heroku-google-application-credentials-buildpack

Generates a Google credential file based on Heroku Config Vars.

This is useful when using a package such as @google-cloud/storage which loads credentials from a file instead of an environmental variable.

1. Create Config Vars key GOOGLE_CREDENTIALS and paste the content of service account credential JSON file as is.
2. Create a key under Config Vars GOOGLE_APPLICATION_CREDENTIALS and set a value as google-credentials.json.

The script with generate a file called google-credentials.json which holds the key from the step #1 above.