Convert testclusters to use distro download plugin (elastic#44253)

Test clusters currently has its own set of logic for dealing with
finding different versions of Elasticsearch, downloading them, and
extracting them. This commit converts testclusters to use the
DistributionDownloadPlugin.

buildSrc/src/main/groovy/org/elasticsearch/gradle/doc/DocsTestPlugin.groovy

@@ -21,11 +21,9 @@ package org.elasticsearch.gradle.doc
 import org.elasticsearch.gradle.OS
 import org.elasticsearch.gradle.Version
 import org.elasticsearch.gradle.VersionProperties
-import org.elasticsearch.gradle.test.ClusterFormationTasks
 import org.elasticsearch.gradle.test.RestTestPlugin
 import org.gradle.api.Project
 import org.gradle.api.Task
-
 /**
  * Sets up tests for documentation.
  */
@@ -38,7 +36,7 @@ public class DocsTestPlugin extends RestTestPlugin {
         super.apply(project)
         String distribution = System.getProperty('tests.distribution', 'default')
         // The distribution can be configured with -Dtests.distribution on the command line
-        project.testClusters.integTest.distribution = distribution.toUpperCase()
+        project.testClusters.integTest.testDistribution = distribution.toUpperCase()
         project.testClusters.integTest.nameCustomization = { it.replace("integTest", "node") }
         // Docs are published separately so no need to assemble
         project.tasks.assemble.enabled = false

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

@@ -18,15 +18,14 @@
  */
 package org.elasticsearch.gradle.test
 
-import org.elasticsearch.gradle.VersionProperties
+
 import org.elasticsearch.gradle.testclusters.ElasticsearchCluster
 import org.elasticsearch.gradle.testclusters.TestClustersPlugin
 import org.gradle.api.DefaultTask
 import org.gradle.api.Task
 import org.gradle.api.execution.TaskExecutionAdapter
 import org.gradle.api.logging.Logger
 import org.gradle.api.logging.Logging
-import org.gradle.api.specs.Specs
 import org.gradle.api.tasks.Copy
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.TaskState
@@ -37,7 +36,6 @@ import org.gradle.plugins.ide.idea.IdeaPlugin
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
 import java.util.stream.Stream
-
 /**
  * A wrapper task around setting up a cluster and running rest tests.
  */
@@ -69,8 +67,6 @@ class RestIntegTestTask extends DefaultTask {
         } else {
             project.testClusters {
                 "$name" {
-                    distribution = 'INTEG_TEST'
-                    version = VersionProperties.elasticsearch
                     javaHome = project.file(project.ext.runtimeJavaHome)
                 }
             }

buildSrc/src/main/java/org/elasticsearch/gradle/DistributionDownloadPlugin.java

@@ -54,6 +54,7 @@
  */
 public class DistributionDownloadPlugin implements Plugin<Project> {
 
+    private static final String CONTAINER_NAME = "elasticsearch_distributions";
     private static final String FAKE_IVY_GROUP = "elasticsearch-distribution";
     private static final String DOWNLOAD_REPO_NAME = "elasticsearch-downloads";
 
@@ -67,7 +68,7 @@ public void apply(Project project) {
             Configuration extractedConfiguration = project.getConfigurations().create("es_distro_extracted_" + name);
             return new ElasticsearchDistribution(name, project.getObjects(), fileConfiguration, extractedConfiguration);
         });
-        project.getExtensions().add("elasticsearch_distributions", distributionsContainer);
+        project.getExtensions().add(CONTAINER_NAME, distributionsContainer);
 
         setupDownloadServiceRepo(project);
 
@@ -78,6 +79,11 @@ public void apply(Project project) {
         project.afterEvaluate(this::setupDistributions);
     }
 
+    @SuppressWarnings("unchecked")
+    public static NamedDomainObjectContainer<ElasticsearchDistribution> getContainer(Project project) {
+        return (NamedDomainObjectContainer<ElasticsearchDistribution>) project.getExtensions().getByName(CONTAINER_NAME);
+    }
+
     // pkg private for tests
     void setupDistributions(Project project) {
         for (ElasticsearchDistribution distribution : distributionsContainer) {

buildSrc/src/main/java/org/elasticsearch/gradle/ElasticsearchDistribution.java

@@ -20,14 +20,17 @@
 package org.elasticsearch.gradle;
 
 import org.gradle.api.Buildable;
+import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.FileTree;
 import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.TaskDependency;
 
 import java.io.File;
 import java.util.Iterator;
 import java.util.Locale;
+import java.util.concurrent.Callable;
 
 public class ElasticsearchDistribution implements Buildable {
 
@@ -90,6 +93,10 @@ public TaskDependency getBuildDependencies() {
             return configuration.getBuildDependencies();
         }
 
+        public FileTree getFileTree(Project project) {
+            return project.fileTree((Callable<File>) configuration::getSingleFile);
+        }
+
         @Override
         public String toString() {
             return configuration.getSingleFile().toString();

buildSrc/src/main/java/org/elasticsearch/gradle/test/RestTestRunnerTask.java

@@ -8,7 +8,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 
-import static org.elasticsearch.gradle.Distribution.INTEG_TEST;
+import static org.elasticsearch.gradle.testclusters.TestDistribution.INTEG_TEST;
 
