How To Pass in or Set Environment Variable for Powershell script?

Question

I have a powershell script as part of Azure DevOps pipeline. I also want to run it from windows command line. How can I set them before calling them in windows? Perhaps in a cmd file? Note - these are temporary for a single execution and don't want to set windows environment variables.

I am accessing the environment variables like this in the powershell script:

$tfsAccessToken = If ($serverMode) {$env:SYSTEM_ACCESSTOKEN} else {"somethingelse"}
$tfsBuildDefinitionId = If ($serverMode) {$env:SYSTEM_DEFINITIONID} else {2}

Do you want to set in PowerShell a variable that will be available in the next CMD task (in azure devops)? — Shayki Abramczyk
– Shayki Abramczyk, Commented Jul 28, 2019 at 12:33
no, answer below is what i want to do. thanks for your response. — dan
– dan, Commented Jul 28, 2019 at 17:35

JosefZ · Accepted Answer · 2019-07-28 10:02:10Z

1

SET command:

Display, set, or remove CMD environment variables. Changes made with SET will remain only for the duration of the current CMD session.

Example.

Supposedly, the _foo environment variable isn't defined in a newly opened CMD prompt:

set _foo

Environment variable _foo not defined

powershell -nologo -noprofile -command "& {$env:_foo ; $null -eq $env:_foo}"

True

However, if defined, the _foo environment variable is visible in the child process powershell:

set "_foo=bar"
powershell -nologo -noprofile -command "& {$env:_foo ; $null -eq $env:_foo}"

bar
False

Another example (asynchronous child process powershell):

set "_foo=bar"
start "SO_57237835" powershell -noexit -nologo -noprofile -command "& {$env:_foo;$null -eq $env:_foo}"

answered Jul 28, 2019 at 10:02

JosefZ

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