Static Home Directory in Cache steps causes issues with Self-Hosted Runner

[XxInvictus]

There are two places where the home directory is set manually instead of depending on dynamic references:

mc-runtime-test/action.yml

Line 81 in 398830d

path: /home/runner/.minecraft

mc-runtime-test/action.yml

Line 88 in 398830d

path: /home/runner/.minecraft

This causes issues with Self-Hosted Runner's as the execution user is often a custom user and not the "runner" user as the Github Hosted Runner's uses.

While not ideal without a default Github variable to get the home directory a potential solution is to use ~/.minecraft which should resolve to the correct home directory whether Github Hosted or Self-Hosted.

Alternative and more elegant solution would likely be to add a parameter for mc-home-dir or something similar which would allow overriding the directories of headlessmc with the hmc.mcdir parameter and also update the cache locations (and anywhere else the .minecraft location is used)

[XxInvictus]

Just to add on to this. I believe the alternative of using hmc.mcdir is more future-proof and cross-compatible. Using something like RUNNER_TEMP ensures that it uses a temporary directory for that job and doesn't persist across job runs unless caching is explicitly used.