build(format): disable Groovy-Eclipse formatter to fix CI serialization failure

Spotless' greclipse() step hits a known Spotless/Gradle bug when its internal

state is fingerprinted for the build cache on fresh CI caches:

  If the initializer was null, then one of roundtripStateInternal or

  equalityStateInternal should be non-null, and neither was

Replacing greclipse() with basic whitespace steps (leadingTabsToSpaces,

trimTrailingWhitespace, endWithNewline) avoids the problematic Eclipse P2

serialization path while still keeping .gradle files tidy.

Also adds the missing trailing newline to gradle/semantic-version.gradle.

See: diffplug/spotless#2402

Author: jbachorik

build-logic/conventions/build.gradle.kts

@@ -13,12 +13,7 @@ repositories {
 
 dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib")
-    // Pinned to 8.5.1 because 8.6.0+ triggers a Spotless/Gradle serialization bug with
-    // the Groovy-Eclipse formatter on fresh Gradle user homes / CI caches:
-    //   "If the initializer was null, then one of roundtripStateInternal or
-    //    equalityStateInternal should be non-null, and neither was"
-    // See https://github.com/diffplug/spotless/issues/2402 and related issues.
-    implementation("com.diffplug.spotless:spotless-plugin-gradle:8.5.1")
+    implementation("com.diffplug.spotless:spotless-plugin-gradle:8.7.0")
 }
 
 gradlePlugin {

build-logic/conventions/src/main/kotlin/com/datadoghq/profiler/SpotlessConventionPlugin.kt

@@ -27,10 +27,15 @@ class SpotlessConventionPlugin : Plugin<Project> {
     }
 
     // Groovy Gradle files
+    // NOTE: greclipse() is disabled because it triggers a Spotless/Gradle serialization
+    // bug on fresh CI caches (see diffplug/spotless#2402). Basic whitespace formatting
+    // is still applied.
     spotless.groovyGradle {
       toggleOffOn()
       target("*.gradle", "gradle/**/*.gradle")
-      greclipse().configFile("$configPath/enforcement/spotless-groovy.properties")
+      leadingTabsToSpaces()
+      trimTrailingWhitespace()
+      endWithNewline()
     }
 
     // Kotlin Gradle files
@@ -54,7 +59,10 @@ class SpotlessConventionPlugin : Plugin<Project> {
         if (!skipJavaExclude) {
           excludeJava()
         }
-        greclipse().configFile("$configPath/enforcement/spotless-groovy.properties")
+        // greclipse() disabled: see the groovyGradle block above.
+        leadingTabsToSpaces()
+        trimTrailingWhitespace()
+        endWithNewline()
       }
     }
 

gradle/semantic-version.gradle

@@ -1 +1 @@
-version = "0.58.0"
+version = "0.58.0"