Postpone migration till indexes are ready (KT-26428)

#KT-26428 Fixed

idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/GradleMigrateTest.kt

@@ -9,21 +9,26 @@ import com.intellij.openapi.application.runReadAction
 import com.intellij.openapi.application.runWriteAction
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiManager
+import com.intellij.util.concurrency.FutureResult
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.LanguageVersion
 import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent
+import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent.MigrationTestState
 import org.jetbrains.kotlin.idea.configuration.MigrationInfo
 import org.jetbrains.kotlin.test.testFramework.runInEdtAndWait
+import org.jetbrains.plugins.gradle.tooling.annotation.TargetVersions
 import org.junit.Assert
 import org.junit.Test
+import java.lang.IllegalStateException
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.TimeoutException
 
 class GradleMigrateTest : GradleImportingTestCase() {
     @Test
+    @TargetVersions("4.4+")
     fun testMigrateStdlib() {
-        createProjectSubFile("settings.gradle", "include ':app'")
-        val gradleFile = createProjectSubFile(
-            "app/build.gradle",
-            """
+        val migrateComponentState = doMigrationTest(
+            beforeText = """
             buildscript {
                 repositories {
                     jcenter()
@@ -39,9 +44,38 @@ class GradleMigrateTest : GradleImportingTestCase() {
             dependencies {
                 compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
             }
-            """.trimIndent()
+            """,
+
+            afterText =
+            """
+            buildscript {
+                repositories {
+                    jcenter()
+                    mavenCentral()
+                }
+                dependencies {
+                    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.0"
+                }
+            }
+
+            apply plugin: 'kotlin'
+
+            dependencies {
+                compile "org.jetbrains.kotlin:kotlin-stdlib:1.2.0"
+            }
+            """
         )
 
+        Assert.assertEquals(
+            MigrationInfo.create("1.1.0", ApiVersion.KOTLIN_1_2, LanguageVersion.KOTLIN_1_2, newStdlibVersion = "1.2.0"),
+            migrateComponentState?.migrationInfo
+        )
+    }
+
+    private fun doMigrationTest(beforeText: String, afterText: String): MigrationTestState? {
+        createProjectSubFile("settings.gradle", "include ':app'")
+        val gradleFile = createProjectSubFile("app/build.gradle", beforeText.trimIndent())
+
         importProject()
 
         val document = runReadAction {
@@ -51,34 +85,25 @@ class GradleMigrateTest : GradleImportingTestCase() {
 
         runInEdtAndWait {
             runWriteAction {
-                document.setText(
-                    """
-                    buildscript {
-                        repositories {
-                            jcenter()
-                            mavenCentral()
-                        }
-                        dependencies {
-                            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.0"
-                        }
-                    }
-
-                    apply plugin: 'kotlin'
-
-                    dependencies {
-                        compile "org.jetbrains.kotlin:kotlin-stdlib:1.2.0"
-                    }
-                    """.trimIndent()
-                )
+                document.setText(afterText.trimIndent())
             }
         }
 
+        val importResult = FutureResult<MigrationTestState?>()
+        val migrationProjectComponent = KotlinMigrationProjectComponent.getInstance(myProject)
+
+        migrationProjectComponent.setImportFinishListener { migrationState ->
+            importResult.set(migrationState)
+        }
+
         importProject()
 
-        val actualMigrationInfo = KotlinMigrationProjectComponent.getInstance(myProject).requestLastMigrationInfo()
-
-        Assert.assertEquals(
-            MigrationInfo.create("1.1.0", ApiVersion.KOTLIN_1_2, LanguageVersion.KOTLIN_1_2, newStdlibVersion = "1.2.0"),
-            actualMigrationInfo)
+        return try {
+            importResult.get(5, TimeUnit.SECONDS)
+        } catch (te: TimeoutException) {
+            throw IllegalStateException("No reply with result from migration component")
+        } finally {
+            migrationProjectComponent.setImportFinishListener(null)
+        }
     }
 }

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinMigrationProjectComponent.kt

