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files >> //proc/self/root/var/lib/puppet/lib/puppet/parser/functions/fqdn_rotate.rb
# # fqdn_rotate.rb # module Puppet::Parser::Functions newfunction(:fqdn_rotate, :type => :rvalue, :doc => <<-EOS Rotates an array a random number of times based on a nodes fqdn. EOS ) do |arguments| raise(Puppet::ParseError, "fqdn_rotate(): Wrong number of arguments " + "given (#{arguments.size} for 1)") if arguments.size < 1 value = arguments[0] klass = value.class require 'digest/md5' unless [Array, String].include?(klass) raise(Puppet::ParseError, 'fqdn_rotate(): Requires either ' + 'array or string to work with') end result = value.clone string = value.is_a?(String) ? true : false # Check whether it makes sense to rotate ... return result if result.size <= 1 # We turn any string value into an array to be able to rotate ... result = string ? result.split('') : result elements = result.size srand(Digest::MD5.hexdigest([lookupvar('::fqdn'),arguments].join(':')).hex) rand(elements).times { result.push result.shift } result = string ? result.join : result return result end end # vim: set ts=2 sw=2 et :
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