Disable attach of repackaged artifact

This commit allows to generate the packaged artifact only locally by
adding a new `attach` property. If `attach` is set to `false` explicitly,
only the main artifact is installed/deployed.

Closes gh-5258

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java

@@ -37,6 +37,7 @@ import org.springframework.lang.UsesJava8;
  *
  * @author Phillip Webb
  * @author Andy Wilkinson
+ * @author Stephane Nicoll
  */
 public class Repackager {
 
@@ -140,8 +141,7 @@ public class Repackager {
 		destination = destination.getAbsoluteFile();
 		File workingSource = this.source;
 		if (this.source.equals(destination)) {
-			workingSource = new File(this.source.getParentFile(),
+			workingSource = getBackupFile();
-					this.source.getName() + ".original");
 			workingSource.delete();
 			renameFile(this.source, workingSource);
 		}
@@ -162,6 +162,15 @@ public class Repackager {
 		}
 	}
 
+	/**
+	 * Return the {@link File} to use to backup the original source.
+	 * @return the file to use to backup the original source
+	 */
+	public File getBackupFile() {
+		return new File(this.source.getParentFile(),
+			this.source.getName() + ".original");
+	}
+
 	private boolean alreadyRepackaged() throws IOException {
 		JarFile jarFile = new JarFile(this.source);
 		try {

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-attach-disabled/invoker.properties

@@ -0,0 +1 @@
+invoker.goals=clean install

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-attach-disabled/pom.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>org.springframework.boot.maven.it</groupId>
+	<artifactId>jar-attach-disabled</artifactId>
+	<version>0.0.1.BUILD-SNAPSHOT</version>
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>@project.groupId@</groupId>
+				<artifactId>@project.artifactId@</artifactId>
+				<version>@project.version@</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+						<configuration>
+							<attach>false</attach>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jar-plugin</artifactId>
+				<version>2.4</version>
+				<configuration>
+					<archive>
+						<manifest>
+							<mainClass>some.random.Main</mainClass>
+						</manifest>
+						<manifestEntries>
+							<Not-Used>Foo</Not-Used>
+						</manifestEntries>
+					</archive>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-context</artifactId>
+			<version>@spring.version@</version>
+		</dependency>
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>javax.servlet-api</artifactId>
+			<version>@servlet-api.version@</version>
+			<scope>provided</scope>
+		</dependency>
+	</dependencies>
+</project>

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-attach-disabled/src/main/java/org/test/SampleApplication.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2012-2014 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.test;
+
+public class SampleApplication {
+
+	public static void main(String[] args) {
+	}
+
+}

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-attach-disabled/verify.groovy

@@ -0,0 +1,20 @@
+import java.io.*;
+import org.springframework.boot.maven.*
+
+import static org.junit.Assert.assertTrue;
+
+Verify.verifyJar(
+	new File( basedir, "target/jar-attach-disabled-0.0.1.BUILD-SNAPSHOT.jar" ), "some.random.Main"
+);
+File main = new File( basedir, "target/jar-attach-disabled-0.0.1.BUILD-SNAPSHOT.jar")
+File backup = new File( basedir, "target/jar-attach-disabled-0.0.1.BUILD-SNAPSHOT.jar.original")
+assertTrue 'backup file should exist', backup.exists()
+
+
+def file = new File(basedir, "build.log")
+assertTrue 'main artifact should have been updated',
+		file.text.contains("Updating main artifact " + main + " to " + backup)
+return file.text.contains ("Installing "+backup)
+
+
+

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RepackageMojo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2016 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.
@@ -95,8 +95,10 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 
 	/**
 	 * Classifier to add to the artifact generated. If given, the artifact will be
-	 * attached. If this is not given, it will merely be written to the output directory
+	 * attached with that classifier and the main artifact will be deployed as the
-	 * according to the finalName. Attaching the artifact allows to deploy it alongside to
+	 * main artifact. If this is not given (default), it will replace the
+	 * main artifact and only the repackaged artifact will be deployed. Attaching
+	 * the artifact allows to deploy it alongside to
 	 * the original one, see <a href=
 	 * "http://maven.apache.org/plugins/maven-deploy-plugin/examples/deploying-with-classifiers.html"
 	 * > the maven documentation for more details</a>.
@@ -105,6 +107,13 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 	@Parameter
 	private String classifier;
 
+	/**
+	 * Attach the repackaged archive to be installed and deployed.
+	 * @since 1.4
+	 */
+	@Parameter(defaultValue = "true")
+	private boolean attach = true;
+
 	/**
 	 * The name of the main class. If not specified the first compiled class found that
 	 * contains a 'main' method will be used.
@@ -210,6 +219,8 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 		catch (IOException ex) {
 			throw new MojoExecutionException(ex.getMessage(), ex);
 		}
+
+		if (this.attach) {
 			if (this.classifier != null) {
 				getLog().info("Attaching archive: " + target + ", with classifier: "
 						+ this.classifier);
@@ -221,6 +232,12 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 				getLog().info("Replacing main artifact " + source + " to " + target);
 			}
 		}
+		else if (source.equals(target)) {
+			File backup = repackager.getBackupFile();
+			this.project.getArtifact().setFile(backup);
+			getLog().info("Updating main artifact " + source + " to " + backup);
+		}
+	}
 
 	private ArtifactsFilter[] getAdditionalFilters() {
 		if (this.excludeDevtools) {

spring-boot-tools/spring-boot-maven-plugin/src/site/apt/examples/repackage-disable-attach.apt.vm

@@ -0,0 +1,49 @@
+ -----
+ Local repackaged artifact
+ -----
+ Stephane Nicoll
+ -----
+ 2016-03-01
+ -----
+
+  By default, the <<<repackage>>> goal will replace the original artifact with the
+  executable one. If you need to only deploy the original jar and yet be able to
+  run your app with the regular file name, configure the plugin as follows:
+
+---
+<project>
+  ...
+  <build>
+    ...
+    <plugins>
+      ...
+      <plugin>
+        <groupId>${project.groupId}</groupId>
+        <artifactId>${project.artifactId}</artifactId>
+        <version>${project.version}</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>repackage</goal>
+            </goals>
+            <configuration>
+              <attach>false</attach>
+            </configuration>
+          </execution>
+        </executions>
+        ...
+      </plugin>
+      ...
+    </plugins>
+    ...
+  </build>
+  ...
+</project>
+---
+
+  This configuration will generate two artifacts: the original one and the executable counter
+  part produced by the repackage goal. Only the original one will be installed/deployed.
+
+
+
+

spring-boot-tools/spring-boot-maven-plugin/src/site/apt/index.apt

@@ -42,6 +42,8 @@ Spring Boot Maven Plugin
 
   * {{{./examples/repackage-classifier.html}Custom repackage classifier}}
 
+  * {{{./examples/repackage-disable-attach.html}Local repackaged artifact}}
+
   * {{{./examples/exclude-dependency.html}Exclude a dependency}}
 
   * {{{./examples/run-debug.html}Debug the application}}

spring-boot-tools/spring-boot-maven-plugin/src/site/site.xml

@@ -8,6 +8,7 @@
 		</menu>
 		<menu name="Examples">
 			<item name="Custom repackage classifier" href="examples/repackage-classifier.html"/>
+			<item name="Local repackaged artifact" href="examples/repackage-disable-attach.html"/>
 			<item name="Exclude a dependency" href="examples/exclude-dependency.html"/>
 			<item name="Debug the application" href="examples/run-debug.html"/>
 			<item name="Random port for integration tests" href="examples/it-random-port.html"/>