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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2017, 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 (test-challenge)
#:use-module (guix tests)
#:use-module (guix tests http)
#:use-module ((gcrypt hash) #:prefix gcrypt:)
#:use-module (guix store)
#:use-module (guix monads)
#:use-module (guix derivations)
#:use-module (guix serialization)
#:use-module (guix packages)
#:use-module (guix gexp)
#:use-module (guix base32)
#:use-module (guix scripts challenge)
#:use-module (guix scripts substitute)
#:use-module ((guix build utils) #:select (find-files))
#:use-module (gnu packages bootstrap)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
(define query-path-hash*
(store-lift query-path-hash))
(define (query-path-size item)
(mlet %store-monad ((info (query-path-info* item)))
(return (path-info-nar-size info))))
(define* (call-with-derivation-narinfo* drv thunk hash)
(lambda (store)
(with-derivation-narinfo drv (sha256 => hash)
(values (run-with-store store (thunk)) store))))
(define-syntax with-derivation-narinfo*
(syntax-rules (sha256 =>)
((_ drv (sha256 => hash) body ...)
(call-with-derivation-narinfo* drv
(lambda () body ...)
hash))))
(test-begin "challenge")
(test-assertm "no discrepancies"
(let ((text (random-text)))
(mlet* %store-monad ((drv (gexp->derivation "something"
#~(call-with-output-file
#$output
(lambda (port)
(display #$text port)))))
(out -> (derivation->output-path drv)))
(mbegin %store-monad
(built-derivations (list drv))
(mlet %store-monad ((hash (query-path-hash* out)))
(with-derivation-narinfo* drv (sha256 => hash)
(>>= (compare-contents (list out) (%test-substitute-urls))
(match-lambda
((report)
(return
(and (string=? out (comparison-report-item report))
(bytevector=?
(comparison-report-local-sha256 report)
hash)
(comparison-report-match? report))))))))))))
(test-assertm "one discrepancy"
(let ((text (random-text)))
(mlet* %store-monad ((drv (gexp->derivation "something"
#~(call-with-output-file
#$output
(lambda (port)
(display #$text port)))))
(out -> (derivation->output-path drv)))
(mbegin %store-monad
(built-derivations (list drv))
(mlet* %store-monad ((hash (query-path-hash* out))
(wrong-hash
-> (let* ((w (bytevector-copy hash))
(b (bytevector-u8-ref w 0)))
(bytevector-u8-set! w 0
(modulo (+ b 1) 128))
w)))
(with-derivation-narinfo* drv (sha256 => wrong-hash)
(>>= (compare-contents (list out) (%test-substitute-urls))
(match-lambda
((report)
(return
(and (string=? out (comparison-report-item (pk report)))
(eq? 'mismatch (comparison-report-result report))
(bytevector=? hash
(comparison-report-local-sha256
report))
(match (comparison-report-narinfos report)
((bad)
(bytevector=? wrong-hash
(narinfo-hash->sha256
(narinfo-hash bad))))))))))))))))
(test-assertm "inconclusive: no substitutes"
(mlet* %store-monad ((drv (gexp->derivation "foo" #~(mkdir #$output)))
(out -> (derivation->output-path drv))
(_ (built-derivations (list drv)))
(hash (query-path-hash* out)))
(>>= (compare-contents (list out) (%test-substitute-urls))
(match-lambda
((report)
(return
(and (string=? out (comparison-report-item report))
(comparison-report-inconclusive? report)
(null? (comparison-report-narinfos report))
(bytevector=? (comparison-report-local-sha256 report)
hash))))))))
(test-assertm "inconclusive: no local build"
(let ((text (random-text)))
(mlet* %store-monad ((drv (gexp->derivation "something"
#~(list #$output #$text)))
(out -> (derivation->output-path drv))
(hash -> (gcrypt:sha256 #vu8())))
(with-derivation-narinfo* drv (sha256 => hash)
(>>= (compare-contents (list out) (%test-substitute-urls))
(match-lambda
((report)
(return
(and (string=? out (comparison-report-item report))
(comparison-report-inconclusive? report)
(not (comparison-report-local-sha256 report))
(match (comparison-report-narinfos report)
((narinfo)
(bytevector=? (narinfo-hash->sha256
(narinfo-hash narinfo))
hash))))))))))))
(define (make-narinfo item size hash)
(format #f "StorePath: ~a
Compression: none
URL: nar/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo
NarSize: ~d
NarHash: sha256:~a
References: ~%" item size (bytevector->nix-base32-string hash)))
(define (call-mismatch-test proc)
"Pass PROC a <comparison-report> for a mismatch and return its return
value."
;; Pretend we have two different results for the same store item, ITEM, with
;; "/bin/guile" differing between the two nars.
(mlet* %store-monad
((drv1 (package->derivation %bootstrap-guile))
(drv2 (gexp->derivation
"broken-guile"
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils))
(copy-recursively #$drv1 #$output)
(chmod (string-append #$output "/bin/guile")
#o755)
(call-with-output-file (string-append
#$output
"/bin/guile")
(lambda (port)
(display "corrupt!" port)))))))
(out1 -> (derivation->output-path drv1))
(out2 -> (derivation->output-path drv2))
(item -> (string-append (%store-prefix) "/"
(bytevector->nix-base32-string
(random-bytevector 32))
"-foo"
(number->string (current-time) 16))))
(mbegin %store-monad
(built-derivations (list drv1 drv2))
(mlet* %store-monad ((size1 (query-path-size out1))
(size2 (query-path-size out2))
(hash1 (query-path-hash* out1))
(hash2 (query-path-hash* out2))
(nar1 -> (call-with-bytevector-output-port
(lambda (port)
(write-file out1 port))))
(nar2 -> (call-with-bytevector-output-port
(lambda (port)
(write-file out2 port)))))
(parameterize ((%http-server-port 9000))
(with-http-server `((200 ,(make-narinfo item size1 hash1))
(200 ,nar1))
(parameterize ((%http-server-port 9001))
(with-http-server `((200 ,(make-narinfo item size2 hash2))
(200 ,nar2))
(mlet* %store-monad ((urls -> (list (%local-url 9000)
(%local-url 9001)))
(reports (compare-contents (list item)
urls)))
(pk 'report reports)
(return (proc (car reports))))))))))))
(test-assertm "differing-files"
(call-mismatch-test
(lambda (report)
(equal? (differing-files report) '("/bin/guile")))))
(test-assertm "call-with-mismatches"
(call-mismatch-test
(lambda (report)
(call-with-mismatches
report
(lambda (directory1 directory2)
(let* ((files1 (find-files directory1))
(files2 (find-files directory2))
(files (map (cute string-drop <> (string-length directory1))
files1)))
(and (equal? files
(map (cute string-drop <> (string-length directory2))
files2))
(equal? (remove (lambda (file)
(file=? (string-append directory1 "/" file)
(string-append directory2 "/" file)))
files)
'("/bin/guile")))))))))
(test-end)
;;; Local Variables:
;;; eval: (put 'with-derivation-narinfo* 'scheme-indent-function 2)
;;; End:
|