Introduce command to perform an rc-release on a maven central repository.

See #38

src/main/java/org/springframework/data/release/build/BuildOperations.java

@@ -45,6 +45,7 @@ import org.springframework.util.Assert;
 /**
  * @author Oliver Gierke
  * @author Mark Paluch
+ * @author Greg Turnquist
  */
 @Component
 @RequiredArgsConstructor
@@ -162,6 +163,20 @@ public class BuildOperations {
 		});
 	}
 
+	/**
+	 * Releases a repository of staged artifacts for this {@link ModuleIteration}.
+	 * 
+	 * @param iteration
+	 * @param stagingRepository
+	 */
+	public void release(ModuleIteration iteration, StagingRepository stagingRepository) {
+
+		doWithBuildSystem(iteration, (buildSystem, moduleIteration) -> {
+			buildSystem.release(stagingRepository);
+			return null;
+		});
+	}
+
 	public void buildDocumentation(TrainIteration iteration) {
 
 		executor.doWithBuildSystemOrdered(Streamable.of(iteration.getModulesExcept(BOM, COMMONS, BUILD)),
@@ -202,6 +217,10 @@ public class BuildOperations {
 
 		logger.log(iteration, "Release: %s", summary);
 
+		if (iteration.getIteration().isPublic() && stagingRepository.isPresent()) {
+			release(module, stagingRepository);
+		}
+
 		return summary.getExecutions().stream().map(BuildExecutor.ExecutionResult::getResult).collect(Collectors.toList());
 	}
 

src/main/java/org/springframework/data/release/build/BuildSystem.java

@@ -30,6 +30,7 @@ import org.springframework.plugin.core.Plugin;
  *
  * @author Oliver Gierke
  * @author Mark Paluch
+ * @author Greg Turnquist
  */
 interface BuildSystem extends Plugin<Project> {
 
@@ -68,6 +69,11 @@ interface BuildSystem extends Plugin<Project> {
 	 */
 	void close(StagingRepository stagingRepository);
 
+	/**
+	 * Release a remote repository of staged artifacts.
+	 */
+	void release(StagingRepository stagingRepository);
+
 	<M extends ProjectAware> M triggerBuild(M module);
 
 	<M extends ProjectAware> M triggerDocumentationBuild(M module);

src/main/java/org/springframework/data/release/build/MavenBuildSystem.java

@@ -387,6 +387,23 @@ class MavenBuildSystem implements BuildSystem {
 		logger.log(iteration, "✅ Smoke tests passed. Do not smoke 🚭. It's unhealthy.");
 	}
 
+	/**
+	 * Perform a {@literal nexus-staging:rc-release}.
+	 */
+	@Override
+	public void release(StagingRepository stagingRepository) {
+
+		Assert.notNull(stagingRepository, "StagingRepository must not be null");
+		Assert.isTrue(stagingRepository.isPresent(), "StagingRepository must be present");
+
+		CommandLine arguments = CommandLine.of(goal("nexus-staging:rc-release"), //
+				profile("central"), //
+				arg("stagingRepositoryId").withValue(stagingRepository.getId()))
+				.andIf(!ObjectUtils.isEmpty(properties.getSettingsXml()), () -> settingsXml(properties.getSettingsXml()));
+
+		mvn.execute(BUILD, arguments);
+	}
+
 	@Override
 	public <M extends ProjectAware> M triggerDocumentationBuild(M module) {
 

src/main/java/org/springframework/data/release/cli/ReleaseCommands.java

@@ -46,6 +46,7 @@ import org.springframework.util.Assert;
 
 /**
  * @author Oliver Gierke
+ * @author Greg Turnquist
  */
 @CliComponent
 @RequiredArgsConstructor
@@ -149,6 +150,15 @@ class ReleaseCommands extends TimedCommand {
 		}
 	}
 
+	@CliCommand(value = "release repository")
+	public void repositoryRelease(@CliOption(key = "", mandatory = true) TrainIteration iteration,
+			@CliOption(key = "stagingRepositoryId", mandatory = true) String stagingRepositoryId) {
+
+		if (iteration.getIteration().isPublic()) {
+			build.release(iteration.getModule(Projects.BUILD), StagingRepository.of(stagingRepositoryId));
+		}
+	}
+
 	@CliCommand(value = "release build")
 	public void buildRelease(@CliOption(key = "", mandatory = true) TrainIteration iteration, //
 			@CliOption(key = "project", mandatory = false) String projectName) {