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# File 'lib/nanoc/base/services/outdatedness_rules/attributes_modified.rb', line 10
def apply(obj, outdatedness_checker)
case obj
when Nanoc::Int::ItemRep
apply(obj.item, outdatedness_checker)
when Nanoc::Int::Item, Nanoc::Int::Layout, Nanoc::Int::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::Int::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::Int::OutdatednessReasons::AttributesModified.new(changed_attributes)
end
else
raise ArgumentError
end
end
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