Is there a way to download all dependencies for Android before the build with Kotlin Script Gradle? I'm trying to pre-cache all my dependencies nightly to speed up our CI builds.

You could set up a remote cache server for people and use a machine to seed the build on a nightly basis.

my team reuses the Gradle dependency cache across CI builds, which is the easiest solution IMO :)

Gradle dependency cache?

~/.gradle

, or more specifically, the directories listed on https://docs.gradle.org/current/userguide/dependency_resolution.html#sub:ephemeral-ci-cache

Well just run a build nightly with an empty cache, and use that cache for the daily builds. I don't think there is any need for a specific command