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
| | ;;; 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 guix-gc)
#:use-module (guix ui)
#:use-module (guix store)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:export (guix-gc))
\f
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
`((action . collect-garbage)))
(define (show-help)
(display (_ "Usage: guix-gc [OPTION]... PATHS...
Invoke the garbage collector.\n"))
(display (_ "
-C, --collect-garbage[=MIN]
collect at least MIN bytes of garbage"))
(display (_ "
-d, --delete attempt to delete PATHS"))
(display (_ "
--list-dead list dead paths"))
(display (_ "
--list-live list live paths"))
(newline)
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define (size->number str)
"Convert STR, a storage measurement representation such as \"1024\" or
\"1MiB\", to a number of bytes. Raise an error if STR could not be
interpreted."
(define unit-pos
(string-rindex str char-set:digit))
(define unit
(and unit-pos (substring str (+ 1 unit-pos))))
(let* ((numstr (if unit-pos
(substring str 0 (+ 1 unit-pos))
str))
(num (string->number numstr)))
(if num
(* num
(match unit
("KiB" (expt 2 10))
("MiB" (expt 2 20))
("GiB" (expt 2 30))
("TiB" (expt 2 40))
("KB" (expt 10 3))
("MB" (expt 10 6))
("GB" (expt 10 9))
("TB" (expt 10 12))
("" 1)
(_
(format (current-error-port) (_ "error: unknown unit: ~a~%")
unit)
(exit 1))))
(begin
(format (current-error-port)
(_ "error: invalid number: ~a") numstr)
(exit 1)))))
(define %options
;; Specification of the command-line options.
(list (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix-gc")))
(option '(#\C "collect-garbage") #f #t
(lambda (opt name arg result)
(let ((result (alist-cons 'action 'collect-garbage
(alist-delete 'action result))))
(match arg
((? string?)
(let ((amount (size->number arg)))
(if arg
(alist-cons 'min-freed amount result)
(begin
(format (current-error-port)
(_ "error: invalid amount of storage: ~a~%")
arg)
(exit 1)))))
(#f result)))))
(option '(#\d "delete") #f #f
(lambda (opt name arg result)
(alist-cons 'action 'delete
(alist-delete 'action result))))
(option '("list-dead") #f #f
(lambda (opt name arg result)
(alist-cons 'action 'list-dead
(alist-delete 'action result))))
(option '("list-live") #f #f
(lambda (opt name arg result)
(alist-cons 'action 'list-live
(alist-delete 'action result))))))
\f
;;;
;;; Entry point.
;;;
(define (guix-gc . 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))
(install-locale)
(textdomain "guix")
(setvbuf (current-output-port) _IOLBF)
(setvbuf (current-error-port) _IOLBF)
(with-error-handling
(let ((opts (parse-options))
(store (open-connection)))
(case (assoc-ref opts 'action)
((collect-garbage)
(let ((min-freed (assoc-ref opts 'min-freed)))
(if min-freed
(collect-garbage store min-freed)
(collect-garbage store))))
((delete)
(let ((paths (filter-map (match-lambda
(('argument . arg) arg)
(_ #f))
opts)))
(delete-paths store paths)))
((list-dead)
(for-each (cut simple-format #t "~a~%" <>)
(dead-paths store)))
((list-live)
(for-each (cut simple-format #t "~a~%" <>)
(live-paths store)))))))
|