[Distutils] Fwd: Re: PEP 517 again

xoviat xoviat at gmail.com
Thu Aug 24 14:20:58 EDT 2017

To be clear, is everyone okay with the following?

build_wheel(wheel_directory, config_settings=None,
metadata_directory=None): [REQUIRED]
build_wheel_incremental(wheel_directory, config_settings=None,
metadata_directory=None): [OPTIONAL]

I still think that the frontend should not provide a build_directory, but
if someone *really* wants the build_directory in the incremental function,
then I will "disagree and commit."

2017-08-24 13:13 GMT-05:00 Thomas Kluyver <thomas at kluyver.me.uk>:

> On Thu, Aug 24, 2017, at 06:20 PM, Daniel Holth wrote:
> On Thu, Aug 24, 2017 at 12:34 PM Thomas Kluyver <thomas at kluyver.me.uk>
> wrote:
> Is there a reason to ask for an 'unclean' build, though? There may be a
> performance optimisation from reusing cached data,
> For the same reason you would ever ask for incremental builds, to more
> quickly iterate while hacking, imagining that you are using the PEP 517
> interface to develop, perhaps to have a uniform interface to patch
> something when you are not familiar with exactly the build system it uses.
> Yup, this is what I meant about using cached data for performance. But I
> don't think this requires builds to modify the source directory. The build
> system can cache data elsewhere on the filesystem, whether or not it's
> given an explicit build_directory.
> I think we can specify one kind of build that is both 'clean' (doesn't
> modify the source directory) and incremental (can use cached data to speed
> up the build). If that's workable, it seems like it would save a lot of
> headaches rather than trying to specify them as two different options.
> We have explicitly excluded editable installs (i.e. inplace builds) from
> this PEP, though we can add a hook for that in a later PEP. I agree with
> you that this PEP should allow for fast incremental (but non-inplace)
> builds if possible, though.
> Thomas
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