Hi! Now that Extension:TemplateData loads the list of used hooks from the extension.json file, did it become clear that the extension has been using an undocumented hook for almost half a year now. You added ParserFetchTemplateData in 956367fb9071 in last November; could you please create its documentation at Manual:Hooks/ParserFetchTemplateData? Thanks in advance!
Topic on User talk:SSastry (WMF)
We are still not sure if we want to support that officially. It is currently a hack for now and it may go away. So, we didn't want to give it more first-class status till it is clear what will happen with it. But if it really matters, we can document it and note that it is not meant to be used by anyone outside Parsoid since it might go away.
I see. I’m not sure what the best solution in this case is; probably going back to the previous status quo and manually providing the hook list manually on the extension page as template parameters (with a wikitext comment explaining the situation)? I’d really like to see an explanatory comment in the extension.json file as well—lack of comments is exactly why I hate the hype of having JSON as a configuration file format, it’s simply not suitable for that purpose. :(
@Tacsipacsi: The fact that the hook is undocumented does not mean that it does not exist, and the extension does not use it. If the hook has no documentation, then Manual:Hooks/ParserFetchTemplateData should be created with {{Undocumented MediaWiki Hook}}, rather than including a list of hooks in Wikitext which is doomed to fall out of date. (And I know that will happen because it did; I converted the page to load hooks from the repo as part of a batch cleanup of Category:ResourceLoaderTestModules extensions after phab:T232875