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
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Konrad Hinsen <konrad.hinsen@fastmail.net>
;;; Copyright © 2019, 2020 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 time-machine)
#:use-module (guix ui)
#:use-module (guix scripts)
#:use-module (guix inferior)
#:use-module (guix channels)
#:use-module (guix store)
#:use-module (guix status)
#:use-module ((guix git)
#:select (with-git-error-handling))
#:use-module ((guix utils)
#:select (%current-system))
#:use-module ((guix scripts pull)
#:select (channel-list))
#:use-module ((guix scripts build)
#:select (%standard-build-options
show-build-options-help
set-build-options-from-command-line))
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:export (guix-time-machine))
\f
;;;
;;; Command-line options.
;;;
(define (show-help)
(display (G_ "Usage: guix time-machine [OPTION] -- COMMAND ARGS...
Execute COMMAND ARGS... in an older version of Guix.\n"))
(display (G_ "
-C, --channels=FILE deploy the channels defined in FILE"))
(display (G_ "
--url=URL use the Git repository at URL"))
(display (G_ "
--commit=COMMIT use the specified COMMIT"))
(display (G_ "
--branch=BRANCH use the tip of the specified BRANCH"))
(display (G_ "
--disable-authentication
disable channel authentication"))
(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 '(#\C "channels") #t #f
(lambda (opt name arg result)
(alist-cons 'channel-file arg result)))
(option '("url") #t #f
(lambda (opt name arg result)
(alist-cons 'repository-url arg
(alist-delete 'repository-url result))))
(option '("commit") #t #f
(lambda (opt name arg result)
(alist-cons 'ref `(commit . ,arg) result)))
(option '("branch") #t #f
(lambda (opt name arg result)
(alist-cons 'ref `(branch . ,arg) result)))
(option '("disable-authentication") #f #f
(lambda (opt name arg result)
(alist-cons 'authenticate-channels? #f result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix time-machine")))
%standard-build-options))
(define %default-options
;; Alist of default option values.
`((system . ,(%current-system))
(substitutes? . #t)
(offload? . #t)
(print-build-trace? . #t)
(print-extended-build-trace? . #t)
(multiplexed-build-output? . #t)
(authenticate-channels? . #t)
(graft? . #t)
(debug . 0)
(verbosity . 1)))
(define (parse-args args)
"Parse the list of command line arguments ARGS."
;; The '--' token is used to separate the command to run from the rest of
;; the operands.
(let-values (((args command) (break (cut string=? "--" <>) args)))
(let ((opts (parse-command-line args %options
(list %default-options))))
(match command
(() opts)
(("--") opts)
(("--" command ...) (alist-cons 'exec command opts))))))
\f
;;;
;;; Entry point.
;;;
(define (guix-time-machine . args)
(with-error-handling
(with-git-error-handling
(let* ((opts (parse-args args))
(channels (channel-list opts))
(command-line (assoc-ref opts 'exec))
(authenticate? (assoc-ref opts 'authenticate-channels?)))
(when command-line
(let* ((directory
(with-store store
(with-status-verbosity (assoc-ref opts 'verbosity)
(set-build-options-from-command-line store opts)
(cached-channel-instance store channels
#:authenticate? authenticate?))))
(executable (string-append directory "/bin/guix")))
(apply execl (cons* executable executable command-line))))))))
|