Publishing in Google Play with dynamic track name

[StarK8912]

If you are looking for help, please confirm the following...

• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

Define a variable base on the current branch like:

• name: Set up Environment data
  script: |
  if [ $CM_BRANCH == "master" ] ; then
  export GOOGLE_PLAY_TRACK="production"
  else
  export GOOGLE_PLAY_TRACK="internal"
  fi

...

publishing:
google_play:
credentials: $GCLOUD_SERVICE_ACCOUNT_CREDENTIALS
track: $GOOGLE_PLAY_TRACK

Expected results

Use the variable value to push the artifact to internal or production track

Actual results

Track "$GOOGLE_PLAY_TRACK" not found in Google Play

Build id (optional)

No response