Source code for pylorax.api.yumbase

#
# Copyright (C) 2017  Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# pylint: disable=bad-preconf-access

import logging
log = logging.getLogger("lorax-composer")

import ConfigParser
from fnmatch import fnmatchcase
from glob import glob
import os
import yum
# This is a hack to short circuit yum's internal logging
yum.logginglevels._added_handlers = True

from pylorax.sysutils import joinpaths

[docs]def get_base_object(conf): """Get the Yum object with settings from the config file :param conf: configuration object :type conf: ComposerParser :returns: A Yum base object :rtype: YumBase """ cachedir = os.path.abspath(conf.get("composer", "cache_dir")) yumconf = os.path.abspath(conf.get("composer", "yum_conf")) yumroot = os.path.abspath(conf.get("composer", "yum_root")) repodir = os.path.abspath(conf.get("composer", "repo_dir")) c = ConfigParser.ConfigParser() # add the main section section = "main" data = {"cachedir": cachedir, "keepcache": 0, "gpgcheck": 0, "plugins": 0, "assumeyes": 1, "reposdir": "", "tsflags": "nodocs"} if conf.get_default("yum", "proxy", None): data["proxy"] = conf.get("yum", "proxy") if conf.has_option("yum", "sslverify") and not conf.getboolean("yum", "sslverify"): data["sslverify"] = "0" c.add_section(section) map(lambda (key, value): c.set(section, key, value), data.items()) # write the yum configuration file with open(yumconf, "w") as f: c.write(f) # create the yum base object yb = yum.YumBase() yb.preconf.fn = yumconf yb.preconf.root = yumroot if not os.path.isdir(yb.preconf.root): os.makedirs(yb.preconf.root) _releasever = conf.get_default("composer", "releasever", None) if not _releasever: distroverpkg = ['system-release(releasever)', 'redhat-release'] # Use yum private function to guess the releasever _releasever = yum.config._getsysver("/", distroverpkg) log.info("releasever = %s", _releasever) yb.preconf.releasever = _releasever # Turn on as much yum logging as we can yb.preconf.debuglevel = 6 yb.preconf.errorlevel = 6 yb.logger.setLevel(logging.DEBUG) yb.verbose_logger.setLevel(logging.DEBUG) # Gather up all the available repo files, add the ones matching "repos":"enabled" patterns enabled_repos = conf.get("repos", "enabled").split(",") repo_files = glob(joinpaths(repodir, "*.repo")) if not conf.has_option("repos", "use_system_repos") or conf.getboolean("repos", "use_system_repos"): repo_files.extend(glob("/etc/yum.repos.d/*.repo")) for repo_file in repo_files: name = os.path.basename(repo_file)[:-5] if any(map(lambda pattern: fnmatchcase(name, pattern), enabled_repos)): # pylint: disable=cell-var-from-loop yb.getReposFromConfigFile(repo_file) # Update the metadata from the enabled repos to speed up later operations log.info("Updating yum repository metadata") for r in yb.repos.sort(): r.metadata_expire = 0 r.mdpolicy = "group:all" yb.doRepoSetup() yb.repos.doSetup() yb.repos.populateSack(mdtype='all', cacheonly=1) return yb