Hello team 👋 ! I’m having a problem with sharing a

python_distribution

package across multiple resolves that need to use different python versions and different dependency version constraints. Let’s say I have the following: 1. 3rd-party dependency

foo

where I want to use v1 in python 3.8 and v2 in py3.9 2. Shared package

A

which should be compatible with both

foo==1

in py3.8 and

foo==2

in py3.9 3. Package

B

which depends on

A

, but only needs to run in py3.8 with

foo==1

4. Package

C

which depends on

A

, but only needs to run in py3.9 with

foo==2

So far, I have been able to get this to work by: 1. Creating 2 different

python_requirements

targets: a. with

foo==1

b. with

foo==2

2. Creating 2 different

python_distribution

targets for `A`: a. Name

a-38

with

interpreter_constraints=[">=3.8,<3.9"]

b. Name

a-39

with

interpreter_constraints=[">=3.9,<3.10"]

3. Use resolve

b

for

B

with

interpreter_constraints=[">=3.8,<3.9"]

4. Use resolve

c

for

C

with

interpreter_constraints=[">=3.9,<3.10"]

but this is not ideal because it requires publishing 2 different packages for

A

. What I wish would work looks more like: 1. Create 1

python_requirements

targets with requirements conditioned on the python interpreter a.

foo==1; python_version < 3.9

b.

foo==2; python_version >= 3.9

2. Create 1

python_distribution

target for

A

where

interpreter_constraints=[">=3.8,<3.10"]

3. Use resolve

b

for

B

with

interpreter_constraints=[">=3.8,<3.9"]

4. Use resolve

c

for

C

with

interpreter_constraints=[">=3.9,<3.10"]

However, whenever I try this, I get an error

InvalidFieldException: The target root/A@resolve=b has the `interpreter_constraints` ('>=3.8,<3.10',), which are not a subset of the `interpreter_constraints` of some of its dependencies:

* ('CPython>=3.8,<3.9',): root/B/__init__.py:../lib@resolve=b

It looks like every target must have

interpreter_constraints

that are a subset of every

resolve

that it belongs to. Is the 1st scenario that I describe the correct way to manage this situation? Is there anyway to make use of conditional constraints to publish only 1

A

?