class Puppet::Pops::Loader::DependencyLoader

DependencyLoader

This loader provides visibility into a set of other loaders. It is used as a child of a ModuleLoader (or other loader) to make its direct dependencies visible for loading from contexts that have access to this dependency loader. Access is typically given to logic that resides inside of the module, but not to those that just depend on the module.

It is instantiated with a name, and with a set of dependency_loaders.

@api private

Attributes

index[R]

An index of module_name to module loader used to speed up lookup of qualified names

Public Instance Methods

find(typed_name) click to toggle source

Finds name in a loader this loader depends on / can see

# File lib/puppet/pops/loader/dependency_loader.rb, line 28
def find(typed_name)
  if typed_name.qualified
    if loader = index()[typed_name.name_parts[0]]
      loader.load_typed(typed_name)
    else
      # no module entered as dependency with name matching first segment of wanted name
      nil
    end
  else
    # a non name-spaced name, have to search since it can be anywhere.
    # (Note: superclass caches the result in this loader as it would have to repeat this search for every
    # lookup otherwise).
    loaded = @dependency_loaders.reduce(nil) do |previous, loader|
      break previous if !previous.nil?
      loader.load_typed(typed_name)
    end
    if loaded
      promote_entry(loaded)
    end
    loaded
  end
end

to_s() click to toggle source

# File lib/puppet/pops/loader/dependency_loader.rb, line 51
def to_s()
  "(DependencyLoader '#{@loader_name}' [" + @dependency_loaders.map {|loader| loader.to_s }.join(' ,') + "])"
end

Public Class Methods

new(parent_loader, name, dependency_loaders) click to toggle source

Creates a DependencyLoader for one parent loader

@param parent_loader [Puppet::Pops::Loader] typically a module loader for the root @param name [String] the name of the dependency-loader (used for debugging and tracing only) @param dependency_loaders [Array<Puppet::Pops::Loader>] array of loaders for modules this module depends on

# File lib/puppet/pops/loader/dependency_loader.rb, line 21
def initialize(parent_loader, name, dependency_loaders)
  super parent_loader, name
  @dependency_loaders = dependency_loaders
end