Configure Kotlin: add mavenCentral() to repositories

Since kotlin stdlib depends on artifacts from mavenCentral() we should add it
 #KT-18719 Fixed

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/GroovyBuildScriptManipulator.kt

@@ -67,6 +67,7 @@ class GroovyBuildScriptManipulator(private val groovyScript: GroovyFile) : Gradl
 
         groovyScript.getRepositoriesBlock().apply {
             addRepository(version)
+            addMavenCentralIfMissing()
         }
 
         groovyScript.getDependenciesBlock().apply {
@@ -90,6 +91,7 @@ class GroovyBuildScriptManipulator(private val groovyScript: GroovyFile) : Gradl
 
             getBuildScriptRepositoriesBlock().apply {
                 addRepository(version)
+                addMavenCentralIfMissing()
             }
 
             getBuildScriptDependenciesBlock().apply {
@@ -211,6 +213,9 @@ class GroovyBuildScriptManipulator(private val groovyScript: GroovyFile) : Gradl
         return addLastExpressionInBlockIfNeeded(snippet)
     }
 
+    private fun GrClosableBlock.addMavenCentralIfMissing(): Boolean =
+            if (!isRepositoryConfigured(text)) addLastExpressionInBlockIfNeeded(MAVEN_CENTRAL) else false
+
     private fun GrStatementOwner.getRepositoriesBlock() = getBlockOrCreate("repositories")
 
     private fun GrStatementOwner.getDependenciesBlock(): GrClosableBlock = getBlockOrCreate("dependencies")

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinBuildScriptManipulator.kt

@@ -39,7 +39,11 @@ class KotlinBuildScriptManipulator(private val kotlinScript: KtFile) : GradleBui
                 addExpressionAfterIfMissing("$GSK_KOTLIN_VERSION_PROPERTY_NAME = \"$version\"", it)
             }
 
-            getRepositoriesBlock()?.addRepositoryIfMissing(version)
+            getRepositoriesBlock()?.apply {
+                addRepositoryIfMissing(version)
+                addMavenCentralIfMissing()
+            }
+
             getDependenciesBlock()?.addPluginToClassPathIfMissing()
         }
 
@@ -57,7 +61,11 @@ class KotlinBuildScriptManipulator(private val kotlinScript: KtFile) : GradleBui
             script?.blockExpression?.addDeclarationIfMissing("val $GSK_KOTLIN_VERSION_PROPERTY_NAME: String by extra", true)
             getApplyBlock()?.createPluginIfMissing(kotlinPluginName)
             getDependenciesBlock()?.addCompileStdlibIfMissing(stdlibArtifactName)
-            getRepositoriesBlock()?.addRepositoryIfMissing(version)
+            getRepositoriesBlock()?.apply {
+                addRepositoryIfMissing(version)
+                addMavenCentralIfMissing()
+            }
+
             jvmTarget?.let {
                 changeKotlinTaskParameter("jvmTarget", it, forTests = false)
                 changeKotlinTaskParameter("jvmTarget", it, forTests = true)
@@ -223,6 +231,9 @@ class KotlinBuildScriptManipulator(private val kotlinScript: KtFile) : GradleBui
         return addExpressionIfMissing(snippet) as? KtCallExpression
     }
 
+    private fun KtBlockExpression.addMavenCentralIfMissing(): KtCallExpression? =
+            if (!isRepositoryConfigured(text)) addExpressionIfMissing(MAVEN_CENTRAL) as? KtCallExpression else null
+
     private fun KtBlockExpression.addPluginToClassPathIfMissing(): KtCallExpression? =
             addExpressionIfMissing(getKotlinGradlePluginClassPathSnippet()) as? KtCallExpression
 

idea/testData/configuration/android-gradle/missedRepositoriesInBuildscriptBlock_after.gradle

@@ -8,6 +8,7 @@ buildscript {
         maven {
             url 'http://oss.sonatype.org/content/repositories/snapshots'
         }
+        mavenCentral()
     }
 }
 apply plugin: 'android'

idea/testData/configuration/gradle/eapVersion/build_after.gradle

@@ -21,6 +21,7 @@ buildscript {
         maven {
             url 'http://dl.bintray.com/kotlin/kotlin-eap'
         }
+        mavenCentral()
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

idea/testData/configuration/gradle/m04Version/build_after.gradle

@@ -21,6 +21,7 @@ buildscript {
         maven {
             url 'http://dl.bintray.com/kotlin/kotlin-eap-1.1'
         }
+        mavenCentral()
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

idea/testData/configuration/gradle/rcVersion/build_after.gradle

@@ -21,6 +21,7 @@ buildscript {
         maven {
             url 'http://dl.bintray.com/kotlin/kotlin-eap'
         }
+        mavenCentral()
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

idea/testData/configuration/gsk/eap11Version/build_after.gradle.kts

@@ -9,6 +9,7 @@ buildscript {
         maven {
             setUrl("http://dl.bintray.com/kotlin/kotlin-eap-1.1")
         }
+        mavenCentral()
     }
     dependencies {
         classpath(kotlinModule("gradle-plugin", kotlin_version))

idea/testData/configuration/gsk/eapVersion/build_after.gradle.kts

@@ -8,6 +8,7 @@ buildscript {
         maven {
             setUrl("http://dl.bintray.com/kotlin/kotlin-eap")
         }
+        mavenCentral()
     }
     dependencies {
         classpath(kotlinModule("gradle-plugin", kotlin_version))