Quickly move a file to the current directory

Often I’ll download a file in my browser, and then want to move that file to the directory in which I am working in emacs. I wrote a little helper function to streamline this, called bjm/move-file-here, given below or at this github gist. Call the function and it will prompt you with a list of files in your starting directory (defaulting to ~/downloads, but configurable with bjm/move-file-here-start-dir) sorted to have the most recent first. The chosen file will then be moved to the current directory if you are in dired, or else the directory of the current buffer.

The function needs the packages dash.el and swiper installed. Here is the code – comments are welcome.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; move file here                                                         ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'dash)
(require 'swiper)

;; start directory
(defvar bjm/move-file-here-start-dir (expand-file-name "~/downloads"))

(defun bjm/move-file-here ()
  "Move file from somewhere else to here.
The file is taken from a start directory set by `bjm/move-file-here-start-dir' and moved to the current directory if invoked in dired, or else the directory containing current buffer. The user is presented with a list of files in the start directory, from which to select the file to move, sorted by most recent first."
  (interactive)
  (let (file-list target-dir file-list-sorted start-file start-file-full)
    ;; clean directories from list but keep times
    (setq file-list
          (-remove (lambda (x) (nth 1 x))
                   (directory-files-and-attributes bjm/move-file-here-start-dir)))

    ;; get target directory
    ;; http://ergoemacs.org/emacs/emacs_copy_file_path.html
    (setq target-dir
          (if (equal major-mode 'dired-mode)
              (expand-file-name default-directory)
            (if (null (buffer-file-name))
                (user-error "ERROR: current buffer is not associated with a file.")
              (file-name-directory (buffer-file-name)))))

  ;; sort list by most recent
  ;;http://stackoverflow.com/questions/26514437/emacs-sort-list-of-directories-files-by-modification-date
  (setq file-list-sorted
        (mapcar #'car
                (sort file-list
                      #'(lambda (x y) (time-less-p (nth 6 y) (nth 6 x))))))

  ;; use ivy to select start-file
  (setq start-file (ivy-read
                    (concat "Move selected file to " target-dir ":")
                    file-list-sorted
                    :re-builder #'ivy--regex
                    :sort nil
                    :initial-input nil))

  ;; add full path to start file and end-file
  (setq start-file-full
        (expand-file-name start-file bjm/move-file-here-start-dir))
  (setq end-file
        (expand-file-name (file-name-nondirectory start-file) target-dir))
  (rename-file start-file-full end-file)
  (message "moved %s to %s" start-file-full end-file)))