diff options
author | Micah <micah@leap.se> | 2016-05-24 10:19:33 -0400 |
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committer | Micah <micah@leap.se> | 2016-05-24 10:19:33 -0400 |
commit | 1da5dc55ee48fcd437f5b5df00a5b2f3991ec9f1 (patch) | |
tree | 1794e812d83facd93b3007c42632c63ddf1eb2fc /lib/puppet/parser/functions/fqdn_rotate.rb |
Squashed 'puppet/modules/stdlib/' content from commit 7112363
git-subtree-dir: puppet/modules/stdlib
git-subtree-split: 71123634744b9fe2ec7d6a3e38e9789fd84801e3
Diffstat (limited to 'lib/puppet/parser/functions/fqdn_rotate.rb')
-rw-r--r-- | lib/puppet/parser/functions/fqdn_rotate.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/fqdn_rotate.rb b/lib/puppet/parser/functions/fqdn_rotate.rb new file mode 100644 index 00000000..7f4d37d0 --- /dev/null +++ b/lib/puppet/parser/functions/fqdn_rotate.rb @@ -0,0 +1,45 @@ +# +# fqdn_rotate.rb +# + +module Puppet::Parser::Functions + newfunction(:fqdn_rotate, :type => :rvalue, :doc => <<-EOS +Rotates an array a random number of times based on a nodes fqdn. + EOS + ) do |arguments| + + raise(Puppet::ParseError, "fqdn_rotate(): Wrong number of arguments " + + "given (#{arguments.size} for 1)") if arguments.size < 1 + + value = arguments[0] + require 'digest/md5' + + unless value.is_a?(Array) || value.is_a?(String) + raise(Puppet::ParseError, 'fqdn_rotate(): Requires either ' + + 'array or string to work with') + end + + result = value.clone + + string = value.is_a?(String) ? true : false + + # Check whether it makes sense to rotate ... + return result if result.size <= 1 + + # We turn any string value into an array to be able to rotate ... + result = string ? result.split('') : result + + elements = result.size + + srand(Digest::MD5.hexdigest([lookupvar('::fqdn'),arguments].join(':')).hex) + rand(elements).times { + result.push result.shift + } + + result = string ? result.join : result + + return result + end +end + +# vim: set ts=2 sw=2 et : |