New discussion on a proposed design doc for adding a

__defaults__

construct in BUILD files: https://github.com/pantsbuild/pants/discussions/15809

Ohhh I like this a lot, that you use a specific construct rather than a

python_sources

target overriding a

python_sources

target etc. There is still only one target owner per entity FYI this is similar to the

overrides

proposal https://docs.google.com/document/d/1bcQRJazx6ODKc0PZRUgPx_bqHc6XurpBawTMD2zhtAk/edit. I like this a lot more because the semantics are so clear: this solely impacts the default

Thanks. Yea saw the similarities with overrides as well.

love this, we’re using macros to propagate defaults to different areas of the codebass, this would help getting rid of them

Yeah super duper strong +10 from me 😭

+100 from me. You avoid all the concerns I had with prior proposals for hierarchical metadata. The main thing I love is this only changes the default value; and you aren't creating any new targets

this is really exciting! will try to take a look this afternoon.