Change when validation functions are called

[Plochem]

Is there a way to change when my custom validation functions are called? Right now, the appropriate validation function runs every time I modify the DSL, but I only want the function to be called when the user saves the file. Basically, is there something similar to CheckType from xtext?

[msujew]

Hey @Plochem,

we have a very similar concept as the CheckType annotation from Xtext (note that Xtext doesn't actually respect the annotation in the language server use case - at least last I checked in 2020). Whenever you register validations, you can select a category. We currently don't have an example available but you can take a look at our test cases to see how the API is intended to be used.

You can see an example how to call those validations in here. Note that you should wrap the build call in a WorkspaceLock#write call as it's not cancellable otherwise.

Since the validation categories don't have any attached semantics (except for built-in and fast running on every document change) you'll need to take care that the build calls is invoked on the onDidSaveTextDocument callback of the language server connection. See this recent PR (not released yet, that will make it much easier to react on this event) for some more info on how to do that.