Class: Nanoc::Core::Checksummer

Inherits:
Object
  • Object
show all
Defined in:
lib/nanoc/core/checksummer.rb

Overview

Creates checksums for given objects.

A checksum is a string, such as “mL+TaqNsEeiPkWloPgCtAofT1yg=”, that is used to determine whether a piece of data has changed.

Defined Under Namespace

Classes: ArrayUpdateBehavior, BinaryContentUpdateBehavior, CompactDigest, ContextUpdateBehavior, DataUpdateBehavior, DocumentUpdateBehavior, HashUpdateBehavior, ItemRepUpdateBehavior, NoUpdateBehavior, PathnameUpdateBehavior, RawUpdateBehavior, RescueUpdateBehavior, RuleContextUpdateBehavior, StringUpdateBehavior, ToIToSUpdateBehavior, ToSUpdateBehavior, UnwrapUpdateBehavior, UpdateBehavior, VerboseDigest

Class Method Summary collapse

Class Method Details

.calc(obj, digest_class = CompactDigest) ⇒ String

Returns The digest.

Parameters:

  • obj —

    The object to create a checksum for

Returns:



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# File 'lib/nanoc/core/checksummer.rb', line 42

def calc(obj, digest_class = CompactDigest)
  digest = digest_class.new
  update(obj, digest)
  digest.to_s
end

.calc_for_content_of(obj) ⇒ Object 



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# File 'lib/nanoc/core/checksummer.rb', line 48

def calc_for_content_of(obj)
  obj.content_checksum_data || obj.checksum_data || Nanoc::Core::Checksummer.calc(obj.content)
end

.calc_for_each_attribute_of(obj, digest_class = CompactDigest) ⇒ Object 



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# File 'lib/nanoc/core/checksummer.rb', line 52

def calc_for_each_attribute_of(obj, digest_class = CompactDigest)
  obj.attributes.transform_values do |value|
    Nanoc::Core::Checksummer.calc(value, digest_class)
  end
end

.define_behavior(klass, behavior) ⇒ Object 



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# File 'lib/nanoc/core/checksummer.rb', line 58

def define_behavior(klass, behavior)
  behaviors[klass] = behavior
end