fix tox python3 overrides

We want to default to running all tox environments under python 3, so
set the basepython value in each environment.

We do not want to specify a minor version number, because we do not
want to have to update the file every time we upgrade python.

We do not want to set the override once in testenv, because that
breaks the more specific versions used in default environments like
py35 and py36.

Decode the output of subprocess in doc/source/conf.py so that we always
have a string.

Change-Id: I17601d56b6e6d9d300bb07d8982a7bbde637822e
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

2 files changed, 6 insertions, 2 deletions

diff --git a/doc/source/conf.py b/doc/source/conf.py
index 2d26f1f..f718ee4 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -63,7 +63,7 @@ copyright = u'%s, OpenStack Foundation' % datetime.date.today().year
 #
 # The short X.Y version.
 version = subprocess.Popen(['sh', '-c', 'cd ../..; python setup.py --version'],
-                           stdout=subprocess.PIPE).stdout.read()
+                           stdout=subprocess.PIPE).stdout.read().decode('utf-8')
 version = version.strip()
 # The full version, including alpha/beta/rc tags.
 release = version
diff --git a/tox.ini b/tox.ini
index 0d38b96..06ffeb0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,6 @@ minversion = 1.8
 envlist = py27,py35,py{27,35}-{zookeeper,redis,sentinel,memcached,postgresql,mysql,consul,etcd,etcd3,etcd3gw},pep8
 
 [testenv]
-basepython = python3
 # We need to install a bit more than just `test' because those drivers have
 # custom tests that we always run
 deps = .[test,zake,ipc,memcached,mysql,etcd,etcd3,etcd3gw]
@@ -40,18 +39,22 @@ commands =
 basepython = python2.7
 
 [testenv:venv]
+basepython = python3
 # This target is used by the gate go run Sphinx to build the doc
 deps = {[testenv:docs]deps}
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands = python setup.py testr --slowest --coverage --testr-args="{posargs}"
 
 [testenv:docs]
+basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pep8]
+basepython = python3
 deps = hacking<0.13,>=0.12
       doc8
 commands =
@@ -63,5 +66,6 @@ exclude=.venv,.git,.tox,dist,*egg,*.egg-info,build,examples,doc
 show-source = True
 
 [testenv:releasenotes]
+basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html