Enable termination of Hidi processes through pressing the breaking key combinations

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

@@ -50,6 +50,7 @@ public async Task<int> InvokeAsync(InvocationContext context)
             string filterbyoperationids = context.ParseResult.GetValueForOption(FilterByOperationIdsOption);
             string filterbytags = context.ParseResult.GetValueForOption(FilterByTagsOption);
             string filterbycollection = context.ParseResult.GetValueForOption(FilterByCollectionOption);
+
             CancellationToken cancellationToken = (CancellationToken)context.BindingContext.GetService(typeof(CancellationToken));
 
             using var loggerFactory = Logger.ConfigureLogger(logLevel);

src/Microsoft.OpenApi.Hidi/OpenApiService.cs

@@ -102,7 +102,7 @@ CancellationToken cancellationToken
                             stream.Position = 0;
                         }
 
-                        document = await ConvertCsdlToOpenApi(stream, settingsFile);
+                        document = await ConvertCsdlToOpenApi(stream, settingsFile, cancellationToken);
                         stopwatch.Stop();
                         logger.LogTrace("{timestamp}ms: Generated OpenAPI with {paths} paths.", stopwatch.ElapsedMilliseconds, document.Paths.Count);
                     }
@@ -216,6 +216,10 @@ CancellationToken cancellationToken
                     textWriter.Flush();
                 }
             }
+            catch(TaskCanceledException)
+            {
+                Console.Error.WriteLine("CTRL+C pressed, aborting the operation.");
+            }            
             catch (Exception ex)
             {
                 throw new InvalidOperationException($"Could not transform the document, reason: {ex.Message}", ex);
@@ -324,12 +328,12 @@ internal static IConfiguration GetConfiguration(string settingsFile)
         /// </summary>
         /// <param name="csdl">The CSDL stream.</param>
         /// <returns>An OpenAPI document.</returns>
-        public static async Task<OpenApiDocument> ConvertCsdlToOpenApi(Stream csdl, string settingsFile = null)
+        public static async Task<OpenApiDocument> ConvertCsdlToOpenApi(Stream csdl, string settingsFile = null, CancellationToken token = default)
         {
             using var reader = new StreamReader(csdl);
-            var csdlText = await reader.ReadToEndAsync();
+            var csdlText = await reader.ReadToEndAsync(token);
             var edmModel = CsdlReader.Parse(XElement.Parse(csdlText).CreateReader());
-            
+
             var config = GetConfiguration(settingsFile);
             var settings = new OpenApiConvertSettings()
             {
@@ -353,9 +357,8 @@ public static async Task<OpenApiDocument> ConvertCsdlToOpenApi(Stream csdl, stri
                 EnableTypeDisambiguationForDefaultValueOfOdataTypeProperty = true
             };
             config.GetSection("OpenApiConvertSettings").Bind(settings);
-
-            OpenApiDocument document = edmModel.ConvertToOpenApi(settings);
 
+            OpenApiDocument document = edmModel.ConvertToOpenApi(settings);
             document = FixReferences(document);
 
             return document;

src/Microsoft.OpenApi.Hidi/Program.cs

@@ -1,15 +1,13 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
+using System;
 using System.CommandLine;
-using System.CommandLine.Builder;
-using System.CommandLine.Hosting;
 using System.CommandLine.Parsing;
-
+using System.Diagnostics;
 using System.IO;
+using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.OpenApi.Hidi.Handlers;
 
@@ -18,9 +16,8 @@ namespace Microsoft.OpenApi.Hidi
     static class Program
     {
         static async Task Main(string[] args)
-        {
-            var rootCommand = new RootCommand() {
-            };
+        {            
+            var rootCommand = new RootCommand() {};
 
             // command option parameters and aliases
             var descriptionOption = new Option<string>("--openapi", "Input OpenAPI description file path or URL");
@@ -120,12 +117,12 @@ static async Task Main(string[] args)
 
             rootCommand.Add(transformCommand);
             rootCommand.Add(validateCommand);
-
+            
             // Parse the incoming args and invoke the handler
             await rootCommand.InvokeAsync(args);
 
             //// Wait for logger to write messages to the console before exiting
             await Task.Delay(10);
-        }
+        }        
     }
 }

test/Microsoft.OpenApi.Hidi.Tests/Services/OpenApiServiceTests.cs

@@ -39,7 +39,7 @@ public async Task ReturnFilteredOpenApiDocBasedOnOperationIdsAndInputCsdlDocumen
             var filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "UtilityFiles\\Todo.xml");
             var fileInput = new FileInfo(filePath);
             var csdlStream = fileInput.OpenRead();
-
+            
             // Act
             var openApiDoc = await OpenApiService.ConvertCsdlToOpenApi(csdlStream);
             var predicate = OpenApiFilterService.CreatePredicate(operationIds, tags);