我正在使用 com.pyx4me.proguard-maven-plugin 来混淆多模块项目中的代码。如何混淆依赖于来自不同（混淆）模块的“朋友”方法的模块？我希望保留基本模块中的所有内容，但在依赖模块中尽可能地缩小/优化。我尝试了各种“keep*”、“dontoptimize”和“dontshrink”选项，但似乎没有任何帮助。来自https://groups.google.com/forum/#!topic/pyx4me-users/1auM9xSQkLY的交叉发帖。
上述项目结构产生以下错误：
[proguard] Warning: test.Bar: can't find referenced method 'void x()' in class test.Foo
[proguard] Warning: there were 1 unresolved references to program class members.
[proguard] Your input classes appear to be inconsistent.
/testproj/pom.xml
<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>group</groupId>
<artifactId>testproj</artifactId>
<version>1.0.0.0</version>
<packaging>pom</packaging>
<name>testproj</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<modules>
<module>testproj.a</module>
<module>testproj.b</module>
</modules>
</project>
/testproj/testproj.a/pom.xml
<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>group</groupId>
<artifactId>testproj.a</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>testproj.a</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<index>true</index>
<manifest>
<classpathPrefix>lib/</classpathPrefix>
<addClasspath>true</addClasspath>
<mainClass>com.holliswaite.swmf.FontTableModel</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<overWriteReleases>true</overWriteReleases>
<overWriteSnapshots>true</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.pyx4me</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>proguard</goal>
</goals>
</execution>
</executions>
<configuration>
<options>
<option>-keep class * {*;}</option>
</options>
<libs>
<lib>${java.home}/lib/rt.jar</lib>
<lib>${java.home}/lib/jsse.jar</lib>
</libs>
</configuration>
<dependencies>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard</artifactId>
<version>4.8</version>
<scope>runtime</scope>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
/testproj/testproj.b/pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>group</groupId>
<artifactId>testproj.b</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>testproj.b</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>testproj.a</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<index>true</index>
<manifest>
<classpathPrefix>lib/</classpathPrefix>
<addClasspath>true</addClasspath>
<mainClass>com.holliswaite.swmf.SWMFFrame</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<overWriteReleases>true</overWriteReleases>
<overWriteSnapshots>true</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.pyx4me</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>proguard</goal>
</goals>
</execution>
</executions>
<configuration>
<options>
<option>-allowaccessmodification</option>
<option>-keep public class test.Bar {*;}</option>
</options>
<libs>
<lib>${java.home}/lib/rt.jar</lib>
<lib>${java.home}/lib/jsse.jar</lib>
</libs>
</configuration>
<dependencies>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard</artifactId>
<version>4.8</version>
<scope>runtime</scope>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
/testproj/testproj.a/src/main/java/test/Foo.java
package test;
public class Foo {
void x() {}
public void y() {}
}
/testproj/testproj.b/src/main/java/test/Bar.java
package test;
public class Bar {void z() {(new Foo()).x();}}
引用y()工作正常，但调用x()会导致错误。