Jenkins nested node, how to find the first workspace

console.log

Started by user Hugh Saunders
[Pipeline] node
Running on rpc-jenkins-n02.prod.dfw1.cit.rackspace.net-9082c1d1 in /var/lib/jenkins/workspace/scratchpipeline
[Pipeline] {
[Pipeline] sh
[scratchpipeline] Running shell script
+ date
+ pwd
/var/lib/jenkins/workspace/scratchpipeline
+ ls
foo
[Pipeline] sh
[scratchpipeline] Running shell script
+ pwd
[Pipeline] node
Running on rpc-jenkins-n02.prod.dfw1.cit.rackspace.net-9082c1d1 in /var/lib/jenkins/workspace/scratchpipeline@2
[Pipeline] {
[Pipeline] sh
[scratchpipeline@2] Running shell script
+ cat foo
cat: foo: No such file or directory
[Pipeline] echo
node: Failed to find file foo
[Pipeline] ws
Running in /var/lib/jenkins/workspace/scratchpipeline@3
[Pipeline] {
[Pipeline] sh
[scratchpipeline@3] Running shell script
+ pwd
/var/lib/jenkins/workspace/scratchpipeline@3
+ ls
+ cat foo
cat: foo: No such file or directory
[Pipeline] }
[Pipeline] // ws
[Pipeline] echo
node+ws: Failed to find file foo
[Pipeline] sh
[scratchpipeline@2] Running shell script
+ cd /var/lib/jenkins/workspace/scratchpipeline
+ cat foo
Wed Mar 15 08:49:30 UTC 2017
[Pipeline] }
[Pipeline] // node
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS

pipeline.groovy

node(){
    sh "date > foo; pwd; ls"
    nwd=sh(returnStdout: true, script: "pwd")
    node(){
        try{
            sh "cat foo"
        }catch (e){
            echo "node: Failed to find file foo"
        }
        try{
            ws(nwd){
                sh "pwd; ls; cat foo"  
            }
        }catch(e){
            echo "node+ws: Failed to find file foo"
        }
        try{
            sh """#!/bin/bash -x
                cd ${nwd}
                cat foo
            """
        }catch(e){
            echo "node+cd: Failed to find file foo"
        }
    }
}