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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 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 copy)
#:use-module (guix ui)
#:use-module (guix scripts)
#:use-module (guix ssh)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix derivations)
#:use-module (guix scripts build)
#:use-module ((guix scripts archive) #:select (options->derivations+files))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:export (guix-copy))
;;;
;;; Exchanging store items over SSH.
;;;
(define (ssh-spec->user+host+port spec)
"Parse SPEC, a string like \"user@host:port\" or just \"host\", and return
three values: the user name (or #f), the host name, and the TCP port
number (or #f) corresponding to SPEC."
(define tokens
(char-set #\@ #\:))
(match (string-tokenize spec (char-set-complement tokens))
((host)
(values #f host #f))
((left right)
(if (string-index spec #\@)
(values left right #f)
(values #f left (string->number right))))
((user host port)
(match (string->number port)
((? integer? port)
(values user host port))
(x
(leave (G_ "~a: invalid TCP port number~%") port))))
(x
(leave (G_ "~a: invalid SSH specification~%") spec))))
(define (send-to-remote-host target opts)
"Send ITEMS to TARGET. ITEMS is a list of store items or package names; for ;
package names, build the underlying packages before sending them."
(with-store local
(set-build-options-from-command-line local opts)
(let-values (((user host port)
(ssh-spec->user+host+port target))
((drv items)
(options->derivations+files local opts)))
(show-what-to-build local drv
#:use-substitutes? (assoc-ref opts 'substitutes?)
#:dry-run? (assoc-ref opts 'dry-run?))
(and (or (assoc-ref opts 'dry-run?)
(build-derivations local drv))
(let* ((session (open-ssh-session host #:user user
#:port (or port 22)))
(sent (send-files local items
(connect-to-remote-daemon session)
#:recursive? #t)))
(format #t "~{~a~%~}" sent)
sent)))))
(define (retrieve-from-remote-host source opts)
"Retrieve ITEMS from SOURCE."
(with-store local
(let*-values (((user host port)
(ssh-spec->user+host+port source))
((session)
(open-ssh-session host #:user user #:port (or port 22)))
((remote)
(connect-to-remote-daemon session)))
(set-build-options-from-command-line local opts)
;; TODO: Here we could to compute and build the derivations on REMOTE
;; rather than on LOCAL (one-off offloading) but that is currently too
;; slow due to the many RPC round trips. So we just assume that REMOTE
;; contains ITEMS.
(let*-values (((drv items)
(options->derivations+files local opts))
((retrieved)
(retrieve-files local items remote #:recursive? #t)))
(format #t "~{~a~%~}" retrieved)
retrieved))))
;;;
;;; Options.
;;;
(define (show-help)
(display (G_ "Usage: guix copy [OPTION]... ITEMS...
Copy ITEMS to or from the specified host over SSH.\n"))
(display (G_ "
--to=HOST send ITEMS to HOST"))
(display (G_ "
--from=HOST receive ITEMS from HOST"))
(newline)
(show-build-options-help)
(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.
(cons* (option '("to") #t #f
(lambda (opt name arg result)
(alist-cons 'destination arg result)))
(option '("from") #t #f
(lambda (opt name arg result)
(alist-cons 'source arg result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix copy")))
(option '(#\s "system") #t #f
(lambda (opt name arg result)
(alist-cons 'system arg
(alist-delete 'system result eq?))))
%standard-build-options))
(define %default-options
`((system . ,(%current-system))
(substitutes? . #t)
(graft? . #t)
(verbosity . 0)))
;;;
;;; Entry point.
;;;
(define (guix-copy . args)
(with-error-handling
(let* ((opts (parse-command-line args %options (list %default-options)))
(source (assoc-ref opts 'source))
(target (assoc-ref opts 'destination)))
(cond (target (send-to-remote-host target opts))
(source (retrieve-from-remote-host source opts))
(else (leave (G_ "use '--to' or '--from'~%")))))))
|