Detection
A Ruby application is detected when it has a Gemfile file in the root
directory. If your application has no dependencies, it should include an empty
Gemfile file.
MRI Ruby versions
All MRI Ruby versions 1.9+ and 2.+ are supported. Newer versions are
automatically compiled on-demand if you ask for them.
Your version will either default to 2.3.4, or the version you've specified in your Gemfile. For instance:
cat Gemfile source "https://rubygems.org" ruby "2.3.0" # rest of your Gemfile
The most recent versions we officially support are as follow:
| Ruby version | Rubygems version |
|---|---|
2.4.1 patchlevel 111
|
2.6.11 |
2.3.4 patchlevel 301
|
2.5.2 |
2.2.7 patchlevel 470
|
2.4.5.2 |
Generally, you should follow the guidelines outlined in this Heroku article.
JRuby versions
JRuby versions are no longer supported at the moment.
Example applications
- OpenProject, the web-based project management system.
- Gitlab, the Open source software to collaborate on code.
- Discourse, the platform for community discussion.
- example-sinatra-app, a really simple sinatra app to get you started.