Allow layers in tach.domain.toml

[shashanktomar]

The layers are not supported in tech.domain.toml file. In a monorepo setup, each module can have different type of layers, so this feature will be really helpful.

[emdoyle]

Hi @shashanktomar , thanks for raising this. I agree that scoped layers makes sense.

I'm curious about your expectations in a couple cases:

• if you define layers in a root tach.toml, then re-define them in tach.domain.toml, would you expect that the modules within the domain can refer only to the domain's layers? or to both layers?
• also, if I define layers in a tach.domain.toml, would you expect that other domains can refer to these layers?
• how would you want to define layers between domains? e.g. would you still expect to be able to say 'this domain is in the "product" layer' and 'this domain internally has layers A, B, C'?

My assumption would be that the layers in tach.domain.toml essentially 'shadow' the outer layers, but to support layering the domains themselves, there might need to be additional syntax. Let me know your thoughts!