Paths are hard to understand

[ledm]

There are several places in paths, where it's not clear where code, working directories, and so on live. It would be better to simply use a "work_dir", "image_dir", like ESMValTool path in the user config settings.

At the moment, we general paths from combining several paths, and it's not obvious:

    root_dir = _normalize_path(jasmin_paths["general"]["root_dir"])
    user = getuser()
    shelves_dir = jasmin_paths["general"]["shelvedir"]
    data_dir = jasmin_paths["general"]["ModelFolder_pref"]
    jasmin_paths["general"]["shelvedir"] = os.path.join(
        root_dir,
        data_dir,
        user,
        shelves_dir
    )
    p2p_dir = jasmin_paths["general"]["p2p_ppDir"]
    jasmin_paths["general"]["p2p_ppDir"] = os.path.join(
        root_dir,
        data_dir,
        p2p_dir
    )
    images_dir = jasmin_paths["general"]["imagedir"]
    jasmin_paths["general"]["imagedir"] = os.path.join(
        root_dir,
        data_dir, user,
        images_dir
    )

(from bgcval2/_runtime_config.py)
Also in: bgcval2/Paths/paths.py