[PATCH olang] docs: add sphinx documentation support

[Johnny Richard <johnny@johnnyrichard.com>]

This patch introduces an initial setup for our documentation build.  As
soon as we start writing docs, we can agree on which target should be
added to the root Makefile.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---

Next step should be documenting the HACKING document and from there we
can have engouh information about dependencies and how to build the
docs.

 .gitignore     |  1 +
 docs/Makefile  | 20 ++++++++++++++++++++
 docs/conf.py   | 28 ++++++++++++++++++++++++++++
 docs/index.rst | 20 ++++++++++++++++++++
 docs/make.bat  | 35 +++++++++++++++++++++++++++++++++++
 5 files changed, 104 insertions(+)
 create mode 100644 docs/Makefile
 create mode 100644 docs/conf.py
 create mode 100644 docs/index.rst
 create mode 100644 docs/make.bat

diff --git a/.gitignore b/.gitignore
index b140d08..77f3000 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 0c
 build
 *.o
+docs/_build
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..d4bb2cb
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..ee7421a
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,28 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = 'olang'
+copyright = '2024, olang maintainers'
+author = 'olang maintainers'
+release = '0.0.1'
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = []
+
+templates_path = ['_templates']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'alabaster'
+html_static_path = ['_static']
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..447f3af
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,20 @@
+.. olang documentation master file, created by
+   sphinx-quickstart on Fri Feb 16 09:48:43 2024.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to olang's documentation!
+=================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/docs/make.bat b/docs/make.bat
new file mode 100644
index 0000000..32bb245
--- /dev/null
+++ b/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
-- 
2.42.0