def _set_default_config(env, install_dir, sym_dir_name="default"):
    version = env["tool_version"]
    if env.safe_exists(install_dir):
        install_dir_root = "%s/.." % install_dir
        sym_dir = "%s/%s" % (install_dir_root, sym_dir_name)
        replace_default = False
        if not env.safe_exists(sym_dir):
            replace_default = True
        if not replace_default:
            default_version = env.safe_sudo("basename `readlink -f %s`" % sym_dir)
            if version > default_version:  # Bug: Wouldn't work for 1.9 < 1.10
                print "default version %s is older than version %s just installed, replacing..." % (default_version, version)
                replace_default = True
        if replace_default:
            env.safe_sudo("rm -rf %s; ln -f -s %s %s" % (sym_dir, install_dir, sym_dir))
Sets up default galaxy config directory symbolic link (if needed). Needed
dataset/ETHPy150Open chapmanb/cloudbiolinux/cloudbio/custom/shared.py/_set_default_config