[FIXED] Assign value to powershell variable within Jenkins pipeline

Issue

I came across several documents on how to run a Powershell script within Jenkins pipeline and how to capture output. However I want to use the captured output for next node powershell script. e.g.

node {
    def msg = powershell(returnStdout: true, script: 'Write-Output "PowerShell is mighty!"')
}

Now I want to use msg in the next node within Powershell script. Like if we can assign it to a powershell variable and then perform operations with that variable. Any pointers on how this can be achieved?

Solution

You can assign the powershell output to an environment variable and use that in the subsequent nodes:

node {
    env.msg = powershell(returnStdout: true, script: 'Write-Output "PowerShell is mighty!"')
}

node {
    def output = powershell(returnStdout: true, script: '''
        $message = ($env:msg).trim()
        Write-Output $message
    ''')
    println(output)
}

Notice the env prefix before variable msg. You can retrieve the variable within powershell in next node using $env: prefix followed by variable name. Don't forget to trim the variable (.trim()) within powershell to remove newline.

Answered By - Aditya Nair