public static string GetFilePermissions()

in Lib/Collectors/FileSystemUtils.cs [130:209]
75 lines of code
27 McCabe index (conditional complexity)

        public static string GetFilePermissions(FileSystemInfo fileInfo)
        {
            if (fileInfo != null)
            {
                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
                {
                    var filename = fileInfo.FullName;

                    FileAccessPermissions permissions = default(FileAccessPermissions);

                    try
                    {
                        if (fileInfo is FileInfo)
                        {
                            permissions = new UnixFileInfo(filename).FileAccessPermissions;
                        }
                        else if (fileInfo is DirectoryInfo)
                        {
                            permissions = new UnixDirectoryInfo(filename).FileAccessPermissions;
                        }
                    }
                    catch (Exception e) when (
                        e is IOException
                        || e is InvalidOperationException
                    )
                    {
                        Log.Verbose("Unable to get access control for {0}: {1}", fileInfo.FullName, e.GetType().ToString());
                    }
                    catch (Exception e)
                    {
                        Log.Debug($"Error Getting File Permissions {e.GetType().ToString()}");
                    }

                    return permissions.ToString();
                }
                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                {
                    var filename = fileInfo.FullName;
                    if (filename.Length >= 260 && !filename.StartsWith(@"\\?\"))
                    {
                        filename = $"\\?{filename}";
                    }

                    try
                    {
                        if (fileInfo is FileInfo)
                        {
                            return new FileSecurity(filename, AccessControlSections.All).GetSecurityDescriptorSddlForm(AccessControlSections.All);
                        }
                        else if (fileInfo is DirectoryInfo)
                        {
                            return new DirectorySecurity(filename, AccessControlSections.All).GetSecurityDescriptorSddlForm(AccessControlSections.All);
                        }
                    }
                    catch (Exception e) when (
                        e is ArgumentException
                        || e is ArgumentNullException
                        || e is DirectoryNotFoundException
                        || e is FileNotFoundException
                        || e is IOException
                        || e is NotSupportedException
                        || e is PlatformNotSupportedException
                        || e is PathTooLongException
                        || e is PrivilegeNotHeldException
                        || e is SystemException
                        || e is UnauthorizedAccessException)
                    {
                        var InfoType = fileInfo is FileInfo ? "FileSecurity" : "DirectorySecurity";
                        Log.Verbose($"Error parsing {InfoType} for {fileInfo.FullName} {e.GetType().ToString()}");
                    }
                    catch (Exception e)
                    {
                        Log.Debug($"Error Getting File Permissions {e.GetType().ToString()}");
                    }

                    return string.Empty;
                }
            }
            return string.Empty;
        }