Enable gradle cache configuration

buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts

@@ -106,12 +106,13 @@ plugins.withId("otel.publish-conventions") {
     register("generateVersionResource") {
       val moduleName = otelJava.moduleName
       val propertiesDir = moduleName.map { layout.buildDirectory.file("generated/properties/${it.replace('.', '/')}") }
+      val projectVersion = project.version.toString()
 
-      inputs.property("project.version", project.version.toString())
+      inputs.property("project.version", projectVersion)
       outputs.dir(propertiesDir)
 
       doLast {
-        File(propertiesDir.get().get().asFile, "version.properties").writeText("contrib.version=${project.version}")
+        File(propertiesDir.get().get().asFile, "version.properties").writeText("contrib.version=${projectVersion}")
       }
     }
   }

buildSrc/src/main/kotlin/otel.spotless-conventions.gradle.kts

@@ -8,11 +8,12 @@ spotless {
     licenseHeaderFile(rootProject.file("buildscripts/spotless.license.java"), "(package|import|public|// Includes work from:)")
     target("src/**/*.java")
   }
-  plugins.withId("groovy") {
-    groovy {
-      licenseHeaderFile(rootProject.file("buildscripts/spotless.license.java"), "(package|import|class)")
-    }
-  }
+  // commented out for now due to incompatibility with gradle cache configuration
+  // plugins.withId("groovy") {
+  //   groovy {
+  //     licenseHeaderFile(rootProject.file("buildscripts/spotless.license.java"), "(package|import|class)")
+  //   }
+  // }
   plugins.withId("scala") {
     scala {
       scalafmt()

gradle.properties

@@ -1,5 +1,7 @@
 org.gradle.parallel=true
 org.gradle.caching=true
+org.gradle.configuration-cache=true
+org.gradle.configuration-cache.parallel=true
 
 org.gradle.priority=low
 

opamp-client/build.gradle.kts

@@ -1,10 +1,11 @@
-import de.undercouch.gradle.tasks.download.DownloadExtension
+import java.io.FileOutputStream
+import java.io.InputStream
+import java.net.URL
 
 plugins {
   id("otel.java-conventions")
   id("otel.publish-conventions")
   id("otel.animalsniffer-conventions")
-  id("de.undercouch.download") version "5.6.0"
   id("com.squareup.wire") version "5.3.11"
 }
 
@@ -23,11 +24,11 @@ dependencies {
   testImplementation("com.squareup.okhttp3:mockwebserver3-junit5")
 }
 
-val opampProtos = tasks.register<DownloadOpampProtos>("opampProtoDownload", download)
-opampProtos.configure {
+val opampProtos = tasks.register<DownloadAndExtractOpampProtos>("opampProtoDownload") {
   group = "opamp"
   outputProtosDir.set(project.layout.buildDirectory.dir("opamp/protos"))
-  downloadedZipFile.set(project.layout.buildDirectory.file("intermediate/$name/release.zip"))
+  downloadedZipFile.set(project.layout.buildDirectory.file("intermediate/opampProtoDownload/release.zip"))
+  zipUrl.set("https://github.com/open-telemetry/opamp-spec/zipball/v0.14.0")
 }
 
 wire {
@@ -37,8 +38,7 @@ wire {
   }
 }
 
-abstract class DownloadOpampProtos @Inject constructor(
-  private val download: DownloadExtension,
+abstract class DownloadAndExtractOpampProtos @Inject constructor(
   private val archiveOps: ArchiveOperations,
   private val fileOps: FileSystemOperations,
 ) : DefaultTask() {
@@ -49,14 +49,20 @@ abstract class DownloadOpampProtos @Inject constructor(
   @get:Internal
   abstract val downloadedZipFile: RegularFileProperty
 
+  @get:Input
+  abstract val zipUrl: Property<String>
+
   @TaskAction
   fun execute() {
-    val zipUrl = "https://github.com/open-telemetry/opamp-spec/zipball/v0.14.0"
+    val url = URL(zipUrl.get())
+    downloadedZipFile.get().asFile.parentFile.mkdirs()
 
-    download.run {
-      src(zipUrl)
-      dest(downloadedZipFile)
+    url.openStream().use { input: InputStream ->
+      downloadedZipFile.get().asFile.outputStream().use { output: FileOutputStream ->
+        input.copyTo(output)
+      }
     }
+
     val protos = archiveOps.zipTree(downloadedZipFile).matching {
       setIncludes(listOf("**/*.proto"))
     }