adding_docs_to_existing_code.rst

Adding Sphinx docs to Existing Repositories

So, you need to add some docs for code that we've already written. You've come to the right place!

There are two common "setup" scenarios:

• :ref:`Project with no Sphinx docs<docs_from_scratch>`
• :ref:`Project with existing Sphinx docs, but no docs from code<adding_apidocs>`

No mater where you start, there are some :ref:`common enhancements<tweaking_conf_file>` to improve the generated output.

In a nutshell, we use Sphinx with documentation placed in the docs directory off the root of the project.

Adding Sphinx to a project with no docs yet

Make sure Sphinx is installed on your machine (it shouldn't be in your project's virtual environment). From the top level project directory, run:

sphinx-apidoc -F -A "RelEng Team" -V "0.1" -o docs $python_module_name

If you happen to have an early stage project, without a python module directory yet, GOOD FOR YOU!!! You'll just do the normal sphinx-quickstart. Please keep the defaults, except for 'autodoc' and 'viewcode' (say 'Y'/Yes to both):

sphinx-quickstart docs

No matter which way you add Sphinx, don't forget to add docs/_build to the project's .hgignore or .gitignore file.

Adding autodoc to a project already using Sphinx

The following command should maintain you existing docs, while adding the generated code documentation. From the top directory:

sphinx-apidoc -o docs $python_module_name

This will produce a file modules.rst which you'll need to manually add into your existing index.rst file.

Tweaking the conf.py file

After you've added generated documentation to your Sphinx project, you'll also need to tweak the generated docs/conf.py file needs a couple of edits to work properly. Around line 21, add the following lines:

sys.path.insert(0, os.path.abspath('..'))
import mock
MOCK_MODULES = []
for mod_name in MOCK_MODULES:
    sys.modules[mod_name] = mock.Mock()

The first line ensures the module under development is found. The remaining lines are a handy framework for satisfying import requirements for your module.

Note

If you want to import the real code during document generation, you'll need to add it to the read-the-docs requirements file, if it isn't already in your project's requirements.txt file..