Git-Cola "icons_dir" prototype ( absolute + ~/.config/git-cola/icons check )

icons.py

def icon_dir(theme=None):
    """Return the path to the style dir within the cola install tree."""
    if theme:
        theme_final_dir = None
        theme_absolute_dir = None
        try:
            theme_absolute_dir = os.path.expanduser(theme)
            theme_final_dir = os.path.isdir(theme_absolute_dir)
        except TypeError:
            pass
        if theme_final_dir:
            return theme_final_dir
        theme_home_dir = config_home('icons', theme)
        theme_share_dir = share('icons', theme)
        if os.path.isdir(theme_home_dir):
            return theme_home_dir
        elif os.path.isdir(theme_share_dir):
            return theme_share_dir
        else:
            return share('icons')
    else:
        return share('icons')