How to set default value Jenkins active choice parameter as a script - jenkins

Question

I have a Jenkins pipeline That has parameters defined via active choice parameter,
defining a default value is done by:
defaultValue: '',
you can put a string there or leave it empty which will give you the default result of the groovyScript.
I am trying to change the default parameter using a script so it will take the value using a groovy script.
This is the snippet of the relevant part of the pipeline:
parameters([
extendedChoice(
bindings: '',
defaultValue: '',
groovyClasspath: '',
groovyScript:"""
def proc = ["bash","-c","/usr/local/bin/aws s3 ls s3://Spark-Jenkins-Clusters/"].execute() | ["bash","-c","cut -c32-"].execute()
proc.waitForOrKill(10000)
return proc.text.tokenize()
""",
multiSelectDelimiter: ',',
name: 'Choose_Cluster',
description: 'This parameter is nice',
quoteValue: false,
saveJSONParameterToFile: false,
type: 'PT_SINGLE_SELECT',
visibleItemCount: 5
),

Answer 1

So The way to do that is to use "defaultGroovyScript",
I didn't find it in the documentation I just saw an option in the UI and tried it and luckily it worked:
This is what I finally did:
parameters([
extendedChoice(
bindings: '',
defaultGroovyScript: """
def proc = ["bash","-c","/usr/local/bin/aws s3 ls s3://Spark-Jenkins-Clusters/"].execute() | \
["bash","-c","sort"].execute() | \
["bash","-c","sed 's/PRE//g'"].execute() | \
["bash","-c","grep main"].execute() | \
["bash","-c","tail -n 1"].execute() | \
["bash","-c","tr -d '/'"].execute()
proc.waitForOrKill(10000)
return proc.text.tokenize().reverse()
""",
groovyClasspath: '',
groovyScript:"""
def proc = ["bash","-c","/usr/local/bin/aws s3 ls s3://Spark-Jenkins-Clusters/"].execute() | ["bash","-c","cut -c32-"].execute()
proc.waitForOrKill(10000)
return proc.text.tokenize()
""",
multiSelectDelimiter: ',',
name: 'Choose_Cluster',
description: 'This parameter is nice',
quoteValue: false,
saveJSONParameterToFile: false,
type: 'PT_SINGLE_SELECT',
visibleItemCount: 5
),