config/initializers/r2.rb

   1 class R2Template < Tilt::Template
   2   self.default_mime_type = "text/css"
   3
   4   def self.engine_initialized?
   5     defined? ::R2
   6   end
   7
   8   def initialize_engine
   9     require_template_library "r2"
  10   end
  11
  12   def prepare
  13     @output = R2.r2(data)
  14   end
  15
  16   def evaluate(_scope, _locals, &_block)
  17     @output
  18   end
  19 end
  20
  21 Rails.application.config.assets.configure do |env|
  22   env.register_engine ".r2", R2Template
  23 end