Generate PDF documentation

This commit adds a new tox target to build PDF documentation.
It's a part of community goal, see storyboard for more
information.

Story: 2006075
Task: 34809

Change-Id: I537aaea5c0e3341f8026589fc4b2c56505707ffb

doc/requirements.txt

@@ -5,4 +5,6 @@
 openstackdocstheme>=1.30.0 # Apache-2.0
 sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
+sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
 reno>=2.5.0 # Apache-2.0
+

doc/source/conf.py

@@ -33,6 +33,7 @@ extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.intersphinx',
     'openstackdocstheme',
+    'sphinxcontrib.rsvgconverter',
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -188,27 +189,28 @@ htmlhelp_basename = '%sdoc' % project
 
 # -- Options for LaTeX output ---------------------------------------------
 
+# Disable usage of xindy https://bugzilla.redhat.com/show_bug.cgi?id=1643664
+latex_use_xindy = False
+
+latex_domain_indices = False
+
 latex_elements = {
-# The paper size ('letterpaper' or 'a4paper').
-#'papersize': 'letterpaper',
-
-# The font size ('10pt', '11pt' or '12pt').
-#'pointsize': '10pt',
-
-# Additional stuff for the LaTeX preamble.
-#'preamble': '',
+    'makeindex': '',
+    'printindex': '',
+    'preamble': r'\setcounter{tocdepth}{3}',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
+# NOTE: Specify toctree_only=True for a better document structure of
+# the generated PDF file.
 latex_documents = [
     (
         'index',
-        '%s.tex' % project,
-        u'%s Documentation' % project,
-        u'Objectif Libre',
-        'manual'
+        'doc-%s.tex' % project,
+        u'Cloudkitty-Dashboard Documentation',
+        u'OpenStack Foundation', 'howto', True
     ),
 ]
 

tox.ini

@@ -36,6 +36,16 @@ basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
+[testenv:pdf-docs]
+basepython = python3
+envdir = {toxworkdir}/docs
+deps = {[testenv:docs]deps}
+whitelist_externals =
+  make
+commands =
+  sphinx-build -W -b latex doc/source doc/build/pdf
+  make -C doc/build/pdf
+
 [testenv:debug]
 basepython = python3
 commands = oslo_debug_helper -t cloudkittydashboard/tests {posargs}