Create tox environment to build pdf documentation

This patch enables building .pdf documentation using new 'pdf-docs'
tox environment. The newly created tox environment creates latex
source codes using sphinx-build and then builds the pdf
documentation using make.

Change-Id: Id93200ae85c25dfb713e96a09d2ee4aea611ed33
Task: 35470

doc/source/conf.py

@@ -31,6 +31,7 @@ import os
 extensions = [
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
+              'sphinxcontrib.rsvgconverter',
               'openstackdocstheme',
               'yasfb',
              ]
@@ -188,7 +189,7 @@ htmlhelp_basename = 'QA-Specsdoc'
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'QA-specs.tex', u'QA Specs',
+  ('index', 'QA-specs.tex', u'QA Specs Documentation',
    u'OpenStack QA Team', 'manual'),
 ]
 
@@ -291,3 +292,8 @@ epub_copyright = u'2014, OpenStack QA Team'
 
 # Do not warn about non-local image URI
 suppress_warnings = ['image.nonlocal_uri']
+
+latex_use_xindy = False
+latex_elements = {
+    'extraclassoptions': 'openany,oneside',
+}

requirements.txt

@@ -3,3 +3,4 @@ docutils>=0.11,!=0.13.1  # OSI-Approved Open Source, Public Domain
 sphinx>=2.0.0,!=2.1.0 # BSD
 yasfb>=0.5.1
 openstackdocstheme>=2.2.1 # Apache-2.0
+sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD

tox.ini

@@ -16,6 +16,13 @@ commands = {posargs}
 [testenv:docs]
 commands = sphinx-build -W -b html doc/source doc/build/html
 
+[testenv:pdf-docs]
+whitelist_externals =
+   make
+commands =
+   sphinx-build -W -b latex doc/source doc/build/pdf
+   make -C doc/build/pdf
+
 [testenv:spelling]
 deps =
     -r{toxinidir}/requirements.txt