GetProjectDependencyGraph を mermaid 記法出力

DependencyAnalyzer.cs

using Microsoft.Build.Locator;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.MSBuild;

class DependencyAnalyzer
{
    public static async ValueTask WriteMermaidGraph(string path)
    {
        MSBuildLocator.RegisterDefaults();
        var workspace = MSBuildWorkspace.Create();
        var sln = await workspace.OpenSolutionAsync(path);
        WriteMermaidGraph(GetProjectDependencies(sln));
    }

    private static IEnumerable<(string from, string to)> GetProjectDependencies(Solution sln)
    {
        var graph = sln.GetProjectDependencyGraph();

        foreach (var pid in graph.GetTopologicallySortedProjects())
        {
            var p = sln.GetProject(pid)!;
            var pn = name(p);

            foreach (var rid in GetDirectDependecy(graph, p))
            {
                var rp = sln.GetProject(rid)!;
                var rpn = name(rp);
                yield return (pn, rpn);
            }
        }

        static string name(Project p) => p.Name.Replace('(', '_').Replace(')', ' ');
    }

    // なんか、GetProjectsThatThisProjectDirectlyDependsOn が返す内容が direct じゃない…
    // よくわからないし解決方法見つからず。
    // しょうがないんで、逆に、 transitive なのが帰ってくる想定で ExceptFor しまくる。
    private static IEnumerable<ProjectId> GetDirectDependecy(ProjectDependencyGraph graph, Project p)
    {
        var deps = graph.GetProjectsThatThisProjectDirectlyDependsOn(p.Id).AsEnumerable();
        foreach (var d in deps.ToArray())
        {
            deps = deps.Except(graph.GetProjectsThatThisProjectDirectlyDependsOn(d));
        }
        return deps.ToArray();
    }

    /// <summary>
    /// 依存関係を mermaid graph で <see cref="Console"/> に出力。
    /// </summary>
    /// <param name="dependencies"></param>
    private static void WriteMermaidGraph(IEnumerable<(string from, string to)> dependencies)
    {
        Console.WriteLine("""
            ```mermaid
            graph LR
            """);

        foreach (var (from, to) in dependencies)
        {
            Console.WriteLine($"{from} --> {to}");
        }

        Console.WriteLine("""
            ```
            """);

    }
}