# Monkeypatch for Jekyll
 # Introduce distinction between preview/productive site generation
 # so posts with YAML attribute `published: false` can be previewed
 # on localhost without being published to the productive environment.
 
 module Jekyll
 
   class Site
     # Read all the files in <source>/<dir>/_posts and create a new Post
     # object with each one.
     #
     # dir - The String relative path of the directory to read.
     #
     # Returns nothing.
     def read_posts(dir)
       base = File.join(self.source, dir, '_posts')
       return unless File.exists?(base)
       entries = Dir.chdir(base) { filter_entries(Dir['**/*']) }
 
       # first pass processes, but does not yet render post content
       entries.each do |f|
         if Post.valid?(f)
           post = Post.new(self, self.source, dir, f)
 
           # Monkeypatch:
           # On preview environment (localhost), publish all posts

           if ENV.has_key?('OCTOPRESS_ENV') && ENV['OCTOPRESS_ENV'] == 'preview' && post.data.has_key?('published') && post.data['published'] == false

             post.published = true

             # Set preview mode flag (if necessary), `rake generate` will check for it
             # to prevent pushing preview posts to productive environment
             File.open(".preview-mode", "w") {}

           end
 
           if post.published && (self.future || post.date <= self.time)
             self.posts << post
             post.categories.each { |c| self.categories[c] << post }
             post.tags.each { |c| self.tags[c] << post }
           end
         end
       end
 
       self.posts.sort!
 
       # limit the posts if :limit_posts option is set
       self.posts = self.posts[-limit_posts, limit_posts] if limit_posts
     end
   end
 end