Question

I’m trying to refactor my sinatra code to separate my main file into separate files, using some tips from this response, and I’m having troubles deploying to heroku.

Previously I didn’t have a config.ru file, and just used my Procfile, which was:

web: bundle exec ruby web.rb -p $PORT

as per this article.

From the refactor, I’ve now changed my Procfile to

web: bundle exec thin -R config.ru start -p $PORT

With my config.ru file being

root = ::File.dirname(__FILE__)
require ::File.join( root, 'web' )
run MyApp.new

And my web.rb file being contained around a class definition

class MyApp < Sinatra::Application
  # ...
end

This works on my local development computer, but when I deploy to heroku, I get

2011-12-01T11:21:54+00:00 app[web.1]: bundler: command not found: thin
2011-12-01T11:21:54+00:00 app[web.1]: Install missing gem executables with `bundle install`
2011-12-01T11:21:56+00:00 heroku[web.1]: State changed from starting to crashed
2011-12-01T11:22:01+00:00 heroku[router]: Error H10 (App crashed) -> GET [my app].herokuapp.com/ dyno= queue= wait= service= status=503 bytes=
2011-12-01T11:22:02+00:00 heroku[router]: Error H10 (App crashed) -> GET [my app].herokuapp.com/favicon.ico dyno= queue= wait= service= status=503 bytes=

Is thin not installed on heroku? Or is there some other way of running my app on heroku with the changes?

Answer 1

I had to update my Procfile because the RACK_ENV isn’t passed into the heroku environment. The Procfile became:

web: bundle exec thin -R config.ru start -p $PORT -e $RACK_ENV