Pipeline support

[xavdid]

Adds support for specifying a --pipeline-name and --pipeline-stage instead of an --app. Fixes #25.

[xavdid]

@ErlanBazarov @mpvosseller ok, i've got a proof-of-concept up! It's only the pull command so far while we make sure this does what you want.

Unfortunately, I don't use heroku much these days and don't have any pipelines set up correctly to actually use this feature. So, I'd really appreciate a hand testing it. To install it:

1. Have yarn and node.js installed locally
2. Clone this repo
3. git checkout pipeline-support
4. yarn
5. heroku plugins:link

Now when you run heroku config:pull, it'll use this branch. The --help docs are updated, so let me know if they make sense. You should be able to play around and reference an app by --pipeline-name and --pipeline-stage instead of --app.

Alternatively, you could (temporarily) invite me to a sample pipeline that is already set up and I can test this out manually.

Thanks for your help here!

[mpvosseller]

@xavdid Amazing! I'll try to check this out soon. FWIW setting up a pipeline to test this is trivial and can be done for free with an empty placeholder app and pipeline.

• Create an empty app
  heroku apps:create my-test-app

• Create an empty pipeline with your app as staging (every pipeline needs at least one app)
  heroku pipelines:create my-test-pipeline -a my-test-app -s staging

• Manually connect the pipeline to a GitHub repo and enable Review Apps

  • Heroku Dashboard -> My Test Pipeline -> "Connect to GitHub" -> Find and select a repo -> Connect -> Once Connected -> Click "Enable Review Apps" below and do so with default settings

• You should now be able to test your tool!

• See the review app config vars in the Heroku Dashboard:

  • Heroku Dashboard -> My Test Pipeline -> Settings -> Review Apps -> Reveal Config Vars

[mpvosseller]

@xavdid I tested it out and config:pull appears to do exactly what I would like! I also just invited you to a new heroku team (configpullteam) with a pipeline (cft-pipeline) so you can test it out yourself.

heroku config:pull --pipeline-name=cft-pipeline --pipeline-stage=review

[xavdid]

@mpvosseller awesome, great to hear!

I'm not seeing that invite, in my heroku dashboard but it's probably ok! If it's working, I should be able to add the other pieces.

[xavdid]

Ok, that should do it!

I can do some manual testing later, but the PR as written should push and pull using the exact same logic as before, but now targeting pipes instead.

You're welcome to try the heroku invite again, or you can just test it yourself and I can release once you give the 👍

[xavdid]

Ok, tests look good! Merging and deploying.