Replaced rdiscount with Maruku for Markdown with equation support

README.textile

@@ -80,8 +80,15 @@ The best way to install Jekyll is via RubyGems:
   $ sudo gem install mojombo-jekyll -s http://gems.github.com/
 
 Jekyll requires the gems `directory_watcher`, `liquid`, `open4`, 
-and optionally `rdiscount` for markdown support. These are automatically
-installed by the gem install.
+and `maruku` for markdown support. These are automatically
+installed by the gem install command.
+
+Maruku comes with optional support for LaTeX to PNG rendering via
+"blahtex":http://gva.noekeon.org/blahtexml/ (Version 0.6) which must be in
+your $PATH along with `dvips`. 
+
+(NOTE: the version of maruku I am using is `remi-maruku` on GitHub as it
+does not assume a fixed location for `dvips`.)
 
 h2. Run
 

Rakefile

@@ -5,7 +5,7 @@ require 'lib/jekyll'
 Hoe.new('jekyll', Jekyll::VERSION) do |p|
   p.developer('Tom Preston-Werner', 'tom@mojombo.com')
   p.summary = "Jekyll is a simple, blog aware, static site generator."
-  p.extra_deps = ['RedCloth', 'liquid', 'classifier', 'rdiscount', 'directory_watcher', 'open4']
+  p.extra_deps = ['RedCloth', 'liquid', 'classifier', 'maruku', 'directory_watcher', 'open4']
 end
 
 desc "Open an irb session preloaded with this library"

TODO

@@ -1,2 +1,3 @@
+[ ] Easier configuration of Maruka and blahtex directories [mdreid]
 [ ] Accurate "related posts" calculator
 [ ] Autobuild

jekyll.gemspec

@@ -26,15 +26,15 @@ Gem::Specification.new do |s|
       s.add_runtime_dependency(%q<RedCloth>, [">= 0"])
       s.add_runtime_dependency(%q<liquid>, [">= 0"])
       s.add_runtime_dependency(%q<classifier>, [">= 0"])
-      s.add_runtime_dependency(%q<rdiscount>, [">= 0"])
+      s.add_runtime_dependency(%q<maruku>, [">= 0"])
       s.add_runtime_dependency(%q<directory_watcher>, [">= 0"])
       s.add_runtime_dependency(%q<open4>, [">= 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<rdiscount>, [">= 0"])
+      s.add_dependency(%q<maruku>, [">= 0"])
       s.add_dependency(%q<directory_watcher>, [">= 0"])
       s.add_dependency(%q<open4>, [">= 0"])
       s.add_dependency(%q<hoe>, [">= 1.8.0"])
@@ -43,7 +43,7 @@ Gem::Specification.new do |s|
     s.add_dependency(%q<RedCloth>, [">= 0"])
     s.add_dependency(%q<liquid>, [">= 0"])
     s.add_dependency(%q<classifier>, [">= 0"])
-    s.add_dependency(%q<rdiscount>, [">= 0"])
+    s.add_dependency(%q<maruku>, [">= 0"])
     s.add_dependency(%q<directory_watcher>, [">= 0"])
     s.add_dependency(%q<open4>, [">= 0"])
     s.add_dependency(%q<hoe>, [">= 1.8.0"])

lib/jekyll.rb

@@ -13,9 +13,20 @@
 require 'liquid'
 require 'redcloth'
 begin
-  require 'rdiscount'
+  require 'maruku'
+  require 'maruku/ext/math'
+  # Switch off MathML output
+  MaRuKu::Globals[:html_math_output_mathml] = false
+  MaRuKu::Globals[:html_math_engine] = 'none'
+
+  # Turn on math to PNG support with blahtex
+  # Resulting PNGs stored in `images/latex`
+  MaRuKu::Globals[:html_math_output_png] = true
+  MaRuKu::Globals[:html_png_engine] =  'blahtex'
+  MaRuKu::Globals[:html_png_dir] = 'images/latex'
+  MaRuKu::Globals[:html_png_url] = '/images/latex/'
 rescue LoadError
-  puts "The rdiscount gem is required for markdown support!"
+  puts "The maruku gem is required for markdown support!"
 end
 require 'directory_watcher'
 

lib/jekyll/convertible.rb

@@ -30,7 +30,7 @@ def transform
         self.content = RedCloth.new(self.content).to_html
       when ".markdown":
         self.ext = ".html"
-        self.content = RDiscount.new(self.content).to_html
+        self.content = Maruku.new(self.content).to_html
       end
     end