#!/usr/bin/python

#
# Copyright (c) 2011, Novell Inc.
#
# This program is licensed under the BSD license, read LICENSE.BSD
# for further information
#

# pysolv a little software installer demoing the sat solver library/bindings

# things it does:
# - understands globs for package names / dependencies
# - understands .arch suffix
# - repository data caching
# - on demand loading of secondary repository data
# - checksum verification
# - deltarpm support
# - installation of commandline packages
#
# things not yet ported:
# - gpg verification
# - file conflicts
# - fastestmirror implementation
#
# things available in the library but missing from pysolv:
# - vendor policy loading
# - soft locks file handling
# - multi version handling

import sys
import os
import glob
import solv
import re
import tempfile
import time
import subprocess
import rpm
from stat import *
from iniparse import INIConfig
from optparse import OptionParser

#import gc
#gc.set_debug(gc.DEBUG_LEAK)

class repo_generic(dict):
    def __init__(self, name, type, attribs = {}):
        for k in attribs:
            self[k] = attribs[k]
        self.name = name
        self.type = type

    def calc_cookie_file(self, filename):
        chksum = solv.Chksum(solv.REPOKEY_TYPE_SHA256)
        chksum.add("1.1")
        chksum.add_stat(filename)
        return chksum.raw()

    def calc_cookie_fp(self, fp):
        chksum = solv.Chksum(solv.REPOKEY_TYPE_SHA256)
        chksum.add("1.1");
        chksum.add_fp(fp)
        return chksum.raw()

    def calc_cookie_ext(self, f, cookie):
        chksum = solv.Chksum(solv.REPOKEY_TYPE_SHA256)
        chksum.add("1.1");
        chksum.add(cookie)
        chksum.add_fstat(f.fileno())
        return chksum.raw()

    def cachepath(self, ext = None):
        path = re.sub(r'^\.', '_', self.name)
        if ext:
            path += "_" + ext + ".solvx"
        else:
            path += ".solv"
        return "/var/cache/solv/" + re.sub(r'[/]', '_', path)
        
    def load(self, pool):
        self.handle = pool.add_repo(self.name)
        self.handle.appdata = self
        self.handle.priority = 99 - self['priority']
        dorefresh = bool(int(self['autorefresh']))
        if dorefresh:
            try:
                st = os.stat(self.cachepath())
                if self['metadata_expire'] == -1 or time.time() - st[ST_MTIME] < self['metadata_expire']:
                    dorefresh = False
            except OSError:
                pass
        self['cookie'] = ''
        self['extcookie'] = ''
        if not dorefresh and self.usecachedrepo(None):
            print("repo: '%s': cached" % self.name)
            return True
        return False

    def load_ext(self, repodata):
        return False

    def setfromurls(self, urls):
        if not urls:
            return
        url = urls[0]
        print("[using mirror %s]" % re.sub(r'^(.*?/...*?)/.*$', r'\1', url))
        self['baseurl'] = url

    def setfrommetalink(self, metalink):
        f = self.download(metalink, False, None)
        if not f:
            return None
        f = os.fdopen(f.dup(), 'r')
        urls = []
        chksum = None
        for l in f.readlines():
            l = l.strip()
            m = re.match(r'^<hash type="sha256">([0-9a-fA-F]{64})</hash>', l)
            if m:
                chksum = solv.Chksum(solv.REPOKEY_TYPE_SHA256, m.group(1))
            m = re.match(r'^<url.*>(https?://.+)repodata/repomd.xml</url>', l)
            if m:
                urls.append(m.group(1))
        if not urls:
            chksum = None       # in case the metalink is about a different file
        f.close()
        self.setfromurls(urls)
        return chksum
        
    def setfrommirrorlist(self, mirrorlist):
        f = self.download(mirrorlist, False, None)
        if not f:
            return
        f = os.fdopen(f.dup(), 'r')
        urls = []
        for l in f.readline():
            l = l.strip()
            if l[0:6] == 'http://' or l[0:7] == 'https://':
                urls.append(l)
        self.setfromurls(urls)
        f.close()
        
    def download(self, file, uncompress, chksum, markincomplete=False):
        url = None
        if 'baseurl' not in self:
            if 'metalink' in self:
                if file != self['metalink']:
                    metalinkchksum = self.setfrommetalink(self['metalink'])
                    if file == 'repodata/repomd.xml' and metalinkchksum and not chksum:
                        chksum = metalinkchksum
                else:
                    url = file
            elif 'mirrorlist' in self:
                if file != self['mirrorlist']:
                    self.setfrommirrorlist(self['mirrorlist'])
                else:
                    url = file
        if not url:
            if 'baseurl' not in self:
                print("%s: no baseurl" % self.name)
                return None
            url = re.sub(r'/$', '', self['baseurl']) + '/' + file
        f = tempfile.TemporaryFile()
        st = subprocess.call(['curl', '-f', '-s', '-L', url], stdout=f.fileno())
        if os.lseek(f.fileno(), 0, os.SEEK_CUR) == 0 and (st == 0 or not chksum):
            return None
        os.lseek(f.fileno(), 0, os.SEEK_SET)
        if st:
            print("%s: download error %d" % (file, st))
            if markincomplete:
                self['incomplete'] = True
            return None
        if chksum:
            fchksum = solv.Chksum(chksum.type)
            if not fchksum:
                print("%s: unknown checksum type" % file)
                if markincomplete:
                    self['incomplete'] = True
                return None
            fchksum.add_fd(f.fileno())
            if fchksum != chksum:
                print("%s: checksum mismatch" % file)
                if markincomplete:
                    self['incomplete'] = True
                return None
        if uncompress:
            return solv.xfopen_fd(file, f.fileno())
        return solv.xfopen_fd(None, f.fileno())

    def usecachedrepo(self, ext, mark=False):
        try: 
            repopath = self.cachepath(ext)
            f = open(repopath, 'rb')
            f.seek(-32, os.SEEK_END)
            fcookie = f.read(32)
            if len(fcookie) != 32:
                return False
            if not ext:
                cookie = self['cookie']
            else:
                cookie = self['extcookie']
            if cookie and fcookie != cookie:
                return False
            if self.type != 'system' and not ext:
                f.seek(-32 * 2, os.SEEK_END)
                fextcookie = f.read(32)
                if len(fextcookie) != 32:
                    return False
            f.seek(0)
            f = solv.xfopen_fd('', f.fileno())
            flags = 0
            if ext:
                flags = solv.Repo.REPO_USE_LOADING|solv.Repo.REPO_EXTEND_SOLVABLES
                if ext != 'DL':
                    flags |= solv.Repo.REPO_LOCALPOOL
            if not self.handle.add_solv(f, flags):
                return False
            if self.type != 'system' and not ext:
                self['cookie'] = fcookie
                self['extcookie'] = fextcookie
            if mark:
                # no futimes in python?
                try:
                    os.utime(repopath, None)
                except Exception:
                    pass
        except IOError:
            return False
        return True

    def writecachedrepo(self, ext, repodata=None):
        if 'incomplete' in self:
            return
        tmpname = None
        try:
            if not os.path.isdir("/var/cache/solv"):
                os.mkdir("/var/cache/solv", 0o755)
            (fd, tmpname) = tempfile.mkstemp(prefix='.newsolv-', dir='/var/cache/solv')
            os.fchmod(fd, 0o444)
            f = os.fdopen(fd, 'wb+')
            f = solv.xfopen_fd(None, f.fileno())
            if not repodata:
                self.handle.write(f)
            elif ext:
                repodata.write(f)
            else:       # rewrite_repos case, do not write stubs
                self.handle.write_first_repodata(f)
            f.flush()
            if self.type != 'system' and not ext:
                if not self['extcookie']:
                    self['extcookie'] = self.calc_cookie_ext(f, self['cookie'])
                f.write(self['extcookie'])
            if not ext:
                f.write(self['cookie'])
            else:
                f.write(self['extcookie'])
            f.close
            if self.handle.iscontiguous():
                # switch to saved repo to activate paging and save memory
                nf = solv.xfopen(tmpname)
                if not ext:
                    # main repo
                    self.handle.empty()
                    flags = solv.Repo.SOLV_ADD_NO_STUBS
                    if repodata:
                        flags = 0       # rewrite repos case, recreate stubs
                    if not self.handle.add_solv(nf, flags):
                        sys.exit("internal error, cannot reload solv file")
                else:
                    # extension repodata
                    # need to extend to repo boundaries, as this is how
                    # repodata.write() has written the data
                    repodata.extend_to_repo()
                    flags = solv.Repo.REPO_EXTEND_SOLVABLES
                    if ext != 'DL':
                        flags |= solv.Repo.REPO_LOCALPOOL
                    repodata.add_solv(nf, flags)
            os.rename(tmpname, self.cachepath(ext))
        except (OSError, IOError):
            if tmpname:
                os.unlink(tmpname)

    def updateaddedprovides(self, addedprovides):
        if 'incomplete' in self:
            return 
        if not hasattr(self, 'handle'):
            return 
        if self.handle.isempty():
            return
        # make sure there's just one real repodata with extensions
        repodata = self.handle.first_repodata()
        if not repodata:
            return
        oldaddedprovides = repodata.lookup_idarray(solv.SOLVID_META, solv.REPOSITORY_ADDEDFILEPROVIDES)
        if not set(addedprovides) <= set(oldaddedprovides):
            for id in addedprovides:
                repodata.add_idarray(solv.SOLVID_META, solv.REPOSITORY_ADDEDFILEPROVIDES, id)
            repodata.internalize()
            self.writecachedrepo(None, repodata)

