#!/usr/bin/python -tt
#
# Copyright (c) 2010, 2011 Intel, 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; version 2 of the License
#
# 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, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.

import os
import shutil
import urlparse
import rpm
import glob

import zypp
if not hasattr(zypp, 'PoolQuery') or \
   not hasattr(zypp.RepoManager, 'loadSolvFile'):
    raise ImportError("python-zypp in host system cannot support PoolQuery or "
                      "loadSolvFile interface, please update it to enhanced "
                      "version which can be found in download.tizen.org/tools")

from mic import msger
from mic.kickstart import ksparser
from mic.utils import misc, rpmmisc, runner, fs_related
from mic.utils.grabber import myurlgrab, TextProgress
from mic.utils.proxy import get_proxy_for
from mic.utils.errors import CreatorError, RepoError, RpmError
from mic.conf import configmgr

class RepositoryStub:
    def __init__(self):
        self.name = None
        self.baseurl = []
        self.mirrorlist = None
        self.proxy = None
        self.proxy_username = None
        self.proxy_password = None
        self.nocache = False

        self.enabled = True
        self.autorefresh = True
        self.keeppackages = True
        self.priority = None

from mic.pluginbase import BackendPlugin
class Zypp(BackendPlugin):
    name = 'zypp'

    def __init__(self, target_arch, instroot, cachedir, strict_mode = False):
        self.cachedir = cachedir
        self.instroot  = instroot
        self.target_arch = target_arch
        self.strict_mode = strict_mode

        self.__pkgs_license = {}
        self.__pkgs_content = {}
        self.__pkgs_vcsinfo = {}
        self.repos = []
        self.to_deselect = []
        self.localpkgs = {}
        self.repo_manager = None
        self.repo_manager_options = None
        self.Z = None
        self.ts = None
        self.ts_pre = None
        self.incpkgs = {}
        self.excpkgs = {}
        self.pre_pkgs = []
        self.check_pkgs = []
        self.probFilterFlags = [ rpm.RPMPROB_FILTER_OLDPACKAGE,
                                 rpm.RPMPROB_FILTER_REPLACEPKG ]

        self.has_prov_query = True
        self.install_debuginfo = False
        # this can't be changed, it is used by zypp
        self.tmp_file_path = '/var/tmp'

    def doFileLogSetup(self, uid, logfile):
        # don't do the file log for the livecd as it can lead to open fds
        # being left and an inability to clean up after ourself
        pass

    def closeRpmDB(self):
        pass

    def close(self):
        if self.ts:
            self.ts.closeDB()
            self.ts = None

        if self.ts_pre:
            self.ts_pre.closeDB()
            self.ts = None

        self.closeRpmDB()

    def __del__(self):
        self.close()

    def _cleanupRpmdbLocks(self, installroot):
        # cleans up temporary files left by bdb so that differing
        # versions of rpm don't cause problems
        import glob
        for f in glob.glob(installroot + "/var/lib/rpm/__db*"):
            os.unlink(f)

    def _cleanupZyppJunk(self, installroot):
        try:
            shutil.rmtree(os.path.join(installroot, '.zypp'))
        except:
            pass

    def setup(self):
        self._cleanupRpmdbLocks(self.instroot)
        # '/var/tmp' is used by zypp to build cache, so make sure
        # if it exists
        if not os.path.exists(self.tmp_file_path ):
            os.makedirs(self.tmp_file_path)

    def whatObsolete(self, pkg):
        query = zypp.PoolQuery()
        query.addKind(zypp.ResKind.package)
        query.addDependency(zypp.SolvAttr.obsoletes, pkg.name(), pkg.edition())
        query.setMatchExact()
        for pi in query.queryResults(self.Z.pool()):
            return pi
        return None

    def _zyppQueryPackage(self, pkg):
        query = zypp.PoolQuery()
        query.addKind(zypp.ResKind.package)
        query.addAttribute(zypp.SolvAttr.name, pkg)
        query.setMatchExact()
        for pi in query.queryResults(self.Z.pool()):
            return pi
        return None

