{section: Read the Docs Overview}

In 2019 we migrated the HTCondor Manual from our old LaTeX format into the Sphinx documentation generator using the reStructuredText format. We will also be hosting it on Read the Docs. The manual can be found here:

http://htcondor.readthedocs.io

{section: Prerequisites}

1: Install Python. Any version is fine.
*::https://www.python.org/downloads

1: Install Sphinx. The recommended way to install Sphinx is via pip:
{code}
sudo pip install sphinx sphinx_rtd_theme
{endcode}
On RHEL and CentOS *we do not support* installing Sphinx from yum or RPM. The available package is an old version which does not support all our extensions.
For other Linux distributions, Windows and macOS, you can find instructions here:
*::https://www.sphinx-doc.org/en/master/usage/installation.html

1: Install the HTCondor Python bindings.
This could be via =pip= (make sure you get the right version, e.g. =pip install htcondor==8.8.1=), or by editing your =PYTHONPATH= environment variable to point at the =.so= files inside your HTCondor install.
Note: on RTD itself, the docs are built using the =htcondor= version specified in =docs/requirements.txt=.

1: Install the Python pathlib module:
{code}
sudo pip install pathlib
{endcode}

1: [Optional] Install https://pypi.org/project/sphinx-autobuild/. This is useful if you're making lots of quick edits to the manual and expect to build it many times.
{code}
sudo pip install sphinx-autobuild
{endcode}
See below for instructions on using =sphinx-autobuild=.

{section: Building}

{subsection: Building and previewing the manual locally}

*:: The manual pages exist in our git repository under the =/docs= folder
*:: Each top-level section of the manual has a corresponding subdirectory with the same name. For example, all the content for "Overview" is under =/docs/overview=, the content for "User's Manual" is under =/docs/users-manual=, and so on.
*:: Each page of the manual has a corresponding file with the same name and a .rst extension. For example, the content for the "Overview > Exceptional Features" page is in =/docs/overview/exceptional-features.rst=
*:: To make a local build of the manual, go to your =/docs= folder and run:
{code}
make html
{endcode}
*:: To preview your build, open a web browser and go to the following URL:
=file:///<path-to-condor-src>/docs/_build/html/index.html=
*:: To clean your local build, go to your =/docs= folder and run:
{code}
make clean
{endcode}

{subsection: Using sphinx-autobuild to build and preview}

Instead of the instructions in the previous section, go to =/docs= and run
{code}
sphinx-autobuild . _build/html
{endcode}
You will see a log of the Sphinx build running, and eventually will be provided a link to a =localhost= webserver hosting the docs.
Leave this program running: =sphinx-autobuild= will watch the docs source tree for changes and rebuild when it detects changes (you will still need to manually reload the page inside your web browser).

{subsection: Different versions of the manual}

*:: Read the Docs allows us to host multiple versions of the manual. We'll have two separate versions: "latest" (equivalent to Development Release) and "stable" (equivalent to Stable Release).
*:: To make edits to the latest version, make your changes on the *master* branch.
*:: To make edits to the stable version, make your changes to the *V8_8-branch* (or the appropriate *V8_8_X-branch* if making your changes after code freeze)

{section: Editing}

The manual now uses the reStructuredText (rST) format, which is similar to Markdown markup but considerably more powerful. A helpful reference to reStructuredText is available here:

http://docutils.sourceforge.net/docs/user/rst/quickref.html

In addition, the new manual also uses the Sphinx documentation generator. Sphinx does many useful things such as:

*:: Converts reStructuredText files into HTML websites, PDF, EPUB and man pages.
*:: Extends rST to provide more complex inline widgets such as tables of contents, syntax-colored code blocks, internal links and references,
*:: Automatic indices, search and language-specific module indices
*:: Provides a powerful API for writing custom extensions

A full Sphinx reference is available here:

http://www.sphinx-doc.org/en/master/contents.html

This section provides some markup style guidelines, as well as information about how we use both built-in and custom tools.

{subsection: Section Titles}

Section titles are very fluid in rST and there are many different ways to make them. To keep things as consistent as possible, try to use the following:

{code}
Page titles get underlined with the = symbol
============================================

Section titles get underlined with the - symbol
-----------------------------------------------

Subsection titles get underlined with the ' symbol
''''''''''''''''''''''''''''''''''''''''''''''''''
{endcode}

{subsection: Indentation}

The rST format is very sensitive to indentation. Paragraphs and other blocks of text are expected to be left-aligned. Indenting a block by any amount of whitespace (compared to the preceding block) causes it to get indented.

{code}
This is a top-level block of text. It will appear aligned to the left-most side of the page.

 This paragraph is indented by one space. Even though it's only a single space,
 it will render as a full first-level indent.

  This paragraph is indented by one more space than the one above it. As a
  result it will render as a second-level indent.

    This time I've indented a block by two more spaces the one above it. It
    doesn't matter that this is inconsistent with the single-space indents
    above. This block will render as a third-level indent.

Back to the top level!

            This block is indented by 12 spaces. However, as with the previous
            examples, the amount of whitespace doesn't matter. Because it's the
            first indented block compared to the preceding block, it will only
            render as a first-level indent.
{endcode}

{subsection: Linking to gittrac tickets}

Use the following syntax to automatically link to a gittrac ticket, where #### is the number of the ticket:

{code}
:ticket:`####`
{endcode}

{subsection: Adding index entries}

To add a basic index entry, use the following syntax:

{code}
:index:`Name of index entry`
{endcode}

If you want your index entry to appear under a parent entry, the syntax is a little more complicated:

{code}
:index:`Name of index entry <single: Name of index entry; Name of parent entry>`
{endcode}

{subsection: Linking to internal documents}

To add a link to an internal document, the syntax looks like =:doc:`/path/to/page-title`=. For example, to link to the Overview > Exceptional Features section, add the following:

{code}
:doc:`/overview/exceptional-features`
{endcode}

By default, the link text will be the name of the page. If you want to add custom text, it looks something like the following:

{code}
:doc:`Here is my custom text link </overview/exceptional-features>`
{endcode}

{section: Publishing}

{subsection: Publishing the manual onto Read the Docs}

*:: Currently Mark or Josh has to login to Read the Docs to manually push any changes.

{subsection: Different versions of the manual}

*:: To make changes to the devel/latest version of the manual, put all your changes in the master branch.
*:: To make changes to the stable version of the manual, you need to add a tag called "stable" to the commit in V8_8-branch that contains the changes you want. To update the stable tag to a new commit, run the following:
{code}
git tag --delete stable
git push --delete origin tag stable
git tag stable
git push origin stable
{endcode}

{subsection: Generating man pages}

*:: The files in =/docs/man-pages= will be the official source for our man pages going forward.
*:: Sphinx can generate the man pages automatically. They will get output by default to the =/docs/_build/man= folder. From the =/docs= folder, run:
{code}
make man
{endcode}