    def packagespath(self):
        return ''

    def add_ext_keys(self, ext, repodata, handle):
        if ext == 'DL':
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.REPOSITORY_DELTAINFO)
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.REPOKEY_TYPE_FLEXARRAY)
        elif ext == 'DU':
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.SOLVABLE_DISKUSAGE)
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.REPOKEY_TYPE_DIRNUMNUMARRAY)
        elif ext == 'FL':
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.SOLVABLE_FILELIST)
            repodata.add_idarray(handle, solv.REPOSITORY_KEYS, solv.REPOKEY_TYPE_DIRSTRARRAY)
        else:
            for langtag, langtagtype in [
                (solv.SOLVABLE_SUMMARY, solv.REPOKEY_TYPE_STR),
                (solv.SOLVABLE_DESCRIPTION, solv.REPOKEY_TYPE_STR),
                (solv.SOLVABLE_EULA, solv.REPOKEY_TYPE_STR),
                (solv.SOLVABLE_MESSAGEINS, solv.REPOKEY_TYPE_STR),
                (solv.SOLVABLE_MESSAGEDEL, solv.REPOKEY_TYPE_STR),
                (solv.SOLVABLE_CATEGORY, solv.REPOKEY_TYPE_ID)
            ]:
                repodata.add_idarray(handle, solv.REPOSITORY_KEYS, self.handle.pool.id2langid(langtag, ext, 1))
                repodata.add_idarray(handle, solv.REPOSITORY_KEYS, langtagtype)
        

class repo_repomd(repo_generic):
    def load(self, pool):
        if super(repo_repomd, self).load(pool):
            return True
        sys.stdout.write("rpmmd repo '%s': " % self.name)
        sys.stdout.flush()
        f = self.download("repodata/repomd.xml", False, None, None)
        if not f:
            print("no repomd.xml file, skipped")
            self.handle.free(True)
            del self.handle
            return False
        self['cookie'] = self.calc_cookie_fp(f)
        if self.usecachedrepo(None, True):
            print("cached")
            return True
        self.handle.add_repomdxml(f, 0)
        print("fetching")
        (filename, filechksum) = self.find('primary')
        if filename:
            f = self.download(filename, True, filechksum, True)
            if f:
                self.handle.add_rpmmd(f, None, 0)
            if 'incomplete' in self:
                return False # hopeless, need good primary
        (filename, filechksum) = self.find('updateinfo')
        if filename:
            f = self.download(filename, True, filechksum, True)
            if f:
                self.handle.add_updateinfoxml(f, 0)
        self.add_exts()
        self.writecachedrepo(None)
        # must be called after writing the repo
        self.handle.create_stubs()
        return True

    def find(self, what):
        di = self.handle.Dataiterator_meta(solv.REPOSITORY_REPOMD_TYPE, what, solv.Dataiterator.SEARCH_STRING)
        di.prepend_keyname(solv.REPOSITORY_REPOMD)
        for d in di:
            dp = d.parentpos()
            filename = dp.lookup_str(solv.REPOSITORY_REPOMD_LOCATION)
            chksum = dp.lookup_checksum(solv.REPOSITORY_REPOMD_CHECKSUM)
            if filename and not chksum:
                print("no %s file checksum!" % filename)
                filename = None
                chksum = None
            if filename:
                return (filename, chksum)
        return (None, None)
        
    def add_ext(self, repodata, what, ext):
        filename, chksum = self.find(what)
        if not filename and what == 'deltainfo':
            filename, chksum = self.find('prestodelta')
        if not filename:
            return
        handle = repodata.new_handle()
        repodata.set_poolstr(handle, solv.REPOSITORY_REPOMD_TYPE, what)
        repodata.set_str(handle, solv.REPOSITORY_REPOMD_LOCATION, filename)
        repodata.set_checksum(handle, solv.REPOSITORY_REPOMD_CHECKSUM, chksum)
        self.add_ext_keys(ext, repodata, handle)
        repodata.add_flexarray(solv.SOLVID_META, solv.REPOSITORY_EXTERNAL, handle)

    def add_exts(self):
        repodata = self.handle.add_repodata(0)
        repodata.extend_to_repo()
        self.add_ext(repodata, 'deltainfo', 'DL')
        self.add_ext(repodata, 'filelists', 'FL')
        repodata.internalize()
    
