feat: Added mustache templating.

mustache/spec/Rakefile

@@ -0,0 +1,36 @@
+require 'json'
+require 'yaml'
+
+# Our custom YAML tags must retain their magic.
+class TaggedMap < Hash
+  yaml_tag '!code'
+  def init_with(psych_coder)
+    self.replace({:__tag__ => 'code'}.merge(psych_coder.map))
+  end
+end
+
+YAML::add_tag('code', TaggedMap)
+
+desc 'Build all alternate versions of the specs.'
+multitask :build => [ 'build:json' ]
+
+namespace :build do
+  note = 'Do not edit this file; changes belong in the appropriate YAML file.'
+
+  desc 'Build JSON versions of the specs.'
+  task :json do
+    rm(Dir['specs/*.json'], :verbose => false)
+    Dir.glob('specs/*.yml').each do |filename|
+      json_file = filename.gsub('.yml', '.json')
+
+      File.open(json_file, 'w') do |file|
+        warning = {:__ATTN__ => note}
+        doc = YAML.load_file(
+            filename,
+            permitted_classes: [TaggedMap]
+        )
+        file << JSON.pretty_generate(warning.merge(doc)) << "\n"
+      end
+    end
+  end
+end