include dot file support

lib/jekyll/graphviz.rb

@@ -1,6 +1,7 @@
 require "jekyll"
 require "jekyll/graphviz/version"
 require "jekyll/graphviz/block"
+require "jekyll/graphviz/dotf"
 
 module Jekyll
   module Graphviz
@@ -10,3 +11,4 @@ module Graphviz
 Liquid::Template.register_tag('graphviz', Jekyll::Graphviz::Block)
 Liquid::Template.register_tag('graph', Jekyll::Graphviz::Block)
 Liquid::Template.register_tag('digraph', Jekyll::Graphviz::Block)
+Liquid::Template.register_tag('dotf', Jekyll::Graphviz::DotF)

lib/jekyll/graphviz/dotf.rb

@@ -0,0 +1,22 @@
+require "liquid/tag"
+require "jekyll/graphviz/renderer"
+
+module Jekyll
+  module Graphviz
+    class DotF < Liquid::Tag
+        def initialize tag_name, path, tokens
+            super
+            @path = path
+        end
+
+        def render context
+            config = context.registers[:site].config
+            renderer = Jekyll::Graphviz::Renderer.new(config["graphviz"])
+
+            page = context.registers[:page]
+            path = File.dirname(page[:relative_path]) + "/" + @path
+            renderer.render_dotf path
+        end
+    end
+  end
+end

lib/jekyll/graphviz/renderer.rb

@@ -12,6 +12,11 @@ def initialize config = nil
       @config = config || {}
     end
 
+    def render_dotf path
+        code = File.read path.strip
+        render code, File.basename(path, ".*")
+    end
+
     def render code, title = nil
       title = gen_title(title, code)
       svg = generate_svg code