148 lines
4.6 KiB
XML
148 lines
4.6 KiB
XML
<chapter xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude"
|
|
version="5.0"
|
|
xml:id="sec-writing-documentation">
|
|
|
|
<title>Writing NixOS Documentation</title>
|
|
|
|
<para>
|
|
As NixOS grows, so too does the need for a catalogue and explanation
|
|
of its extensive functionality. Collecting pertinent information
|
|
from disparate sources and presenting it in an accessible style
|
|
would be a worthy contribution to the project.
|
|
</para>
|
|
|
|
<section>
|
|
<title>Building the Manual</title>
|
|
<para>
|
|
The DocBook sources of the <xref linkend="book-nixos-manual"/> are in the
|
|
<link xlink:href="https://github.com/NixOS/nixpkgs/tree/master/nixos/doc/manual"><filename>nixos/doc/manual</filename></link>
|
|
subdirectory of the Nixpkgs repository. If you make modifications to
|
|
the manual, it's important to build it before committing. You can do
|
|
that as follows:
|
|
|
|
<screen>nix-build nixos/release.nix -A manual.x86_64-linux</screen>
|
|
</para>
|
|
|
|
<para>
|
|
When this command successfully finishes, it will tell you where the
|
|
manual got generated. The HTML will be accessible through the
|
|
<filename>result</filename> symlink at
|
|
<filename>./result/share/doc/nixos/index.html</filename>.
|
|
</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Editing DocBook XML</title>
|
|
|
|
<para>
|
|
For general information on how to write in DocBook, see
|
|
<link xlink:href="http://www.docbook.org/tdg5/en/html/docbook.html">
|
|
DocBook 5: The Definitive Guide</link>.
|
|
</para>
|
|
|
|
<para>
|
|
Emacs nXML Mode is very helpful for editing DocBook XML because it
|
|
validates the document as you write, and precisely locates
|
|
errors. To use it, see <xref linkend="sec-emacs-docbook-xml"/>.
|
|
</para>
|
|
|
|
<para>
|
|
<link xlink:href="http://pandoc.org">Pandoc</link> can generate
|
|
DocBook XML from a multitude of formats, which makes a good starting
|
|
point.
|
|
|
|
<example xml:id="ex-pandoc-xml-conv">
|
|
<title>Pandoc invocation to convert GitHub-Flavoured MarkDown to DocBook 5 XML</title>
|
|
<screen>pandoc -f markdown_github -t docbook5 docs.md -o my-section.md</screen>
|
|
</example>
|
|
|
|
Pandoc can also quickly convert a single
|
|
<filename>section.xml</filename> to HTML, which is helpful when
|
|
drafting.
|
|
</para>
|
|
|
|
<para>
|
|
Sometimes writing valid DocBook is simply too difficult. In this
|
|
case, submit your documentation updates in a <link
|
|
xlink:href="https://github.com/NixOS/nixpkgs/issues/new">GitHub
|
|
Issue</link> and someone will handle the conversion to XML for you.
|
|
</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Creating a Topic</title>
|
|
|
|
<para>
|
|
You can use an existing topic as a basis for the new topic or create a topic from scratch.
|
|
</para>
|
|
|
|
<para>
|
|
Keep the following guidelines in mind when you create and add a topic:
|
|
|
|
<itemizedlist>
|
|
<listitem><para>
|
|
The NixOS <link xlink:href="http://www.docbook.org/tdg5/en/html/book.html"><tag>book</tag></link>
|
|
element is in <filename>nixos/doc/manual/manual.xml</filename>.
|
|
It includes several
|
|
<link xlink:href="http://www.docbook.org/tdg5/en/html/book.html"><tag>part</tag>s</link>
|
|
which are in subdirectories.
|
|
</para></listitem>
|
|
|
|
<listitem><para>
|
|
Store the topic file in the same directory as the <tag>part</tag>
|
|
to which it belongs. If your topic is about configuring a NixOS
|
|
module, then the XML file can be stored alongside the module
|
|
definition <filename>nix</filename> file.
|
|
</para></listitem>
|
|
|
|
<listitem><para>
|
|
If you include multiple words in the file name, separate the words
|
|
with a dash. For example: <filename>ipv6-config.xml</filename>.
|
|
</para></listitem>
|
|
|
|
<listitem><para>
|
|
Make sure that the <tag>xml:id</tag> value is unique. You can use
|
|
abbreviations if the ID is too long. For example:
|
|
<varname>nixos-config</varname>.
|
|
</para></listitem>
|
|
|
|
<listitem><para>
|
|
Determine whether your topic is a chapter or a section. If you are
|
|
unsure, open an existing topic file and check whether the main
|
|
element is chapter or section.
|
|
</para></listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Adding a Topic to the Book</title>
|
|
|
|
<para>
|
|
Open the parent XML file and add an <varname>xi:include</varname>
|
|
element to the list of chapters with the file name of the topic that
|
|
you created. If you created a <tag>section</tag>, you add the file to
|
|
the <tag>chapter</tag> file. If you created a <tag>chapter</tag>, you
|
|
add the file to the <tag>part</tag> file.
|
|
</para>
|
|
|
|
<para>
|
|
If the topic is about configuring a NixOS module, it can be
|
|
automatically included in the manual by using the
|
|
<varname>meta.doc</varname> attribute. See <xref
|
|
linkend="sec-meta-attributes"/> for an explanation.
|
|
</para>
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</chapter>
|