add profile.ps1 for powershell

profile.ps1

@@ -0,0 +1,26 @@
+Set-PSReadlineKeyHandler -Key Tab -Function Complete
+
+function prompt {
+
+    #depending on elevated permissions change the delimiter
+    $identity = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
+    if($identity.IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
+        $delimiter = '#'
+    } else {
+        $delimiter = '$'
+    }
+
+    #shorten path with tilde if possible
+    #uses .Replace() to prevent regex
+    $cwd = (Get-Location).Path.Replace($HOME,'~')
+
+    '[{0}@{1} {2}]{3} ' -f $env:USERNAME.ToLower(),$env:COMPUTERNAME.ToLower(),$cwd,$delimiter
+}
+
+
+
+#check for old version
+$version = ([String]$PSVersionTable.PSVersion).Substring(0,1)
+if($version -lt 7) {
+    Write-Host -ForegroundColor Red 'start pwsh instead of powershell'
+}