Sha256: d1d42433b6a46a1e0537154ebe33a097f7260484269e60a411e70e9d8decf1b3
Contents?: true
Size: 1.91 KB
Versions: 6
Compression:
Stored size: 1.91 KB
Contents
# encoding: utf-8
module Nanoc
# 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.
class Checksummer
class << self
# @param obj The object to create a checksum for
#
# @return [String] The digest
def calc(obj)
digest = Digest::SHA1.new
update(obj, digest)
digest.base64digest
end
private
def update(obj, digest)
digest.update(obj.class.to_s)
case obj
when String
digest.update(obj)
when Array
obj.each do |el|
digest.update('elem')
update(el, digest)
end
when Hash
obj.each do |key, value|
digest.update('key')
update(key, digest)
digest.update('value')
update(value, digest)
end
when Pathname
filename = obj.to_s
if File.exist?(filename)
stat = File.stat(filename)
digest.update(stat.size.to_s + '-' + stat.mtime.utc.to_s)
else
digest.update('???')
end
when Nanoc::RulesCollection
update(obj.data, digest)
when Nanoc::CodeSnippet
update(obj.data, digest)
when Nanoc::Item, Nanoc::Layout
digest.update('content')
if obj.respond_to?(:binary?) && obj.binary?
update(Pathname.new(obj.raw_filename), digest)
else
update(obj.raw_content, digest)
end
digest.update('attributes')
attributes = obj.attributes.dup
attributes.delete(:file)
update(attributes, digest)
else
data = begin
Marshal.dump(obj)
rescue
obj.inspect
end
digest.update(data)
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems