disable true LSI by default, enable with --lsi

History.txt

@@ -1,6 +1,7 @@
 ==
   * Major Features
     * Code highlighting with Pygments if --pygments is specified
+    * Disable true LSI by default, enable with --lsi
   * Minor Enhancements
     * Output informative message if RDiscount is not available [github.com/JackDanger]
   * Bug Fixes

bin/jekyll

@@ -25,6 +25,10 @@ opts = OptionParser.new do |opts|
     options[:auto] = true
   end
 
+  opts.on("--lsi", "Use LSI for better related posts") do
+    Jekyll.lsi = true
+  end
+
   opts.on("--pygments", "Use pygments to highlight code") do
     Jekyll.pygments = true
   end

lib/jekyll.rb

@@ -34,9 +34,10 @@ module Jekyll
   VERSION = '0.1.4'
 
   class << self
-    attr_accessor :pygments
+    attr_accessor :lsi, :pygments
   end
 
+  Jekyll.lsi = false
   Jekyll.pygments = false
 
   def self.process(source, dest)

lib/jekyll/post.rb

@@ -97,16 +97,21 @@ def id
     # Returns [<Post>]
     def related_posts(posts)
       return [] unless posts.size > 1
-      self.class.lsi ||= begin
-        puts "Running the classifier... this could take a while."
-        lsi = Classifier::LSI.new
-        posts.each { |x| $stdout.print(".");$stdout.flush;lsi.add_item(x) }
-        puts ""
-        lsi
-      end
+
+      if Jekyll.lsi
+        self.class.lsi ||= begin
+          puts "Running the classifier... this could take a while."
+          lsi = Classifier::LSI.new
+          posts.each { |x| $stdout.print(".");$stdout.flush;lsi.add_item(x) }
+          puts ""
+          lsi
+        end
 
-      related = self.class.lsi.find_related(self.content, 11)
-      related - [self]
+        related = self.class.lsi.find_related(self.content, 11)
+        related - [self]
+      else
+        (posts - [self])[0..9]
+      end
     end
 
     # Add any necessary layouts to this post