Is it possible to update a variable in a dynamically created stage?

[Eric Boehm]

I am having a problem updating a variable based on the result of a shell script when I create stages dynamically. I think that this is because the dynamically created stage is a closure and its view of the variable is as of the time of the closure.

Is there a way to solve this problem?

Here's the sample Jenkinsfile if the stages are run sequentially and not created dynamically.

It behaves as expected.

node {

    label 'master'

    def needsBuild = []

    myexit = 0

    myscript = """

    echo "Desired exit $myexit"

    exit $myexit

    """

    stage("Status $myexit") {

        status = sh script: myscript, returnStatus: true

        if (status) {

            echo "Changes needed"

            needsBuild.add(myexit)

        }

    }

    myexit = 1

    myscript = """

    echo "Desired exit $myexit"

    exit $myexit

    """

    stage("Status $myexit") {

        status = sh script: myscript, returnStatus: true

        if (status) {

            echo "Changes needed"

            needsBuild.add(myexit)

        }

    }

}

This Jenkinsfile has a traceback when it tries 'needsBuild.add(myexit)

  def createStage(mystatus) {
    def myexit = mystatus
    def myscript = """
    echo "Desired exit $myexit"
    exit $myexit
    """
    return {
        stage("job $myexit") {
            status = sh script: myscript, returnStatus: true
            if (status) {
                echo "Changes needed"
                needsBuild.add(myexit)
            }
        }
    }
}
node {
    label 'master'
    def needsBuild = []
    def stages = [:]
    for (index in [0, 1]) {
        stages["Exit value $index"] = createStage(index)
    }
    parallel stages
}  

Here's the traceback:

+ exit 1
[Pipeline] echo
Changes needed
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
groovy.lang.MissingPropertyException: No such property: needsBuild for class: groovy.lang.Binding
	at groovy.lang.Binding.getVariable(Binding.java:63)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onGetProperty(SandboxInterceptor.java:271)

Any suggestions or guidance on what I am missing would be appreciated.

--

Eric Boehm

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