Public/Invoke-WithVmFileServer.ps1
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function Invoke-WithVmFileServer { <# .SYNOPSIS Runs a script block with a live file server handle, guaranteeing cleanup. .DESCRIPTION Starts the file server, passes the handle to $ScriptBlock, then stops the server in a finally block regardless of whether $ScriptBlock throws. This wrapper makes it structurally impossible to forget the cleanup that Stop-VmFileServer performs (closing the HttpListener, removing the firewall rule, deleting the staging directory). Use it in preference to writing Start-VmFileServer / Stop-VmFileServer try/finally blocks directly. .PARAMETER VmIpAddress IPv4 address of any VM on the switch. Forwarded to Start-VmFileServer, which uses it to locate the host adapter IP. Mutually exclusive with -HostIp. .PARAMETER HostIp Explicit host IP. Forwarded to Start-VmFileServer. Mutually exclusive with -VmIpAddress. .PARAMETER Port TCP port for the HTTP listener. Defaults to 8745. .PARAMETER ScriptBlock Block to run while the server is live. Receives the server handle as its first argument. Any output it produces flows through to the caller. .EXAMPLE Invoke-WithVmFileServer -VmIpAddress '10.10.0.50' -ScriptBlock { param($server) $url = Add-VmFileServerFile -Server $server -LocalPath 'E:\cache\tarball.tar.gz' Invoke-VmRunnerGroup -HostBaseUrl $server.BaseUrl ... } #> [CmdletBinding()] param( [Parameter(Mandatory, ParameterSetName = 'ByVmIp')] [string] $VmIpAddress, [Parameter(Mandatory, ParameterSetName = 'ByHostIp')] [string] $HostIp, [Parameter()] [int] $Port = 8745, [Parameter(Mandatory)] [scriptblock] $ScriptBlock ) $startParams = @{ Port = $Port } if ($PSCmdlet.ParameterSetName -eq 'ByVmIp') { $startParams['VmIpAddress'] = $VmIpAddress } else { $startParams['HostIp'] = $HostIp } $server = Start-VmFileServer @startParams try { & $ScriptBlock $server } finally { Stop-VmFileServer -Server $server } } |