private static Task <Solution?> GetSolutionFixesAsync(FixAllContext fixAllContext, FixAllContexts fixAllContextsAsync)
{
var solution = fixAllContext.Solution;
var dependencyGraph = solution.GetProjectDependencyGraph();
// Walk through each project in topological order, determining and applying the diagnostics for each
// project. We do this in topological order so that the compilations for successive projects are readily
// available as we just computed them for dependent projects. If we were to do it out of order, we might
// start with a project that has a ton of dependencies, and we'd spend an inordinate amount of time just
// building the compilations for it before we could proceed.
//
// By processing one project at a time, we can also let go of a project once done with it, allowing us to
// reclaim lots of the memory so we don't overload the system while processing a large solution.
//
// Note: we have to filter down to projects of the same language as the FixAllContext points at a
// CodeFixProvider, and we can't call into providers of different languages with diagnostics from a
// different language.
var sortedProjects = dependencyGraph.GetTopologicallySortedProjects()
.Select(id => solution.GetRequiredProject(id))
.Where(p => p.Language == fixAllContext.Project.Language);
return(fixAllContextsAsync(
fixAllContext,
sortedProjects.SelectAsArray(p => fixAllContext.WithScope(FixAllScope.Project).WithProject(p).WithDocument(null))));
}
