resolves #1043 added a renderer for AsciiDoc files

middleman-core/lib/middleman-core/core_extensions/rendering.rb

@@ -56,6 +56,13 @@ module Middleman
           require "middleman-core/renderers/markdown"
           app.register Middleman::Renderers::Markdown
 
+          # AsciiDoc Support
+          begin
+            require "middleman-core/renderers/asciidoc"
+            app.register Middleman::Renderers::AsciiDoc
+          rescue LoadError
+          end
+
           # Liquid Support
           begin
             require "middleman-core/renderers/liquid"

middleman-core/lib/middleman-core/renderers/asciidoc.rb

@@ -0,0 +1,52 @@
+require 'asciidoctor'
+
+module Middleman
+  module Renderers
+    module AsciiDoc
+      class << self
+
+        def registered(app)
+          app.config.define_setting :asciidoc, {
+            :safe => :safe,
+            :backend => :html5,
+            :attributes => %W(showtitle env=middleman env-middleman middleman-version=#{::Middleman::VERSION})
+          }, 'AsciiDoc engine options (Hash)'
+          app.config.define_setting :asciidoc_attributes, [], 'AsciiDoc custom attributes (Array)'
+          app.before_configuration do
+            template_extensions :adoc => :html
+          end
+
+          app.after_configuration do
+            # QUESTION should base_dir be equal to docdir instead?
+            config[:asciidoc][:base_dir] = File.expand_path config[:source]
+            config[:asciidoc][:attributes].concat (config[:asciidoc_attributes] || [])
+            config[:asciidoc][:attributes] << %(imagesdir=#{File.join (config[:http_prefix] || '/').chomp('/'), config[:images_dir]})
+            sitemap.provides_metadata(/\.adoc$/) do |path|
+              # read the AsciiDoc header only to set page options and data
+              # header values can be accessed via app.data.page.<name> in the layout
+              doc = Asciidoctor.load_file path, :safe => :safe, :parse_header_only => true
+
+              opts = {}
+              opts[:layout] = (doc.attr 'page-layout') if (doc.attr? 'page-layout')
+              opts[:layout_engine] = (doc.attr 'page-layout-engine') if (doc.attr? 'page-layout-engine')
+              # TODO override attributes to set docfile, docdir, docname, etc
+              # alternative is to set :renderer_options, which get merged into options by the rendering extension
+              #opts[:attributes] = config[:asciidoc][:attributes].dup
+              #opts[:attributes].concat %W(docfile=#{path} docdir=#{File.dirname path} docname=#{(File.basename path).sub(/\.adoc$/, '')})
+
+              page = {}
+              page[:title] = doc.doctitle
+              page[:date] = (doc.attr 'date') unless (doc.attr 'date').nil?
+              # TODO grab all the author information
+              page[:author] = (doc.attr 'author') unless (doc.attr 'author').nil?
+
+              {:options => opts, :page => ::Middleman::Util.recursively_enhance(page)}
+            end
+          end
+        end
+
+        alias :included :registered
+      end
+    end
+  end
+end