;;; -*-lisp-*-
;;;
;;; Zone generator frontend
;;;
;;; (c) 2005 Straylight/Edgeware
;;;

;;;----- Licensing notice ---------------------------------------------------
;;;
;;; 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.

(defpackage #:zone.frontend
  (:use #:common-lisp #:mdw.sys-base #:optparse #:net #:zone
	#+cmu #:mop
	#+sbcl #:sb-mop)
  (:export #:main))
(in-package #:zone.frontend)

(defvar opt-zones nil
  "Which zones to be emitted.")
(defvar opt-format :bind
  "Which format to use on output.")
(defvar opt-debug nil
  "Whether to emit stack backtraces on error.")

(defun directory-exists-p (name)

  ;; Make a pathname for NAME which has the right form for a directory.
  (let ((dirpath
	 (let ((path (pathname name)))
	   (if (null (pathname-name path))
	       path
	       (make-pathname :directory
			      (append (or (pathname-directory path)
					  (list :relative))
				      (list (pathname-name path)))
			      :name nil
			      :type nil
			      :defaults path)))))

    ;; Now check that it exists.
    #+clisp (and (ext:probe-directory dirpath) (truename dirpath))
    #-clisp (probe-file dirpath)))

(eval-when (:compile-toplevel :load-toplevel)
  (defopthandler dir (var arg) ()
    (let ((path (directory-exists-p arg)))
      (if (and path
	       (not (pathname-name path)))
	  (setf var path)
	  (option-parse-error "path `~A' doesn't name a directory." arg)))))

(define-program
    :version "1.0.0" :usage "ZONEDEF..."
    :help "Generates BIND zone files from Lisp descriptions."
    :options (options help-options
		      "Parsing options"
		      (#\f "feature" (:arg "KEYWORD")
			   (list *features* 'keyword)
			   "Insert KEYWORD in *features* list.")
		      (#\s "subnet" (:arg "NET")
			   (list zone:*preferred-subnets*)
			   "Designate NET as a preferred subnet.")
		      (#\D "debug" (set opt-debug)
			   "Produce stack backtrace on error.")
		      "Output options"
		      (#\d "directory" (:arg "DIRECTORY")
			   (dir *zone-output-path*)
			   "Write zone and serial files to DIRECTORY.")
		      (#\F "format" (:arg "FORMAT")
			   (keyword opt-format
				    (delete-duplicates
				     (loop for method in
					   (generic-function-methods
					    #'zone:zone-write)
					   for specs =
					   (method-specializers method)
					   if (typep (car specs)
						     'eql-specializer)
					   collect
					   (eql-specializer-object
					    (car specs)))))
			   "Format to use for output.")
		      (#\z "zone" (:arg "NAME") (list opt-zones)
			   "Write information about zone NAME.")))

(defun main ()
  (set-command-line-arguments)
  (let ((files nil))
    (flet ((run ()
	     (dolist (f files)
	       (let ((*package* (make-package "ZONE.SCRATCH"
					      :use '(#:common-lisp
						     #:net #:zone))))
		 (load f :verbose nil :print nil :if-does-not-exist :error)
		 (delete-package *package*)))
	     (zone-save opt-zones :format opt-format)))
      (with-unix-error-reporting ()
	(unless (option-parse-try
		  (do-options ()
		    (nil (rest)
			 (when (zerop (length rest))
			   (option-parse-error "no files to read"))
			 (setf files rest))))
	  (die-usage)))
      (if opt-debug
	  (run)
	  (with-unix-error-reporting () (run))))))

;;;----- That's all, folks --------------------------------------------------