Documentation Project For The Grails Web Application Framework
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Grails User/Reference Guide

This is the project for generating the Grails user & reference guide that explains how to build applications with the Grails framework.

Building the Guide

To build the documentation, simply type:

./gradlew docs

Be warned: this command can take a while to complete and you should probably increase your Gradle memory settings by giving the GRADLE_OPTS environment variable a value like

export GRADLE_OPTS="-Xmx512m -XX:MaxPermSize=384m"

Fortunately, you can reduce the overall build time with a couple of useful options. The first allows you to specify the location of the Grails source to use:

./gradlew -Dgrails.home=/home/user/projects/grails-core docs 

The Grails source is required because the guide links to its API documentation and the build needs to ensure it's generated. If you don't specify a grails.home property, then the build will fetch the Grails source - a download of 10s of megabytes. It must then compile the Grails source which can take a while too.

Additionally you can create a file with this variable set:




The other useful option allows you to disable the generation of the API documentation, since you only need to do it once:

./gradlew -Ddisable.groovydocs=true docs

Again, this can save a significant amount of time and memory.

The main English user guide is generated in the build/docs directory, with the guide sub-directory containing the user guide part and the ref folder containing the reference material. To view the user guide, simply open build/docs/index.html.

Contributing Documentation

The publishing system for the user guide is the same as the one for Grails projects. You write your chapters and sections in the gdoc wiki format which is then converted to HTML for the final guide. Each chapter is a top-level gdoc file in the src/<lang>/guide directory. Sections and sub-sections then go into directories with the same name as the chapter gdoc but without the suffix.

The structure of the user guide is defined in the src/<lang>/guide/toc.yml file, which is a [YAML][2] file. This file also defines the (language-specific) section titles. If you add or remove a gdoc file, you must update the TOC as well!

The src/<lang>/ref directory contains the source for the reference sidebar. Each directory is the name of a category, which also appears in the docs. Hence the directories need different names for the different languages. Inside the directories go the gdoc files, whose names match the names of the methods, commands, properties or whatever that the files describe.


This project can host multiple translations of the user guide, with src/en being the main one. To add another one, simply create a new language directory under src and copy into it all the files under src/en. The build will take care of the rest.

Once you have a copy of the original guide, you can use the {hidden} macro to wrap the English text that you have replaced, rather than remove it. This makes it easier to compare changes to the English guide against your translation. For example:

When you create a Grails application with the [create-app|commandLine] command,
Grails doesn't automatically create an Ant @build.xml@ file but you can generate
one with the [integrate-with|commandLine] command:

Quando crias uma aplicação Grails com o comando [create-app|commandLine], Grails
não cria automaticamente um ficheiro de construção Ant @build.xml@ mas podes gerar
um com o comando [integrate-with|commandLine]:

Because the English text remains in your gdoc files, 'diff' will show differences on the English lines. You can then use the output of 'diff' to see which bits of your translation need updating. On top of that, the {hidden} macro ensures that the text inside it is not displayed in the browser, although you can display it by adding this URL as a bookmark: javascript:toggleHidden(); (requires you to build the user guide with Grails 2.0 M2 or later).

You can build specific translations very easily using the publishGuide_* and publishPdf_* tasks. For example, to build both the French HTML and PDF user guides, simply execute

./gradlew publishPdf_fr

Each translation is generated in its own directory, so for example the French guide will end up in build/docs/fr. You can then view the translated guide by opening build/docs/<lang>/index.html.