Added command to wipe the workspace.

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

@@ -30,7 +30,7 @@ import org.springframework.shell.core.annotation.CliOption;
 @CliComponent
 public class ModelCommands implements CommandMarker {
 
-	@CliCommand("trains")
+	@CliCommand(value = "trains", help = "Displays all release trains or contents of them if a name is provided")
 	public String train(@CliOption(key = { "", "train" }) Train train) {
 
 		return train != null ? train.toString()

src/main/java/org/springframework/data/release/io/Workspace.java

@@ -22,7 +22,11 @@ import lombok.RequiredArgsConstructor;
 import java.io.File;
 import java.io.IOException;
 import java.nio.charset.Charset;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Arrays;
 import java.util.Scanner;
 import java.util.stream.Stream;
@@ -36,8 +40,6 @@ import org.springframework.data.release.model.Project;
 import org.springframework.stereotype.Component;
 import org.springframework.util.Assert;
 
-import com.google.common.io.Files;
-
 /**
  * Abstraction of the workspace that is used to work with the {@link Project}'s repositories, execute builds, etc.
  * 
@@ -61,6 +63,35 @@ public class Workspace {
 		return ioProperties.getWorkDir();
 	}
 
+	/**
+	 * Cleans up the working directory by removing all files and folders in it.
+	 * 
+	 * @throws IOException
+	 */
+	public void cleanup() throws IOException {
+
+		Path workingDirPath = getWorkingDirectory().toPath();
+
+		Files.walkFileTree(workingDirPath, new SimpleFileVisitor<Path>() {
+
+			@Override
+			public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+				Files.delete(file);
+				return FileVisitResult.CONTINUE;
+			}
+
+			@Override
+			public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+
+				if (!workingDirPath.equals(dir)) {
+					Files.delete(dir);
+				}
+
+				return FileVisitResult.CONTINUE;
+			}
+		});
+	}
+
 	/**
 	 * Returns the directory for the given {@link Project}.
 	 * 
@@ -151,7 +182,7 @@ public class Workspace {
 	private void writeContentToFile(String name, Project project, String content) throws IOException {
 
 		File file = getFile(name, project);
-		Files.write(content, file, UTF_8);
+		com.google.common.io.Files.write(content, file, UTF_8);
 	}
 
 	/**

src/main/java/org/springframework/data/release/io/WorkspaceCommands.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.release.io;
+
+import lombok.RequiredArgsConstructor;
+
+import java.io.IOException;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.release.CliComponent;
+import org.springframework.data.release.utils.Logger;
+import org.springframework.shell.core.CommandMarker;
+import org.springframework.shell.core.annotation.CliCommand;
+
+/**
+ * @author Oliver Gierke
+ */
+@CliComponent
+@RequiredArgsConstructor(onConstructor = @__(@Autowired) )
+public class WorkspaceCommands implements CommandMarker {
+
+	private final Workspace workspace;
+	private final Logger logger;
+
+	@CliCommand("workspace cleanup")
+	public void cleanup() throws IOException {
+
+		logger.log("Workspace", "Cleaning up workspace directory at %s.",
+				workspace.getWorkingDirectory().getAbsolutePath());
+
+		workspace.cleanup();
+	}
+}