update tox.ini to remove hand written per-env-statements

.travis.yml

@@ -11,7 +11,7 @@ python:
 - '3.4'
 - '3.5'
 install:
-- travis_retry pip install -r requirements-${TRAVIS_PYTHON_VERSION}.txt --allow-external
+- travis_retry pip install -e .
   argparse
 - travis_retry pip install coveralls
 - travis_retry pip install coverage

setup.py

@@ -92,5 +92,8 @@ def _get_specific_requirements():
     }
     params['install_requires'] = list(REQS)
     params['test_suite'] = 'unittest.collector'
+    params['extras_require'] = {
+        'doc': ['Sphinx>=1.0.5']
+    }
 
 setup(**params)

tox.ini

@@ -3,7 +3,7 @@ envlist=py27,py33,py34,pypy,docs,self27,cov27
 
 # Default settings for py27, py33, py34 and pypy
 [testenv]
-deps=-r{toxinidir}/requirements.txt
+deps=-e {toxinidir}
 commands=python -m unittest discover []
 
 [testenv:jython]
@@ -14,23 +14,21 @@ commands=unit2 discover []
 [testenv:docs]
 basepython=python2.7
 changedir=docs
-deps=-r{toxinidir}/requirements-2.7.txt
-     -r{toxinidir}/requirements-docs.txt
+deps=-e {toxinidir}[doc]
 commands=sphinx-build -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
 
 [testenv:py27]
 deps=-r{toxinidir}/requirements-2.7.txt
 
 [testenv:self27]
 basepython=python2.7
-deps=-r{toxinidir}/requirements-2.7.txt
+deps=-e {toxinidir}
 setenv=PYTHONPATH={toxinidir}
 commands=python -m nose2.__main__ []
 
 [testenv:cov27]
 basepython=python2.7
-deps=coverage>=3.3
-     -r{toxinidir}/requirements-2.7.txt
+deps=-e {toxinidir}
 commands=coverage erase
          coverage run -m unittest discover []
          coverage report --include=*nose2* --omit=*nose2/tests*