Use cmd-based redirection in scratch runner

scripts/run-clean-scratch-iterations.ps1

@@ -78,6 +78,8 @@ function Invoke-External {
     )
 
     Push-Location $WorkingDirectory
+    $stdoutPath = New-LogCapturePath -Suffix '.stdout.log'
+    $stderrPath = New-LogCapturePath -Suffix '.stderr.log'
     try {
         $resolvedFilePath = $FilePath
         if (Test-Path $FilePath) {
@@ -93,76 +95,44 @@ function Invoke-External {
             $startArgumentList = @('-NoLogo', '-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', $resolvedFilePath) + @($ArgumentList)
         }
 
-        $startInfo = [System.Diagnostics.ProcessStartInfo]::new()
-        $startInfo.FileName = $startFilePath
-        $startInfo.Arguments = (($startArgumentList | ForEach-Object { Format-ProcessArgument -Value ([string]$_) }) -join ' ')
-        $startInfo.WorkingDirectory = $WorkingDirectory
-        $startInfo.UseShellExecute = $false
-        $startInfo.RedirectStandardOutput = $true
-        $startInfo.RedirectStandardError = $true
+        $commandLine = (@((Format-ProcessArgument -Value $startFilePath)) + @($startArgumentList | ForEach-Object { Format-ProcessArgument -Value ([string]$_) })) -join ' '
+        $redirectedCommand = '{0} 1>{1} 2>{2}' -f $commandLine, (Format-ProcessArgument -Value $stdoutPath), (Format-ProcessArgument -Value $stderrPath)
+        $cmdPath = (Get-Command cmd.exe -ErrorAction Stop).Source
+        $cmdArguments = @('/d', '/s', '/c', $redirectedCommand)
 
-        $process = [System.Diagnostics.Process]::new()
-        $process.StartInfo = $startInfo
+        $process = Start-Process `
+            -FilePath $cmdPath `
+            -ArgumentList $cmdArguments `
+            -WorkingDirectory $WorkingDirectory `
+            -PassThru
 
-        $stdoutQueue = [System.Collections.Concurrent.ConcurrentQueue[string]]::new()
-        $stderrQueue = [System.Collections.Concurrent.ConcurrentQueue[string]]::new()
+        $stdoutIndex = 0
+        $stderrIndex = 0
 
-        $stdoutHandler = [System.Diagnostics.DataReceivedEventHandler]{
-            param($sender, $eventArgs)
-            if ($null -ne $eventArgs.Data) {
-                $stdoutQueue.Enqueue($eventArgs.Data)
-            }
-        }
-
-        $stderrHandler = [System.Diagnostics.DataReceivedEventHandler]{
-            param($sender, $eventArgs)
-            if ($null -ne $eventArgs.Data) {
-                $stderrQueue.Enqueue($eventArgs.Data)
-            }
-        }
-
-        $process.add_OutputDataReceived($stdoutHandler)
-        $process.add_ErrorDataReceived($stderrHandler)
-
-        if (-not $process.Start()) {
-            throw "Failed to start process: $resolvedFilePath"
-        }
-
-        $process.BeginOutputReadLine()
-        $process.BeginErrorReadLine()
-
-        $dequeuedLine = $null
         while (-not $process.HasExited) {
-            while ($stdoutQueue.TryDequeue([ref]$dequeuedLine)) {
-                $dequeuedLine | Out-Host
-                $dequeuedLine = $null
-            }
-
-            while ($stderrQueue.TryDequeue([ref]$dequeuedLine)) {
-                $dequeuedLine | Out-Host
-                $dequeuedLine = $null
-            }
-
+            Write-LogCaptureDelta -Path $stdoutPath -LineIndex ([ref]$stdoutIndex)
+            Write-LogCaptureDelta -Path $stderrPath -LineIndex ([ref]$stderrIndex)
             Start-Sleep -Milliseconds 500
+            $process.Refresh()
         }
 
         $process.WaitForExit()
+        $process.Refresh()
 
-        while ($stdoutQueue.TryDequeue([ref]$dequeuedLine)) {
-            $dequeuedLine | Out-Host
-            $dequeuedLine = $null
-        }
-
-        while ($stderrQueue.TryDequeue([ref]$dequeuedLine)) {
-            $dequeuedLine | Out-Host
-            $dequeuedLine = $null
-        }
+        Write-LogCaptureDelta -Path $stdoutPath -LineIndex ([ref]$stdoutIndex)
+        Write-LogCaptureDelta -Path $stderrPath -LineIndex ([ref]$stderrIndex)
 
         if ($process.ExitCode -ne 0) {
             throw "Command failed: $resolvedFilePath $($ArgumentList -join ' ')"
         }
     }
     finally {
+        foreach ($capturePath in @($stdoutPath, $stderrPath)) {
+            if (Test-Path $capturePath) {
+                Remove-Item $capturePath -Force -ErrorAction SilentlyContinue
+            }
+        }
+
         Pop-Location
     }
 }