title: How to parse YAML files in Jenkins pipeline using readYAML method from the Jenkins plugin Pipeline Utility Steps
body: <p>I am trying to parse YAML files in Jenkins pipeline using the readYaml method from the Jenkins plugin "Pipeline Utility Steps".</p>
  
  <p>I read on the forums that the readYml method should be called in the node block of the pipeline.</p>
  
  <p>Before tinkering with this readYml method my pipeline worked flawlessly.</p>
  
  <p>But after adding readYml to my pipeline's node block I get the following error.</p>
  
  <hr>
  
  <pre><code>org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
  WorkflowScript: 5: Expected to find someKey "someValue" @ line 5, column 14.
             node {
                  ^
  
  1 error
  
      at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
      at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1085)
      at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603)
      at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581)
      at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)
      at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)
      at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)
      at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)
      at groovy.lang.GroovyShell.parse(GroovyShell.java:700)
      at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:131)
      at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:125)
      at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:560)
      at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:521)
      at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:290)
      at hudson.model.ResourceController.execute(ResourceController.java:97)
      at hudson.model.Executor.run(Executor.java:421)
  </code></pre>
  
  <hr>
  
  <p>I won't bore you with the complete pipeline code since the issue is really after editing my node block.</p>
  
  <p>The way I call the plugins readYml method is as follows.</p>
  
  <pre><code>pipeline {
      agent {
          node {
              label 'lsrv9557.linux.rabobank.nl'
              customWorkspace '/appl/jenkins/workdir'
              datas = readYaml file: "manifest.yml"
          }
     }
  </code></pre>
  
  <p>How do I get this to work properly and get rid of the error?</p>
  
  <p>Thanks in advance.</p>