From c742fb77014242c59db86dc3ea561df699f9e9e7 Mon Sep 17 00:00:00 2001
From: Tom Preston-Werner <tom@mojombo.com>
Date: Sat, 22 Nov 2008 12:36:32 -0800
Subject: [PATCH] implement a real related posts feature. up to 0.1.2

---
 History.txt               |  4 +++-
 Rakefile                  |  2 +-
 bin/jekyll                |  1 +
 jekyll.gemspec            |  5 ++++-
 lib/jekyll.rb             |  3 ++-
 lib/jekyll/convertible.rb |  5 +++++
 lib/jekyll/post.rb        | 13 ++++++++++++-
 7 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/History.txt b/History.txt
index 9e94db7d..89818b6d 100644
--- a/History.txt
+++ b/History.txt
@@ -1,4 +1,6 @@
-== 0.1.2 /
+== 0.1.2 / 2008-11-22
+  * Major Features
+    * Add a real "related posts" implementation using Classifier
   * Command Line Changes
     * Allow cli to be called with 0, 1, or 2 args intuiting dir paths
       if they are omitted
diff --git a/Rakefile b/Rakefile
index 3853e02c..4b2d4790 100644
--- a/Rakefile
+++ b/Rakefile
@@ -6,7 +6,7 @@ Hoe.new('jekyll', Jekyll::VERSION) do |p|
   # p.rubyforge_name = 'jekyllx' # if different than lowercase project name
   p.developer('Tom Preston-Werner', 'tom@mojombo.com')
   p.summary = "Jekyll is a simple, blog aware, static site generator."
-  p.extra_deps = ['RedCloth', 'liquid']
+  p.extra_deps = ['RedCloth', 'liquid', 'classifier']
 end
 
 desc "Open an irb session preloaded with this library"
diff --git a/bin/jekyll b/bin/jekyll
index 986c1715..a8471a22 100755
--- a/bin/jekyll
+++ b/bin/jekyll
@@ -7,6 +7,7 @@ require 'jekyll'
 case ARGV.size
   when 0
     dest = File.join('.', '_site')
+    FileUtils.rm_rf(dest)
     FileUtils.mkdir_p(dest)
     Jekyll.process('.', dest)
   when 1
diff --git a/jekyll.gemspec b/jekyll.gemspec
index f18a3d85..fcd41027 100644
--- a/jekyll.gemspec
+++ b/jekyll.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = %q{jekyll}
-  s.version = "0.1.1"
+  s.version = "0.1.2"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Tom Preston-Werner"]
@@ -25,15 +25,18 @@ Gem::Specification.new do |s|
     if Gem::Version.new(Gem::RubyGemsVersion) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<RedCloth>, [">= 0"])
       s.add_runtime_dependency(%q<liquid>, [">= 0"])
+      s.add_runtime_dependency(%q<classifier>, [">= 0"])
       s.add_development_dependency(%q<hoe>, [">= 1.8.0"])
     else
       s.add_dependency(%q<RedCloth>, [">= 0"])
       s.add_dependency(%q<liquid>, [">= 0"])
+      s.add_dependency(%q<classifier>, [">= 0"])
       s.add_dependency(%q<hoe>, [">= 1.8.0"])
     end
   else
     s.add_dependency(%q<RedCloth>, [">= 0"])
     s.add_dependency(%q<liquid>, [">= 0"])
+    s.add_dependency(%q<classifier>, [">= 0"])
     s.add_dependency(%q<hoe>, [">= 1.8.0"])
   end
 end
diff --git a/lib/jekyll.rb b/lib/jekyll.rb
index 4a598911..925e1165 100644
--- a/lib/jekyll.rb
+++ b/lib/jekyll.rb
@@ -12,6 +12,7 @@ require 'time'
 # 3rd party
 require 'liquid'
 require 'redcloth'
+require 'classifier'
 
 # internal requires
 require 'jekyll/site'
@@ -22,7 +23,7 @@ require 'jekyll/post'
 require 'jekyll/filters'
 
 module Jekyll
-  VERSION = '0.1.1'
+  VERSION = '0.1.2'
   
   def self.process(source, dest)
     Jekyll::Site.new(source, dest).process
diff --git a/lib/jekyll/convertible.rb b/lib/jekyll/convertible.rb
index d98853d1..62317bab 100644
--- a/lib/jekyll/convertible.rb
+++ b/lib/jekyll/convertible.rb
@@ -1,5 +1,10 @@
 module Jekyll
   module Convertible
+    # Return the contents as a string
+    def to_s
+      self.content || ''
+    end
+    
     # Read the YAML frontmatter
     #   +base+ is the String path to the dir containing the file
     #   +name+ is the String filename of the file
diff --git a/lib/jekyll/post.rb b/lib/jekyll/post.rb
index 3fa989dd..0d8eb716 100644
--- a/lib/jekyll/post.rb
+++ b/lib/jekyll/post.rb
@@ -4,6 +4,10 @@ module Jekyll
     include Comparable
     include Convertible
     
+    class << self
+      attr_accessor :lsi
+    end
+    
     MATCHER = /^(\d+-\d+-\d+)-(.*)(\.[^.]+)$/
     
     # Post name validator. Post filenames must be like:
@@ -77,7 +81,14 @@ module Jekyll
     #
     # Returns [<Post>]
     def related_posts(posts)
-      related = posts - [self]
+      self.class.lsi ||= begin
+        lsi = Classifier::LSI.new
+        posts.each { |x| lsi.add_item(x) }
+        lsi
+      end
+
+      related = self.class.lsi.find_related(self.content, 11)
+      related - [self]
     end
     
     # Add any necessary layouts to this post