MediaWiki 1.19/Communications

Communications plan
Aim: spread the word that the deployments are gonna probably be coming in February, and tell them 3 things:
 * 1) test now!!  on the test deployment site for your wiki!  I'm especially looking at you, Commons or sites with unusual gadgets or something!
 * 2) Do you have some unusual technical thing -- user scripts, gadgets, unique bots, etc. -- set up on your wiki such that we should stagger you in a different stage than we had thought?


 * Initial heads-up sent by Sumana to wikitech-l, wikitech-ambassadors

Pre-deployment heads-up distribution list

 * Wikimedia tech blog ✅
 * mail:wikimediaannounce-l, mail:wikitech-l, mail:wikitech-ambassadors, mail:translators-l
 * m:Global message delivery

Pre-deployment heads-up message


MediaWiki 1.19 deployment to Wikimedia sites: Test it before it breaks

Wikimedia engineers are putting the final touches to the latest version of MediaWiki, the software that powers Wikipedia and its sister sites. This version, labeled "1.19wmf1", will be deployed to Wikimedia sites in stages, starting next week.

We've recently [//blog.wikimedia.org/2012/01/28/beta-cluster-test-software-before-deployment/ set up a Beta cluster], replicating a selection of Wikimedia wikis, where Wikimedians have tested the new version and checked that it worked reasonably well with their local wiki's specific customizations.

Things are looking good, and the current plan is to run the deployment in five stages between February 15th and March 1st, 2012. The schedule may change based on unexpected issues, so you should refer to the MediaWiki 1.19 roadmap for an up-to-date schedule of when your wiki will be affected.

Many new features and bug fixes brought by MediaWiki 1.19 are back-end, behind-the-scenes changes, for example infrastructure work to support our ongoing move to Swift as our media storage platform.

There are also more visible improvements, like better diff readability for colorblind people, and better support of the user's gender and language in the interface. A list of all changes is available in the [//svn.wikimedia.org/viewvc/mediawiki/branches/REL1_19/phase3/RELEASE-NOTES-1.19?view=markup draft release notes].

Check JavaScript and Gadgets compatibility with ResourceLoader

A particular area of improvement in MediaWiki 1.19 relates to JavaScript. While most of the legacy site scripts, user scripts and gadgets will continue to work, it's also possible that the new version be less forgiving of assumptions and errors in code. For example, faster load times may uncover errors in scripts that don't explicitly declare the modules they're using.

Furthermore, a new version of ResourceLoader will be deployed later this year, that will bring improvements specific to gadgets, but will require gadgets to be made compatible with ResourceLoader.

Gadgets maintainers are therefore strongly advised to start upgrading their scripts now, to avoid major disruption later. The migration guide to ResourceLoader is the main document for Gadget developers; a list of JavaScript deprecations and default modules are available as well.

You can also join the 2011 Resource Walker, an attempt to go through all Wikimedia wikis and update outdated JavaScript. An IRC workshop is planned to facilitate the process; more information will be posted later on this blog.

Moving towards transparent upgrades

As we move towards more frequent software upgrades, we expect them to be less and less painful — and ideally, at some point they'll go so smoothly that users won't even notice them, except for the new features that will appear. We're not completely there yet, but we've made progress in the past year or so, and we're committed to continue our efforts, both for the benefits of developers and users.

In the meantime, please bear with us if, despite our efforts, you encounter issues due to the upgrade; we'll try and fix them as soon as we can. It's not too late to visit the Beta cluster and report issues there or in our bug tracker. The more people test beforehand, the smoother the deployment should go.

Deployment notice

 * Generic maintenance notice ✅, continue to update translations
 * m:Wikimedia maintenance notice ✅
 * Set up SiteNotices for phases 1, 2 & 4
 * Set up CentralNotice for phases 3 & 5.
 * Set up social media announces

1.19 release
Channels: mediawiki-l, mediawiki-announce, Wikimedia blog, social media channels. See also Release checklist