add new event type BuildCanceled

src/StructuredLogger/BinaryLogger/BinaryLogRecordKind.cs

@@ -36,5 +36,6 @@ public enum BinaryLogRecordKind
         BuildCheckTracing,
         BuildCheckAcquisition,
         BuildSubmissionStarted,
+        BuildCanceled,
     }
 }

src/StructuredLogger/BinaryLogger/BinaryLogger.cs

@@ -76,14 +76,16 @@ public sealed class BinaryLogger : ILogger
         // version 23:
         //    - new record kinds: BuildCheckMessageEvent, BuildCheckWarningEvent, BuildCheckErrorEvent,
         //    BuildCheckTracingEvent, BuildCheckAcquisitionEvent, BuildSubmissionStartedEvent
+        // version 24:
+        //    - new record kind: BuildCanceledEvent
 
         // This should be never changed.
         // The minimum version of the binary log reader that can read log of above version.
         internal const int ForwardCompatibilityMinimalVersion = 18;
 
         // The current version of the binary log representation.
         // Changes with each update of the binary log format.
-        internal const int FileFormatVersion = 23;
+        internal const int FileFormatVersion = 24;
         // The minimum version of the binary log reader that can read log of above version.
         // This should be changed only when the binary log format is changed in a way that would prevent it from being
         // read by older readers. (changing of the individual BuildEventArgs or adding new is fine - as reader can

src/StructuredLogger/BinaryLogger/BuildCanceledEventArgs.cs

@@ -0,0 +1,45 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.IO;
+
+namespace StructuredLogger.BinaryLogger
+{
+    /// <summary>
+    /// This class represents the event arguments for build canceled events.
+    /// </summary>
+    internal sealed class BuildCanceledEventArgs : Microsoft.Build.Framework.BuildStatusEventArgs
+    {
+
+        /// <summary>
+        /// Constructor which allows the timestamp to be set.
+        /// </summary>
+        /// <param name="message">text message</param>
+        /// <param name="eventTimestamp">Timestamp when the event was created</param>
+        public BuildCanceledEventArgs(
+            string message,
+            DateTime eventTimestamp)
+            : this(message, eventTimestamp, null)
+        {
+        }
+
+        /// <summary>
+        /// Constructor which allows the timestamp to be set.
+        /// </summary>
+        /// <param name="message">text message</param>
+        /// <param name="eventTimestamp">Timestamp when the event was created</param>
+        /// <param name="messageArgs">message arguments</param>
+        public BuildCanceledEventArgs(
+            string message,
+            DateTime eventTimestamp,
+            params object[]? messageArgs)
+            : base(message, null, "MSBuild", eventTimestamp, messageArgs)
+        {
+            if (string.IsNullOrWhiteSpace(message))
+            {
+                throw new ArgumentException("Message cannot be null or consist only white-space characters.");
+            }
+        }
+    }
+}

src/StructuredLogger/BinaryLogger/BuildEventArgsReader.cs

@@ -338,6 +338,7 @@ void HandleError(FormatErrorMessage msgFactory, bool noThrow, ReaderErrorType re
                 BinaryLogRecordKind.BuildCheckTracing => ReadBuildCheckTracingEventArgs(),
                 BinaryLogRecordKind.BuildCheckAcquisition => ReadBuildCheckAcquisitionEventArgs(),
                 BinaryLogRecordKind.BuildSubmissionStarted => ReadBuildSubmissionStartedEventArgs(),
+                BinaryLogRecordKind.BuildCanceled => ReadBuildCanceledEventArgs(),
                 _ => null,
 
             };
@@ -711,6 +712,15 @@ private BuildEventArgs ReadBuildFinishedEventArgs()
             SetCommonFields(e, fields);
             return e;
         }
+        private BuildEventArgs ReadBuildCanceledEventArgs()
+        {
+            var fields = ReadBuildEventArgsFields();
+            var e = new BuildCanceledEventArgs(
+                fields.Message,
+                fields.Timestamp);
+            SetCommonFields(e, fields);
+            return e;
+        }
 
         private BuildEventArgs ReadProjectEvaluationStartedEventArgs()
         {
@@ -1287,7 +1297,7 @@ private BuildEventArgs ReadBuildCheckAcquisitionEventArgs()
         private BuildEventArgs ReadBuildSubmissionStartedEventArgs()
         {
             var fields = ReadBuildEventArgsFields(readImportance: false);
-            var e = new BuildSubmissionStartedEvent();
+            var e = new BuildSubmissionStartedEventArgs();
 
