[Bug Report] setup_conda_env.sh does not work for zsh

[BGDabyss]

I tried using bash after this comment — and finally, I saw the light at the end of the tunnel. So this issue might be caused by zsh.

I noticed there's already logic for handling zsh (i.e., if [ -n "$ZSH_VERSION" ]; then ...), but it doesn't seem to be working.

@kellyguo11 Hi, I have tried source ../IsaacSim/_build/linux-x86_64/release/setup_conda_env.sh, but still met the same error ModuleNotFoundError: No module named 'isaacsim'

(isaac)➜  IsaacLab git:(feature/isaacsim_5_0) ls -l ../IsaacSim/_build/linux-x86_64/release/setup_conda_env.sh
-rwxrwxr-x 1 aby aby 1586  Aug  3 16:32 ../IsaacSim/_build/linux-x86_64/release/setup_conda_env.sh

(isaac) ➜  IsaacLab git:(feature/isaacsim_5_0) source ../IsaacSim/_build/linux-x86_64/release/setup_python_env.sh

(isaac) ➜  IsaacLab git:(feature/isaacsim_5_0) ./isaaclab.sh -p scripts/reinforcement_learning/skrl/train.py --task Isaac-Ant-v0 --headless

[INFO] Using python from: /home/aby/anaconda3/envs/isaac/bin/python                                 
Traceback (most recent call last):
  File "/home/aby/sim5/IsaacLab/scripts/reinforcement_learning/skrl/train.py", line 18, in <module>
    from isaaclab.app import AppLauncher
  File "/home/aby/sim5/IsaacLab/source/isaaclab/isaaclab/app/__init__.py", line 15, in <module>
    from .app_launcher import AppLauncher  # noqa: F401, F403
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/aby/sim5/IsaacLab/source/isaaclab/isaaclab/app/app_launcher.py", line 26, in <module>
    from isaacsim import SimulationApp
ModuleNotFoundError: No module named 'isaacsim'

System Info

• Isaac Lab Version: feature/isaacsim_5_0 branch
• OS: Ubuntu 22.04
• GPU: NVIDIA RTX 5070Ti
• CUDA: 12.8
• GPU Driver: 570.133.07
• shell: zsh

Originally posted by @BGDabyss in #2706

[RandomOakForest]

Thanks for posting this. It is indeed. See our show-and-tell in #3021 for details on how to get a smooth installation set up.