Github Actions isn't working with the gradle cache anymore

[zach-klippenstein]

Github seems to have stopped recursively expanding environment variables, so our GRADLE_BUILD_CACHE variable that is set to $HOME/.gradle/caches gets resolved literally as $HOME/.gradle/caches, which is obviously not the real path.

Furthermore, ${{ env.HOME }} resolves to the empty string, so I'm not sure how to get the home directory anymore.

Some exploration of what broke was done in #1131.

[Kiskae]

You might want to consider turning the problem around and defining a custom GRADLE_USER_HOME instead of using the default $HOME/.gradle, then caching $GRADLE_USER_HOME/caches. If the caching mechanism is path-relative it might even be possible to isolate it to the current build instead of using the user environment.

[zach-klippenstein]

I agree that would be ideal, but I couldn't figure out how to specify a custom cache path when running Gradle. I only saw --project-cache-dir which I tried, but it didn't seem to affect all the caches. There's also --gradle-user-home which I missed the first time. I'll try again, one of those should definitely work.

[Kiskae]

--project-cache-dir seems to control where the local build artifacts (that dont end up in /build) go (<projectDir>/.gradle), while --gradle-user-home controls the global wrapper/module cache location. (<HOME>/.gradle)

[zach-klippenstein]

square/workflow-kotlin-compose#30