tasks.register('generateKeystore') {
    group  'sign'
    description 'create jks'
    doFirst {
        def keytoolPath=project.property("sign.keytool.path")
        def keypass=project.property("sign.keytool.keypass")
        def keystore=project.property("sign.keytool.storepass")
        def dName=project.property("sign.keytool.dname")
        def appAlias=project.property("sign.keytool.appAlias")
        def keystorePath = "$project.project.projectDir.absolutePath\\app\\sign\\jxit.jks"
        exec {
            workingDir "."
            commandLine "$keytoolPath", "-genkey","-v",
                    "-alias", appAlias,
                    "-keyalg", "RSA",
                    "-keypass", keypass,
                    "-storepass", keystore,
                    "-keystore", keystorePath,
                    "-keysize" ,2048,
                    "-validity", 30,
                    "-dname",dName
        }
    }
}