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# 25.4 Updating the Documentation Set

Documentation is an integral part of the FreeBSD operating system. While an up-to-date version of the FreeBSD Documentation Set is always available on the FreeBSD web site, some users might have slow or no permanent network connectivity. There are several ways to update the local copy of documentation with the latest FreeBSD Documentation Set.

## 25.4.1 Using Subversion to Update the Documentation

The FreeBSD documentation sources can be obtained with svn. This section describes how to:

- Install the documentation toolchain, the tools that are required to rebuild the FreeBSD documentation from its source.

- Download a copy of the documentation source at `/usr/doc`, using svn.

- Rebuild the FreeBSD documentation from its source, and install it under `/usr/share/doc`.

- Recognize some of the build options that are supported by the build system of the documentation, such as the options that build only some of the different language translations of the documentation or the options that select a specific output format.

## 25.4.2 Installing svn and the Documentation Toolchain

Rebuilding the FreeBSD documentation from source requires a collection of tools which are not part of the FreeBSD base system due to the amount of disk space these tools use. They are also not useful to all FreeBSD users, only those users that are actively writing new documentation for FreeBSD or are frequently updating their documentation from source.

The required tools, including svn, are available in the `textproc/docproj` meta-port developed by the FreeBSD Documentation Project.

> Note: When no PostScript® or PDF documentation required, one might consider installing the `textproc/docproj-nojadetex` port instead. This version of the documentation toolchain includes everything except the teTeX typesetting engine. teTeX is a very large collection of tools, so it may be quite sensible to omit its installation if PDF output is not really necessary.

## 25.4.3 Updating the Documentation Sources

In this example, svn is used to fetch a clean copy of the documentation sources from the western US mirror using the HTTPS protocol:

    # svn checkout https://svn0.us-west.FreeBSD.org/doc/head /usr/doc

Select the closest mirror from the available Subversion mirror sites.

The initial download of the documentation sources may take a while. Let it run until it completes.

Future updates of the documentation sources may be fetched by running:

    # svn update /usr/doc

After checking out the sources, an alternative way of updating the documentation is supported by the `/usr/doc/Makefile` by running the following commands:

    # cd /usr/doc
    # make update

## 25.4.4 Tunable Options of the Documentation Sources

The updating and build system of the FreeBSD documentation set supports a few options that ease the process of updating only parts of the documentation, or the build of specific translations. These options can be set either as system-wide options in `/etc/make.conf`, or as command-line options passed to make(1).

The options include:

`DOC_LANG`

  The list of languages and encodings to build and install, such as `en_US.ISO8859-1` for English documentation.

`FORMATS`

  A single format or a list of output formats to be built. Currently, `html`, `html-split`, `txt`, `ps`, `pdf`, and `rtf` are supported.

`DOCDIR`

  Where to install the documentation. It defaults to `/usr/share/doc`.

For more `make` variables supported as system-wide options in FreeBSD, refer to make.conf(5).

For more `make` variables supported by the build system of the FreeBSD documentation, refer to the FreeBSD Documentation Project Primer for New Contributors.

## 25.4.5 Installing the FreeBSD Documentation from Source

Once an up-to-date snapshot of the documentation sources has been fetched to `/usr/doc`, everything is ready for an update of the installed documentation.

A full update of all the languages defined in `DOC_LANG` may be performed by typing:

    # cd /usr/doc
    # make install clean

If an update of only a specific language is desired, make(1) can be invoked in a language specific subdirectory of `/usr/doc`:

    # cd /usr/doc/en_US.ISO8859-1
    # make update install clean

The output formats that will be installed may be specified by setting `FORMATS`:

    # cd /usr/doc
    # make FORMATS='html html-split' install clean

For information on editing and submitting corrections to the documentation, refer to the FreeBSD Documentation Project Primer for New Contributors.

## 25.4.6 Using Documentation Ports

Based on the work of Marc Fonvieille.

