Hiera::RecursiveLookup

# File lib/hiera/recursive_lookup.rb, line 5
def initialize(scope, extra_data)
  @seen = []
  @scope = scope
  @extra_data = extra_data
end

# File lib/hiera/recursive_lookup.rb, line 21
def current_value
  name = @seen.last

  scope_val = @scope[name]
  if scope_val.nil? || scope_val == :undefined
    @extra_data[name]
  else
    scope_val
  end
end

# File lib/hiera/recursive_lookup.rb, line 11
def lookup(name, &block)
  if @seen.include?(name)
    raise Exception, "Interpolation loop detected in [#{@seen.join(', ')}]"
  end
  @seen.push(name)
  ret = yield(current_value)
  @seen.pop
  ret
end