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.

To install horizon, check python3 version and set target directory
in postinstall script on package.json.

Change-Id: Iadf07f630bfc5d8f8d0c2a57e108c0f05aca899d
Co-Authored-By: Shu Muto <shu.mutow@gmail.com>

package.json

@@ -21,7 +21,7 @@
     "phantomjs-prebuilt": "2.1.x"
   },
   "scripts": {
-    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; python3.5 -m pip install -U -t ./.tox/karma/lib/python3.5/site-packages/ ../horizon; fi",
+    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; python3 -m pip install -U -t ./.tox/karma/lib/`python3 -V|tr -d ' '|tr 'P' 'p'|cut -c -9`/site-packages/ ../horizon; fi",
     "test": "karma start zun_ui/karma.conf.js --single-run",
     "lint": "eslint --no-color zun_ui/static",
     "lintq": "eslint --quiet zun_ui/static"

tox.ini

@@ -26,10 +26,11 @@ commands =
   pip install -e ../horizon
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:pep8]
-basepython = python3.5
+basepython = python3
 commands = flake8 {posargs}
 
 [flake8]
@@ -37,6 +38,7 @@ exclude = .venv,.git,.tox,dist,*egg,build,node_modules
 max-complexity = 20
 
 [testenv:cover]
+basepython = python3
 commands = python setup.py test --coverage --testr-args='{posargs}'
 
 # NOTE(shu-mutow): On CI infra, horizon will be installed
@@ -71,7 +73,7 @@ commands =
   {[testenv]commands}
 
 [testenv:eslint]
-basepython = python3.5
+basepython = python3
 whitelist_externals =
   npm
 commands =
@@ -79,10 +81,10 @@ commands =
   npm run lint
 
 # NOTE(shu-mutow): The "postinstall" script on package.json will install horizon
-# from master branch into py35 environment for testing javascripts.
+# from master branch into python3.x environment for testing javascripts.
 # Horizon from master is needed to be cloned into ../horizon on both local and CI.
 [testenv:karma]
-basepython = python3.5
+basepython = python3
 whitelist_externals =
   {[testenv:eslint]whitelist_externals}
 commands =
@@ -90,14 +92,14 @@ commands =
   npm run test
 
 [testenv:karma-local]
-basepython = python3.5
+basepython = python3
 whitelist_externals =
   {[testenv:eslint]whitelist_externals}
 commands =
   {[testenv:karma]commands}
 
 [testenv:docs]
-basepython = python3.5
+basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/doc/requirements.txt
@@ -105,7 +107,7 @@ commands=
   sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:docs-local]
-basepython = python3.5
+basepython = python3
 deps =
   {[testenv:docs]deps}
 commands=
@@ -113,7 +115,7 @@ commands=
   {[testenv:docs]commands}
 
 [testenv:releasenotes]
-basepython = python3.5
+basepython = python3
 deps =
   {[testenv:docs]deps}
 commands =

zun_ui/karma.conf.js

@@ -16,14 +16,18 @@
 
 var fs = require('fs');
 var path = require('path');
+var child_process = require("child_process");
 
 module.exports = function (config) {
   // This tox venv is setup in the post-install npm step
-  var toxPath = '../.tox/karma/lib/python3.5/site-packages/';
+  var pythonVersion = "python3.";
+  var stdout = child_process.execFileSync("python3", ["--version"]);
+  pythonVersion += stdout.toString().split(".")[1];
+  var toxPath = '../.tox/karma/lib/' + pythonVersion + '/site-packages/';
+  console.log("Karma will check on directory: ", toxPath);
 
   process.env.PHANTOMJS_BIN = 'node_modules/phantomjs-prebuilt/bin/phantomjs';
 
-
   config.set({
     preprocessors: {
       // Used to collect templates for preprocessing.