libsolv/examples/rbsolv

#!/usr/bin/ruby

require 'solv'
require 'rubygems'
require 'inifile'
require 'tempfile'

class Repo_generic
  def initialize(name, type, attribs = {})
    @name = name
    @type = type
    @attribs = attribs.dup
    @incomplete = false
  end

  def enabled?
    return @attribs['enabled'].to_i != 0
  end

  def autorefresh?
    return @attribs['autorefresh'].to_i != 0
  end

  def id
    return @handle ? @handle.id : 0
  end

  def calc_cookie_fp(f)
    chksum = Solv::Chksum.new(Solv::REPOKEY_TYPE_SHA256)
    chksum.add("1.1")
    chksum.add_fp(f)
    return chksum.raw
  end

  def calc_cookie_file(filename)
    chksum = Solv::Chksum.new(Solv::REPOKEY_TYPE_SHA256)
    chksum.add("1.1")
    chksum.add_stat(filename)
    return chksum.raw
  end

  def calc_cookie_ext(f, cookie)
    chksum = Solv::Chksum.new(Solv::REPOKEY_TYPE_SHA256)
    chksum.add("1.1")
    chksum.add(cookie)
    chksum.add_fstat(f.fileno)
    return chksum.raw()
  end

  def cachepath(ext = nil)
    path = @name.sub(/^\./, '_')
    path += ext ? "_#{ext}.solvx" : '.solv'
    return '/var/cache/solv/' + path.gsub(/\//, '_')
  end

  def load(pool)
    @handle = pool.add_repo(@name)
    @handle.appdata = self
    @handle.priority = 99 - @attribs['priority'].to_i if @attribs['priority']
    dorefresh = autorefresh?
    if dorefresh
      begin
	s = File.stat(cachepath)
	dorefresh = false if s && (@attribs['metadata_expire'].to_i == -1 || Time.now - s.mtime < @attribs['metadata_expire'].to_i)
      rescue SystemCallError
      end
    end
    @cookie = nil
    @extcookie = nil
    if !dorefresh && usecachedrepo(nil)
      puts "repo: '#{@name}' cached"
      return true
    end
    return false
  end

  def load_ext(repodata)
    return false
  end

  def download(file, uncompress, chksum, markincomplete = false)
    url = @attribs['baseurl']
    if !url
      puts "%{@name}: no baseurl"
      return nil
    end
    url = url.sub(/\/$/, '') + "/#{file}"
    f =  Tempfile.new('rbsolv')
    f.unlink
    st = system('curl', '-f', '-s', '-L', '-o', "/dev/fd/" + f.fileno.to_s, '--', url)
    return nil if f.stat.size == 0 && (st || !chksum)
    if !st
	puts "#{file}: download error #{$? >> 8}"
	@incomplete = true if markincomplete
	return nil
    end
    if chksum
      fchksum = Solv::Chksum.new(chksum.type)
      fchksum.add_fd(f.fileno)
      if !fchksum == chksum
	puts "#{file}: checksum error"
	@incomplete = true if markincomplete
	return nil
      end
    end
    rf = nil
    if uncompress
      rf = Solv::xfopen_fd(file, f.fileno)
    else
      rf = Solv::xfopen_fd('', f.fileno)
    end
    f.close
    return rf
  end

  def usecachedrepo(ext, mark = false)
    cookie = ext ? @extcookie : @cookie
    begin
      repopath = cachepath(ext)
      f = File.new(repopath, "r")
      f.sysseek(-32, IO::SEEK_END)
      fcookie = f.sysread(32)
      return false if fcookie.length != 32
      return false if cookie && fcookie != cookie
      if !ext && @type != 'system'
	f.sysseek(-32 * 2, IO::SEEK_END)
	fextcookie = f.sysread(32)
	return false if fextcookie.length != 32
      end
      f.sysseek(0, IO::SEEK_SET)
      nf = Solv::xfopen_fd('', f.fileno)
      f.close
      flags = ext ? Solv::Repo::REPO_USE_LOADING|Solv::Repo::REPO_EXTEND_SOLVABLES : 0
      flags |= Solv::Repo::REPO_LOCALPOOL if ext && ext != 'DL'
      if ! @handle.add_solv(nf, flags)
	nf.close
	return false
      end
      nf.close()
      @cookie = fcookie unless ext
      @extcookie = fextcookie if !ext && @type != 'system'
      now = Time.now
      begin
	File::utime(now, now, repopath) if mark
      rescue SystemCallError
      end
      return true
    rescue SystemCallError
      return false
    end
    return true
  end

