Version Number Plugin in Jenkins declarative pipeline - jenkins

Question

I'm trying to use version number plugin to format a version number for our
packages.
From some reason the placement for the version variable doesn't work
and when I echo the following I only get the build number, for instance: "...54"
def Version_Major = '1'
def Version_Minor = '0'
def Version_Patch = '0'
pipeline {
environment {
VERSION = VersionNumber([
versionNumberString: '${Version_Major}.${Version_Minor}.${Version_Patch}.${BUILD_NUMBER}',
worstResultForIncrement: 'SUCCESS'
]);
}
stage ('Restore packages'){
steps {
script{
echo "${VERSION}"
}
}
}
}
Edit: It does look like an issue with the plugin usage since this works:
properties([
parameters([
string(name: 'Version_Major', defaultValue: '1', description: 'Version Major'),
string(name: 'Version_Minor', defaultValue: '0', description: 'Version Minor'),
string(name: 'Version_Patch', defaultValue: '0', description: 'Version Patch')
])
])
pipeline {
agent any
environment {
VERSION = "${params.Version_Major}.${params.Version_Minor}.${params.Version_Patch}.${BUILD_NUMBER}"
}
stages{
stage ('Test'){
steps {
echo "${VERSION}"
}
}
}
}

Answer 1

You must define the variables inside the pipeline.
Try this:
pipeline {
environment {
Version_Major = '1'
Version_Minor = '0'
Version_Patch = '0'
VERSION = VersionNumber([
versionNumberString: '${Version_Major}.${Version_Minor}.${Version_Patch}.${BUILD_NUMBER}',
worstResultForIncrement: 'SUCCESS'
]);
}
stage ('Restore packages'){
steps {
script{
echo "${VERSION}"
}
}
}
}
If you need to use a parameter instead that's also possible via:
parameters {
string(name: 'PERSON', defaultValue: 'Mr Jenkins', description: 'Who should I say hello to?')
}
usage:
"Hello ${params.PERSON}"