fix: fingerprint test JVM architecture

Author: bric3

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

@@ -36,6 +36,7 @@ class TestJvmConstraintsPlugin : Plugin<Project> {
             "vendor" to vendor,
             "runtimeVersion" to javaRuntimeVersion,
             "vmVersion" to jvmVersion,
+            "architecture" to System.getProperty("os.arch"),
           )
         }
       })

buildSrc/src/test/kotlin/datadog/gradle/plugin/testJvmConstraints/TestJvmCacheInputsTest.kt

@@ -10,7 +10,7 @@ import org.junit.jupiter.params.provider.ValueSource
 
 class TestJvmCacheInputsTest : GradleFixture() {
   @ParameterizedTest
-  @ValueSource(strings = ["vendor", "runtimeVersion", "vmVersion"])
+  @ValueSource(strings = ["vendor", "runtimeVersion", "vmVersion", "os.arch"])
   fun `test cache follows the selected launcher identity`(changedField: String) {
     writeSettings(
       """
@@ -51,6 +51,11 @@ class TestJvmCacheInputsTest : GradleFixture() {
 
       val launcher = javaToolchains.launcherFor {}
       val changedField = providers.gradleProperty("changedJvmField").orElse("")
+      if (changedField.get() == "os.arch") {
+        val original = System.getProperty("os.arch")
+        System.setProperty("os.arch", "different-architecture")
+        gradle.buildFinished { System.setProperty("os.arch", original) }
+      }
       tasks.test {
         useJUnitPlatform()
         javaLauncher.set(launcher.map { SelectedLauncher(it, changedField.get()) })

buildSrc/src/test/kotlin/datadog/gradle/plugin/testJvmConstraints/TestJvmConstraintsPluginTest.kt

@@ -46,6 +46,7 @@ class TestJvmConstraintsPluginTest {
       "vendor" to metadata.vendor,
       "runtimeVersion" to metadata.javaRuntimeVersion,
       "vmVersion" to metadata.jvmVersion,
+      "architecture" to System.getProperty("os.arch"),
     ))
   }
 

docs/how_to_work_with_gradle.md

@@ -951,7 +951,7 @@ This project provides several custom Gradle extensions to manage multi-JVM testi
 
 Controls which JVM versions are allowed to run tests. Applied via the `dd-trace-java.test-jvm-constraints` plugin.
 
-Each `Test` task also tracks its selected JVM's vendor, full runtime version and VM version as inputs.
+Each `Test` task also tracks its selected JVM's vendor, full runtime version, VM version, and architecture as inputs.
 Changing these values invalidates up-to-date checks and build-cache entries, even when the Java major version stays the same.
 
 ```Gradle Kotlin DSL