;;; mrs-version-file should be set up to point to a file which contains two
;;; fixnums. The first number is the version number of the MRS, and the second
;;; number is the number of modifications that have been made.  Every time
;;; an MRS is made, the mod number will be incremented.  To bootstrap the
;;; system, the file should contain 4 1".

(declare (special mrsversion))

#+franz
(defun mrs-top-level ()
       (cond ((plist 'user-top-level)
	      (prog (home rcfile)
		    (princ "MRS Version ")
		    (princ mrsversion)
		    (princ " in ")
		    (princ (status version)) (terpri) (terpri)
		    (setq rcfile (parse-command-line)
			  home (getenv '|HOME|))
		    (cond (rcfile (or (and (probef rcfile)
					   (load rcfile))
				      (and (probef (concat home "/" rcfile))
					   (load (concat home "/" rcfile)))
				      (and (probef ".mrsrc")
					   (load ".mrsrc"))
				      (and (probef (concat home "/" ".mrsrc"))
					   (load (concat home "/" ".mrsrc"))))))
		    (setq user-top-level nil)
		    (setplist 'user-top-level nil)
		    (remob 'mrs-top-level)))))

#+franz
(defun parse-command-line ()
       (prog (rcfile args arg file)
	     (setq progrm (stripdirectory (argv 0)))
	     (setq rcfile (concat "." progrm "rc"))
;	     (setq rcfile (concat ".mrsrc")) ;always look for .mrsrc
	     (setq args (1- (argv -1))
		   arg 0)
	     loop
	     (cond ((= arg args) (return rcfile))
		   (t (setq arg (1+ arg))))
	     (cond ((eq (argv arg) '-f)
		    (setq rcfile nil))
		   ((eq (argv arg) '-r)
		    (load (argv (setq arg (1+ arg)))))
		   (t (princ (argv arg))
		      (princ " unknown switch, ignored.")
		      (terpri)))
	     (go loop)))

#+franz
(defun stripdirectory (file)
       (let ((temp (explodec file)))
	    (do ((proc (memq '/ temp) (memq '/ temp)))
		((null proc) (implode temp))
		(setq temp (cdr proc)))))

#+franz
(defun read-version ()
       (let* ((file (infile mrs-version-file))
	      (ver (read file)) (mod (read file)))
	 (close file)
	 (setq file (outfile mrs-version-file))
	 (princ ver file)
	 (princ " " file)
	 (princ (1+ mod) file)
	 (terpri file)
	 (close file)
	 (setq ver (implode (nconc (explodec ver) (ncons '|.|) (explodec mod))))
	 (setq mrsversion ver)))

#-franz
(defun read-version ()
       (let* ((file (open mrs-version-file 'in))
	      (ver (read file)) (mod (read file)))
	 (close file)
	 (setq file (open mrs-version-file 'out))
	 (princ ver file)
	 (princ " " file)
	 (princ (1+ mod) file)
	 (terpri file)
	 (close file)
	 (setq ver (implode (nconc (explodec ver) (ncons '|.|) (explodec mod))))
	 (setq mrsversion ver)))



#+franz(setplist 'user-top-level '(t))
#+franz(setq user-top-level 'mrs-top-level)
(sstatus feature mrs)
(read-version)