incrementing maven version through jenkins declarative pipeline - maven

Question

I'm trying to increment my pom version through Jenkins, but am facing many issues with the script element of the Jenkins declarative pipeline.
My goal is:
Jenkins pulls code from SCM
Run maven plugins
Increment version of application in the pom
Merge the new pom back into the SCM
I've managed to remove '-SNAPSHOT' from the version, and I've stored the version (e.g 1.0.0) in a variable within the script element of the pipeline. I am unable to then use that variable to be able tin increment it.
pipeline {
agent any
tools {
maven 'maven'
}
stages {
stage ('Git checkout branch') {
steps {
git branch: 'branch', credentialsId: '****', url: 'https://projectRepo'
}
}
stage ('Increment snapshot') {
steps {
dir('directory') {
//Remove snapshot from version in pom
sh 'mvn versions:set -DremoveSnapshot'
script {
//Get the version and assign to variable 'version'
version = '$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)'
}
//content of version can only be accessed by ${version}
sh "echo ${version}"
}
}
}
}
}
My aim is to get the version within the script tags, then perform a split like this .split("\."), then increment the last number, then, when I do a release, I'll use the maven flag to update the pom with the new version, plus add -SNAPSHOT to the end of the version

Answer 1

When you use the build-helper-maven-plugin, you can parse the version into its components:
https://www.mojohaus.org/build-helper-maven-plugin/parse-version-mojo.html
This offers not only elements like majorVersion and minorVersion, but also nextMajorVersion, nextMinorVersion etc.