Replace HostPlatform with Gradle BuildPlatform service

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: AlexeyKuznetsov-DD

build.gradle.kts

@@ -1,6 +1,6 @@
 import com.diffplug.gradle.spotless.SpotlessExtension
-import datadog.gradle.plugin.HostPlatform
 import datadog.gradle.plugin.ci.testAggregate
+import datadog.gradle.plugin.isLinuxArm64
 
 plugins {
   kotlin("jvm") version libs.versions.kotlin.plugin apply false
@@ -90,8 +90,6 @@ allprojects {
     dependsOn(tasks.withType<AbstractCompile>())
   }
 
-  val isLinuxArm64 = HostPlatform.isLinuxArm64()
-
   tasks.configureEach {
     if (this is JavaForkOptions) {
       maxHeapSize = System.getProperty("datadog.forkedMaxHeapSize")
@@ -101,15 +99,15 @@ allprojects {
         "-XX:+HeapDumpOnOutOfMemoryError",
         "-XX:HeapDumpPath=/tmp"
       )
-      if (isLinuxArm64) {
+      if (isLinuxArm64()) {
         // Disable CDS to avoid SIGSEGVs on Linux arm64.
         jvmArgs("-Xshare:off")
       }
     }
   }
 
   // Disable CDS to avoid SIGSEGVs on Linux arm64.
-  if (isLinuxArm64) {
+  if (isLinuxArm64()) {
     tasks.withType<JavaCompile>().configureEach {
       options.forkOptions.jvmArgs?.add("-Xshare:off")
     }

buildSrc/src/main/kotlin/datadog/gradle/plugin/BuildPlatformExtensions.kt

@@ -0,0 +1,27 @@
+package datadog.gradle.plugin
+
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.support.serviceOf
+import org.gradle.platform.Architecture
+import org.gradle.platform.BuildPlatform
+import org.gradle.platform.OperatingSystem
+import org.gradle.platform.internal.CurrentBuildPlatform
+
+/**
+ * Helpers built on Gradle's [BuildPlatform].
+ *
+ * The public [BuildPlatform] interface is not directly available elsewhere.
+ * Build logic obtains it from the internal [CurrentBuildPlatform] service,
+ * resolved from a [Project] via `serviceOf` — see the [Project] overloads below.
+ */
+fun BuildPlatform.isLinuxArm64(): Boolean =
+  operatingSystem == OperatingSystem.LINUX && architecture == Architecture.AARCH64
+
+fun BuildPlatform.isMacArm64(): Boolean =
+  operatingSystem == OperatingSystem.MAC_OS && architecture == Architecture.AARCH64
+
+fun Project.isLinuxArm64(): Boolean =
+  serviceOf<CurrentBuildPlatform>().toBuildPlatform().isLinuxArm64()
+
+fun Project.isMacArm64(): Boolean =
+  serviceOf<CurrentBuildPlatform>().toBuildPlatform().isMacArm64()

buildSrc/src/main/kotlin/datadog/gradle/plugin/HostPlatform.kt

@@ -1,7 +1,7 @@
 package datadog.gradle.plugin.instrument
 
-import datadog.gradle.plugin.HostPlatform
 import datadog.gradle.plugin.instrument.BuildTimeInstrumentationPlugin.Companion.BUILD_TIME_INSTRUMENTATION_PLUGIN_CONFIGURATION
+import datadog.gradle.plugin.isLinuxArm64
 import org.gradle.api.Action
 import org.gradle.api.Project
 import org.gradle.api.Task
@@ -74,7 +74,7 @@ abstract class InstrumentPostProcessingAction @Inject constructor(
     return workerExecutor.processIsolation {
       forkOptions {
         setExecutable(javaLauncher.executablePath.asFile.absolutePath)
-        if (HostPlatform.isLinuxArm64()) {
+        if (project.isLinuxArm64()) {
           // Disable CDS to avoid SIGSEGVs on Linux arm64.
           jvmArgs("-Xshare:off")
         }

buildSrc/src/main/kotlin/datadog/gradle/plugin/instrument/InstrumentPostProcessingAction.kt

