Hi all, is this the best practice for building and running Docker images using Pants on both mac and linux? What we tried: • Create BUILD files and Dockerfile for multi-stage build leveraging 2 PEXs • Generate a

complete_platforms

file on linux following this guide

docker run --entrypoint='/bin/sh' -it --platform linux/amd64 --rm python:3.10-slim -c "python -m pip install pex >/dev/null 2>&1 && pex3 interpreter inspect --markers --tags --indent=2" > linux_amd64_py310.json

• Add

file

target to BUILD file for PEX binaries like

file(
    name="linux_amd64_py310",
    source="linux_amd64_py310.json",
)

• Add

complete_platforms=[":linux_amd64_py310"]

to

pex_binary

target args • Add

build_platform=["linux/amd64"]

to

docker_image

target args Note: We only need to create the image for a single platform (eg

linux/amd64

) but we would like to be able build the image and run the container locally on both mac and linux. We will also build the image as part of CI.

that's basically what we do, although we build the PEX for both amd64 and arm64 so that the docker image can run natively on apple silicon macs (https://github.com/pantsbuild/pants/discussions/18756 is an old description of that)

Great, thank you! Appreciate the reply.