aboutsummaryrefslogtreecommitdiff
path: root/guix/tests.scm
blob: 34e3e0fc2a7702b2b0d16e6569ff585d19bb5a46 (plain)
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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016, 2017 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 (guix serialization)
  #:use-module (guix hash)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages bootstrap)
  #:use-module (srfi srfi-34)
  #:use-module (rnrs bytevectors)
  #:use-module (ice-9 binary-ports)
  #:use-module (web uri)
  #:export (open-connection-for-tests
            random-text
            random-bytevector
            file=?
            network-reachable?
            shebang-too-long?
            mock
            %test-substitute-urls
            %substitute-directory
            with-derivation-narinfo
            with-derivation-substitute
            dummy-package
            dummy-origin))

;;; Commentary:
;;;
;;; This module provide shared infrastructure for the test suite.  For
;;; internal use only.
;;;
;;; Code:

(define %test-substitute-urls
  ;; URLs where to look for substitutes during tests.
  (make-parameter
   (or (and=> (getenv "GUIX_BINARY_SUBSTITUTE_URL") list)
       '())))

(define* (open-connection-for-tests #:optional (uri (%daemon-socket-uri)))
  "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 uri)))
      ;; Make sure we build everything by ourselves.
      (set-build-options store
                         #:use-substitutes? #f
                         #:substitute-urls (%test-substitute-urls))

      ;; 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 (random-seed)
  (or (and=> (getenv "GUIX_TESTS_RANDOM_SEED")
             number->string)
      (logxor (getpid) (car (gettimeofday)))))

(define %seed
  (let ((seed (random-seed)))
    (format (current-error-port) "random seed for tests: ~a~%"
            seed)
    (seed->random-state seed)))

(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 (file=? a b)
  "Return true if files A and B have the same type and same content."
  (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))))))

(define (network-reachable?)
  "Return true if we can reach the Internet."
  (false-if-exception (getaddrinfo "www.gnu.org" "80" AI_NUMERICSERV)))

(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))
                             (references '()))
  "Return the contents of the narinfo corresponding to DRV, with the specified
REFERENCES (a list of store items); 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: ~a
System: ~a
Deriver: ~a~%"
          (derivation->output-path drv)       ; StorePath
          nar                                 ; URL
          (bytevector->nix-base32-string sha256)  ; NarHash
          (string-join (map basename references)) ; References
          (derivation-system drv)             ; System
          (basename
           (derivation-file-name drv))))      ; Deriver

(define %substitute-directory
  (make-parameter
   (and=> (getenv "GUIX_BINARY_SUBSTITUTE_URL")
          (compose uri-path string->uri))))

(define* (call-with-derivation-narinfo drv thunk
                                       #:key
                                       (sha256 (make-bytevector 32 0))
                                       (references '()))
  "Call THUNK in a context where fake substituter data, as read by 'guix
substitute', has been installed for DRV.  SHA256 is the hash of the
expected output of DRV."
  (let* ((output  (derivation->output-path drv))
         (dir     (%substitute-directory))
         (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
                                         #:references references)
                     p))))
      thunk
      (lambda ()
        (delete-file narinfo)
        (delete-file info)))))

(define-syntax with-derivation-narinfo
  (syntax-rules (sha256 references =>)
    "Evaluate BODY in a context where DRV looks substitutable from the
substituter's viewpoint."
    ((_ drv (sha256 => hash) (references => refs) body ...)
     (call-with-derivation-narinfo drv
       (lambda () body ...)
       #:sha256 hash
       #:references refs))
    ((_ drv (sha256 => hash) body ...)
     (with-derivation-narinfo drv
       (sha256 => hash) (references => '())
       body ...))
    ((_ drv body ...)
     (call-with-derivation-narinfo drv
       (lambda ()
         body ...)))))

(define* (call-with-derivation-substitute drv contents thunk
                                          #:key
                                          sha256
                                          (references '()))
  "Call THUNK in a context where a substitute for DRV has been installed,
using CONTENTS, a string, as its contents.  If SHA256 is true, use it as the
expected hash of the substitute; otherwise use the hash of the nar containing
CONTENTS."
  (define dir (%substitute-directory))
  (dynamic-wind
    (lambda ()
      (call-with-output-file (string-append dir "/example.out")
        (lambda (port)
          (display contents port)))
      (call-with-output-file (string-append dir "/example.nar")
        (lambda (p)
          (write-file (string-append dir "/example.out") p))))
    (lambda ()
      (let ((hash (call-with-input-file (string-append dir "/example.nar")
                    port-sha256)))
        ;; Create fake substituter data, to be read by 'guix substitute'.
        (call-with-derivation-narinfo drv
          thunk
          #:sha256 (or sha256 hash)
          #:references references)))
    (lambda ()
      (delete-file (string-append dir "/example.out"))
      (delete-file (string-append dir "/example.nar")))))

(define (shebang-too-long?)
  "Return true if the typical shebang in the current store would exceed
Linux's static limit---the BINPRM_BUF_SIZE constant, normally 128 characters
all included."
  (define shebang
    (string-append "#!" (%store-prefix) "/"
                   (make-string 32 #\a)
                   "-bootstrap-binaries-0/bin/bash\0"))

  (> (string-length shebang) 128))

(define-syntax with-derivation-substitute
  (syntax-rules (sha256 references =>)
    "Evaluate BODY in a context where DRV is substitutable with the given
CONTENTS."
    ((_ drv contents (sha256 => hash) (references => refs) body ...)
     (call-with-derivation-substitute drv contents
       (lambda () body ...)
       #:sha256 hash
       #:references refs))
    ((_ drv contents (sha256 => hash) body ...)
     (with-derivation-substitute drv contents
       (sha256 => hash) (references => '())
       body ...))
    ((_ drv contents body ...)
     (call-with-derivation-substitute drv contents
       (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)))

(define-syntax-rule (dummy-origin extra-fields ...)
  "Return a \"dummy\" origin, with all its compulsory fields initialized with
default values, and with EXTRA-FIELDS set as specified."
  (origin extra-fields ...
          (method #f) (uri "http://www.example.com")
          (sha256 (base32 (make-string 52 #\x)))))

;; Local Variables:
;; eval: (put 'call-with-derivation-narinfo 'scheme-indent-function 1)
;; eval: (put 'call-with-derivation-substitute 'scheme-indent-function 2)
;; End:

;;; tests.scm ends here