blob: 9bc5a1962ed7b99ef888d792f2eddd29ab689bc2 (
plain) (
blame)
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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
;;; 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 (test-nar)
#:use-module (guix nar)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (ice-9 ftw)
#:use-module (ice-9 match))
;; Test the (guix nar) module.
;;;
;;; File system testing tools, initially contributed to Guile, then libchop.
;;;
(define (random-file-size)
(define %average (* 1024 512)) ; 512 KiB
(define %stddev (* 1024 64)) ; 64 KiB
(inexact->exact
(max 0 (round (+ %average (* %stddev (random:normal)))))))
(define (make-file-tree dir tree)
"Make file system TREE at DIR."
(let loop ((dir dir)
(tree tree))
(define (scope file)
(string-append dir "/" file))
(match tree
(('directory name (body ...))
(mkdir (scope name))
(for-each (cute loop (scope name) <>) body))
(('directory name (? integer? mode) (body ...))
(mkdir (scope name))
(for-each (cute loop (scope name) <>) body)
(chmod (scope name) mode))
((file)
(populate-file (scope file) (random-file-size)))
((file (? integer? mode))
(populate-file (scope file) (random-file-size))
(chmod (scope file) mode))
((from '-> to)
(symlink to (scope from))))))
(define (delete-file-tree dir tree)
"Delete file TREE from DIR."
(let loop ((dir dir)
(tree tree))
(define (scope file)
(string-append dir "/" file))
(match tree
(('directory name (body ...))
(for-each (cute loop (scope name) <>) body)
(rmdir (scope name)))
(('directory name (? integer? mode) (body ...))
(chmod (scope name) #o755) ; make sure it can be entered
(for-each (cute loop (scope name) <>) body)
(rmdir (scope name)))
((from '-> _)
(delete-file (scope from)))
((file _ ...)
(delete-file (scope file))))))
(define-syntax-rule (with-file-tree dir tree body ...)
(dynamic-wind
(lambda ()
(make-file-tree dir 'tree))
(lambda ()
body ...)
(lambda ()
(delete-file-tree dir 'tree))))
(define (file-tree-equal? input output)
"Return #t if the file trees at INPUT and OUTPUT are equal."
(define strip
(cute string-drop <> (string-length input)))
(define sibling
(compose (cut string-append output <>) strip))
(define (file=? a b)
(and (eq? (stat:type (lstat a)) (stat:type (lstat b)))
(case (stat:type (lstat a))
((regular)
(equal?
(call-with-input-file a get-bytevector-all)
(call-with-input-file b get-bytevector-all)))
((symlink)
(string=? (readlink a) (readlink b)))
(else
(error "what?" (lstat a))))))
(file-system-fold (const #t)
(lambda (name stat result) ; leaf
(and result
(file=? name (sibling name))))
(lambda (name stat result) ; down
result)
(lambda (name stat result) ; up
result)
(const #f) ; skip
(lambda (name stat errno result)
(pk 'error name stat errno)
#f)
(> (stat:nlink (stat output)) 2)
input
lstat))
(define (make-random-bytevector n)
(let ((bv (make-bytevector n)))
(let loop ((i 0))
(if (< i n)
(begin
(bytevector-u8-set! bv i (random 256))
(loop (1+ i)))
bv))))
(define (populate-file file size)
(call-with-output-file file
(lambda (p)
(put-bytevector p (make-random-bytevector size)))))
(define (rm-rf dir)
(file-system-fold (const #t) ; enter?
(lambda (file stat result) ; leaf
(delete-file file))
(const #t) ; down
(lambda (dir stat result) ; up
(rmdir dir))
(const #t) ; skip
(const #t) ; error
#t
dir
lstat))
(define %test-dir
;; An output directory under $top_builddir.
(string-append (dirname (search-path %load-path "configure"))
"/test-nar-" (number->string (getpid))))
(test-begin "nar")
(test-assert "write-file + restore-file"
(let* ((input (string-append (dirname (search-path %load-path "guix.scm"))
"/guix"))
(output %test-dir)
(nar (string-append output ".nar")))
(dynamic-wind
(lambda () #t)
(lambda ()
(call-with-output-file nar
(cut write-file input <>))
(call-with-input-file nar
(cut restore-file <> output))
(file-tree-equal? input output))
(lambda ()
(false-if-exception (delete-file nar))
(false-if-exception (rm-rf output))))))
(test-assert "write-file + restore-file with symlinks"
(let ((input (string-append %test-dir ".input")))
(mkdir input)
(dynamic-wind
(const #t)
(lambda ()
(with-file-tree input
(directory "root"
(("reg") ("exe" #o777) ("sym" -> "reg")))
(let* ((output %test-dir)
(nar (string-append output ".nar")))
(dynamic-wind
(lambda () #t)
(lambda ()
(call-with-output-file nar
(cut write-file input <>))
(call-with-input-file nar
(cut restore-file <> output))
(file-tree-equal? input output))
(lambda ()
(false-if-exception (delete-file nar))
(false-if-exception (rm-rf output)))))))
(lambda ()
(rmdir input)))))
(test-end "nar")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
;;; Local Variables:
;;; eval: (put 'with-file-tree 'scheme-indent-function 2)
;;; End:
|
