fixed sheepit functionality for sheepit blender 5.0 update

unified_sheepit_launcher.ps1

@@ -40,11 +40,6 @@ function Get-RemoteSheepItCommand {
 
     $safeKey = $RenderKey -replace "'", "''"
     $safeUser = $Username -replace "'", "''"
-    $userLine = if ([string]::IsNullOrWhiteSpace($Username)) {
-        ''
-    } else {
-        "    Write-Host 'Authenticating as ${safeUser} via render key.' -ForegroundColor Yellow`n"
-    }
 
     $urlLiteral = '@(' + (($SheepItJarUrls | ForEach-Object { "'$_'" }) -join ', ') + ')'
 
@@ -150,15 +145,73 @@ catch {
 function New-SheepItSessionScript {
     param(
         [object]$Worker,
-        [string]$EncodedCommand
+        [string]$RemoteCommand
     )
-
-@"
+    
+    $rawArgs = @($Worker.SSHArgs -split '\s+' | Where-Object { $_ -and $_.Trim().Length -gt 0 })
+    $sshArgsJson = if ($rawArgs) { ($rawArgs | ConvertTo-Json -Compress) } else { '[]' }
+    $targetHost = ($rawArgs | Where-Object { $_ -notmatch '^-{1,2}' } | Select-Object -Last 1)
+    $hostLiteral = if ($targetHost) { "'" + ($targetHost -replace "'", "''") + "'" } else { '$null' }
+    $portValue = $null
+    for ($i = 0; $i -lt $rawArgs.Count; $i++) {
+        if ($rawArgs[$i] -eq '-p' -and $i -lt ($rawArgs.Count - 1)) {
+            $portValue = $rawArgs[$i + 1]
+            break
+        }
+    }
+    $portLiteral = if ($portValue) { "'" + ($portValue -replace "'", "''") + "'" } else { '$null' }
+    $remoteScriptBase64 = [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($RemoteCommand))
+    
+    $scriptContent = @"
 Write-Host 'Connecting to $($Worker.Name)...' -ForegroundColor Cyan
-ssh -o ServerAliveInterval=60 -o ServerAliveCountMax=30 $($Worker.SSHArgs) `"powershell -NoLogo -NoProfile -ExecutionPolicy Bypass -EncodedCommand $EncodedCommand`"
+`$sshArgs = ConvertFrom-Json '$sshArgsJson'
+`$targetHost = $hostLiteral
+`$port = $portLiteral
+`$scriptBase64 = '$remoteScriptBase64'
+
+if (-not `$targetHost) {
+    Write-Host "Unable to determine SSH host for $($Worker.Name)." -ForegroundColor Red
+    return
+}
+
+`$localTemp = [System.IO.Path]::GetTempFileName() + '.ps1'
+`$remoteScript = [System.Text.Encoding]::Unicode.GetString([Convert]::FromBase64String(`$scriptBase64))
+Set-Content -Path `$localTemp -Value `$remoteScript -Encoding UTF8
+
+`$remoteFile = "sheepit-$([System.Guid]::NewGuid().ToString()).ps1"
+
+`$scpArgs = @('-o','ServerAliveInterval=60','-o','ServerAliveCountMax=30')
+if (`$port) {
+    `$scpArgs += '-P'
+    `$scpArgs += `$port
+}
+`$scpArgs += `$localTemp
+`$scpArgs += ("${targetHost}:`$remoteFile")
+
+Write-Host "Transferring SheepIt script to `$targetHost..." -ForegroundColor Gray
+& scp @scpArgs
+if (`$LASTEXITCODE -ne 0) {
+    Write-Host "Failed to copy script to `$targetHost." -ForegroundColor Red
+    Remove-Item `$localTemp -ErrorAction SilentlyContinue
+    return
+}
+
+`$sshBase = @('-o','ServerAliveInterval=60','-o','ServerAliveCountMax=30') + `$sshArgs
+`$execArgs = `$sshBase + @('powershell','-NoLogo','-NoProfile','-ExecutionPolicy','Bypass','-File',"`$remoteFile")
+
+Write-Host "Starting SheepIt client on `$targetHost..." -ForegroundColor Cyan
+& ssh @execArgs
+
+Write-Host "Cleaning up remote script..." -ForegroundColor Gray
+`$cleanupArgs = `$sshBase + @('powershell','-NoLogo','-NoProfile','-ExecutionPolicy','Bypass','-Command',"`$ErrorActionPreference='SilentlyContinue'; Remove-Item -LiteralPath ``"$remoteFile``" -ErrorAction SilentlyContinue")
+& ssh @cleanupArgs | Out-Null
+
+Remove-Item `$localTemp -ErrorAction SilentlyContinue
 Write-Host "`nSSH session ended." -ForegroundColor Yellow
 Read-Host "Press Enter to close"
 "@
+    
+    return $scriptContent
 }
 
 function Start-SheepItTab {
@@ -188,8 +241,7 @@ function Start-SheepItWorker {
     Initialize-SheepItCredentials
 
     $remoteCommand = Get-RemoteSheepItCommand -RenderKey $script:SheepItRenderKey -Username $script:SheepItUsername
-    $encoded = [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($remoteCommand))
-    $sessionScript = New-SheepItSessionScript -Worker $Worker -EncodedCommand $encoded
+    $sessionScript = New-SheepItSessionScript -Worker $Worker -RemoteCommand $remoteCommand
     $title = "$($Worker.Name) - SheepIt"
 
     Start-SheepItTab -Title $title -Content $sessionScript