Heroku pre-deploy buildpack (GITSHA)

Prerequisite (Napa services only)

bundle update --source napa

There are a couple of ways of utilizing multiple buildpacks on Heroku. David Dollar has a convenient heroku-buildpack-multi, which looks at a .buildpacks file to download, execute, and continue through each buildpack defined in .buildpacks. This file clearly defines all the buildpacks and their order; therefore, I will suggest this method over the CLI method described later:

Enable with ddollar/heroku-buildpack-multi

1) Enable multiple buildpacks:

heroku buildpacks:set https://github.com/ddollar/heroku-buildpack-multi.git

2) Add this gitsha buildpack

Add the following to a .buildpacks file in our root directory:

https://github.com/bellycard/heroku-buildpack-gitsha.git
https://github.com/heroku/heroku-buildpack-ruby.git

Enable with Heroku's CLI (Alternative setup)

Please refer to this article on heroku

1) Add the buildpacks via Heroku CLI

heroku buildpacks:set https://github.com/heroku/heroku-buildpack-ruby
heroku buildpacks:add --index 1 https://github.com/bellycard/heroku-buildpack-gitsha.git

2) Verify buildpacks

heroku buildpacks

NOTE: If you wantt to switch from this method to using ddollar's heroku-buildpack-multi, you will need to clear the existing buildpacks:

heroku buildpacks:clear

GITSHA

This buildpack will include a new .gitsha file containing the git revesion

If you are using napa, this will be available to the /health endpoint