Support com.gradleup.shadow plugin

README.adoc

@@ -195,9 +195,8 @@ It is possible a dependency on the `test` source set by setting property `includ
 
 == Using JMH Gradle Plugin with Shadow Plugin
 
-Optionally it is possible to use the https://github.com/johnrengelman/shadow/[Shadow Plugin] (or the
-https://github.com/Goooler/shadow[forked Shadow Plugin]) to do actual JMH jar creation. The configuration of
-Shadow Plugin for JMH jar is done via `jmhJar` block.
+Optionally it is possible to use the https://github.com/GradleUp/shadow[Shadow Plugin] to do actual JMH jar creation.
+The configuration of Shadow Plugin for JMH jar is done via `jmhJar` block.
 
 For example:
 [source,groovy]

build.gradle.kts

@@ -38,7 +38,7 @@ dependencies {
         exclude(mapOf("group" to "org.codehaus.groovy"))
     }
     pluginsUnderTest("gradle.plugin.com.github.johnrengelman:shadow:7.1.2")
-    pluginsUnderTest("io.github.goooler.shadow:shadow-gradle-plugin:8.1.8")
+    pluginsUnderTest("com.gradleup.shadow:shadow-gradle-plugin:8.3.0")
 
     testImplementation("org.openjdk.jmh:jmh-core:$jmhVersion")
     testImplementation("org.openjdk.jmh:jmh-generator-bytecode:$jmhVersion")

src/funcTest/groovy/me/champeau/jmh/AbstractFuncSpec.groovy

@@ -30,15 +30,18 @@ abstract class AbstractFuncSpec extends Specification {
             GradleVersion.current()
     ]
 
-    protected static final List<String> TESTED_SHADOW_PLUGINS = [
-            'com.github.johnrengelman.shadow',
-            'io.github.goooler.shadow'
+    /** Plugin + min Gradle version the plugin supports. */
+    protected static final Map<String, GradleVersion> TESTED_SHADOW_PLUGINS = [
+            'com.gradleup.shadow':              GradleVersion.version('8.3'),
+            'com.github.johnrengelman.shadow':  GradleVersion.version('7.0')
     ]
 
-    protected static final Map<String, String> TESTED_SHADOW_PLUGIN_FOLDERS = [
-            'com.github.johnrengelman.shadow':  'shadow',
-            'io.github.goooler.shadow':         'forked-shadow'
-    ]
+    /** List of plugin + Gradle version combinations. */
+    protected static final List<Tuple2<String, GradleVersion>> TESTED_SHADOW_GRADLE_COMBINATIONS =
+            TESTED_SHADOW_PLUGINS.collect { plugin, minGradle ->
+                TESTED_GRADLE_VERSIONS.findAll { gradle -> gradle >= minGradle }
+                        .collect { gradle -> Tuple.tuple(plugin, gradle) }
+            }.collectMany { it }
 
     @TempDir
     File temporaryFolder
@@ -51,12 +54,20 @@ abstract class AbstractFuncSpec extends Specification {
         testedGradleVersion = gradleVersion
     }
 
-    // TODO: We can remove this and fully enable CC in tests once bump the Shadow version to 8.1.1+.
     // TODO: But Kotlin test still fails, it was suppressed in 1bab41646df6f47aea84ea3febeeec1c76cd2e79, need to investigate.
     protected void withoutConfigurationCache(String reason) {
         noConfigurationCacheReason = reason
     }
 
+    /**
+     * TODO: remove this once we bumped min Shadow support to 8.1.1 or dropped it.
+     */
+    protected void disableConfigCacheForShadow(String pluginId) {
+        if (pluginId == 'com.github.johnrengelman.shadow') {
+            noConfigurationCacheReason = 'com.github.johnrengelman.shadow supports CC from 8.1.1+'
+        }
+    }
+
     File getProjectDir() {
         temporaryFolder
     }
@@ -73,9 +84,10 @@ abstract class AbstractFuncSpec extends Specification {
         file("build/reports/benchmarks.csv")
     }
 
-    protected void usingSample(String name) {
+    protected File usingSample(String name) {
         File sampleDir = new File("src/funcTest/resources/$name")
         FileUtils.copyDirectory(sampleDir, projectDir)
+        return projectDir
     }
 
     protected File file(String path) {

src/funcTest/groovy/me/champeau/jmh/JmhWithShadowPluginSpec.groovy

@@ -25,9 +25,13 @@ class JmhWithShadowPluginSpec extends AbstractFuncSpec {
     def "Run #language benchmarks that are packaged with Shadow plugin (#gradleVersion #language #shadowPlugin)"() {
 
         given:
-        usingSample("${language.toLowerCase()}-${TESTED_SHADOW_PLUGIN_FOLDERS[shadowPlugin]}-project")
+        def projectRoot = usingSample("${language.toLowerCase()}-shadow-project")
+        def rootBuildFile = new File(projectRoot, 'build.gradle')
+        def buildFileContent = rootBuildFile.text.replace("shadowPlugin", shadowPlugin)
+        rootBuildFile.text = buildFileContent
+
         usingGradleVersion(gradleVersion)
-        withoutConfigurationCache('shadow plugin unsupported')
+        disableConfigCacheForShadow(shadowPlugin)
 
