git subrepo clone https://leap.se/git/puppet_stdlib puppet/modules/stdlib

subrepo:
  subdir:   "puppet/modules/stdlib"
  merged:   "7112363"
upstream:
  origin:   "https://leap.se/git/puppet_stdlib"
  branch:   "master"
  commit:   "7112363"
git-subrepo:
  version:  "0.3.0"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "cb2995b"

1 files changed, 45 insertions, 0 deletions

diff --git a/puppet/modules/stdlib/lib/puppet/parser/functions/fqdn_rotate.rb b/puppet/modules/stdlib/lib/puppet/parser/functions/fqdn_rotate.rb
new file mode 100644
index 00000000..7f4d37d0
--- /dev/null
+++ b/puppet/modules/stdlib/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 :