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#!/usr/bin/ruby1.8
#
# Copyright © 2010, Antonio Terceiro <terceiro@softwarelivre.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 3 of the License, or
# (at your option) any later version.
# 
# 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 'gem2deb'
require 'gem2deb/gem2tgz'
require 'optparse'

optparse = OptionParser.new do |opts|
  opts.on('-h', '--help', 'show help') do
    puts opts
    exit
  end

  opts.on('-v', '--version', 'show version') do
    puts "gem2tgz version #{Gem2Deb::VERSION}"
    exit
  end
end
optparse.parse!

if ARGV.length != 1 && ARGV.length != 2
  puts optparse
  exit(1)
end

gemfile = ARGV[0]
# Download gem if not available locally
if not File::exists?(gemfile) and gemfile !~ /.gem$/
  puts "#{gemfile} doesn't seem to exist. Let's try to download it with 'gem fetch #{ARGV[0]}'"
  run("gem fetch #{gemfile}")
  gemfile = Dir::glob("#{gemfile}-*.gem")[0]
end

Gem2Deb::Gem2Tgz.convert!(gemfile, ARGV[1] || nil)

__END__
=head1 NAME

gem2tgz - converts Rubygems' .gem file into tarballs

=head1 SYNOPSIS

B<gem2tgz> [I<OPTIONS>] I<GEMNAME> [I<TARBALL>] (to download the gem with I<gem fetch>)

B<gem2tgz> [I<OPTIONS>] I<GEMFILE> [I<TARBALL>] (to use a local .gem file)

=head1 DESCRIPTION

B<gem2tgz> will convert the .gem file I<GEM> into a tarball named I<TARBALL>.
If I<TARBALL> is omitted, B<gem2tgz> will try to guess the filename for the
tarball by taking I<GEM> and replacing '.gem' with '.tar.gz'.

=head1 SEE ALSO

L<B<gem2deb>>(1)

=head1 COPYRIGHT AND AUTHORS

Copyright (c) 2010, Antonio Terceiro <terceiro@softwarelivre.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 3 of the License, or
(at your option) any later version.

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/>.