Rewrite Gradle script to us Kotlin DSL, code cleanup

build.gradle.kts

@@ -0,0 +1,59 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    id("java")
+    id("org.jetbrains.kotlin.jvm") version "1.3.72"
+    id("org.jetbrains.intellij") version "0.4.18"
+}
+
+val pluginGroup: String by project
+val pluginName: String by project
+val pluginVersion: String by project
+val ideaVersion: String by project
+val ideaType: String by project
+val sources: String by project
+
+group = pluginGroup
+version = pluginVersion
+
+tasks.withType<JavaCompile> {
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
+}
+listOf("compileKotlin", "compileTestKotlin").forEach {
+    tasks.getByName<KotlinCompile>(it) {
+        kotlinOptions.jvmTarget = "1.8"
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation(kotlin("stdlib-jdk8"))
+}
+
+// https://github.com/JetBrains/gradle-intellij-plugin
+
+intellij {
+    pluginName = pluginName
+    version = ideaVersion
+    type = ideaType
+    updateSinceUntilBuild = false
+    downloadSources = sources.toBoolean()
+    setPlugins("java")
+}
+
+tasks {
+    patchPluginXml {
+        version(pluginVersion)
+//        changeNotes("")
+//    sinceBuild sinceBuild
+    }
+
+//    publishPlugin {
+//        token("ssdfhasdfASDaq23jhnasdkjh")
+//        channels("nightly")
+//    }
+}