tox: Install extras

Install these via tox.ini when required. Note that we don't add them to
'test-requirements.txt' since packagers consume those and would be
forced to package these dependencies or modify this file.

A small bug in the tox file is corrected: you can't share an environment
directory if the dependencies in that directory are different. As such,
pep8 must go in its own directory again, not the 'shared' directory.

Change-Id: Iffb9ff2e300213ec01cccaf3b967e73331c9c9ff
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

tox.ini

@@ -29,6 +29,11 @@ deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
+extras =
+  powervm
+  zvm
+  hyperv
+  vmware
 passenv =
   OS_DEBUG GENERATE_HASHES
 # there is also secret magic in subunit-trace which lets you run in a fail only
@@ -42,16 +47,17 @@ commands =
 description =
   Run type checks.
 envdir = {toxworkdir}/shared
+extras =
 commands =
   bash tools/mypywrap.sh {posargs}
 
 [testenv:pep8]
 description =
   Run style checks.
-envdir = {toxworkdir}/shared
 deps =
   {[testenv]deps}
   autopep8
+extras =
 commands =
   {[testenv:mypy]commands}
   # check if autopep8 would alter the formatting but don't actually change it
@@ -68,6 +74,7 @@ commands =
   bash -c '! find doc/ -type f -name *.json | xargs -t -n1 python -m json.tool 2>&1 > /dev/null | grep -B1 -v ^python'
 
 [testenv:autopep8]
+extras =
 deps = autopep8
 commands =
   autopep8 --exit-code --max-line-length=79 --in-place -r nova doc setup.py
@@ -76,6 +83,7 @@ commands =
 description =
   Run style checks on the changes made since HEAD~. For a full run including docs, use 'pep8'
 envdir = {toxworkdir}/shared
+extras =
 commands =
   bash tools/flake8wrap.sh -HEAD
 
@@ -84,6 +92,7 @@ description =
   Determine whether a backport is ready to be merged by checking whether it has
   already been merged to master or more recent stable branches.
 deps =
+extras =
 skipsdist = true
 commands =
   bash tools/check-cherry-picks.sh
@@ -108,6 +117,7 @@ description =
 deps =
   {[testenv]deps}
   openstack-placement>=1.0.0
+extras =
 commands =
   stestr --test-path=./nova/tests/functional run {posargs}
   stestr slowest
@@ -116,6 +126,7 @@ commands =
 description =
   Run functional tests using python3.6.
 deps = {[testenv:functional]deps}
+extras =
 commands =
   {[testenv:functional]commands}
 
@@ -123,6 +134,7 @@ commands =
 description =
   Run functional tests using python3.7.
 deps = {[testenv:functional]deps}
+extras =
 commands =
   {[testenv:functional]commands}
 
@@ -130,6 +142,7 @@ commands =
 description =
   Run functional tests using python3.8.
 deps = {[testenv:functional]deps}
+extras =
 commands =
   {[testenv:functional]commands}
 
@@ -140,6 +153,7 @@ description =
   placement-nova-tox-functional-py38 job which is defined and
   run in placement.
 deps = {[testenv:functional]deps}
+extras =
 commands =
   stestr --test-path=./nova/tests/functional run --exclude-regex '((?:api|notification)_sample_tests|functional\.db\.)' {posargs}
 
@@ -147,6 +161,7 @@ commands =
 description =
   Run functional tests using python3.9.
 deps = {[testenv:functional]deps}
+extras =
 commands =
   {[testenv:functional]commands}
 
@@ -157,17 +172,20 @@ setenv =
   GENERATE_SAMPLES=True
   PYTHONHASHSEED=0
 deps = {[testenv:functional]deps}
+extras =
 commands =
   stestr --test-path=./nova/tests/functional/api_sample_tests run {posargs}
   stestr slowest
 
 [testenv:genconfig]
 envdir = {toxworkdir}/shared
+extras =
 commands =
   oslo-config-generator --config-file=etc/nova/nova-config-generator.conf
 
 [testenv:genpolicy]
 envdir = {toxworkdir}/shared
+extras =
 commands =
   oslopolicy-sample-generator --config-file=etc/nova/nova-policy-generator.conf
 
@@ -180,6 +198,7 @@ envdir = {toxworkdir}/shared
 setenv =
   {[testenv]setenv}
   PYTHON=coverage run --source nova --parallel-mode
+extras =
 commands =
   coverage erase
   stestr run {posargs}
@@ -190,6 +209,7 @@ commands =
 
 [testenv:debug]
 envdir = {toxworkdir}/shared
+extras =
 commands =
   oslo_debug_helper {posargs}
 
@@ -197,6 +217,7 @@ commands =
 deps =
   {[testenv]deps}
   -r{toxinidir}/doc/requirements.txt
+extras =
 commands =
   {posargs}
 
@@ -208,6 +229,7 @@ description =
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
+extras =
 commands =
   rm -rf doc/build/html doc/build/doctrees
   sphinx-build -W --keep-going -b html -j auto doc/source doc/build/html
@@ -219,6 +241,7 @@ description =
   Build PDF documentation.
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
+extras =
 commands =
   rm -rf doc/build/pdf
   sphinx-build -W --keep-going -b latex -j auto doc/source doc/build/pdf
@@ -229,6 +252,7 @@ description =
   Generate the API guide. Called from CI scripts to test and publish to docs.openstack.org.
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
+extras =
 commands =
   rm -rf api-guide/build
   sphinx-build -W --keep-going -b html -j auto api-guide/source api-guide/build/html
@@ -238,6 +262,7 @@ description =
   Generate the API ref. Called from CI scripts to test and publish to docs.openstack.org.
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
+extras =
 commands =
   rm -rf api-ref/build
   sphinx-build -W --keep-going -b html -j auto api-ref/source api-ref/build/html
@@ -247,6 +272,7 @@ description =
   Generate release notes.
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
+extras =
 commands =
   rm -rf releasenotes/build
   sphinx-build -W --keep-going -b html -j auto releasenotes/source releasenotes/build/html
@@ -256,6 +282,7 @@ description =
   Build all documentation including API guides and refs.
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
+extras =
 commands =
   {[testenv:docs]commands}
   {[testenv:api-guide]commands}
@@ -266,6 +293,7 @@ commands =
 # NOTE(browne): This is required for the integration test job of the bandit
 # project. Please do not remove.
 envdir = {toxworkdir}/shared
+extras =
 commands = bandit -r nova -x tests -n 5 -ll
 
 [flake8]
@@ -358,6 +386,7 @@ paths =
 # explicitly to avoid unnecessarily installing the checked-out repo too
 usedevelop = False
 deps = bindep
+extras =
 commands =
   bindep test