[Distutils] Telling distutils about requirements

[Daniel Holth]

This is a common mistake. The parenthesis are a Metadata 1.2+ thing. Omit
them for distutils.


On Mon, Feb 11, 2013 at 2:22 PM, Erik Bernoth <erik.bernoth at gmail.com>wrote:

>
> On Mon, Feb 11, 2013 at 8:07 PM, Daniel Holth <dholth at gmail.com> wrote:
>
>> On Mon, Feb 11, 2013 at 1:10 PM, Erik Bernoth <erik.bernoth at gmail.com>wrote:
>>
>>> Hi everybody,
>>>
>>> I think I pretty much read all of the
>>> http://docs.python.org/2/distutils/ and started to create a pypi
>>> repository for my project (http://pypi.python.org/pypi/monk_tf). Now
>>> there are some things that are not so clear from the documentation, with
>>> the most important being requirement handling.
>>>
>>> I have the same requirements written down in two ways:
>>>  a) a requirements.txt file, which can be called with pip install -r
>>> requirements.txt. Yet I don't see any user downloading a requirements.txt
>>> file from somewhere, then installing it and only then afterwards getting
>>> started with actually installing the package they want to install. Who
>>> would do that?
>>>
>>>  b) requires attribute in the setup function call in setup.py. For some
>>> reason pip completely seems to ignore it. I tested the following way (come
>>> along with the code from https://github.com/DFE/MONK, if you like):
>>>
>>>     $ cd MONK
>>>     $ python setup.py sdist
>>>     $ cd dist
>>>     $ tar xfvz monk_tf-v0.1.1.tar.gz
>>>     $ cd monk_tf-v0.1.1
>>>     $ python setup.py install
>>>     running install
>>>     running build
>>>     running build_py
>>>     running install_lib
>>>     running install_egg_info
>>>     Writing
>>> /usr/local/lib/python2.7/dist-packages/monk_tf-v0.1.1.egg-info
>>>     $python
>>>     >> import monk_tf
>>>     (Exception, because a required package can't be found)
>>>
>>> So this also didn't seem to install any of the required packages.
>>>
>>> I'd really like to know, what I am doing wrong here. Anybody ideas or
>>> suggestions? Is there another way to tell distutils about the packages that
>>> should be installed before my package is installed?
>>>
>>> Cheers
>>> Erik
>>>
>>
>> Generally requires.txt is for specific versions of dependencies and the
>> setup.py list is more permissive.
>>
>> Try using pip to install your sdist instead of running setup.py directly.
>>
>>
> Hi Daniel,
>
> I also tried ``pip install monk_tf-v0.1.1.tar.gz``, with the same result
> as using setup.py directly. He installs it but doesn't consider the
> "requires" list.
> From your mail I would interprete that distutils actually should consider
> the required packages? Maybe I just wrote something incorrectly.
> Does the following look like a correct statements of the requires
> parameter?
> --------------------------------------------------------------
>   [...]
>     package_dir = { '' : src_path },
>     requires = [
>         'pylibssh2 (==1.0.1)',
>         'pyserial (==2.5)'
>     ],provides = [
>         '{} ({})'.format(project, version)
>     ]
>   [...]
> --------------------------------------------------------------
>
> Cheers
> Erik
>
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