is not found.'.format(cfgfile)))
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args.add_argument('-m',
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'--mirror',
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dest = 'mirror',
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default = liveopts['mirror'],
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help = ('The upstream mirror to sync from, must be an rsync URI '+
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'(Default: {0}').format(liveopts['mirror']))
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# TODO: can we do this?
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# args.add_argument('-r',
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# '--repos',
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# dest = 'repos',
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# default = liveopts['repos'],
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# help = ('The repositories to sync; must be a comma-separated list. ' +
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# '(Currently not used.) Default: {0}').format(','.join(liveopts['repos'])))
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args.add_argument('-d',
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'--destination',
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dest = 'destination',
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default = liveopts['destination'],
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help = 'The destination directory to sync to. Default: {0}'.format(liveopts['destination']))
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args.add_argument('-b',
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'--bwlimit',
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dest = 'bwlimit',
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default = liveopts['bwlimit'],
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type = int,
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help = 'The amount, in Kilobytes per second, to throttle the sync to. Default is to not throttle (0).')
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args.add_argument('-l',
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'--log',
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dest = 'logfile',
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default = liveopts['logfile'],
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help = 'The path to the logfile. Default: {0}'.format(liveopts['logfile']))
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args.add_argument('-L',
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'--lock',
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dest = 'lockfile',
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default = liveopts['lockfile'],
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help = 'The path to the lockfile. Default: {0}'.format(liveopts['lockfile']))
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args.add_argument('-M',
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'--mount',
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dest = 'mount',
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default = liveopts['mount'],
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help = 'The mountpoint for your --destination. The script will exit if this point is not mounted. ' +
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'If you don\'t need mount checking, just use /. Default: {0}'.format(liveopts['mount']))
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return(args)
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def main():
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args = vars(parseArgs().parse_args())
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sync(args)
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if __name__ == '__main__':
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main()
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