Fix pip install from tarball

[jpic]

Currently, this works pip install -e git+https://github.com/Spredzy/python-c14.git#egg=c14

This PR also enables python setup.py upload to produce an uploaded file that will work with pip install c14, which otherwise results in quite some pain:

jpic@mrs-staging:~$ pip install --user c14
Collecting c14
  Downloading https://files.pythonhosted.org/packages/c3/e7/555a5a9b49fa703418251a7088fb0ad65a90afb6192725348fb175e870ff/c14-0.0.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-DLsfHq/c14/setup.py", line 21, in <module>
        from c14 import version
      File "c14/__init__.py", line 18, in <module>
        import slumber
    ImportError: No module named slumber
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-DLsfHq/c14/
jpic@mrs-staging:~$ pip install --user slumber
Collecting slumber
  Using cached https://files.pythonhosted.org/packages/9c/53/8e2cb7501c17f9367b02a8ce62cb463824f9c5f7884e4fe6c5f13cb79858/slumber-0.7.1-py2-none-any.whl
....
Installing collected packages: urllib3, certifi, chardet, idna, requests, slumber
Successfully installed certifi-2018.11.29 chardet-3.0.4 idna-2.8 requests-2.21.0 slumber-0.7.1 urllib3-1.24.1
jpic@mrs-staging:~$ pip install --user c14
Collecting c14
  Using cached https://files.pythonhosted.org/packages/c3/e7/555a5a9b49fa703418251a7088fb0ad65a90afb6192725348fb175e870ff/c14-0.0.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-MN9k8m/c14/setup.py", line 51, in <module>
        install_requires=_get_requirements(),
      File "/tmp/pip-build-MN9k8m/c14/setup.py", line 27, in _get_requirements
        with open(requirements_path, 'r') as f:
    IOError: [Errno 2] No such file or directory: '/tmp/pip-build-MN9k8m/c14/requirements.txt'
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-MN9k8m/c14/

The approach taken by this patch is to remove boilerplate and let setupmeta do the work.

[jpic]

Demonstration, python setup.py explain:

jpic@mrs-staging:~/python-c14$ python setup.py explain
running explain
                       author: (explicit             ) Yanis Guenane
                 author_email: (explicit             ) yanis@guenane.org
                 bugtrack_url: (auto-fill            ) https://github.com/Spredzy/python-c14/issues
                  classifiers: (explicit             ) 6 items: ["Environment :: Console", "Intended Audience :: Developers", "...
                  description: (README.rst:1         ) C14 Python Wrapper
         include_package_data: (explicit             ) True
             install_requires: (requirements.txt     ) ["slumber"]
                      license: (auto-fill            ) Apache 2.0
             long_description: (README.rst           ) C14 Python Wrapper ================== This module is a python wrapper ar...
long_description_content_type: (README.rst           ) text/x-rst
                         name: (explicit             ) c14-jpic-test
                     packages: (explicit             ) ["c14"]
               setup_requires: (explicit             ) setupmeta
                tests_require: (test-requirements.txt) ["flake8", "pep8", "tox"]
                          url: (explicit             ) https://github.com/Spredzy/python-c14
                      version: (c14/__init__.py:21   ) 0.0.2

Building and uploading work the same. But as a result, pip install works:

jpic@mrs-staging:~/python-c14$ pip install --user c14-jpic-test
Collecting c14-jpic-test
  Downloading https://files.pythonhosted.org/packages/c9/b5/9109979be99923ac7b40dc611015830fac1a0852b0dec02fde08ed467a36/c14-jpic-test-0.0.2.tar.gz
Building wheels for collected packages: c14-jpic-test
  Running setup.py bdist_wheel for c14-jpic-test ... done
  Stored in directory: /home/jpic/.cache/pip/wheels/e6/06/47/162c232b5a6719ec7f78a6e24349bb4e587f6bb16a012a35c8
Successfully built c14-jpic-test
Installing collected packages: c14-jpic-test
Successfully installed c14-jpic-test-0.0.2

The PR will work as-is.

But, if you want to, like me, test with another package namespace then you will need to hardcode packages as such:

jpic@mrs-staging:~/python-c14$ git diff
diff --git a/setup.py b/setup.py
index ca52ef8..37316bd 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,8 @@ import setuptools
 
 
 setuptools.setup(
-    name='c14',
+    name='c14-jpic-test',
+    packages=['c14'],
     setup_requires='setupmeta',
     author='Yanis Guenane',
     author_email='yanis@guenane.org',

Njoy