Any way to make plz build --rebuild also build the dependencies of a target?

[leviplj]

My plz targets look like:

//dockerfiles/python:alpine
  deps = none
//dockerfiles/python:with-pandas
  deps = //dockerfiles/python:alpine
//dockerfiles/app:app
  deps = //dockerfiles/python:with-pandas

I've got 3 scenarios.
Scenario 1:

• build all images using plz build //dockerfiles/...
• delete app image using docker image rm app:version
• rebuild app image using plz build --rebuild //dockerfiles/app:app
  This scenario works fine for me. //dockerfiles/app:app depends on //dockerfiles/python:with-pandas and the later wasn't deleted.

Scenario 2:

• build all images using plz build //dockerfiles/...
• delete all images and cache using docker system prune -af
• rebuild app image using plz build --rebuild //dockerfiles/app:app
  This scenario doesn't work. //dockerfiles/app:app depends on //dockerfiles/python:with-pandas and that was deleted on step 2 of this scenario.

Scenario 3:

• build all images using plz build //dockerfiles/...
• delete all images and cache using docker system prune -af
• run plz clean
• rebuild app image using plz build [--rebuild] //dockerfiles/app:app
  This scenario works. As I cleaned plz's cache, it'll rebuild all dependencies of //dockerfiles/app:app.

I need to find a solution for Scenario 2. Is there a way to force plz to rebuild a target and its dependencies tree without using plz clean?
Scenario 3 "solves" the problem but I don't want to use it as I have more then just the 3 images on this example.

[peterebden]

This feels like you're using Please targets in the wrong way. If you need to force rebuilds of a large number of actions across the repo, that implies you're relying on them having side-effects (which builds against a system Docker daemon do). Please is designed to be a caching build system that can optimise builds by choosing not to re-run actions, and it can't know about stuff you're doing to your system Docker daemon.

There are alternative methods out there about how Docker builds can work. I'm not sure what we have out in the wild though.