  def writecachedrepo(ext, repodata = nil)
    return if @incomplete
    begin
      Dir::mkdir("/var/cache/solv", 0755) unless FileTest.directory?("/var/cache/solv")
      f =  Tempfile.new('.newsolv-', '/var/cache/solv')
      f.chmod(0444)
      sf = Solv::xfopen_fd('', f.fileno)
      if !repodata
	@handle.write(sf)
      elsif ext
	repodata.write(sf)
      else
	@handle.write_first_repodata(sf)
      end
      sf.close
      f.sysseek(0, IO::SEEK_END)
      if @type != 'system' && !ext
	@extcookie = calc_cookie_ext(f, @cookie) unless @extcookie
	f.syswrite(@extcookie)
      end
      f.syswrite(ext ? @extcookie : @cookie)
      f.close
      if @handle.iscontiguous?
	sf = Solv::xfopen(f.path)
	if sf
	  if !ext
	    @handle.empty()
	    abort("internal error, cannot reload solv file") unless @handle.add_solv(sf, repodata ? 0 : Solv::Repo::SOLV_ADD_NO_STUBS)
	  else
	    repodata.extend_to_repo()
	    flags = Solv::Repo::REPO_EXTEND_SOLVABLES
	    flags |= Solv::Repo::REPO_LOCALPOOL if ext != 'DL'
	    repodata.add_solv(sf, flags)
	  end
	  sf.close
	end
      end
      File.rename(f.path, cachepath(ext))
      f.unlink
      return true
    rescue SystemCallError
      return false
    end
  end

  def updateaddedprovides(addedprovides)
    return if @incomplete
    return unless @handle && !@handle.isempty?
    repodata = @handle.first_repodata()
    return unless repodata
    oldaddedprovides = repodata.lookup_idarray(Solv::SOLVID_META, Solv::REPOSITORY_ADDEDFILEPROVIDES)
    return if (oldaddedprovides | addedprovides) == oldaddedprovides
    for id in addedprovides
      repodata.add_idarray(Solv::SOLVID_META, Solv::REPOSITORY_ADDEDFILEPROVIDES, id)
    end
    repodata.internalize()
    writecachedrepo(nil, repodata)
  end

  def packagespath()
    return ''
  end

  @@langtags = {
    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,
  }

  def add_ext_keys(ext, repodata, h)
    if ext == 'DL'
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::REPOSITORY_DELTAINFO)
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::REPOKEY_TYPE_FLEXARRAY)
    elsif ext == 'DU'
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::SOLVABLE_DISKUSAGE)
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::REPOKEY_TYPE_DIRNUMNUMARRAY)
    elsif ext == 'FL'
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::SOLVABLE_FILELIST)
      repodata.add_idarray(h, Solv::REPOSITORY_KEYS, Solv::REPOKEY_TYPE_DIRSTRARRAY)
    else
      @@langtags.sort.each do |langid, langtype|
	repodata.add_idarray(h, Solv::REPOSITORY_KEYS, @handle.pool.id2langid(langid, ext, true))
	repodata.add_idarray(h, Solv::REPOSITORY_KEYS, langtype)
      end
    end
  end
end

class Repo_rpmmd < Repo_generic

  def find(what)
    di = @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)
      next unless filename
      checksum = dp.lookup_checksum(Solv::REPOSITORY_REPOMD_CHECKSUM)
      if !checksum
	puts "no #{filename} checksum!"
	return nil, nil
      end
      return filename, checksum
    end
    return nil, nil
  end

  def load(pool)
    return true if super(pool)
    print "rpmmd repo '#{@name}: "
    f = download("repodata/repomd.xml", false, nil, nil)
    if !f
      puts "no repomd.xml file, skipped"
      @handle.free(true)
      @handle = nil
      return false
    end
    @cookie = calc_cookie_fp(f)
    if usecachedrepo(nil, true)
      puts "cached"
      f.close
      return true
    end
    @handle.add_repomdxml(f, 0)
    f.close
    puts "fetching"
    filename, filechksum = find('primary')
    if filename
      f = download(filename, true, filechksum, true)
      if f
	@handle.add_rpmmd(f, nil, 0)
	f.close
      end
      return false if @incomplete
    end
    filename, filechksum = find('updateinfo')
    if filename
      f = download(filename, true, filechksum, true)
      if f
	@handle.add_updateinfoxml(f, 0)
	f.close
      end
    end
    add_exts()
    writecachedrepo(nil)
    @handle.create_stubs()
    return true
  end

