Is there a way to make

pants run

function as

poetry run

would, or am I attacking the problem from the wrong angle? E.g. I want to start

prefect

which is as simple as running

poetry run prefect server start

, however

pants run //:root#prefect -- server start

does not yield the same result and throws an error

ImportError: No module named prefect.__main__; 'prefect' is a package and cannot be directly executed

. I really enjoyed this feature of Poetry when debugging stuff locally and testing out new packages and am hoping for an alternative that is pants-native.

Is the target a

pex_binary

? If so have you set

execution_mode="venv"

?

No, I should have clarified. I've only added the package to my dependencies and generated the lockfiles. The target here is the dependency definition from the

poetry_requirements

(haven't migrated away from Poetry just yet).

You'll need a

pex_binary

binary target with that as a manual dep and a script="prefect", like ~so:

pex_binary(
    name="foo",
    dependencies=["//:root#prefect],
    script="prefect",
    execution_mode="venv"
)

The

execution_mode

may not be needed, but is generally a good idea for maximum compatibility with the wider Python ecosystem of tools. You then

pants run

this new target.

Amazing! That works as I would expect!

... or

pants export

and then activate the exported venv in

dist/...

and go about normal venv business.

Yeah, I thought about that one as well, but it felt like a very long way for a short drink of water. Nice to know that it's possible nonetheless. Really enjoying the flexibility of Pants