First-party Python dependencies in different resolves

[d-m]

Is it possible to have a first party Python dependency built with a different resolve? We have two services,

• service1
• service2

They each have their own resolves, so that when service1 updates its version of FastAPI, for example, it doesn't trigger a change in service2.

service1 also contains some shared code that service2 depends on. When trying to set up the dependency directly in Pants, it gives an error:

09:45:37.50 [WARN] Pants cannot infer owners for the following imports in the target service1/file.py:

  * dependency 1
  * dependency 2
  * dependency 3

If you do not expect an import to be inferrable, add `# pants: no-infer-dep` to the import line. Otherwise, see https://www.pantsbuild.org/2.25/docs/using-pants/troubleshooting-common-issues#import-errors-and-missing-dependencies for common problems.
09:45:37.52 [WARN] The target service2/file.py imports `third party dependency`, but Pants cannot safely infer a dependency because more than one target owns this module, so it is ambiguous which to use: ['service2#dependency', 'service1#dependency'].

Please explicitly include the dependency you want in the `dependencies` field of service2/file.py, or ignore the ones you do not want by prefixing with `!` or `!!` so that one or no targets are left.

Alternatively, you can remove the ambiguity by deleting/changing some of the targets so that only 1 target owns this module. Refer to https://www.pantsbuild.org/2.25/docs/using-pants/troubleshooting-common-issues#import-errors-and-missing-dependencies.

I tried to create a python_distribution target for service1 and have service2 depend on that but it resulted in:

Engine traceback:
  in `test` goal

NoCompatibleResolveException: The target service2/file.py uses the `resolve` `service2`, but some of its dependencies are not compatible with that resolve:

  * src/service1/file.py (service1)
  * ....
  * ....

All dependencies must work with the same `resolve`. To fix this, either change the `resolve=` field on those dependencies to `service2`, or change the `resolve=` of the target src/service2/file.py. If those dependencies should work with multiple resolves, use the `parametrize` mechanism with the `resolve=` field or manually create multiple targets for the same entity.

For more information, see https://www.pantsbuild.org/2.25/docs/python/overview/lockfiles#multiple-lockfiles.

Is there a way to do this? Alternatively, is this just a really bad idea?