action to invoke a manual update check for the Kotlin plugin

idea/src/META-INF/plugin.xml

@@ -91,6 +91,12 @@
       <add-to-group group-id="KotlinToolsGroup"/>
     </action>
 
+    <action id="KotlinCheckForUpdates" class="org.jetbrains.kotlin.idea.actions.CheckPluginUpdatesAction"
+            text="Check for Kotlin plugin updates"
+            description="Check if a new version of the Kotlin plugin is available and prompt to install it">
+      <add-to-group group-id="KotlinToolsGroup"/>
+    </action>
+
     <action id="ShowKotlinBytecode" class="org.jetbrains.kotlin.idea.actions.ShowKotlinBytecodeAction"
             text="Show Kotlin Bytecode">
       <add-to-group group-id="KotlinToolsGroup"/>

idea/src/org/jetbrains/kotlin/idea/KotlinPluginUpdater.kt

@@ -58,18 +58,18 @@ class KotlinPluginUpdater(val propertiesComponent: PropertiesComponent) : Dispos
         }
     }
 
-    private fun queueUpdateCheck() {
+    fun queueUpdateCheck(reportNoUpdates: Boolean = false) {
         if (ApplicationManager.getApplication().isUnitTestMode) return
 
         ApplicationManager.getApplication().assertIsDispatchThread()
         if (!checkQueued) {
             checkQueued = true
-            alarm.addRequest({ updateCheck() }, updateDelay)
+            alarm.addRequest({ updateCheck(reportNoUpdates) }, updateDelay)
             updateDelay *= 2 // exponential backoff
         }
     }
 
-    private fun updateCheck() {
+    private fun updateCheck(reportNoUpdates: Boolean) {
         try {
             var (mainRepoUpdateSuccess, latestVersionInRepository) = getPluginVersionFromMainRepository()
             var descriptorToInstall: IdeaPluginDescriptor? = null
@@ -101,6 +101,15 @@ class KotlinPluginUpdater(val propertiesComponent: PropertiesComponent) : Dispos
                         notifyPluginUpdateAvailable(latestVersionInRepository!!, descriptorToInstall, hostToInstallFrom)
                     }
                 }
+                else if (reportNoUpdates) {
+                    ApplicationManager.getApplication().invokeLater {
+                        val notification = notificationGroup.createNotification(
+                                "Kotlin",
+                                "You have the latest version of the Kotlin plugin",
+                                NotificationType.INFORMATION, null)
+                        notification.notify(null)
+                    }
+                }
             }
             else {
                 ApplicationManager.getApplication().invokeLater { queueUpdateCheck() }

idea/src/org/jetbrains/kotlin/idea/actions/CheckPluginUpdatesAction.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.actions
+
+import com.intellij.openapi.actionSystem.AnAction
+import com.intellij.openapi.actionSystem.AnActionEvent
+import org.jetbrains.kotlin.idea.KotlinPluginUpdater
+
+class CheckPluginUpdatesAction : AnAction() {
+    override fun actionPerformed(e: AnActionEvent) {
+        KotlinPluginUpdater.getInstance().queueUpdateCheck(true)
+    }
+}