protected override async Task <Solution> ProcessImpl(Task <string> previousTask)
{
var slnObject = await previousTask;
Contract.Assert(slnObject is string fileName && !string.IsNullOrEmpty(fileName),
"Expected previous task to return a " +
$"solution filename. Instead returned {slnObject}");
var slnName = slnObject;
Contract.Assert(File.Exists(slnName), $"Expected to find {slnName} on the file system, but couldn't.");
// Log any solution loading issues
_workspace.WorkspaceFailed += (sender, args) =>
{
var message = $"Issue during solution loading: {sender}: {args.Diagnostic.Message}";
var logLevel = args.Diagnostic.Kind == WorkspaceDiagnosticKind.Failure ? LogLevel.Error : LogLevel.Warning;
Logger.Log(logLevel, message);
};
// Roslyn does not support FSharp projects, but .fsproj has same structure as .csproj files,
// so can treat them as a known project type to support diff tracking
_workspace.AssociateFileExtensionWithLanguage("fsproj", LanguageNames.CSharp);
return(await _workspace.OpenSolutionAsync(slnName, _progress, CancellationToken));
}