# Dependencies

[Pandoc](http://johnmacfarlane.net/pandoc/installing.html), a universal
document converter, is required to generate docs as HTML from Rust's
source code.

[Node.js](http://nodejs.org/) is also required for generating HTML from
the Markdown docs (reference manual, tutorials, etc.) distributed with
this git repository.

[po4a](http://po4a.alioth.debian.org/) is required for generating translated
docs from the master (English) docs.

[GNU gettext](http://www.gnu.org/software/gettext/) is required for managing
the translation data.

# Building

To generate all the docs, just run `make docs` from the root of the repository.
This will convert the distributed Markdown docs to HTML and generate HTML doc
for the 'std' and 'extra' libraries.

To generate HTML documentation from one source file/crate, do something like:

~~~~
rustdoc --output-dir html-doc/ --output-format html ../src/libstd/path.rs
~~~~

(This, of course, requires a working build of the `rustdoc` tool.)

# Additional notes

To generate an HTML version of a doc from Markdown without having Node.js
installed, you can do something like:

~~~~
pandoc --from=markdown --to=html5 --number-sections -o rust.html rust.md
~~~~

(rust.md being the Rust Reference Manual.)

The syntax for pandoc flavored markdown can be found at:
http://johnmacfarlane.net/pandoc/README.html#pandocs-markdown

A nice quick reference (for non-pandoc markdown) is at:
http://kramdown.rubyforge.org/quickref.html

# Notes for translators

To start the translation for a new language, see po4a.conf at first.

To generate .pot and .po files, do something like:

~~~~
po4a --copyright-holders="The Rust Project Developers" \
    --package-name="Rust" \
    --package-version="0.10-pre" \
    -M UTF-8 -L UTF-8 \
    po4a.conf
~~~~

(the version number must be changed if it is not 0.10-pre now.)

Now you can translate documents with .po files, commonly used with gettext. If
you are not familiar with gettext-based translation, please read the online
manual linked from http://www.gnu.org/software/gettext/ . We use UTF-8 as the
file encoding of .po files.

When you want to make a commit, do the command below before staging your
change:

~~~~
for f in doc/po/**/*.po; do
    msgattrib --untranslated $f -o $f.strip
    if [ -e $f.strip ]; then
       mv $f.strip $f
    else
       rm $f
    fi
done
~~~~ 

This removes untranslated entries from .po files to save disk space.