import javaposse.jobdsl.dsl.DslFactory
import javaposse.jobdsl.dsl.Job
def setEnvironmentVars(Map<String, String> envVars, Job job) {
  
  job.with {
    
    // exists2 to rule out there is some other variable/method whatever with that name
    boolean exists2 = false
    println "1 -> ${exists2} ${new Date().format("yyyyMMdd-HH:mm:ss.SSS")}"
    
    // This configure block is evaluated AFTER the if statement below. The outputs 2/3 are always
    // after 4/5
    configure {
      if ( (it / 'properties').get('EnvInjectJobProperty') ) {
        println "2 -> exists2 = ${exists2} ${new Date().format("yyyyMMdd-HH:mm:ss.SSS")}"
        exists2 = true
        println "switched exists to true"
        println "3 -> exists2 = ${exists2} ${new Date().format("yyyyMMdd-HH:mm:ss.SSS")}"
      }
    }
    
    // exists2 is false here ALWAYS ... even if the evironmentVariables section below is active
    // and the check in the configure block above leads to exists2 beeing changed to true
    println "4 -> exists2 = ${exists2} ${new Date().format("yyyyMMdd-HH:mm:ss.SSS")}"
    
    // This sleep even delays the execution of the configure block above !?!?!?
    sleep 2000
    
    println "5 -> exists2 = ${exists2} ${new Date().format("yyyyMMdd-HH:mm:ss.SSS")}"
  
    // Because i can't get the check in the configure block above to evaluate before getting here
    // its impossible for me to correctly append or set the environment variables here. They are
    // always set therefore overwriting any previous values. 
    if (exists2) {
	    configure {
	      newprops = envVars.collect {
    	        key, value -> "${key}=${value}" }.
        	  join("\n") 
          props = it / 'properties' / 'EnvInjectJobProperty' / 'info' / 'propertiesContent'
          props.setValue( (props.value() ?: "") + "\n" + newprops)       
        }
    } else {    
      environmentVariables {
        envVars.each { key, value ->
          env(key, value)
        }
      }
    }
  }
}
freeStyleJob("HalloWelt-TEST") { job ->  /** The idea is to have this working with or without this environmentVariables */
  environmentVariables {
    env("HALLO", "WORLD")
    env("A", "B")
  }
  
  setEnvironmentVars(["A": "B", "C": "D"], job)
} 

1 -> false 20190110-11:06:56.824
4 -> false 20190110-11:06:56.828
5 -> false 20190110-11:06:58.829
2 -> false 20190110-11:06:58.834
3 -> true 20190110-11:06:58.834 

1 -> false 20190110-11:06:56.824
2 -> false 20190110-11:06:58.834
3 -> true 20190110-11:06:58.834 
4 -> true 20190110-11:06:56.855
5 -> true 20190110-11:06:58.855