@@ -31,13 +31,15 @@ import org.jetbrains.kotlin.idea.migration.CodeMigrationAction
 import org.jetbrains.kotlin.idea.migration.CodeMigrationToggleAction
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.util.application.runReadAction
+import org.jetbrains.kotlin.idea.util.runReadActionInSmartMode
 import org.jetbrains.kotlin.idea.versions.LibInfo
 
 class KotlinMigrationProjectComponent(val project: Project) {
+    @Volatile
     private var old: MigrationState? = null
-    private var new: MigrationState? = null
 
-    private var lastMigrationInfo: MigrationInfo? = null
+    @Volatile
+    private var importFinishListener: ((MigrationTestState?) -> Unit)? = null
 
     init {
         val connection = project.messageBus.connect()
@@ -46,59 +48,73 @@ class KotlinMigrationProjectComponent(val project: Project) {
         })
     }
 
-    @Synchronized
+    class MigrationTestState(val migrationInfo: MigrationInfo?)
+
     @TestOnly
-    fun requestLastMigrationInfo(): MigrationInfo? {
-        val temp = lastMigrationInfo
-        lastMigrationInfo = null
-        return temp
+    fun setImportFinishListener(newListener: ((MigrationTestState?) -> Unit)?) {
+        synchronized(this) {
+            if (newListener != null && importFinishListener != null) {
+                importFinishListener!!.invoke(null)
+            }
+
+            importFinishListener = newListener
+        }
+    }
+
+    private fun notifyFinish(migrationInfo: MigrationInfo?) {
+        importFinishListener?.invoke(MigrationTestState(migrationInfo))
     }
 
-    @Synchronized
     fun onImportAboutToStart() {
         if (!CodeMigrationToggleAction.isEnabled(project) || !hasChangesInProjectFiles(project)) {
             old = null
             return
         }
 
-        lastMigrationInfo = null
-
         old = MigrationState.build(project)
     }
 
-    @Synchronized
     fun onImportFinished() {
-        if (!CodeMigrationToggleAction.isEnabled(project)) {
+        if (!CodeMigrationToggleAction.isEnabled(project) || old == null) {
+            notifyFinish(null)
             return
         }
 
-        if (old == null) return;
+        ApplicationManager.getApplication().executeOnPooledThread {
+            var migrationInfo: MigrationInfo? = null
 
-        new = MigrationState.build(project)
-
-        val migrationInfo = prepareMigrationInfo(old, new) ?: return
-
-        old = null
-        new = null
-
-        if (ApplicationManager.getApplication().isUnitTestMode) {
-            lastMigrationInfo = migrationInfo
-            return
-        }
-
-        ApplicationManager.getApplication().invokeLater {
-            val migrationNotificationDialog = MigrationNotificationDialog(project, migrationInfo)
-            migrationNotificationDialog.show()
-
-            if (migrationNotificationDialog.isOK) {
-                val action = ActionManager.getInstance().getAction(CodeMigrationAction.ACTION_ID)
-
-                val dataContext = getDataContextFromDialog(migrationNotificationDialog)
-                if (dataContext != null) {
-                    val actionEvent = AnActionEvent.createFromAnAction(action, null, ActionPlaces.ACTION_SEARCH, dataContext)
-
-                    action.actionPerformed(actionEvent)
+            try {
+                val new = project.runReadActionInSmartMode {
+                    MigrationState.build(project)
                 }
+
+                val localOld = old.also {
+                    old = null
+                } ?: return@executeOnPooledThread
+
+                migrationInfo = prepareMigrationInfo(localOld, new) ?: return@executeOnPooledThread
+
+                if (ApplicationManager.getApplication().isUnitTestMode) {
+                    return@executeOnPooledThread
+                }
+
+                ApplicationManager.getApplication().invokeLater {
+                    val migrationNotificationDialog = MigrationNotificationDialog(project, migrationInfo)
+                    migrationNotificationDialog.show()
+
+                    if (migrationNotificationDialog.isOK) {
+                        val action = ActionManager.getInstance().getAction(CodeMigrationAction.ACTION_ID)
+
+                        val dataContext = getDataContextFromDialog(migrationNotificationDialog)
+                        if (dataContext != null) {
+                            val actionEvent = AnActionEvent.createFromAnAction(action, null, ActionPlaces.ACTION_SEARCH, dataContext)
+
+                            action.actionPerformed(actionEvent)
+                        }
+                    }
+                }
+            } finally {
+                notifyFinish(migrationInfo)
             }
         }
     }