style: Enable flake8 with proper exclusions

This patch ensures we are running flake8 in a DRY fashion, using the same
exclusions as used for pep8. Also fixed is the pep8 module version mismatch
between the version required for hacking.py and the newer version used by
flake8. Finally, the doctest run for pep8 was removed, and enabled for
nose instead.

Implements: blueprint grizzly-debt
Change-Id: I8e19512df4cd37f7ad637b66dff0a5982d14482c

setup.cfg

@@ -1,10 +1,14 @@
 [nosetests]
-cover-package=marconi
+where=marconi/tests
-cover-html=true
-cover-erase=true
-cover-inclusive=true
 verbosity=2
 
+with-doctest = true
+
+cover-package = marconi
+cover-html = true
+cover-erase = true
+cover-inclusive = true
+
 ; Disabled: Causes a bug in testtools to manifest.
 ; Trigger: self.assertX(condition), where condition == False.
 ;
@@ -12,6 +16,5 @@ verbosity=2
 ; None in _details_to_exc_info(), but the inspect_traceback()
 ; method in nose/inspector.py requires a traceback-like object.
 ;
-; detailed-errors=1
+; detailed-errors = 1
 
-where=marconi/tests

tools/run_pep8.sh

@@ -1,15 +1,17 @@
 #!/usr/bin/env bash
 
 set -e
-# This is used by run_tests.sh and tox.ini
-python tools/hacking.py --doctest
 
-# Until all these issues get fixed, ignore.
 PEP8='python tools/hacking.py --ignore=N404'
+FLAKE8='flake8 --builtins=_,__MARCONI_SETUP__'
 
 EXCLUDE='--exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*'
 EXCLUDE+=',./tools'
 EXCLUDE+=',*egg,build'
-${PEP8} ${EXCLUDE} .
 
-! flake8 marconi --builtins=_,__MARCONI_SETUP__
+if [ $1 = pep8 ]
+then
+    ${PEP8} ${EXCLUDE} .
+else
+    ${FLAKE8} ${EXCLUDE}
+fi

tools/test-requires

@@ -3,8 +3,6 @@ coverage
 discover
 fixtures
 mox
-pep8==1.3.3
-flake8
 python-subunit
 testrepository
 testtools

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py26,py27,pep8
+envlist = py26,py27,pep8,flake8
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
@@ -18,8 +18,12 @@ sitepackages = True
 downloadcache = ~/cache/pip
 
 [testenv:pep8]
-# deps = pep8==1.3.3
+deps = pep8==1.3.3
-commands = {toxinidir}/tools/run_pep8.sh
+commands = {toxinidir}/tools/run_pep8.sh pep8
+
+[testenv:flake8]
+deps = flake8
+commands = {toxinidir}/tools/run_pep8.sh flake8
 
 [testenv:cover]
 setenv = NOSE_WITH_COVERAGE=1