  def add_ext(repodata, what, ext)
    filename, filechksum = find(what)
    filename, filechksum = find('prestodelta') if !filename && what == 'deltainfo'
    return unless filename
    h = repodata.new_handle()
    repodata.set_poolstr(h, Solv::REPOSITORY_REPOMD_TYPE, what)
    repodata.set_str(h, Solv::REPOSITORY_REPOMD_LOCATION, filename)
    repodata.set_checksum(h, Solv::REPOSITORY_REPOMD_CHECKSUM, filechksum)
    add_ext_keys(ext, repodata, h)
    repodata.add_flexarray(Solv::SOLVID_META, Solv::REPOSITORY_EXTERNAL, h)
  end

  def add_exts
    repodata = @handle.add_repodata(0)
    repodata.extend_to_repo()
    add_ext(repodata, 'deltainfo', 'DL')
    add_ext(repodata, 'filelists', 'FL')
    repodata.internalize()
  end

  def load_ext(repodata)
    repomdtype = repodata.lookup_str(Solv::SOLVID_META, Solv::REPOSITORY_REPOMD_TYPE)
    if repomdtype == 'filelists'
      ext = 'FL'
    elsif repomdtype == 'deltainfo'
      ext = 'DL'
    else
      return false
    end
    print "[#{@name}:#{ext}: "
    STDOUT.flush
    if usecachedrepo(ext)
      puts "cached]\n"
      return true
    end
    puts "fetching]\n"
    filename = repodata.lookup_str(Solv::SOLVID_META, Solv::REPOSITORY_REPOMD_LOCATION)
    filechksum = repodata.lookup_checksum(Solv::SOLVID_META, Solv::REPOSITORY_REPOMD_CHECKSUM)
    f = download(filename, true, filechksum)
    return false unless f
    if ext == 'FL'
      @handle.add_rpmmd(f, 'FL', Solv::Repo::REPO_USE_LOADING|Solv::Repo::REPO_EXTEND_SOLVABLES|Solv::Repo::REPO_LOCALPOOL)
    elsif ext == 'DL'
      @handle.add_deltainfoxml(f, Solv::Repo::REPO_USE_LOADING)
    end
    f.close
    writecachedrepo(ext, repodata)
    return true
  end

end

class Repo_susetags < Repo_generic

  def find(what)
    di = @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()
      checksum = dp.lookup_checksum(Solv::SUSETAGS_FILE_CHECKSUM)
      return what, checksum
    end
    return nil, nil
  end

  def load(pool)
    return true if super(pool)
    print "susetags repo '#{@name}: "
    f = download("content", false, nil, nil)
    if !f
      puts "no content file, skipped"
      @handle.free(true)
      @handle = nil
      return false
    end
    @cookie = calc_cookie_fp(f)
    if usecachedrepo(nil, true)
      puts "cached"
      f.close
      return true
    end
    @handle.add_content(f, 0)
    f.close
    puts "fetching"
    defvendorid = @handle.meta.lookup_id(Solv::SUSETAGS_DEFAULTVENDOR)
    descrdir = @handle.meta.lookup_str(Solv::SUSETAGS_DESCRDIR)
    descrdir = "suse/setup/descr" unless descrdir
    (filename, filechksum) = find('packages.gz')
    (filename, filechksum) = find('packages') unless filename
    if filename
      f = download("#{descrdir}/#{filename}", true, filechksum, true)
      if f
	@handle.add_susetags(f, defvendorid, nil, Solv::Repo::REPO_NO_INTERNALIZE|Solv::Repo::SUSETAGS_RECORD_SHARES)
	f.close
	(filename, filechksum) = find('packages.en.gz')
	(filename, filechksum) = find('packages.en') unless filename
	if filename
	  f = download("#{descrdir}/#{filename}", true, filechksum, true)
	  if f
	    @handle.add_susetags(f, defvendorid, nil, Solv::Repo::REPO_NO_INTERNALIZE|Solv::Repo::REPO_REUSE_REPODATA|Solv::Repo::REPO_EXTEND_SOLVABLES)
	    f.close
	  end
	end
	@handle.internalize()
      end
    end
    add_exts()
    writecachedrepo(nil)
    @handle.create_stubs()
    return true
  end

