how to set config path except change $HOME

sh is run by nobody. $HOME is "/".

python2 /usr/local/google-cloud-sdk/google-cloud-sdk/bin/bootstrapping/gsutil.py version -l

ERROR: (gsutil) Could not create directory [/.config/gcloud]: Permission denied.

Start with the gsutil.py entry point and investigate how gsutil determines its configuration directory when HOME is "/". Reproduce the command as the nobody user and identify whether a supported writable config path can be selected without changing HOME; done means the command runs without the permission error.

Written by the indexing model from the issue text.