On Tue, Aug 30, 2016, at 05:51 PM, Antony Lee wrote: > I am not really a fan of PEP518 in general. Basically, the idea of > setup.py is that declarative languages are not sufficient to express a > build system (and AFAICT this is always going to be the case for > expressing, say, compiler flags for extensions), so I'd rather just > accept that and stick everything in setup.py instead of adding more > parameter files. What if someone wants dynamic build dependencies?
Dynamic build deps aren't precluded - the idea is that the build system can discover additional dependencies when it runs, while the static build- system field specifies just what's required to run the build system itself. However, the build system interface was split out into separate PEPs (517 & 516 are alternatives) to allow 518 to go forwards. I take totally the opposite view: we should make as much metadata as possible declarative, even though we know we can't define a totally general build system with purely declarative information.
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