firefox-main: analyze Typescript projects with scip-typescript

[nicolas-guichard]

This analyzes all folders which have a tsconfig.json or jsconfig.json with scip-typescript.

[nicolas-guichard]

This is up on kdab.searchfox.org. @asutherland I think it would make sense to gather some feedback from impacted users before landing this?

[asutherland]

We definitely will want feedback from people, although I think a key ingredient will be to be able to convey what's actually using scip-typescript and what isn't. A JS subsystem I like to use a lot of the time for looking at JS analysis because I end up using it a lot and it also potentially has a lot of C++ crossings contains AsyncShutdown.sys.mjs and nsAsyncShutdown.sys.mjs but they were not indexed by scip-typescript (as can be quickly determined by looking at the raw analysis records and the symbol naming scheme.)

To figure out what is scip-typescript, I logged into the server and grepped for "Skipping analysis" in the index-log. I think there were fewer things there than I expected. In terms of making the info available to people, maybe we can run a very simple grep-y step on the log that builds a hacky html page that lists all the files and drops it in /pages/ like where we put the settings page. We could also do something more fancy like put the indexer type in the concise file info and then do a batch file listing page that lists all the files that used that generator.

I found https://kdab.searchfox.org/firefox-main/source/toolkit/components/extensions/ExtensionParent.sys.mjs quite interesting:

• This Services.catMan.enumerateCategory(CATEGORY_EXTENSION_MODULES) ends up linked to the .d.ts but on trunk we have :arai's possible IDL definitions heuristics which can take us directly to the IDL file which is useful and would be a definite regression to lose. So I think we'll want to try and add some kind of transformation there.
• Here in for "load" in lazy.Schemas.load scip-typescript gives us a nice go-to-def whereas on trunk we only have a search.
• But here for "getStartupChanges" in lazy.AddonManager.getStartupChanges scip-typescript only has a search whereas on trunk js-analyze does have a go-to-def.