DMG packaging of JavaFX application written in Kotlin (and powered by Spring Boot) using "javafx-gradle-plugin"

build.gradle

buildscript {
    ext {
        kotlinVersion = "1.2.21"
        springBootVersion = "1.5.10.RELEASE"
        javafxGradlePluginVersion = "8.8.0"
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")

        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
        classpath("org.jetbrains.kotlin:kotlin-allopen:$kotlinVersion")
        classpath("org.jetbrains.kotlin:kotlin-noarg:$kotlinVersion")

        classpath("de.dynamicfiles.projects.gradle.plugins:javafx-gradle-plugin:$javafxGradlePluginVersion")
    }
}

apply plugin: "kotlin"
apply plugin: "kotlin-spring"
apply plugin: "idea"
apply plugin: "java"
apply plugin: "org.springframework.boot"
apply plugin: "javafx-gradle-plugin"

group = "com.companyname"
version = "1.0.0"
sourceCompatibility = 1.8

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}


repositories {
    mavenCentral()
}


dependencies {
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8:${kotlinVersion}")
    compile("org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}")

    compile("org.springframework.boot:spring-boot-starter")
    compile("javax.inject:javax.inject:1")
    compile("org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:1.0.2")
    compile("org.apache.httpcomponents:httpclient:4.5.5")
    compile("org.controlsfx:controlsfx:8.40.14")
    compile("org.jsoup:jsoup:1.11.2")
    testCompile("org.springframework.boot:spring-boot-starter-test")
}

jfx {
    verbose = true
    mainClass = "com.companyname.MyApplication"
    jfxAppOutputDir = "build/jfx/app"
    jfxMainAppJarName = "my-application.jar"
    deployDir = "src/main/deploy"
    useEnvironmentRelativeExecutables = true
    libFolderName = "lib"


    // gradle jfxJar
    css2bin = false
    preLoader = null // String
    updateExistingJar = false
    allPermissions = false
    manifestAttributes = null // Map<String, String>
    addPackagerJar = true
    copyAdditionalAppResourcesToJar = false
    skipCopyingDependencies = false
    useLibFolderContentForManifestClasspath = false
    fixedManifestClasspath = null


    // gradle jfxNative
    identifier = null                      // String - setting this for windows-bundlers makes it possible to generate upgradeable installers (using same GUID)
    vendor = "Company Name"
    nativeOutputDir = "build/jfx/native"
    bundler = "dmg"
    jvmProperties = null                   // Map<String, String>
    jvmArgs = null                         // List<String>
    userJvmArgs = null                     // Map<String, String>
    launcherArguments = null               // List<String>
    nativeReleaseVersion = "$version"
    needShortcut = false
    needMenu = false

    //bundleArguments = [
        //runtime: null, // dont bundle JRE, useful for faster builds during testing
        //licenseType: 'ASL 2.0',
        //licenseFile: 'LICENSE'
    //]

    appName = "My Application"                // this is used for files below "src/main/deploy", e.g. "src/main/deploy/package/windows/project.ico"
    additionalBundlerResources = null         // path to some additional resources for the bundlers when creating application-bundle
    additionalAppResources = null             // path to some additional resources when creating application-bundle
    fileAssociations = null                   // List<Map<String, Object>>
    noBlobSigning = false                     // when using bundler "jnlp", you can choose to NOT use blob signing
    customBundlers = null                     // List<String>
    failOnError = true
    onlyCustomBundlers = false
    skipJNLP = true
    skipNativeVersionNumberSanitizing = false // anything than numbers or dots are removed
    additionalJarsignerParameters = null      // List<String>
    skipMainClassScanning = false             // set to true might increase build-speed

    skipNativeLauncherWorkaround124 = false
    skipNativeLauncherWorkaround167 = false
    skipNativeLauncherWorkaround205 = false
    skipJNLPRessourcePathWorkaround182 = false
    skipSigningJarFilesJNLP185 = false
    skipSizeRecalculationForJNLP185 = false
    skipMacBundlerWorkaround = false

}

Just some comment about the configuration-flags, the README.md of the project contains the default-values, they are not required to be added when not changed ;) makes the configuration a bit cleaner/smaller.