Fixes rl_games workflow's log_root_path to be the absolute path

[ozhanozen]

Description

Due to previous changes, the rl_games workflow's log_root_path is no longer the absolute path if the pbt option is not used, causing further issues. This PR fixes this by making it an absolute path again.

Fixes #3530

Type of change

• Bug fix (non-breaking change which fixes an issue)

Screenshots

Before:

IsaacLab/scripts/reinforcement_learning/rl_games/train.py

Lines 129 to 135 in 3a0db9d

	log_root_path = os.path.join("logs", "rl_games", config_name)
	if "pbt" in agent_cfg:
	if agent_cfg["pbt"]["directory"] == ".":
	log_root_path = os.path.abspath(log_root_path)
	else:
	log_root_path = os.path.join(agent_cfg["pbt"]["directory"], log_root_path)

After:

log_root_path = os.path.join("logs", "rl_games", config_name)
if "pbt" in agent_cfg and agent_cfg["pbt"]["directory"] != ".":
    log_root_path = os.path.join(agent_cfg["pbt"]["directory"], log_root_path)
else:
    log_root_path = os.path.abspath(log_root_path)

Note

While this fixes the path to be absolute when pbt is not used, I am not sure if

log_root_path = os.path.join(agent_cfg["pbt"]["directory"], log_root_path)

is correct or absolute, as I do not use pbt. Should it not be something like the following?

log_root_path = os.path.abspath(os.path.join(log_root_path, agent_cfg["pbt"]["directory"]))

I would appreciate any feedback on this.

Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there

[garylvov]

LGTM!

[ozhanozen]

Hi @ooctipus, would love to get your opinion before merging on the line:
log_root_path = os.path.join(agent_cfg["pbt"]["directory"], log_root_path)
so we are sure that the pbt log directory is also correct.