How to write Pipeline to discard old builds?

Solution 1:

As for declarative syntax, you can use the options block:

pipeline {
  options {
    buildDiscarder(logRotator(numToKeepStr: '30', artifactNumToKeepStr: '30'))
  }
  ...
}

Parameters for logRotator (from the source code):

  • daysToKeepStr: history is only kept up to this days.
  • numToKeepStr: only this number of build logs are kept.
  • artifactDaysToKeepStr: artifacts are only kept up to this days.
  • artifactNumToKeepStr: only this number of builds have their artifacts kept.

More information can be found in Cloudbees knowledge base and in the docs for options block.

Solution 2:

You can use the properties method which, nested within the BuildDiscarderProperty eventually has the key you want to set. I still don't have a solid way to look up the correct syntax of each key. After much guessing and checking:

properties([[$class: 'BuildDiscarderProperty', strategy: [$class: 'LogRotator', artifactDaysToKeepStr: '', artifactNumToKeepStr: '', daysToKeepStr: '', numToKeepStr: '10']]]);

Note that this snippet is for scripted syntax.