Set-variable-in-caller-scope

How to set a variable in the caller scope

Sometimes a function should set a variable in the caller scope. The way to do this depends on how this function is defined and imported.

Functions defined in scripts may use straightforward Set-Variable -Scope 1. This way is not working in module functions.

Functions defined in modules may use less obvious $PSCmdlet.SessionState.PSVariable.Set(). This way is not working in script functions.

Scripts

• Lib.ps1 defines functions using two different ways of setting a variable.
• Test-1.script.ps1 imports (dot-sources) script functions and shows how they work.
• Test-2.module.ps1 imports module functions (SetVariable.psm1) and shows how they work.