Fix setup.py to work without six installed.

Sadly setup_requires is evil, but what are we doing to do?

Change-Id: I4c7ac659c73dc51cf213763a79c9b38e621a8d45

.travis.yml

@@ -19,8 +19,8 @@ matrix:
       env: JINJA_REQ="jinja2<2.7, Pygments<2.0"
 
 install:
-  - pip install -q --use-mirrors fixtures extras python-mimeparse $JINJA_REQ sphinx unittest2
-  - python setup.py -q install
+  - pip install fixtures $JINJA_REQ sphinx
+  - python setup.py install
 
 script:
   - python -m testtools.run testtools.tests.test_suite

NEWS

@@ -10,6 +10,10 @@ NEXT
 Changes
 -------
 
+* Fixed our setup.py to use setup_requires to ensure the import dependencies
+  for testtools are present before setup.py runs (as setup.py imports testtools
+  to read out the version number). (Robert Collins)
+
 * Support setUpClass skipping with self.skipException. Previously this worked
   with unittest from 2.7 and above but was not supported by testtools - it was
   a happy accident. Since we now hard depend on unittest2, we need to invert

setup.py

@@ -56,6 +56,16 @@ def get_long_description():
         os.path.dirname(__file__), 'doc/overview.rst')
     return open(manual_path).read()
 
+# Since we import testtools in setup.py, our setup requirements are our install
+# requirements.
+deps = [
+    'extras',
+    # 'mimeparse' has not been uploaded by the maintainer with Python3 compat
+    # but someone kindly uploaded a fixed version as 'python-mimeparse'.
+    'python-mimeparse',
+    'unittest2>=0.8.0',
+    ]
+
 
 setup(name='testtools',
       author='Jonathan M. Lange',
@@ -77,11 +87,6 @@ setup(name='testtools',
         ],
       cmdclass=cmd_class,
       zip_safe=False,
-      install_requires=[
-        'extras',
-        # 'mimeparse' has not been uploaded by the maintainer with Python3 compat
-        # but someone kindly uploaded a fixed version as 'python-mimeparse'.
-        'python-mimeparse',
-        'unittest2>=0.8.0',
-        ],
+      install_requires=deps,
+      setup_requires=deps,
       )