How to choose which Powershell version Jenkins should use? - powershell

Question

I am using this Powershell plugin for my Jenkins build server. As you can see, one of the recent updates allows for selection of a Powershell version:
The version I have running on my server is 1.7. The problem arises when I try to actually change the version of Powershell, since the example given uses a scripted pipeline, whereas my project uses a declarative one, so the built-in option for version selection is missing. How can I force Jenkins to use Powershell 7.2 instead of the default 5.*?
The only solution I can think of is using Powershell 5 to start Powershell 7 and to then run my .ps1 script like that, but that seems stupid.

Answer 1

In both declarative and scripted pipeline you can use the pwsh step to run a script in PS 7.x.
Declarative:
pipeline {
agent any
stages {
stage('Test') {
steps {
pwsh '''
Write-Host "foo"
'''
}
}
}
}
Scripted:
node {
pwsh '''
Write-Host "foo"
'''
}

Answer 2

You can make it conditional. This script re-launches itself with version 7.2 only if the version is greater than 5.0.
if ($PSVersionTable.PSVersion -gt [Version]"5.0") {
powershell -Version 7.2 -File $MyInvocation.MyCommand.Definition
exit
}
'run some code'
Read-Host -Prompt "Scripts Completed : Press any key to exit"

Answer 3

This worked for me:
install the latest powershell-plugin for Jenkins
find the file ".\Jenkins\hudson.plugins.powershell.PowerShellInstallation.xml"
replace "powershell.exe" by "pwsh.exe" (see example below) -- providing a full path may also work
restart Jenkins
<hudson.plugins.powershell.PowerShellInstallation>
<name>DefaultWindows</name>
<home>powershell.exe</home>
<properties/>