Include Gradle Plugin to generate Maven BOM.

Refactor the spring-geode-bom module.

buildSrc/src/main/groovy/io/spring/gradle/convention/ArtifactoryPlugin.groovy

@@ -46,6 +46,7 @@ class ArtifactoryPlugin implements Plugin<Project> {
 				}
 				defaults {
 					publications('mavenJava')
+					publishConfigs('archives')
 				}
 			}
 		}

buildSrc/src/main/groovy/io/spring/gradle/convention/MavenBomPlugin.groovy

@@ -17,8 +17,6 @@ package io.spring.gradle.convention
 
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.gradle.api.plugins.JavaPlatformPlugin
-import org.springframework.gradle.CopyPropertiesPlugin
 import org.springframework.gradle.maven.SpringMavenPlugin
 
 /**
@@ -27,9 +25,44 @@ import org.springframework.gradle.maven.SpringMavenPlugin
  */
 class MavenBomPlugin implements Plugin<Project> {
 
+	static String MAVEN_BOM_TASK_NAME = "mavenBom"
+
+	@Override
 	void apply(Project project) {
-		project.plugins.apply(JavaPlatformPlugin)
+
+		// Declares a new configuration that will be used to associate with Project artifacts
+		// (namely, the Maven BOM file).
+		project.configurations {
+			archives
+		}
+
+		project.group = project.rootProject.group
 		project.plugins.apply(SpringMavenPlugin)
-		project.plugins.apply(CopyPropertiesPlugin)
+
+		Utils.skipProjectWithSonarQubePlugin(project)
+
+		project.task(MAVEN_BOM_TASK_NAME, type: MavenBomTask, group: 'Generate',
+			description: 'Configures the Maven POM as a Maven BOM (Bill of Materials)')
+
+		project.tasks.artifactoryPublish.dependsOn project.mavenBom
+		project.tasks.publishToOssrh.dependsOn project.mavenBom
+
+		project.rootProject.allprojects.each { p ->
+			p.plugins.withType(SpringMavenPlugin) {
+				if (!project.name.equals(p.name)) {
+					project.mavenBom.projects.add(p)
+				}
+			}
+		}
+
+		// TODO: Shouldn't this be { archives project.mavenBom } according to:
+		//  https://docs.gradle.org/current/javadoc/org/gradle/api/Project.html#getArtifacts--
+		// TODO: Is this even necessary since this block is defined in MavenBomTask?
+		project.artifacts {
+			archives project.mavenBom.bomFile
+		}
+
+		// TODO: Why?
+		Utils.configureDeployArtifactsTask(project)
 	}
 }

buildSrc/src/main/groovy/io/spring/gradle/convention/MavenBomTask.groovy

@@ -0,0 +1,73 @@
+package io.spring.gradle.convention
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.Project
+import org.gradle.api.publish.maven.MavenPublication
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+
+class MavenBomTask extends DefaultTask {
+
+	@OutputFile
+	File bomFile
+
+	@Internal
+	Set<Project> projects = []
+
+	@Input
+	Set<String> getProjectNames() {
+		return projects*.name as Set
+	}
+
+	MavenBomTask() {
+
+		this.group = "Generate"
+		this.description = "Generates a Maven BOM (Bill of Materials)." +
+			" See https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Importing_Dependencies"
+		this.projects = project.subprojects
+		this.bomFile = project.file("${->project.buildDir}/maven-bom/${->project.name}-${->project.version}.txt")
+		this.outputs.upToDateWhen { false }
+	}
+
+	@TaskAction
+	void configureBom() {
+
+		bomFile.parentFile.mkdirs()
+		bomFile.write("Maven BOM (Bill of Materials)" +
+			" See https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Importing_Dependencies")
+
+		// TODO: Shouldn't this be { archives project.mavenBom } according to:
+		//  https://docs.gradle.org/current/javadoc/org/gradle/api/Project.html#getArtifacts--
+		project.artifacts {
+			// Workaround GRADLE-2406 by attaching text artifact
+			archives(bomFile)
+		}
+
+		project.publishing {
+			publications {
+				mavenJava(MavenPublication) {
+					pom {
+						packaging = "pom"
+						withXml {
+							asNode().children().last() + {
+								delegate.dependencyManagement {
+									delegate.dependencies {
+										projects.sort { dep -> "$dep.group:$dep.name" }.each { p ->
+											delegate.dependency {
+												delegate.groupId(p.group)
+												delegate.artifactId(p.name)
+												delegate.version(p.version)
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}

buildSrc/src/main/resources/META-INF/gradle-plugins/gemfire-server.properties

@@ -1 +0,0 @@
-implementation-class=build.GemFireServerPlugin

spring-geode-bom/spring-geode-bom.gradle

@@ -1,13 +1 @@
-import io.spring.gradle.convention.SpringModulePlugin
-
-apply plugin: 'io.spring.convention.bom'
-
-sonarqube.skipProject = true
-
-project.rootProject.allprojects.each { p ->
-    p.plugins.withType(SpringModulePlugin) {
-        if (!project.name.equals(p.name)) {
-            project.mavenBom.projects.add(p)
-        }
-    }
-}
+apply plugin: 'io.spring.convention.maven-bom'