How do I complete file paths in emacs?

Question

Say for instance I'm editing a config file and I want to type in a path. Is there a plugin for emacs that lets you complete a file path in that buffer? I've searched for this and there's like a bazillion completion plugins out there.

Answer 1

Try Hippie Expand, which as one of it's possibilities has 'try-complete-file-name. You can change the order and list of expansion functions hippie expand will use to favor expanding the file name.

Or, you could even write a custom wrapper that would only do the file name expansion. Something like:

(global-set-key (kbd "C-M-/") 'my-expand-file-name-at-point)
(defun my-expand-file-name-at-point ()
  "Use hippie-expand to expand the filename"
  (interactive)
  (let ((hippie-expand-try-functions-list '(try-complete-file-name-partially try-complete-file-name)))
    (call-interactively 'hippie-expand)))

Answer 2

I usually type Ctrl-X Ctrl-F like I would open a file, but instead of pressing RET I press Ctrl-A Ctrl-K Ctrl-G to copy the path and then paste it into the buffer I was editing with Ctrl-Y.

I don't need this often enough, but if I really wanted a better solution, I would definitely use Trey Jackson's solution using hippie-expand. I thought about how hippie-expand might be a better way to do this when first answering, but I didn't know and was too lazy to look it up, so I just wrote what I do.

Answer 3

I recently discovered the works of Tomohiro Matsuyama (@m2ym) and I have been very impressed by the quality of its emacs packages.

I have struggled with most auto-completion extensions and found out that they all have major shortcomings.

Check out Tomo's auto-complete (http://cx4a.org/software/auto-complete/) it has been a breeze to install (I'm on Linux) and covers many auto-completion needs in a modern fashion.

Of course, your request for in-buffer file names completion is perfectly covered.

Finally, if you happen to do Ruby too, make sure not to miss his RSense extension; again, the best of its kind.