1 files changed, 47 insertions, 0 deletions
diff --git a/puppet/lib/puppet/parser/functions/sorted_json.rb b/puppet/lib/puppet/parser/functions/sorted_json.rb
new file mode 100644
index 00000000..605da00e
--- /dev/null
+++ b/puppet/lib/puppet/parser/functions/sorted_json.rb
@@ -0,0 +1,47 @@
+#
+# Written by Gavin Mogan, from https://gist.github.com/halkeye/2287885
+# Put in the public domain by the author.
+#
+
+require 'json'
+
+def sorted_json(obj)
+  case obj
+    when String, Fixnum, Float, TrueClass, FalseClass, NilClass
+      return obj.to_json
+    when Array
+      arrayRet = []
+      obj.each do |a|
+        arrayRet.push(sorted_json(a))
+      end
+      return "[" << arrayRet.join(',') << "]";
+    when Hash
+      ret = []
+      obj.keys.sort.each do |k|
+        ret.push(k.to_json << ":" << sorted_json(obj[k]))
+      end
+      return "{" << ret.join(",") << "}";
+    else
+      raise Exception("Unable to handle object of type <%s>" % obj.class.to_s)
+  end
+end
+
+module Puppet::Parser::Functions
+  newfunction(:sorted_json, :type => :rvalue, :doc => <<-EOS
+This function takes data, outputs making sure the hash keys are sorted
+
+*Examples:*
+
+    sorted_json({'key'=>'value'})
+
+Would return: {'key':'value'}
+    EOS
+  ) do |arguments|
+    raise(Puppet::ParseError, "sorted_json(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size != 1
+
+    json = arguments[0]
+    return sorted_json(json)
+  end
+end
+