The previous section presented a method for updating the FreeBSD documentation from sources. Source based updates may not be feasible or practical for all FreeBSD systems as building the documentation sources requires the documentation toolchain, a certain level of familiarity with svn and source checkouts from a repository, and a few manual steps to build the checked out sources. This section describes an alternative method which uses the Ports Collection and makes it possible to:

- Download and install pre-built snapshots of the documentation, without having to locally build anything or install the documentation toolchain.

- Download the documentation sources and build them through the ports framework, making the checkout and build steps a bit easier.

These two methods of updating the FreeBSD documentation are supported by a set of documentation ports, updated by the Documentation Engineering Team `<doceng@FreeBSD.org>` on a monthly basis. These are listed in the FreeBSD Ports Collection, under the docs category.

### 25.4.6.1 Building and Installing Documentation Ports

The documentation ports use the ports building framework to make documentation builds easier. They automate the process of checking out the documentation source, running make(1) with the appropriate environment settings and command-line options, and they make the installation or deinstallation of documentation as easy as the installation of any other FreeBSD port or package.

> Note: As an extra feature, when the documentation ports are built locally, they record a dependency to the documentation toolchain ports, so that they are also automatically installed.

Organization of the documentation ports is as follows:

- The “master port”, `misc/freebsd-doc-en`, which installs all of the English documentation ports.

- The “all in one port”, `misc/freebsd-doc-all`, builds and installs all documentation in all available languages.

- There is a “slave port” for each translation, such as `misc/freebsd-doc-hu` for the Hungarian-language documents.

For example, to build and install the English documentation in split HTML format, similar to the format used on http://www.FreeBSD.org, to `/usr/local/share/doc/freebsd`, install the following port

    # cd /usr/ports/misc/freebsd-doc-en
    # make install clean

#### 25.4.6.1.1 Common Knobs and Options

There are many options for modifying the default behavior of the documentation ports, including:

`WITH_HTML`

  Builds the HTML format with a single HTML file per document. The formatted documentation is saved to a file called `article.html`, or `book.html`, as appropriate, plus images.

`WITH_PDF`

  Builds the Adobe® Portable Document Format (PDF). The formatted documentation is saved to a file called `article.pdf` or `book.pdf`, as appropriate.

`DOCBASE`

  Specifies where to install the documentation. It defaults to `/usr/local/share/doc/freebsd`.

  > Note: The default target directory differs from the directory used svn. This is because ports are usually installed within `/usr/local`. This can be overridden by using `PREFIX`.

This example uses variables to install the Hungarian documentation as a PDF:

    # cd /usr/ports/misc/freebsd-doc-hu
    # make -DWITH_PDF DOCBASE=share/doc/freebsd/hu install clean

### 25.4.6.2 Using Documentation Packages

Building the documentation ports from source, as described in the previous section, requires a local installation of the documentation toolchain and a bit of disk space for the build of the ports. When resources are not available to install the documentation toolchain, or because the build from sources would take too much disk space, it is still possible to install pre-built snapshots of the documentation ports.

The Documentation Engineering Team `<doceng@FreeBSD.org>` prepares monthly snapshots of the FreeBSD documentation packages. These binary packages can be used with any of the bundled package tools, like pkg_add(1), pkg_delete(1), and so on.

> Note: When binary packages are used, the FreeBSD documentation will be installed in all available formats for the given language.

For example, the following command will install the latest pre-built package of the Hungarian documentation:

    # pkg_add -r hu-freebsd-doc

> Note: Packages use a format that differs from the corresponding port's name: ``lang`-freebsd-doc`, where `lang` is the short format of the language code, such as `hu` for Hungarian, or `zh_cn` for Simplified Chinese.

### 25.4.6.3 Updating Documentation Ports

Documentation ports can be updated like any other port. For example, the following command updates the installed Hungarian documentation using `ports-mgmt/portmaster` by using packages only:

    # portmaster -PP hu-freebsd-doc

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