Is there a way to parametrize such that 2 fields change but Pants #general

Is there a way to parametrize such that 2 fields c...

proud-dentist-22844

03/31/2023, 1:08 AM

Is there a way to parametrize such that 2 fields change, but without producing a cartesian product of the two fields? ie, the docs say (https://www.pantsbuild.org/v2.16/docs/targets#parametrizing-targets):

If multiple fields are parametrized, a target will be created for each value in the Cartesian product, with
,
as the delimiter in the address. See the next example.

But, I want to parametrize two

pex_binary

fields:

interpreter_constraints

and

output_path

. I want to use the named interpreter constraint in the

output_path

. So, IC

py36

has

output_path="st2-py36.pex"

I tried the following, but that (of course) did the Cartesian product which does not make sense:

Copy code

pex_binary(
    ...
    interpreter_constraints=parametrize(
        py36=["CPython==3.6.*"],
        py37=["CPython==3.7.*"],
        py38=["CPython==3.8.*"],
    ),
    output_path=parametrize(
        py36="st2-py36.pex",
        py37="st2-py37.pex",
        py38="st2-py38.pex",
    ),
)

proud-dentist-22844

03/31/2023, 1:13 AM

Well, I suppose a for loop works:

Copy code

_ics = dict(
    py36=["CPython==3.6.*"],
    py37=["CPython==3.7.*"],
    py38=["CPython==3.8.*"],
)
for ic_name, ic in _ics.items():
    pex_binary(
        name=f"st2-{ic_name}",
        output_path=f"st2-{ic_name}.pex",
        interpreter_constraints=ic,
        ...
    )

It doesn't look as clean as

parametrize

. But it seems to work.

curved-television-6568

03/31/2023, 2:14 PM

see you found https://github.com/pantsbuild/pants/issues/18292, posting here for completeness/posterity

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