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

[Paul Moore]

On 3 June 2016 at 14:24, Christopher Baines <mail at cbaines.net> wrote:
> 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?

Maybe you could write your own command class? Or monkeypatch
setuptools.setup() to write its arguments to a file?

I don't know of any non-ugly way, though, sorry...
Paul