lib/blogit/parsers/markdown_parser.rb in blogit-0.7.0 vs lib/blogit/parsers/markdown_parser.rb in blogit-0.8.0

@@ -1,28 +1,49 @@
 class Blogit::Parsers::MarkdownParser
   
   require "nokogiri"
   require "albino"
   require "blogit/renderers"
-  
+    
   def initialize(content)
     @content = content
   end
 
   def parsed
+    ensure_pygments_is_installed if Blogit::configuration.highlight_code_syntax
+    
     renderer = Blogit::configuration.highlight_code_syntax ?  Redcarpet::Render::HTMLWithAlbino : Redcarpet::Render::HTML
     markdown = Redcarpet::Markdown.new(renderer, Blogit.configuration.redcarpet_options)
     html_content = markdown.render(@content).html_safe
   end
 
   private
+  
+  def ensure_pygments_is_installed
+    warning = <<-WARNING
+[blogit] The pygmentize command could not be found in your load path!
+         Please either do one of the following:
 
-  def syntax_highlighter(html)
-    doc = Nokogiri::HTML(html)
-    doc.search("//pre[@lang]").each do |pre|
-      puts "/"
-      pre.replace Albino.colorize(pre.text.rstrip, pre[:lang])
+         $ sudo easy_install Pygments # to install it
+         
+         or 
+         
+         set config.highlight_code_syntax to false in your blogit.rb config file.
+         
+WARNING
+    raise warning unless which(:pygmentize)
+  end
+  
+  # Check if an executable exists in the load path
+  # Returns nil if no executable is found
+  def which(cmd)
+    exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
+    ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
+      exts.each do |ext|
+        exe = File.join(path, "#{cmd}#{ext}")
+        return exe if File.executable? exe
+      end
     end
-    doc.inner_html
-  end  
-
+    return nil
+  end
+  
 end