[Distutils] Fwd: Re: PEP 517 again

[Daniel Holth]

build_dir:

bdist_wheel sometimes has a problem with unclean builds. admittedly this
could be fixed.
pip copies entire source tree, including unclean build/ directory, to tmpdir
bdist_wheel runs in tmpdir, including copied leftover build/ data in wheel

by including the build_dir parameter, a nearly universal build system
concept, pip gets an elegant way to ask for either a clean or unclean build.

sdist optional:

enscons can use .hg manifest instead of MANIFEST.in. what is this git
nonsense?
user has decided to build from an unpacked sdist
impossible to create new sdist from unpacked sdist



On Thu, Aug 24, 2017 at 11:49 AM xoviat <xoviat at gmail.com> wrote:

> If the entire idea of copying out-of-tree is to work around setuptools
> deficiencies, then perhaps it would be a better idea to push this onto the
> setuptools build backend rather than bring these problems into PEP 517?
>
> 2017-08-24 10:32 GMT-05:00 xoviat <xoviat at gmail.com>:
>
>> May I ask what is wrong *in principle* with the setuptools "build" folder
>> (other than the fact that it does not contain all tree changes)?
>>
>> 2017-08-24 10:27 GMT-05:00 xoviat <xoviat at gmail.com>:
>>
>>> That is actually the first time that build_dir makes sense to me now.
>>> Thank you.
>>>
>>> 2017-08-24 10:24 GMT-05:00 Paul Moore <p.f.moore at gmail.com>:
>>>
>>>> On 24 August 2017 at 16:20, xoviat <xoviat at gmail.com> wrote:
>>>> >>  I *do* care about telling backends we don't want "different
>>>> > results from those that would be obtained by exporting an sdist
>>>> > first".
>>>> >
>>>> > I completely agree with this statement, but I don't believe that it
>>>> can or
>>>> > should be accomplished with this parameter. Let me just quote the
>>>> process
>>>> > that I proposed:
>>>> >
>>>> >
>>>> >> Proposed process:
>>>> > - Frontend copies source tree to temporary directory
>>>>
>>>> That step's the problem. If the frontend does that it can potentially
>>>> be copying a lot of unneeded stuff (VCS history, for example). We
>>>> tried that with pip and it was a major issue. That problem is the
>>>> *whole point* of all the discussions about the various proposals that
>>>> ended up with build_tree.
>>>>
>>>> > - Frontend invokes build-sdist to build an sdist
>>>> > - Frontend extracts sdist to new temporary directory
>>>> > - Frontend reloads backend from sdist directory and invokes
>>>> build-wheel
>>>>
>>>> Paul
>>>>
>>>
>>>
>>
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