diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/puppet/parser/functions/fqdn_rand_string.rb | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/fqdn_rand_string.rb b/lib/puppet/parser/functions/fqdn_rand_string.rb new file mode 100644 index 0000000..785c9fd --- /dev/null +++ b/lib/puppet/parser/functions/fqdn_rand_string.rb @@ -0,0 +1,34 @@ +Puppet::Parser::Functions::newfunction( + :fqdn_rand_string, + :arity => -2, + :type => :rvalue, + :doc => "Usage: `fqdn_rand_string(LENGTH, [CHARSET], [SEED])`. LENGTH is + required and must be a positive integer. CHARSET is optional and may be + `undef` or a string. SEED is optional and may be any number or string. + + Generates a random string LENGTH characters long using the character set + provided by CHARSET, combining the `$fqdn` fact and the value of SEED for + repeatable randomness. (That is, each node will get a different random + string from this function, but a given node's result will be the same every + time unless its hostname changes.) Adding a SEED can be useful if you need + more than one unrelated string. CHARSET will default to alphanumeric if + `undef` or an empty string.") do |args| + raise(ArgumentError, "fqdn_rand_string(): wrong number of arguments (0 for 1)") if args.size == 0 + Puppet::Parser::Functions.function('is_integer') + raise(ArgumentError, "fqdn_rand_base64(): first argument must be a positive integer") unless function_is_integer([args[0]]) and args[0].to_i > 0 + raise(ArgumentError, "fqdn_rand_base64(): second argument must be undef or a string") unless args[1].nil? or args[1].is_a? String + + Puppet::Parser::Functions.function('fqdn_rand') + + length = args.shift.to_i + charset = args.shift.to_s.chars.to_a + + charset = (0..9).map { |i| i.to_s } + ('A'..'Z').to_a + ('a'..'z').to_a if charset.empty? + + rand_string = '' + for current in 1..length + rand_string << charset[function_fqdn_rand([charset.size, (args + [current.to_s]).join(':')]).to_i] + end + + rand_string +end |