Prepare for Gradle 9

build.gradle.kts

@@ -44,8 +44,18 @@ afterEvaluate {
         javadoc {
             title = "Smithy API ${version}"
             setDestinationDir(layout.buildDirectory.dir("docs/javadoc/latest").get().asFile)
-            source(subprojects.map { project(it.path).sourceSets.main.get().allJava })
-            classpath = files(subprojects.map { project(it.path).sourceSets.main.get().compileClasspath })
+
+            // Add an explicit dependencies on the compilation of each subproject because we need
+            // the compile classpath, which we can only get after the compile task has completed.
+            dependsOn(subprojects.map { it.tasks.named("compileJava") })
+            classpath = files(provider {
+                subprojects.flatMap { subproject ->
+                    subproject.configurations.getByName("compileClasspath").resolve()
+                }
+            })
+
+            source(provider { subprojects.map { project -> project.sourceSets.main.get().allJava } })
+
             (options as StandardJavadocDocletOptions).apply {
                 addStringOption("Xdoclint:-html", "-quiet")
             }

config/spotbugs/filter.xml

@@ -194,6 +194,15 @@
         <Bug pattern="DE_MIGHT_IGNORE"/>
     </Match>
 
+    <!-- We could mark these as volatile, but in practice we don't share instances across
+         threads, so there isn't a need to. This class is private, so we don't have to worry
+         about outside
+          usage. -->
+    <Match>
+        <Class name="software.amazon.smithy.cli.commands.ModelBuilder"/>
+        <Bug pattern="AT_STALE_THREAD_WRITE_OF_PRIMITIVE"/>
+    </Match>
+
     <!-- This checks for mutability, but it's full of false positives. Among other things, it doesn't
          recognize SetUtils.copyOf and similar as providing immutable collections. -->
     <Match>

gradle/libs.versions.toml

@@ -1,13 +1,14 @@
 [versions]
 junit5 = "5.13.4"
 hamcrest = "3.0"
-jmh = "0.6.6"
-spotbugs = "6.0.22"
+jmh = "0.7.2"
+spotbugs = "6.2.4"
 spotless = "7.2.1"
 smithy-gradle = "1.3.0"
 assertj = "3.27.4"
 prettier4j = "0.3.0"
 maven-resolver-provider = "3.9.11"
+# TODO: upgrade major version
 maven-resolver = "1.9.24"
 slf4j = "1.7.36"
 mockserver = "5.15.0"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME