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A Rake Task that makes it stupid-easy to render ERB templates to disk
##################################
# 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.
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
@obscurerichard

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.

@lukebayes
Owner

Thanks for the kind words.

Done.

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