require_relative '../model/cloudfile' require_relative '../model/event' module Convection module Control ## # Control tour Clouds ## class Cloud def configure(cloudfile) @cloudfile = Model::Cloudfile.new(cloudfile) end # @see Convection::Model::Cloudfile#stacks def stacks @cloudfile.stacks end def stack_groups @cloudfile.stack_groups end def filter_deck(options = {}, &block) # throw an error if the user specifies both a stack group and list of stacks if options[:stack_group] && options[:stacks] block.call(Model::Event.new(:error, 'Cannot specify --stack-group and --stack-list at the same time', :error)) if block return {} end # throw an error if the user specifies a nonexistent stack groups if options[:stack_group] && !stack_groups.key?(options[:stack_group]) block.call(Model::Event.new(:error, "Unknown stack group: #{options[:stack_group]}", :error)) if block return {} end # throw an error if the user specifies nonexistent stacks if Array(options[:stacks]).any? { |name| !@cloudfile.stacks.key?(name) } bad_stack_names = options[:stacks].reject { |name| @cloudfile.stacks.key?(name) } block.call(Model::Event.new(:error, "Undefined Stack(s) #{bad_stack_names.join(', ')}", :error)) if block return {} end filter = Array(stack_groups[options[:stack_group]] || options[:stacks]) # if no filter is specified, return the entire deck return stacks if filter.empty? filter.reduce({}) do |result, stack_name| result.merge(stack_name => @cloudfile.stacks[stack_name]) end end def converge(to_stack, options = {}, &block) if to_stack && !stacks.include?(to_stack) block.call(Model::Event.new(:error, "Undefined Stack #{ to_stack }", :error)) if block return end filter_deck(options, &block).each_value do |stack| block.call(Model::Event.new(:converge, "Stack #{ stack.name }", :info)) if block stack.apply(&block) if stack.error? block.call(Model::Event.new(:error, "Error converging stack #{ stack.name }", :error), stack.errors) if block break end ## Stop on converge error break unless stack.success? ## Stop here break if !to_stack.nil? && stack.name == to_stack sleep rand @cloudfile.splay || 2 end end def diff(to_stack, options = {}, &block) if to_stack && !stacks.include?(to_stack) block.call(Model::Event.new(:error, "Undefined Stack #{ to_stack }", :error)) if block return end filter_deck(options, &block).each_value do |stack| block.call(Model::Event.new(:compare, "Compare local state of stack #{ stack.name } (#{ stack.cloud_name }) with remote template", :info)) difference = stack.diff if difference.empty? difference << Model::Event.new(:unchanged, "Stack #{ stack.cloud_name } has no changes", :info) end difference.each { |diff| block.call(diff) } break if !to_stack.nil? && stack.name == to_stack sleep rand @cloudfile.splay || 2 end end end end end