The pre-1.30 version of ParserOptions::optionsHash() was kept
temporarily as ParserOptions::optionsHashPre30() to prevent a cache
stampede on WMF sites when the hash format was changed in I7fb9ffca9.
Now that the cache has been rebuilt, it's no longer needed and we should
clean it up instead of leaving it forever to bitrot.
Change-Id: I037d8dfdefe72a295547bd331bc1454e69cb418d
The handling of the 'editsection' option prior to I7fb9ffca9 was
unusual: it was included in the cache key, but the getter didn't ever
flag it as "used". This was overlooked in I7fb9ffca9.
This fixes the handling to restore that behavior. It's no longer
considered to be a real parser option, so changing it won't make
isSafeToCache() fail while reading it won't flag it as 'used'.
But to keep Wikibase working (see T85252), if 'editsection' is supplied
in $forOptions optionsHash() will still include it in the hash so
whatever Wikibase is doing by forcing that doesn't break. The hash when
it is included is the same as was used in I7fb9ffca9 to reuse keys.
Once optionsHashPre30() is removed, Wikibase should be changed to use
some other method to fix T85252 so we can remove that hack from
optionsHash().
Change-Id: I77b5519c5a1122a1fafbfc523b77b2268c0efeb1
* ParserOptions is reorganized so it knows all the options and their
defaults, and can report whether the non-key options are at their
defaults.
* Definition of the "canonical" ParserOptions (which is unfortunately
different from the "default" ParserOptions) is moved from
ContentHandler to ParserOptions.
* WikiPage uses this to throw an exception if it's asked to cache
with options that aren't used in the cache key.
* ParserCache gets some temporary code to try to avoid a massive cache
stampede on upgrade.
Bug: T110269
Change-Id: I7fb9ffca96e6bd04db44d2d5f2509ec96ad9371f
Depends-On: I4070a8f51927121f690469716625db4a1064dea5
