Submodule to RTD transition documentation

Adds documentation for current projects on how to migrate to using local
doc builds, along with steps for new projects to setup their builds.

Issue: DOCS-191
Change-Id: I1c850457dec1006199d095ad63469af1ca02a760
Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

8 files changed, 136 insertions, 1 deletions

diff --git a/docs/how-to-use-docs/documentation-guide.rst b/docs/how-to-use-docs/documentation-guide.rst
index 56bf273bc..0f2c3bf02 100644
--- a/docs/how-to-use-docs/documentation-guide.rst
+++ b/docs/how-to-use-docs/documentation-guide.rst
@@ -15,7 +15,7 @@ Getting Started with Documentation for Your Project
 OPNFV documentation is automated and integrated into our git & gerrit toolchains.
 
 We use RST document templates in our repositories and automatically render to HTML and PDF versions of the documents in our artifact
-store, our WiKi is also able to integrate these rendered documents directly allowing projects to use the revision controlled documentation
+store, our Wiki is also able to integrate these rendered documents directly allowing projects to use the revision controlled documentation
 process for project information, content and deliverables.
 Read :ref:`this page <include-documentation>` which elaborates on how documentation is to be included within opnfvdocs.
 
diff --git a/docs/how-to-use-docs/files/conf.py b/docs/how-to-use-docs/files/conf.py
new file mode 100644
index 000000000..3c4453e71
--- /dev/null
+++ b/docs/how-to-use-docs/files/conf.py
@@ -0,0 +1 @@
+from docs_conf.conf import *
diff --git a/docs/how-to-use-docs/files/conf.yaml b/docs/how-to-use-docs/files/conf.yaml
new file mode 100644
index 000000000..caad28ff4
--- /dev/null
+++ b/docs/how-to-use-docs/files/conf.yaml
@@ -0,0 +1,3 @@
+---
+project_cfg: opnfv
+project: Example
diff --git a/docs/how-to-use-docs/files/index b/docs/how-to-use-docs/files/index
new file mode 100644
index 000000000..21da2ac4e
--- /dev/null
+++ b/docs/how-to-use-docs/files/index
@@ -0,0 +1,17 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. SPDX-License-Identifier: CC-BY-4.0
+.. (c) Open Platform for NFV Project, Inc. and its contributors
+
+.. _opnfv-project-foo:
+
+===
+FOO
+===
+
+.. toctree::
+   :numbered:
+   :maxdepth: 2
+
+   development
+   release
+   testing
diff --git a/docs/how-to-use-docs/files/requirements.txt b/docs/how-to-use-docs/files/requirements.txt
new file mode 100644
index 000000000..440843584
--- /dev/null
+++ b/docs/how-to-use-docs/files/requirements.txt
@@ -0,0 +1,5 @@
+lfdocs-conf
+sphinx_opnfv_theme
+# Uncomment the following line if your project uses Sphinx to document
+# HTTP APIs
+# sphinxcontrib-httpdomain
diff --git a/docs/how-to-use-docs/files/tox.ini b/docs/how-to-use-docs/files/tox.ini
new file mode 100644
index 000000000..69aa18937
--- /dev/null
+++ b/docs/how-to-use-docs/files/tox.ini
@@ -0,0 +1,17 @@
+[tox]
+minversion = 1.6
+envlist =
+    docs,
+    docs-linkcheck
+skipsdist = true
+
+[testenv:docs]
+deps = -rdocs/requirements.txt
+commands =
+    sphinx-build -b html -n -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/html
+    echo "Generated docs available in {toxinidir}/docs/_build/html"
+whitelist_externals = echo
+
+[testenv:docs-linkcheck]
+deps = -rdocs/requirements.txt
+commands = sphinx-build -b linkcheck -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/linkcheck
diff --git a/docs/how-to-use-docs/index.rst b/docs/how-to-use-docs/index.rst
index 424f47189..c56ff40ce 100644
--- a/docs/how-to-use-docs/index.rst
+++ b/docs/how-to-use-docs/index.rst
@@ -9,4 +9,5 @@ Documentation Guide
 
    documentation-guide
    include-documentation
+   local-build-transition
    addendum
diff --git a/docs/how-to-use-docs/local-build-transition.rst b/docs/how-to-use-docs/local-build-transition.rst
new file mode 100644
index 000000000..415afe816
--- /dev/null
+++ b/docs/how-to-use-docs/local-build-transition.rst
@@ -0,0 +1,91 @@
+Submodule Transition
+====================
+
+Moving away from submodules.
+
+At the cost of some release-time overhead, there are several benefits
+the transition provides projects:
+
+* Local builds - Projects will be able to build and view there docs
+  locally, as they would appear on the OPNFV Docs website.
+* Reduced build time - Patchset verification will only run against
+  individual projects docs, not all projects.
+* Decoupled build failures - Any error introduced to project's docs
+  would not break builds for all the other projects
+
+Steps
+-----
+
+To make the transition the following steps need to be taken across the
+project repository, releng repository and opnfvdocs repository.
+
+In your project repo:
+
+#. Add the following files:
+
+   *docs/conf.py*
+
+   .. literalinclude:: files/conf.py
+
+   *docs/conf.yaml*
+
+   .. literalinclude:: files/conf.yaml
+
+   *docs/requirements.txt*
+
+   .. literalinclude:: files/requirements.txt
+
+   *tox.ini*
+
+   .. literalinclude:: files/tox.ini
+
+   *.gitignore*
+
+   .tox/
+   docs/_build/*
+
+   *docs/index.rst*
+
+   if it doesn't exist along with other index file for directories
+   (release, development)
+
+In the releng repository:
+
+#. Follow the steps in `this guide`_ from the Linux Foundation Releng team on
+   bootstrapping a new ReadTheDocs (RTD) project.
+
+   This will ensure RTD will update each time docs patches are merged to
+   the repository.
+
+.. note: In step 4 of the guide, the file this job should be added to is:
+         **jjb/project/project-jobs.yaml**, where project is the OPNFV project.
+
+.. _`this guide`: https://docs.releng.linuxfoundation.org/en/latest/project-documentation.html#bootstrap-a-new-project
+
+
+In the opnfvdocs repository:
+
+#. Add a intersphinx link to the opnfvdocs repo:
+
+   Here 'example' should be replaced with the name of your project.
+
+   .. code-block:: python
+       :name: docs/conf.py
+
+       intersphinx_mapping['example'] = ('http://opnfv-example.readthedocs.io', None)
+
+#. Ensure all references in opnfvdocs are using `:ref:` and not
+   directly specifying submodule files (No `:doc:` or 'submodules/...'
+   in `.. toctree:`)
+
+#. Remove the submodule from opnfvdocs::
+
+    diff --git a/.gitmodules b/.gitmodules
+    index 846ab245..aab01642 100644
+    --- a/.gitmodules
+    +++ b/.gitmodules
+    @@ -151,4 +150,0 @@
+    -[submodule "docs/submodules/releng"]
+    -       path = docs/submodules/releng
+    -       url = ../releng
+    -       branch = master