PowerShell module interactive testing

client.ps1

$namedPipeName = 'dceb7903-d338-4207-938b-f5a1384dcfe8PuppetPsHost'
$client = New-Object System.IO.Pipes.NamedPipeClientStream($namedPipeName)
$client.Connect()

$code = @"
  `$params = @{	
    Code = @'	
	  Start-Process powershell.exe
      if (schtasks /query /fo csv 2> $null | ConvertFrom-Csv | Where-Object { $_.TaskName -eq "\wm\DSC\DSC Fact Collector" }) { exit 0;} else { exit 1; }	
'@	
    TimeoutMilliseconds = 300000	
    WorkingDirectory = "C:\Windows\System32\WindowsPowerShell\v1.0"	
  }	

  Invoke-PowerShellUserCode @params
"@

$bytes = [System.Text.Encoding]::UTF8.GetBytes($code)

# send "execute"
$client.WriteByte(1)

# send length of code
$lengthBytes = [BitConverter]::GetBytes($bytes.Length)
$client.Write($lengthBytes, 0, $lengthBytes.Length)

# and actual code
$client.Write($bytes, 0, $bytes.Length)

#place to hold the bytes
$result = New-Object Byte[] 16384

# read length and response
$client.Read($result, 0, 16384)
$client.Read($result, 0, 16384)

#### ways to stop server from running

# ask PS to exit
$code = 'exit'
$bytes = [System.Text.Encoding]::UTF8.GetBytes($code)
# send "execute" command / length of 'exit' / 'exit' command
$client.WriteByte(1)
$lengthBytes = [BitConverter]::GetBytes($bytes.Length)
$client.Write($lengthBytes, 0, $lengthBytes.Length)
$client.Write($bytes, 0, $bytes.Length)

client.rb

require 'open3'
named_pipe_name = 'dceb7903-d338-4207-938b-f5a1384dcfe8PuppetPsHost'
pipe_path = "\\\\.\\pipe\\#{named_pipe_name}"
pipe = File.open(pipe_path, 'r+b')

code =<<-END
$params = @{	
  Code = @'	
      Start-Process powershell.exe
      if (schtasks /query /fo csv 2> $null | ConvertFrom-Csv | Where-Object { $_.TaskName -eq "\\wm\\DSC\\DSC Fact Collector" }) { exit 0;} else { exit 1; }	
'@	
  TimeoutMilliseconds = 300000	
  WorkingDirectory = "C:\\Windows\\System32\\WindowsPowerShell\\v1.0"	
}	

Invoke-PowerShellUserCode @params
END

def pipe_data(data)
  msg = data.encode(Encoding::UTF_8)
  # https://ruby-doc.org/core-1.9.3/Array.html#method-i-pack
  [msg.bytes.length].pack('V') + msg.force_encoding(Encoding::BINARY)
end

# send "execute"
pipe.syswrite("\x01")
pipe.flush()
# length + command
pipe.syswrite(pipe_data(code))

# read 32-bit length, then bytes of response
l = pipe.readpartial(16384)
l = pipe.readpartial(16384)


#### ways to stop server from running


# ask server to exit
pipe.syswrite("\x00")
pipe.flush()

# close pipe interactively
pipe.close()


# use an at_exit handler so when Ruby process exits
at_exit
{
  pipe.close()
}

server.cmd

REM assuming c:\init.ps1 is the file from:
REM https://github.com/puppetlabs/puppetlabs-powershell/blob/master/lib/puppet_x/templates/init_ps.ps1

powershell.exe -NoProfile -NonInteractive -NoLogo -ExecutionPolicy Bypass -File "C:\init.ps1" "dceb7903-d338-4207-938b-f5a1384dcfe8PuppetPsHost" -EmitDebugOutput