A Rake Task that makes it stupid-easy to render ERB templates to disk

ERBResolver

=begin
MIT LICENSE
Copyright (C) 2012 Luke Bayes

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
=end

require 'erb'

# DynamicAccessors source file found here: http://gist.github.com/215257
require File.dirname(__FILE__) + '/dynamic_accessors'

module Sprout # :nodoc
  
  # Rake task that makes it stupid-easy to render ERB templates
  # to disk. Just add parameters to the yielded object, and
  # they will be available to your Template.
  #
  #   erb_resolver 'config/SomeFile.xml' do |t|
  #     t.param1 = 'value'
  #     t.other_param = 'other value'
  #     t.another_param = ['a', 'b', 'c']
  #     t.template = 'config/SomeFile.xml.erb' # Optional - will automatically look here...
  #   end
  #
  class ERBResolver < Rake::FileTask
    include DynamicAccessors
    
    # File to create from the rendered
    # ERB template. This value will
    # default to the Task name in order
    # to be consistent with other FileTasks
    attr_accessor :output
    
    # Path to the input ERB template. This
    # value will default to the value of
    # "#{ERBResolver.output}.erb"
    attr_accessor :template
    
    def initialize(name, app) # :nodoc:
      super
    end

    def define
    end

    def prepare
      prepare_prerequisites
    end

    def execute(*args)
      super
      content = nil
      File.open(template, 'r') { |f| content = f.read }
      result = ERB.new(content, nil, '>').result(binding)
      File.open(output, 'w') { |f| f.write(result) }
      puts ">> Created ERB output at: #{output} from: #{template}"
    end

    def self.define_task(args, &block)
      t = super
      if(t.is_a?(ERBResolver))
        yield t if block_given?
        t.define
        t.prepare
      end
      return t
    end
    
    def template
      @template ||= "#{output}.erb"
    end
  
    def output
      @output ||= self.name
    end
    
    protected
    
    def prepare_prerequisites
      prerequisites << file(template)
      CLEAN.add(output)
    end
    
  end
end

def erb_resolver(args, &block)
  Sprout::ERBResolver.define_task(args, &block)
end

This is a lovely Rake task. Would you be willing to clarify copyright and license for this? I would like to adapt it as part of a code base that will be under the MIT license.

Thanks for the kind words.

Done.