[Distutils] Accessing tests_require and setup_requires from the setup.py

[Christopher Baines]

On 03/06/16 14:19, Paul Moore wrote:
> On 3 June 2016 at 13:20, Christopher Baines <mail at cbaines.net> wrote:
>> I'm trying to write a script to get information about a source
>> distributions requirements (from the source distribution), but I'm not
>> sure how to access the tests_require and setup_requires that can
>> sometimes be found in the setup.py?
>>
>> Apologies if this is really simple, and I've just missed the answer, but
>> I've searched for it a few times now, and not come up with anything.
> 
> If I understand what you're trying to achieve, the only way of getting
> the "final" information (i.e, what will actually get used to install)
> is by running the setup.py script. That's basically the key issue with
> the executable setup.py format - there's no way to know the
> information without running the script.
> 
> You may be able to get the information without doing a full install by
> using the "setup.py egg_info" subcommand provided by setuptools.
> That's what pip uses, for example (but pip doesn't look at
> tests_require or setup_requires, so you'd have to check if that
> information was available by that route).

As far as I can see (I checked setuptools and flake8), neither
tests_require or setup_requires are present in the egg_info metadata
directory.

Is there no way of getting setuptools to write the data out to a file?