Missing libcar.dylib on MacOS about webots

[SarvagyaVaish]

Making the change in those 4 places, plus getting rid of the controller folder worked 🎉 . Will create a PR!

[omichel]

The launcher adds this /System/Volumes/Data/Applications/Webots.app/Contents/lib/controller folder in the DYLD_LIBRAY_PATH, see https://github.com/cyberbotics/webots/blob/master/src/controller/launcher/webots_controller.c#L392 which works fine for the C/C++ versions. However, the Python driver uses a different path as seen in https://github.com/cyberbotics/webots/blob/master/lib/controller/python/vehicle/driver.py#L46. So, I guess the bug is there and we should remove the 'MacOS' folder from there. Can you check if that fixes the issue for you?

[SarvagyaVaish]

Yup. That should work for my system configuration. Not sure how to test it. Perhaps building from source?
Also, would removing MacOS from the path break any other system configs?

[omichel]

No, you don't need to build from sources, you can simply modify this driver.py file from your local Webots installation. It is located somewhere in the Webots.app bundle, I sure you will find it.

[SarvagyaVaish]

We'll need to update all of these locations, right?

/Applications/Webots.app/Contents/lib/controller/python/vehicle/car.py:
   42              path = os.path.join('lib', 'controller', 'car.dll')
   43          elif sys.platform == 'darwin':
   44:             path = os.path.join('Contents', 'MacOS', 'lib', 'controller', 'libcar.dylib')
   45          self.api = ctypes.cdll.LoadLibrary(os.path.join(os.environ['WEBOTS_HOME'], path))
   46          self.api.wbu_car_get_front_wheel_radius.restype = ctypes.c_double

/Applications/Webots.app/Contents/lib/controller/python/vehicle/driver.py:
   44              driver = 'driver.dll'
   45          elif sys.platform == 'darwin':
   46:             path = os.path.join('Contents', 'MacOS', 'lib', 'controller')
   47              car = 'libcar.dylib'
   48              driver = 'libdriver.dylib'

/Applications/Webots.app/Contents/MacOS/lib/controller/python/vehicle/car.py:
   42              path = os.path.join('lib', 'controller', 'car.dll')
   43          elif sys.platform == 'darwin':
   44:             path = os.path.join('Contents', 'MacOS', 'lib', 'controller', 'libcar.dylib')
   45          self.api = ctypes.cdll.LoadLibrary(os.path.join(os.environ['WEBOTS_HOME'], path))
   46          self.api.wbu_car_get_front_wheel_radius.restype = ctypes.c_double

/Applications/Webots.app/Contents/MacOS/lib/controller/python/vehicle/driver.py:
   44              driver = 'driver.dll'
   45          elif sys.platform == 'darwin':
   46:             path = os.path.join('Contents', 'MacOS', 'lib', 'controller')
   47              car = 'libcar.dylib'
   48              driver = 'libdriver.dylib'

[omichel]

We should probably get rid of this folder: /Applications/Webots.app/Contents/MacOS/lib/controller as it seems redundant...