Fix gradle4.8 deprecation warnings (#31654)

* remove explicit wrapper task

It's created by Gradle and triggers a deprecation warning
Simplify configuration

* Upgrade shadow plugin to get rid of Gradle deprecation

* Move compile configuration to base plugin

Solves Gradle deprecation warning from earlier Gradle versions

* Enable stable publishing in the Gradle build

* Replace usage of deprecated property

* bump Gradle version in build compare

build.gradle

@@ -480,25 +480,17 @@ task run(type: Run) {
   impliesSubProjects = true
 }
 
-task wrapper(type: Wrapper)
-
-gradle.projectsEvaluated {
-
-  allprojects {
-    tasks.withType(Wrapper) { Wrapper wrapper ->
-      wrapper.distributionType = DistributionType.ALL
-
-      wrapper.doLast {
+wrapper {
+    distributionType = DistributionType.ALL
+    doLast {
         final DistributionLocator locator = new DistributionLocator()
         final GradleVersion version = GradleVersion.version(wrapper.gradleVersion)
         final URI distributionUri = locator.getDistributionFor(version, wrapper.distributionType.name().toLowerCase(Locale.ENGLISH))
         final URI sha256Uri = new URI(distributionUri.toString() + ".sha256")
         final String sha256Sum = new String(sha256Uri.toURL().bytes)
         wrapper.getPropertiesFile() << "distributionSha256Sum=${sha256Sum}\n"
-      }
+        println "Added checksum to wrapper properties"
     }
-  }
-
 }
 
 static void assertLinesInFile(final Path path, final List<String> expectedLines) {
@@ -585,7 +577,7 @@ if (System.properties.get("build.compare") != null) {
       }
     }
     sourceBuild {
-      gradleVersion = "4.7" // does not default to gradle weapper of project dir, but current version
+      gradleVersion = "4.8.1" // does not default to gradle weapper of project dir, but current version
       projectDir = referenceProject
       tasks = ["clean", "assemble"]
       arguments = ["-Dbuild.compare_friendly=true"]

buildSrc/src/main/groovy/org/elasticsearch/gradle/BuildPlugin.groovy

@@ -471,6 +471,24 @@ class BuildPlugin implements Plugin<Project> {
 
     /**Configuration generation of maven poms. */
     public static void configurePomGeneration(Project project) {
+        // Only works with  `enableFeaturePreview('STABLE_PUBLISHING')`
+        // https://github.com/gradle/gradle/issues/5696#issuecomment-396965185
+        project.tasks.withType(GenerateMavenPom.class) { GenerateMavenPom generatePOMTask ->
+            // The GenerateMavenPom task is aggressive about setting the destination, instead of fighting it,
+            // just make a copy.
+            doLast {
+                project.copy {
+                    from generatePOMTask.destination
+                    into "${project.buildDir}/distributions"
+                    rename { "${project.archivesBaseName}-${project.version}.pom" }
+                }
+            }
+            // build poms with assemble (if the assemble task exists)
+            Task assemble = project.tasks.findByName('assemble')
+            if (assemble) {
+                assemble.dependsOn(generatePOMTask)
+            }
+        }
         project.plugins.withType(MavenPublishPlugin.class).whenPluginAdded {
             project.publishing {
                 publications {
@@ -480,20 +498,6 @@ class BuildPlugin implements Plugin<Project> {
                     }
                 }
             }
-
-            // Work around Gradle 4.8 issue until we `enableFeaturePreview('STABLE_PUBLISHING')`
-            // https://github.com/gradle/gradle/issues/5696#issuecomment-396965185
-            project.getGradle().getTaskGraph().whenReady {
-                project.tasks.withType(GenerateMavenPom.class) { GenerateMavenPom t ->
-                    // place the pom next to the jar it is for
-                    t.destination = new File(project.buildDir, "distributions/${project.archivesBaseName}-${project.version}.pom")
-                    // build poms with assemble (if the assemble task exists)
-                    Task assemble = project.tasks.findByName('assemble')
-                    if (assemble) {
-                        assemble.dependsOn(t)
-                    }
-                }
-            }
         }
     }
 

buildSrc/src/main/groovy/org/elasticsearch/gradle/plugin/PluginBuildPlugin.groovy

@@ -157,16 +157,18 @@ public class PluginBuildPlugin extends BuildPlugin {
     /** Adds a task to move jar and associated files to a "-client" name. */
     protected static void addClientJarTask(Project project) {
         Task clientJar = project.tasks.create('clientJar')
-        clientJar.dependsOn(project.jar, 'generatePomFileForClientJarPublication', project.javadocJar, project.sourcesJar)
+        clientJar.dependsOn(project.jar, project.tasks.generatePomFileForClientJarPublication, project.javadocJar, project.sourcesJar)
         clientJar.doFirst {
             Path jarFile = project.jar.outputs.files.singleFile.toPath()
             String clientFileName = jarFile.fileName.toString().replace(project.version, "client-${project.version}")
             Files.copy(jarFile, jarFile.resolveSibling(clientFileName), StandardCopyOption.REPLACE_EXISTING)
 
-            String pomFileName = jarFile.fileName.toString().replace('.jar', '.pom')
             String clientPomFileName = clientFileName.replace('.jar', '.pom')
-            Files.copy(jarFile.resolveSibling(pomFileName), jarFile.resolveSibling(clientPomFileName),
-                    StandardCopyOption.REPLACE_EXISTING)
+            Files.copy(
+                    project.tasks.generatePomFileForClientJarPublication.outputs.files.singleFile.toPath(),
+                    jarFile.resolveSibling(clientPomFileName),
+                    StandardCopyOption.REPLACE_EXISTING
+            )
 
             String sourcesFileName = jarFile.fileName.toString().replace('.jar', '-sources.jar')
             String clientSourcesFileName = clientFileName.replace('.jar', '-sources.jar')

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/StandaloneRestTestPlugin.groovy

@@ -29,6 +29,7 @@ import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.Task
 import org.gradle.api.plugins.JavaBasePlugin
+import org.gradle.api.tasks.compile.JavaCompile
 
 /**
  * Configures the build to compile tests against Elasticsearch's test framework
@@ -61,5 +62,12 @@ public class StandaloneRestTestPlugin implements Plugin<Project> {
 
         PrecommitTasks.create(project, false)
         project.check.dependsOn(project.precommit)
+
+        project.tasks.withType(JavaCompile) {
+            // This will be the default in Gradle 5.0
+            if (options.compilerArgs.contains("-processor") == false) {
+                options.compilerArgs << '-proc:none'
+            }
+        }
     }
 }

client/benchmark/build.gradle

@@ -24,7 +24,7 @@ buildscript {
     }
   }
   dependencies {
-    classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.2'
+    classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
   }
 }
 

settings.gradle

@@ -123,3 +123,6 @@ if (extraProjects.exists()) {
     addSubProjects('', extraProjectDir)
   }
 }
+
+// enable in preparation for Gradle 5.0
+enableFeaturePreview('STABLE_PUBLISHING')

x-pack/plugin/build.gradle

@@ -36,7 +36,7 @@ subprojects {
         // default to main class files if such a source set exists
         final List files = []
         if (project.sourceSets.findByName("main")) {
-          files.add(project.sourceSets.main.output.classesDir)
+          files.add(project.sourceSets.main.output.classesDirs)
           dependsOn project.tasks.classes
         }
         // filter out non-existent classes directories from empty source sets

x-pack/plugin/sql/jdbc/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.2'
+        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
     }
 }