1 Puppet::Parser::Functions.newfunction(
7 Generates a random alphanumeric string. Combining the `$fqdn` fact and an
8 optional seed for repeatable randomness.
10 Optionally, you can specify a character set for the function (defaults to alphanumeric).
13 * An integer, specifying the length of the resulting string.
14 * Optionally, a string specifying the character set.
15 * Optionally, a string specifying the seed for repeatable randomness.
19 @example Example Usage:
21 fqdn_rand_string(10, 'ABCDEF!@$%^')
22 fqdn_rand_string(10, '', 'custom seed')
25 raise(ArgumentError, 'fqdn_rand_string(): wrong number of arguments (0 for 1)') if args.empty?
26 Puppet::Parser::Functions.function('is_integer')
27 raise(ArgumentError, 'fqdn_rand_string(): first argument must be a positive integer') unless function_is_integer([args[0]]) && args[0].to_i > 0
28 raise(ArgumentError, 'fqdn_rand_string(): second argument must be undef or a string') unless args[1].nil? || args[1].is_a?(String)
30 Puppet::Parser::Functions.function('fqdn_rand')
32 length = args.shift.to_i
33 charset = args.shift.to_s.chars.to_a
35 charset = (0..9).map { |i| i.to_s } + ('A'..'Z').to_a + ('a'..'z').to_a if charset.empty?
38 for current in 1..length # rubocop:disable Style/For : An each loop would not work correctly in this circumstance
39 rand_string << charset[function_fqdn_rand([charset.size, (args + [current.to_s]).join(':')]).to_i]