Hi! I have a python repo and I want to build a docker image in 2

RUN

steps: first install all the third party dependencies and then install the first party code. Pants supports

pex_binary

so I tried it, but it builds a docker image in one

RUN

step which is not docker layer cache friendly and it builds third party dependencies every time I change first party code.

pex_binary

target also has

include_requirements

and

include_sources

arguments, but I'm not sure how to use them, shall I create 2 targets - one for requirements and one for sources? So my question is - how can I avoid rebuilding third party dependencies on every first party code change?

Checkout this blog post: https://blog.pantsbuild.org/optimizing-python-docker-deploys-using-pants/

Thanks!