diff --git a/tarme.rb b/tarme.rb
index 0fb3306..1c0cfab 100755
--- a/tarme.rb
+++ b/tarme.rb
@@ -1,115 +1,119 @@
 #!/usr/bin/env ruby
 #--
 # Copyright (C) 2014-2015 Harald Sitter <sitter@kde.org>
 #
 # 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; either version 2 of
 # the License or (at your option) version 3 or any later version
 # accepted by the membership of KDE e.V. (or its successor approved
 # by the membership of KDE e.V.), which shall act as a proxy
 # defined in Section 14 of version 3 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, see <http://www.gnu.org/licenses/>.
 #++
 
 require 'ostruct'
 require 'optparse'
 
 require_relative 'lib/releaseme'
 
 puts '           !! Make sure to read the wiki :) !!'
 puts '     https://community.kde.org/ReleasingSoftware'
 
 options = OpenStruct.new
 OptionParser.new do |opts|
   opts.banner = 'Usage: tarme.rb [options] PROJECT_NAME'
 
   opts.separator ''
   opts.separator 'Automatic Project Definition via projects.kde.org:'
 
   opts.on('--origin ORIGIN', ReleaseMe::Origin::ALL,
           "Origin (#{ReleaseMe::Origin::ALL.join(' | ')}).",
           '   Used to deduce release branch and localization branches.') do |v|
     options[:origin] = v
   end
 
   opts.on('--version VERSION', 'Version.',
           '   Versions should be kept in numerical format (good: x.x.x).',
           '   Alphanumerical version should be avoided if at all possible' \
             ' (bad: x.x-beta1).') do |v|
     options[:version] = v
   end
 
+  opts.on('--debug', 'Enable debug output.') do |v|
+    ENV['RELEASEME_DEBUG'] = '1'
+  end
+
   opts.separator ''
   opts.separator 'Manual Project Definition:'
 
   opts.on('--from-config', 'Get configuration from projects/ directory.') do |c|
     options[:from_config] = c
   end
 end.parse!
 
 if ARGV.empty?
   warn 'You need to define a PROJECT_NAME'
   exit 1
 end
 
 unless (options.origin || options.from_config) && options.version
   warn 'error, you need to set origin and version'
   warn 'alternatively you can use a configuration file and use the' \
          ' --from-config switch'
   exit 1
 end
 
 project_name = ARGV.pop
 
 release_projects = []
 if options[:from_config].nil?
   release_projects = ReleaseMe::Project.from_xpath(project_name)
   if release_projects.empty?
     warn "The project #{project_name} could not be resolved." \
            ' Please note that you need to provide a concret name or path.'
     exit 1
   end
 
   # FIXME: runtime deps are not checked first
   # e.g. svn, git, xz...
 else
   release_projects << ReleaseMe::Project.from_config(project_name)
 end
 
 release_data_file = File.open('release_data', 'w')
 releases = release_projects.collect do |project|
   project_name = project.identifier
   release = ReleaseMe::Release.new(project, options[:origin], options[:version])
 
   # FIXME: ALL gets() need to have appropriate handling and must be able to
   #        throw exceptions or return false when something goes wrong
   #        possibly a general fork() function would be useful to a) control IO
   #        better b) check the retvalue c) throw exception accordingly
   release.get
   release.archive
 
   # FIXME: present release_data format assumes that everything is git, so we
   # cannot add svn data
   next nil if release.project.vcs.is_a?(ReleaseMe::Svn)
 
   # FIXME: technically we need to track SVN revs for l10n as well...........
   # FIXME FIXME FIXME FIXME: need version
   project = release.project.identifier
   branch = release.project.vcs.branch
   hash = release.project.vcs.hash
   tar = release.archive_.filename
   sha256 = `sha256sum #{tar}`.split(' ')[0] unless tar.nil?
   release_data_file.write("#{project};#{branch};#{hash};#{tar};#{sha256}\n")
   release
 end
 
 # At the end dump help output for all created tarballs.
 releases.compact.each(&:help)