[Doc] Building docs following Docs Contrib Guide

Baseline changes to comply with OpenStack Documentation
Contributor Guide [0] starting with the following sections:

- Project guide setup
  - [1] sphinx-quickstart
  - [2] doc/source/ layout
- Building documentation
  - [3] tox -e docs
- Using documentation tools
  - [4] openstackdocstheme
- Use build-openstack-docs-pti job template for docs

[0] https://docs.openstack.org/doc-contrib-guide
[1] http://www.sphinx-doc.org/en/master/usage/quickstart.html
[2] https://docs.openstack.org/doc-contrib-guide/project-guides.html
[3] https://docs.openstack.org/doc-contrib-guide/docs-builds.html
[4] https://docs.openstack.org/openstackdocstheme/

Story: 2002708
Task: 26510

Story: 2002813
Task: 26509

Change-Id: I30a92b228540eebd0f991e0c90675bc12d925894
Signed-off-by: Abraham Arce <abraham.arce.moreno@intel.com>

.gitignore

@@ -21,3 +21,6 @@ develop-eggs
 dist
 eggs
 sdist
+
+# Sphinx documentation
+doc/build/

.zuul.yaml

@@ -1,5 +1,7 @@
 ---
 - project:
+    templates:
+      - build-openstack-docs-pti
     check:
       jobs:
         - openstack-tox-linters

doc/requirements.txt

@@ -0,0 +1,2 @@
+sphinx>=1.6.2
+openstackdocstheme>=1.19.0 # Apache-2.0

doc/source/conf.py

@@ -0,0 +1,148 @@
+# -*- coding: utf-8 -*-
+#
+# Configuration file for the Sphinx documentation builder.
+#
+# This file does only contain a selection of the most common options. For a
+# full list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another
+# directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown
+# here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = u'stx-config'
+copyright = u'2018, StarlingX'
+author = u'StarlingX'
+
+# The short X.Y version
+version = u''
+# The full version, including alpha/beta/rc tags
+release = u'0.1'
+
+
+# -- General configuration ---------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = ['openstackdocstheme'
+              ]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = '.rst'
+
+# The master toctree document.
+master_doc = 'index'
+
+bug_project = '1027'
+bug_tag = 'stx.bug'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path .
+exclude_patterns = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'openstackdocs'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+# html_theme_options = {}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+# html_static_path = ['_static']
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# The default sidebars (for documents that don't match any pattern) are
+# defined by theme itself.  Builtin themes are using these templates by
+# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
+# 'searchbox.html']``.
+#
+# html_sidebars = {}
+
+
+# -- Options for HTMLHelp output ---------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'stx-configdoc'
+
+
+# -- Options for LaTeX output ------------------------------------------------
+
+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': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (master_doc, 'stx-config.tex', u'stx-config Documentation',
+     u'StarlingX', 'manual'),
+]
+
+
+# -- Options for manual page output ------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (master_doc, 'stx-config', u'stx-config Documentation',
+     [author], 1)
+]

doc/source/index.rst

@@ -0,0 +1,15 @@
+stx-config Documentation
+========================
+
+StarlingX System Configuration Management
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+
+
+Indices and tables
+==================
+
+* :ref:`search`

tox.ini

@@ -5,7 +5,7 @@ skipsdist = True
 
 [testenv]
 basepython = python3
-install_command = pip install -U {opts} {packages}
+install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/pike} {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_CAPTURE=1
          OS_STDERR_CAPTURE=1
@@ -46,3 +46,11 @@ description = Dummy environment to allow flake8 to be run in subdir tox
 
 [testenv:pylint]
 description = Dummy environment to allow pylint to be run in subdir tox
+
+[testenv:docs]
+basepython = python3
+deps = -r{toxinidir}/doc/requirements.txt
+commands =
+    rm -rf doc/build
+    sphinx-build -a -E -W -d doc/build/doctrees -b html doc/source doc/build/html
+whitelist_externals = rm