Make examples buildable

It now excludes .tox from conf.py.
It locally clones docutils cheatsheet as examples (it should be noted
that cheatsheet.txt is renamed index.rst in it).

[1] https://docutils.sourceforge.io/docs/user/rst/cheatsheet.txt

Issue-ID: DOC-772

Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
Change-Id: Ifd616b797d5a48da5df77b0dfaa0613497b742d8

9 files changed, 247 insertions, 0 deletions

diff --git a/examples/sphinx/istanbul/_static/css/ribbon.css b/examples/sphinx/istanbul/_static/css/ribbon.css
new file mode 100644
index 000000000..6008cb1a0
--- /dev/null
+++ b/examples/sphinx/istanbul/_static/css/ribbon.css
@@ -0,0 +1,63 @@
+.ribbon {
+  z-index: 1000;
+  background-color: #a00;
+  overflow: hidden;
+  white-space: nowrap;
+  position: fixed;
+  top: 25px;
+  right: -50px;
+  -webkit-transform: rotate(45deg);
+     -moz-transform: rotate(45deg);
+      -ms-transform: rotate(45deg);
+       -o-transform: rotate(45deg);
+          transform: rotate(45deg);
+  -webkit-box-shadow: 0 0 10px #888;
+     -moz-box-shadow: 0 0 10px #888;
+          box-shadow: 0 0 10px #888;
+
+}
+
+.ribbon a {
+  border: 1px solid #faa;
+  color: #fff;
+  display: block;
+  font: bold 81.25% 'Helvetica Neue', Helvetica, Arial, sans-serif;
+  margin: 1px 0;
+  padding: 10px 50px;
+  text-align: center;
+  text-decoration: none;
+  text-shadow: 0 0 5px #444;
+  transition: 0.5s;
+}
+
+.ribbon a:hover {
+  background: #c11;
+  color: #fff;
+}
+
+
+/* override table width restrictions */
+@media screen and (min-width: 767px) {
+
+   .wy-table-responsive table td, .wy-table-responsive table th {
+      /* !important prevents the common CSS stylesheets from overriding
+         this as on RTD they are loaded after this stylesheet */
+      white-space: normal !important;
+   }
+
+   .wy-table-responsive {
+      overflow: visible !important;
+   }
+}
+
+@media screen and (max-width: 767px) {
+    .wy-table-responsive table td {
+        white-space: nowrap;
+    }
+}
+
+/* fix width of the screen */
+
+.wy-nav-content {
+    max-width: none;
+}
diff --git a/examples/sphinx/istanbul/_static/favicon.ico b/examples/sphinx/istanbul/_static/favicon.ico
new file mode 100755
index 000000000..cb712ebd2
--- /dev/null
+++ b/examples/sphinx/istanbul/_static/favicon.ico
diff --git a/examples/sphinx/istanbul/_static/logo_onap_2017.png b/examples/sphinx/istanbul/_static/logo_onap_2017.png
new file mode 100644
index 000000000..5d064f431
--- /dev/null
+++ b/examples/sphinx/istanbul/_static/logo_onap_2017.png
diff --git a/examples/sphinx/istanbul/conf.py b/examples/sphinx/istanbul/conf.py
new file mode 100644
index 000000000..1d6c7d357
--- /dev/null
+++ b/examples/sphinx/istanbul/conf.py
@@ -0,0 +1,19 @@
+from docs_conf.conf import *
+
+branch = 'istanbul'
+master_doc = 'index'
+
+linkcheck_ignore = [
+    'http://localhost',
+]
+
+exclude_patterns = [
+    '.tox'
+]
+
+intersphinx_mapping = {}
+
+html_last_updated_fmt = '%d-%b-%y %H:%M'
+
+def setup(app):
+    app.add_css_file("css/ribbon.css")
diff --git a/examples/sphinx/istanbul/conf.yaml b/examples/sphinx/istanbul/conf.yaml
new file mode 100644
index 000000000..44de212d1
--- /dev/null
+++ b/examples/sphinx/istanbul/conf.yaml
@@ -0,0 +1,7 @@
+---
+project_cfg: onap
+project: onap
+
+# Change this to ReleaseBranchName to modify the header
+default-version: istanbul
+#
diff --git a/examples/sphinx/istanbul/images/biohazard.png b/examples/sphinx/istanbul/images/biohazard.png
new file mode 100644
index 000000000..ae4629d8b
--- /dev/null
+++ b/examples/sphinx/istanbul/images/biohazard.png
diff --git a/examples/sphinx/istanbul/index.rst b/examples/sphinx/istanbul/index.rst
new file mode 100644
index 000000000..c7685a558
--- /dev/null
+++ b/examples/sphinx/istanbul/index.rst
@@ -0,0 +1,132 @@
+=====================================================
+ The reStructuredText_ Cheat Sheet: Syntax Reminders
+=====================================================
+:Info: See <http://docutils.sf.net/rst.html> for introductory docs.
+:Author: David Goodger <goodger@python.org>
+:Date: $Date: 2021-03-05 22:14:40 +0100 (Fr, 05. Mär 2021) $
