extract parameters from a jenkins previous build

Question

I am working on Jenkins version 2.32.1 pipeline. I want to extract the parameters that were chosen in the previous build of my job.

In our previous Jenkins instance ( 1.627 ) we were using jenkins.model.Jenkins.instance.getItem(job).lastBuild.getBuildVariables().get(param);

For some reason this is not working in this version (I also tried disabling the sandbox).

Any pointers on how to accomplish it?

Answer 1

Simplified version of the previous script:

def build = Jenkins.get().getItems(org.jenkinsci.plugins.workflow.job.WorkflowJob).find {it.displayName == 'YOUR_JOB_NAME_HERE'}?.getLastBuild()
build.actions.find{ it instanceof ParametersAction }?.parameters.each {echo "${it.name}=${it.value}"}

Actually a little bit shorter version for those who want to get the params for the current build from the previous run and is working on new 2+ Jenkins versions.
To get 1 particular parameter:

def cls = currentBuild.getPreviousBuild().getRawBuild().actions.find{ it instanceof ParametersAction }?.parameters.find{it.name == 'cls'}?.value

Get all params respectfully:

def cls = currentBuild.getPreviousBuild().getRawBuild().actions.find{ it instanceof ParametersAction }?.parameters