elips macro that return's the current file's filename

Question

I want to define a action that says open <config file> within the actual config file itself. However, this config file may be in a different location on different computers. How can I get the current file's filename with a macro?

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In this example, I'm looking avoid typing "etude-module-lisp" or the filename of the file in this particular piece of code:

(on/mode: [::lisp   lisp-interaction-mode]
  "etude-module-lisp"
  ::eval-cursor    'eval-last-sexp
  ::eval-buffer    'eval-buffer)

Answer 1

You can use the variable load-file-name for this. Note that it's only bound while your file is loading. So this doesn't work (because you finished loading foo.el or foo.elc before foo-function is called):

(defun foo-function ()
  (message "loaded from %s" load-file-name))

You should save the value when the file is being loaded, e.g.:

(defconst foo-file (or load-file-name buffer-file-name))

(defun foo-function ()
  (message "loaded from %s" foo-file))

Falling back to buffer-file-name lets it work with eval-buffer as well as load.