capture_once jekyll plugin, autosize fixes

pages/_plugins/jekyll-capture.rb

@@ -8,10 +8,10 @@ module Jekyll
 
       def render(context)
         if $captured_global[@text] === nil
-          $captured_global[@text] = '';
+          $captured_global[@text] = [];
         end
 
-        $captured_global[@text] += super.strip + "\n\n"
+        $captured_global[@text].push(super.strip)
 
         ''
       end
@@ -31,24 +31,49 @@ module Jekyll
         ''
       end
     end
+
+    class CaptureOnce < Liquid::Block
+      def initialize(tag_name, text, tokens)
+        super
+        @text = text.strip
+      end
+
+      def render(context)
+        if $captured_once[@text] === nil
+          $captured_once[@text] = [];
+        end
+
+        data = super.strip
+
+        unless $captured_once[@text].include?(data)
+          $captured_once[@text].push(data);
+        end
+
+        ''
+      end
+    end
   end
 
   Jekyll::Hooks.register :site, :after_init do |page, jekyll|
     $captured_global = {}
     $captured_libs = []
+    $captured_once = {}
   end
 
   Jekyll::Hooks.register :pages, :pre_render do |page, jekyll|
     jekyll.site['captured_global'] = $captured_global
+    jekyll.site['captured_once'] = $captured_once
     jekyll.site['captured_libs'] = $captured_libs
   end
 
   Jekyll::Hooks.register :pages, :post_render do |page, jekyll|
     $captured_global = {}
     $captured_libs = []
+    $captured_once = {}
   end
 end
 
 Liquid::Template.register_tag('capture_global', Jekyll::Tags::CaptureGlobal)
+Liquid::Template.register_tag('capture_once', Jekyll::Tags::CaptureOnce)
 Liquid::Template.register_tag('append_lib', Jekyll::Tags::CaptureScripts)