README.md

Install

• Create each of these files in a single folder
• bundle install

Development

• middleman

You need to restart middleman after each change in dynamic_app.rb The alternative for development is to put everything in config.rb but that's not really pretty.

Testing in "compiled mode" (Sometimes you want to do this)

• middleman build
• foreman start

After that, don't forget to rm -fr ./tmp

Deploying to Heroku:

Nothing special, plain old ruby deployment: git push heroku master

The deployment process will do a rake assets:precompile step that will build the middleman site. The config.ru serves static files first if they're found, so any file that was built statically will be served, otherwise, it'll fall back to your Sinatra app. Ain't that pretty?

config.rb

require 'dynamic_app'

set :build_dir, 'tmp'
# ... Rest of your middleman config
use DynamicApp

config.ru

require 'rack'
require 'try_static'
require 'dynamic_app'

# First, `use` our hullapp middleware
use DynamicApp

# Serve Static Files
use Rack::TryStatic, :root => 'tmp', :urls => %w[/], :try => ['.html', 'index.html', '/index.html']

# Minimal 404
run lambda { |env|
  not_found_page = File.expand_path('../build/404/index.html', __FILE__)
  if File.exist?(not_found_page)
    [ 404, { 'Content-Type'  => 'text/html'}, [File.read(not_found_page)] ]
  else
    [ 404, { 'Content-Type'  => 'text/html' }, ['404 - page not found'] ]
  end
}

dynamic_app.rb

require 'sinatra'
require 'sinatra/base'

class DynamicApp < Sinatra::Base

  # Tweak to your needs
  set :static, true 
  set :public_folder, File.dirname(__FILE__) + '/tmp'

  post '/reviews' do
    # Do your dynamic things here.
  end

end

Gemfile

source 'http://rubygems.org'

##################
# Rack
##################
  gem 'puma'
  gem 'rake'
  gem 'rack-contrib'

##################
# Middleman
##################
  gem 'middleman'
  gem 'middleman-sprockets'
  gem 'middleman-smusher'
  gem 'middleman-minify-html'
  gem 'middleman-livereload'


# Below this is: Not necessary, but what I like to have in an app :)

##################
# Data
##################
  gem 'hullio'
  gem 'builder'
  gem 'hashie'
  gem 'activesupport'
  gem 'awesome_print'

##################
# Assets
##################
  gem 'uglifier'
  gem 'slim'
  gem 'sanitize'
  gem 'handlebars_assets'

  gem 'sass', '~> 3.2.5'
  gem 'compass', :git => 'git://github.com/chriseppstein/compass.git', :tag => 'v0.13.alpha.4'
  gem 'sass-getunicode'
  gem 'bootstrap-sass', '3.0.3.0'

##################
# JS
##################
  gem 'execjs'
  gem 'json', '~> 1.8.0'
  gem 'oj'        # faster JSON


##################
# Fixtures
##################
  gem 'uifaces'
  gem 'random_data'

##################
# Build Targets
##################
group :development do
  gem 'foreman'
  gem 'fontcustom'
end

Procfile

web: bundle exec puma -p $PORT

Rakefile

namespace :assets do
  task :precompile do
    sh 'middleman build'
  end
end

try_static.rb

# Customized version of the TryStatic standard rack.
module Rack
  class TryStatic
    def initialize(app, options)
      @app = app
      @try = ['', *options.delete(:try)]
      @static = ::Rack::Static.new(lambda { [404, {}, []] }, options)
    end

    def call(env)
      orig_path = env['PATH_INFO']
      found = nil
      
      @try.each do |path|
        resp = @static.call(env.merge!({'PATH_INFO' => orig_path + path}))
        break if 404 != resp[0] && found = resp
      end

      found or @app.call(env.merge!('PATH_INFO' => orig_path))
    end
  end
end