Manage Heroku Review Apps

by FastRuby.io

How to:

If you want to create a Review App when the label create-review-app is added to a PR (for example):

# .github/workflows/create-review-app.yml

name: Review App
on:
  pull_request:
    types: [labeled]

jobs:
  create-review-app:
    if: ${{ github.event.label.name == 'create-review-app' }}
    runs-on: ubuntu-latest

    steps:
      - uses: fastruby/[email protected]
        with:
          action: create
        env:
          HEROKU_API_TOKEN: ${{ secrets.HEROKU_API_TOKEN }}
          HEROKU_PIPELINE_ID: ${{ secrets.HEROKU_PIPELINE_ID }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

If you want to destroy a review app when the PR is closed.

# .github/workflows/destroy-review-app.yml

name: Destroy Review App
on:
  pull_request:
    types: [closed]

jobs:
  destroy-review-app:
    steps:
      - uses: fastruby/[email protected]
        with:
          action: destroy
        env:
          HEROKU_API_TOKEN: ${{ secrets.HEROKU_API_TOKEN }}
          HEROKU_PIPELINE_ID: ${{ secrets.HEROKU_PIPELINE_ID }}

Note GITHUB_TOKEN is not needed for the destroy action

Configuration

Inputs:

action

• create will trigger a Review App creation for the current PR, will fail if the Review App already exists
• destroy will trigger a Review App destroy for the current PR, if any

Review Apps will be re-deployed automatically after a new push, there's no need to trigger any action

Requirements:

In GitHub

You have to setup 2 secrets in your repo (1):

• HEROKU_API_TOKEN: you can get this from your Heroku's settings (2)
• HEROKU_PIPELINE_ID: you can get this from the URL of the specific pipeline (3)

*1 Go to Settings (of the repo), select Secrets on the sidebar, and click New repository secret

*2 Go to Account settings, look for the API Key section and click Reveal to see the token

*3 Open your pipeline in Heroku's website and extract the uuid from the url (https://dashboard.heroku.com/pipelines/abc2e115-5cd9-48e9-b591-cf66c265e845 => abc2e115-5cd9-48e9-b591-cf66c265e845)

In Heroku:

The target pipeline must already have Review Apps enabled and it should be using the new Review Apps version introduced in November 2019 https://devcenter.heroku.com/articles/github-integration-review-apps#changes (the older version can't be controlled with an API).

How to contribute:

• Run npm install to get the needed dependencies
• Before committing changes, remember to rebuild the final .js file with npm run prepare
• Always commit the dist/* files
• After pushing the changes, make a new release in GitHub so you can target that version in the workflow config

To show debug messages in the action's log, you can add a repo secret with the key ACTIONS_STEP_DEBUG and the value true

TODO:

• Only allow interactions of collaborators to trigger the actions to prevent abuse.
• Add linter/prettier