Create doc/requirements.txt

For compliance with the Project Testing Interface as described in:
https://governance.openstack.org/tc/reference/project-testing-interface.html

Refer to:
http://lists.openstack.org/pipermail/openstack-dev/2017-November/124815.html

Change-Id: Ifdfdaacad8574fcfcac9c1b52b0bed6fed4f8411

doc/requirements.txt

@@ -0,0 +1,9 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
+openstackdocstheme>=1.18.1 # Apache-2.0
+os-api-ref>=1.4.0 # Apache-2.0
+sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+reno>=2.5.0 # Apache-2.0
+sphinxcontrib-httpdomain>=1.3.0  # BSD

test-requirements.txt

@@ -11,17 +11,13 @@ kombu!=4.0.2,>=4.0.0 # BSD
 mock>=2.0.0 # BSD
 mox3>=0.20.0 # Apache-2.0
 PyMySQL>=0.7.6 # MIT License
-openstackdocstheme>=1.18.1 # Apache-2.0
-os-api-ref>=1.4.0 # Apache-2.0
 os-testr>=1.0.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 qpid-python>=0.26;python_version=='2.7' # Apache-2.0
 psycopg2>=2.6.2 # LGPL/ZPL
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 testresources>=2.0.0 # Apache-2.0/BSD
-reno>=2.5.0 # Apache-2.0
 # Next are used in integration tests only
 tempest>=17.1.0 # Apache-2.0

tox.ini

@@ -61,14 +61,15 @@ commands =
   coverage report
 
 [testenv:docs]
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-       sphinxcontrib-httpdomain
-commands = python setup.py build_sphinx
+deps = -r{toxinidir}/doc/requirements.txt
+commands =
+  rm -rf doc/build
+  sphinx-build -b html doc/source doc/build/html
 
 [testenv:api-ref]
 # This environment is called from CI scripts to test and publish
 # the API Ref to developer.openstack.org.
+deps = -r{toxinidir}/doc/requirements.txt
 whitelist_externals = bash
                       rm
 commands =
@@ -114,4 +115,5 @@ local-check-factory = heat.hacking.checks.factory
 commands = oslo_debug_helper {posargs}
 
 [testenv:releasenotes]
+deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html