    def _splitPkgString(self, pkg):
        sp = pkg.rsplit(".", 1)
        name = sp[0]
        arch = None
        if len(sp) == 2:
            arch = sp[1]
            sysarch = zypp.Arch(self.target_arch)
            if not zypp.Arch(arch).compatible_with (sysarch):
                arch = None
                name = ".".join(sp)
        return name, arch

    def selectPackage(self, pkg):
        """Select a given package or package pattern, can be specified
        with name.arch or name* or *name
        """

        if not self.Z:
            self.__initialize_zypp()

        def markPoolItem(obs, pi):
            if obs == None:
                pi.status().setToBeInstalled (zypp.ResStatus.USER)
            else:
                obs.status().setToBeInstalled (zypp.ResStatus.USER)

        def cmpEVR(p1, p2):
            # compare criterion: arch compatibility first, then repo
            # priority, and version last
            a1 = p1.arch()
            a2 = p2.arch()
            if str(a1) != str(a2):
                if a1.compatible_with(a2):
                    return -1
                else:
                    return 1
            # Priority of a repository is an integer value between 0 (the
            # highest priority) and 99 (the lowest priority)
            pr1 = int(p1.repoInfo().priority())
            pr2 = int(p2.repoInfo().priority())
            if pr1 > pr2:
                return -1
            elif pr1 < pr2:
                return 1

            ed1 = p1.edition()
            ed2 = p2.edition()
            (e1, v1, r1) = map(str, [ed1.epoch(), ed1.version(), ed1.release()])
            (e2, v2, r2) = map(str, [ed2.epoch(), ed2.version(), ed2.release()])
            return rpm.labelCompare((e1, v1, r1), (e2, v2, r2))

        found = False
        startx = pkg.startswith("*")
        endx = pkg.endswith("*")
        ispattern = startx or endx
        name, arch = self._splitPkgString(pkg)

        q = zypp.PoolQuery()
        q.addKind(zypp.ResKind.package)

        if ispattern:
            if startx and not endx:
                pattern = '%s$' % (pkg[1:])
            if endx and not startx:
                pattern = '^%s' % (pkg[0:-1])
            if endx and startx:
                pattern = '%s' % (pkg[1:-1])
            q.setMatchRegex()
            q.addAttribute(zypp.SolvAttr.name, pattern)

        elif arch:
            q.setMatchExact()
            q.addAttribute(zypp.SolvAttr.name, name)

        else:
            q.setMatchExact()
            q.addAttribute(zypp.SolvAttr.name, pkg)

        for pitem in sorted(
                        q.queryResults(self.Z.pool()),
                        cmp=lambda x,y: cmpEVR(zypp.asKindPackage(x), zypp.asKindPackage(y)),
                        reverse=True):
            item = zypp.asKindPackage(pitem)
            if item.name() in self.excpkgs.keys() and \
               self.excpkgs[item.name()] == item.repoInfo().name():
                continue
            if item.name() in self.incpkgs.keys() and \
               self.incpkgs[item.name()] != item.repoInfo().name():
                continue

            found = True
            obspkg = self.whatObsolete(item)
            if arch:
                if arch == str(item.arch()):
                    pitem.status().setToBeInstalled (zypp.ResStatus.USER)
            else:
                markPoolItem(obspkg, pitem)
            if not ispattern:
                break

        # Can't match using package name, then search from packge
        # provides infomation
        if found == False and not ispattern:
            q.addAttribute(zypp.SolvAttr.provides, pkg)
            q.addAttribute(zypp.SolvAttr.name,'')

            for pitem in sorted(
                            q.queryResults(self.Z.pool()),
                            cmp=lambda x,y: cmpEVR(zypp.asKindPackage(x), zypp.asKindPackage(y)),
                            reverse=True):
                item = zypp.asKindPackage(pitem)
                if item.name() in self.excpkgs.keys() and \
                   self.excpkgs[item.name()] == item.repoInfo().name():
                    continue
                if item.name() in self.incpkgs.keys() and \
                   self.incpkgs[item.name()] != item.repoInfo().name():
                    continue