@@ -1,6 +1,6 @@
 package datadog.gradle.plugin.muzzle.tasks
 
-import datadog.gradle.plugin.HostPlatform
+import datadog.gradle.plugin.isLinuxArm64
 import datadog.gradle.plugin.muzzle.MuzzleAction
 import datadog.gradle.plugin.muzzle.MuzzleDirective
 import datadog.gradle.plugin.muzzle.MuzzleExtension
@@ -103,7 +103,7 @@ abstract class MuzzleTask @Inject constructor(
           if(javaLauncher.metadata.languageVersion > JavaLanguageVersion.of(9)) {
             jvmArgs("--add-opens=java.base/java.lang=ALL-UNNAMED")
           }
-          if (HostPlatform.isLinuxArm64()) {
+          if (project.isLinuxArm64()) {
             // Disable CDS to avoid SIGSEGVs on Linux arm64.
             jvmArgs("-Xshare:off")
           }

buildSrc/src/main/kotlin/datadog/gradle/plugin/muzzle/tasks/MuzzleTask.kt

@@ -1,6 +1,6 @@
 package datadog.gradle.plugin.testJvmConstraints
 
-import datadog.gradle.plugin.HostPlatform
+import datadog.gradle.plugin.isLinuxArm64
 import datadog.gradle.plugin.testJvmConstraints.TestJvmConstraintsExtension.Companion.TEST_JVM_CONSTRAINTS
 import org.gradle.api.JavaVersion
 import org.gradle.api.Plugin
@@ -90,7 +90,7 @@ class TestJvmConstraintsPlugin : Plugin<Project> {
 
     // Fix for Linux arm64 ByteBuddy error:
     // "Could not self-attach to current VM using external process"
-    if (HostPlatform.isLinuxArm64()) {
+    if (project.isLinuxArm64()) {
       conditionalJvmArgs(
         JavaVersion.VERSION_1_9,
         listOf("-Djdk.attach.allowAttachSelf=true")

buildSrc/src/main/kotlin/datadog/gradle/plugin/testJvmConstraints/TestJvmConstraintsPlugin.kt

@@ -1,4 +1,5 @@
-import datadog.gradle.plugin.HostPlatform
+import static datadog.gradle.plugin.BuildPlatformExtensionsKt.isLinuxArm64
+import static datadog.gradle.plugin.BuildPlatformExtensionsKt.isMacArm64
 
 plugins {
   id 'com.google.protobuf' version '0.10.0'
@@ -20,7 +21,7 @@ muzzle {
 protobuf {
   protoc {
     // There is no macOS arm64 support for protoc 3.0.0, so require Rosetta.
-    if (HostPlatform.isMacArm64()) {
+    if (isMacArm64(project)) {
       artifact = "com.google.protobuf:protoc:3.0.0:osx-x86_64"
     } else {
       artifact = "com.google.protobuf:protoc:3.0.0"
@@ -29,7 +30,7 @@ protobuf {
 }
 
 // TODO: protobuf supports Linux arm64 since `3.12.0`, but it is not source-compatible with 3.0.0
-if (HostPlatform.isLinuxArm64()) {
+if (isLinuxArm64(project)) {
   tasks.matching {
     it.name in [
       "extractTestProto",

dd-java-agent/instrumentation/protobuf-3.0/build.gradle

@@ -1,9 +1,9 @@
-import datadog.gradle.plugin.HostPlatform
+import static datadog.gradle.plugin.BuildPlatformExtensionsKt.isLinuxArm64
 
 // Fix for JVM crashes (SIGSEGV / SIGABRT, exit 134) when the
 // org.gradle.playframework `compilePlayRoutes` Worker Daemon starts up on Linux arm64.
 // No-op on every other host/arch combination.
-if (HostPlatform.isLinuxArm64()) {
+if (isLinuxArm64(project)) {
   tasks.named("compilePlayRoutes").configure { task ->
     // Find the class in the hierarchy that declares the private `workerExecutor` field.
     def workerExecutorField = null