[Distutils] setup_requires and install_requires

[Toby St Clere Smithe]

Daniel Holth <dholth at gmail.com> writes:
> Just build a wheel first. Then numpy is installed twice but only built once.

Sure -- but why isn't this automatic? This solution is a bit of a hack
around what seems a needless inefficiency!


Best,

Toby


> On May 24, 2014 12:16 PM, "Toby St Clere Smithe" <mail at tsmithe.net> wrote:
>
>> Hi Ralf,
>>
>> Ralf Gommers <ralf.gommers at gmail.com> writes:
>> > I wasn't actually.
>>
>> Well, I'm glad I could be of service, I guess. Should I report this as a
>> bug?
>>
>> >> but I wonder if there's any progress
>> >> for me to be aware of. I've got an extension that I build with
>> >> distutils. It requires numpy both to build and to run, so I have numpy
>> >> in both setup_requires and install_requires. Yet setup.py builds numpy
>> >> twice -- once for the build stage, and then again on installation. This
>> >> seems inefficient to me -- why not just build it once? Is this by
>> >> design?
>> >>
>> >
>> > Seems fairly inefficient, so I'd guess it's not by design.
>>
>> Indeed.
>>
>> > Note that if numpy is already installed, you may want to avoid adding the
>> > *_requires arguments in order not to silently upgrade or break the
>> > installed numpy. Something like
>> > https://github.com/scipy/scipy/pull/3566/files
>>
>> This is good advice, but what about the cases in which the build machine
>> is not the installation machine? I already have a versioned dependency,
>> which will on each possible machine (trivially) either be satisfied or
>> not, and if it's not, then it should be.
>>
>> Cheers,
>>
>> Toby
>>
>>
>> --
>> Toby St Clere Smithe
>> http://tsmithe.net
>>
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-- 
Toby St Clere Smithe
http://tsmithe.net