;;;
;;; gauche.package.fetch - fetch a package
;;;  
;;;   Copyright (c) 2004-2007  Shiro Kawai  <shiro@acm.org>
;;;   
;;;   Redistribution and use in source and binary forms, with or without
;;;   modification, are permitted provided that the following conditions
;;;   are met:
;;;   
;;;   1. Redistributions of source code must retain the above copyright
;;;      notice, this list of conditions and the following disclaimer.
;;;  
;;;   2. Redistributions in binary form must reproduce the above copyright
;;;      notice, this list of conditions and the following disclaimer in the
;;;      documentation and/or other materials provided with the distribution.
;;;  
;;;   3. Neither the name of the authors nor the names of its contributors
;;;      may be used to endorse or promote products derived from this
;;;      software without specific prior written permission.
;;;  
;;;   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;;;   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;;;   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
;;;   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
;;;   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;;;   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
;;;   TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;;;   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;;;   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;;   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;;   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;  
;;;  $Id: fetch.scm,v 1.7 2007/03/02 07:39:09 shirok Exp $
;;;

;; *EXPERIMENTAL*
;; gauche.package.fetch module is intended to automate fetching package
;; distribution from the Net.
;;
;; Eventually this module should take care of fetching a list of
;; available packages, and maintaining downloaded package cache.
;; For now, what this does is just to download tarball from the net
;; if it is specified by http or ftp url.

(define-module gauche.package.fetch
  (use rfc.uri)
  (use file.util)
  (use util.list)
  (use gauche.package.util)
  (use gauche.parameter)
  (export gauche-package-ensure))
(select-module gauche.package.fetch)

;; Default programs
(define *wget-program*     (find-file-in-paths "wget"))
(define *ncftpget-program* (find-file-in-paths "ncftpget"))

(define (gauche-package-ensure uri . opts)
  (let-keywords opts ((config '()))
    (let* ((build-dir (assq-ref config 'build-dir "."))
           (wget      (assq-ref config 'wget *wget-program*))
           (ncftpget  (assq-ref config 'ncftpget *ncftpget-program*))
           (dest      (build-path build-dir (sys-basename uri))))
      (rxmatch-case uri
        (#/^https?:/ (#f)
         (sys-unlink dest)
         (run #`",wget -P \",build-dir\" \",uri\"")
         dest)
        (#/^ftp:/ (#f)
         (guard (e (else (sys-unlink dest) (raise e)))
           (run #`",ncftpget -c \",uri\" > \",dest\""))
         dest)
        (else
         (unless (file-is-readable? uri)
           (error "can't read the package: " uri))
         uri)))))

(provide "gauche/package/fetch")
