1 files changed, 33 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/flatten.rb b/lib/puppet/parser/functions/flatten.rb
new file mode 100644
index 0000000..781da78
--- /dev/null
+++ b/lib/puppet/parser/functions/flatten.rb
@@ -0,0 +1,33 @@
+#
+# flatten.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:flatten, :type => :rvalue, :doc => <<-EOS
+This function flattens any deeply nested arrays and returns a single flat array
+as a result.
+
+*Examples:*
+
+    flatten(['a', ['b', ['c']]])
+
+Would return: ['a','b','c']
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "flatten(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'flatten(): Requires array to work with')
+    end
+
+    result = array.flatten
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :