Hi, would it be possible to maintain multiple poetry based (i.e. multiple

pyproject.toml

) python projects using multiple lockfiles "resolves"? I guess the issue could be if these projects have some common third party dependencies. We have a monorepo but it contains multiple python packages generated using poetry which have their own dependencies.

You should be able to use Pants' 2.10 or greater "multiple resolves" feature. https://www.pantsbuild.org/docs/python-third-party-dependencies#user-lockfiles

yeah that's what prompted me to ask here, but as it's mentioned

If you want the same requirement to show up in multiple resolves, you currently need to create a distinct target per resolve. This will be improved in Pants 2.11 through a new

parametrize()

mechanism.

I suppose this is yet to be added to 2.11 though.

I think it might be in, but It's cutting edge (so possibly not yet documented)

it's added in 2/11, just not documented. my goal for this weeek is to update 2.11 docs

# src/py/utils/BUILD

python_sources(
    # The files in this folder can be used with both resolves.
    #
    # This `parametrize` mechanism is added in Pants 2.11. In
    # Pants 2.10, you can explicitly create multiple targets.
    resolve=parametrize("data-science", "web-app"),
)

@hundreds-father-404 How does this work? If I have say

pandas

defined as a dependency in both

data-science

and

web-app

, putting the

parameterize

line will make sure to just generate one target associated with

pandas

?

parametrize creates one target per param: src/py/utils/f.py@resolve=data-science src/py/utils/f.py@resolve=web-app run ./pants list or peek to see that a target only infers deps from the same resolve, so it should Just Work. note you only need to use parametrize when code needs to work w/ multiple resolves

So if

pandas

is defined in both

data-science

and

web-app

, I only need to use one of the resolves from

data-science

and

web-app

where

pandas

is a 3rd party dependency?

fwiw, there are docs for

parametrize

in 2.11: https://www.pantsbuild.org/v2.11/docs/targets#parametrizing-targets … but they’re not specific to this usecase