195 lines
5.1 KiB
Python
195 lines
5.1 KiB
Python
#! /usr/bin/python
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# -*-coding:utf-8 -*-
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import io
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import os
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import glob
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import sys
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import argparse
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import collections
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import warnings
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import pyalpm
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class InvalidSyntax(Warning):
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def __init__(self, filename, problem, arg):
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self.filename = filename
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self.problem = problem
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self.arg = arg
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def __str__(self):
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return "unable to parse %s, %s: %r" % (self.filename, self.problem, self.arg)
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# Options that may occur several times in a section. Their values should be
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# accumulated in a list.
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LIST_OPTIONS = (
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'CacheDir',
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'HoldPkg',
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'SyncFirst',
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'IgnoreGroup',
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'IgnorePkg',
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'NoExtract',
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'NoUpgrade',
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'Server'
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)
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SINGLE_OPTIONS = (
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'RootDir',
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'DBPath',
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'GPGDir',
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'LogFile',
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'Architecture',
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'XferCommand',
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'CleanMethod',
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'SigLevel'
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)
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BOOLEAN_OPTIONS = (
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'UseSyslog',
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'ShowSize',
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'UseDelta',
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'TotalDownload',
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'CheckSpace',
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'VerbosePkgLists',
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'ILoveCandy'
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)
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def pacman_conf_enumerator(path):
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filestack = []
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current_section = None
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filestack.append(open(path))
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while len(filestack) > 0:
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f = filestack[-1]
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line = f.readline()
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if len(line) == 0:
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# end of file
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filestack.pop()
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continue
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line = line.strip()
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if len(line) == 0: continue
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if line[0] == '#':
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continue
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if line[0] == '[' and line[-1] == ']':
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current_section = line[1:-1]
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continue
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if current_section is None:
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raise InvalidSyntax(f.name, 'statement outside of a section', line)
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# read key, value
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key, equal, value = [x.strip() for x in line.partition('=')]
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# include files
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if equal == '=' and key == 'Include':
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filestack.extend(open(f) for f in glob.glob(value))
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continue
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if current_section != 'options':
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# repos only have the Server option
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if key == 'Server' and equal == '=':
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yield (current_section, 'Server', value)
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elif key == 'SigLevel' and equal == '=':
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yield (current_section, 'SigLevel', value)
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else:
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raise InvalidSyntax(f.name, 'invalid key for repository configuration', line)
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continue
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if equal == '=':
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if key in LIST_OPTIONS:
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for val in value.split():
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yield (current_section, key, val)
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elif key in SINGLE_OPTIONS:
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yield (current_section, key, value)
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else:
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warnings.warn(InvalidSyntax(f.name, 'unrecognized option', key))
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else:
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if key in BOOLEAN_OPTIONS:
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yield (current_section, key, True)
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else:
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warnings.warn(InvalidSyntax(f.name, 'unrecognized option', key))
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class PacmanConfig(object):
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def __init__(self, conf = None, options = None):
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self.options = {}
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self.repos = collections.OrderedDict()
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self.options["RootDir"] = "/"
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self.options["DBPath"] = "/var/lib/pacman"
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self.options["GPGDir"] = "/etc/pacman.d/gnupg/"
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self.options["LogFile"] = "/var/log/pacman.log"
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self.options["Architecture"] = os.uname()[-1]
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if conf is not None:
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self.load_from_file(conf)
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if options is not None:
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self.load_from_options(options)
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def load_from_file(self, filename):
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for section, key, value in pacman_conf_enumerator(filename):
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if section == 'options':
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if key == 'Architecture' and value == 'auto':
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continue
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if key in LIST_OPTIONS:
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self.options.setdefault(key, []).append(value)
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else:
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self.options[key] = value
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else:
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servers = self.repos.setdefault(section, [])
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if key == 'Server':
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servers.append(value)
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if "CacheDir" not in self.options:
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self.options["CacheDir"]= ["/var/cache/pacman/pkg"]
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def load_from_options(self, options):
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global _logmask
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if options.root is not None:
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self.options["RootDir"] = options.root
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if options.dbpath is not None:
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self.options["DBPath"] = options.dbpath
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if options.gpgdir is not None:
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self.options["GPGDir"] = options.gpgdir
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if options.arch is not None:
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self.options["Architecture"] = options.arch
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if options.logfile is not None:
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self.options["LogFile"] = options.logfile
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if options.cachedir is not None:
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self.options["CacheDir"] = [option.cachedir]
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if options.debug:
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_logmask = 0xffff
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def apply(self, h):
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h.arch = self.options["Architecture"]
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h.logfile = self.options["LogFile"]
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h.gpgdir = self.options["GPGDir"]
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h.cachedirs = self.options["CacheDir"]
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if "IgnoreGroup" in self.options:
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h.ignoregrps = self.options["IgnoreGroup"]
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if "IgnorePkg" in self.options:
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h.ignorepkgs = self.options["IgnorePkg"]
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if "NoExtract" in self.options:
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h.noextracts = self.options["NoExtract"]
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if "NoUpgrade" in self.options:
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h.noupgrades = self.options["NoUpgrade"]
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# set sync databases
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for repo, servers in self.repos.items():
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db = h.register_syncdb(repo, 0)
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db_servers = []
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for rawurl in servers:
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url = rawurl.replace("$repo", repo)
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url = url.replace("$arch", self.options["Architecture"])
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db_servers.append(url)
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db.servers = db_servers
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def initialize_alpm(self):
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h = pyalpm.Handle(self.options["RootDir"], self.options["DBPath"])
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self.apply(h)
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return h
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def __str__(self):
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return("PacmanConfig(options=%s, repos=%s)" % (str(self.options), str(self.repos)))
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pacman_conf = PacmanConfig(conf = "/etc/pacman.conf")
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handle = pacman_conf.initialize_alpm()
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holpkg = None
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syncfirst = None
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if 'HoldPkg' in pacman_conf.options:
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holdpkg = pacman_conf.options['HoldPkg']
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if 'SyncFirst' in pacman_conf.options:
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syncfirst = pacman_conf.options['SyncFirst']
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