Thanks for making a contribution to the Heroku Node.js Buildpack!
Note: If you are looking to open an issue or make a contribution to the Heroku Node.js Cloud Native Buildpacks (this includes builds made with pack), go here: https://github.com/heroku/nodejs-engine-buildpack
Before you get started, you may want to install Docker. Docker will be needed to run the test suite.
If you don't install Docker, you have the option of waiting until your pull request open to run tests. The Travis tests can be found here.
First, you will want to fork and clone the repository.
git clone git@github.com:your-username/heroku-buildpack-nodejs.gitOnce you have this on your local machine, you're ready to start making changes.
There are unit tests that are run with shunit. For any change you make, write a unit test in test/run that would break if you removed the code that you've just worked on. Add a fixture (test/fixtures/*) if you need an additional sample app to test with. More info about testing here.
To run the tests, run make test. You will need Docker installed. This will start a test run of all 3 Heroku stack images that will run serially. If you want to test one stack image (which is usually adequate), run make heroku-22 (or whatever stack image you'd like to test).
After the work is completed, please open a pull request. If it links to an Issue, please make sure to include in the Description:
Fixes: https://github.com/heroku/heroku-buildpack-nodejs/issues/xxxIn the Description, also add an explanation of the work that's done and the tests that are included.