Param($PackageDir)
if ($PSBoundParameters.Count -ne 1)  { Write-Output "Error: -PackageDir <path>" ;exit 1}
If ( -not (Test-Path $packagedir)) { Write-Output "Error: -PackageDir <path> does not exist." ;exit 1}

$packages = (Get-ChildItem -Path $packagedir| where {$_.extension -eq ".msi"} | Sort Name | %{$_.FullName})

$success = $true
if ($packages.Count -gt 0){
  Write-Output "Installation of updates (msi) is starting... "
  foreach ($package in $packages){
    Start-Process msiexec.exe -Wait -ArgumentList "/i $package /qn"
    if (!($LASTEXITCODE -eq 0)) {
      $success = $false
      $package = "+ " + (Get-Item $package).Name + ": Failed"  
    } else {
      $package = "+ " + (Get-Item $package).Name  + ": Success"
    }
    Write-Output $package
  }
  Write-Output "Finished installing updates."
  if ($success) {
    Write-Output "Info: All updates were successfully installed."
  } else {
    Write-Output "Info: There are failed updates."
  }
} else {
  Write-Output "There are no app updates (msi)."
}

$packages = (Get-ChildItem -Path $packagedir| where {$_.extension -eq ".exe"} | Sort Name | %{$_.FullName})

$success = $true
if ($packages.Count -gt 0){
  Write-Output "Installation of updates (exe) is starting... "
  foreach ($package in $packages){
    Copy-Item $package -Destination "$env:TEMP\myinstaller.exe" -Force
    Start-Process "$env:TEMP\myinstaller.exe" -Wait -ArgumentList "/silent /install"
    if (!($LASTEXITCODE -eq 0)) {
      $success = $false
      $package = "+ " + (Get-Item $package).Name + ": Failed"  
    } else {
      $package = "+ " + (Get-Item $package).Name  + ": Success"
    }
  }
  Write-Output "Finished installing updates."
  if ($success) {
    Write-Output "Info: All updates were successfully installed."
  } else {
    Write-Output "Info: All updates were successfully installed."
  }
} else {
  Write-Output "There are no app updates (exe)."
}
exit 0