             var globalProperties = ReadStringDictionary();
             var entries = ReadStringList();

src/StructuredLogger/BinaryLogger/BuildEventArgsWriter.cs

@@ -183,6 +183,7 @@ Base types and inheritance ("EventArgs" suffix omitted):
                     ProjectFinished
                     BuildStarted
                     BuildFinished
+                    BuildCanceled
                     ProjectEvaluationStarted
                     ProjectEvaluationFinished
                 BuildError
@@ -211,7 +212,8 @@ private BinaryLogRecordKind WriteCore(BuildEventArgs e)
                 case ProjectFinishedEventArgs projectFinished: return Write(projectFinished);
                 case BuildStartedEventArgs buildStarted: return Write(buildStarted);
                 case BuildFinishedEventArgs buildFinished: return Write(buildFinished);
-                case BuildSubmissionStartedEvent buildSubmissionStarted: return Write(buildSubmissionStarted);
+                case BuildCanceledEventArgs buildCanceled: return Write(buildCanceled);
+                case BuildSubmissionStartedEventArgs buildSubmissionStarted: return Write(buildSubmissionStarted);
                 case ProjectEvaluationStartedEventArgs projectEvaluationStarted: return Write(projectEvaluationStarted);
                 case ProjectEvaluationFinishedEventArgs projectEvaluationFinished: return Write(projectEvaluationFinished);
                 case BuildCheckTracingEventArgs buildCheckTracing: return Write(buildCheckTracing);
@@ -311,6 +313,12 @@ private BinaryLogRecordKind Write(BuildFinishedEventArgs e)
             return BinaryLogRecordKind.BuildFinished;
         }
 
+        private BinaryLogRecordKind Write(BuildCanceledEventArgs e)
+        {
+            WriteBuildEventArgsFields(e);
+            return BinaryLogRecordKind.BuildCanceled;
+        }
+
         private BinaryLogRecordKind Write(ProjectEvaluationStartedEventArgs e)
         {
             WriteBuildEventArgsFields(e, writeMessage: false);
@@ -336,7 +344,7 @@ private BinaryLogRecordKind Write(BuildCheckAcquisitionEventArgs e)
             return BinaryLogRecordKind.BuildCheckAcquisition;
         }
 
-        private BinaryLogRecordKind Write(BuildSubmissionStartedEvent e)
+        private BinaryLogRecordKind Write(BuildSubmissionStartedEventArgs e)
         {
             WriteBuildEventArgsFields(e, writeMessage: false);
             Write(e.GlobalProperties);

src/StructuredLogger/BinaryLogger/BuildSubmissionStartedEvent.cs → src/StructuredLogger/BinaryLogger/BuildSubmissionStartedEventArgs.cs

@@ -4,7 +4,7 @@
 
 namespace StructuredLogger.BinaryLogger
 {
-    internal class BuildSubmissionStartedEvent()
+    internal class BuildSubmissionStartedEventArgs()
         : BuildStatusEventArgs(message: "", helpKeyword: null, senderName: null, eventTimestamp: DateTime.UtcNow)
     {
         public IDictionary<string, string?> GlobalProperties { get; set; }

src/StructuredLogger/Construction/Construction.cs

@@ -8,6 +8,7 @@
 using Microsoft.Build.Collections;
 using Microsoft.Build.Framework;
 using Microsoft.Build.Framework.Profiler;
+using StructuredLogger.BinaryLogger;
 
 namespace Microsoft.Build.Logging.StructuredLogger
 {
@@ -512,7 +513,17 @@ public void StatusEventRaised(object sender, BuildStatusEventArgs e)
             {
                 lock (syncLock)
                 {
-                    if (e is ProjectEvaluationStartedEventArgs projectEvaluationStarted)
+                    // If the build was canceled we want to show a message in the build log view.
+                    if (e is BuildCanceledEventArgs buildCanceledEventArgs)
+                    {
+                        messageProcessor.Process(new BuildMessageEventArgs(
+                             Intern(buildCanceledEventArgs.Message),
+                        Intern(buildCanceledEventArgs.HelpKeyword),
+                        Intern(buildCanceledEventArgs.SenderName),
+                        MessageImportance.High,
+                        buildCanceledEventArgs.Timestamp));
+                    }
+                    else if (e is ProjectEvaluationStartedEventArgs projectEvaluationStarted)
                     {
                         var evaluationId = projectEvaluationStarted.BuildEventContext.EvaluationId;
                         var projectFilePath = Intern(projectEvaluationStarted.ProjectFile);