Mercurial > repos > other > Puppet
annotate modules/stdlib/lib/puppet/parser/functions/seeded_rand.rb @ 275:d9352a684e62
Mass update of modules to remove deprecation warnings
author | IBBoard <dev@ibboard.co.uk> |
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date | Sun, 26 Jan 2020 11:36:07 +0000 |
parents | c42fb28cff86 |
children | 4a2ee7e3b110 |
rev | line source |
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272 | 1 # |
2 # seeded_rand.rb | |
3 # | |
4 Puppet::Parser::Functions.newfunction( | |
5 :seeded_rand, | |
6 :arity => 2, | |
7 :type => :rvalue, | |
8 :doc => <<-DOC | |
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9 @summary |
d9352a684e62
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parents:
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10 Generates a random whole number greater than or equal to 0 and less than MAX, using the value of SEED for repeatable randomness. |
d9352a684e62
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IBBoard <dev@ibboard.co.uk>
parents:
272
diff
changeset
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11 |
d9352a684e62
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IBBoard <dev@ibboard.co.uk>
parents:
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12 @return |
d9352a684e62
Mass update of modules to remove deprecation warnings
IBBoard <dev@ibboard.co.uk>
parents:
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13 random number greater than or equal to 0 and less than MAX |
d9352a684e62
Mass update of modules to remove deprecation warnings
IBBoard <dev@ibboard.co.uk>
parents:
272
diff
changeset
|
14 |
d9352a684e62
Mass update of modules to remove deprecation warnings
IBBoard <dev@ibboard.co.uk>
parents:
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15 @example **Usage:** |
d9352a684e62
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16 seeded_rand(MAX, SEED). |
d9352a684e62
Mass update of modules to remove deprecation warnings
IBBoard <dev@ibboard.co.uk>
parents:
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changeset
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17 MAX must be a positive integer; SEED is any string. |
272 | 18 |
19 Generates a random whole number greater than or equal to 0 and less | |
20 than MAX, using the value of SEED for repeatable randomness. If SEED | |
21 starts with "$fqdn:", this is behaves the same as `fqdn_rand`. | |
22 DOC | |
23 ) do |args| | |
24 require 'digest/md5' | |
25 | |
26 raise(ArgumentError, 'seeded_rand(): first argument must be a positive integer') unless function_is_integer([args[0]]) && args[0].to_i > 0 | |
27 raise(ArgumentError, 'seeded_rand(): second argument must be a string') unless args[1].is_a? String | |
28 | |
29 max = args[0].to_i | |
30 seed = Digest::MD5.hexdigest(args[1]).hex | |
31 Puppet::Util.deterministic_rand(seed, max) | |
32 end |