210 lines
7.3 KiB
Scheme
210 lines
7.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix tests)
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#:use-module (guix store)
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#:use-module (guix derivations)
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#:use-module (guix packages)
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#:use-module (guix base32)
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#:use-module (guix serialization)
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#:use-module (guix hash)
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#:use-module (gnu packages bootstrap)
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#:use-module (srfi srfi-34)
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#:use-module (rnrs bytevectors)
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#:use-module (web uri)
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#:export (open-connection-for-tests
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random-text
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random-bytevector
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mock
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%substitute-directory
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with-derivation-narinfo
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with-derivation-substitute
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dummy-package))
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;;; Commentary:
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;;;
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;;; This module provide shared infrastructure for the test suite. For
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;;; internal use only.
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;;;
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;;; Code:
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(define (open-connection-for-tests)
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"Open a connection to the build daemon for tests purposes and return it."
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(guard (c ((nix-error? c)
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(format (current-error-port)
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"warning: build daemon error: ~s~%" c)
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#f))
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(let ((store (open-connection)))
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;; Make sure we build everything by ourselves.
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(set-build-options store #:use-substitutes? #f)
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;; Use the bootstrap Guile when running tests, so we don't end up
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;; building everything in the temporary test store.
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(%guile-for-build (package-derivation store %bootstrap-guile))
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store)))
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(define %seed
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(seed->random-state (logxor (getpid) (car (gettimeofday)))))
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(define (random-text)
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"Return the hexadecimal representation of a random number."
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(number->string (random (expt 2 256) %seed) 16))
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(define (random-bytevector n)
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"Return a random bytevector of N bytes."
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(let ((bv (make-bytevector n)))
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(let loop ((i 0))
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(if (< i n)
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(begin
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(bytevector-u8-set! bv i (random 256 %seed))
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(loop (1+ i)))
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bv))))
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(define-syntax-rule (mock (module proc replacement) body ...)
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"Within BODY, replace the definition of PROC from MODULE with the definition
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given by REPLACEMENT."
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(let* ((m (resolve-module 'module))
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(original (module-ref m 'proc)))
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(dynamic-wind
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(lambda () (module-set! m 'proc replacement))
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(lambda () body ...)
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(lambda () (module-set! m 'proc original)))))
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;;;
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;;; Narinfo files, as used by the substituter.
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;;;
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(define* (derivation-narinfo drv #:key (nar "example.nar")
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(sha256 (make-bytevector 32 0)))
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"Return the contents of the narinfo corresponding to DRV; NAR should be the
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file name of the archive containing the substitute for DRV, and SHA256 is the
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expected hash."
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(format #f "StorePath: ~a
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URL: ~a
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Compression: none
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NarSize: 1234
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NarHash: sha256:~a
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References:
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System: ~a
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Deriver: ~a~%"
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(derivation->output-path drv) ; StorePath
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nar ; URL
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(bytevector->nix-base32-string sha256) ; NarHash
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(derivation-system drv) ; System
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(basename
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(derivation-file-name drv)))) ; Deriver
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(define %substitute-directory
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(make-parameter
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(and=> (getenv "GUIX_BINARY_SUBSTITUTE_URL")
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(compose uri-path string->uri))))
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(define* (call-with-derivation-narinfo drv thunk
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#:key (sha256 (make-bytevector 32 0)))
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"Call THUNK in a context where fake substituter data, as read by 'guix
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substitute-binary', has been installed for DRV. SHA256 is the hash of the
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expected output of DRV."
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(let* ((output (derivation->output-path drv))
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(dir (%substitute-directory))
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(info (string-append dir "/nix-cache-info"))
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(narinfo (string-append dir "/" (store-path-hash-part output)
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".narinfo")))
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(dynamic-wind
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(lambda ()
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(call-with-output-file info
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(lambda (p)
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(format p "StoreDir: ~a\nWantMassQuery: 0\n"
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(%store-prefix))))
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(call-with-output-file narinfo
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(lambda (p)
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(display (derivation-narinfo drv #:sha256 sha256) p))))
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thunk
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(lambda ()
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(delete-file narinfo)
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(delete-file info)))))
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(define-syntax with-derivation-narinfo
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(syntax-rules (sha256 =>)
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"Evaluate BODY in a context where DRV looks substitutable from the
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substituter's viewpoint."
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((_ drv (sha256 => hash) body ...)
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(call-with-derivation-narinfo drv
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(lambda () body ...)
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#:sha256 hash))
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((_ drv body ...)
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(call-with-derivation-narinfo drv
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(lambda ()
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body ...)))))
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(define* (call-with-derivation-substitute drv contents thunk
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#:key sha256)
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"Call THUNK in a context where a substitute for DRV has been installed,
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using CONTENTS, a string, as its contents. If SHA256 is true, use it as the
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expected hash of the substitute; otherwise use the hash of the nar containing
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CONTENTS."
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(define dir (%substitute-directory))
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(dynamic-wind
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(lambda ()
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(call-with-output-file (string-append dir "/example.out")
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(lambda (port)
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(display contents port)))
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(call-with-output-file (string-append dir "/example.nar")
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(lambda (p)
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(write-file (string-append dir "/example.out") p))))
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(lambda ()
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(let ((hash (call-with-input-file (string-append dir "/example.nar")
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port-sha256)))
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;; Create fake substituter data, to be read by `substitute-binary'.
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(call-with-derivation-narinfo drv
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thunk
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#:sha256 (or sha256 hash))))
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(lambda ()
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(delete-file (string-append dir "/example.out"))
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(delete-file (string-append dir "/example.nar")))))
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(define-syntax with-derivation-substitute
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(syntax-rules (sha256 =>)
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"Evaluate BODY in a context where DRV is substitutable with the given
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CONTENTS."
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((_ drv contents (sha256 => hash) body ...)
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(call-with-derivation-substitute drv contents
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(lambda () body ...)
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#:sha256 hash))
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((_ drv contents body ...)
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(call-with-derivation-substitute drv contents
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(lambda ()
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body ...)))))
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(define-syntax-rule (dummy-package name* extra-fields ...)
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"Return a \"dummy\" package called NAME*, with all its compulsory fields
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initialized with default values, and with EXTRA-FIELDS set as specified."
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(package extra-fields ...
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(name name*) (version "0") (source #f)
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(build-system gnu-build-system)
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(synopsis #f) (description #f)
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(home-page #f) (license #f)))
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;; Local Variables:
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;; eval: (put 'call-with-derivation-narinfo 'scheme-indent-function 1)
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;; eval: (put 'call-with-derivation-substitute 'scheme-indent-function 2)
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;; End:
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;;; tests.scm ends here
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