jar {
    manifest {
        attributes(
                'Main-Class': 'checkmydigitalfootprint.MainApp'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
 }

java -jar CheckMyDigitalFootprint.jar

java -jar CheckMyDigitalFootprint.jar --module-path="/users/joseph/eclipse-workspace/javafx-sdk-11.0.1/lib" --add-modules=javafx.controls

java -jar CheckMyDigitalFootprint.jar --module-path="/users/joseph/eclipse-workspace/javafx-sdk-11.0.1/lib" --add-modules=javafx.controls --add-exports=javafx.graphics/com.sun.javafx.util=ALL-UNNAMED --add-exports=javafx.base/com.sun.javafx.reflect=ALL-UNNAMED --add-exports=javafx.base/com.sun.javafx.beans=ALL-UNNAMED --add-exports=javafx.graphics/com.sun.glass.utils=ALL-UNNAMED --add-exports=javafx.graphics/com.sun.javafx.tk=ALL-UNNAMED

Error: JavaFX runtime components are missing, and are required to run this application

plugins {
  id 'application'
  id 'org.openjfx.javafxplugin' version '0.0.5'
  id 'eclipse'
}

repositories {
    mavenCentral()
}

dependencies {
    /* uncomment for cross-platform jar: */
//    compile "org.openjfx:javafx-graphics:11:win"
//    compile "org.openjfx:javafx-graphics:11:linux"
    compile "org.openjfx:javafx-graphics:11:mac"
    compile 'com.jfoenix:jfoenix:9.0.8'
    compile 'org.json:json:20180813'
    compile 'com.google.api-client:google-api-client:1.23.0'
    compile 'com.google.oauth-client:google-oauth-client-jetty:1.23.0'
    compile 'com.google.apis:google-api-services-gmail:v1-rev83-1.23.0'
    compile group: 'org.glassfish.jaxb', name: 'jaxb-runtime', version: '2.3.1'
    compile 'com.sun.activation:javax.activation:1.2.0'
    compile group: 'com.sun.mail', name: 'javax.mail', version: '1.6.2'
    testCompile "org.testfx:testfx-core:4.0.15-alpha"
    testCompile "org.testfx:testfx-junit:4.0.15-alpha"
}

javafx {
    modules = [ 'javafx.controls', 'javafx.fxml' ]
}

run {
    if (osdetector.os == 'windows') {
        // Temporal fix for Eclipse with JDK 1.8 and Windows
        systemProperty "java.library.path", "C:tmp"
    }
}

jar {
    manifest {
        attributes(
                'Main-Class': 'checkmydigitalfootprint.MainApp'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
 }

mainClassName = 'checkmydigitalfootprint.MainApp'