Gemfile

source 'https://rubygems.org'

#main gemspec
gemspec :name => 'nmatrix'

#plugin gemspecs
Dir['nmatrix-*.gemspec'].each do |gemspec_file|
  plugin_name = gemspec_file.match(/(nmatrix-.*)\.gemspec/)[1]
  gemspec(:name => plugin_name, :development_group => :plugin)
end