# 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="29",
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']
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