NAME

       gem2deb - converts Rubygems' .gem file into Debian package

SYNOPSIS

       gem2deb [OPTIONS] GEMNAME (to download the gem with gem fetch)

       gem2deb [OPTIONS] GEMFILE (to use a local .gem file)

DESCRIPTION

       gem2deb converts the gem into a Debian source package, and then will attempt to build it.
       The process is made of several steps.

       First, gem2deb converts the gem file to a tar.gz archive containing a metadata.yml file
       with the Gem specification. This is equivalent to what gem2tgz does.

       Then, gem2deb unpacks the tar.gz archive and prepares a Debian source package, guess many
       of the defaults from the files included in the archive, or the Gem specification. This is
       equivalent to what dh-make-ruby does.  gem2deb cannot determine all parameters for obvious
       reasons. It is recommended to search for the "FIXME" string in the debian/ directory.  The
       generated Debian source package uses dh_ruby to build the package.

       Finally, gem2deb tries to build the source and binary packages using dpkg-buildpackage.

OPTIONS

       -t, --only-tarball
           Stop after creating the tar.gz archive.

       -s, --only-source-dir
           Stop after preparing the Debian source package directory (do not attempt to build the
           package).

       -S, --only-debian-source
           Only build a Debian source package (do not build binary packages).

       -p PACKAGE, --package PACKAGE
           Specify package name (default: ruby-*).  Passed to dh-make-ruby. See dh-make-ruby(1).

       --ruby-versions VERSIONS
           Ruby versions to build the package for (default: all).  Passed to dh-make-ruby. See
           dh-make-ruby(1).

       -h, --help
           Displays gem2deb usage information.

       -v, --version
           Displays gem2deb version information.

HOW THE .GEM -> .TGZ CONVERSION WORKS

       A gem named mygem-0.1.0.gem is converted in a tarball with (approximately) the following
       steps:

         mkdir mygem-0.1.0
         cd mygem-0.1.0
         tar xfm /absolute/path/to/mygem-0.1.0.gem
         tar xzfm data.tar.gz
         zcat metadata.gz > metadata.yml
         rm -f data.tar.gz metadata.gz
         cd ..
         tar czf mygem-0.1.0.tar.gz mygem-0.1.0
         rm -rf mygem-0.1.0

       The generated tarball has the following properties:

       Files
           It contains all the files the gem contains.

       Metadata
           It contains the gem metadata in a file named ``metadata.yml`` inside the mygem-0.1.0
           directory.

SEE ALSO

       dh_ruby(1)

COPYRIGHT AND AUTHORS

       Copyright (c) 2011, Lucas Nussbaum <lucas@debian.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/>.

                                            2013-11-20                                 GEM2DEB(1)