                found = True
                obspkg = self.whatObsolete(item)
                markPoolItem(obspkg, pitem)
                break

        if found:
            return None
        else:
            raise CreatorError("Unable to find package: %s" % (pkg,))

    def inDeselectPackages(self, pitem):
        """check if specified pacakges are in the list of inDeselectPackages
        """
        item = zypp.asKindPackage(pitem)
        name = item.name()
        for pkg in self.to_deselect:
            startx = pkg.startswith("*")
            endx = pkg.endswith("*")
            ispattern = startx or endx
            pkgname, pkgarch = self._splitPkgString(pkg)
            if not ispattern:
                if pkgarch:
                    if name == pkgname and str(item.arch()) == pkgarch:
                        return True
                else:
                    if name == pkgname:
                        return True
            else:
                if startx and name.endswith(pkg[1:]):
                    return True
                if endx and name.startswith(pkg[:-1]):
                    return True

        return False

    def deselectPackage(self, pkg):
        """collect packages should not be installed"""
        self.to_deselect.append(pkg)

    def selectGroup(self, grp, include = ksparser.GROUP_DEFAULT):
        def compareGroup(pitem):
            item = zypp.asKindPattern(pitem)
            return item.repoInfo().priority()
        if not self.Z:
            self.__initialize_zypp()
        found = False
        q = zypp.PoolQuery()
        q.addKind(zypp.ResKind.pattern)
        for pitem in sorted(q.queryResults(self.Z.pool()), key=compareGroup):
            item = zypp.asKindPattern(pitem)
            summary = "%s" % item.summary()
            name = "%s" % item.name()
            if name == grp or summary == grp:
                found = True
                pitem.status().setToBeInstalled (zypp.ResStatus.USER)
                break

        if found:
            if include == ksparser.GROUP_REQUIRED:
                map(
                    lambda p: self.deselectPackage(p),
                    grp.default_packages.keys())

            return None
        else:
            raise CreatorError("Unable to find pattern: %s" % (grp,))

    def addRepository(self, name,
                            url = None,
                            mirrorlist = None,
                            proxy = None,
                            proxy_username = None,
                            proxy_password = None,
                            inc = None,
                            exc = None,
                            ssl_verify = True,
                            nocache = False,
                            cost=None,
                            priority=None):
        # TODO: Handle cost attribute for repos

        if not self.repo_manager:
            self.__initialize_repo_manager()

        if not proxy and url:
            proxy = get_proxy_for(url)

        repo = RepositoryStub()
        repo.name = name
        repo.id = name
        repo.proxy = proxy
        repo.proxy_username = proxy_username
        repo.proxy_password = proxy_password
        repo.ssl_verify = ssl_verify
        repo.nocache = nocache
        repo.baseurl.append(url)
        if inc:
            for pkg in inc:
                self.incpkgs[pkg] = name
        if exc:
            for pkg in exc:
                self.excpkgs[pkg] = name

        if mirrorlist:
            repo.mirrorlist = mirrorlist

        # Enable gpg check for verifying corrupt packages
        repo.gpgcheck = 1
        if priority is not None:
            # priority 0 has issue in RepoInfo.setPriority
            repo.priority = priority + 1

        try:
            repo_info = zypp.RepoInfo()
            repo_info.setAlias(repo.name)
            repo_info.setName(repo.name)
            repo_info.setEnabled(repo.enabled)
            repo_info.setAutorefresh(repo.autorefresh)
            repo_info.setKeepPackages(repo.keeppackages)
            baseurl = zypp.Url(repo.baseurl[0].full)
            if not ssl_verify:
                baseurl.setQueryParam("ssl_verify", "no")
            if proxy:
                host = urlparse.urlparse(proxy)[1]
                # scheme, host, path, parm, query, frag = urlparse.urlparse(proxy)

                proxyinfo = host.rsplit(":", 1)
                host = proxyinfo[0]

                port = "80"
                if len(proxyinfo) > 1:
                    port = proxyinfo[1]

                if proxy.startswith("socks") and len(proxy.rsplit(':', 1)) == 2:
                    host = proxy.rsplit(':', 1)[0]
                    port = proxy.rsplit(':', 1)[1]

