Jenkins parameterized input in stage - jenkins

Question

I know how to request for the user input for the whole pipeline using parameters directive. Now i want to be able to request for the user input inside a specific stage and be able to access that value inside the stage. Here's my pipeline:
pipeline {
agent none
stages {
stage('Stage 1') {
when{
beforeAgent true
expression {
timeout (time: 30, unit: "SECONDS"){
input message: 'Should we continue?', ok: 'Yes',
parameters:[[
$class: 'ChoiceParameterDefinition',
choices: ['Stable release', 'SNAPSHOT'],
description: 'Which Version?',
name: 'version'
]]
}
return true
}
}
agent any
steps {
echo 'Checking dependencies ...'
echo "${params}"
}
}
}
}
In this pipeline I'm able to prompt the user to choose between Stable release and SNAPSHOT inside Stage 1 stage. However I'm not able to access this variable using ${params.version}. Any ideas how to solve this?

Answer 1

I managed to work around the problem and read the input chosen by user as in the following pipeline:
def version //define a global variable for the whole pipeline.
pipeline {
agent none
stages {
stage('Stage 1') {
when{
beforeAgent true
expression {
timeout (time: 30, unit: "SECONDS"){
//Assign the variable here.
version = input message: 'Should we continue?', ok: 'Yes',
parameters:[[
$class: 'ChoiceParameterDefinition',
choices: ['Stable release', 'SNAPSHOT'],
description: 'Which Version?',
name: 'v'
]]
}
return true
}
}
agent any
steps {
// And finally access it.
echo "${version}"
}
}
}
}