Maniphest T111720

Purge articles on image updates
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	• Gilles
	Sep 7 2015, 7:55 PM

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T111048: New URL scheme for service-generated thumbnails will likely force us to purge articles where images are used when said images are updated. This will help us ensure that in the new scheme, articles that haven't been updated since the images they contain have don't display stale/broken images.

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		Status	Subtype	Assigned	Task
		Resolved		• Gilles	T121388 Service-based thumbnailing re-architecture in production with Thumbor
		Resolved		• Gilles	T111718 Service-based thumbnailing re-architecture on Vagrant
		Invalid		• Gilles	T111720 Purge articles on image updates

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• Gilles created this task.Sep 7 2015, 7:55 PM

• Gilles claimed this task.

• Gilles raised the priority of this task from to Medium.

• Gilles updated the task description. (Show Details)

• Gilles added a project: Performance-Team.

• Gilles added subscribers: • Gilles, Aklapper.

• Gilles moved this task from Inbox, needs triage to Backlog: Maintenance, non-prioritized on the Performance-Team board.Sep 7 2015, 7:58 PM

Already implemented crosswiki by @aaron in 2013 and enabled for Commons ($wgGlobalUsagePurgeBacklinks).

And this also works on local wikis through HTMLCacheUpdate calls.

I'm not sure why this was needed originally, presumably for states other than updates (deletion, etc.), but it suits our purposes well.