                # parse user/pass from proxy host
                proxyinfo = host.rsplit("@", 1)
                if len(proxyinfo) == 2:
                    host = proxyinfo[1]
                    # Known Issue: If password contains ":", which should be
                    # quoted, for example, use '123%3Aabc' instead of 123:abc
                    userpassinfo = proxyinfo[0].rsplit(":", 1)
                    if len(userpassinfo) == 2:
                        proxy_username = userpassinfo[0]
                        proxy_password = userpassinfo[1]
                    elif len(userpassinfo) == 1:
                        proxy_username = userpassinfo[0]

                baseurl.setQueryParam ("proxy", host)
                baseurl.setQueryParam ("proxyport", port)
                if proxy_username:
                    baseurl.setQueryParam ("proxyuser", proxy_username)
                if proxy_password:
                    baseurl.setQueryParam ("proxypass", proxy_password)
            else:
                baseurl.setQueryParam ("proxy", "_none_")

            self.repos.append(repo)

            repo_info.addBaseUrl(baseurl)

            if repo.priority is not None:
                repo_info.setPriority(repo.priority)

            # this hack is used to change zypp credential file location
            # the default one is $HOME/.zypp, which cause conflicts when
            # installing some basic packages, and the location doesn't
            # have any interface actually, so use a tricky way anyway
            homedir = None
            if 'HOME' in os.environ:
                homedir = os.environ['HOME']
                os.environ['HOME'] = '/'
            else:
                os.environ['HOME'] = '/'

            self.repo_manager.addRepository(repo_info)

            # save back the $HOME env
            if homedir:
                os.environ['HOME'] = homedir
            else:
                del os.environ['HOME']

            self.__build_repo_cache(name)

        except RuntimeError, e:
            raise CreatorError(str(e))

        msger.verbose('repo: %s was added' % name)
        return repo

    def installHasFile(self, file):
        return False

    def preInstall(self, pkg):
        self.pre_pkgs.append(pkg)

    def checkPackage(self, pkg):
        self.check_pkgs.append(pkg)

    def _get_local_packages(self):
        """Return a list of rpm path to be local installed.
        This is the hook where subclasses may specify a set of rpms which
        it requires to be installed locally.
        This returns an empty list by default.
        Note, subclasses should usually chain up to the base class
        implementation of this hook.
        """
        cropts = configmgr.create
        if cropts['local_pkgs_path']:
            if os.path.isdir(cropts['local_pkgs_path']):
                return glob.glob(
                        os.path.join(cropts['local_pkgs_path'], '*.rpm'))
            elif os.path.splitext(cropts['local_pkgs_path'])[-1] == '.rpm':
                return [cropts['local_pkgs_path']]
        return []
    def __localinst_packages(self):
        for rpm_path in self._get_local_packages():
            self.installLocal(rpm_path)
    def runInstall(self, checksize = 0):
        os.environ["HOME"] = "/"
        os.environ["LD_PRELOAD"] = ""
        self.buildTransaction()
        self.__localinst_packages()

        todo = zypp.GetResolvablesToInsDel(self.Z.pool())
        installed_pkgs = todo._toInstall
        dlpkgs = []

        for pitem in installed_pkgs:
            if not zypp.isKindPattern(pitem) and \
              not self.inDeselectPackages(pitem):
                item = zypp.asKindPackage(pitem)
                dlpkgs.append(item)

                if item.name() in self.check_pkgs:
                    self.check_pkgs.remove(item.name())

                if not self.install_debuginfo or str(item.arch()) == "noarch":
                    continue

                dipkg = self._zyppQueryPackage("%s-debuginfo" % item.name())
                if dipkg:
                    ditem = zypp.asKindPackage(dipkg)
                    dlpkgs.append(ditem)
                else:
                    msger.warning("No debuginfo rpm found for: %s" \
                                  % item.name())

        if self.check_pkgs:
            raise CreatorError('Packages absent in image: %s' % ','.join(self.check_pkgs))