    def load_ext(self, repodata):
        repomdtype = repodata.lookup_str(solv.SOLVID_META, solv.REPOSITORY_REPOMD_TYPE)
        if repomdtype == 'filelists':
            ext = 'FL'
        elif repomdtype == 'deltainfo':
            ext = 'DL'
        else:
            return False
        sys.stdout.write("[%s:%s: " % (self.name, ext))
        if self.usecachedrepo(ext):
            sys.stdout.write("cached]\n")
            sys.stdout.flush()
            return True
        sys.stdout.write("fetching]\n")
        sys.stdout.flush()
        filename = repodata.lookup_str(solv.SOLVID_META, solv.REPOSITORY_REPOMD_LOCATION)
        filechksum = repodata.lookup_checksum(solv.SOLVID_META, solv.REPOSITORY_REPOMD_CHECKSUM)
        f = self.download(filename, True, filechksum)
        if not f:
            return False
        if ext == 'FL':
            self.handle.add_rpmmd(f, 'FL', solv.Repo.REPO_USE_LOADING|solv.Repo.REPO_EXTEND_SOLVABLES|solv.Repo.REPO_LOCALPOOL)
        elif ext == 'DL':
            self.handle.add_deltainfoxml(f, solv.Repo.REPO_USE_LOADING)
        self.writecachedrepo(ext, repodata)
        return True

class repo_susetags(repo_generic):
    def load(self, pool):
        if super(repo_susetags, self).load(pool):
            return True
        sys.stdout.write("susetags repo '%s': " % self.name)
        sys.stdout.flush()
        f = self.download("content", False, None, None)
        if not f:
            print("no content file, skipped")
            self.handle.free(True)
            del self.handle
            return False
        self['cookie'] = self.calc_cookie_fp(f)
        if self.usecachedrepo(None, True):
            print("cached")
            return True
        self.handle.add_content(f, 0)
        print("fetching")
        defvendorid = self.handle.meta.lookup_id(solv.SUSETAGS_DEFAULTVENDOR)
        descrdir = self.handle.meta.lookup_str(solv.SUSETAGS_DESCRDIR)
        if not descrdir:
            descrdir = "suse/setup/descr"
        (filename, filechksum) = self.find('packages.gz')
        if not filename:
            (filename, filechksum) = self.find('packages')
        if filename:
            f = self.download(descrdir + '/' + filename, True, filechksum, True)
            if f:
                self.handle.add_susetags(f, defvendorid, None, solv.Repo.REPO_NO_INTERNALIZE|solv.Repo.SUSETAGS_RECORD_SHARES)
                (filename, filechksum) = self.find('packages.en.gz')
                if not filename:
                    (filename, filechksum) = self.find('packages.en')
                if filename:
                    f = self.download(descrdir + '/' + filename, True, filechksum, True)
                    if f:
                        self.handle.add_susetags(f, defvendorid, None, solv.Repo.REPO_NO_INTERNALIZE|solv.Repo.REPO_REUSE_REPODATA|solv.Repo.REPO_EXTEND_SOLVABLES)
                self.handle.internalize()
        self.add_exts()
        self.writecachedrepo(None)
        # must be called after writing the repo
        self.handle.create_stubs()
        return True

    def find(self, what):
        di = self.handle.Dataiterator_meta(solv.SUSETAGS_FILE_NAME, what, solv.Dataiterator.SEARCH_STRING)
        di.prepend_keyname(solv.SUSETAGS_FILE)
        for d in di:
            dp = d.parentpos()
            chksum = dp.lookup_checksum(solv.SUSETAGS_FILE_CHECKSUM)
            return (what, chksum)
        return (None, None)

    def add_ext(self, repodata, what, ext):
        (filename, chksum) = self.find(what)
        if not filename:
            return
        handle = repodata.new_handle()
        repodata.set_str(handle, solv.SUSETAGS_FILE_NAME, filename)
        if chksum:
            repodata.set_checksum(handle, solv.SUSETAGS_FILE_CHECKSUM, chksum)
        self.add_ext_keys(ext, repodata, handle)
        repodata.add_flexarray(solv.SOLVID_META, solv.REPOSITORY_EXTERNAL, handle)
        
    def add_exts(self):
        repodata = self.handle.add_repodata(0)
        di = self.handle.Dataiterator_meta(solv.SUSETAGS_FILE_NAME, None, 0)
        di.prepend_keyname(solv.SUSETAGS_FILE)
        for d in di:
            filename = d.str
            if not filename:
                continue
            if filename[0:9] != "packages.":
                continue
            if len(filename) == 11 and filename != "packages.gz":
                ext = filename[9:11]
            elif filename[11:12] == ".":
                ext = filename[9:11]
            else:
                continue
            if ext == "en":
                continue
            self.add_ext(repodata, filename, ext)
        repodata.internalize()

