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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Mathieu Lirzin <mthl@gnu.org>
;;; Copyright © 2017 Christopher Baines <mail@cbaines.net>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;; Copyright © 2020 Hartmut Goebel <h.goebel@crazy-compilers.com>
;;;
;;; 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 extracting-download)
#:use-module (ice-9 match)
#:use-module (ice-9 popen)
#:use-module ((guix build download) #:prefix build:)
#:use-module ((guix build utils) #:hide (delete))
#:use-module (guix gexp)
#:use-module (guix modules)
#:use-module (guix monads)
#:use-module (guix packages) ;; for %current-system
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (srfi srfi-26)
#:export (http-fetch/extract
download-to-store/extract))
;;;
;;; Produce fixed-output derivations with data extracted from n archive
;;; fetched over HTTP or FTP.
;;;
;;; This is meant to be used for package repositories where the actual source
;;; archive is packed into another archive, eventually carrying meta-data.
;;; Using this derivation saves both storing the outer archive and extracting
;;; the actual one at build time. The hash is calculated on the actual
;;; archive to ease validating the stored file.
;;;
(define* (http-fetch/extract url filename-to-extract hash-algo hash
#:optional name
#:key (system (%current-system)) (guile (default-guile)))
"Return a fixed-output derivation that fetches an archive at URL, and
extracts FILE_TO_EXTRACT from the archive. The FILE_TO_EXTRACT is expected to
have hash HASH of type HASH-ALGO (a symbol). By default, the file name is the
base name of URL; optionally, NAME can specify a different file name."
(define file-name
(match url
((head _ ...)
(basename head))
(_
(basename url))))
(define guile-zlib
(module-ref (resolve-interface '(gnu packages guile)) 'guile-zlib))
(define guile-json
(module-ref (resolve-interface '(gnu packages guile)) 'guile-json-4))
(define gnutls
(module-ref (resolve-interface '(gnu packages tls)) 'gnutls))
(define inputs
`(("tar" ,(module-ref (resolve-interface '(gnu packages base))
'tar))))
(define config.scm
(scheme-file "config.scm"
#~(begin
(define-module (guix config)
#:export (%system))
(define %system
#$(%current-system)))))
(define modules
(cons `((guix config) => ,config.scm)
(delete '(guix config)
(source-module-closure '((guix build download)
(guix build utils)
(guix utils)
(web uri))))))
(define build
(with-imported-modules modules
(with-extensions (list guile-json gnutls ;for (guix swh)
guile-zlib)
#~(begin
(use-modules (guix build download)
(guix build utils)
(guix utils)
(web uri)
(ice-9 match)
(ice-9 popen))
;; The code below expects tar to be in $PATH.
(set-path-environment-variable "PATH" '("bin")
(match '#+inputs
(((names dirs outputs ...) ...)
dirs)))
(setvbuf (current-output-port) 'line)
(setvbuf (current-error-port) 'line)
(call-with-temporary-directory
(lambda (directory)
;; TODO: Support different archive types, based on content-type
;; or archive name extention.
(let* ((file-to-extract (getenv "extract filename"))
(port (http-fetch (string->uri (getenv "download url"))
#:verify-certificate? #f))
(tar (open-pipe* OPEN_WRITE "tar" "-C" directory
"-xf" "-" file-to-extract)))
(dump-port port tar)
(close-port port)
(let ((status (close-pipe tar)))
(unless (zero? status)
(error "tar extraction failure" status)))
(copy-file (string-append directory "/"
(getenv "extract filename"))
#$output))))))))
(mlet %store-monad ((guile (package->derivation guile system)))
(gexp->derivation (or name file-name) build
;; Use environment variables and a fixed script name so
;; there's only one script in store for all the
;; downloads.
#:script-name "extract-download"
#:env-vars
`(("download url" . ,url)
("extract filename" . ,filename-to-extract))
#:leaked-env-vars '("http_proxy" "https_proxy"
"LC_ALL" "LC_MESSAGES" "LANG"
"COLUMNS")
#:system system
#:local-build? #t ; don't offload download
#:hash-algo hash-algo
#:hash hash
#:guile-for-build guile)))
(define* (download-to-store/extract store url filename-to-extract
#:optional (name (basename url))
#:key (log (current-error-port))
(verify-certificate? #t))
"Download an archive from URL, and extracts FILE_TO_EXTRACT from the archive
to STORE, either under NAME or URL's basename if omitted. Write progress
reports to LOG. VERIFY-CERTIFICATE? determines whether or not to validate
HTTPS server certificates."
(call-with-temporary-output-file
(lambda (temp port)
(let ((result
(parameterize ((current-output-port log))
(build:url-fetch url temp
;;#:mirrors %mirrors
#:verify-certificate?
verify-certificate?))))
(close port)
(and result
(call-with-temporary-output-file
(lambda (contents port)
(let ((tar (open-pipe* OPEN_READ
"tar" ;"--auto-compress"
"-xf" temp "--to-stdout" filename-to-extract)))
(dump-port tar port)
(close-port port)
(let ((status (close-pipe tar)))
(unless (zero? status)
(error "tar extraction failure" status)))
(add-to-store store name #f "sha256" contents)))))))))
|
