230 lines
11 KiB
Python
230 lines
11 KiB
Python
import datetime
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import os
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import re
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import sys
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##
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from lxml import etree
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try:
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# Note that currently, even on CentOS/RHEL 7, the yum module is only available for Python 2...
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# because reasons or something?
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# This may be re-done to allow for a third-party library in the case of python 3 invocation.
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import yum
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has_yum = True
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except ImportError:
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# This will get *ugly*. You have been warned. It also uses more system resources and it's INCREDIBLY slow.
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# But it's safe.
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# Requires yum-utils to be installed.
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# It assumes a python 3 environment for the exact above reason.
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import subprocess
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has_yum = False
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# See <optools>:/storage/backups/borg/tools/restore_yum_pkgs.py to use the XML file this generates.
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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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class Backup(object):
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def __init__(self, explicit_only = True,
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include_deps = False,
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output = '~/.cache/backup/misc/installed_pkgs.xml'):
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self.explicit_only = explicit_only
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self.include_deps = include_deps
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self.reasons = []
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if self.explicit_only:
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self.reasons.append('user')
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if self.include_deps:
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self.reasons.append('dep')
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self.output = os.path.abspath(os.path.expanduser(output))
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if has_yum:
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self.yb = yum.YumBase()
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# Make it run silently.
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self.yb.preconf.debuglevel = 0
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self.yb.preconf.errorlevel = 0
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self.pkg_meta = []
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# TODO: XSD?
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self.pkgs = etree.Element('packages')
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self.pkgs.attrib['distro'] = distname
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self.pkgs.attrib['version'] = '.'.join([str(i) for i in distver])
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self.pkglist = b''
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self.getPkgList()
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self.buildPkgInfo()
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self.write()
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def getPkgList(self):
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if has_yum:
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if not self.explicit_only:
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self.pkg_meta = self.yb.rpmdb.returnPackages()
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else:
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for pkg in self.yb.rpmdb.returnPackages():
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reason = pkg.yumdb_info.get('reason')
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if reason and reason.lower() in self.reasons:
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self.pkg_meta.append(pkg)
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else:
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pass # We do this in buildPkgInfo().
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return()
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def buildPkgInfo(self):
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if not has_yum:
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def repoQuery(nevra, fmtstr):
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cmd = ['/usr/bin/repoquery',
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'--installed',
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'--queryformat', fmtstr,
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nevra]
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cmd_out = subprocess.run(cmd, stdout = subprocess.PIPE).stdout.decode('utf-8')
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return(cmd_out)
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_reason = '*'
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if self.reasons:
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if 'dep' not in self.reasons:
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_reason = 'user'
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cmd = ['/usr/sbin/yumdb',
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'search',
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'reason',
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_reason]
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rawpkgs = subprocess.run(cmd, stdout = subprocess.PIPE).stdout.decode('utf-8')
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reason_re = re.compile('^(\s+reason\s+=\s+.*|\s*)$')
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pkgs = []
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for line in rawpkgs.splitlines():
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if not reason_re.search(line):
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pkgs.append(line.strip())
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for pkg_nevra in pkgs:
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reponame = repo_re.sub('', repoQuery(pkg_nevra, '%{ui_from_repo}')).strip()
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repo = self.pkgs.xpath('repo[@name="{0}"]'.format(reponame))
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if repo:
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repo = repo[0]
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else:
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# This is pretty error-prone. Fix/cleanup your systems.
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repo = etree.Element('repo')
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repo.attrib['name'] = reponame
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rawrepo = subprocess.run(['/usr/bin/yum',
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'-v',
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'repolist',
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reponame],
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stdout = subprocess.PIPE).stdout.decode('utf-8')
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urls = []
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mirror = re.search('^Repo-mirrors\s*:', rawrepo, re.M)
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repostatus = re.search('^Repo-status\s*:', rawrepo, re.M)
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repourl = re.search('^Repo-baseurl\s*:', rawrepo, re.M)
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repodesc = re.search('^Repo-name\s*:', rawrepo, re.M)
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if mirror:
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urls.append(mirror.group(0).split(':', 1)[1].strip())
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if repourl:
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urls.append(repourl.group(0).split(':', 1)[1].strip())
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repo.attrib['urls'] = '>'.join(urls) # https://stackoverflow.com/a/13500078
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if repostatus:
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repostatus = repostatus.group(0).split(':', 1)[1].strip().lower()
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repo.attrib['enabled'] = ('true' if repostatus == 'enabled' else 'false')
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else:
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repo.attrib['enabled'] = 'false'
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if repodesc:
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repo.attrib['desc'] = repodesc.group(0).split(':', 1)[1].strip()
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else:
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repo.attrib['desc'] = '(metadata missing)'
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self.pkgs.append(repo)
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pkgelem = etree.Element('package')
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pkginfo = {'NEVRA': pkg_nevra,
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'desc': repoQuery(pkg_nevra, '%{summary}').strip()}
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# These are all values with no whitespace so we can easily combine into one call and then split them.
