Powershell Prompt() with Git Branch

gistfile1.txt

function prompt() {
  $host.ui.RawUI.WindowTitle = $pwd
  $p = $pwd
  if ($p -Match [regex]::Escape($HOME)) {
    $p = $p -Replace [regex]::Escape($HOME), "~"
  }

  Write-Host -NoNewline $p
  if (Test-Path -Path $pwd/.git) {
    $branch = $(git rev-parse --abbrev-ref HEAD)
    Write-Host -NoNewline " [$branch]"
  }
  return " > "
}