[OS X Emacs] Emacs -> Skim sync not workin' [SOLVED]

David Reitter david.reitter at gmail.com
Sat Sep 20 22:03:57 EDT 2008

On 20 Sep 2008, at 21:26, Christopher Menzel wrote:
>   Tom's problem had to do with loading a file into Aquamacs whose  
> full pathname included the string "TeX".  Tom typed "tex" and  
> Aquamacs was smart enough to do the conversion to upper case and  
> load the file, but apparently the incorrectly typed name was stored  
> for use in forward/inverse searching.

Ah, sounds familiar.  Thanks for jogging my mind.
> However, I like having the folders containing all of my research  
> papers in a single directory (~/Research/papers) beneath my Home  
> directory, so I had created *symlinks* to the research folders on my  
> (local) iDisk.  The problem with Aquamacs -> Skim syncing only  
> arises if I use the symlink to load a paper into Aquamacs; if I call  
> it instead via its actual path on the iDisk (e.g., /Volumes/c.menzel/ 
> Research/papers/foo/foo.tex) I get Aquamacs -> Skim syncing back.

Excellent analysis.

> So the bottom line here is that something in the syncing process  
> doesn't like symlinks.  (I'm guessing Applescript.)

Applescript should just pass on the POSIX style paths.

I suspect that Skim compares the files, and it uses the canonical file  
name rather than what it was started with.
I just wrote the code below that addresses this issue - I do think  
that a fix should go into Skim rather than Aquamacs.

- D

http://aquamacs.org -- Aquamacs: Emacs on Mac OS X
http://aquamacs.org/donate -- Could we help you? Return the favor and  
support the Aquamacs Project!

(defun canonicalize-file-name (file)
   "Expand symlinks in file name.
Otherwise, like `expand-file-name'."
   (let ((f ""))
      (lambda (x)
        (setq f
	     (let* ((f2 (concat f "/" x))
		    (exp (file-symlink-p f2)))
	       (if exp (concat f "/" exp) f2))))
      (cdr (split-string (expand-file-name file) "/")))

(defun aquamacs-call-viewer (the-file line source)
"Display THE-FILE as PDF at LINE (as in file SOURCE).
Calls `aquamacs-tex-pdf-viewer' to display the PDF file THE-FILE."
   (let ((full-file-name
	  (and buffer-file-name (file-name-directory buffer-file-name))))
	(and buffer-file-name (file-name-directory buffer-file-name)))))
  set theSink to POSIX file \"%s\"
  set theSource to POSIX file \"%s\"
  tell application \"%s\"
      open theSink
      tell front document to go to TeX line %d from theSource
   end tell
" full-file-name (canonicalize-file-name full-source-name)
aquamacs-tex-pdf-viewer line))))

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