Puppet

unless loaded_classes.include?(klass)
  begin
    if scope.respond_to?(:function_include)
      scope.function_include(klass)
    else
      scope.real.function_include(klass)
    end
    temp_answer = scope[varname]
    Hiera.debug("Found data in class #{klass}")
  rescue
  end
else
  temp_answer = scope[varname]
end

While working with hiera’s puppet backend, I made a syntax error in one of my data classes, such that when calling a hiera function it would fail to load. Due to the above code, however, there was no indication that such an error was occurring. The only hiera messages when I enabled debug in the puppet master was the following:

Could not find data item classes in any Hiera data file and no default supplied at /etc/puppet/manifests/site.pp

Perhaps something like this would be useful. I added it temporarily to help me find the error.

rescue Exception=>e
  Hiera.debug(e.message)
  Hiera.debug(e.backtrace.inspect)
end