         when:
         def result = build("jmh")
@@ -39,8 +43,10 @@ class JmhWithShadowPluginSpec extends AbstractFuncSpec {
         where:
         [language, gradleVersion, shadowPlugin] << [
                 ['Java', 'Scala'],
-                TESTED_GRADLE_VERSIONS,
-                TESTED_SHADOW_PLUGINS
-        ].combinations()
+                TESTED_SHADOW_GRADLE_COMBINATIONS,
+        ].combinations { lang, tuple ->
+            def (plugin, gradle) = tuple
+            [lang, gradle, plugin]
+        }
     }
 }

src/funcTest/groovy/me/champeau/jmh/ProjectWithDuplicateClassesSpec.groovy

@@ -63,7 +63,7 @@ class ProjectWithDuplicateClassesSpec extends AbstractFuncSpec {
 
         given:
         usingGradleVersion(gradleVersion)
-        withoutConfigurationCache('shadow plugin unsupported')
+        disableConfigCacheForShadow(shadowPlugin)
 
         and:
         buildFile << """
@@ -89,10 +89,7 @@ class ProjectWithDuplicateClassesSpec extends AbstractFuncSpec {
         result.task(":jmhJar").outcome == FAILED
 
         where:
-        [shadowPlugin, gradleVersion] << [
-                TESTED_SHADOW_PLUGINS,
-                TESTED_GRADLE_VERSIONS
-        ].combinations()
+        [shadowPlugin, gradleVersion] << TESTED_SHADOW_GRADLE_COMBINATIONS
     }
 
     def "Show warning for duplicate classes when DuplicatesStrategy.WARN is used (#gradleVersion)"() {
@@ -131,7 +128,7 @@ class ProjectWithDuplicateClassesSpec extends AbstractFuncSpec {
 
         given:
         usingGradleVersion(gradleVersion)
-        withoutConfigurationCache('shadow plugin unsupported')
+        disableConfigCacheForShadow(shadowPlugin)
 
         and:
         buildFile << """
@@ -158,10 +155,7 @@ class ProjectWithDuplicateClassesSpec extends AbstractFuncSpec {
         assertDuplicateClassesWarning(gradleVersion, result.output)
 
         where:
-        [shadowPlugin, gradleVersion] << [
-                TESTED_SHADOW_PLUGINS,
-                TESTED_GRADLE_VERSIONS
-        ].combinations()
+        [shadowPlugin, gradleVersion] << TESTED_SHADOW_GRADLE_COMBINATIONS
     }
 
     private static boolean assertDuplicateClassesWarning(GradleVersion gradleVersion, String output) {

src/funcTest/groovy/me/champeau/jmh/ProjectWithDuplicateDependenciesSpec.groovy

@@ -54,7 +54,7 @@ class ProjectWithDuplicateDependenciesSpec extends AbstractFuncSpec {
 
         given:
         usingGradleVersion(gradleVersion)
-        withoutConfigurationCache('shadow plugin unsupported')
+        disableConfigCacheForShadow(shadowPlugin)
 
         and:
         createBuildFile("""
@@ -73,10 +73,7 @@ class ProjectWithDuplicateDependenciesSpec extends AbstractFuncSpec {
         benchmarksCsv.text.contains('JavaBenchmark.sqrtBenchmark')
 
         where:
-        [shadowPlugin, gradleVersion] << [
-                TESTED_SHADOW_PLUGINS,
-                TESTED_GRADLE_VERSIONS
-        ].combinations()
+        [shadowPlugin, gradleVersion] << TESTED_SHADOW_GRADLE_COMBINATIONS
     }
 
     void createBuildFile(String plugins) {

src/funcTest/resources/java-project-with-feature-previews/build.gradle

@@ -25,16 +25,18 @@ repositories {
 // Configure Java compilation tasks to enable feature previews
 tasks.withType(JavaCompile).configureEach {
     options.compilerArgs.add("--enable-preview")
+    options.release = 22
     javaCompiler.set(javaToolchains.compilerFor {
-        // Using 15 so that we can try a feature preview
-        languageVersion.set(JavaLanguageVersion.of(15))
+        // Using 22 so that we can try a feature preview, because
+        // --enable-preview does not work with 21.
+        languageVersion.set(JavaLanguageVersion.of(22))
     })
 }
 
-// Then configure the JMH Tasks to build with Java 15
+// Then configure the JMH Tasks to build with Java 22
 tasks.withType(me.champeau.jmh.WithJavaToolchain).configureEach {
     javaLauncher.set(javaToolchains.launcherFor {
-        languageVersion.set(JavaLanguageVersion.of(15))
+        languageVersion.set(JavaLanguageVersion.of(22))
     })
 }
 

src/funcTest/resources/java-shadow-project/build.gradle

@@ -15,7 +15,7 @@
  */
 plugins {
     id 'java'
-	id 'com.github.johnrengelman.shadow'
+    id 'shadowPlugin'
     id 'me.champeau.jmh'
 }
 
@@ -26,4 +26,4 @@ repositories {
 jmh {
     resultFormat = 'csv'
     resultsFile = file('build/reports/benchmarks.csv')
-}
+}

src/funcTest/resources/scala-shadow-project/build.gradle

@@ -15,7 +15,7 @@
  */
 plugins {
     id 'scala'
-    id 'com.github.johnrengelman.shadow'
+    id 'shadowPlugin'
     id 'me.champeau.jmh'
 }