version is hard coded so that we can't change the default version in wrap cookbooks

[Wing924]

Those codes are evaluated before wrap cookbooks, so we can't change those attributes by overwrite node['rabbitmq']['version'].

default['rabbitmq']['deb_package'] = "rabbitmq-server_#{node['rabbitmq']['version']}-1_all.deb"
default['rabbitmq']['deb_package_url'] = "https://www.rabbitmq.com/releases/rabbitmq-server/v#{node['rabbitmq']['version']}/"

case node['platform_family']
when 'rhel', 'fedora'
  default['rabbitmq']['rpm_package'] = if node['platform_version'].to_i > 6
                                         "rabbitmq-server-#{node['rabbitmq']['version']}-1.el7.noarch.rpm"
                                       else
                                         "rabbitmq-server-#{node['rabbitmq']['version']}-1.el6.noarch.rpm"
                                       end
when 'suse'
  default['rabbitmq']['rpm_package'] = "rabbitmq-server-#{node['rabbitmq']['version']}-1.suse.noarch.rpm"
end

default['rabbitmq']['rpm_package_url'] = "https://www.rabbitmq.com/releases/rabbitmq-server/v#{node['rabbitmq']['version']}/"

Solutions:

Per suggestion from @yardinicwaller:

Do URL string interpolation in a recipe, while still allowing that to be overridden by an attribute if defined. It would look something like this:

attributes/default.rb:

default['rabbitmq']['version'] = '3.6.12'
default['rabbitmq']['deb_package'] = nil # override me if you have a local mirror

recipes/default.rb:

default_deb_package = "https://[base URL]/v#{node['rabbitmq']['version']}/"
deb_package = node['rabbitmq']['deb_package'] || default_deb_package
remote_file "#{Chef::Config[:file_cache_path]}/#{deb_package}" do
  source deb_package

[michaelklishin]

@Wing924 feel free to look into a pull request that would make the change.