arm-trusted-firmware/docs/getting_started/docs-build.rst
Harrison Mutai c61c9a31c0 build(poetry): wrap docs build in poetry
Simplify building documentation by wrapping the Sphinx command inside
a Poetry environment.  Previously, the developer had to manually
activate Poetry and install the docs group.  This change makes the
process consistent with other build targets and reduces user error.
Falls back gracefully if Poetry is not installed.

Change-Id: I1dfea58314253773bec5e2c70d27e2216e3143d9
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
2025-06-02 07:38:43 +00:00

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Building Documentation
======================
To create a rendered copy of this documentation locally you can use the
`Sphinx`_ tool to build and package the plain-text documents into HTML-formatted
pages.
If you are building the documentation for the first time then you will need to
check that you have the required software packages, as described in the
*Prerequisites* section that follows.
.. note::
An online copy of the documentation is available at
https://www.trustedfirmware.org/docs/tf-a, if you want to view a rendered
copy without doing a local build.
Prerequisites
-------------
For building a local copy of the |TF-A| documentation you will need:
- Python 3 (3.8 or later)
- PlantUML (1.2017.15 or later)
- `Poetry`_ (Python dependency manager)
- Optionally, the `Dia`_ application can be installed if you need to edit
existing ``.dia`` diagram files, or create new ones.
Below is an example set of instructions to get a working environment (tested on
Ubuntu):
.. code:: shell
sudo apt install python3 python3-pip plantuml [dia]
curl -sSL https://install.python-poetry.org | python3 -
Building rendered documentation
-------------------------------
The documentation can be compiled into HTML-formatted pages from the project
root directory by running:
.. code:: shell
make doc
Output from the build process will be placed in: ``docs/build/html``.
Other Output Formats
~~~~~~~~~~~~~~~~~~~~
We also support building documentation in other formats. From the ``docs``
directory of the project, run the following command to see the supported
formats.
.. code:: shell
make -C docs help
To build the documentation in PDF format, additionally ensure that the following
packages are installed:
- FreeSerif font
- latexmk
- librsvg2-bin
- xelatex
- xindy
Below is an example set of instructions to install the required packages
(tested on Ubuntu):
.. code:: shell
sudo apt install fonts-freefont-otf latexmk librsvg2-bin texlive-xetex xindy
Once all the dependencies are installed, run the command ``poetry run make -C
docs latexpdf`` to build the documentation. Output from the build process
(``trustedfirmware-a.pdf``) can be found in ``docs/build/latex``.
Building rendered documentation from Poetry's virtual environment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If Poetry is installed, the ``doc`` target wraps its build steps with ``poetry
run``, which runs the specified command within the project's virtual
environment. The easiest way to activate this environment manually is by using
the ``poetry shell`` command.
Running ``poetry shell`` from the directory containing this project, activates
the same virtual environment. This creates a sub-shell through which you can
build the documentation directly with ``make``.
.. code:: shell
poetry shell
make -C docs html
Type ``exit`` to deactivate the virtual environment and exit this new shell. For
other use cases, please see the official `Poetry`_ documentation.
Building rendered documentation from a container
------------------------------------------------
There may be cases where you can not either install or upgrade required
dependencies to generate the documents, so in this case, one way to
create the documentation is through a docker container. The first step is
to check if `docker`_ is installed in your host, otherwise check main docker
page for installation instructions. Once installed, run the following script
from project root directory
.. code:: shell
docker run --rm -v $PWD:/tf-a sphinxdoc/sphinx \
bash -c 'cd /tf-a &&
apt-get update && apt-get install -y curl plantuml &&
curl -sSL https://install.python-poetry.org | python3 - &&
~/.local/bin/poetry run make doc'
The above command fetches the ``sphinxdoc/sphinx`` container from `docker
hub`_, launches the container, installs documentation requirements and finally
creates the documentation. Once done, exit the container and output from the
build process will be placed in: ``docs/build/html``.
--------------
*Copyright (c) 2019-2025, Arm Limited. All rights reserved.*
.. _Sphinx: http://www.sphinx-doc.org/en/master/
.. _Poetry: https://python-poetry.org/docs/
.. _pip homepage: https://pip.pypa.io/en/stable/
.. _Dia: https://wiki.gnome.org/Apps/Dia
.. _docker: https://www.docker.com/
.. _docker hub: https://hub.docker.com/repository/docker/sphinxdoc/sphinx