LibraryPathsForAsset.cs

using System.IO;
using System.Text;
using UnityEditor;
using UnityEditor.Experimental;
using UnityEngine;

public class LibraryPathsForAsset
{
    [MenuItem("AssetDatabase/OutputLibraryPathsForAsset")]
    public static void OutputLibraryPathsForAsset()
    {
        var assetPath = "Assets/Shaders/Mat05.mat";

        StringBuilder assetPathInfo = new StringBuilder();
        
        var guidString = AssetDatabase.AssetPathToGUID(assetPath);
        var hash = AssetDatabaseExperimental.GetArtifactHash(guidString);

        AssetDatabaseExperimental.GetArtifactPaths(hash, out var paths);

        assetPathInfo.Append($"Files associated with {assetPath}");
        assetPathInfo.AppendLine();
        
        foreach (var curVirtualPath in paths)
        {
            //The virtual path redirects somewhere, so we get the 
            //actual path on disk (or on the in memory database, accordingly)
            var curPath = Path.GetFullPath(curVirtualPath);
            assetPathInfo.Append("\t" + curPath);
            assetPathInfo.AppendLine();
        }

        Debug.Log("Path info for all assets:\n"+assetPathInfo.ToString());
    }
}