mirror of
https://github.com/ceph/ceph
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143 lines
3.9 KiB
ReStructuredText
143 lines
3.9 KiB
ReStructuredText
==================
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Documenting Ceph
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==================
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User documentation
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==================
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The documentation on docs.ceph.com is generated from the restructuredText
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sources in ``/doc/`` in the Ceph git repository.
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Please make sure that your changes are written in a way that is intended
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for end users of the software, unless you are making additions in
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``/doc/dev/``, which is the section for developers.
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All pull requests that modify user-facing functionality must
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include corresponding updates to documentation: see
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`Submitting Patches`_ for more detail.
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Check your .rst syntax is working as expected by using the "View"
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button in the github user interface when looking at a diff on
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an .rst file, or build the docs locally using the ``admin/build-doc``
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script.
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For more information about the Ceph documentation, see
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:doc:`/start/documenting-ceph`.
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Code Documentation
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==================
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C and C++ can be documented with Doxygen_, using the subset of Doxygen
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markup supported by Breathe_.
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.. _Doxygen: http://www.doxygen.nl/
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.. _Breathe: https://github.com/michaeljones/breathe
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The general format for function documentation is
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.. code-block:: c
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/**
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* Short description
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*
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* Detailed description when necessary
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*
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* preconditons, postconditions, warnings, bugs or other notes
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*
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* parameter reference
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* return value (if non-void)
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*/
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This should be in the header where the function is declared, and
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functions should be grouped into logical categories. The `librados C
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API`_ provides a complete example. It is pulled into Sphinx by
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`librados.rst`_, which is rendered at :doc:`/rados/api/librados`.
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To generate the doxygen documentation in HTML format use:
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::
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# cmake --build . --target doxygen
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HTML output will be under: ``build-doc/doxygen/html``
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.. _`librados C API`: https://github.com/ceph/ceph/blob/master/src/include/rados/librados.h
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.. _`librados.rst`: https://github.com/ceph/ceph/raw/master/doc/rados/api/librados.rst
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Drawing diagrams
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================
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Graphviz
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--------
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You can use Graphviz_, as explained in the `Graphviz extension documentation`_.
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.. _Graphviz: http://graphviz.org/
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.. _`Graphviz extension documentation`: https://www.sphinx-doc.org/en/master/usage/extensions/graphviz.html
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.. graphviz::
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digraph "example" {
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foo -> bar;
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bar -> baz;
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bar -> th
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}
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Most of the time, you'll want to put the actual DOT source in a
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separate file, like this::
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.. graphviz:: myfile.dot
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Ditaa
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-----
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You can use Ditaa_:
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.. _Ditaa: http://ditaa.sourceforge.net/
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.. ditaa::
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+--------------+ /=----\
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| hello, world |-->| hi! |
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+--------------+ \-----/
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Blockdiag
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---------
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If a use arises, we can integrate Blockdiag_. It is a Graphviz-style
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declarative language for drawing things, and includes:
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- `block diagrams`_: boxes and arrows (automatic layout, as opposed to
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Ditaa_)
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- `sequence diagrams`_: timelines and messages between them
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- `activity diagrams`_: subsystems and activities in them
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- `network diagrams`_: hosts, LANs, IP addresses etc (with `Cisco
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icons`_ if wanted)
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.. _Blockdiag: http://blockdiag.com/en/
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.. _`Cisco icons`: https://pypi.org/project/blockdiagcontrib-cisco/
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.. _`block diagrams`: http://blockdiag.com/en/blockdiag/
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.. _`sequence diagrams`: http://blockdiag.com/en/seqdiag/index.html
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.. _`activity diagrams`: http://blockdiag.com/en/actdiag/index.html
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.. _`network diagrams`: http://blockdiag.com/en/nwdiag/
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Inkscape
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--------
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You can use Inkscape to generate scalable vector graphics.
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https://inkscape.org/en/ for restructedText documents.
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If you generate diagrams with Inkscape, you should
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commit both the Scalable Vector Graphics (SVG) file and export a
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Portable Network Graphic (PNG) file. Reference the PNG file.
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By committing the SVG file, others will be able to update the
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SVG diagrams using Inkscape.
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HTML5 will support SVG inline.
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.. _`Submitting Patches`: https://github.com/ceph/ceph/blob/master/SubmittingPatches.rst
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