Windows Powershell custom profile file

profile.ps1

set-alias np C:\Windows\notepad.exe
set-alias subl "C:\Program Files\Sublime Text 3\sublime_text.exe"
set-alias grep select-string

$currentPrincipal = New-Object Security.Principal.WindowsPrincipal( [Security.Principal.WindowsIdentity]::GetCurrent() )
$isAdmin = $currentPrincipal.IsInRole( [Security.Principal.WindowsBuiltInRole]::Administrator )
$host.ui.RawUI.BackgroundColor = [ConsoleColor]::Black

function prompt
{
   $host.UI.RawUI.ForegroundColor = [ConsoleColor]::Green
   $host.UI.RawUI.WindowTitle = (shorten-path (pwd).Path)
   if ($isAdmin) { $host.UI.RawUI.WindowTitle = $host.UI.RawUI.WindowTitle + " (Admin)" }
   
   # our theme
   $cdelim = [ConsoleColor]::Gray
   $chost = [ConsoleColor]::Blue
   $cloc = [ConsoleColor]::DarkYellow
   $red = [ConsoleColor]::Red
    
   write-host ''
   write-host '[' -n -f $cdelim
   write-host ([net.dns]::GetHostName()) -n -f $chost
   write-host '/' -n -f $cdelim
   write-host $env:username -n -f $chost
   write-host '] @ ' -n -f $cdelim
   write-host (get-date -format "yyyy-MM-dd HH:mm:ss") -f $cloc
   write-host '{' -n -f $cdelim
   write-host (shorten-path (pwd).Path) -n -f $cloc
   write-host '}' -f $cdelim
   if ( $isAdmin )
   {
      write-host '[ADMIN] ' -n -f $red
   }
   write-host "$([char]0x0A7) " -n -f $cloc

   return ' ' 
}

function shorten-path([string] $path) {
   $loc = $path.Replace($HOME, '~')
   # remove prefix for UNC paths
   $loc = $loc -replace '^[^:]+::', ''
   # make path shorter like tabs in Vim,
   # handle paths starting with \\ and . correctly
   return ($loc -replace '\\(\.?)([^\\])[^\\]*(?=\\)','\$1$2')
}

function Get-IisProcesses() {
  gwmi -NS 'root\WebAdministration' -class 'WorkerProcess' | select AppPoolName,ProcessId
}

# Helper Function - convert WMI date to TimeDate object 
function WMIDateStringToDate($Bootup) { 
    [System.Management.ManagementDateTimeconverter]::ToDateTime($Bootup) 
} 

function Get-Uptime() {
  $Computer = "." # adjust as needed 
  $computers = Get-WMIObject -class Win32_OperatingSystem -computer $computer 
   
  foreach ($system in $computers) { 
      $Bootup = $system.LastBootUpTime 
      $LastBootUpTime = WMIDateStringToDate($Bootup) 
      $now = Get-Date 
      $Uptime = $now - $lastBootUpTime 
      $d = $Uptime.Days 
      $h = $Uptime.Hours 
      $m = $uptime.Minutes 
      $ms= $uptime.Milliseconds 
   
      "System Up for: {0} days, {1} hours, {2}.{3} minutes" -f $d,$h,$m,$ms 
  }  
}