Mercurial > repos > other > Puppet
comparison 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 |
comparison
equal
deleted
inserted
replaced
| 271:c62728474654 | 272:c42fb28cff86 |
|---|---|
| 1 # | |
| 2 # seeded_rand.rb | |
| 3 # | |
| 4 Puppet::Parser::Functions.newfunction( | |
| 5 :seeded_rand, | |
| 6 :arity => 2, | |
| 7 :type => :rvalue, | |
| 8 :doc => <<-DOC | |
| 9 Usage: `seeded_rand(MAX, SEED)`. MAX must be a positive integer; SEED is any string. | |
| 10 | |
| 11 Generates a random whole number greater than or equal to 0 and less | |
| 12 than MAX, using the value of SEED for repeatable randomness. If SEED | |
| 13 starts with "$fqdn:", this is behaves the same as `fqdn_rand`. | |
| 14 DOC | |
| 15 ) do |args| | |
| 16 require 'digest/md5' | |
| 17 | |
| 18 raise(ArgumentError, 'seeded_rand(): first argument must be a positive integer') unless function_is_integer([args[0]]) && args[0].to_i > 0 | |
| 19 raise(ArgumentError, 'seeded_rand(): second argument must be a string') unless args[1].is_a? String | |
| 20 | |
| 21 max = args[0].to_i | |
| 22 seed = Digest::MD5.hexdigest(args[1]).hex | |
| 23 Puppet::Util.deterministic_rand(seed, max) | |
| 24 end |