Passing relative paths of scripts to powershell jobs - multithreading

Question

I have functions in separate files I need to run as jobs in one main file.
I need to be able to pass these functions arguments.
Right now my problem is figuring out how to pass the path of the function files to the jobs in a way that is not completely awful.
I need to have the functions defined at the top of the file for readability (just having a static comment that says "script uses somefunc.ps1" is not adequate)
I also need to refer to the scripts relative path (they will all be in the same folder).
Right now I am using env: to store the path of the scripts, but doing this I need to refer to the script in like 5 places!
This is what I have:
testJobsMain.ps1:
#Store path of functions in env so jobs can find them
$env:func1 = "$PSScriptRoot\func1.ps1"
$env:func2 = "$PSScriptRoot\func2.ps1"
$arrOutput = #()
$Jobs = #()
foreach($i in ('aaa','bbb','ccc') ) {
$Import = {. $env:func1}
$Execute = {func1 -myArg $Using:i}
$Jobs += Start-Job -InitializationScript $Import -ScriptBlock $Execute
}
$JobsOutput = $Jobs | Wait-Job | Receive-Job
$JobsOutput
$Jobs | Remove-Job
#Clean up env
Remove-Item env:\func1
$arrOutput
func1.ps1
function func1( $myArg ) { write-output $myArg }
func2.ps1
function func2( $blah ) { write-output $blah }

Answer 1

You can simply make array of paths, and then pass one of paths/all of them in -ArgumentList param from Start-Job:
#func1.ps1
function add($inp) {
return $inp + 1
}
#func2.ps1
function add($inp) {
return $inp + 2
}
$paths = "$PSScriptRoot\func1.ps1", "$PSScriptRoot\func2.ps1"
$i = 0
ForEach($singlePath in $paths) {
$Execute = {
Param(
[Parameter(Mandatory=$True, Position=1)]
[String]$path
)
Import-Module $path
return add 1
}
Start-Job -Name "Job$i" -ScriptBlock $Execute -ArgumentList $singlePath
$i++
}
for ($i = 0; $i -lt 2; $i++) {
Wait-Job "Job$i"
[int]$result = Receive-Job "Job$i"
}
You can skip all those $i iterators with names, Powershell will name jobs automatically, and easly predictable: Job1, Job2.. So it would make code a lot prettier.