PowerShell: Get Executable Version and File Location

# Quick method to obtain computernames of all nodes in a cluster and adjoin result with standalone machine names
$standaloneFileServers="komputer1","komputer2"
$sourceClusters="cluster1","cluster2"
$nodes=$sourceClusters|%{get-clusternode -cluster $_}
$computerNames=$nodes.Name+$standaloneFileServers

# function to obtain the version of a particular excecutable

function getExecutableVersion{
	param(
		[string]$computername,
		[string]$executablename="robocopy.exe"
		)
    $localComputerName=$env:computername
    $isLocal=if($computername -match "(localhost|127.0.0.1|$localComputerName)"){$true}else{$false}
	
    function getExeInfo{
        param($exeName)
        $exeFile=$(try{get-command $exeName -ea SilentlyContinue}catch{}).Definition;
        $exeInfo=$(try{get-item $exeFile -ea SilentlyContinue}catch{}).versionInfo;
        $osName=(Get-WmiObject -class Win32_OperatingSystem).Caption;
        $osArchitecture=$ENV:PROCESSOR_ARCHITECTURE
        $exeInfo | Add-Member -MemberType NoteProperty -Name "osName" -Value $osName
        $exeInfo | Add-Member -MemberType NoteProperty -Name "osArchitecture" -Value $osArchitecture
        return $exeInfo;
        }

    if ($isLocal){
        $exeInfo=getExeInfo -exeName $executablename;
        }else{
            $exeInfo=invoke-command -computername $computername -scriptblock{
		        param($importedFunc,$executablename)                
                [ScriptBlock]::Create($importedFunc).Invoke($executablename);
                } -args ${function:getExeInfo},$executablename
            }
    if ($exeInfo){
        $exeVersion=$exeInfo.ProductVersion;
        $exeLocation=$exeInfo.FileName;
        $fileVersion=$exeInfo.FileVersion;
        $osName=$exeInfo.osName;
        $osArchitecture=$exeInfo.osArchitecture;
	    return "$computername`: $osName $osArchitecture $executablename $exeVersion$(if($exeVersion -ne $fileVersion){" $fileVersion "})$exeLocation";
        }else{
            write-host "$executablename is not in the environmental paths of $computername";
            }
}

$computerNames|getExecutableVersion -computerName $_ -executablename robocopy.exe