gradle.md

Gradle

Executable JAR

With plain JAR plugin:

This is the default Gradle task for creating a JAR archive. It packages your
compiled class files (*.class) and resources from your project into a single JAR
file.

It does not include any dependencies in the JAR. Your application needs the
libraries it depends on to be installed separately on the target system.

plugins {
    id 'java'
    id 'application'
}

group = 'com.zetcode'
version = '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

application {
    mainClass = 'com.zetcode.Main'
}

jar {
    duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
    manifest {
        attributes(
                'Main-Class': 'com.zetcode.Main'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
}

With shadow JAR plugin:

It creates a fat JAR or shadow JAR, which is a single JAR containing your
application code and all its transitive dependencies.

It makes deployment easier as you only need to distribute the single JAR file
containing everything your application needs. The JAR file will be larger due to
the inclusion of all dependencies.

plugins {
    id 'java'
    id 'application'
    id 'io.github.goooler.shadow' version '8.1.8'
}

group = 'com.zetcode'
version = '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

application {
    mainClass = 'com.zetcode.Main'
}

dependencies {
    implementation 'org.eclipse.collections:eclipse-collections:11.1.0'
}

jar {
//    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
    duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
    exclude 'META-INF/*.RSA', 'META-INF/*.SF', 'META-INF/*.DSA'
    manifest {
        attributes(
                'Main-Class': 'com.zetcode.Main'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
}