You can, in your php extension code, so not inside the extension.json, check, if another extension is installed or not:
ExtensionRegistry::getInstance()->isLoaded( 'ExtensionName' ); There's also a "requires" section, which is parsed in extension.json, but it currently only supports MediaWiki core versions (it behaves like composer's requires section). I'm wondering, if dependencies like yours are widely used and if extending the requires section support to extensions would help to solve your problem (with that you could specify a specific version, a range of version or any version above a specific one, or all versions, too, so your VIKIJS_VERSION wouldn't be needed anymore, too). Would you like to open a task in phabricator to discuss this? Best, Florian -----Ursprüngliche Nachricht----- Von: Wikitech-l [mailto:wikitech-l-boun...@lists.wikimedia.org] Im Auftrag von Jason Ji Gesendet: Freitag, 30. Oktober 2015 17:00 An: wikitech-l@lists.wikimedia.org Betreff: [Wikitech-l] MW 1.25 new extension registration - PHP constants Hi there, I'm the primary developer of the VIKI <https://www.mediawiki.org/wiki/Extension:VIKI> extension and its two companion extensions, VikiSemanticTitle <https://www.mediawiki.org/wiki/Extension:VikiSemanticTitle> and VikiTitleIcon <https://www.mediawiki.org/wiki/Extension:VikiTitleIcon>. I thought I'd take a look at converting these three extensions to the new extension registration <https://www.mediawiki.org/wiki/Manual:Extension_registration> format, but I ran into a problem. According to the documentation, the new extension registration does not support PHP constants <https://www.mediawiki.org/wiki/Manual:Extension_registration/Limitations>. I use a PHP constant to declare an explicit dependency on VIKI for VikiSemanticTitle and VikiTitleIcon. In my VIKI.php file, I declare: *define( 'VIKIJS_VERSION', '1.3');* And then in VikiSemanticTitle and VikiTitleIcon, I have a check that looks something like: *if( !defined( 'VIKIJS_VERSION' ) ) {* * die('Error: The extension VikiSemanticTitle requires VIKI to be installed first.');* *}* (As an aside, I also happen to use VIKIJS_VERSION as my version number, which I increment as I release new versions. But that's not as important.) Because the new extension registration format doesn't support PHP constants, this no longer works, and I can't run VikiSemanticTitle and VikiTitleIcon alongside VIKI - the VIKIJS_VERSION constant is seemingly no longer defined, so any page load dies with the error message above. If I can't use PHP constants anymore, does anyone have a better recommendation for declaring explicit dependencies? Or should I just avoid migrating the VIKI extensions to the new registration format? Thanks, -- Jason Ji jason.y...@gmail.com _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
