Is it possible to unregister registered InspectionSuppressor of some plugin?

[Yoskaldyr]

I found some API, but this code doesn't work

for (suppressor in LanguageInspectionSuppressors.INSTANCE.allForLanguage(HTMLLanguage.INSTANCE)) {
    if (suppressor is XmlInspectionSuppressor) {
        show("found")
        LanguageInspectionSuppressors.INSTANCE.removeExplicitExtension(HTMLLanguage.INSTANCE, suppressor)
    }
}

for (suppressor in LanguageInspectionSuppressors.INSTANCE.allForLanguage(HTMLLanguage.INSTANCE)) {
    if (suppressor is XmlInspectionSuppressor) {
        //still there will show again
        show("found again")
        LanguageInspectionSuppressors.INSTANCE.removeExplicitExtension(HTMLLanguage.INSTANCE, suppressor)
    }
}

[Yoskaldyr]

I asked similar question on the #plugin-live-plugin slack channel, but looks like you don't read it often

[dkandalov]

To be clear, this is more of a question about IntelliJ API rather than live plugin itself 😅

TLDR you probably need something like this:

val ep = ApplicationManager.getApplication()!!.extensionArea
  .getExtensionPoint<LanguageExtensionPoint<InspectionSuppressor>>("com.intellij.lang.inspectionSuppressor")
val xmlSuppressor = ep.extensions.find { it.implementationClass.contains("XmlInspectionSuppressor") }
if (xmlSuppressor != null) {
  ep.unregisterExtension(xmlSuppressor)
}

Although unregisterExtension is deprecated, so maybe the right thing is to ask on YouTrack for better reloadable IntelliJ API 😅

The API you tried using didn't work because I think LanguageInspectionSuppressors.INSTANCE.allForLanguage(...) reloads all extensions from xml, see https://github.com/JetBrains/intellij-community/blob/72efd72cf0f45a39325e4e9900b42a1476576f2a/platform/core-api/src/com/intellij/openapi/util/KeyedExtensionCollector.java#L135 (Btw, I really just opened IntelliJ source code and looked up what it does. It did help that I came across this issue before though.)

There are examples of registering an Intention, Inspection or Action because for them IntelliJ API is a bit cumbersome to use and there is a bit of wrapper code in LivePlugin to make it easier. Overall, the pattern for registering is to use Disposable. When it's disposed, the intention or action is unregistered. This is more tricky with XmlInspectionSuppressor because how do you find which Disposable was used with it 🤷 And I suspect it's registered by built-in xml plugin so the disposable is probably for all extensions of the xml plugin.

I almost forgot about the slack channel 🙈 It not great that there is no history and not sure I like how it was renamed from #live-plugin.

[Yoskaldyr]

Understand. For me discussing bugs and features here is also much better than in slack (all time history is available)