Maniphest T419183

Skip HydrateHeaderPlaceholders stage unless there are actual headers placeholders
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Authored By

	cscott
	Mar 5 2026, 11:27 PM

Description

The header placeholder system is an incomplete part of MultiContent Revisions (MCR). T200915: Allow SlotRoleHandlers to control page layout describes how it is intended to work in the future.

In the meantime, we should add a parser output flag so that we can skip the "hydrate header placeholders" output transform stage unless there are actually header placeholders in the output.

Details

Related Changes in Gerrit:

Subject	Repo	Branch	Lines +/-
Skip HydrateHeaderPlaceholders stage unless slot headers are present	mediawiki/core	master	+16 -8
ParserOutputFlags: add HAS_SLOT_HEADERS	mediawiki/core	REL1_45	+8 -0
ParserOutputFlags: add HAS_SLOT_HEADERS	mediawiki/core	REL1_44	+9 -0
ParserOutputFlags: add HAS_SLOT_HEADERS	mediawiki/core	REL1_43	+9 -0
ParserOutputFlags: add HAS_SLOT_HEADERS	mediawiki/core	master	+8 -0

Customize query in gerrit

Related Objects

Mentioned Here: T200915: Allow SlotRoleHandlers to control page layout

Event Timeline

cscott created this task.Mar 5 2026, 11:27 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMar 5 2026, 11:27 PM

Change #1248634 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@master] Skip HydrateHeaderPlaceholders stage unless slot headers are present

https://gerrit.wikimedia.org/r/1248634

gerritbot added a project: Patch-For-Review.Mar 5 2026, 11:38 PM

Change #1254221 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@master] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1254221

Change #1254221 merged by jenkins-bot:

[mediawiki/core@master] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1254221

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.21; 2026-03-24).Mar 17 2026, 9:01 PM

Change #1255028 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@REL1_45] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255028

Change #1255035 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@REL1_44] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255035

Change #1255037 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@REL1_43] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255037

Change #1255037 merged by jenkins-bot:

[mediawiki/core@REL1_43] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255037

Change #1255028 merged by jenkins-bot:

[mediawiki/core@REL1_45] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255028

Change #1255035 merged by jenkins-bot:

[mediawiki/core@REL1_44] ParserOutputFlags: add HAS_SLOT_HEADERS

https://gerrit.wikimedia.org/r/1255035

ReleaseTaggerBot added projects: MW-1.43-notes, MW-1.45-notes, MW-1.44-notes.Mar 18 2026, 10:01 PM

Change #1248634 merged by jenkins-bot: