How to Change Project Explorer's Default Location and Ignore Dotfiles?

[veqqq]

Adding (setf lem.file-browser::*show-hidden* nil) lets me see normal folders (but still shows hidden too). I've not been able to determine how to open into a different directory e.g. "~/Sandbox"

[vindarel]

I've not been able to determine how to open into a different directory e.g. "~/Sandbox"

I think there is currently no way! Except opening a new buffer (even if a directory list) and calling M-x filer-directory, that opens at the current buffer's directory.

Here's a function, good for a PR:

(define-command filer-at-directory () ()
  (let ((directory (prompt-for-directory "Directory: "
                                         :directory (buffer-directory)
                                         :gravity :cursor
                                         :use-border t)))
    (when (filer-active-p)
      (deactive-filer)
    (make-leftside-window (make-filer-buffer directory)))))

call M-x filer-at-directory RET choose directory RET