[Mac-emacs-users] [Paul at tesseract.org: Emacs for OS X, command-line open]

[Andrew C. <ak...@sh...>]

Here's a tip I received from R. Paul Wiegand showing how one can pass
command line options to Emacs:

-----
You will need to do two things:
   1.)  Create a script file which you will use to launch emacs at the
        command line (say:  em).  Obviously make sure it is in path...
   2.)  Add a few lines to your .emacs files.

The script I use is:

   #!/bin/tcsh

   # Set env vars to load in .emacs
   setenv EMACS_LOAD_PATH `pwd`
   setenv EMACS_LOAD_FILENAME $1

   # Supply the correct path to your Emacs.app directory (by default
   # it is in the <build>/mac directory
   open -a /Applications/Document\ Tools/Emacs.app/


The lines I've added to my .emacs file are:

   ;; Pick up env vars from script
   (setq rpw-emacs-load-path (getenv "EMACS_LOAD_PATH"))
   (setq rpw-emacs-load-filename (getenv "EMACS_LOAD_FILENAME"))

   ;; Check if vars exist, or (for filename) were blank
   (cond
     (rpw-emacs-load-path (cd rpw-emacs-load-path)))

   (cond
     (rpw-emacs-load-filename
       (cond
         ( (not (equal rpw-emacs-load-filename ""))
           (find-file rpw-emacs-load-filename)))))


Now I can do the following from the command line:

   % cd ~/
   % em .emacs

and it will load my .emacs file (or whatever file I specify).  If I 
specify no command line option, emacs opens, as usual but the working 
directory is the current directory where I launched it.  If I 
double-click on the icon, it launches as it would otherwise.