Fix infinite restart loop when disabled toolkit 2.x cannot be updated…

.changes/next-release/bugfix-cb4ca29a-a3e2-4ea6-82fb-10bc2fcd8ac5.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Fix infinite restart loop on <=241 when an incompatible version of AWS Toolkit is installed alongside Amazon Q (#4519)"
+}

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/PluginVersionChecker.kt

@@ -21,6 +21,7 @@
 import software.aws.toolkits.jetbrains.AwsToolkit.TOOLKIT_PLUGIN_ID
 import software.aws.toolkits.jetbrains.core.plugin.PluginUpdateManager
 import software.aws.toolkits.resources.message
+import javax.swing.SwingUtilities
 
 class PluginVersionChecker : ApplicationInitializedListener {
     override suspend fun execute(asyncScope: CoroutineScope) {
@@ -51,19 +52,14 @@
 
         // defensively disable the old toolkit if we couldn't update it because we might deadlock during project open
         val toolkit = mismatch.firstOrNull { it.id == TOOLKIT_PLUGIN_ID && it.version?.startsWith("2.") == true }
-        val shouldDisableToolkit = (toolkit != null && updated.none { it == toolkit })
-        if (shouldDisableToolkit) {
-            LOG.info { "Attempting to disable aws.toolkit due to known incompatibility" }
-            val descriptor = toolkit?.descriptor as? IdeaPluginDescriptor
-
-            descriptor?.let {
-                PluginEnabler.getInstance().disable(listOf(descriptor))
-            } ?: LOG.warn { "Expected toolkit descriptor to be IdeaPluginDescriptor, but was ${toolkit?.descriptor}" }
-        }
 
-        if (shouldDisableToolkit || updated.isNotEmpty()) {
+        if (shouldDisableToolkit(toolkit, updated) || updated.isNotEmpty()) {
             LOG.info { "Restarting due to forced update of plugins" }
-            ApplicationManagerEx.getApplicationEx().restart(true)
+
+            // IDE invokeLater is not initialized yet
+            SwingUtilities.invokeLater {
+                ApplicationManagerEx.getApplicationEx().restart(true)
+            }
             return
         }
 
@@ -97,6 +93,26 @@
         }
     }
 
+    private fun shouldDisableToolkit(toolkit: PluginInfo?, updated: List<PluginInfo>): Boolean {
+        if (toolkit != null && updated.none { it == toolkit }) {
+            LOG.info { "Attempting to disable aws.toolkit due to known incompatibility" }
+            val descriptor = toolkit.descriptor as? IdeaPluginDescriptor ?: run {
+                LOG.warn { "Expected toolkit descriptor to be IdeaPluginDescriptor, but was ${toolkit.descriptor}" }
+                return false
+            }
+
+            if (!descriptor.isEnabled) {
+                LOG.info { "Does not need to disable toolkit since it is already disabled" }
+                return false
+            }
+
+            PluginEnabler.getInstance().disable(listOf(descriptor))
+            return true
+        }
+
+        return false
+    }
+
     companion object {
         private val LOG = getLogger<PluginVersionChecker>()
     }