Get review apps env var

[Blaked84]

If an app uses an app.json file with required env var without default value, the app is not created.

I'm working on an update to get the env vars defined for the review apps in the Heroku pipeline and I'll open a PR today.

[pmbanugo]

Can you elaborate more on it? Which version are you using? Value's in app.json are not recognised?

I think the env var should be handled automatically since it's the /review-apps endpoint.

[Blaked84]

I used the last version (2.0.0-dev).

In my app.json, I don't have default values, only requirement like:

    "MY_ENV_VAR": {
      "required": true
    },

I can retrieve the env var with:
https://github.com/Blaked84/heroku-review-app-actions/blob/main/action.yaml#L54-L63
and
https://github.com/Blaked84/heroku-review-app-actions/blob/main/action.yaml#L76

I can open a PR if this solution is OK for you.