  def add_ext(repodata, what, ext)
    (filename, filechksum) = find(what)
    h = repodata.new_handle()
    repodata.set_str(h, Solv::SUSETAGS_FILE_NAME, filename)
    repodata.set_checksum(h, Solv::SUSETAGS_FILE_CHECKSUM, filechksum)
    add_ext_keys(ext, repodata, h)
    repodata.add_flexarray(Solv::SOLVID_META, Solv::REPOSITORY_EXTERNAL, h)
  end

  def add_exts
    repodata = @handle.add_repodata(0)
    di = @handle.Dataiterator_meta(Solv::SUSETAGS_FILE_NAME, nil, 0)
    di.prepend_keyname(Solv::SUSETAGS_FILE)
    for d in di
      filename = d.str
      next unless filename && filename =~ /^packages\.(..)(?:\..*)$/
      next if $1 == 'en' || $1 == 'gz'
      add_ext(repodata, filename, $1)
    end
    repodata.internalize()
  end

  def load_ext(repodata)
    filename = repodata.lookup_str(Solv::SOLVID_META, Solv::SUSETAGS_FILE_NAME)
    ext = filename[9,2]
    print "[#{@name}:#{ext}: "
    STDOUT.flush
    if usecachedrepo(ext)
      puts "cached]\n"
      return true
    end
    puts "fetching]\n"
    defvendorid = @handle.meta.lookup_id(Solv::SUSETAGS_DEFAULTVENDOR)
    descrdir = @handle.meta.lookup_str(Solv::SUSETAGS_DESCRDIR)
    descrdir = "suse/setup/descr" unless descrdir
    filechksum = repodata.lookup_checksum(Solv::SOLVID_META, Solv::SUSETAGS_FILE_CHECKSUM)
    f = download("#{descrdir}/#{filename}", true, filechksum)
    return false unless f
    flags = Solv::Repo::REPO_USE_LOADING|Solv::Repo::REPO_EXTEND_SOLVABLES
    flags |= Solv::Repo::REPO_LOCALPOOL if ext != 'DL'
    @handle.add_susetags(f, defvendorid, ext, flags)
    f.close
    writecachedrepo(ext, repodata)
    return true
  end

  def packagespath()
    datadir = @handle.meta.lookup_str(Solv::SUSETAGS_DATADIR)
    datadir = "suse" unless datadir
    return datadir + '/'
  end
end

class Repo_unknown < Repo_generic
  def load(pool)
    puts "unsupported repo '#{@name}: skipped"
    return false
  end
end

class Repo_system < Repo_generic
  def load(pool)
    @handle = pool.add_repo(@name)
    @handle.appdata = self
    pool.installed = @handle
    print "rpm database: "
    @cookie = calc_cookie_file("/var/lib/rpm/Packages")
    if usecachedrepo(nil)
      puts "cached"
      return true
    end
    puts "reading"
    if @handle.respond_to? :add_products
      @handle.add_products("/etc/products.d", Solv::Repo::REPO_NO_INTERNALIZE)
    end
    f = Solv::xfopen(cachepath())
    @handle.add_rpmdb_reffp(f, Solv::Repo::REPO_REUSE_REPODATA)
    f.close if f
    writecachedrepo(nil)
    return true
  end
end

args = ARGV
cmd = args.shift

cmdabbrev = { 'ls' => 'list', 'in' => 'install', 'rm' => 'erase',
              've' => 'verify', 'se' => 'search' }
cmd = cmdabbrev[cmd] if cmdabbrev.has_key?(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,
}

