protected override int ExecuteTool(string pathToTool, string responseFileCommands, string commandLineCommands) { if (ProvideCommandLineArgs) { CommandLineArgs = GetArguments(commandLineCommands, responseFileCommands) .Select(arg => new TaskItem(arg)).ToArray(); } if (SkipCompilerExecution) { return(0); } if (!UseSharedCompilation || !string.IsNullOrEmpty(ToolPath) || !BuildServerConnection.IsCompilerServerSupported) { return(base.ExecuteTool(pathToTool, responseFileCommands, commandLineCommands)); } using (_sharedCompileCts = new CancellationTokenSource()) { try { CompilerServerLogger.Log($"CommandLine = '{commandLineCommands}'"); CompilerServerLogger.Log($"BuildResponseFile = '{responseFileCommands}'"); var clientDir = Path.GetDirectoryName(pathToTool); // Note: we can't change the "tool path" printed to the console when we run // the Csc/Vbc task since MSBuild logs it for us before we get here. Instead, // we'll just print our own message that contains the real client location Log.LogMessage(ErrorString.UsingSharedCompilation, clientDir); var workingDir = CurrentDirectoryToUse(); var buildPaths = new BuildPathsAlt( clientDir: clientDir, // MSBuild doesn't need the .NET SDK directory sdkDir: null, workingDir: workingDir, tempDir: BuildServerConnection.GetTempPath(workingDir)); var responseTask = BuildServerConnection.RunServerCompilation( Language, GetArguments(commandLineCommands, responseFileCommands).ToList(), buildPaths, keepAlive: null, libEnvVariable: LibDirectoryToUse(), cancellationToken: _sharedCompileCts.Token); responseTask.Wait(_sharedCompileCts.Token); var response = responseTask.Result; if (response != null) { ExitCode = HandleResponse(response, pathToTool, responseFileCommands, commandLineCommands); } else { Log.LogMessage(ErrorString.SharedCompilationFallback, pathToTool); ExitCode = base.ExecuteTool(pathToTool, responseFileCommands, commandLineCommands); } } catch (OperationCanceledException) { ExitCode = 0; } catch (Exception e) { Log.LogErrorWithCodeFromResources("Compiler_UnexpectedException"); LogErrorOutput(e.ToString()); ExitCode = -1; } } return(ExitCode); }