 /**
  * Customized version of Gradle {@link Test} task which tracks a collection of {@link ElasticsearchCluster} as a task input. We must do this
@@ -23,7 +23,7 @@ public class RestTestRunnerTask extends Test {
     public RestTestRunnerTask() {
         super();
         this.getOutputs().doNotCacheIf("Build cache is only enabled for tests against clusters using the 'integ-test' distribution",
-            task -> clusters.stream().flatMap(c -> c.getNodes().stream()).anyMatch(n -> n.getDistribution() != INTEG_TEST));
+            task -> clusters.stream().flatMap(c -> c.getNodes().stream()).anyMatch(n -> n.getTestDistribution() != INTEG_TEST));
     }
 
     @Nested

buildSrc/src/main/java/org/elasticsearch/gradle/testclusters/ElasticsearchCluster.java

@@ -18,10 +18,9 @@
  */
 package org.elasticsearch.gradle.testclusters;
 
-import org.elasticsearch.gradle.Distribution;
+import org.elasticsearch.gradle.ElasticsearchDistribution;
 import org.elasticsearch.gradle.FileSupplier;
 import org.elasticsearch.gradle.PropertyNormalization;
-import org.elasticsearch.gradle.Version;
 import org.elasticsearch.gradle.http.WaitForHttpResource;
 import org.gradle.api.Named;
 import org.gradle.api.NamedDomainObjectContainer;
@@ -43,7 +42,6 @@
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.function.BiConsumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
@@ -60,22 +58,23 @@ public class ElasticsearchCluster implements TestClusterConfiguration, Named {
     private final String clusterName;
     private final NamedDomainObjectContainer<ElasticsearchNode> nodes;
     private final File workingDirBase;
-    private final File artifactsExtractDir;
+    private final Function<Integer, ElasticsearchDistribution> distributionFactory;
     private final LinkedHashMap<String, Predicate<TestClusterConfiguration>> waitConditions = new LinkedHashMap<>();
     private final Project project;
 
-    public ElasticsearchCluster(String path, String clusterName, Project project, File artifactsExtractDir, File workingDirBase) {
+    public ElasticsearchCluster(String path, String clusterName, Project project,
+                                Function<Integer, ElasticsearchDistribution> distributionFactory, File workingDirBase) {
         this.path = path;
         this.clusterName = clusterName;
         this.project = project;
+        this.distributionFactory = distributionFactory;
         this.workingDirBase = workingDirBase;
-        this.artifactsExtractDir = artifactsExtractDir;
         this.nodes = project.container(ElasticsearchNode.class);
         this.nodes.add(
             new ElasticsearchNode(
                 path, clusterName + "-0",
-                project, artifactsExtractDir, workingDirBase
-            )
+                project, workingDirBase, distributionFactory.apply(0)
+                )
         );
         // configure the cluster name eagerly so nodes know about it
         this.nodes.all((node) -> node.defaultConfig.put("cluster.name", safeName(clusterName)));
@@ -98,8 +97,8 @@ public void setNumberOfNodes(int numberOfNodes) {
 
         for (int i = nodes.size() ; i < numberOfNodes; i++) {
             this.nodes.add(new ElasticsearchNode(
-                path, clusterName + "-" + i, project, artifactsExtractDir, workingDirBase
-            ));
+                path, clusterName + "-" + i, project, workingDirBase, distributionFactory.apply(i)
+                ));
         }
     }
 
@@ -121,8 +120,8 @@ public void setVersion(String version) {
     }
 
     @Override
-    public void setDistribution(Distribution distribution) {
-        nodes.all(each -> each.setDistribution(distribution));
+    public void setTestDistribution(TestDistribution distribution) {
+        nodes.all(each -> each.setTestDistribution(distribution));
     }
 
     @Override
@@ -248,7 +247,7 @@ public void start() {
         for (ElasticsearchNode node : nodes) {
             if (nodeNames != null) {
                 // Can only configure master nodes if we have node names defined
-                if (Version.fromString(node.getVersion()).getMajor() >= 7) {
+                if (node.getVersion().getMajor() >= 7) {
                     node.defaultConfig.put("cluster.initial_master_nodes", "[" + nodeNames + "]");
                     node.defaultConfig.put("discovery.seed_providers", "file");
                     node.defaultConfig.put("discovery.seed_hosts", "[]");
@@ -338,12 +337,6 @@ public boolean isProcessAlive() {
         return nodes.stream().noneMatch(node -> node.isProcessAlive() == false);
     }
 
-    void eachVersionedDistribution(BiConsumer<String, Distribution> consumer) {
-        nodes.forEach(each -> {
-            consumer.accept(each.getVersion(), each.getDistribution());
-        });
-    }
-
     public ElasticsearchNode singleNode() {
         if (nodes.size() != 1) {
             throw new IllegalStateException(