+:Revision: $Revision: 8631 $
+:Description: This is a "docinfo block", or bibliographic field list
+
+.. NOTE:: If you are reading this as HTML, please read
+   `<index.rst>`_ instead to see the input syntax examples!
+
+Section Structure
+=================
+Section titles are underlined or overlined & underlined.
+
+Body Elements
+=============
+Grid table:
+
++--------------------------------+-----------------------------------+
+| Paragraphs are flush-left,     | Literal block, preceded by "::":: |
+| separated by blank lines.      |                                   |
+|                                |     Indented                      |
+|     Block quotes are indented. |                                   |
++--------------------------------+ or::                              |
+| >>> print 'Doctest block'      |                                   |
+| Doctest block                  | > Quoted                          |
++--------------------------------+-----------------------------------+
+| | Line blocks preserve line breaks & indents. [new in 0.3.6]       |
+| |     Useful for addresses, verse, and adornment-free lists; long  |
+|       lines can be wrapped with continuation lines.                |
++--------------------------------------------------------------------+
+
+Simple tables:
+
+================  ============================================================
+List Type         Examples (syntax in the `text source <index.rst>`_)
+================  ============================================================
+Bullet list       * items begin with "-", "+", or "*"
+Enumerated list   1. items use any variation of "1.", "A)", and "(i)"
+                  #. also auto-enumerated
+Definition list   Term is flush-left : optional classifier
+                      Definition is indented, no blank line between
+Field list        :field name: field body
+Option list       -o  at least 2 spaces between option & description
+================  ============================================================
+
+================  ============================================================
+Explicit Markup   Examples (visible in the `text source`_)
+================  ============================================================
+Footnote          .. [1] Manually numbered or [#] auto-numbered
+                     (even [#labelled]) or [*] auto-symbol
+Citation          .. [CIT2002] A citation.
+Hyperlink Target  .. _reStructuredText: http://docutils.sf.net/rst.html
+                  .. _indirect target: reStructuredText_
+                  .. _internal target:
+Anonymous Target  __ http://docutils.sf.net/docs/ref/rst/restructuredtext.html
+Directive ("::")  .. image:: images/biohazard.png
+Substitution Def  .. |substitution| replace:: like an inline directive
+Comment           .. is anything else
+Empty Comment     (".." on a line by itself, with blank lines before & after,
+                  used to separate indentation contexts)
+================  ============================================================
+
+Inline Markup
+=============
+*emphasis*; **strong emphasis**; `interpreted text`; `interpreted text
+with role`:emphasis:; ``inline literal text``; standalone hyperlink,
+http://docutils.sourceforge.net; named reference, reStructuredText_;
+`anonymous reference`__; footnote reference, [1]_; citation reference,
+[CIT2002]_; |substitution|; _`inline internal target`.
+
+Directive Quick Reference
+=========================
+See <http://docutils.sf.net/docs/ref/rst/directives.html> for full info.
+
+================  ============================================================
+Directive Name    Description (Docutils version added to, in [brackets])
+================  ============================================================
+attention         Specific admonition; also "caution", "danger",
+                  "error", "hint", "important", "note", "tip", "warning"
+admonition        Generic titled admonition: ``.. admonition:: By The Way``
+image             ``.. image:: picture.png``; many options possible
