使用 mainClassName 中的 gradle 设置 Main-Class 标头

Question

如何

获取jar任务以从mainClassName变量设置Main-Class标头？

thufir@dur:~/NetBeansProjects/props$ 
thufir@dur:~/NetBeansProjects/props$ gradle clean assembleDist;java -jar build/libs/props.jar 
BUILD SUCCESSFUL in 1s
6 actionable tasks: 6 executed
Publishing build scan...
https://gradle.com/s/qwirajeu4guhq
no main manifest attribute, in build/libs/props.jar
thufir@dur:~/NetBeansProjects/props$ 
thufir@dur:~/NetBeansProjects/props$ cat build.gradle 
plugins {
    id 'com.gradle.build-scan' version '1.8' 
    id 'java'
    id 'application'
}
buildScan {
    licenseAgreementUrl = 'https://gradle.com/terms-of-service'
    licenseAgree = 'yes'
}
buildScan {
    publishAlways()
}
sourceCompatibility = 1.9
targetCompatibility = 1.9
mainClassName = 'net.bounceme.dur.props.Main'
jar {
    manifest {
//    attributes 'Main-Class': mainClassName
    attributes 'Class-Path': configurations.compile.collect { it.getName() }.join(' ')
    }
}
repositories {
    jcenter()
}
dependencies {
    // This dependency is found on compile classpath of this component and consumers.
  //  compile 'com.google.guava:guava:22.0'
    // Use JUnit test framework
//    testCompile 'junit:junit:4.12'
}

thufir@dur:~/NetBeansProjects/props$ 

Answer 1

version '1.0'
apply plugin: 'java'
apply plugin: 'application'
mainClassName = 'blah.blah.blah.blah.myMain'
jar {
  manifest {
    attributes(
      'Main-Class': mainClassName
    )
  }
}

这将导致MANIFEST.MF：

Manifest-Version: 1.0
Main-Class: blah.blah.blah.blah.myMain