Convert wordpress links to local links, implement post_link tag that includes baseurl

_plugins/post_link.rb

@@ -0,0 +1,31 @@
+require 'jekyll/tags/post_url'
+
+module Jekyll
+    class PostLink < Liquid::Tag
+        def initialize(tag_name, post, tokens)
+            super
+            @orig_post = post.strip
+            begin
+                @post = Jekyll::Tags::PostComparer.new(@orig_post)
+            rescue
+                raise ArgumentError.new <<-eos
+Could not parse name of post "#{@orig_post}" in tag 'post_url'.
+
+Make sure the post exists and the name is correct.
+eos
+            end
+        end
+
+        def render(context)
+            site = context.registers[:site]
+            site.posts.docs.each do |p|
+              if @post == p
+                return '/' + context.registers[:site].config['baseurl'] + p.url
+              end
+            end
+        end
+        
+    end
+end
+ 
+Liquid::Template.register_tag('post_link', Jekyll::PostLink)