deleteTreeOpenInitialSubpath

fn deleteTreeOpenInitialSubpath(dir: Dir, io: Io, sub_path: []const u8, kind_hint: File.Kind) !?Dir {
    return iterable_dir: {
        // Treat as a file by default
        var treat_as_dir = kind_hint == .directory;

        handle_entry: while (true) {
            if (treat_as_dir) {
                break :iterable_dir dir.openDir(io, sub_path, .{
                    .follow_symlinks = false,
                    .iterate = true,
                }) catch |err| switch (err) {
                    error.NotDir => {
                        treat_as_dir = false;
                        continue :handle_entry;
                    },
                    error.FileNotFound => {
                        // That's fine, we were trying to remove this directory anyway.
                        return null;
                    },

                    error.AccessDenied,
                    error.PermissionDenied,
                    error.SymLinkLoop,
                    error.ProcessFdQuotaExceeded,
                    error.NameTooLong,
                    error.SystemFdQuotaExceeded,
                    error.NoDevice,
                    error.SystemResources,
                    error.Unexpected,
                    error.BadPathName,
                    error.NetworkNotFound,
                    error.Canceled,
                    => |e| return e,
                };
            } else {
                if (dir.deleteFile(io, sub_path)) {
                    return null;
                } else |err| switch (err) {
                    error.FileNotFound => return null,

                    error.IsDir => {
                        treat_as_dir = true;
                        continue :handle_entry;
                    },

                    error.AccessDenied,
                    error.PermissionDenied,
                    error.SymLinkLoop,
                    error.NameTooLong,
                    error.SystemResources,
                    error.ReadOnlyFileSystem,
                    error.NotDir,
                    error.FileSystem,
                    error.FileBusy,
                    error.BadPathName,
                    error.NetworkNotFound,
                    error.Canceled,
                    error.Unexpected,
                    => |e| return e,
                }
            }
        }
    };
}