https://github.com/pantsbuild/pants/pull/17334 got a makeover and is now a PR adding a

per_platform

object 👀 It's usage right now is scoped to asset's sources field, specifically for

http_source

objects:

file(
    source=per_platform(
        linux_x86_64=http_source(...),
        linux_arm64=http_source(...),
    )
)

⚠️ One warning (also in the docstring) ⚠️ This SHOULD NOT be used today for the

source

field for a source file. Otherwise we'd (implicitly through dep inference) have platform-dependent dependency graphs, which the engine doesn't support. (It technically could, and maybe will, for targets WITHOUT a dependency field, but the blanket statement is a very fair warning)