JenkinsFile default workspace name is too long - jenkins-pipeline

Question

I am currently setting up jenkins with bitbucket.
I have create a new jenkins project as multibranch project.
The JenkinsFile is hosted inside the git repository.
How can I force jenkins to generate a shorter branch name than the default one.
E:\jenkins\workspace\reposName-BrancheName-ZKIZ7BNGL6RTDKLQAQ7QR4FKZMOB3DDAVZ564BLWT2BY5ZV652VA
How can I get ride of ZKIZ7BNGL6RTDKLQAQ7QR4FKZMOB3DDAVZ564BLWT2BY5ZV652VA
This is my jenkinsFile
#!/usr/bin/env groovy
env.PATH = env.PATH + ";c:\\Windows\\System32"
def call(String label = null, Closure body) {
node(label) {
String path = pwd()
String branchName = env.BRANCH_NAME
if (branchName) {
path = path.split(Pattern.quote(File.separator))
def workspaceRoot = path[0..<-1].join(File.separator)
def currentWs = path[-1]
String newWorkspace = env.JOB_NAME.replace('/', '-')
newWorkspace = newWorkspace.replace(File.separator, '-')
newWorkspace = newWorkspace.replace('%2f', '-')
newWorkspace = newWorkspace.replace('%2F', '-')
if (currentWs =~ '#') {
newWorkspace = "${newWorkspace}#${currentWs.split('#')[-1]}"
}
path = "${workspaceRoot}${File.separator}${newWorkspace}"
}
ws(path) {
body()
}
}
}
pipeline
{
} // pipeline
Is there a way to force Jenkins to generate a shorter name?

Answer 1

You can change value of jenkins.branch.WorkspaceLocatorImpl.PATH_MAX=20 in jenkins's script console.
Changes will be lost if you restart jenkins server. To make the changes permanent, add this java property -Djenkins.branch.WorkspaceLocatorImpl.PATH_MAX=20

Answer 2

This is not the best way to fix it, but it is working :)
First create a method to get the current workspace and rework the final path like this:
def GetWorkspace()
{
node
{
String path = pwd()
String branchName = env.BRANCH_NAME
if(branchName)
{
path = path.split(Pattern.quote(File.separator))
def workspaceRoot = path[0..<-1].join(File.separator)
def currentWs = path[-1]
// Here is where we make branch names safe for directories -
// the most common bad character is '/' in 'feature/add_widget'
// which gets replaced with '%2f', so JOB_NAME will be
// ${PR}}OJECT_NAME}%2f${BRANCH_NAME}
String newWorkspace = env.JOB_NAME.replace('/', '-')
newWorkspace = newWorkspace.replace(File.separator, '-')
newWorkspace = newWorkspace.replace('%2f', '-')
newWorkspace = newWorkspace.replace('%2F', '-')
// Add on the '#n' suffix if it was there
if (currentWs =~ '#')
{
newWorkspace = "${newWorkspace}#${currentWs.split('#')[-1]}"
}
path = "E:\\Jenkins\\workspace\\${File.separator}${newWorkspace}"
}
return path
}
}
Then you have to set it up to our agent like this
pipeline {
environment {
//Your Env Setup
}
agent { //Global Agent.
node {
label 'AgentName'
customWorkspace GetWorkspace()
}
}