start-watchdog.ps1

$ErrorActionPreference = "Stop"

$Root = Split-Path -Parent $MyInvocation.MyCommand.Path
$WatchdogScript = Join-Path $Root "watch-proxy.ps1"
$WatchdogPidFile = Join-Path $Root ".watchdog.pid"
$stdout = Join-Path $Root "watchdog.stdout.log"
$stderr = Join-Path $Root "watchdog.stderr.log"

if (Test-Path $WatchdogPidFile) {
  try {
    $existingPid = [int](Get-Content -LiteralPath $WatchdogPidFile)
    if (Get-Process -Id $existingPid -ErrorAction SilentlyContinue) {
      Write-Host "watchdog already running"
      Write-Host "PID: $existingPid"
      exit 0
    }
  } catch {}
}

$powershell = (Get-Command powershell.exe).Source
$process = Start-Process `
  -FilePath $powershell `
  -ArgumentList @("-NoProfile", "-ExecutionPolicy", "Bypass", "-File", $WatchdogScript) `
  -WorkingDirectory $Root `
  -WindowStyle Hidden `
  -RedirectStandardOutput $stdout `
  -RedirectStandardError $stderr `
  -PassThru

Set-Content -LiteralPath $WatchdogPidFile -Value $process.Id -Encoding ASCII

Write-Host "watchdog started"
Write-Host "PID: $($process.Id)"