Provide and maintain "pattern" to extract configuration information from operations/mediawiki-config
Closed, DeclinedPublic
Actions

Assigned To

Authored By

	scfc
	Jul 26 2015, 6:35 PM

Description

operations/software's maintain-replicas/maintain-replicas.pl parses operations/mediawiki-config's wmf-config/InitialiseSettings.php and queries the online API of the individual wikis to extract information about namespaces or case sensitivity of page titles. This is overly complex for a simple task and introduces a number of possible points of failures (change of syntax, network issues, etc.).

Instead there should be a published and updated pattern on how to extract the information directly in PHP from operations/mediawiki-config. In T50626, @liangent and I played around a bit with something like:

include ($MediaWikiRepoPath . "/includes/Defines.php");
include ($WmfConfigRepoPath . "/wmf-config/InitialiseSettings.php");
var_dump ($wgConf->settings);

but it didn't yield all the wanted information.

A solution that only requires the source code repositories, but no network access & Co. would not only profit maintain-replicas.pl, but also other (Labs and not-Labs) tools that need to query this data.

Related Objects

Mentioned In: T106897: meta_p.wiki table corrupt (contains many NULL entries for 'url' field)
Mentioned Here: T50626: Provide wiki metadata in the databases similar to toolserver.wiki

Event Timeline

scfc created this task.Jul 26 2015, 6:35 PM

scfc raised the priority of this task from to Needs Triage.

scfc updated the task description. (Show Details)

scfc added projects: Wikimedia-Site-requests, MediaWiki-General.

scfc added subscribers: scfc, liangent.

Restricted Application added subscribers: Matanya, Aklapper. · View Herald TranscriptJul 26 2015, 6:35 PM

scfc mentioned this in T106897: meta_p.wiki table corrupt (contains many NULL entries for 'url' field).Jul 26 2015, 6:39 PM

• MZMcBride subscribed.Jul 26 2015, 10:55 PM

You're still not going to be able to catch things that extensions create via hooks/registration callbacks.

but it didn't yield all the wanted information.

What is missing?

Ricordisamoa subscribed.Jul 27 2015, 4:54 AM

The output was just a dump of InitialiseSettings.php, without the "inheritance", so the only information about dewiki for example was the time zone data, because the rest is default.

If I clone mediawiki/core and operations/mediawiki-config and run:

<?php
include ( 'core/includes/Defines.php' );
include ( 'mediawiki-config/wmf-config/CommonSettings.php' );

that fails with:

scfc@tools-bastion-01:/tmp/tmp.dN3AgdCytQ$ php test.php 
No MWMultiVersion instance initialized! MWScript.php wrapper not used?
scfc@tools-bastion-01:/tmp/tmp.dN3AgdCytQ$

Last time IIRC I dug further, but never got it to work. I'm sure this is absurdly trivial to others :-).

Regarding hooks and callbacks, those will be set up in CommonSettings.php, so the information queried should reflect any changes extensions make.

The code in operations/mediawiki-config is not a stable API. Use the actual API. If something that is needed isn't exposed via the API, file a bug for it please.

Declining per @Legoktm

(NB: Declined is fine with me.)

In T106989#1497423, @Legoktm wrote:

The code in operations/mediawiki-config is not a stable API. Use the actual API. If something that is needed isn't exposed via the API, file a bug for it please.

That was what this task was about: Providing a stable "API" for operations/mediawiki-config. Something that can be queried offline, or for a change that is no longer/not yet online, etc., with the results being "stable", i. e. not being influenced by anything that isn't under the control of the person who is running the query.

Provide and maintain "pattern" to extract configuration information from operations/mediawiki-configClosed, DeclinedPublicActions

Description

Related Objects

Event Timeline

Provide and maintain "pattern" to extract configuration information from operations/mediawiki-config
Closed, DeclinedPublic
Actions