upgrade to stdlib 4.6.1

[dsa-puppet.git] / 3rdparty / modules / stdlib / lib / puppet / parser / functions / fqdn_rotate.rb

diff --git a/3rdparty/modules/stdlib/lib/puppet/parser/functions/fqdn_rotate.rb b/3rdparty/modules/stdlib/lib/puppet/parser/functions/fqdn_rotate.rb
new file mode 100644 (file)
index 0000000..cf22d36
--- /dev/null
+++ b/3rdparty/modules/stdlib/lib/puppet/parser/functions/fqdn_rotate.rb
@@ -0,0 +1,57 @@
+#
+# 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
+
+    seed = Digest::MD5.hexdigest([lookupvar('::fqdn'),arguments].join(':')).hex
+    # deterministic_rand() was added in Puppet 3.2.0; reimplement if necessary
+    if Puppet::Util.respond_to?(:deterministic_rand)
+      offset = Puppet::Util.deterministic_rand(seed, elements).to_i
+    else
+      if defined?(Random) == 'constant' && Random.class == Class
+        offset = Random.new(seed).rand(elements)
+      else
+        srand(seed)
+        offset = rand(elements)
+        srand()
+      end
+    end
+    offset.times {
+       result.push result.shift
+    }
+
+    result = string ? result.join : result
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :