restarts a Windows program if its output contains a certain text (e.g. error)

restart-on-error.ps1

Set-Location  "C:\\path\\to\\program" # Path to exe
$processName  = "lan-mouse" # Name (do not include .exe)
$argumentList = "-d" # Arguments
$timeout = 5 # Watch timeout in seconds

$logFile = "$processName-log.txt"

function Start-ProcessAndMonitor {
    Start-Process -FilePath $processName -ArgumentList $argumentList -NoNewWindow -RedirectStandardError $logFile
    Start-Sleep -Seconds 5
}

function MonitorOutput {
    $output = Get-Content -Path $logFile -Tail 10
    if ($output -match "webrtc") {
        Write-Host "Error detected, restarting $processName"
        Stop-Process -Name $processName -Force
        Start-ProcessAndMonitor
    }
}

Start-ProcessAndMonitor

while ($true) {
    Start-Sleep -Seconds $timeout
    MonitorOutput
}