How to copy staging/dev/production application config variable to Review app config vars?

Issue

Review Apps don't support inheriting config vars, you can specify config variables through app.json or Set any sensitive environment variables in the Review app config vars section of your pipeline’s settings, but there is no CLI option to copy config variables of other application into Review app config vars section.

Resolution

To copy all the config variables of other application into Review app config vars section, we will use Platform API, run following command:

CONFIG_VARS=$(echo $(heroku config -a <APPLICATION_NAME> --json)) && curl -n -X PATCH https://api.heroku.com/pipelines/{pipeline_id}/stage/review/config-vars -d "$CONFIG_VARS" -H "Content-Type: application/json" -H "Accept: application/vnd.heroku+json; version=3"

Change <APPLICATION_NAME> to the name of the application from which you want to copy config vars and change {pipeline_id} with the id of pipeline in which you wants to copy config vars.

Note: Review Apps need to be enabled on pipeline.