;; Return the current revisions in branch as an alist

;; Copyright (C) 2002, 2003 Walter Landry and the Regents of the University
;; of California

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

(put 'arx-get-revisions-error
     'error-conditions
     '(error arx-error arx-get-revisions-error))

(put 'arx-get-revisions-error 'error-message "arx-get-revisions failed")

(defun arx-get-revisions (branch)
  "Return the current revisions in branch as an alist"
  (let ((revisions (assoc branch arx-revision-alist)))
    (if (not (car revisions))
	(progn
	  (setq
	   arx-revision-alist
	   (cons
	    (cons
	     branch
	     (save-current-buffer
	       (set-buffer (get-buffer-create "*arx*"))
	       (erase-buffer)
	       (if (= 0 (call-process "arx" nil "*arx*" t "revisions" "--full"
				      branch))
		   (split-string (buffer-string) "\n")
		 (progn (display-buffer "*arx*" t)
			(signal 'arx-get-revisions-error (list branch))))))
	    arx-revision-alist))
	  (cdr (assoc branch arx-revision-alist)))
      (cdr revisions))))