Class: Nanoc::Core::OutdatednessRules::AttributesModified

Inherits:
Nanoc::Core::OutdatednessRule show all
Includes:
ContractsSupport
Defined in:
lib/nanoc/core/outdatedness_rules/attributes_modified.rb

Instance Method Summary collapse

Methods included from ContractsSupport

enabled?, included, setup_once, warn_about_performance

Methods inherited from Nanoc::Core::OutdatednessRule

affected_props, affects_props, #call, #inspect

Instance Method Details

#apply(obj, outdatedness_checker) ⇒ Object 



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# File 'lib/nanoc/core/outdatedness_rules/attributes_modified.rb', line 12

def apply(obj, outdatedness_checker)
  case obj
  when Nanoc::Core::ItemRep
    apply(obj.item, outdatedness_checker)
  when Nanoc::Core::Item, Nanoc::Core::Layout, Nanoc::Core::Configuration
    if outdatedness_checker.checksum_store[obj] == outdatedness_checker.checksums.checksum_for(obj)
      return nil
    end

    old_checksums = outdatedness_checker.checksum_store.attributes_checksum_for(obj)
    unless old_checksums
      return Nanoc::Core::OutdatednessReasons::AttributesModified.new(true)
    end

    new_checksums = outdatedness_checker.checksums.attributes_checksum_for(obj)

    attributes = Set.new(old_checksums.keys) + Set.new(new_checksums.keys)
    changed_attributes = attributes.reject { |a| old_checksums[a] == new_checksums[a] }

    if changed_attributes.any?
      Nanoc::Core::OutdatednessReasons::AttributesModified.new(changed_attributes)
    end
  else
    raise ArgumentError
  end
end