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== PluginGems ==
Turning your rails plugin into a gem is a simple and straightforward task. This section will cover how to turn your plugin into a gem. It will not cover how to distribute that gem.
Historically rails plugins loaded the plugin's 'init.rb' file. In fact some plugins contain all of their code in that one file. To be compatible with plugins, 'init.rb' was moved to 'rails/init.rb'.
It's common practice to put any developer-centric rake tasks (such as tests, rdoc and gem package tasks) in 'Rakefile'. A rake task that packages the gem might look like this:
*vendor/plugins/yaffle/Rakefile:*
[source, ruby]
----------------------------------------------
PKG_FILES = FileList[
'[a-zA-Z]*',
'generators/**/*',
'lib/**/*',
'rails/**/*',
'tasks/**/*',
'test/**/*'
]
spec = Gem::Specification.new do |s|
s.name = "yaffle"
s.version = "0.0.1"
s.author = "Gleeful Yaffler"
s.email = "yaffle@example.com"
s.homepage = "http://yafflers.example.com/"
s.platform = Gem::Platform::RUBY
s.summary = "Sharing Yaffle Goodness"
s.files = PKG_FILES.to_a
s.require_path = "lib"
s.has_rdoc = false
s.extra_rdoc_files = ["README"]
end
desc 'Turn this plugin into a gem.'
Rake::GemPackageTask.new(spec) do |pkg|
pkg.gem_spec = spec
end
----------------------------------------------
To build and install the gem locally, run the following commands:
----------------------------------------------
cd vendor/plugins/yaffle
rake gem
sudo gem install pkg/yaffle-0.0.1.gem
----------------------------------------------
To test this, create a new rails app, add 'config.gem "yaffle"' to environment.rb and all of your plugin's functionality will be available to you.
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