powershell - Get List Of Functions From Script

Question

If I have a .ps1 file with the following functions

function SomeFunction {}

function AnotherFunction {}

How can I get a list of all those functions and invoke them?

I'd like to do something like this:

$functionsFromFile = Get-ListOfFunctions -Path 'C:someScript.ps1'
foreach($function in $functionsFromFile)
{
   $function.Run() #SomeFunction and AnotherFunction execute
}

Answer 1

You could use the Get-ChildItem to retrieve all functions and store them into a variable. Then load the script into to runspace and retrieve all functions again and use the Where-Object cmdlet to filter all new functions by excluding all previously retrieved functions. Finally iterate over all new functions and invoke them:

$currentFunctions = Get-ChildItem function:
# dot source your script to load it to the current runspace
. "C:someScript.ps1"
$scriptFunctions = Get-ChildItem function: | Where-Object { $currentFunctions -notcontains $_ }

$scriptFunctions | ForEach-Object {
      & $_.ScriptBlock
}