HLREST: Bundle the x-pack protocol project (#31904)

The `:x-pack:protocol` project is an implementation detail shared by the
xpack projects and the high level rest client and really doesn't deserve
its own maven coordinants and published javadoc. This change bundles
`:x-pack:protocol` into the high level rest client.

Relates to #29827

client/rest-high-level/build.gradle

@@ -1,5 +1,3 @@
-import org.elasticsearch.gradle.precommit.PrecommitTasks
-
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -18,30 +16,86 @@ import org.elasticsearch.gradle.precommit.PrecommitTasks
  * specific language governing permissions and limitations
  * under the License.
  */
+
+import org.elasticsearch.gradle.precommit.PrecommitTasks
+import org.gradle.api.XmlProvider
+import org.gradle.api.publish.maven.MavenPublication
+
+buildscript {
+  repositories {
+    maven {
+      url 'https://plugins.gradle.org/m2/'
+    }
+  }
+  dependencies {
+    classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
+  }
+}
+
 apply plugin: 'elasticsearch.build'
 apply plugin: 'elasticsearch.rest-test'
 apply plugin: 'nebula.maven-base-publish'
 apply plugin: 'nebula.maven-scm'
+apply plugin: 'com.github.johnrengelman.shadow'
 
 group = 'org.elasticsearch.client'
 archivesBaseName = 'elasticsearch-rest-high-level-client'
 
 publishing {
-    publications {
-        nebula {
-            artifactId = archivesBaseName
+  publications {
+    nebula(MavenPublication) {
+      artifact shadowJar
+      artifactId = archivesBaseName
+      /*
+       * Configure the pom to include the "shadow" as compile dependencies
+       * because that is how we're using them but remove all other dependencies
+       * because they've been shaded into the jar.
+       */
+      pom.withXml { XmlProvider xml ->
+        Node root = xml.asNode()
+        root.remove(root.dependencies)
+        Node dependenciesNode = root.appendNode('dependencies')
+        project.configurations.shadow.allDependencies.each {
+          if (false == it instanceof SelfResolvingDependency) {
+            Node dependencyNode = dependenciesNode.appendNode('dependency')
+            dependencyNode.appendNode('groupId', it.group)
+            dependencyNode.appendNode('artifactId', it.name)
+            dependencyNode.appendNode('version', it.version)
+            dependencyNode.appendNode('scope', 'compile')
+          }
         }
+      }
     }
+  }
+}
+
+/*
+ * We need somewhere to configure dependencies that we don't wish to shade
+ * into the high level REST client. The shadow plugin creates a "shadow"
+ * configuration which is *almost* exactly that. It is never bundled into
+ * the shaded jar but is used for main source compilation. Unfortunately,
+ * by default it is not used for *test* source compilation and isn't used
+ * in tests at all. This change makes it available for test compilation.
+ * A change below makes it available for testing.
+ */
+sourceSets {
+  test {
+    compileClasspath += configurations.shadow
+  }
 }
 
 dependencies {
-  compile "org.elasticsearch:elasticsearch:${version}"
-  compile "org.elasticsearch.client:elasticsearch-rest-client:${version}"
-  compile "org.elasticsearch.plugin:parent-join-client:${version}"
-  compile "org.elasticsearch.plugin:aggs-matrix-stats-client:${version}"
-  compile "org.elasticsearch.plugin:rank-eval-client:${version}"
-  compile "org.elasticsearch.plugin:lang-mustache-client:${version}"
-  compile project(':x-pack:protocol') // TODO bundle into the jar
+  /*
+   * Everything in the "shadow" configuration is *not* copied into the
+   * shadowJar.
+   */
+  shadow "org.elasticsearch:elasticsearch:${version}"
+  shadow "org.elasticsearch.client:elasticsearch-rest-client:${version}"
+  shadow "org.elasticsearch.plugin:parent-join-client:${version}"
+  shadow "org.elasticsearch.plugin:aggs-matrix-stats-client:${version}"
+  shadow "org.elasticsearch.plugin:rank-eval-client:${version}"
+  shadow "org.elasticsearch.plugin:lang-mustache-client:${version}"
+  compile project(':x-pack:protocol')
 
   testCompile "org.elasticsearch.client:test:${version}"
   testCompile "org.elasticsearch.test:framework:${version}"
@@ -64,3 +118,48 @@ forbiddenApisMain {
   signaturesURLs += [PrecommitTasks.getResource('/forbidden/http-signatures.txt')]
   signaturesURLs += [file('src/main/resources/forbidden/rest-high-level-signatures.txt').toURI().toURL()]
 }
+
+shadowJar {
+  classifier = null
+  mergeServiceFiles()
+}
+
+// We don't need normal jar, we use shadow jar instead
+jar.enabled = false
+assemble.dependsOn shadowJar
+
+javadoc {
+  /*
+   * Bundle all of the javadoc from all of the shaded projects into this one
+   * so we don't *have* to publish javadoc for all of the "client" jars.
+   */
+  configurations.compile.dependencies.all { Dependency dep ->
+    Project p = dependencyToProject(dep)
+    if (p != null) {
+      evaluationDependsOn(p.path)
+      source += p.sourceSets.main.allJava
+    }
+  }
+}
+
+/*
+ * Use the jar for testing so we have tests of the bundled jar.
+ * Use the "shadow" configuration for testing because we need things
+ * in it.
+ */
+test {
+  classpath -= compileJava.outputs.files
+  classpath -= configurations.compile
+  classpath -= configurations.runtime
+  classpath += configurations.shadow
+  classpath += shadowJar.outputs.files
+  dependsOn shadowJar
+}
+integTestRunner {
+  classpath -= compileJava.outputs.files
+  classpath -= configurations.compile
+  classpath -= configurations.runtime
+  classpath += configurations.shadow
+  classpath += shadowJar.outputs.files
+  dependsOn shadowJar
+}

qa/ccs-unavailable-clusters/build.gradle

@@ -21,5 +21,5 @@ apply plugin: 'elasticsearch.rest-test'
 apply plugin: 'elasticsearch.test-with-dependencies'
 
 dependencies {
-    testCompile project(path: ':client:rest-high-level', configuration: 'runtime')
-}
+    testCompile project(path: ':client:rest-high-level', configuration: 'shadow')
+}