Search all assemblies for PSConsoleReadLine

This is sometimes necessary (especially in CI).

Co-authored-by: Andrew Schwartzmeyer <[email protected]>

Author: dkattan

src/PowerShellEditorServices/Services/PowerShellContext/Session/PSReadLinePromptContext.cs

@@ -89,21 +89,35 @@ internal static bool TryGetPSReadLineProxy(
         {
             readLineProxy = null;
             logger.LogTrace("Attempting to load PSReadLine");
-            Console.WriteLine($"Module path is {_psReadLineTestModulePath}");
             using (var pwsh = PowerShell.Create())
             {
                 pwsh.Runspace = runspace;
                 pwsh.AddCommand("Microsoft.PowerShell.Core\\Import-Module")
                     .AddParameter("Name", testing ? _psReadLineTestModulePath : _psReadLineModulePath)
                     .Invoke();
 
+                if (pwsh.HadErrors)
+                {
+                    logger.LogWarning("PSConsoleReadline type not found: {Reason}", pwsh.Streams.Error[0].ToString());
+                    return false;
+                }
+
                 var psReadLineType = Type.GetType("Microsoft.PowerShell.PSConsoleReadLine, Microsoft.PowerShell.PSReadLine2");
 
                 if (psReadLineType == null)
                 {
-                    logger.LogWarning("PSConsoleReadline type not found: {Reason}", pwsh.HadErrors ? pwsh.Streams.Error[0].ToString() : "<Unknown reason>");
-                    Console.WriteLine("Failed to GetType but no PowerShell error");
-                    return false;
+                    // NOTE: For some reason `Type.GetType(...)` can fail to find the type,
+                    // and in that case, this search through the `AppDomain` for some reason will succeed.
+                    // It's slower, but only happens when needed.
+                    logger.LogTrace("PSConsoleReadline type not found using Type.GetType(), searching all loaded assemblies...");
+                    var allAssemblies = AppDomain.CurrentDomain.GetAssemblies();
+                    var assemblies = allAssemblies.FirstOrDefault(a => a.FullName.Contains("Microsoft.PowerShell.PSReadLine2"));
+                    psReadLineType = assemblies?.ExportedTypes?.FirstOrDefault(a => a.FullName == "Microsoft.PowerShell.PSConsoleReadLine");
+                    if (psReadLineType == null)
+                    {
+                        logger.LogWarning("PSConsoleReadLine type not found anywhere!");
+                        return false;
+                    }
                 }
 
                 try