        # record all pkg and the content
        localpkgs = self.localpkgs.keys()
        for pkg in dlpkgs:
            license = ''
            if pkg.name() in localpkgs:
                hdr = rpmmisc.readRpmHeader(self.ts, self.localpkgs[pkg.name()])
                pkg_long_name = misc.RPM_FMT % {
                                    'name': hdr['name'],
                                    'arch': hdr['arch'],
                                    'version': hdr['version'],
                                    'release': hdr['release']
                                }
                license = hdr['license']

            else:
                pkg_long_name = misc.RPM_FMT % {
                                    'name': pkg.name(),
                                    'arch': pkg.arch(),
                                    'version': pkg.edition().version(),
                                    'release': pkg.edition().release()
                                }

                license = pkg.license()

            if license in self.__pkgs_license.keys():
                self.__pkgs_license[license].append(pkg_long_name)
            else:
                self.__pkgs_license[license] = [pkg_long_name]

        total_count = len(dlpkgs)
        cached_count = 0
        download_total_size = sum(map(lambda x: int(x.downloadSize()), dlpkgs))
        localpkgs = self.localpkgs.keys()

        msger.info("Checking packages cached ...")
        for po in dlpkgs:
            # Check if it is cached locally
            if po.name() in localpkgs:
                cached_count += 1
            else:
                local = self.getLocalPkgPath(po)
                name = str(po.repoInfo().name())
                try:
                    repo = filter(lambda r: r.name == name, self.repos)[0]
                except IndexError:
                    repo = None
                nocache = repo.nocache if repo else False

                if os.path.exists(local):
                    if nocache or self.checkPkg(local) !=0:
                        os.unlink(local)
                    else:
                        download_total_size -= int(po.downloadSize())
                        cached_count += 1
        cache_avail_size = misc.get_filesystem_avail(self.cachedir)
        if cache_avail_size < download_total_size:
            raise CreatorError("No enough space used for downloading.")

        # record the total size of installed pkgs
        install_total_size = sum(map(lambda x: int(x.installSize()), dlpkgs))
        # check needed size before actually download and install

        # FIXME: for multiple partitions for loop type, check fails
        #        skip the check temporarily
        #if checksize and install_total_size > checksize:
        #    raise CreatorError("No enough space used for installing, "
        #                       "please resize partition size in ks file")

        download_count =  total_count - cached_count
        msger.info("Packages: %d Total, %d Cached, %d Missed" \
                   % (total_count, cached_count, download_count))

        try:
            if download_count > 0:
                msger.info("Downloading packages ...")
            self.downloadPkgs(dlpkgs, download_count)
        except CreatorError, e:
            raise CreatorError("Package download failed: %s" %(e,))

        try:
            self.installPkgs(dlpkgs)
        except (RepoError, RpmError):
            raise
        except Exception, e:
            raise CreatorError("Package installation failed: %s" % (e,))

    def getVcsInfo(self):
        if self.__pkgs_vcsinfo:
            return

        if not self.ts:
            self.__initialize_transaction()

        mi = self.ts.dbMatch()
        for hdr in mi:
            lname = misc.RPM_FMT % {
                        'name': hdr['name'],
                        'arch': hdr['arch'],
                        'version': hdr['version'],
                        'release': hdr['release']
                    }
            try:
                self.__pkgs_vcsinfo[lname] = hdr['VCS']
            except ValueError:
                # if rpm not support VCS, set to None
                self.__pkgs_vcsinfo[lname] = None

        return self.__pkgs_vcsinfo

    def getAllContent(self):
        if self.__pkgs_content:
            return self.__pkgs_content

        if not self.ts:
            self.__initialize_transaction()

        mi = self.ts.dbMatch()
        for hdr in mi:
            lname = misc.RPM_FMT % {
                        'name': hdr['name'],
                        'arch': hdr['arch'],
                        'version': hdr['version'],
                        'release': hdr['release']
                    }
            self.__pkgs_content[lname] = hdr['FILENAMES']

        return self.__pkgs_content

    def getPkgsLicense(self):
        return self.__pkgs_license

    def getFilelist(self, pkgname):
        if not pkgname:
            return None

        if not self.ts:
            self.__initialize_transaction()

        mi = self.ts.dbMatch('name', pkgname)
        for header in mi:
            return header['FILENAMES']

    def __initialize_repo_manager(self):
        if self.repo_manager:
            return

