125 lines
3.7 KiB
Ruby
125 lines
3.7 KiB
Ruby
#
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# Cookbook Name:: build-essential
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# Library:: timing
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#
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# Copyright 2014, Chef Software, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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#
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# This module is used to clean up the recipe DSL and "potentially" execute
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# resources at compile time (depending on the value of an attribute).
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#
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# This library is only for use within the build-essential cookbook. Resources
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# inside the potentially_at_compile_time block will not fire notifications in
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# some situations. This is fixable, but since none of the resources in this
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# cookbook actually use notifications, it is not worth the added technical debt.
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#
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# TL;DR Don't use this DSL method outside of this cookbook.
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#
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module BuildEssential
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module Timing
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#
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# Potentially evaluate the given block at compile time, depending on the
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# value of the +node['build-essential']['compile_time']+ attribute.
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#
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# @example
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# potentially_at_compile_time do
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# package 'apache2'
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# end
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#
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# @param [Proc] block
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# the thing to eval
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#
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def potentially_at_compile_time(&block)
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if compile_time?
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CompileTime.new(self).evaluate(&block)
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else
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instance_eval(&block)
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end
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end
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private
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#
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# Checks if the DSL should be evaluated at compile time.
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#
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# @return [true, false]
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#
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def compile_time?
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check_for_old_attributes!
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!!node['build-essential']['compile_time']
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end
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#
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# Checks for the presence of the "old" attributes.
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#
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# @todo Remove in 2.0.0
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#
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# @return [void]
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#
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def check_for_old_attributes!
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unless node['build_essential'].nil?
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Chef::Log.warn <<-EOH
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node['build_essential'] has been changed to node['build-essential'] to match the
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cookbook name and community standards. I have gracefully converted the attribute
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for you, but this warning and conversion will be removed in the next major
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release of the build-essential cookbook.
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EOH
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node.default['build-essential'] = node['build_essential']
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end
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unless node['build-essential']['compiletime'].nil?
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Chef::Log.warn <<-EOH
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node['build-essential']['compiletime'] has been deprecated. Please use
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node['build-essential']['compile_time'] instead. I have gracefully converted the
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attribute for you, but this warning and conversion will be removed in the next
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major release of the build-essential cookbook.
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EOH
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node.default['build-essential']['compile_time'] = node['build-essential']['compiletime']
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end
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end
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#
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# A class graciously borrowed from Chef Sugar for evaluating a resource at
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# compile time in a block.
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#
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class CompileTime
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def initialize(recipe)
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@recipe = recipe
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end
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def evaluate(&block)
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instance_eval(&block)
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end
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def method_missing(m, *args, &block)
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resource = @recipe.send(m, *args, &block)
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if resource.is_a?(Chef::Resource)
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actions = Array(resource.action)
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resource.action(:nothing)
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actions.each do |action|
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resource.run_action(action)
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end
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end
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resource
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end
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end
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end
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end
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# Include the timing module into the main recipe DSL
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Chef::Recipe.send(:include, BuildEssential::Timing)
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