Create configuration variables to support multi-block work
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	dmaza
	Sep 18 2023, 5:42 PM

Description

We need the following config variables in core to allow for a multi-stage migration

$wgEnableMultiBlocks: when this is false, the number of blocks of a given target is limited to 1. Default false
$wgBlockTargetMigrationStage: a combination of SCHEMA_COMPAT_xxx flags. Default SCHEMA_COMPAT_OLD

Review parent task migration plan (https://phabricator.wikimedia.org/T346293) for more context, and a high-level overview of the migration plan.

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	multiblocks: add config variables to support multiblock	mediawiki/core	master	+74 -0

Status	Subtype	Assigned	Task
Open		None	T204903 Epic ⚡️ unprioritized Partial Blocks features
Open	BUG REPORT	None	T25310 Global suppression does not work properly when the target has already been locally blocked
Resolved		• JWheeler-WMF	T366388 Multiblocks: Edit and Remove a block
Resolved		dmaza	T349689 Admins should be able to edit an active block without needing to delete it first
Resolved		• JWheeler-WMF	T194697 Multiblocks — Allow for multiple, simultaneous blocks with different expiration dates
Resolved	Aug 21 2018	dbarratt	T201692 Prepare a technical plan for Multi-blocks
Declined		None	T202572 Create Migration Plan from current schema to Multi-block schema
Resolved		None	T202673 RFC: Multiblocks - let admins create multiple, overlapping blocks on a single user
Resolved		tstarling	T345683 Review of MediaWiki block-related code
Resolved		tstarling	T346293 ipblocks schema redesign for multiblocks
Resolved		HMonroy	T346671 Create configuration variables to support multi-block work
Resolved		tstarling	T349883 Multiblocks support in ApiBlockInfoTrait and ApiQueryBlockInfoTrait
Open		None	T351508 Decide the limit of multiblocks
Open		None	T351511 How to deal with redundant block