Itamaeでなんかいちどだけexecuteを実行するための適当なプラグイン

execute_once.rb

require 'fileutils'
require 'digest/md5'
require "itamae/resource/base"
require "itamae/logger"
module Itamae
    module Plugin
        module Resource
            class ExecuteOnce < Itamae::Resource::Base
                define_attribute :action, default: :execute_once
                define_attribute :cmd, type: String, default_name: true
                def action_execute_once( options )
                    history_done = '/var/itamae/done/execute_once/'
                    test_remote = run_command( "test -d #{history_done}", error: false )
                    if test_remote.exit_status != 0
                        run_command( "mkdir -p #{history_done}" )
                    end
                    cmd_line = attributes.cmd
                    hashed = Digest::MD5.hexdigest( cmd_line )
                    hashed_dir = history_done + hashed
                    test_remote = run_command( "test -d #{hashed_dir}", error: false )
                    if test_remote.exit_status == 0
                        Itamae.logger.info "execute_once SKIP[#{cmd_line}]"
                        return
                    end
                    result = run_command( cmd_line, error: false )
                    if result.exit_status != 0
                        raise "execute_once caused error: #{run_command}"
                    else
                        run_command( "mkdir -p #{hashed_dir}", error: false )
                        Itamae.logger.info "execute_once done[#{cmd_line}]"
                    end
                end
            end
        end
    end
end