    def load_ext(self, repodata):
        filename = repodata.lookup_str(solv.SOLVID_META, solv.SUSETAGS_FILE_NAME)
        ext = filename[9:11]
        sys.stdout.write("[%s:%s: " % (self.name, ext))
        if self.usecachedrepo(ext):
            sys.stdout.write("cached]\n")
            sys.stdout.flush()
            return True
        sys.stdout.write("fetching]\n")
        sys.stdout.flush()
        defvendorid = self.handle.meta.lookup_id(solv.SUSETAGS_DEFAULTVENDOR)
        descrdir = self.handle.meta.lookup_str(solv.SUSETAGS_DESCRDIR)
        if not descrdir:
            descrdir = "suse/setup/descr"
        filechksum = repodata.lookup_checksum(solv.SOLVID_META, solv.SUSETAGS_FILE_CHECKSUM)
        f = self.download(descrdir + '/' + filename, True, filechksum)
        if not f:
            return False
        flags = solv.Repo.REPO_USE_LOADING|solv.Repo.REPO_EXTEND_SOLVABLES
        if ext != 'DL':
            flags |= solv.Repo.REPO_LOCALPOOL
        self.handle.add_susetags(f, defvendorid, ext, flags)
        self.writecachedrepo(ext, repodata)
        return True

    def packagespath(self):
        datadir = repo.handle.meta.lookup_str(solv.SUSETAGS_DATADIR)
        if not datadir:
            datadir = 'suse'
        return datadir + '/'

class repo_unknown(repo_generic):
    def load(self, pool):
        print("unsupported repo '%s': skipped" % self.name)
        return False

class repo_system(repo_generic):
    def load(self, pool):
        self.handle = pool.add_repo(self.name)
        self.handle.appdata = self
        pool.installed = self.handle
        sys.stdout.write("rpm database: ")
        self['cookie'] = self.calc_cookie_file("/var/lib/rpm/Packages")
        if self.usecachedrepo(None):
            print("cached")
            return True
        print("reading")
        if hasattr(self.handle.__class__, 'add_products'):
            self.handle.add_products("/etc/products.d", solv.Repo.REPO_NO_INTERNALIZE)
        f = solv.xfopen(self.cachepath())
        self.handle.add_rpmdb_reffp(f, solv.Repo.REPO_REUSE_REPODATA)
        self.writecachedrepo(None)
        return True

class repo_cmdline(repo_generic):
    def load(self, pool):
        self.handle = pool.add_repo(self.name)
        self.handle.appdata = self 
        return True

def load_stub(repodata):
    repo = repodata.repo.appdata
    if repo:
        return repo.load_ext(repodata)
    return False


parser = OptionParser(usage="usage: solv.py [options] COMMAND")
parser.add_option('-r', '--repo', action="append", type="string", dest="repos", help="limit to specified repositories")
parser.add_option('--best', action="store_true", dest="best", help="force installation/update to best packages")
parser.add_option('--clean', action="store_true", dest="clean", help="delete no longer needed packages")
(options, args) = parser.parse_args()
if not args:
    parser.print_help(sys.stderr)
    sys.exit(1)

cmd = args[0]
args = args[1:]

cmdabbrev = {'ls': 'list', 'in': 'install', 'rm': 'erase', 've': 'verify', 'se': 'search'}
if cmd in cmdabbrev:
    cmd = cmdabbrev[cmd]

cmdactionmap = {
  'install': solv.Job.SOLVER_INSTALL,
  'erase':   solv.Job.SOLVER_ERASE,
  'up':      solv.Job.SOLVER_UPDATE,
  'dup':     solv.Job.SOLVER_DISTUPGRADE,
  'verify':  solv.Job.SOLVER_VERIFY,
  'list':    0,
  'info':    0
}

# read all repo configs
repos = []
reposdirs = []
if os.path.isdir("/etc/zypp/repos.d"):
  reposdirs = [ "/etc/zypp/repos.d" ]
else:
  reposdirs = [ "/etc/yum/repos.d" ]

for reposdir in reposdirs:
    if not os.path.isdir(reposdir):
        continue
    for reponame in sorted(glob.glob('%s/*.repo' % reposdir)):
        cfg = INIConfig(open(reponame))
        for alias in cfg:
            repoattr = {'enabled': 0, 'priority': 99, 'autorefresh': 1, 'type': 'rpm-md', 'metadata_expire': 900}
            for k in cfg[alias]:
                repoattr[k] = cfg[alias][k]
            if 'mirrorlist' in repoattr and 'metalink' not in repoattr:
                if repoattr['mirrorlist'].find('/metalink'):
                    repoattr['metalink'] = repoattr['mirrorlist']
                    del repoattr['mirrorlist']
            if repoattr['type'] == 'rpm-md':
                repo = repo_repomd(alias, 'repomd', repoattr)
            elif repoattr['type'] == 'yast2':
                repo = repo_susetags(alias, 'susetags', repoattr)
            else:
                repo = repo_unknown(alias, 'unknown', repoattr)
            repos.append(repo)

pool = solv.Pool()
pool.setarch()
pool.set_loadcallback(load_stub)

