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namespace :doc do
  def gem_path(gem_name)
    Bundler.load.specs.find{|s| s.name == gem_name}.full_gem_path
  end

  desc "Generate documentation for the application. Set custom template with TEMPLATE=/path/to/rdoc/template.rb or title with TITLE=\"Custom Title\""
  Rake::RDocTask.new("app") { |rdoc|
    rdoc.rdoc_dir = 'doc/app'
    rdoc.template = ENV['template'] if ENV['template']
    rdoc.title = ENV['title'] || "Rails Application Documentation"
    rdoc.options << '--line-numbers' << '--inline-source'
    rdoc.options << '--charset' << 'utf-8'
    rdoc.rdoc_files.include('doc/README_FOR_APP')
    rdoc.rdoc_files.include('app/**/*.rb')
    rdoc.rdoc_files.include('lib/**/*.rb')
  }

  desc 'Generate documentation for the Rails framework.'
  Rake::RDocTask.new("rails") { |rdoc|
    rdoc.rdoc_dir = 'doc/api'
    rdoc.template = "#{ENV['template']}.rb" if ENV['template']
    rdoc.title = "Rails Framework Documentation"
    rdoc.options << '--line-numbers' << '--inline-source'
    rdoc.rdoc_files.include('README')

    %w(README CHANGELOG MIT-LICENSE lib/action_mailer/base.rb).each do |file|
      rdoc.rdoc_files.include("#{gem_path('actionmailer')}/#{file}")
    end

    %w(README CHANGELOG MIT-LICENSE lib/action_controller/**/*.rb lib/action_view/**/*.rb).each do |file|
      rdoc.rdoc_files.include("#{gem_path('actionpack')}/#{file}")
    end

    %w(README CHANGELOG MIT-LICENSE lib/active_model/**/*.rb).each do |file|
      rdoc.rdoc_files.include("#{gem_path('activemodel')}/#{file}")
    end

    %w(README CHANGELOG lib/active_record/**/*.rb).each do |file|
      rdoc.rdoc_files.include("#{gem_path('activerecord')}/#{file}")
    end

    %w(README CHANGELOG lib/active_resource.rb lib/active_resource/*).each do |file|
      rdoc.rdoc_files.include("#{gem_path('activeresource')}/#{file}")
    end

    %w(README CHANGELOG lib/active_support/**/*.rb).each do |file|
      rdoc.rdoc_files.include("#{gem_path('activesupport')}/#{file}")
    end

    %w(README CHANGELOG lib/{*.rb,commands/*.rb,generators/*.rb}).each do |file|
      rdoc.rdoc_files.include("#{gem_path('railties')}/#{file}")
    end
  }

  plugins = FileList['vendor/plugins/**'].collect { |plugin| File.basename(plugin) }

  desc "Generate documentation for all installed plugins"
  task :plugins => plugins.collect { |plugin| "doc:plugins:#{plugin}" }

  desc "Remove plugin documentation"
  task :clobber_plugins do
    rm_rf 'doc/plugins' rescue nil
  end

  desc "Generate Rails guides"
  task :guides do
    require File.join(RAILTIES_PATH, "guides/rails_guides")
    RailsGuides::Generator.new(Rails.root.join("doc/guides")).generate
  end

  namespace :plugins do
    # Define doc tasks for each plugin
    plugins.each do |plugin|
      desc "Generate documentation for the #{plugin} plugin"
      task(plugin => :environment) do
        plugin_base = "vendor/plugins/#{plugin}"
        options = []
        files = Rake::FileList.new
        options << "-o doc/plugins/#{plugin}"
        options << "--title '#{plugin.titlecase} Plugin Documentation'"
        options << '--line-numbers' << '--inline-source'
        options << '--charset' << 'utf-8'
        options << '-T html'

        files.include("#{plugin_base}/lib/**/*.rb")
        if File.exist?("#{plugin_base}/README")
          files.include("#{plugin_base}/README")
          options << "--main '#{plugin_base}/README'"
        end
        files.include("#{plugin_base}/CHANGELOG") if File.exist?("#{plugin_base}/CHANGELOG")

        options << files.to_s

        sh %(rdoc #{options * ' '})
      end
    end
  end
end
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