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(pkginfo['name'],
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pkginfo['release'],
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pkginfo['arch'],
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pkginfo['version'],
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pkginfo['built'],
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pkginfo['installed'],
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pkginfo['sizerpm'],
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pkginfo['sizedisk']) = re.split('\t',
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repoQuery(pkg_nevra,
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('%{name}\t'
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'%{release}\t'
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'%{arch}\t'
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'%{ver}\t' # version
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'%{buildtime}\t' # built
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'%{installtime}\t' # installed
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'%{packagesize}\t' # sizerpm
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'%{installedsize}') # sizedisk
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))
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for k in ('built', 'installed', 'sizerpm', 'sizedisk'):
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pkginfo[k] = int(pkginfo[k])
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for k in ('built', 'installed'):
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pkginfo[k] = datetime.datetime.fromtimestamp(pkginfo[k])
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for k, v in pkginfo.items():
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if pyver >= py3:
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pkgelem.attrib[k] = str(v)
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else:
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if isinstance(v, (int, long, datetime.datetime)):
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pkgelem.attrib[k] = str(v).encode('utf-8')
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elif isinstance(v, str):
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pkgelem.attrib[k] = v.decode('utf-8')
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else:
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pkgelem.attrib[k] = v.encode('utf-8')
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repo.append(pkgelem)
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else:
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for pkg in self.pkg_meta:
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reponame = repo_re.sub('', pkg.ui_from_repo)
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repo = self.pkgs.xpath('repo[@name="{0}"]'.format(reponame))
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if repo:
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repo = repo[0]
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else:
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repo = etree.Element('repo')
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repo.attrib['name'] = reponame
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try:
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repoinfo = self.yb.repos.repos[reponame]
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repo.attrib['urls'] = '>'.join(repoinfo.urls) # https://stackoverflow.com/a/13500078
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repo.attrib['enabled'] = ('true' if repoinfo in self.yb.repos.listEnabled() else 'false')
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repo.attrib['desc'] = repoinfo.name
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except KeyError: # Repo is missing
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repo.attrib['desc'] = '(metadata missing)'
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self.pkgs.append(repo)
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pkgelem = etree.Element('package')
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pkginfo = {'name': pkg.name,
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'desc': pkg.summary,
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'version': pkg.ver,
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'release': pkg.release,
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'arch': pkg.arch,
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'built': datetime.datetime.fromtimestamp(pkg.buildtime),
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'installed': datetime.datetime.fromtimestamp(pkg.installtime),
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'sizerpm': pkg.packagesize,
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'sizedisk': pkg.installedsize,
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'NEVRA': pkg.nevra}
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for k, v in pkginfo.items():
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if pyver >= py3:
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pkgelem.attrib[k] = str(v)
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else:
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if isinstance(v, (int, long, datetime.datetime)):
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pkgelem.attrib[k] = str(v).encode('utf-8')
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elif isinstance(v, str):
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pkgelem.attrib[k] = v.decode('utf-8')
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else:
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pkgelem.attrib[k] = v.encode('utf-8')
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repo.append(pkgelem)
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self.pkglist = etree.tostring(self.pkgs,
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pretty_print = True,
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xml_declaration = True,
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encoding = 'UTF-8')
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return()
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def write(self):
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outdir = os.path.dirname(self.output)
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if pyver >= py3:
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os.makedirs(outdir, exist_ok = True)
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os.chmod(outdir, mode = 0o0700)
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else:
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if not os.path.isdir(outdir):
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os.makedirs(outdir)
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os.chmod(outdir, 0o0700)
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with open(self.output, 'wb') as f:
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f.write(self.pkglist)
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return()
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