.. _west-zephyr-ext-cmds:

Additional Zephyr extension commands
####################################

This page documents miscellaneous :ref:`west-zephyr-extensions`.

.. _west-boards:

Listing boards: ``west boards``
*******************************

The ``boards`` command can be used to list the boards that are supported by
Zephyr without having to resort to additional sources of information.

It can be run by typing::

  west boards

This command lists all supported boards in a default format. If you prefer to
specify the display format yourself you can use the ``--format`` (or ``-f``)
flag::

  west boards -f "{arch}:{name}"

Additional help about the formatting options can be found by running::

  west boards -h

.. _west-zephyr-export:

Installing CMake packages: ``west zephyr-export``
*************************************************

This command registers the current Zephyr installation as a CMake
config package in the CMake user package registry.

In Windows, the CMake user package registry is found in
``HKEY_CURRENT_USER\Software\Kitware\CMake\Packages``.

In Linux and MacOS, the CMake user package registry is found in.
:file:`~/.cmake/packages`.

You may run this command when setting up a Zephyr workspace. If you do,
application CMakeLists.txt files that are outside of your workspace will be
able to find the Zephyr repository with the following:

.. code-block:: cmake

   find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

See :zephyr_file:`share/zephyr-package/cmake` for details.

.. _west-spdx:

Software bill of materials: ``west spdx``
*****************************************

This command generates SPDX 2.2 tag-value documents, creating relationships
from source files to the corresponding generated build files.
``SPDX-License-Identifier`` comments in source files are scanned and filled
into the SPDX documents.

To use this command:

#. Pre-populate a build directory :file:`BUILD_DIR` like this:

   .. code-block:: bash

      west spdx --init -d BUILD_DIR

   This step ensures the build directory contains CMake metadata required for
   SPDX document generation.

#. Build your application using this pre-created build directory, like so:

   .. code-block:: bash

      west build -d BUILD_DIR [...]

#. Generate SPDX documents using this build directory:

   .. code-block:: bash

      west spdx -d BUILD_DIR

This generates the following SPDX bill-of-materials (BOM) documents in
:file:`BUILD_DIR/spdx/`:

- :file:`app.spdx`: BOM for the application source files used for the build
- :file:`zephyr.spdx`: BOM for the specific Zephyr source code files used for the build
- :file:`build.spdx`: BOM for the built output files

Each file in the bill-of-materials is scanned, so that its hashes (SHA256 and
SHA1) can be recorded, along with any detected licenses if an
``SPDX-License-Identifier`` comment appears in the file.

SPDX Relationships are created to indicate dependencies between
CMake build targets, build targets that are linked together, and
source files that are compiled to generate the built library files.

``west spdx`` accepts these additional options:

- ``-n PREFIX``: a prefix for the Document Namespaces that will be included in
  the generated SPDX documents. See `SPDX specification 2.2 section 2.5`_ for
  details. If ``-n`` is omitted, a default namespace will be generated
  according to the default format described in section 2.5 using a random UUID.

- ``-s SPDX_DIR``: specifies an alternate directory where the SPDX documents
  should be written instead of :file:`BUILD_DIR/spdx/`.

- ``--analyze-includes``: in addition to recording the compiled source code
  files (e.g. ``.c``, ``.S``) in the bills-of-materials, also attempt to
  determine the specific header files that are included for each ``.c`` file.

  This takes longer, as it performs a dry run using the C compiler for each
  ``.c`` file using the same arguments that were passed to it for the actual
  build.

- ``--include-sdk``: with ``--analyze-includes``, also create a fourth SPDX
  document, :file:`sdk.spdx`, which lists header files included from the SDK.

.. _SPDX specification 2.2 section 2.5:
   https://spdx.github.io/spdx-spec/2-document-creation-information/