#!/bin/sh
# -*- scheme -*-
exec ${GUILE-guile} -e '(@ (scripts compile) compile)' -s $0 "$@"
!#
;;; Compile --- Command-line Guile Scheme compiler

;; Copyright 2005,2008,2009 Free Software Foundation, Inc.
;;
;; 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, 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 software; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301 USA

;;; Author: Ludovic Courtès <ludo@gnu.org>
;;; Author: Andy Wingo <wingo@pobox.com>

;;; Commentary:

;; Usage: compile [ARGS]
;;
;; PROGRAM does something.
;;
;; TODO: Write it!

;;; Code:

(define-module (scripts compile)
  #:use-module ((system base compile) #:select (compile-file))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-13)
  #:use-module (srfi srfi-37)
  #:export (compile))


(define (fail . messages)
  (format (current-error-port)
	  (string-concatenate `("error: " ,@messages "~%")))
  (exit 1))

(define %options
  ;; Specifications of the command-line options.
  (list (option '(#\h "help") #f #f
                (lambda (opt name arg result)
		  (alist-cons 'help? #t result)))

	(option '(#\L "load-path") #t #f
		(lambda (opt name arg result)
		  (let ((load-path (assoc-ref result 'load-path)))
		    (alist-cons 'load-path (cons arg load-path)
				result))))
	(option '(#\o "output") #t #f
		(lambda (opt name arg result)
		  (if (assoc-ref result 'output-file)
		      (fail "`-o' option cannot be specified more than once")
		      (alist-cons 'output-file arg result))))

	(option '(#\O "optimize") #f #f
		(lambda (opt name arg result)
		  (alist-cons 'optimize? #t result)))
	(option '(#\e "expand-only") #f #f
		(lambda (opt name arg result)
		  (alist-cons 'expand-only? #t result)))
	(option '(#\t "translate-only") #f #f
		(lambda (opt name arg result)
		  (alist-cons 'translate-only? #t result)))
	(option '(#\c "compile-only") #f #f
		(lambda (opt name arg result)
		  (alist-cons 'compile-only? #t result)))))

(define (parse-args args)
  "Parse argument list @var{args} and return an alist with all the relevant
options."
  (args-fold args %options
             (lambda (opt name arg result)
               (format (current-error-port) "~A: unrecognized option" opt)
	       (exit 1))
             (lambda (file result)
	       (let ((input-files (assoc-ref result 'input-files)))
		 (alist-cons 'input-files (cons file input-files)
			     result)))

	     ;; default option values
             '((input-files)
	       (load-path))))


(define (compile args)
  (let* ((options         (parse-args (cdr args)))
         (help?           (assoc-ref options 'help?))
         (optimize?       (assoc-ref options 'optimize?))
         (expand-only?    (assoc-ref options 'expand-only?))
         (translate-only? (assoc-ref options 'translate-only?))
         (compile-only?   (assoc-ref options 'compile-only?))
	 (input-files     (assoc-ref options 'input-files))
	 (output-file     (assoc-ref options 'output-file))
	 (load-path       (assoc-ref options 'load-path)))
    (if (or help? (null? input-files))
        (begin
          (format #t "Usage: compile [OPTION] FILE...
Compile each Guile Scheme source file FILE into a Guile object.

  -h, --help           print this help message

  -L, --load-path=DIR  add DIR to the front of the module load path
  -o, --output=OFILE   write output to OFILE

  -O, --optimize       turn on optimizations
  -e, --expand-only    only go through the code expansion stage
  -t, --translate-only stop after the translation to GHIL
  -c, --compile-only   stop after the compilation to GLIL

Report bugs to <guile-user@gnu.org>.~%")
          (exit 0)))

    (set! %load-path (append load-path %load-path))

    (let ((compile-opts (append (if optimize? '(#:O) '())
                                (if expand-only? '(#:e) '())
                                (if translate-only? '(#:t) '())
                                (if compile-only? '(#:c) '()))))
      (if output-file
	  (if (and (not (null? input-files))
		   (null? (cdr input-files)))
	      (compile-file (car input-files) output-file)
	      (fail "`-o' option can only be specified "
		    "when compiling a single file"))
	  (for-each (lambda (file)
		      (apply compile-file file compile-opts))
		    input-files)))))

;;; Local Variables:
;;; coding: latin-1
;;; End: