* Modified ResourceLoader to lazy-initialise module objects, for a further performance advantage.
* Deleted ResourceLoader::getModules(), provided getModuleNames() instead. Although the startup module needs this functionality, it's slow to generate, so to avoid misuse, it's better to provide a foolproof fast interface and let the startup module do the slow thing itself.
* Modified ResourceLoader::register() to optionally accept an info array instead of an object.
* Added $wgResourceModules, allowing extensions to efficiently define their own resource loader modules. The trouble with hooks is that they contain code, and code is slow. We've been through all this before with i18n. Hooks are useful as a performance tool only if you call them very rarely.
* Moved ResourceLoader settings to their own section in DefaultSettings.php
* Added options to ResourceLoaderFileModule equivalent to the $localBasePath and $remoteBasePath parameters, to allow it to be instantiated via the new array style. Also added remoteExtPath, which allows modules to be registered before $wgExtensionAssetsPath is known.
* Added OutputPage::getResourceLoader(), mostly for debugging.
* The time saving at the moment is about 5ms per request with no extensions, which is significant already with 6 load.php requests for a cold cache page view. This is a much more scalable interface; the relative saving will grow as more extensions are added which use this interface, especially for non-APC installs.
Although the interface is backwards compatible, extension updates will follow in a subsequent commit.
* Interpreted some Trevor-speak in the doc comment of ResourceLoader::preloadModuleInfo().
* Made setMsgBlobMtime() (called from preloadModuleInfo()) actually work, by making getMsgBlobMtime() use the cached blob times if they are available.
* Modified Xml::encodeJsVar() to allow it to pass through JS expressions without encoding, using a special object.
* In ResourceLoader::makeModuleResponse(), renamed $messages to $messagesBlob to make it clear that it's JSON-encoded, not an array.
* Fixed MessageBlobStore to store {} for an empty message array instead of [].
* In ResourceLoader::makeMessageSetScript(), fixed call to non-existent function mediaWiki.msg.set.
* For security, changed the calling convention of makeMessageSetScript() and makeLoaderImplementScript() to require explicit object construction of XmlJsCode() before interpreting their input as JS code.
* Documented several ResourceLoader static functions.
* In ResourceLoaderWikiModule, for readability, reduced the indenting level by flipping some if blocks and adding continue statements.
* In makeCustomLoaderScript(), allow non-numeric $version. The only caller I can find is already sending a non-numeric $version, presumably it was broken. Luckily there aren't any loader scripts in existence, I had to make one to test it.
* wfGetDb -> wfGetDB
* Added an extra line break in the startup module output, for readability.
* In ResourceLoaderStartUpModule::getModuleRegistrations(), fixed another assignment expression
* Break long lines.
* Convert long or unnecessary ternary operator usages to if/else.
* Fixed excessively clever assignment expressions.
* Rename $cache to $cacheEntry.
* Removed unnecessary web invocation guards. Their perlish form was making me uncomfortable. BTW, unlike in Perl, die() is not a function, it's a special case in the PHP grammar which very roughly simulates the Perl syntax:
die "x"; // works
0 || die("x"); // works
0 || (die); // works
0 || (die "x"); // fail!
