Would it be correct to not rebuild the engine in CI if no ru

Question

Would it be correct to not rebuild the engine in CI if no rust code has changed

aloof-angle-91616 · Answer

if we change python versions or we change any of the declared externs in `native py` specifically

happy-kitchen-89482 · Answer

OK we can detect all those things

aloof-angle-91616 · Answer

yes

average-vr-56795 · Answer

Specifically this code computes a cache key for the native engine code <https github com pantsbuild pants blob f3304438dbbc32ec41a36bc2c0ad9af95175a7c5 build support bin native bootstrap code sh L38 L59>

average-vr-56795 · Answer

So a reasonable answer could be to keep exactly the most recent file in ~ cache pants bin native engine in the travis cache which we should reliably hit if nothing changed