Mercurial > repos > other > Puppet
view modules/stdlib/lib/puppet/parser/functions/seeded_rand.rb @ 272:c42fb28cff86
Update to a newer Python module
This also pulls in an EPEL module (which we don't use) and a newer
stdlib version.
author | IBBoard <dev@ibboard.co.uk> |
---|---|
date | Fri, 03 Jan 2020 19:56:04 +0000 |
parents | |
children | d9352a684e62 |
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# # seeded_rand.rb # Puppet::Parser::Functions.newfunction( :seeded_rand, :arity => 2, :type => :rvalue, :doc => <<-DOC Usage: `seeded_rand(MAX, SEED)`. MAX must be a positive integer; SEED is any string. Generates a random whole number greater than or equal to 0 and less than MAX, using the value of SEED for repeatable randomness. If SEED starts with "$fqdn:", this is behaves the same as `fqdn_rand`. DOC ) do |args| require 'digest/md5' raise(ArgumentError, 'seeded_rand(): first argument must be a positive integer') unless function_is_integer([args[0]]) && args[0].to_i > 0 raise(ArgumentError, 'seeded_rand(): second argument must be a string') unless args[1].is_a? String max = args[0].to_i seed = Digest::MD5.hexdigest(args[1]).hex Puppet::Util.deterministic_rand(seed, max) end