function Set-WindowTitle { $global:WindowTitleOverride = [string]::Join(" ",$args) }
Set-Alias -name "title" -value Set-WindowTitle

function Prompt
{
  # Set WindowTitle to current directory name, unless overridden with Set-WindowTitle
  $host.ui.RawUI.WindowTitle = if ($global:WindowTitleOverride) { $global:WindowTitleOverride  } else { get-location };
  if ($GitPromptScriptBlock) { & $GitPromptScriptBlock } # posh-git compatibility
  else { 'PS ' + $pwd + '> ' } # default. TODO: is it possible to chain and call the previous `Prompt` command?
}