[Python-Dev] PEP 552: deterministic pycs

[Antoine Pitrou]

On Thu, 07 Sep 2017 14:32:19 -0700
Benjamin Peterson <benjamin at python.org> wrote:
> > 
> > Not sure how common that situation is (certainly the source tree wasn't
> > read-only when you checked it out or untar'ed it), but isn't it easily
> > circumvented by copying the source tree before building?  
> 
> Well, yes, in these kind of "batch" build situations, copying is
> probably fine. However, I want to be able to have pyc determinism even
> when developing. Copying the entire source every time I change something
> isn't a nice.

Hmm... Are you developing from a read-only source tree?

> The larger point is that while the SOURCE_EPOCH patch will likely work
> for Linux distributions, I'm interested in being able to have
> deterministic pycs in "normal" Python development workflows.

That's an interesting idea, but is there a concrete motivation or is it
platonical?  After all, if you're changing something in the source tree
it's expected that the overall "signature" of the build will be
modified too.

Regards

Antoine.