Bazel + pypi installation of mujoco fails because of whitespace in name MuJoCo (mjpython).app

[hartikainen]

Intro

Hi!

I am a MuJoCo user working on manipulation.

My setup

MuJoCo:
(built from dba32e8)

$ python -c "import mujoco; print(mujoco.__version__)"
3.2.3

API:
Python

OS:

$ python -c "import platform; print(f'{platform.system()=}, {platform.release()=}, {platform.machine()=}')"
platform.system()='Darwin', platform.release()='24.0.0', platform.machine()='arm64'

What's happening? What did you expect?

Installing mujoco pypi package using Bazel's rules_python fails because Bazel doesn't support whitespaces in filenames and mujoco's wheel contains MuJoCo (mjpython).app with whitespace in its name.

This can be worked around at least a couple of different way. One way is to explicitly exclude MuJoCo (mjpython).app from the installation like done here: https://github.com/hartikainen/mjx-bazel-test/blob/d93ae5f8a005323fb248f600d5e6d5a94deb315a/MODULE.bazel#L18-L22. This is not ideal as someone might actually need the MuJoCo (mjpython).app. I've verified that his works, though. Alternatively, bazelbuild/bazel#4327 suggests that --experimental_inprocess_symlink_creation might fix the problem although I haven't verified this. The requirement for experimental flag seems unideal, however.

Perhaps a better solution would be to replace the whitespace with an underscore and rename MuJoCo (mjpython).app to MuJoCo_(mjpython).app to make mujoco's Bazel installation a bit smoother?

Steps for reproduction

Clone there repository here and run bazel run //:mjx_test from the project root.

Minimal model for reproduction

N/A

Code required for reproduction

See above.

Confirmations

• I searched the latest documentation thoroughly before posting.
• I searched previous Issues and Discussions, I am certain this has not been raised before.