repos = []
reposdirs = []
if FileTest.directory?('/etc/zypp/repos.d')
  reposdirs = [ '/etc/zypp/repos.d' ]
else
  reposdirs = [ '/etc/yum/repos.d' ]
end
for reposdir in reposdirs do
  next unless FileTest.directory?(reposdir)
  for reponame in Dir["#{reposdir}/*.repo"].sort do
    cfg = IniFile.load(reponame)
    cfg.each_section do |ali|
      repoattr = { 'alias' => ali, 'enabled' => 0, 'priority' => 99, 'autorefresh' => 1, 'type' => 'rpm-md', 'metadata_expire' => 900}
      repoattr.update(cfg[ali])
      if repoattr['type'] == 'rpm-md'
	repo = Repo_rpmmd.new(ali, 'repomd', repoattr)
      elsif repoattr['type'] == 'yast2'
	repo = Repo_susetags.new(ali, 'susetags', repoattr)
      else
	repo = Repo_unknown.new(ali, 'unknown', repoattr)
      end
      repos.push(repo)
    end
  end
end

pool = Solv::Pool.new()
pool.setarch()

pool.set_loadcallback { |repodata|
  repo = repodata.repo.appdata
  repo ? repo.load_ext(repodata) : false
}

sysrepo = Repo_system.new('@System', 'system')
sysrepo.load(pool)
for repo in repos
  repo.load(pool) if repo.enabled?
end

if cmd == 'search'
  pool.createwhatprovides()
  sel = pool.Selection
  for di in pool.Dataiterator(Solv::SOLVABLE_NAME, args[0], Solv::Dataiterator::SEARCH_SUBSTRING | Solv::Dataiterator::SEARCH_NOCASE)
    sel.add_raw(Solv::Job::SOLVER_SOLVABLE, di.solvid)
  end
  for s in sel.solvables
    puts "- #{s.str} [#{s.repo.name}]: #{s.lookup_str(Solv::SOLVABLE_SUMMARY)}"
  end
  exit
end

abort("unknown command '#{cmd}'\n") unless cmdactionmap.has_key?(cmd)

addedprovides = pool.addfileprovides_queue()
if !addedprovides.empty?
  sysrepo.updateaddedprovides(addedprovides)
  for repo in repos
    repo.updateaddedprovides(addedprovides)
  end
end
pool.createwhatprovides()

jobs = []
for arg in args
  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 arg =~ /^\//
    flags |= Solv::Selection::SELECTION_FILELIST
    flags |= Solv::Selection::SELECTION_INSTALLED_ONLY if cmd == 'erase'
  end
  sel = pool.select(arg, flags)
  if sel.isempty?
    sel = pool.select(arg, flags |  Solv::Selection::SELECTION_NOCASE)
    puts "[ignoring case for '#{arg}']" unless sel.isempty?
  end
  puts "[using file list match for '#{arg}']" if sel.flags & Solv::Selection::SELECTION_FILELIST != 0
  puts "[using capability match for '#{arg}']" if sel.flags & Solv::Selection::SELECTION_PROVIDES != 0
  jobs += sel.jobs(cmdactionmap[cmd])
end

if jobs.empty? && (cmd == 'up' || cmd == 'dup' || cmd == 'verify')
  sel = pool.Selection_all()
  jobs += sel.jobs(cmdactionmap[cmd])
end

abort("no package matched.") if jobs.empty?

if cmd == 'list' || cmd == 'info'
  for job in jobs
    for s in job.solvables()
      if cmd == 'info'
	puts "Name:        #{s.str}"
	puts "Repo:        #{s.repo.name}"
	puts "Summary:     #{s.lookup_str(Solv::SOLVABLE_SUMMARY)}"
	str = s.lookup_str(Solv::SOLVABLE_URL)
	puts "Url:         #{str}" if str
	str = s.lookup_str(Solv::SOLVABLE_LICENSE)
	puts "License:     #{str}" if str
	puts "Description:\n#{s.lookup_str(Solv::SOLVABLE_DESCRIPTION)}"
	puts
      else
	puts "  - #{s.str} [#{s.repo.name}]"
	puts "    #{s.lookup_str(Solv::SOLVABLE_SUMMARY)}"
      end
    end
  end
  exit
end

for job in jobs
  job.how ^= Solv::Job::SOLVER_UPDATE ^ Solv::Job::SOLVER_INSTALL if cmd == 'up' and job.isemptyupdate?
end