# now load all enabled repos into the pool
sysrepo = repo_system('@System', 'system')
sysrepo.load(pool)
for repo in repos:
    if int(repo['enabled']):
        repo.load(pool)
    
repofilter = None
if options.repos:
    for reponame in options.repos:
        mrepos = [ repo for repo in repos if repo.name == reponame ]
        if not mrepos:
            print("no repository matches '%s'" % reponame)
            sys.exit(1)
        repo = mrepos[0]
        if hasattr(repo, 'handle'):
            if not repofilter:
                repofilter = pool.Selection()
            repofilter.add(repo.handle.Selection(solv.Job.SOLVER_SETVENDOR))

if cmd == 'search':
    pool.createwhatprovides()
    sel = pool.Selection()
    di = pool.Dataiterator(solv.SOLVABLE_NAME, args[0], solv.Dataiterator.SEARCH_SUBSTRING|solv.Dataiterator.SEARCH_NOCASE)
    for d in di:
        sel.add_raw(solv.Job.SOLVER_SOLVABLE, d.solvid)
    if repofilter:
       sel.filter(repofilter)
    for s in sel.solvables():
        print(" - %s [%s]: %s" % (s, s.repo.name, s.lookup_str(solv.SOLVABLE_SUMMARY)))
    sys.exit(0)

if cmd not in cmdactionmap:
    print("unknown command %s" % cmd)
    sys.exit(1)

cmdlinerepo = None
if cmd == 'list' or cmd == 'info' or cmd == 'install':
    for arg in args:
        if arg.endswith(".rpm") and os.access(arg, os.R_OK):
            if not cmdlinerepo:
                cmdlinerepo = repo_cmdline('@commandline', 'cmdline')
                cmdlinerepo.load(pool)
                cmdlinerepo['packages'] = {}
            s = cmdlinerepo.handle.add_rpm(arg, solv.Repo.REPO_REUSE_REPODATA|solv.Repo.REPO_NO_INTERNALIZE)
            if not s:
                print(pool.errstr)
                sys.exit(1)
            cmdlinerepo['packages'][arg] = s
    if cmdlinerepo:
        cmdlinerepo.handle.internalize()

addedprovides = pool.addfileprovides_queue()
if addedprovides:
    sysrepo.updateaddedprovides(addedprovides)
    for repo in repos:
        repo.updateaddedprovides(addedprovides)

pool.createwhatprovides()

# convert arguments into jobs
jobs = []
for arg in args:
    if cmdlinerepo and arg in cmdlinerepo['packages']:
        jobs.append(pool.Job(solv.Job.SOLVER_SOLVABLE, cmdlinerepo['packages'][arg].id))
    else:
        flags = solv.Selection.SELECTION_NAME|solv.Selection.SELECTION_PROVIDES|solv.Selection.SELECTION_GLOB
        flags |= solv.Selection.SELECTION_CANON|solv.Selection.SELECTION_DOTARCH|solv.Selection.SELECTION_REL
        if len(arg) and arg[0] == '/':
            flags |= solv.Selection.SELECTION_FILELIST
            if cmd == 'erase':
                flags |= solv.Selection.SELECTION_INSTALLED_ONLY
        sel = pool.select(arg, flags)
        if repofilter:
           sel.filter(repofilter)
        if sel.isempty():
            sel = pool.select(arg, flags | solv.Selection.SELECTION_NOCASE)
            if repofilter:
               sel.filter(repofilter)
            if not sel.isempty():
                print("[ignoring case for '%s']" % arg)
        if sel.isempty():
            print("nothing matches '%s'" % arg)
            sys.exit(1)
        if sel.flags & solv.Selection.SELECTION_FILELIST:
            print("[using file list match for '%s']" % arg)
        if sel.flags & solv.Selection.SELECTION_PROVIDES:
            print("[using capability match for '%s']" % arg)
        jobs += sel.jobs(cmdactionmap[cmd])

if not jobs and (cmd == 'up' or cmd == 'dup' or cmd == 'verify' or repofilter):
    sel = pool.Selection_all()
    if repofilter:
       sel.filter(repofilter)
    jobs += sel.jobs(cmdactionmap[cmd])

if not jobs:
    print("no package matched.")
    sys.exit(1)