        # Clean up repo metadata
        shutil.rmtree(self.cachedir + "/etc", ignore_errors = True)
        shutil.rmtree(self.cachedir + "/solv", ignore_errors = True)
        shutil.rmtree(self.cachedir + "/raw", ignore_errors = True)

        zypp.KeyRing.setDefaultAccept( zypp.KeyRing.ACCEPT_UNSIGNED_FILE
                                     | zypp.KeyRing.ACCEPT_VERIFICATION_FAILED
                                     | zypp.KeyRing.ACCEPT_UNKNOWNKEY
                                     | zypp.KeyRing.TRUST_KEY_TEMPORARILY
                                     )

        self.repo_manager_options = \
                zypp.RepoManagerOptions(zypp.Pathname(self.instroot))

        self.repo_manager_options.knownReposPath = \
                zypp.Pathname(self.cachedir + "/etc/zypp/repos.d")

        self.repo_manager_options.repoCachePath = \
                zypp.Pathname(self.cachedir)

        self.repo_manager_options.repoRawCachePath = \
                zypp.Pathname(self.cachedir + "/raw")

        self.repo_manager_options.repoSolvCachePath = \
                zypp.Pathname(self.cachedir + "/solv")

        self.repo_manager_options.repoPackagesCachePath = \
                zypp.Pathname(self.cachedir + "/packages")

        self.repo_manager = zypp.RepoManager(self.repo_manager_options)

    def __build_repo_cache(self, name):
        repo = self.repo_manager.getRepositoryInfo(name)
        if self.repo_manager.isCached(repo) or not repo.enabled():
            return

        msger.info('Refreshing repository: %s ...' % name)
        self.repo_manager.buildCache(repo, zypp.RepoManager.BuildIfNeeded)

    def __initialize_zypp(self):
        if self.Z:
            return

        zconfig = zypp.ZConfig_instance()

        # Set system architecture
        if self.target_arch:
            zconfig.setSystemArchitecture(zypp.Arch(self.target_arch))

        msger.info("zypp architecture is <%s>" % zconfig.systemArchitecture())

        # repoPackagesCachePath is corrected by this
        self.repo_manager = zypp.RepoManager(self.repo_manager_options)
        repos = self.repo_manager.knownRepositories()
        for repo in repos:
            if not repo.enabled():
                continue
            self.repo_manager.loadFromCache(repo)

        self.Z = zypp.ZYppFactory_instance().getZYpp()
        self.Z.initializeTarget(zypp.Pathname(self.instroot))
        self.Z.target().load()

    def buildTransaction(self):
        if not self.Z.resolver().resolvePool():
            probs = self.Z.resolver().problems()

            for problem in probs:
                msger.warning("repo problem: %s, %s" \
                              % (problem.description().decode("utf-8"),
                                 problem.details().decode("utf-8")))

            raise RepoError("found %d resolver problem, abort!" \
                            % len(probs))

    def getLocalPkgPath(self, po):
        repoinfo = po.repoInfo()
        cacheroot = repoinfo.packagesPath()
        location = po.location()
        rpmpath = str(location.filename())
        pkgpath = "%s/%s" % (cacheroot, os.path.basename(rpmpath))
        return pkgpath

    def installLocal(self, pkg, po=None, updateonly=False):
        if not self.ts:
            self.__initialize_transaction()

        solvfile = "%s/.solv" % (self.cachedir)

        rc, out = runner.runtool([fs_related.find_binary_path("rpms2solv"),
                                  pkg])
        if rc == 0:
            f = open(solvfile, "w+")
            f.write(out)
            f.close()

            warnmsg = self.repo_manager.loadSolvFile(solvfile,
                                                     os.path.basename(pkg))
            if warnmsg:
                msger.warning(warnmsg)

            os.unlink(solvfile)
        else:
            msger.warning('Can not get %s solv data.' % pkg)

