pip.md

pip freeze | grep -v "pkg-resources" | sort > freezed-requirements.txt

truncate -s 0 hashed-reqs.txt

while read p do echo "$p" hashin "$p" --requirements-file=hashed-reqs.txt done < freezed-requirements.txt

https://pip.pypa.io/en/stable/user_guide/#repeatability

https://pip.pypa.io/en/stable/reference/pip_install/#hash-checking-mode

https://stackoverflow.com/questions/39577984/what-is-pkg-resources-0-0-0-in-output-of-pip-freeze-command

https://github.com/peterbe/hashin