if cmd == 'list' or cmd == 'info':
    for job in jobs:
        for s in job.solvables():
            if cmd == 'info':
                print("Name:        %s" % s)
                print("Repo:        %s" % s.repo)
                print("Summary:     %s" % s.lookup_str(solv.SOLVABLE_SUMMARY))
                str = s.lookup_str(solv.SOLVABLE_URL)
                if str:
                    print("Url:         %s" % str)
                str = s.lookup_str(solv.SOLVABLE_LICENSE)
                if str:
                    print("License:     %s" % str)
                print("Description:\n%s" % s.lookup_str(solv.SOLVABLE_DESCRIPTION))
                print('')
            else:
                print("  - %s [%s]" % (s, s.repo))
                print("    %s" % s.lookup_str(solv.SOLVABLE_SUMMARY))
    sys.exit(0)

# up magic: use install instead of update if no installed package matches
for job in jobs:
    if cmd == 'up' and job.isemptyupdate():
        job.how ^= solv.Job.SOLVER_UPDATE ^ solv.Job.SOLVER_INSTALL
    if options.best:
        job.how |= solv.Job.SOLVER_FORCEBEST
    if options.clean:
        job.how |= solv.Job.SOLVER_CLEANDEPS

#pool.set_debuglevel(2)
solver = pool.Solver()
solver.set_flag(solv.Solver.SOLVER_FLAG_SPLITPROVIDES, 1);
if cmd == 'erase':
    solver.set_flag(solv.Solver.SOLVER_FLAG_ALLOW_UNINSTALL, 1);

while True:
    problems = solver.solve(jobs)
    if not problems:
        break
    for problem in problems:
        print("Problem %d/%d:" % (problem.id, len(problems)))
        print(problem)
        solutions = problem.solutions()
        for solution in solutions:
            print("  Solution %d:" % solution.id)
            elements = solution.elements(True)
            for element in elements:
                print("  - %s" % element.str())
            print('')
        sol = ''
        while not (sol == 's' or sol == 'q' or (sol.isdigit() and int(sol) >= 1 and int(sol) <= len(solutions))):
            sys.stdout.write("Please choose a solution: ")
            sys.stdout.flush()
            sol = sys.stdin.readline().strip()
        if sol == 's':
            continue        # skip problem
        if sol == 'q':
            sys.exit(1)
        solution = solutions[int(sol) - 1]
        for element in solution.elements():
            newjob = element.Job()
            if element.type == solv.Solver.SOLVER_SOLUTION_JOB:
                jobs[element.jobidx] = newjob
            else:
                if newjob and newjob not in jobs:
                    jobs.append(newjob)
                    
# no problems, show transaction
trans = solver.transaction()
del solver
if trans.isempty():
    print("Nothing to do.")
    sys.exit(0)
print('')
print("Transaction summary:")
print('')
for cl in trans.classify(solv.Transaction.SOLVER_TRANSACTION_SHOW_OBSOLETES | solv.Transaction.SOLVER_TRANSACTION_OBSOLETE_IS_UPGRADE):
    if cl.type == solv.Transaction.SOLVER_TRANSACTION_ERASE:
        print("%d erased packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_INSTALL:
        print("%d installed packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_REINSTALLED:
        print("%d reinstalled packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_DOWNGRADED:
        print("%d downgraded packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_CHANGED:
        print("%d changed packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_UPGRADED:
        print("%d upgraded packages:" % cl.count)
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_VENDORCHANGE:
        print("%d vendor changes from '%s' to '%s':" % (cl.count, cl.fromstr, cl.tostr))
    elif cl.type == solv.Transaction.SOLVER_TRANSACTION_ARCHCHANGE:
        print("%d arch changes from '%s' to '%s':" % (cl.count, cl.fromstr, cl.tostr))
    else:
        continue
    for p in cl.solvables():
        if cl.type == solv.Transaction.SOLVER_TRANSACTION_UPGRADED or cl.type == solv.Transaction.SOLVER_TRANSACTION_DOWNGRADED:
            op = trans.othersolvable(p)
            print("  - %s -> %s" % (p, op))
        else:
            print("  - %s" % p)
    print('')
print("install size change: %d K" % trans.calc_installsizechange())
print('')

