A jenkins script to clean up workspaces on slaves

gistfile1.groovy

// Check if a slave has < 10 GB of free space, wipe out workspaces if it does --skipping folders, preserving offline status

import hudson.model.*;
import hudson.util.*;
import jenkins.model.*;
import hudson.FilePath.FileCallable;
import hudson.slaves.OfflineCause;
import hudson.node_monitors.*;
def sizeLimit = 10  // GB

for (node in Jenkins.instance.nodes) {
    computer = node.toComputer()
    if (computer.getChannel() == null) continue

    rootPath = node.getRootPath()
    size = DiskSpaceMonitor.DESCRIPTOR.get(computer).size
    roundedSize = size / (1024 * 1024 * 1024) as int

    println("node: " + node.getDisplayName() + ", free space: " + roundedSize + "GB")
   
    if (roundedSize < sizeLimit) {
        prevOffline = computer.isOffline()
        if (!prevOffline) {
            computer.setTemporarilyOffline(true, new hudson.slaves.OfflineCause.ByCLI("disk cleanup"))
        }
        
        function(node, Hudson.instance.items)

        if (!prevOffline) {
            computer.setTemporarilyOffline(false, null)
        }
    }
}

def function(curentnode, items) {

  for (item in items) {
    if (item.class.canonicalName != 'com.cloudbees.hudson.plugins.folder.Folder') {
      println("----------------------------------------------------------------------------------------------------------")
      println("JOB: " + item.name)

            jobName = item.getFullDisplayName()

            if (item.isBuilding()) {
                println(".. job " + jobName + " is currently running, skipped")
                continue
            }

            println(".. Reporting on workspaces of job " + jobName)

            workspacePath = curentnode.getWorkspaceFor(item)
            if (workspacePath == null) {
                println(".... could not get workspace path")
                continue
            }

            println(".... workspace = " + workspacePath)

            customWorkspace = item.getCustomWorkspace()
            if (customWorkspace != null) {
                workspacePath = curentnode.getRootPath().child(customWorkspace)
                println(".... custom workspace = " + workspacePath)
            }

            pathAsString = workspacePath.getRemote()
            if (workspacePath.exists()) {
                workspacePath.deleteRecursive()
                //item.doDoWipeOutWorkspace()
                println(".... deleted from location : " + pathAsString )
            } else {
                println(".... nothing to delete at " + pathAsString)
            }         
      
      if (!item.isBuildable()) {
         println("This Job can't be built ...")
      }
    }
    else {
      println("===========================================================================================================")      
      println("FOLDER : " + item.name)     
      function(curentnode, ((com.cloudbees.hudson.plugins.folder.Folder) item).getItems())
    }
  }
}