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Ran 27 Dec 2025 03:20AM UTC

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Committed 27 Dec 2025 02:49AM UTC coverage: 49.735% (-0.04%) from 49.776%

Job # 20533309613.12

Build Type

push

github

Committed by

web-flow

Commit Message

partition protobuf targets for dependency inference using any "resolve-like" fields (#21918)

## Background

As reported in https://github.com/pantsbuild/pants/issues/21409,
protobuf dependency inference cannot handle resolve-like fields which
are attached to `protobuf_source` target types by plugins. Basically,
multiple targets own the same source file but in different resolves, but
the existing code does not know about resolves and thus has no way to
partition the targets into distinct groups and apply dependency
inference within each group.

## Solution

Partition the protobuf targets by any "resolve-like" field found
registered on a `protobuf_source` target. The new `ResolveLikeField`
mix-in is used to detect fields which are "resolve like." The dependency
inference logic then uses the new `ResolveLikeFieldToValueRequest` union
to query the applicable language backend for what the actual resolve
name is so it can be used for partitioning.

The Python and JVM backends support `ResolveLikeField`.

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