How to write Pipeline to discard old builds?

Question

The groovy syntax generator is NOT working for sample step properties: Set Job Properties. I\'ve selected Discard old builds and then entered

Answer 1

If you need a programmatic way (i.e. doing this from a function, rather than using options{} pipeline syntax):

def someFunction() {
  ...
  properties([
    buildDiscarder(logRotator(numToKeepStr: '5'))
  ])
}