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我想缩小一个使用Gradle shadow plugin创建的胖罐子。这样做的原因是我需要在完成的 jar 中的特定包中保留一些类，因为它们用于动态类生成（例如Class.forName(...)），并且该插件不允许我minimize()在阴影中调用时指定要保留的包jar 任务）。因此，我使用Proguard Gradle 插件。

buildscript {
    dependencies {
        classpath 'net.sf.proguard:proguard-gradle:6.2.2'
        classpath 'net.sf.proguard:proguard-base:6.2.2'
    }
}

plugins {
    id 'java-library'
    id 'application'
    id 'com.github.johnrengelman.shadow' version '5.2.0'
}

sourceCompatibility = 1.11

shadowJar {
    zip64 true
}

application {
    mainClassName = 'com.example.MyApp'
}

task proguard(type: proguard.gradle.ProGuardTask) {
    dependsOn shadowJar
    injars shadowJar

    outjars "${buildDir}/libs/${project.name}-${project.version}-proguard.jar"

    dontobfuscate
    dontoptimize
    keep 'class com.example.packagetokeep.*'

    // next block taken verbatim from Proguard's documentation examples:

    // Automatically handle the Java version of this build.
    if (System.getProperty('java.version').startsWith('1.')) {
        // Before Java 9, the runtime classes were packaged in a single jar file.
        libraryjars "${System.getProperty('java.home')}/lib/rt.jar"
    } else {
        // As of Java 9, the runtime classes are packaged in modular jmod files.
        libraryjars "${System.getProperty('java.home')}/jmods/java.base.jmod", jarfilter: '!**.jar', filter: '!module-info.class'
    }
}

所以，我想做的是创建一个包含所有依赖项的胖 jar，然后传递给 Proguard 以最小化。目前，我不想优化或混淆。

当我尝试运行该任务时，我收到了很多can't find referenced class类的错误，如javax.xml.stream.events.Attribute, java.sql.Timestamp, java.util.logging.Level. 我认为这是因为 Proguard 没有选择 Java 运行时库。这是错误摘要：

Warning: there were 75920 unresolved references to classes or interfaces.
         You may need to add missing library jars or update their versions.
         If your code works fine without the missing classes, you can suppress
         the warnings with '-dontwarn' options.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
Warning: there were 670 unresolved references to program class members.
         Your input classes appear to be inconsistent.
         You may need to recompile the code.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedprogramclassmember)
Warning: there were 4 unresolved references to library class members.
         You probably need to update the library versions.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedlibraryclassmember)

如何使 Proguard 与 Gradle 和 Java 11 一起工作？

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0 回答 0