How do you copy a Python file when building a Docker image? I get this message:

The following files were not found in the Docker build context:
  * src/python/some_package/some_file.py

you want it to show up as a loose file, right? THe answer is not very satisfying and @bitter-ability-32190 has been exploring how to improve it In the meantime, keep the

python_sources

targets, but also add a

file

target like this:

file(
  name="some_file-file-tgt",
  source="some_file.py",
)

name

can be what you want. Then I think dependency inference should pick it up

Currently, the Docker plugin doesn't consider any

_source

target when constructing the sandbox. Generally it is assumed you'd be first packaging into a

pex_binary

. (FWIW I have a proposal hoping to shift the paradigm here)

Currently, the Docker plugin doesn't consider any _source target when constructing the sandbox.

It considers

file

targets

Right, that's not a

_source

target 🙈

Ha ok, I'll try the

file

target...

Great! @rhythmic-glass-66959 any thoughts on how we could better document this? https://www.pantsbuild.org/docs/docker

Well, maybe add a warning admonition saying that the

python_sources

target won't work for copying Python files. And also, an example in the example-docker repository would be helpful.