public async ValueTask ProcessAsync(DotNetWatchContext context, CancellationToken cancellationToken) { while (!cancellationToken.IsCancellationRequested) { var arguments = context.Iteration == 0 || (context.ChangedFile?.FilePath is string changedFile && changedFile.EndsWith(".csproj", StringComparison.OrdinalIgnoreCase)) ? new[] { "msbuild", "/t:Build", "/restore", "/nologo" } : new[] { "msbuild", "/t:Build", "/nologo" }; var processSpec = new ProcessSpec { Executable = _muxer, Arguments = arguments, WorkingDirectory = context.ProcessSpec.WorkingDirectory, }; _reporter.Output("Building..."); var exitCode = await _processRunner.RunAsync(processSpec, cancellationToken); context.FileSet = await _fileSetFactory.CreateAsync(cancellationToken); if (exitCode == 0) { return; } // If the build fails, we'll retry until we have a successful build. using var fileSetWatcher = new FileSetWatcher(context.FileSet, _reporter); await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _reporter.Warn("Waiting for a file to change before restarting dotnet...")); } }
public async ValueTask ProcessAsync(DotNetWatchContext context, CancellationToken cancellationToken) { using var fileSetWatcher = new FileSetWatcher(context.FileSet, _reporter); while (!cancellationToken.IsCancellationRequested) { var arguments = context.RequiresMSBuildRevaluation ? new[] { "msbuild", "/t:Build", "/restore", "/nologo" } : new[] { "msbuild", "/t:Build", "/nologo" }; var processSpec = new ProcessSpec { Executable = _muxer, Arguments = arguments, WorkingDirectory = context.ProcessSpec.WorkingDirectory, }; _reporter.Output("Building..."); var exitCode = await _processRunner.RunAsync(processSpec, cancellationToken); if (exitCode == 0) { return; } // If the build fails, we'll retry until we have a successful build. context.ChangedFile = await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _reporter.Warn("Waiting for a file to change before restarting dotnet...")); } }
public async Task WatchAsync(DotNetWatchContext context, CancellationToken cancellationToken) { var processSpec = context.ProcessSpec; if (context.SuppressMSBuildIncrementalism) { _reporter.Verbose("MSBuild incremental optimizations suppressed."); } _reporter.Output("Hot reload enabled. For a list of supported edits, see https://aka.ms/dotnet/hot-reload. " + "Press \"Ctrl + R\" to restart."); while (true) { context.Iteration++; for (var i = 0; i < _filters.Length; i++) { await _filters[i].ProcessAsync(context, cancellationToken); } // Reset for next run context.RequiresMSBuildRevaluation = false; processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = (context.Iteration + 1).ToString(CultureInfo.InvariantCulture); var fileSet = context.FileSet; if (fileSet == null) { _reporter.Error("Failed to find a list of files to watch"); return; } if (!fileSet.Project.IsNetCoreApp60OrNewer()) { _reporter.Error($"Hot reload based watching is only supported in .NET 6.0 or newer apps. Update the project's launchSettings.json to disable this feature."); return; } if (cancellationToken.IsCancellationRequested) { return; } if (context.Iteration == 0) { ConfigureExecutable(context, processSpec); } using var currentRunCancellationSource = new CancellationTokenSource(); var forceReload = _console.ListenForForceReloadRequest(); using var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token, forceReload); using var fileSetWatcher = new FileSetWatcher(fileSet, _reporter); try { using var hotReload = new HotReload(_processRunner, _reporter); await hotReload.InitializeAsync(context, cancellationToken); var processTask = _processRunner.RunAsync(processSpec, combinedCancellationSource.Token); var args = string.Join(" ", processSpec.Arguments); _reporter.Verbose($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _reporter.Output("Started"); Task <FileItem?> fileSetTask; Task finishedTask; while (true) { fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); finishedTask = await Task.WhenAny(processTask, fileSetTask).WaitAsync(combinedCancellationSource.Token); if (finishedTask != fileSetTask || fileSetTask.Result is not FileItem fileItem) { // The app exited. break; } else { _reporter.Output($"File changed: {fileItem.FilePath}."); var start = Stopwatch.GetTimestamp(); if (await hotReload.TryHandleFileChange(context, fileItem, combinedCancellationSource.Token)) { var totalTime = TimeSpan.FromTicks(Stopwatch.GetTimestamp() - start); _reporter.Output($"Hot reload of changes succeeded."); _reporter.Verbose($"Hot reload applied in {totalTime.TotalMilliseconds}ms."); } else { _reporter.Verbose($"Unable to handle changes to {fileItem.FilePath}. Rebuilding the app."); break; } } } // Regardless of the which