+figure            Like "image", but with optional caption and legend
+topic             ``.. topic:: Title``; like a mini section
+sidebar           ``.. sidebar:: Title``; like a mini parallel document
+parsed-literal    A literal block with parsed inline markup
+rubric            ``.. rubric:: Informal Heading``
+epigraph          Block quote with class="epigraph"
+highlights        Block quote with class="highlights"
+pull-quote        Block quote with class="pull-quote"
+compound          Compound paragraphs [0.3.6]
+container         Generic block-level container element [0.3.10]
+table             Create a titled table [0.3.1]
+list-table        Create a table from a uniform two-level bullet list [0.3.8]
+csv-table         Create a table from CSV data [0.3.4]
+contents          Generate a table of contents
+sectnum           Automatically number sections, subsections, etc.
+header, footer    Create document decorations [0.3.8]
+target-notes      Create an explicit footnote for each external target
+math              Mathematical notation (input in LaTeX format)
+meta              Document metadata
+include           Read an external reST file as if it were inline
+raw               Non-reST data passed untouched to the Writer
+replace           Replacement text for substitution definitions
+unicode           Unicode character code conversion for substitution defs
+date              Generates today's date; for substitution defs
+class             Set a "class" attribute on the next element
+role              Create a custom interpreted text role [0.3.2]
+default-role      Set the default interpreted text role [0.3.10]
+title             Set the metadata document title [0.3.10]
+================  ============================================================
+
+Interpreted Text Role Quick Reference
+=====================================
+See <http://docutils.sf.net/docs/ref/rst/roles.html> for full info.
+
+================  ============================================================
+Role Name         Description
+================  ============================================================
+emphasis          Equivalent to *emphasis*
+literal           Equivalent to ``literal`` but processes backslash escapes
+math              Mathematical notation (input in LaTeX format)
+PEP               Reference to a numbered Python Enhancement Proposal
+RFC               Reference to a numbered Internet Request For Comments
+raw               For non-reST data; cannot be used directly (see docs) [0.3.6]
+strong            Equivalent to **strong**
+sub               Subscript
+sup               Superscript
+title             Title reference (book, etc.); standard default role
+================  ============================================================
diff --git a/examples/sphinx/istanbul/requirements-docs.txt b/examples/sphinx/istanbul/requirements-docs.txt
new file mode 100644
index 000000000..74a3b7a3f
--- /dev/null
+++ b/examples/sphinx/istanbul/requirements-docs.txt
@@ -0,0 +1 @@
+lfdocs-conf
diff --git a/examples/sphinx/istanbul/tox.ini b/examples/sphinx/istanbul/tox.ini
new file mode 100644
index 000000000..8b5bc99bf
--- /dev/null
+++ b/examples/sphinx/istanbul/tox.ini
@@ -0,0 +1,25 @@
+[tox]
+minversion = 1.6
+envlist = docs,docs-linkcheck
+skipsdist = true
+
+[testenv:docs]
+basepython = python3
+deps =
+    -r{toxinidir}/requirements-docs.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.os.txt?h=istanbul
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.onap.txt?h=istanbul
+commands =
+    sphinx-build -W -b html -n -d {envtmpdir}/doctrees ./ {toxinidir}/_build/html
+    echo "Generated docs available in {toxinidir}/_build/html"
+whitelist_externals =
+    echo
+
+[testenv:docs-linkcheck]
+basepython = python3
+deps =
+    -r{toxinidir}/requirements-docs.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.os.txt?h=istanbul
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.onap.txt?h=istanbul
+commands =
+    sphinx-build -W -b linkcheck -d {envtmpdir}/doctrees ./ {toxinidir}/_build/linkcheck