Workspace path in job DSL within Jenkins pipeline

Question

I am creating a jenkins pipeline job to seed jobs using the jenkins job DSL plugin. How do I get the workspace path inside the DSL file? The jenkins pipeline code is as such:

#!groovy
  node{
    stage("build jobs"){
      ws{
        git poll: true,  credentialsId: 'xxx', url: 'ssh://git@aaaaa.cc.xxx.com:/xxx/xxx.git'
        checkout scm
        jobDsl(removedJobAction: 'DISABLE', removedViewAction: 'DELETE', targets: 'jobs/*.groovy', unstableOnDeprecation: true)
      }
    }
  }

The DSL code that is failing is:

hudson.FilePath workspace = hudson.model.Executor.currentExecutor().getCurrentWorkspace()

With the error:

Processing DSL script pipeline.groovy
java.lang.NullPointerException: Cannot invoke method getCurrentWorkspace() on null object
    at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:48)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
    at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:35)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
    at pipeline.run(pipeline.groovy:1)
    at pipeline$run.call(Unknown Source)

Variables created in the pipeline area are not accessible inside the job DSL step

Answer 1

This can be achieved by using SEED_JOB variable:

 String workspacePath = SEED_JOB.lastBuild.checkouts[0].workspace

It is described in project's wiki:

Access to the seed job is available through the SEED_JOB variable. The variable contains a reference to the internal Jenkins object that represents the seed job. The actual type of the object depends on the type of job that runs the DSL. For a freestyle project, the object is an instance of hudson.model.FreeStyleProject. See the Jenkins API Documentation for details.

The SEED_JOB variable is only available in scripts, not in any classes used by a script. And it is only available when running in Jenkins, e.g. in the "Process Job DSLs" build step.

The following example show how to apply the same quiet period for a generated job as for the seed job.

job('example') { quietPeriod(SEED_JOB.quietPeriod) }