Integrating Git into Powershell prompt

profile1.ps

# Function Prompt
# {
#     $PromptData="PS $($executionContext.SessionState.Path.CurrentLocation)$('>' * ($nestedPromptLevel + 1)) "
#     $host.ui.RawUI.WindowTitle=$PromptData+'-'+(Get-Date).tostring()
# }

$Global:CurrentUser = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$UserType = "User"
$CurrentUser.Groups | foreach {
    if ($_.value -eq "S-1-5-32-544") {
        $UserType = "Admin" }
    }

function prompt {
     # Fun stuff if using the standard PowerShell prompt; not useful for Console2.
     # This, and the variables above, could be commented out.
     if($UserType -eq "Admin") {
       $host.UI.RawUI.WindowTitle = "" + $(get-location) + " : Admin"
       $host.UI.RawUI.ForegroundColor = "white"
      }
     else {
       $host.ui.rawui.WindowTitle = $(get-location)
     }

     $status_string = ""
     $symbolicref = git symbolic-ref HEAD
     if($symbolicref -ne $NULL) {
         $status_string += "[" + $symbolicref.substring($symbolicref.LastIndexOf("/") +1) + "] "

         $differences = (git diff-index --name-status HEAD)
         $git_update_count = [regex]::matches($differences, "M`t").count
         $git_create_count = [regex]::matches($differences, "A`t").count
         $git_delete_count = [regex]::matches($differences, "D`t").count

         $status_string += "c:" + $git_create_count + " u:" + $git_update_count + " d:" + $git_delete_count
     }
     else {
         $status_string = "-> "
     }

     if ($status_string.StartsWith("[")) {
         Write-Host ("-> " + $(get-location) + " " + $status_string) -nonewline -foregroundcolor yellow
     }
     else {

         Write-Host ($status_string + $(get-location)) -nonewline -foregroundcolor green
     }
     return " "
  }