FIR IDE: warn about enabled Android plugin

idea/idea-fir/src/org/jetbrains/kotlin/idea/fir/AndroidPluginWarningApplicationService.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.fir
+
+import com.intellij.ide.plugins.PluginManagerCore
+import com.intellij.notification.Notification
+import com.intellij.notification.NotificationDisplayType
+import com.intellij.notification.NotificationType
+import com.intellij.notification.NotificationsConfiguration
+import com.intellij.openapi.extensions.PluginId
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.startup.StartupActivity
+
+class AndroidPluginIncompatibilityCheckerStartupActivity : StartupActivity.DumbAware {
+    override fun runActivity(project: Project) {
+        NotificationsConfiguration.getNotificationsConfiguration()
+            .register(
+                AndroidPluginWarningNotification.ID,
+                NotificationDisplayType.STICKY_BALLOON,
+                true
+            )
+        if (PluginManagerCore.getPlugin(PluginId.getId(ANDROID_PLUGIN_ID))?.isEnabled == true) {
+            AndroidPluginWarningNotification().notify(project)
+        }
+    }
+
+    companion object {
+        private const val ANDROID_PLUGIN_ID = "org.jetbrains.android"
+    }
+}
+
+private class AndroidPluginWarningNotification : Notification(
+    ID,
+    ID,
+    "Android Plugin is incompatible with FIR IDE. Please, consider disabling Android plugin. Otherwise, Kotlin resolve may not work.",
+    NotificationType.ERROR,
+) {
+    companion object {
+        const val ID = "Android Plugin is incompatible with FIR IDE"
+    }
+}

idea/resources-fir/META-INF/plugin.xml

@@ -116,6 +116,9 @@ The Kotlin FIR plugin provides language support in IntelliJ IDEA and Android Stu
   <extensions defaultExtensionNs="com.intellij">
     <!-- fir-specific -->
     <statusBarWidgetFactory implementation="org.jetbrains.kotlin.idea.fir.FirStatusBarWidgetFactory"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.fir.AndroidPluginIncompatibilityCheckerStartupActivity"/>
+
+
     <projectService serviceInterface="org.jetbrains.kotlin.idea.frontend.api.KtAnalysisSessionProvider"
                         serviceImplementation="org.jetbrains.kotlin.idea.frontend.api.fir.KtFirAnalysisSessionProvider"/>
     <applicationService serviceInterface="org.jetbrains.kotlin.idea.references.KotlinReferenceProviderContributor"