ProGuard + Spring Boot + Maven Plugin - maven

Question

Guys, I'm trying to obfuscate a .jar application using the proguard-maven-plugin.
When I try to perform the obfuscate process, I get error messages stating that there are unexpected classes.
I'm using the Spring Boot 1.4.1.RELEASE and Proguard Maven Plugin 2.0.13.
This is my proguard.conf
-injars /workspace/base/target/test-1.0.0.jar
-libraryjars /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/rt.jar
-dontshrink
-dontoptimize
-dontobfuscate
-dontusemixedcaseclassnames
-keepattributes Exceptions,InnerClasses,Signature,Deprecated,SourceFile,LineNumberTable,LocalVariable*Table,*Annotation*,Synthetic,EnclosingMethod
-adaptresourcefilenames **.properties
-adaptresourcefilecontents **.properties,META-INF/MANIFEST.MF
-dontpreverify
-verbose
-keepclasseswithmembers public class * {
public static void main(java.lang.String[]);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * extends java.beans.BeanInfo
-keep class * {
void set*(***);
void set*(int,***);
boolean is*();
boolean is*(int);
*** get*();
*** get*(int);
}
-assumenosideeffects public class java.lang.System {
public static long currentTimeMillis();
static java.lang.Class getCallerClass();
public static int identityHashCode(java.lang.Object);
public static java.lang.SecurityManager getSecurityManager();
public static java.util.Properties getProperties();
public static java.lang.String getProperty(java.lang.String);
public static java.lang.String getenv(java.lang.String);
public static java.lang.String mapLibraryName(java.lang.String);
public static java.lang.String getProperty(java.lang.String,java.lang.String);
}
The pom.xml file. I am only informing the configuration by the plugin.
<plugin>
<groupId>com.github.wvengen</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<version>2.0.13</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>proguard</goal>
</goals>
</execution>
</executions>
<configuration>
<obfuscate>false</obfuscate>
<outFilter>**/BOOT-INF/classes/ **.class</outFilter>
<proguardInclude>${basedir}/proguard.conf</proguardInclude>
<outputDirectory>${project.build.directory}</outputDirectory>
<injar>${project.build.finalName}.jar</injar>
<outjar>${project.build.finalName}-min.jar</outjar>
</configuration>
</plugin>
However, during the execution process I get the following return for all classes in my application.
Warning: class [BOOT-INF/classes/br/com/base/BaseApplication.class] unexpectedly contains class [br.com.base.BaseApplication]
Warning: class [BOOT-INF/classes/br/com/base/controller/CaixaController.class] unexpectedly contains class [br.com.base.controller.CaixaController]
[...]
And the final output of ProGuard. PS: All classes are in the BOOT-INF/classes directory
Warning: there were 97 classes in incorrectly named files.
You should make sure all file names correspond to their class names.
The directory hierarchies must correspond to the package hierarchies.
(http://proguard.sourceforge.net/manual/troubleshooting.html#unexpectedclass)
If you don't mind the mentioned classes not being written out,
you could try your luck using the '-ignorewarnings' option.
Please correct the above warnings first.
Can anyone imagine any alternatives I can try?
Thanks.

Answer 1

In order to fix this, I made sure to change the order of the plugins in the pom. The proguard plugin should go first, followed by the spring boot plugin.
Additionally, make sure you have the <goal>repackage</goal> specified in the spring boot configuration. With the correct order and the repackage goal specified, the proguard obfuscation/optimization/whatever you have configured will take place and produce a jar. Then the spring boot plugin will repackage that jar as an executable and everything should work.
My plugin configuration from pom.xml:
<project ...>
....
<plugin>
<groupId>com.github.wvengen</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>proguard</goal>
</goals>
</execution>
</executions>
<configuration>
<proguardInclude>${basedir}/proguard.conf</proguardInclude>
<libs>
<lib>${java.home}/lib/rt.jar</lib>
<lib>${java.home}/lib/jce.jar</lib>
</libs>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<start-class>org.springframework.boot.loader.JarLauncher</start-class>
</configuration>
</execution>
</executions>
</plugin>
...