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

affects_attributes?, affects_compiled_content?, affects_path?, affects_props, affects_raw_content?, #call, #inspect

Instance Method Details

#apply(obj, basic_outdatedness_checker) ⇒ Object 



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# File 'lib/nanoc/core/outdatedness_rules/attributes_modified.rb', line 18

def apply(obj, basic_outdatedness_checker)
  boc = basic_outdatedness_checker

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

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

    new_checksums = boc.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] }

    unless changed_attributes.empty?
      Nanoc::Core::OutdatednessReasons::AttributesModified
        .new(changed_attributes)
    end
  else
    raise ArgumentError
  end
end