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# 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.published = true
          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