Calling function from remote script block

Question

My powershell script is as below. I try to zip a folder at remote machine. I don't want to put Zip function inside ScriptBlock because it will be used in other parts of the script.

function Zip{  
    param([string]$sourceFolder, [string]$targetFile)  
    #zipping   
}  

$backupScript = {  
    param([string]$appPath,[string]$backupFile)      
    If (Test-Path $backupFile){ Remove-Item $backupFile }  
    #do other tasks      
    $function:Zip $appPath $backupFile  
}  

Invoke-Command -ComputerName $machineName -ScriptBlock $backupScript -Args $appPath,$backupFile

In $backupScript, it is giving error in $function:Zip line:

+ $function:Zip $appPath $backupFile
+ ~~~~~~~~ Unexpected token '$appPath' in expression or statement.

Community · Accepted Answer · 2017-05-23 10:25:33Z

2

You have to refer to arguments in a scriptblock like:

$backupScript = {  
    param([string]$appPath,[string]$backupFile)      
    If (Test-Path $backupFile){ Remove-Item $backupFile }  
    #do other tasks      
    $function:Zip $args[0] $args[1]  
}  
Invoke-Command -ComputerName $machineName -ScriptBlock $backupScript -Args       $appPath,$backupFile

Also, the function will not be known by the target machine, you'll have to define it within the script-block or pass it to the machine.

Here is an example: How do I include a locally defined function when using PowerShell's Invoke-Command for remoting?

This example puts it in your perspective: PowerShell ScriptBlock and multiple functions

edited May 23, 2017 at 10:25

CommunityBot

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answered Jul 12, 2013 at 13:52

RB84

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Comments

Aaron Jensen · Accepted Answer · 2013-07-12 16:06:45Z

0

I would find some way of getting your shared functions onto your server. We have a standard share on all our servers where we deploy common code. When we run code remotely, that code can then reference and use the shared code.

answered Jul 12, 2013 at 16:06

Aaron Jensen

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