lib/liquid_diagrams/renderers/graphviz_renderer.rb in liquid-diagrams-0.3.0 vs lib/liquid_diagrams/renderers/graphviz_renderer.rb in liquid-diagrams-0.4.0

@@ -1,33 +1,33 @@
 # frozen_string_literal: true
 
 module LiquidDiagrams
   module Renderers
     class GraphvizRenderer < BasicRenderer
-      MAPPERS = {
+      CONFIG_MAPPERS = {
         'layout' => 'K',
         'graph_attributes' => 'G',
         'node_attributes' => 'N',
         'edge_attributes' => 'E'
       }.freeze
 
       XML_REGEX = /^<\?xml(([^>]|\n)*>\n?){2}/.freeze
 
       def render
-        output = Rendering.render_with_stdin_stdout(build_command, @content)
-        output.dup.force_encoding('utf-8').sub(XML_REGEX, '')
+        Rendering.render_with_stdin_stdout(build_command, @content)
+                 .encode('utf-8').sub(XML_REGEX, '')
       end
 
-      def build_command
-        command = +'dot -Tsvg'
+      def executable
+        'dot -Tsvg'
+      end
 
-        @config.slice(*MAPPERS.keys).each do |opt, attrs|
-          command << Utils.join(attrs, with: " -#{MAPPERS[opt]}") do |attr|
+      def arguments
+        @config.slice(*CONFIG_MAPPERS.keys).map do |opt, attrs|
+          Utils.join(attrs, with: " -#{CONFIG_MAPPERS[opt]}") do |attr|
             Array(attr).join('=')
           end
-        end
-
-        command
+        end.join(' ')
       end
     end
   end
 end