Status of per-target transitions/workarounds

[cbarrete]

We find ourselves writing quite a few wrapper rules that simply transition an underlying target's providers. The added boilerplate and rules are a little annoying, but the intermediary targets (which show up in buck2 targets) are causing the most confusion at the moment.

The docs state:

The Buck2 team is considering the implementation of per target transitions (that is, transitions referenced at a rule instantiation site as opposed to rule declaration site). No specific plans or APIs exists at the moment.

Is this still accurate? Is there something that the open source community could do to help move the needle?

Is something like #714 (comment) with a transition_dep and a wrapper macro that creates a dummy dep first the best workaround in the meantime?