;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; ;;; GNU Guix 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 3 of the License, or (at ;;; your option) any later version. ;;; ;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>. (define-module (guix scripts download) #:use-module (guix ui) #:use-module (guix store) #:use-module (guix hash) #:use-module (guix utils) #:use-module (guix base32) #:use-module (guix download) #:use-module (web uri) #:use-module (ice-9 match) #:use-module (srfi srfi-1) #:use-module (srfi srfi-37) #:use-module (rnrs bytevectors) #:use-module (rnrs io ports) #:export (guix-download)) ;;; ;;; Command-line options. ;;; (define %default-options ;; Alist of default option values. `((format . ,bytevector->nix-base32-string))) (define (show-help) (display (_ "Usage: guix download [OPTION] URL Download the file at URL, add it to the store, and print its store path and the hash of its contents. Supported formats: 'nix-base32' (default), 'base32', and 'base16' ('hex' and 'hexadecimal' can be used as well).\n")) (format #t (_ " -f, --format=FMT write the hash in the given format")) (newline) (display (_ " -h, --help display this help and exit")) (display (_ " -V, --version display version information and exit")) (newline) (show-bug-report-information)) (define %options ;; Specifications of the command-line options. (list (option '(#\f "format") #t #f (lambda (opt name arg result) (define fmt-proc (match arg ("nix-base32" bytevector->nix-base32-string) ("base32" bytevector->base32-string) ((or "base16" "hex" "hexadecimal") bytevector->base16-string) (x (leave (_ "unsupported hash format: ~a~%") arg)))) (alist-cons 'format fmt-proc (alist-delete 'format result)))) (option '(#\h "help") #f #f (lambda args (show-help) (exit 0))) (option '(#\V "version") #f #f (lambda args (show-version-and-exit "guix download"))))) ;;; ;;; Entry point. ;;; (define (guix-download . args) (define (parse-options) ;; Return the alist of option values. (args-fold* args %options (lambda (opt name arg result) (leave (_ "~A: unrecognized option~%") name)) (lambda (arg result) (alist-cons 'argument arg result)) %default-options)) (with-error-handling (let* ((opts (parse-options)) (store (open-connection)) (arg (assq-ref opts 'argument)) (uri (or (string->uri arg) (leave (_ "~a: failed to parse URI~%") arg))) (path (case (uri-scheme uri) ((file) (add-to-store store (basename (uri-path uri)) #f "sha256" (uri-path uri))) (else (download-to-store store (uri->string uri) (basename (uri-path uri)))))) (hash (call-with-input-file (or path (leave (_ "~a: download failed~%") arg)) port-sha256)) (fmt (assq-ref opts 'format))) (format #t "~a~%~a~%" path (fmt hash)) #t)))