Help:Extension:Translate/Group configuration example

This tutorial is for developers and advanced translation administrators. This tutorial explains how to create new configuration files for software interface message translation, detailing the practical aspects of it. It is to be used together with the link>Special:MyLanguage/Help:Extension:Translate/Group configuration|group configuration reference manual and the developers of the Translate extension will gladly help you with any questions you have after working through this tutorial.

Prerequisites

 * Install MediaWiki
 * the Translate extension and
 * it.

This tutorial has been created based on Translate extension revision r97948 (2011-09-23).

This tutorial describes the process of enabling translation for some parts of the MyBB project. You can follow similar steps to add other projects/files for translation. Some things are specific to translatewiki.net and you should naturally use what is relevant in your case, instead of following the steps of this tutorial blindly.

Step 1: Check out source code
Let's check out the MyBB source code using  as working directory, which is   in this example.

cd /home/betawiki/projects svn co http://svn.mybboard.net/mybb/branches/1.6-stable mybb

sudo -u betawiki svn co http://svn.mybboard.net/mybb/branches/1.6-stable mybb

Now we need to find the files containing the messages. They are in the  subdirectory, and you can find the English source messages under the   subdirectory.

So let's start with  , the first localisation file of our project.

Step 2: File Format Support
In our MediaWiki installation directory, under  and   [https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/extensions/Translate.git;a=tree;f=ffs;hb=HEAD] we can see the classes for file format support, which are used to map message groups to localisation files of each project. You have to do a bit digging to actually see what kind of formats are supported. So we just decide to try and use FlatPhpFFS class first and see how well it works with our PHP file.

So we have a file to map and we have chosen the FFS class for it. Now we need to write a group configuration. That is a YAML file.

In the you can find a link to. Let's start with the minimal file given as example for the BASIC section.

We can go ahead and just replace the example text with our own values.

The description accepts all wikitext syntax. One nice trick shown in the original example is that you can make it translatable by using  . But then you need to define the default text in the page  Mediawiki:Message-key . Note that the namespace ID is added through its constant, see manual>Manual:Using_custom_namespaces#Creating_a_custom_namespace|how to use custom namespaces.

We need one more thing: the  section. Again starting from the example provided in the documentation:

Hmm,  is the language code, like   by default. For now, we do not want to change the directory structure used by MyBB. Instead we can use a feature designed for this purpose: the code map, which allows us to map language codes of each language to the identifiers used by our project.

So we end up with:

Basically this says that for code, the   in above will be  , which is the directory for the English message files. The key  is usually the same as , but without the   prefix.

Good. Now let's save this file somewhere, for example to the same folder where  is stored, with name. The whole file is:

Then we must tell our extension to read that file. Add the following line to :

After doing this, follow the instructions at Help:Extension:Translate/Group management to run the   script.

So let's log in, make sure the user has the "translate-manage" right configured properly, and go to Special:ManageMessageGroups.

You may see this:

No valid namespace defined, got NS_MYBB. Backtrace: <...>

In this case, reading the documentation carefully, you could have identified the need to add the following line to  to register the new namespace with MediaWiki:

In this example 1246 is used, but you can pick any free namespace number you need. For the Translate extension, we recommend you to use the even namespace numbers <tvar|1200-1298>1200-1298</>.

If you now reload the ManageMessageGroups special page, you should see a line which says:

MyBB This message group has not been imported previously.

Click on the MyBB link. After that, you will see the list of messages that are in that file. If you are happy with the results, click "Execute".

After you click "Execute", the file is processed and you will see an output similar to this:

Imported new version of page MyBB:L\x5b'boardstats'\x5d/en. Imported new version of page MyBB:L\x5b'new posts'\x5d/en. Imported new version of page MyBB:L\x5b'no new posts'\x5d/en. ... Cache rebuild. All done!

If the file is very large, you need to run <tvar|code> </> first, because the web interface can only import a limited number of messages at once because of the PHP timeout limit; if you encounter this limit, you can click a button at the bottom of the page to import the remaining messages.

Step 3: Adding another file
Now let's add a second file for MyBB for translation. There are two ways to do this:

Approach 1: Adding a new YAML file
Simply add a new YAML file and save it with a new name. Then call it from inside  and follow all the above steps. The file will look something like this:

As obvious in the above example, you have to use a different ID for this new group.

While easy, this approach does not scale to hundreds of different translation units (i.e. files mapped to their message group). At some point you need to update some value, and doing it for all those files is no fun. Fortunately there is another way, shown below.

Approach 2: TEMPLATE syntax
The idea is that we pull common values into a template. Then each group will take missing values from the template and there is no need to repeat them for every group.

Let's get back to MyBB example. Let's say you want to include,   and   in the translatable messages. The YAML file needs to be updated like this:

As obvious in the above example,  is defined only once; addition and removal of files is as easy as adding or removing a section in the above file.

Now if you go to the ManageMessageGroups special page, you will see three items like this:

MyBB global messages: This message group has not been imported previously. MyBB index page: This message group has not been imported previously. MyBB show thread: This message group has not been imported previously.

If there are a lot of files to be included in your project, it may be a good idea to write a script that generated your YAML file for you.

An example can be found in <tvar|page>trunk/translatewiki/StatusNet/genStatusNet-plugins.php</>.

Step 4: Aggregate group
Adding an aggregate group and defining the message files as its subgroups has two benefits:


 * Less work for translators to select different message groups, in particular for maintenance work. Translators can simply open the aggregate group and translate or update everything that needs updating or translation for all the groups.
 * Statistics can be reported on the aggregate group level, i.e. whole project.

In order to define an aggregate group, you need to add the following section right after the TEMPLATE section and before the definition of individual subgroups:

This gets us pretty close, but there is still one step missing. At this point, if you go to Special:Translate, you will see the MyBB parent group (and it in fact works!) but also the subgroups listed as separate groups. :(

This is the way to fix it. Add the following line to your :

$wgTranslateGroupStructure['/^out-mybb/'] = array( 'mybb' );



This takes all groups whose id match the given pattern, shows the first group, and hides everything else below that first group. A bit ugly, but it works. This construction only supports two layers, even though aggregate groups can be part of aggregate groups.

If you go to Special:Translate now, you will only see the parent group MyBB listed. Additionally, you will see a link "Show 3 subgroups"; clicking on that will show you the names of subgroups.

Check out the manual for TAGS>Special:MyLanguage/Help:Extension:Translate/Group configuration#TAGS</>|TAGS and other sections we didn't go through in this document.

Step 5: Cleaning up
YAML files of projects supported by translatewiki.net are committed to the <tvar|git-file></> repository on Git.

In translatewiki.net, the  lines are actually in. Sandboxwiki at translatewiki.net does not have a  file, which is why we added everything in.