while True:
    sys.stdout.write("OK to continue (y/n)? ")
    sys.stdout.flush()
    yn = sys.stdin.readline().strip()
    if yn == 'y': break
    if yn == 'n' or yn == 'q': sys.exit(1)
newpkgs = trans.newsolvables()
newpkgsfp = {}
if newpkgs:
    downloadsize = 0
    for p in newpkgs:
        downloadsize += p.lookup_num(solv.SOLVABLE_DOWNLOADSIZE)
    print("Downloading %d packages, %d K" % (len(newpkgs), downloadsize / 1024))
    for p in newpkgs:
        repo = p.repo.appdata
        location, medianr = p.lookup_location()
        if not location:
            continue
        if repo.type == 'commandline':
            f = solv.xfopen(location)
            if not f:
                sys.exit("\n%s: %s not found" % location)
            newpkgsfp[p.id] = f
            continue
        if not sysrepo.handle.isempty() and os.access('/usr/bin/applydeltarpm', os.X_OK):
            pname = p.name
            di = p.repo.Dataiterator_meta(solv.DELTA_PACKAGE_NAME, pname, solv.Dataiterator.SEARCH_STRING)
            di.prepend_keyname(solv.REPOSITORY_DELTAINFO)
            for d in di:
                dp = d.parentpos()
                if dp.lookup_id(solv.DELTA_PACKAGE_EVR) != p.evrid or dp.lookup_id(solv.DELTA_PACKAGE_ARCH) != p.archid:
                    continue
                baseevrid = dp.lookup_id(solv.DELTA_BASE_EVR)
                candidate = None
                for installedp in pool.whatprovides(p.nameid):
                    if installedp.isinstalled() and installedp.nameid == p.nameid and installedp.archid == p.archid and installedp.evrid == baseevrid:
                        candidate = installedp
                if not candidate:
                    continue
                seq = dp.lookup_deltaseq()
                st = subprocess.call(['/usr/bin/applydeltarpm', '-a', p.arch, '-c', '-s', seq])
                if st:
                    continue
                chksum = dp.lookup_checksum(solv.DELTA_CHECKSUM)
                if not chksum:
                    continue
                dloc, dmedianr = dp.lookup_deltalocation()
                dloc = repo.packagespath() + dloc
                f = repo.download(dloc, False, chksum)
                if not f:
                    continue
                nf = tempfile.TemporaryFile()
                nf = os.dup(nf.fileno())   # get rid of CLOEXEC
                f.cloexec(0)
                st = subprocess.call(['/usr/bin/applydeltarpm', '-a', p.arch, "/dev/fd/%d" % f.fileno(), "/dev/fd/%d" % nf])
                if st:
                    os.close(nf)
                    continue
                os.lseek(nf, 0, os.SEEK_SET)
                newpkgsfp[p.id] = solv.xfopen_fd("", nf)
                os.close(nf)
                break
            if p.id in newpkgsfp:
                sys.stdout.write("d")
                sys.stdout.flush()
                continue
                    
        chksum = p.lookup_checksum(solv.SOLVABLE_CHECKSUM)
        location = repo.packagespath() + location
        f = repo.download(location, False, chksum)
        if not f:
            sys.exit("\n%s: %s not found in repository" % (repo.name, location))
        newpkgsfp[p.id] = f
        sys.stdout.write(".")
        sys.stdout.flush()
    print('')
print("Committing transaction:")
print('')
ts = rpm.TransactionSet('/')
ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES)
erasenamehelper = {}
for p in trans.steps():
    type = trans.steptype(p, solv.Transaction.SOLVER_TRANSACTION_RPM_ONLY)
    if type == solv.Transaction.SOLVER_TRANSACTION_ERASE:
        rpmdbid = p.lookup_num(solv.RPM_RPMDBID)
        erasenamehelper[p.name] = p
        if not rpmdbid:
            sys.exit("\ninternal error: installed package %s has no rpmdbid\n" % p)
        ts.addErase(rpmdbid)
    elif type == solv.Transaction.SOLVER_TRANSACTION_INSTALL:
        f = newpkgsfp[p.id]
        h = ts.hdrFromFdno(f.fileno())
        os.lseek(f.fileno(), 0, os.SEEK_SET)
        ts.addInstall(h, p, 'u')
    elif type == solv.Transaction.SOLVER_TRANSACTION_MULTIINSTALL:
        f = newpkgsfp[p.id]
        h = ts.hdrFromFdno(f.fileno())
        os.lseek(f.fileno(), 0, os.SEEK_SET)
        ts.addInstall(h, p, 'i')
checkproblems = ts.check()
if checkproblems:
    print(checkproblems)
    sys.exit("Sorry.")
ts.order()
def runCallback(reason, amount, total, p, d):
    if reason == rpm.RPMCALLBACK_INST_OPEN_FILE:
        return newpkgsfp[p.id].fileno()
    if reason == rpm.RPMCALLBACK_INST_START:
        print("install %s" % p)
    if reason == rpm.RPMCALLBACK_UNINST_START:
        # argh, p is just the name of the package
        if p in erasenamehelper:
            p = erasenamehelper[p]
            print("erase %s" % p)
runproblems = ts.run(runCallback, '')
if runproblems:
    print(runproblems)
    sys.exit(1)
sys.exit(0)

# vim: sw=4 et