bug#14286: Tex-mode always picks the first command in tex-compile-commands on Windows

["Jérôme M. Berger" <jeberger@free.fr>]

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	Tex-mode is supposed to pick the most appropriate command in
tex-compile-commands depending on the situation. However, on Windows
it always picks the first command (and probably on Linux if TeX is
installed in some non-standard locations).

	This is due to the fact that the executables are shell-quoted which
prevents the detection logic in tex-command-active-p from working.
It works on Linux because most of the time shell-quoting leaves the
string intact, whereas on Windows shell-quoting always adds double
quotes around the string.

	I have been able to work around the issue by adding the following
to my configuration:

====================8<--------------------
(defun jb-tex-unquote (str)
  (mapconcat
   (lambda (str) str)
   (split-string-and-unquote str)
   ""))

(defun tex-command-active-p (cmd fspec)
  "Return non-nil if the CMD spec might need to be run."
  (let ((in (nth 1 cmd))
        (out (nth 2 cmd)))
    (if (stringp in)
        (let ((file (jb-tex-unquote (format-spec in fspec))))
          (when (file-exists-p file)
            (or (not out)
                (file-newer-than-file-p
                 file (jb-tex-unquote
                       (format-spec out fspec))))))
      (when (and (eq in t) (stringp out))
        (not (tex-uptodate-p (jb-tex-unquote
                              (format-spec out fspec))))))))
-------------------->8====================

		Jerome
-- 
mailto:jeberger@free.fr
http://jeberger.free.fr
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