Automating Android Studio project builds: what’s the best way?

For reasons outside my control, I need to export an Android Studio project and generate builds from that project instead of directly from Unity.

I need to do this all in an automated way, so with command line only.

The problem I’m facing is that once I have the exported Android Studio project, what do I even do with it? It doesn’t have a gradlew file until I try to open it at least once in Android Studio and tell it to create one, but I can’t do that if I’m creating an automated process.

What am I missing here?