Keep Powershell history

profile.ps1

# profile folder
$profileFolder = split-path $profile

# save last 100 history items on exit; with the 'exit' command
$historyPath = Join-Path $profileFolder "ps_history.xml"

# hook powershell's exiting event and hide the registration with -supportevent.
Register-EngineEvent -SourceIdentifier powershell.exiting -SupportEvent -Action {
  Get-History -Count 100 | Export-Clixml (Join-Path $profileFolder "ps_history.xml") }

# load previous history, if it exists
if((Test-Path $historyPath)) {
  Import-Clixml $historyPath | ? { $count++; $true } | Add-History
  Write-Host -Fore Green "Loaded $count history item(s).`n"
}