make the input library to lazy loaded and no longer swallow the excep…

…tion (#3382)

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/CodeModelPlugin.cs

@@ -25,16 +25,18 @@ public CodeModelPlugin(GeneratorContext context)
  {
  _instance = this;
  Configuration = context.Configuration;
- InputLibrary = new InputLibrary(Instance.Configuration.OutputDirectory);
+ _inputLibrary = new(() => new InputLibrary(Instance.Configuration.OutputDirectory));
  }
 
+ private Lazy<InputLibrary> _inputLibrary;
+
  // Extensibility points to be implemented by a plugin
  public abstract ApiTypes ApiTypes { get; }
  public abstract CodeWriterExtensionMethods CodeWriterExtensionMethods { get; }
  public abstract TypeFactory TypeFactory { get; }
  public abstract ExtensibleSnippets ExtensibleSnippets { get; }
  public abstract OutputLibrary OutputLibrary { get; }
- public InputLibrary InputLibrary { get; }
+ public InputLibrary InputLibrary => _inputLibrary.Value;
  public virtual TypeProviderWriter GetWriter(CodeWriter writer, TypeProvider provider) => new(writer, provider);
  }
 }

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/StartUp/PluginHandler.cs

@@ -14,18 +14,11 @@ public void LoadPlugin(string outputDirectory)
  using DirectoryCatalog directoryCatalog = new(AppContext.BaseDirectory);
  using (CompositionContainer container = new(directoryCatalog))
  {
- try
+ container.ComposeExportedValue(new GeneratorContext(Configuration.Load(outputDirectory)));
+ var plugin = container.GetExportedValue<CodeModelPlugin>();
+ if (plugin == null)
  {
- container.ComposeExportedValue(new GeneratorContext(Configuration.Load(outputDirectory)));
- var plugin = container.GetExportedValue<CodeModelPlugin>();
- if (plugin == null)
- {
- throw new InvalidOperationException($"Cannot find exported value in current directory {AppContext.BaseDirectory}.");
- }
- }
- catch (Exception ex)
- {
- throw new InvalidOperationException($"Failed to load client model plugin from {AppContext.BaseDirectory}.", ex);
+ throw new InvalidOperationException($"Cannot find exported value in current directory {AppContext.BaseDirectory}.");
  }
  }
  }

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/StartUp/Program.cs

@@ -40,13 +40,12 @@ private static async Task<int> Run(CommandLineOptions options, GeneratorRunner r
  {
  await runner.RunAsync(options);
  }
- catch (Exception ex)
+ catch (Exception e)
  {
- Console.Error.WriteLine($"Error: {ex.Message}: {ex.StackTrace}");
+ Console.Error.WriteLine(e.Message);
+ Console.Error.WriteLine(e.StackTrace);
  return 1;
  }
-
- Console.Error.WriteLine("Shutting Down");
  return 0;
  }
  }