Jenkins dynamic declarative pipeline parameters

Question

Can the parameters in a Jenkins declarative pipeline be dynamic?

I want a the choice option values be populated at runtime by a function. The following code does gen

Answer 1

There is another solution: you can use the "properties" step before "pipeline" - there you can use the active choice plugin too:

properties([
    parameters([
        [
            $class: 'ChoiceParameter', 
            choiceType: 'PT_SINGLE_SELECT', 
            description: '', 
            filterable: false, 
            name: 'Release', 
            randomName: 'choice-parameter-21337077649621572', 
            script: [
                $class: 'GroovyScript', 
                fallbackScript: '', 
                script: '''// Find relevant AMIs based on their name
                    def sout = new StringBuffer(), serr = new StringBuffer()
                    def proc = '/usr/bin/aws --region eu-west-1 ec2 describe-images \
                            ' --owners OWNER --filter Name=name,Values=PATTERN \
                            ' --query Images[*].{AMI:Name} --output  text'.execute()
                    proc.consumeProcessOutput(sout, serr)
                    proc.waitForOrKill(10000)
                    return sout.tokenize()'''
            ]
        ]
    ])
])
pipeline {
    ...
}

The only thing is that first time you start your build, it would fail. Second time you start it it should be a "build with parameter".

Hope it helps.

Answer 2

what about user input:

def findAMIs() {
    return UUID.randomUUID().toString().split('-').join('\n')
}

node{
    def userInput = input(
        id: 'userInput', message: 'input parameters', parameters: [
            [
                $class: 'ChoiceParameterDefinition',
                name: 'ami',
                choices: findAMIs(),
                description: 'AMI',
            ],
        ]
    )

    echo ("Selected AMI :: "+userInput)
}

Answer 3

For anyone needing a declarative pipeline syntax option, I found a good solution in another question, which helped me.

This is my suggestion based on it. You should be able to generate a more dynamic list with the code that creates the ${WORKSPACE}/list file

pipeline {
    agent any
    stages {
        stage("Release scope") {
            steps {
                script {
                    // Prepare a list and write to file
                    sh "echo \"patch\nminor\nmajor\" > ${WORKSPACE}/list"

                    // Load the list into a variable
                    env.LIST = readFile (file: "${WORKSPACE}/list")

                    // Show the select input
                    env.RELEASE_SCOPE = input message: 'User input required', ok: 'Release!',
                            parameters: [choice(name: 'RELEASE_SCOPE', choices: env.LIST, description: 'What is the release scope?')]
                }
                echo "Release scope selected: ${env.RELEASE_SCOPE}"
            }
        }
    }
}

I hope this helps