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

while true
  problems = solver.solve(jobs)
  break if problems.empty?
  for problem in problems
    puts "Problem #{problem.id}/#{problems.count}:"
    puts problem
    solutions = problem.solutions
    for solution in solutions
      puts "  Solution #{solution.id}:"
      elements = solution.elements(true)
      for element in elements
	puts "  - #{element.str}"
      end
      puts
    end
    sol = nil
    while true
      print "Please choose a solution: "
      STDOUT.flush
      sol = STDIN.gets.strip
      break if sol == 's' || sol == 'q'
      break if sol =~ /^\d+$/ && sol.to_i >= 1 && sol.to_i <= solutions.length
    end
    next if sol == 's'
    abort if sol == 'q'
    solution = solutions[sol.to_i - 1]
    for element in solution.elements
      newjob = element.Job()
      if element.type == Solv::Solver::SOLVER_SOLUTION_JOB
	jobs[element.jobidx] = newjob
      else
	jobs.push(newjob) if newjob && !jobs.include?(newjob)
      end
    end
  end
end

trans = solver.transaction
solver = nil
if trans.isempty?
  puts "Nothing to do."
  exit
end

puts "\nTransaction summary:\n"
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
    puts "#{cl.count} erased packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_INSTALL
    puts "#{cl.count} installed packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_REINSTALLED
    puts "#{cl.count} reinstalled packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_DOWNGRADED
    puts "#{cl.count} downgraded packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_CHANGED
    puts "#{cl.count} changed packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_UPGRADED
    puts "#{cl.count} upgraded packages:"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_VENDORCHANGE
    puts "#{cl.count} vendor changes from '#{cl.fromstr}' to '#{cl.tostr}':"
  elsif cl.type == Solv::Transaction::SOLVER_TRANSACTION_ARCHCHANGE
    puts "#{cl.count} arch changes from '#{cl.fromstr}' to '#{cl.tostr}':"
  else
    next
  end
  for p in cl.solvables
    if cl.type == Solv::Transaction::SOLVER_TRANSACTION_UPGRADED || cl.type == Solv::Transaction::SOLVER_TRANSACTION_DOWNGRADED
      puts "  - #{p.str} -> #{trans.othersolvable(p).str}"
    else
      puts "  - #{p.str}"
    end
  end
  puts
end
puts "install size change: #{trans.calc_installsizechange()} K\n\n"

while true
  print("OK to continue (y/n)? ")
  STDOUT.flush
  yn = STDIN.gets.strip
  break if yn == 'y'
  abort if yn == 'n' || yn == 'q'
end

newpkgs = trans.newsolvables()
newpkgsfp = {}
if !newpkgs.empty?
  downloadsize = 0
  for p in newpkgs
    downloadsize += p.lookup_num(Solv::SOLVABLE_DOWNLOADSIZE)
  end
  puts "Downloading #{newpkgs.length} packages, #{downloadsize / 1024} K"
  for p in newpkgs
    repo = p.repo.appdata
    location, medianr = p.lookup_location()
    next unless location
    location = repo.packagespath + location
    chksum = p.lookup_checksum(Solv::SOLVABLE_CHECKSUM)
    f = repo.download(location, false, chksum)
    abort("\n#{@name}: #{location} not found in repository\n") unless f
    newpkgsfp[p.id] = f
    print "."
    STDOUT.flush()
  end
  puts
end

puts "Committing transaction:"
puts
trans.order()
for p in trans.steps
  steptype = trans.steptype(p, Solv::Transaction::SOLVER_TRANSACTION_RPM_ONLY)
  if steptype == Solv::Transaction::SOLVER_TRANSACTION_ERASE
    puts "erase #{p.str}"
    next unless p.lookup_num(Solv::RPM_RPMDBID)
    evr = p.evr.sub(/^[0-9]+:/, '')
    system('rpm', '-e', '--nodeps', '--nodigest', '--nosignature', "#{p.name}-#{evr}.#{p.arch}") || abort("rpm failed: #{$? >> 8}") 
  elsif (steptype == Solv::Transaction::SOLVER_TRANSACTION_INSTALL || steptype == Solv::Transaction::SOLVER_TRANSACTION_MULTIINSTALL)
    puts "install #{p.str}"
    f = newpkgsfp.delete(p.id)
    next unless f
    mode = steptype == Solv::Transaction::SOLVER_TRANSACTION_INSTALL ? '-U' : '-i'
    f.cloexec(0)
    system('rpm', mode, '--force', '--nodeps', '--nodigest', '--nosignature', "/dev/fd/#{f.fileno().to_s}") || abort("rpm failed: #{$? >> 8}")
    f.close
  end
end