Using Rust in Ruby, Deployed to Heroku Using Sinatra

Setup & Compilation

• Install rust & cargo
• Install bundler

rbenv install
bundle install
(cd calculator && cargo build --release)

Tests

rspec

Run Sinatra App

open 'http://localhost:4567'
ruby rustapp.rb

Compilation and Platforms

The shared library has to be compiled for your CPU architecture. On mac osx the Rust code is comiled to libcalculator.dylib and on linux it is compiled to libcalculator.so. It should compile to libcalculator.dll on Windows, but the ruby code will not work there unless you edit app/fast_calculator.rb.

Deployment

The app has been tested under mac osx and linux. It can be deployed directly to heroku:

• Install the heroku toolbelt

heroku create
git push heroku master
heroku run rspec
heroku open

Remember to compile and commit libcalculator.so for linux before pushing to Heroku.

Demo

It may take a while for heroku to start the VM (e.g. 30 seconds). Be patient.

https://rocky-headland-3541.herokuapp.com/