Add textile helper method. Tilt supports textile for quite some time now, but it was not as easy to use as haml or erb, and not documented. Tests and documentation (English and German) included.

README.de.rdoc

@@ -343,6 +343,31 @@ aufzurufen:
   %h1 Hallo von Haml!
   %p= markdown(:greetings)
 
+=== Textile-Templates
+
+Das RedCloth gem wird benötigt um Textile-Templates rendern zu können:
+
+  ## redcloth muss eingebunden werden
+  require "redcloth"
+
+  get '/' do
+    textile :index
+  end
+
+Dieser Code rendert <tt>./views/index.textile</tt>.
+
+Da es weder möglich ist Methoden aufzurufen, noch +locals+ zu übergeben, ist
+es am sinnvollsten Textile in Kombination mit einer anderen Template-Engine
+zu nutzen:
+
+  erb :overview, :locals => { :text => textile(:introduction) }
+
+Es ist auch möglich die +textile+ Methode aus anderen Templates heraus
+aufzurufen:
+
+  %h1 Hallo von Haml!
+  %p= textile(:greetings)
+
 === Inline-Templates
 
   get '/' do

README.rdoc

@@ -337,6 +337,28 @@ Note that you may also call the markdown method from within other templates:
   %h1 Hello From Haml!
   %p= markdown(:greetings)
 
+=== Textile Templates
+
+The RedCloth gem/library is required to render Textile templates:
+
+  ## You'll need to require rdiscount in your app
+  require "redcloth"
+
+  get '/' do
+    textile :index
+  end
+
+Renders <tt>./views/index.textile</tt>.
+
+It is not possible to call methods from textile, nor to pass locals to it. You therefore will usually use it in combination with another rendering engine:
+
+  erb :overview, :locals => { :text => textile(:introduction) }
+
+Note that you may also call the textile method from within other templates:
+
+  %h1 Hello From Haml!
+  %p= textile(:greetings)
+
 === Inline Templates
 
   get '/' do

lib/sinatra/base.rb

@@ -343,6 +343,10 @@ module Sinatra
       render :markdown, template, options, locals
     end
 
+    def textile(template, options={}, locals={})
+      render :textile, template, options, locals
+    end
+
   private
     def render(engine, data, options={}, locals={}, &block)
       # merge app-level options

sinatra.gemspec

@@ -88,6 +88,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'less'
   s.add_development_dependency 'liquid'
   s.add_development_dependency 'rdiscount'
+  s.add_development_dependency 'RedCloth'
 
   s.has_rdoc = true
   s.homepage = "http://sinatra.rubyforge.org"

test/textile_test.rb

@@ -0,0 +1,34 @@
+require File.dirname(__FILE__) + '/helper'
+
+begin
+require 'redcloth'
+
+class TextileTest < Test::Unit::TestCase
+  def textile_app(&block)
+    mock_app do
+      set :views, File.dirname(__FILE__) + '/views'
+      get '/', &block
+    end
+    get '/'
+  end
+
+  it 'renders inline textile strings' do
+    textile_app { textile 'h1. Hiya' }
+    assert ok?
+    assert_equal "<h1>Hiya</h1>", body
+  end
+
+  it 'renders .textile files in views path' do
+    textile_app { textile :hello }
+    assert ok?
+    assert_equal "<h1>Hello From Textile</h1>", body
+  end
+
+  it "raises error if template not found" do
+    mock_app { get('/') { textile :no_such_template } }
+    assert_raise(Errno::ENOENT) { get('/') }
+  end
+end
+rescue
+  warn "#{$!.to_s}: skipping textile tests"
+end

test/views/hello.textile

@@ -0,0 +1 @@
+h1. Hello From Textile