cancel msbuild action

src/SharpIDE.Application/Features/Build/BuildService.cs

@@ -4,6 +4,7 @@ using Microsoft.Build.Execution;
 using Microsoft.Build.Framework;
 using Microsoft.Build.Logging;
 using Microsoft.Extensions.Logging;
+using SharpIDE.Application.Features.Events;
 using SharpIDE.Application.Features.Logging;
 
 namespace SharpIDE.Application.Features.Build;
@@ -19,10 +20,14 @@ public class BuildService(ILogger<BuildService> logger)
 {
 	private readonly ILogger<BuildService> _logger = logger;
 
-	public event Func<Task> BuildStarted = () => Task.CompletedTask;
+	public EventWrapper<Task> BuildStarted { get; } = new(() => Task.CompletedTask);
+	public EventWrapper<Task> BuildFinished { get; } = new(() => Task.CompletedTask);
 	public ChannelTextWriter BuildTextWriter { get; } = new ChannelTextWriter();
+	private CancellationTokenSource? _cancellationTokenSource;
 	public async Task MsBuildAsync(string solutionOrProjectFilePath, BuildType buildType = BuildType.Build, CancellationToken cancellationToken = default)
 	{
+		if (_cancellationTokenSource is not null) throw new InvalidOperationException("A build is already in progress.");
+		_cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
 		using var _ = SharpIdeOtel.Source.StartActivity($"{nameof(BuildService)}.{nameof(MsBuildAsync)}");
 
 		var terminalLogger = InternalTerminalLoggerFactory.CreateLogger(BuildTextWriter);
@@ -50,13 +55,22 @@ public class BuildService(ILogger<BuildService> logger)
 			hostServices: null,
 			flags: BuildRequestDataFlags.None);
 
-		await BuildStarted.Invoke().ConfigureAwait(false);
+		BuildStarted.InvokeParallelFireAndForget();
 		var timer = Stopwatch.StartNew();
-		var buildResult = await BuildManager.DefaultBuildManager.BuildAsync(buildParameters, buildRequest, cancellationToken).ConfigureAwait(false);
+		var buildResult = await BuildManager.DefaultBuildManager.BuildAsync(buildParameters, buildRequest, _cancellationTokenSource.Token).ConfigureAwait(false);
 		timer.Stop();
+		BuildFinished.InvokeParallelFireAndForget();
+		_cancellationTokenSource = null;
 		_logger.LogInformation(buildResult.Exception, "Build result: {BuildResult} in {ElapsedMilliseconds}ms", buildResult.OverallResult, timer.ElapsedMilliseconds);
 	}
 
+	public async Task CancelBuildAsync()
+	{
+		if (_cancellationTokenSource is null) throw new InvalidOperationException("No build is in progress.");
+		await _cancellationTokenSource.CancelAsync();
+		_cancellationTokenSource = null;
+	}
+
 	private static string[] TargetsToBuild(BuildType buildType)
 	{
 		string[] targetsToBuild = buildType switch

src/SharpIDE.Godot/Features/Build/BuildPanel.cs

@@ -14,7 +14,7 @@ public partial class BuildPanel : Control
     public override void _Ready()
     {
         _terminal = new Terminal(GetNode<Control>("%Terminal"));
-        _buildService.BuildStarted += OnBuildStarted;
+        _buildService.BuildStarted.Subscribe(OnBuildStarted);
     }
 
     public override void _Process(double delta)

src/SharpIDE.Godot/IdeRoot.cs

@@ -28,6 +28,7 @@ public partial class IdeRoot : Control
 	private Button _rebuildSlnButton = null!;
 	private Button _cleanSlnButton = null!;
 	private Button _restoreSlnButton = null!;
+	private TextureButton _cancelMsBuildActionButton = null!;
 	private SearchWindow _searchWindow = null!;
 	private SearchAllFilesWindow _searchAllFilesWindow = null!;
 	private CodeEditorPanel _codeEditorPanel = null!;
@@ -71,6 +72,7 @@ public partial class IdeRoot : Control
 		_rebuildSlnButton = GetNode<Button>("%RebuildSlnButton");
 		_cleanSlnButton = GetNode<Button>("%CleanSlnButton");
 		_restoreSlnButton = GetNode<Button>("%RestoreSlnButton");
+		_cancelMsBuildActionButton = GetNode<TextureButton>("%CancelMsBuildActionButton");
 		_runMenuPopup = GetNode<Popup>("%RunMenuPopup");
 		_runMenuButton = GetNode<Button>("%RunMenuButton");
 		_codeEditorPanel = GetNode<CodeEditorPanel>("%CodeEditorPanel");
@@ -88,6 +90,9 @@ public partial class IdeRoot : Control
 		_rebuildSlnButton.Pressed += OnRebuildSlnButtonPressed;
 		_cleanSlnButton.Pressed += OnCleanSlnButtonPressed;
 		_restoreSlnButton.Pressed += OnRestoreSlnButtonPressed;
+		_cancelMsBuildActionButton.Pressed += async () => await _buildService.CancelBuildAsync();
+		_buildService.BuildStarted.Subscribe(async () => await this.InvokeAsync(() => _cancelMsBuildActionButton.Disabled = false));
+		_buildService.BuildFinished.Subscribe(async () => await this.InvokeAsync(() => _cancelMsBuildActionButton.Disabled = true));
 		GodotGlobalEvents.Instance.BottomPanelVisibilityChangeRequested.Subscribe(async show => await this.InvokeAsync(() => _invertedVSplitContainer.InvertedSetCollapsed(!show)));
 		GetTree().GetRoot().FocusExited += OnFocusExited;
 		_nodeReadyTcs.SetResult();

src/SharpIDE.Godot/IdeRoot.tscn

@@ -99,7 +99,8 @@ layout_mode = 2
 size_flags_vertical = 4
 text = "Restore"
 
-[node name="TextureButton" type="TextureButton" parent="VBoxContainer/Panel/HBoxContainer"]
+[node name="CancelMsBuildActionButton" type="TextureButton" parent="VBoxContainer/Panel/HBoxContainer"]
+unique_name_in_owner = true
 custom_minimum_size = Vector2(21, 18)
 layout_mode = 2
 size_flags_vertical = 4

src/SharpIDE.Photino/Components/BuildOutputDisplay.razor

@@ -11,7 +11,7 @@
 
 	protected override async Task OnInitializedAsync()
 	{
-		BuildService.BuildStarted += ClearPreviousOutput;
+		BuildService.BuildStarted.Subscribe(ClearPreviousOutput);
 		_ = Task.Run(async () =>
 		{
 			try
@@ -34,5 +34,5 @@
 		await InvokeAsync(StateHasChanged);
 	}
 
-	public void Dispose() => BuildService.BuildStarted -= ClearPreviousOutput;
+	public void Dispose() => BuildService.BuildStarted.Unsubscribe(ClearPreviousOutput);
 }