Gemfile
source "http://rubygems.org"
gemspec
gem 'gtk3'
gem 'gtksourceview3'
#gem 'gstreamer' # only for video() primitive, do not work well on linux
#gem 'clutter-gtk' # "
#gem 'clutter-gstreamer' # "
#gem 'rspec', :require => false, :group => :test
#gem 'simplecov', :require => false, :group => :test