Kann nicht mit Hilfe von AntBuilder in groovy

jar erstellen Ich versuche Ant Build meines Projekts mit groovy erstellen. Ich bekomme "Caught:: jar unterstützt nicht den" destdir "Attribut" Fehler beim Versuch, jar mit AntBuilder in groovy zu erstellen.Kann nicht mit Hilfe von AntBuilder in groovy

Meine groovy Datei ist als

build.groovy

Paket folgt com.groovy.core.utils

Import groovy.util.AntBuilder

Klasse build {

def ant = new groovy.util.AntBuilder() 

def base_dir = "C:/Users/abc/neon/GroovyAntDateUtils/" 
def src_dir = base_dir + "src" 
def lib_dir = "C:/Jars/groovy-2.4.12/lib" 
def build_dir = base_dir + "com/groovy/core/utils" 
def dist_dir = base_dir + "dist" 
def file_name = "DateUtils" 
/*, includeantruntime : "false"*/ 

static void main(args){ 
    println("hi welcome to groovy"); 
    def b = new build() 
    b.jar() 
    //b.run(args) 


} 
    def classpath = ant.path { 
    fileset(dir: "${lib_dir}"){ 
    include(name: "*.jar") 
    } 
    pathelement(path: "${build_dir}") 
    } 


    def clean(){ 
    ant.delete(dir : "${build_dir}") 
    ant.delete(dir : "${dist_dir}") 
    } 

    def jar(){ 
    clean() 
    buildFolder() 
    ant.mkdir(dir: "${dist_dir}") 
    ant.jar(destdir: "${dist_dir}/${file_name}.jar", basedir: "${build_dir}") 
    } 

    def compile(){ 
     ant.javac(destdir: "${build_dir}", srcdir: "${src_dir}", classpath: "${classpath}") 
    } 

    def buildFolder(){ 
    ant.mkdir(dir: "${build_dir}") 
    compile() 
    }

}

JDK - 1.8.0_121 ant & ant launcher - 1.9.0 groovy - 2.4.12

Quelle

2017-08-28 user1734698