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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 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 tests)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix packages)
#:use-module (guix base32)
#:use-module (gnu packages bootstrap)
#:use-module (srfi srfi-34)
#:use-module (rnrs bytevectors)
#:use-module (web uri)
#:export (open-connection-for-tests
random-text
random-bytevector
mock
with-derivation-narinfo
dummy-package))
;;; Commentary:
;;;
;;; This module provide shared infrastructure for the test suite. For
;;; internal use only.
;;;
;;; Code:
(define (open-connection-for-tests)
"Open a connection to the build daemon for tests purposes and return it."
(guard (c ((nix-error? c)
(format (current-error-port)
"warning: build daemon error: ~s~%" c)
#f))
(let ((store (open-connection)))
;; Make sure we build everything by ourselves.
(set-build-options store #:use-substitutes? #f)
;; Use the bootstrap Guile when running tests, so we don't end up
;; building everything in the temporary test store.
(%guile-for-build (package-derivation store %bootstrap-guile))
store)))
(define %seed
(seed->random-state (logxor (getpid) (car (gettimeofday)))))
(define (random-text)
"Return the hexadecimal representation of a random number."
(number->string (random (expt 2 256) %seed) 16))
(define (random-bytevector n)
"Return a random bytevector of N bytes."
(let ((bv (make-bytevector n)))
(let loop ((i 0))
(if (< i n)
(begin
(bytevector-u8-set! bv i (random 256 %seed))
(loop (1+ i)))
bv))))
(define-syntax-rule (mock (module proc replacement) body ...)
"Within BODY, replace the definition of PROC from MODULE with the definition
given by REPLACEMENT."
(let* ((m (resolve-module 'module))
(original (module-ref m 'proc)))
(dynamic-wind
(lambda () (module-set! m 'proc replacement))
(lambda () body ...)
(lambda () (module-set! m 'proc original)))))
;;;
;;; Narinfo files, as used by the substituter.
;;;
(define* (derivation-narinfo drv #:key (nar "example.nar")
(sha256 (make-bytevector 32 0)))
"Return the contents of the narinfo corresponding to DRV; NAR should be the
file name of the archive containing the substitute for DRV, and SHA256 is the
expected hash."
(format #f "StorePath: ~a
URL: ~a
Compression: none
NarSize: 1234
NarHash: sha256:~a
References:
System: ~a
Deriver: ~a~%"
(derivation->output-path drv) ; StorePath
nar ; URL
(bytevector->nix-base32-string sha256) ; NarHash
(derivation-system drv) ; System
(basename
(derivation-file-name drv)))) ; Deriver
(define* (call-with-derivation-narinfo drv thunk
#:key (sha256 (make-bytevector 32 0)))
"Call THUNK in a context where fake substituter data, as read by 'guix
substitute-binary', has been installed for DRV. SHA256 is the hash of the
expected output of DRV."
(let* ((output (derivation->output-path drv))
(dir (uri-path
(string->uri (getenv "GUIX_BINARY_SUBSTITUTE_URL"))))
(info (string-append dir "/nix-cache-info"))
(narinfo (string-append dir "/" (store-path-hash-part output)
".narinfo")))
(dynamic-wind
(lambda ()
(call-with-output-file info
(lambda (p)
(format p "StoreDir: ~a\nWantMassQuery: 0\n"
(%store-prefix))))
(call-with-output-file narinfo
(lambda (p)
(display (derivation-narinfo drv #:sha256 sha256) p))))
thunk
(lambda ()
(delete-file narinfo)
(delete-file info)))))
(define-syntax with-derivation-narinfo
(syntax-rules (sha256 =>)
"Evaluate BODY in a context where DRV looks substitutable from the
substituter's viewpoint."
((_ drv (sha256 => hash) body ...)
(call-with-derivation-narinfo drv
(lambda () body ...)
#:sha256 hash))
((_ drv body ...)
(call-with-derivation-narinfo drv
(lambda ()
body ...)))))
(define-syntax-rule (dummy-package name* extra-fields ...)
"Return a \"dummy\" package called NAME*, with all its compulsory fields
initialized with default values, and with EXTRA-FIELDS set as specified."
(package extra-fields ...
(name name*) (version "0") (source #f)
(build-system gnu-build-system)
(synopsis #f) (description #f)
(home-page #f) (license #f)))
;; Local Variables:
;; eval: (put 'call-with-derivation-narinfo 'scheme-indent-function 1)
;; End:
;;; tests.scm ends here
|