Configure additional async functions

[swsnr]

Hello,

I'm using the new async FileDialog in Gtk. Unfortunately, the heuristic ts-for-gir employs to detect async functions doesn't catch Gtk.FileDialog.open and Gtk.FileDialog.select_folder (I guess it's because they're missing the _async suffix?). To work around this issue I have to cast to convince Typescript that I do indeed get a promise back, e.g.

 const file = await (Gtk.FileDialog.new().select_folder(
        this.root as Gtk.Window,
        null,
) as unknown as Promise<Gio.File>)

That's not nice, but I understand that the introspection metadata ts-for-gir relies on currently doesn't expose any markers for async functions, so it's hard or even impossible to detect all async functions.

As an alternative, I'd be cool if we could specify additional promisified functions explicitly in configuration, e.g. mapping type names to a list of promisified function names mapped to the corresponding start and finish functions.

{
  "promisifyFunctions": {
    "Gio.FileDialog": [
      "select_open": ["select_folder", "select_folder_finish"]
    ]
  }
}

Would that be a desirable change? If so I could look into making a pull request. As far as I can see it shouldn't be too hard; GirModule.overloadPromisifiedFunctions would just need to make an extra lookup into this new config map and generate the extra overload.

[JumpLink]

Hi @swsnr, yes, we could do it that way 👍

[swsnr]

Cool, I'll look into making a pull request, but might take a while.