Source code for pylorax.dnfbase

# Copyright (C) 2018 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/>.
#
import logging
log = logging.getLogger("pylorax")

import dnf
import os
import shutil

from pylorax import DEFAULT_PLATFORM_ID
from pylorax.sysutils import flatconfig

[docs]def get_dnf_base_object(installroot, sources, mirrorlists=None, repos=None, enablerepos=None, disablerepos=None, tempdir="/var/tmp", proxy=None, releasever="34", cachedir=None, logdir=None, sslverify=True, dnfplugins=None): """ Create a dnf Base object and setup the repositories and installroot :param string installroot: Full path to the installroot :param list sources: List of source repo urls to use for the installation :param list enablerepos: List of repo names to enable :param list disablerepos: List of repo names to disable :param list mirrorlist: List of mirrors to use :param string tempdir: Path of temporary directory :param string proxy: http proxy to use when fetching packages :param string releasever: Release version to pass to dnf :param string cachedir: Directory to use for caching packages :param bool noverifyssl: Set to True to ignore the CA of ssl certs. eg. use self-signed ssl for https repos. If tempdir is not set /var/tmp is used. If cachedir is None a dnf.cache directory is created inside tmpdir """ def sanitize_repo(repo): """Convert bare paths to file:/// URIs, and silently reject protocols unhandled by yum""" if repo.startswith("/"): return "file://{0}".format(repo) elif any(repo.startswith(p) for p in ('http://', 'https://', 'ftp://', 'file://')): return repo else: return None mirrorlists = mirrorlists or [] # sanitize the repositories sources = list(sanitize_repo(r) for r in sources) mirrorlists = list(sanitize_repo(r) for r in mirrorlists) # remove invalid repositories sources = list(r for r in sources if r) mirrorlists = list(r for r in mirrorlists if r) if not cachedir: cachedir = os.path.join(tempdir, "dnf.cache") if not os.path.isdir(cachedir): os.mkdir(cachedir) if not logdir: logdir = os.path.join(tempdir, "dnf.logs") if not os.path.isdir(logdir): os.mkdir(logdir) dnfbase = dnf.Base() # Enable DNF pluings # NOTE: These come from the HOST system's environment if dnfplugins: if dnfplugins[0] == "*": # Enable them all dnfbase.init_plugins() else: # Only enable the listed plugins dnfbase.init_plugins(disabled_glob=["*"], enable_plugins=dnfplugins) conf = dnfbase.conf conf.logdir = logdir conf.cachedir = cachedir conf.install_weak_deps = False conf.releasever = releasever conf.installroot = installroot conf.prepend_installroot('persistdir') # this is a weird 'AppendOption' thing that, when you set it, # actually appends. Doing this adds 'nodocs' to the existing list # of values, over in libdnf, it does not replace the existing values. conf.tsflags = ['nodocs'] # Log details about the solver conf.debug_solver = True if proxy: conf.proxy = proxy if sslverify == False: conf.sslverify = False # DNF 3.2 needs to have module_platform_id set, otherwise depsolve won't work correctly if not os.path.exists("/etc/os-release"): log.warning("/etc/os-release is missing, cannot determine platform id, falling back to %s", DEFAULT_PLATFORM_ID) platform_id = DEFAULT_PLATFORM_ID else: os_release = flatconfig("/etc/os-release") platform_id = os_release.get("PLATFORM_ID", DEFAULT_PLATFORM_ID) log.info("Using %s for module_platform_id", platform_id) conf.module_platform_id = platform_id # Add .repo files if repos: reposdir = os.path.join(tempdir, "dnf.repos") if not os.path.isdir(reposdir): os.mkdir(reposdir) for r in repos: shutil.copy2(r, reposdir) conf.reposdir = [reposdir] dnfbase.read_all_repos() # add the sources for i, r in enumerate(sources): if "SRPM" in r or "srpm" in r: log.info("Skipping source repo: %s", r) continue repo_name = "lorax-repo-%d" % i repo = dnf.repo.Repo(repo_name, conf) repo.baseurl = [r] if proxy: repo.proxy = proxy repo.enable() dnfbase.repos.add(repo) log.info("Added '%s': %s", repo_name, r) log.info("Fetching metadata...") try: repo.load() except dnf.exceptions.RepoError as e: log.error("Error fetching metadata for %s: %s", repo_name, e) return None # add the mirrorlists for i, r in enumerate(mirrorlists): if "SRPM" in r or "srpm" in r: log.info("Skipping source repo: %s", r) continue repo_name = "lorax-mirrorlist-%d" % i repo = dnf.repo.Repo(repo_name, conf) repo.mirrorlist = r if proxy: repo.proxy = proxy repo.enable() dnfbase.repos.add(repo) log.info("Added '%s': %s", repo_name, r) log.info("Fetching metadata...") try: repo.load() except dnf.exceptions.RepoError as e: log.error("Error fetching metadata for %s: %s", repo_name, e) return None # Enable repos listed on the cmdline for r in enablerepos: repolist = dnfbase.repos.get_matching(r) if not repolist: log.warning("%s is an unknown repo, not enabling it", r) else: repolist.enable() log.info("Enabled repo %s", r) # Disable repos listed on the cmdline for r in disablerepos: repolist = dnfbase.repos.get_matching(r) if not repolist: log.warning("%s is an unknown repo, not disabling it", r) else: repolist.disable() log.info("Disabled repo %s", r) dnfbase.fill_sack(load_system_repo=False) dnfbase.read_comps() return dnfbase