        hdr = rpmmisc.readRpmHeader(self.ts, pkg)
        arch = zypp.Arch(hdr['arch'])
        sysarch = zypp.Arch(self.target_arch)

        if arch.compatible_with (sysarch):
            pkgname = hdr['name']
            self.localpkgs[pkgname] = pkg
            self.selectPackage(pkgname)
            msger.info("Marking %s to be installed" % (pkg))

        else:
            msger.warning("Cannot add package %s to transaction. "
                          "Not a compatible architecture: %s" \
                          % (pkg, hdr['arch']))

    def downloadPkgs(self, package_objects, count):
        localpkgs = self.localpkgs.keys()
        progress_obj = TextProgress(count)

        for po in package_objects:
            if po.name() in localpkgs:
                continue

            filename = self.getLocalPkgPath(po)
            if os.path.exists(filename):
                if self.checkPkg(filename) == 0:
                    continue

            dirn = os.path.dirname(filename)
            if not os.path.exists(dirn):
                os.makedirs(dirn)

            url = self.get_url(po)
            proxies = self.get_proxies(po)

            try:
                filename = myurlgrab(url.full, filename, proxies, progress_obj)
            except CreatorError:
                self.close()
                raise

    def preinstallPkgs(self):
        if not self.ts_pre:
            self.__initialize_transaction()

        self.ts_pre.order()
        cb = rpmmisc.RPMInstallCallback(self.ts_pre)
        cb.headmsg = "Preinstall"
        installlogfile = "%s/__catched_stderr.buf" % (self.instroot)

        # start to catch stderr output from librpm
        msger.enable_logstderr(installlogfile)

        errors = self.ts_pre.run(cb.callback, '')
        # stop catch
        msger.disable_logstderr()
        self.ts_pre.closeDB()
        self.ts_pre = None

        if errors is not None:
            if len(errors) == 0:
                msger.warning('scriptlet or other non-fatal errors occurred '
                              'during transaction.')

            else:
                for e in errors:
                    msger.warning(e[0])
                raise RepoError('Could not run transaction.')

    def installPkgs(self, package_objects):
        if not self.ts:
            self.__initialize_transaction()

        # clean rpm lock
        self._cleanupRpmdbLocks(self.instroot)
        self._cleanupZyppJunk(self.instroot)
        # Set filters
        probfilter = 0
        for flag in self.probFilterFlags:
            probfilter |= flag
        self.ts.setProbFilter(probfilter)
        self.ts_pre.setProbFilter(probfilter)

        localpkgs = self.localpkgs.keys()

        for po in package_objects:
            pkgname = po.name()
            if pkgname in localpkgs:
                rpmpath = self.localpkgs[pkgname]
            else:
                rpmpath = self.getLocalPkgPath(po)

            if not os.path.exists(rpmpath):
                # Maybe it is a local repo
                rpmuri = self.get_url(po)
                if rpmuri.startswith("file:/"):
                    rpmpath = rpmuri[5:]

            if not os.path.exists(rpmpath):
                raise RpmError("Error: %s doesn't exist" % rpmpath)

            h = rpmmisc.readRpmHeader(self.ts, rpmpath)

            if pkgname in self.pre_pkgs:
                msger.verbose("pre-install package added: %s" % pkgname)
                self.ts_pre.addInstall(h, rpmpath, 'u')

            self.ts.addInstall(h, rpmpath, 'u')

        unresolved_dependencies = self.ts.check()
        if not unresolved_dependencies:
            if self.pre_pkgs:
                self.preinstallPkgs()

            self.ts.order()
            cb = rpmmisc.RPMInstallCallback(self.ts)
            installlogfile = "%s/__catched_stderr.buf" % (self.instroot)

            # start to catch stderr output from librpm
            msger.enable_logstderr(installlogfile)

            errors = self.ts.run(cb.callback, '')
            # stop catch
            msger.disable_logstderr()
            self.ts.closeDB()
            self.ts = None

            if errors is not None:
                if len(errors) == 0:
                    msger.warning('scriptlet or other non-fatal errors occurred '
                                  'during transaction.')
                    if self.strict_mode:
                        raise CreatorError("mic failes to install some packages")
                else:
                    for e in errors:
                        msger.warning(e[0])
                    raise RepoError('Could not run transaction.')

