Start-Log.ps1

Function Start-Log {
    Param (
        [int]$KeepLog = 15
    )

    $Script:VerbosePreference = "Continue"
    $LogPath = Join-Path -Path (Split-Path $Script:MyInvocation.MyCommand.Path) -ChildPath "Logs"
    If (-not (Test-Path $LogPath))
    {
        Try {
            New-Item -Path $LogPath -ItemType Directory -ErrorAction Stop | Out-Null
        }
        Catch {
            Write-Error "Unable to create log folder because ""$($Error[0])"", no logging will be available for this script"
            Return
        }
    }
    $LogPathName = Join-Path -Path $LogPath -ChildPath "$($Script:MyInvocation.MyCommand.Name)-$(Get-Date -Format 'MM-dd-yyyy').log"
    Try {
        Start-Transcript $LogPathName -Append -ErrorAction Stop
        Write-Verbose "$(Get-Date): Logging for $($Script:MyInvocation.MyCommand.Name) started"
    }
    Catch {
        Write-Error "Unable to create transcript log because ""$($Error[0])"""
        Return
    }
    If (@(Get-ChildItem "$LogPath\*.log" | Where LastWriteTime -LT (Get-Date).AddDays(-$KeepLog)).Count -gt 0)
    {
        Write-Verbose "$(Get-Date): Removing old log files:"
        Get-ChildItem "$LogPath\*.log" | Where LastWriteTime -LT (Get-Date).AddDays(-$KeepLog) | Remove-Item -Confirm:$false
    }
}

Function Stop-Log {
    Write-Verbose "$(Get-Date): Logging for $($Script:MyInvocation.MyCommand.Name) completed"
    Stop-Transcript
}