How to ship a Sinatra application as a gem and deploy it?

Question

I have a sinatra application and packaged that as a gem. Its file-layout looks roughly like this: ``` ├── bin │ └── tubemp ├── lib │ └── tubemp.rb ├── Gemfile └── tubemp.gemspec ``` I can install and run it just fine. Calling `ruby lib/tubemp.rb` fires the app too, because Sinatra made it self-starting. `tubemp.rb`: ``` class Tubemp < Sinatra::Application get '/' do erb :index, :locals => { :title => "YouTube embeds without third party trackers." } end end ``` The binary is really simple too. `bin/tubemp`: ``` #!/usr/bin/env ruby require "tubemp.rb" Tubemp.run! ``` But now I want to deploy this as Rack-app. Or deploy it inside a Rack-app. At least it should run under Passenger on a production machine. With a generic application it is as simple as adding a `config.ru` in the directory where the application lives. This file then, roughly, includes and calls `run Tubemp`. Pointing nginx or apache's passenger at the dir where this rackup file and the app lives, starts it. This worked, up…

Accepted Answer

Ignoring path-issues for now, here is how I solved it:

The application bundled as gem, `tubemp`.

A `Gemfile` to install and include the gemified application:

```
gem 'tubemp'
```

A `config.ru` which runs the gemified application, called `Tubemp`:

```
require 'rubygems'
require 'bundler/setup' # To allow inclusion via the Bundle/Gemfile
require 'sinatra'       # Sinatra is required so we can call its "set"
require 'tubemp'        # And include the application

# Set the environment to :production on production
set :environment, ENV['RACK_ENV'].to_sym

# And fire the application.
run Tubemp
```

These two files is all that is needed to make a new rack-application, which includes the gemified Sinatra-app and as such are bootable trough e.g. nginx, passenger or simply `rackup`.

How to ship a Sinatra application as a gem and deploy it?

Solution

Problem