task finished first, make sure everything is cancelled // and wait for dotnet to exit. We don't want orphan processes currentRunCancellationSource.Cancel(); await Task.WhenAll(processTask, fileSetTask); if (processTask.Result != 0 && finishedTask == processTask && !cancellationToken.IsCancellationRequested) { // Only show this error message if the process exited non-zero due to a normal process exit. // Don't show this if dotnet-watch killed the inner process due to file change or CTRL+C by the user _reporter.Error($"Exited with error code {processTask.Result}"); } else { _reporter.Output("Exited"); } if (finishedTask == processTask) { // Process exited. Redo evaludation context.RequiresMSBuildRevaluation = true; // Now wait for a file to change before restarting process context.ChangedFile = await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _reporter.Warn("Waiting for a file to change before restarting dotnet...")); } else { Debug.Assert(finishedTask == fileSetTask); var changedFile = fileSetTask.Result; context.ChangedFile = changedFile; } }
public async Task WatchAsync(DotNetWatchContext context, CancellationToken cancellationToken) { var cancelledTaskSource = new TaskCompletionSource(); cancellationToken.Register(state => ((TaskCompletionSource)state).TrySetResult(), cancelledTaskSource); var processSpec = context.ProcessSpec; var initialArguments = processSpec.Arguments.ToArray(); if (context.SuppressMSBuildIncrementalism) { _reporter.Verbose("MSBuild incremental optimizations suppressed."); } while (true) { context.Iteration++; // Reset arguments processSpec.Arguments = initialArguments; for (var i = 0; i < _filters.Length; i++) { await _filters[i].ProcessAsync(context, cancellationToken); } // Reset for next run context.RequiresMSBuildRevaluation = false; processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = (context.Iteration + 1).ToString(CultureInfo.InvariantCulture); var fileSet = context.FileSet; if (fileSet == null) { _reporter.Error("Failed to find a list of files to watch"); return; } if (cancellationToken.IsCancellationRequested) { return; } using (var currentRunCancellationSource = new CancellationTokenSource()) using (var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token)) using (var fileSetWatcher = new FileSetWatcher(fileSet, _reporter)) { var processTask = _processRunner.RunAsync(processSpec, combinedCancellationSource.Token); var args = string.Join(" ", processSpec.Arguments); _reporter.Verbose($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _reporter.Output("Started"); Task <FileItem?> fileSetTask; Task finishedTask; while (true) { fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); finishedTask = await Task.WhenAny(processTask, fileSetTask, cancelledTaskSource.Task); if (finishedTask == fileSetTask && fileSetTask.Result is FileItem fileItem && await _staticFileHandler.TryHandleFileChange(context, fileItem, combinedCancellationSource.Token)) { // We're able to handle the file change event without doing a full-rebuild. }
public async Task WatchAsync(ProcessSpec processSpec, IFileSetFactory fileSetFactory, string replica, CancellationToken cancellationToken) { var cancelledTaskSource = new TaskCompletionSource <object>(); cancellationToken.Register(state => ((TaskCompletionSource <object>)state !).TrySetResult(null !), cancelledTaskSource); var iteration = 1; while (true) { if (cancellationToken.IsCancellationRequested) { return; } processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = iteration.ToString(CultureInfo.InvariantCulture); iteration++; var fileSet = await fileSetFactory.CreateAsync(cancellationToken); if (fileSet == null) { _logger.LogError("watch: Failed to find a list of files to watch"); return; } using (var currentRunCancellationSource = new CancellationTokenSource()) using (var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token)) using (var fileSetWatcher = new FileSetWatcher(fileSet, _logger)) { var fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); var processTask = ProcessUtil.RunAsync(processSpec, combinedCancellationSource.Token, throwOnError: false); var args = processSpec.Arguments !; _logger.LogDebug($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _logger.LogInformation("watch: {Replica} Started", replica); var finishedTask = await Task.WhenAny(processTask, fileSetTask, cancelledTaskSource.Task); // Regardless of the which task finished first, make sure everything is cancelled // and wait for dotnet to exit. We don't want orphan processes currentRunCancellationSource.Cancel(); await Task.WhenAll(processTask, fileSetTask); if (processTask.Result.ExitCode != 0 && finishedTask == processTask && !cancellationToken.IsCancellationRequested) { // Only show this error message if the process exited non-zero due to a normal process exit. // Don't show this if dotnet-watch killed the inner process due to file change or CTRL+C by the user _logger.LogError($"watch: Exited with error code {processTask.Result}"); } else { _logger.LogInformation("watch: {Replica} Exited", replica); } if (finishedTask == cancelledTaskSource.Task || cancellationToken.IsCancellationRequested) { return; } if (finishedTask == processTask) { // Now wait for a file to change before restarting process await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _logger.LogWarning("Waiting for a file to change before restarting dotnet...")); } if (!string.IsNullOrEmpty(fileSetTask.Result)) { _logger.LogInformation($"watch: File changed: {fileSetTask.Result}"); } if (processSpec.Build != null) { while (true) { if (cancellationToken.IsCancellationRequested) { break; } var exitCode = await processSpec.Build(); if (exitCode == 0) { break; // Build failed, keep retrying builds until successful build. } await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _logger.LogWarning("Waiting for a file to change before restarting dotnet...")); } } } } }
public async Task WatchAsync(ProcessSpec processSpec, CancellationToken cancellationToken) { Ensure.NotNull(processSpec, nameof(processSpec)); var cancelledTaskSource = new TaskCompletionSource(); cancellationToken.Register(state => ((TaskCompletionSource)state).TrySetResult(), cancelledTaskSource); var initialArguments = processSpec.Arguments.ToArray(); var context = new DotNetWatchContext { Iteration = -1, ProcessSpec = processSpec, Reporter = _reporter, SuppressMSBuildIncrementalism = _dotnetWatchOptions.SuppressMSBuildIncrementalism, }; if (context.SuppressMSBuildIncrementalism) { _reporter.Verbose("MSBuild incremental optimizations suppressed."); } while (true) { context.Iteration++; // Reset arguments processSpec.Arguments = initialArguments; for (var i = 0; i < _filters.Length; i++) { await _filters[i].ProcessAsync(context, cancellationToken); } // Reset for next run context.RequiresMSBuildRevaluation = false; processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = (context.Iteration + 1).ToString(CultureInfo.InvariantCulture); var fileSet = context.FileSet; if (fileSet == null) { _reporter.Error("Failed to find a list of files to watch"); return; } if (cancellationToken.IsCancellationRequested) { return; } using (var currentRunCancellationSource = new CancellationTokenSource()) using (var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token)) using (var fileSetWatcher = new FileSetWatcher(fileSet, _reporter)) { var processTask = _processRunner.RunAsync(processSpec, combinedCancellationSource.Token); var args = ArgumentEscaper.EscapeAndConcatenate(processSpec.Arguments); _reporter.Verbose($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _reporter.Output("Started"); Task <FileItem?> fileSetTask; Task finishedTask; while (true) { fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); finishedTask = await Task.WhenAny(processTask, fileSetTask, cancelledTaskSource.Task); if (context.BrowserRefreshServer is not null && finishedTask == fileSetTask && fileSetTask.Result is FileItem { FileKind : FileKind.StaticFile } file) { _reporter.Verbose($"Handling file change event for static content {file.FilePath}."); // If we can handle the file change without a browser refresh, do it. await StaticContentHandler.TryHandleFileAction(context.BrowserRefreshServer, file, combinedCancellationSource.Token); }
public async Task WatchAsync(ProcessSpec processSpec, IFileSetFactory fileSetFactory, CancellationToken cancellationToken) { Ensure.NotNull(processSpec, nameof(processSpec)); var cancelledTaskSource = new TaskCompletionSource <object>(); cancellationToken.Register(state => ((TaskCompletionSource <object>)state).TrySetResult(null), cancelledTaskSource); var iteration = 1; while (true) { processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = iteration.ToString(CultureInfo.InvariantCulture); iteration++; var fileSet = await fileSetFactory.CreateAsync(cancellationToken); if (fileSet == null) { _reporter.Error("Failed to find a list of files to watch"); return; } if (cancellationToken.IsCancellationRequested) { return; } using (var currentRunCancellationSource = new CancellationTokenSource()) using (var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token)) using (var fileSetWatcher = new FileSetWatcher(fileSet, _reporter)) { var fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); var processTask = _processRunner.RunAsync(processSpec, combinedCancellationSource.Token); var args = ArgumentEscaper.EscapeAndConcatenate(processSpec.Arguments); _reporter.Verbose($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _reporter.Output("Started"); var finishedTask = await Task.WhenAny(processTask, fileSetTask, cancelledTaskSource.Task); // Regardless of the which task finished first, make sure everything is cancelled // and wait for dotnet to exit. We don't want orphan processes currentRunCancellationSource.Cancel(); await Task.WhenAll(processTask, fileSetTask); if (processTask.Result != 0 && finishedTask == processTask && !cancellationToken.IsCancellationRequested) { // Only show this error message if the process exited non-zero due to a normal process exit. // Don't show this if dotnet-watch killed the inner process due to file change or CTRL+C by the user _reporter.Error($"Exited with error code {processTask.Result}"); } else { _reporter.Output("Exited"); } if (finishedTask == cancelledTaskSource.Task || cancellationToken.IsCancellationRequested) { return; } if (finishedTask == processTask) { _reporter.Warn("Waiting for a file to change before restarting dotnet..."); // Now wait for a file to change before restarting process await fileSetWatcher.GetChangedFileAsync(cancellationToken); } if (!string.IsNullOrEmpty(fileSetTask.Result)) { _reporter.Output($"File changed: {fileSetTask.Result}"); } } } }
public async Task WatchAsync(ProcessSpec processSpec, CancellationToken cancellationToken) { Ensure.NotNull(processSpec, nameof(processSpec)); var cancelledTaskSource = new TaskCompletionSource(); cancellationToken.Register(state => ((TaskCompletionSource)state).TrySetResult(), cancelledTaskSource); var initialArguments = processSpec.Arguments.ToArray(); var suppressMSBuildIncrementalism = Environment.GetEnvironmentVariable("DOTNET_WATCH_SUPPRESS_MSBUILD_INCREMENTALISM"); var context = new DotNetWatchContext { Iteration = -1, ProcessSpec = processSpec, Reporter = _reporter, SuppressMSBuildIncrementalism = suppressMSBuildIncrementalism == "1" || suppressMSBuildIncrementalism == "true", }; if (context.SuppressMSBuildIncrementalism) { _reporter.Verbose("MSBuild incremental optimizations suppressed."); } while (true) { context.Iteration++; // Reset arguments processSpec.Arguments = initialArguments; for (var i = 0; i < _filters.Length; i++) { await _filters[i].ProcessAsync(context, cancellationToken); } // Reset for next run context.RequiresMSBuildRevaluation = false; processSpec.EnvironmentVariables["DOTNET_WATCH_ITERATION"] = (context.Iteration + 1).ToString(CultureInfo.InvariantCulture); var fileSet = context.FileSet; if (fileSet == null) { _reporter.Error("Failed to find a list of files to watch"); return; } if (cancellationToken.IsCancellationRequested) { return; } using (var currentRunCancellationSource = new CancellationTokenSource()) using (var combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource( cancellationToken, currentRunCancellationSource.Token)) using (var fileSetWatcher = new FileSetWatcher(fileSet, _reporter)) { var fileSetTask = fileSetWatcher.GetChangedFileAsync(combinedCancellationSource.Token); var processTask = _processRunner.RunAsync(processSpec, combinedCancellationSource.Token); var args = ArgumentEscaper.EscapeAndConcatenate(processSpec.Arguments); _reporter.Verbose($"Running {processSpec.ShortDisplayName()} with the following arguments: {args}"); _reporter.Output("Started"); var finishedTask = await Task.WhenAny(processTask, fileSetTask, cancelledTaskSource.Task); // Regardless of the which task finished first, make sure everything is cancelled // and wait for dotnet to exit. We don't want orphan processes currentRunCancellationSource.Cancel(); await Task.WhenAll(processTask, fileSetTask); if (processTask.Result != 0 && finishedTask == processTask && !cancellationToken.IsCancellationRequested) { // Only show this error message if the process exited non-zero due to a normal process exit. // Don't show this if dotnet-watch killed the inner process due to file change or CTRL+C by the user _reporter.Error($"Exited with error code {processTask.Result}"); } else { _reporter.Output("Exited"); } if (finishedTask == cancelledTaskSource.Task || cancellationToken.IsCancellationRequested) { return; } context.ChangedFile = fileSetTask.Result; if (finishedTask == processTask) { // Process exited. Redo evaludation context.RequiresMSBuildRevaluation = true; // Now wait for a file to change before restarting process context.ChangedFile = await fileSetWatcher.GetChangedFileAsync(cancellationToken, () => _reporter.Warn("Waiting for a file to change before restarting dotnet...")); } if (!string.IsNullOrEmpty(fileSetTask.Result)) { _reporter.Output($"File changed: {fileSetTask.Result}"); } } } }