1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2015, 2016, 2017 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 scripts)
#:use-module (guix store)
#:use-module (guix hash)
#:use-module (guix base16)
#:use-module (guix base32)
#:use-module ((guix download) #:hide (url-fetch))
#:use-module ((guix build download)
#:select (url-fetch current-terminal-columns))
#:use-module ((guix build syscalls)
#:select (terminal-columns))
#:use-module (web uri)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 binary-ports)
#:export (guix-download))
\f
;;;
;;; Command-line options.
;;;
(define (download-to-file url file)
"Download the file at URI to FILE. Return FILE."
(let ((uri (string->uri url)))
(match (uri-scheme uri)
((or 'file #f)
(copy-file (uri-path uri) file))
(_
(url-fetch url file)))
file))
(define* (download-to-store* url #:key (verify-certificate? #t))
(with-store store
(download-to-store store url
#:verify-certificate? verify-certificate?)))
(define %default-options
;; Alist of default option values.
`((format . ,bytevector->nix-base32-string)
(verify-certificate? . #t)
(download-proc . ,download-to-store*)))
(define (show-help)
(display (G_ "Usage: guix download [OPTION] URL
Download the file at URL to the store or to the given file, and print its
file name 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 (G_ "
-f, --format=FMT write the hash in the given format"))
(format #t (G_ "
--no-check-certificate
do not validate the certificate of HTTPS servers "))
(format #f (G_ "
-o, --output=FILE download to FILE"))
(newline)
(display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-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 (G_ "unsupported hash format: ~a~%") arg))))
(alist-cons 'format fmt-proc
(alist-delete 'format result))))
(option '("no-check-certificate") #f #f
(lambda (opt name arg result)
(alist-cons 'verify-certificate? #f result)))
(option '(#\o "output") #t #f
(lambda (opt name arg result)
(alist-cons 'download-proc
(lambda* (url #:key verify-certificate?)
(download-to-file url arg))
(alist-delete 'download 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")))))
\f
;;;
;;; 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 (G_ "~A: unrecognized option~%") name))
(lambda (arg result)
(when (assq 'argument result)
(leave (G_ "~A: extraneous argument~%") arg))
(alist-cons 'argument arg result))
%default-options))
(with-error-handling
(let* ((opts (parse-options))
(arg (or (assq-ref opts 'argument)
(leave (G_ "no download URI was specified~%"))))
(uri (or (string->uri arg)
(false-if-exception
(string->uri
(string-append "file://" (canonicalize-path arg))))
(leave (G_ "~a: failed to parse URI~%")
arg)))
(fetch (assq-ref opts 'download-proc))
(path (parameterize ((current-terminal-columns
(terminal-columns)))
(fetch (uri->string uri)
#:verify-certificate?
(assq-ref opts 'verify-certificate?))))
(hash (call-with-input-file
(or path
(leave (G_ "~a: download failed~%")
arg))
port-sha256))
(fmt (assq-ref opts 'format)))
(format #t "~a~%~a~%" path (fmt hash))
#t)))
|