agarthetiger

node{
    timestamps{
        stage('Samples'){
            
            // Single quotes with no interpolation, at least not in Jenkins. 
            // The dollar variable will be evaluated before being run by the 
            // shell command, so variables which Jenkins makes available as 
            // environment variables can still be accessed from within a 
            // single-quoted string, passed to the sh task.
            sh 'echo $PATH'

agarthetiger

// I wrote a Jenkinsfile shared library method to check job parameters for mandatory fields. The 
// list of mandatory fields depended on other parameter values. Writing this as a reference because 
// it wasn't immediately obvious how to use a (groovy) variable to access an env variable.

properties([
    parameters([
        string(name: 'MY_PARAM', defaultValue: '1.0.0', description: 'Useful description here.'),
    ])
])

agarthetiger

version: v1.0
name: Commands in Semaphore
agent:
  machine:
    type: e1-standard-2
    os_image: ubuntu2004

queue:
  processing: parallel