Assign value to powershell variable within Jenkins pipeline

Question

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?

Aditya Nair · Accepted Answer · 2021-07-18 21:30:06Z

1

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 Jul 18, 2021 at 21:30

Aditya Nair

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