194 lines
8.8 KiB
Python
194 lines
8.8 KiB
Python
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#!/usr/bin/env python
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import argparse # yum install python-argparse on CentOS/RHEL 6.x
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import os
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import re
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import subprocess
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import sys
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import warnings
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##
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# The yum API is *suuuper* cantankerous and kind of broken, even.
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# Patches welcome, but for now we just use subprocess.
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import yum
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from lxml import etree # yum install python-lxml
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# Detect RH version.
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ver_re =re.compile('^(centos.*|red\s?hat.*) ([0-9\.]+) .*$', re.IGNORECASE)
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# distro module isn't stdlib, and platform.linux_distribution() (AND platform.distro()) are both deprecated in 3.7.
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# So we get hacky.
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with open('/etc/redhat-release', 'r') as f:
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rawver = f.read()
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distver = [int(i) for i in ver_re.sub('\g<2>', rawver.strip()).split('.')]
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distname = re.sub('(Linux )?release', '', ver_re.sub('\g<1>', rawver.strip()), re.IGNORECASE).strip()
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# Regex pattern to get the repo name. We compile it just to speed up the execution.
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repo_re = re.compile('^@')
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# Python version
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pyver = sys.hexversion
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py3 = 0x30000f0 # TODO: check the version incompats
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if pyver < py3:
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import copy
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class Reinstaller(object):
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def __init__(self, pkglist_path, latest = True):
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self.latest = latest
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pkglist_file = os.path.abspath(os.path.expanduser(pkglist_path))
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with open(pkglist_file, 'rb') as f:
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self.pkgs = etree.fromstring(f.read())
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if not self.latest:
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# Make sure the versions match, otherwise Bad Things(TM) can occur.
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if not all(((distname == self.pkgs.attrib['distro']),
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('.'.join([str(i) for i in distver]) == self.pkgs.attrib['version']))):
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err = ('This package set was created on {0} {1}. '
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'The current running OS is {2} {3} and you have set latest = False/None. '
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'THIS IS A VERY BAD IDEA.').format(self.pkgs.attrib['distro'],
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self.pkgs.attrib['version'],
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distname,
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'.'.join([str(i) for i in distver]))
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raise RuntimeError(err)
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# Make it run silently.
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self.yb = yum.YumBase()
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self.yb.preconf.quiet = 1
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self.yb.preconf.debuglevel = 0
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self.yb.preconf.errorlevel = 0
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self.yb.preconf.assumeyes = 1
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self.yb.preconf.rpmverbosity = 'error'
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def iterPkgs(self):
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for repo in self.pkgs.findall('repo'):
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# Base install packages ("anaconda") don't play nicely with this. They should be expected to
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# already be installed anyways, and self.latest is irrelevant - downgrading these can cause
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# *major* issues.
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# And "installed" repo are packages installed manually from RPM.
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if self.latest:
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if repo.attrib['name'].lower() in ('anaconda', 'installed'):
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continue
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reponm = repo.attrib['desc']
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# This is only needed for the subprocess workaround.
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cmd = ['yum', '-q', '-y',
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# '--disablerepo=*',
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'--enablerepo={0}'.format(repo.attrib['name'])]
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pkgs = {'new': [],
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'upgrade': [],
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'downgrade': []}
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for pkg in repo.findall('package'):
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pkg_found = False
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is_installed = False
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if self.latest:
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pkgnm = pkg.attrib['name']
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else:
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pkgnm = pkg.attrib['NEVRA']
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pkglist = self.yb.doPackageLists(patterns = [pkgnm], showdups = True)
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if pkglist.updates:
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for pkgobj in reversed(pkglist.updates):
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if pkgobj.repo.name == reponm:
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# Haven't gotten this working properly. Patches welcome.
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# self.yb.install(po = pkgobj)
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# self.yb.resolveDeps()
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# self.yb.buildTransaction()
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# self.yb.processTransaction()
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if self.latest:
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pkgs['upgrade'].append(pkgobj.name)
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else:
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if distver[0] >= 7:
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pkgs['upgrade'].append(pkgobj.nevra)
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else:
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pkgs['upgrade'].append(pkgobj._ui_nevra())
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pkg_found = True
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is_installed = False
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break
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if pkglist.installed and not pkg_found:
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for pkgobj in reversed(pkglist.installed):
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if pkgobj.repo.name == reponm:
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if distver[0] >= 7:
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nevra = pkgobj.nevra
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else:
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nevra = pkgobj._ui_nevra()
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warn = ('{0} from {1} is already installed; skipping').format(nevra,
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repo.attrib['name'])
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warnings.warn(warn)
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pkg_found = True
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is_installed = True
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if not all((is_installed, pkg_found)):
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if pkglist.available:
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for pkgobj in reversed(pkglist.available):
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if pkgobj.repo.name == reponm:
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# Haven't gotten this working properly. Patches welcome.
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# self.yb.install(po = pkgobj)
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# self.yb.resolveDeps()
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# self.yb.buildTransaction()
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# self.yb.processTransaction()
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if self.latest:
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pkgs['new'].append(pkgobj.name)
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else:
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if distver[0] >= 7:
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pkgs['new'].append(pkgobj.nevra)
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else:
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pkgs['new'].append(pkgobj._ui_nevra())
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is_installed = False
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pkg_found = True
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break
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if not self.latest:
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if pkglist.old_available:
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for pkgobj in reversed(pkglist.old_available):
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if pkgobj.repo.name == reponm:
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# Haven't gotten this working properly. Patches welcome.
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# self.yb.install(po = pkgobj)
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# self.yb.resolveDeps()
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# self.yb.buildTransaction()
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# self.yb.processTransaction()
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if distver[0] >= 7:
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pkgs['downgrade'].append(pkgobj.nevra)
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else:
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pkgs['downgrade'].append(pkgobj._ui_nevra())
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pkg_found = True
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break
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# # This... seems to always fail. Patches welcome.
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# # self.yb.processTransaction()
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for k in pkgs:
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if not pkgs[k]:
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continue
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if pyver < py3:
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_cmd = copy.deepcopy(cmd)
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else:
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_cmd = cmd.copy()
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if k == 'downgrade':
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_cmd.append('downgrade')
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else:
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if self.latest:
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_cmd.append('install')
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else:
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if distver[0] >= 7:
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_cmd.append('install-nevra')
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else:
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_cmd.append('install')
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_cmd.extend(pkgs[k])
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if pyver >= py3:
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subprocess.run(_cmd)
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else:
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subprocess.call(_cmd)
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return()
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def parseArgs():
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args = argparse.ArgumentParser(description = ('Reinstall packages from a generated XML package list'))
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args.add_argument('-V', '--version',
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dest = 'latest',
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action = 'store_false',
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help = ('If specified, (try to) install the same version as specified in the package list.'))
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args.add_argument('pkglist_path',
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metavar = 'PKGLIST',
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help = ('The path to the generated packages XML file.'))
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return(args)
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def main():
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args = parseArgs().parse_args()
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dictargs = vars(args)
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r = Reinstaller(**dictargs)
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r.iterPkgs()
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return()
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if __name__ == '__main__':
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main()
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