Started adding the plugin creation command

Author: darrelmiller

src/Microsoft.OpenApi.Hidi/Handlers/PluginCommanHandler.cs

@@ -0,0 +1,49 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+using System;
+using System.CommandLine.Invocation;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Microsoft.OpenApi.Hidi.Options;
+
+namespace Microsoft.OpenApi.Hidi.Handlers
+{
+    internal class PluginCommandHandler : ICommandHandler
+    {
+        public CommandOptions CommandOptions { get; }
+        public PluginCommandHandler(CommandOptions commandOptions)
+        {
+            CommandOptions = commandOptions;
+        }
+        public int Invoke(InvocationContext context)
+        {
+            return InvokeAsync(context).GetAwaiter().GetResult();
+        }
+        public async Task<int> InvokeAsync(InvocationContext context)
+        {
+            HidiOptions hidiOptions = new HidiOptions(context.ParseResult, CommandOptions);
+            CancellationToken cancellationToken = (CancellationToken)context.BindingContext.GetService(typeof(CancellationToken));
+
+            using var loggerFactory = Logger.ConfigureLogger(hidiOptions.LogLevel);
+            var logger = loggerFactory.CreateLogger<OpenApiService>();
+            try
+            {
+                await OpenApiService.PluginManifest(hidiOptions, logger, cancellationToken);
+
+                return 0;
+            }
+            catch (Exception ex)
+            {
+#if DEBUG
+                logger.LogCritical(ex, ex.Message);
+                throw; // so debug tools go straight to the source of the exception when attached
+#else
+                logger.LogCritical( ex.Message);
+                return 1;
+#endif
+            }
+        }
+    }
+}

src/Microsoft.OpenApi.Hidi/OpenApiService.cs

@@ -701,5 +701,28 @@ internal static void WriteTreeDocumentAsHtml(string sourceUrl, OpenApiDocument d
             // Write script tag to include JS library for rendering mermaid
             writer.WriteLine("</html");
         }
+
+        internal async static Task PluginManifest(HidiOptions options, ILogger<OpenApiService> logger, CancellationToken cancellationToken)
+        {
+                // If ApiManifest is provided, set the referenced OpenAPI document
+                var apiDependency = await FindApiDependency(options.FilterOptions?.FilterByApiManifest, logger, cancellationToken);
+                if (apiDependency != null) {
+                    options.OpenApi = apiDependency.ApiDescripionUrl;
+                }   
+
+                // Load OpenAPI document
+                OpenApiDocument document = await GetOpenApi(options.OpenApi, options.Csdl, options.CsdlFilter, options.SettingsConfig, options.InlineExternal, logger, cancellationToken, options.MetadataVersion);
+
+                if (options.FilterOptions != null)
+                {
+                    document = ApplyFilters(options, logger, apiDependency, null, document, cancellationToken);
+                }
+
+                // Create OpenAIPluginManifest from ApiDependency and OpenAPI document
+                
+
+                // Save OpenAI Plugin manifest and filtered OpenAI to output folder
+
+        }
     }
 }

src/Microsoft.OpenApi.Hidi/readme.md

@@ -105,3 +105,11 @@ This command accepts an OpenAPI document as an input parameter and generates a M
 **Examples:**
 
     1. hidi show -d files\People.yml -o People.md -ll trace
+
+### Plugin
+
+This command generates an OpenAI style Plugin manifest and minimal OpenAPI file based on the provided API Manifest
+
+**Examples:**
+
+    1. hidi plugin -m exampleApiManifest.yml -o mypluginfolder