        else:
            for pkg, need, needflags, sense, key in unresolved_dependencies:
                package = '-'.join(pkg)

                if needflags == rpm.RPMSENSE_LESS:
                    deppkg = ' < '.join(need)
                elif needflags == rpm.RPMSENSE_EQUAL:
                    deppkg = ' = '.join(need)
                elif needflags == rpm.RPMSENSE_GREATER:
                    deppkg = ' > '.join(need)
                else:
                    deppkg = '-'.join(need)

                if sense == rpm.RPMDEP_SENSE_REQUIRES:
                    msger.warning("[%s] Requires [%s], which is not provided" \
                                  % (package, deppkg))

                elif sense == rpm.RPMDEP_SENSE_CONFLICTS:
                    msger.warning("[%s] Conflicts with [%s]" % (package, deppkg))

            raise RepoError("Unresolved dependencies, transaction failed.")

    def __initialize_transaction(self):
        if not self.ts:
            self.ts = rpm.TransactionSet(self.instroot)
            # Set to not verify DSA signatures.
            self.ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS)

        if not self.ts_pre:
            self.ts_pre = rpm.TransactionSet(self.instroot)
            # Just unpack the files, don't run scripts
            self.ts_pre.setFlags(rpm.RPMTRANS_FLAG_ALLFILES | rpm.RPMTRANS_FLAG_NOSCRIPTS)
            # Set to not verify DSA signatures.
            self.ts_pre.setVSFlags(rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS)

    def checkPkg(self, pkg):
        ret = 1
        if not os.path.exists(pkg):
            return ret
        ret = rpmmisc.checkRpmIntegrity('rpm', pkg)
        if ret != 0:
            msger.warning("package %s is damaged: %s" \
                          % (os.path.basename(pkg), pkg))

        return ret

    def _add_prob_flags(self, *flags):
        for flag in flags:
            if flag not in self.probFilterFlags:
                self.probFilterFlags.append(flag)

    def get_proxies(self, pobj):
        if not pobj:
            return None

        proxy = None
        proxies = None
        repoinfo = pobj.repoInfo()
        reponame = "%s" % repoinfo.name()
        repos = filter(lambda r: r.name == reponame, self.repos)
        repourl = str(repoinfo.baseUrls()[0])

        if repos:
            proxy = repos[0].proxy
        if not proxy:
            proxy = get_proxy_for(repourl)
        if proxy:
            proxies = {str(repourl.split(':')[0]): str(proxy)}

        return proxies

    def get_url(self, pobj):
        if not pobj:
            return None

        name = str(pobj.repoInfo().name())
        try:
            repo = filter(lambda r: r.name == name, self.repos)[0]
        except IndexError:
            return None

        location = pobj.location()
        location = str(location.filename())
        if location.startswith("./"):
            location = location[2:]

        return repo.baseurl[0].join(location)

    def package_url(self, pkgname):

        def cmpEVR(p1, p2):
            ed1 = p1.edition()
            ed2 = p2.edition()
            (e1, v1, r1) = map(str, [ed1.epoch(), ed1.version(), ed1.release()])
            (e2, v2, r2) = map(str, [ed2.epoch(), ed2.version(), ed2.release()])
            return rpm.labelCompare((e1, v1, r1), (e2, v2, r2))

        if not self.Z:
            self.__initialize_zypp()

        q = zypp.PoolQuery()
        q.addKind(zypp.ResKind.package)
        q.setMatchExact()
        q.addAttribute(zypp.SolvAttr.name, pkgname)
        items = sorted(q.queryResults(self.Z.pool()),
                       cmp=lambda x,y: cmpEVR(zypp.asKindPackage(x), zypp.asKindPackage(y)),
                       reverse=True)

        if items:
            item = zypp.asKindPackage(items[0])
            url = self.get_url(item)
            proxies = self.get_proxies(item)
            return (url, proxies)

        return (None, None)
