Add bashate tox configuration

Change-Id: Ie0852b16f4fc0586a9e0e49dfc6202bb8bbb0290

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = docs,pep8
+envlist = docs,pep8,bashate
 
 [testenv]
 usedevelop = True
@@ -39,3 +39,20 @@ commands =
 #     F403 'from ansible.module_utils.basic import *' used; unable to detect undefined names
 #     H303  No wildcard (*) import.
 ignore=F403,H303
+
+# Run bashate check for all bash scripts
+# Ignores the following rules:
+#     E003: Indent not multiple of 4 (we prefer to use multiples of 2)
+[testenv:bashate]
+deps = bashate
+whitelist_externals = bash
+commands =
+    bash -c "grep -Irl \
+        -e '!/usr/bin/env bash' \
+        -e '!/bin/bash' \
+        -e '!/bin/sh' \
+        --exclude-dir '.*' \
+        --exclude-dir '*.egg' \
+        --exclude-dir '*.egg-info' \
+        --exclude 'tox.ini' \
+        {toxinidir} | xargs bashate --verbose --ignore=E003"