[chef-dev] forcing parameter to resource to be elevated at execute phase

[Chao < >]

hi everyone,

i was wondering if variable passed as parameter to resource can be made to be
elevated at execute phase instead of compile phase. I have the following code
example.

ruby_block "Calculate secret" do
  block do
    node.set['secret_message'] = "This is a secret"
  end
end

file "/tmp/test" do
  content "#{node['secret_message']}"
  mode 0644
end

This is a simplified version of the challenge i have, what i want  is for the
file resource to use a variable node['secret_message'] which is computed by 
the
ruby_block resource. but the end result is the file /tmp/test contains nothing
because #{node['secret_message']} being ruby code is elevated before the
ruby_block resource is run.

Does anyone know a solution?  if there is a blog post somewhere let me know.

Thanks