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* guix/scripts/challenge.scm (call-with-nar): New procedure.
(narinfo-contents): Express in terms of 'call-with-nar'.
(call-with-mismatches, report-differing-files/external): New
procedures.
(%diffoscope-command): New variable.
(%options): Support "diffoscope" and a string starting with "/".
* tests/challenge.scm (call-mismatch-test): New procedure.
("differing-files"): Rewrite in terms of 'call-mismatch-test'.
("call-with-mismatches"): New test.
* doc/guix.texi (Invoking guix challenge): Document it.
241 lines
10 KiB
Scheme
241 lines
10 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015, 2017, 2019 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 (test-challenge)
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#:use-module (guix tests)
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#:use-module (guix tests http)
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#:use-module (gcrypt hash)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix derivations)
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#:use-module (guix serialization)
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#:use-module (guix packages)
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#:use-module (guix gexp)
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#:use-module (guix base32)
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#:use-module (guix scripts challenge)
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#:use-module (guix scripts substitute)
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#:use-module ((guix build utils) #:select (find-files))
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#:use-module (gnu packages bootstrap)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-64)
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#:use-module (rnrs bytevectors)
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#:use-module (rnrs io ports)
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#:use-module (ice-9 match))
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(define query-path-hash*
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(store-lift query-path-hash))
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(define (query-path-size item)
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(mlet %store-monad ((info (query-path-info* item)))
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(return (path-info-nar-size info))))
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(define* (call-with-derivation-narinfo* drv thunk hash)
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(lambda (store)
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(with-derivation-narinfo drv (sha256 => hash)
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(values (run-with-store store (thunk)) store))))
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(define-syntax with-derivation-narinfo*
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(syntax-rules (sha256 =>)
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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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hash))))
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(test-begin "challenge")
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(test-assertm "no discrepancies"
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(let ((text (random-text)))
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(mlet* %store-monad ((drv (gexp->derivation "something"
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#~(call-with-output-file
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#$output
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(lambda (port)
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(display #$text port)))))
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(out -> (derivation->output-path drv)))
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(mbegin %store-monad
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(built-derivations (list drv))
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(mlet %store-monad ((hash (query-path-hash* out)))
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(with-derivation-narinfo* drv (sha256 => hash)
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(>>= (compare-contents (list out) (%test-substitute-urls))
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(match-lambda
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((report)
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(return
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(and (string=? out (comparison-report-item report))
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(bytevector=?
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(comparison-report-local-sha256 report)
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hash)
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(comparison-report-match? report))))))))))))
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(test-assertm "one discrepancy"
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(let ((text (random-text)))
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(mlet* %store-monad ((drv (gexp->derivation "something"
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#~(call-with-output-file
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#$output
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(lambda (port)
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(display #$text port)))))
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(out -> (derivation->output-path drv)))
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(mbegin %store-monad
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(built-derivations (list drv))
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(mlet* %store-monad ((hash (query-path-hash* out))
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(wrong-hash
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-> (let* ((w (bytevector-copy hash))
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(b (bytevector-u8-ref w 0)))
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(bytevector-u8-set! w 0
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(modulo (+ b 1) 128))
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w)))
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(with-derivation-narinfo* drv (sha256 => wrong-hash)
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(>>= (compare-contents (list out) (%test-substitute-urls))
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(match-lambda
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((report)
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(return
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(and (string=? out (comparison-report-item (pk report)))
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(eq? 'mismatch (comparison-report-result report))
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(bytevector=? hash
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(comparison-report-local-sha256
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report))
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(match (comparison-report-narinfos report)
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((bad)
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(bytevector=? wrong-hash
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(narinfo-hash->sha256
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(narinfo-hash bad))))))))))))))))
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(test-assertm "inconclusive: no substitutes"
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(mlet* %store-monad ((drv (gexp->derivation "foo" #~(mkdir #$output)))
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(out -> (derivation->output-path drv))
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(_ (built-derivations (list drv)))
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(hash (query-path-hash* out)))
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(>>= (compare-contents (list out) (%test-substitute-urls))
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(match-lambda
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((report)
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(return
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(and (string=? out (comparison-report-item report))
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(comparison-report-inconclusive? report)
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(null? (comparison-report-narinfos report))
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(bytevector=? (comparison-report-local-sha256 report)
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hash))))))))
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(test-assertm "inconclusive: no local build"
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(let ((text (random-text)))
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(mlet* %store-monad ((drv (gexp->derivation "something"
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#~(list #$output #$text)))
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(out -> (derivation->output-path drv))
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(hash -> (sha256 #vu8())))
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(with-derivation-narinfo* drv (sha256 => hash)
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(>>= (compare-contents (list out) (%test-substitute-urls))
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(match-lambda
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((report)
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(return
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(and (string=? out (comparison-report-item report))
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(comparison-report-inconclusive? report)
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(not (comparison-report-local-sha256 report))
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(match (comparison-report-narinfos report)
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((narinfo)
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(bytevector=? (narinfo-hash->sha256
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(narinfo-hash narinfo))
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hash))))))))))))
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(define (make-narinfo item size hash)
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(format #f "StorePath: ~a
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Compression: none
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URL: nar/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo
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NarSize: ~d
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NarHash: sha256:~a
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References: ~%" item size (bytevector->nix-base32-string hash)))
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(define (call-mismatch-test proc)
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"Pass PROC a <comparison-report> for a mismatch and return its return
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value."
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;; Pretend we have two different results for the same store item, ITEM, with
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;; "/bin/guile" differing between the two nars.
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(mlet* %store-monad
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((drv1 (package->derivation %bootstrap-guile))
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(drv2 (gexp->derivation
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"broken-guile"
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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(copy-recursively #$drv1 #$output)
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(chmod (string-append #$output "/bin/guile")
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#o755)
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(call-with-output-file (string-append
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#$output
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"/bin/guile")
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(lambda (port)
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(display "corrupt!" port)))))))
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(out1 -> (derivation->output-path drv1))
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(out2 -> (derivation->output-path drv2))
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(item -> (string-append (%store-prefix) "/"
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(bytevector->nix-base32-string
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(random-bytevector 32))
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"-foo"
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(number->string (current-time) 16))))
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(mbegin %store-monad
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(built-derivations (list drv1 drv2))
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(mlet* %store-monad ((size1 (query-path-size out1))
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(size2 (query-path-size out2))
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(hash1 (query-path-hash* out1))
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(hash2 (query-path-hash* out2))
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(nar1 -> (call-with-bytevector-output-port
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(lambda (port)
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(write-file out1 port))))
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(nar2 -> (call-with-bytevector-output-port
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(lambda (port)
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(write-file out2 port)))))
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(parameterize ((%http-server-port 9000))
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(with-http-server `((200 ,(make-narinfo item size1 hash1))
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(200 ,nar1))
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(parameterize ((%http-server-port 9001))
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(with-http-server `((200 ,(make-narinfo item size2 hash2))
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(200 ,nar2))
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(mlet* %store-monad ((urls -> (list (%local-url 9000)
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(%local-url 9001)))
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(reports (compare-contents (list item)
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urls)))
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(pk 'report reports)
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(return (proc (car reports))))))))))))
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(test-assertm "differing-files"
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(call-mismatch-test
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(lambda (report)
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(equal? (differing-files report) '("/bin/guile")))))
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(test-assertm "call-with-mismatches"
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(call-mismatch-test
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(lambda (report)
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(call-with-mismatches
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report
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(lambda (directory1 directory2)
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(let* ((files1 (find-files directory1))
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(files2 (find-files directory2))
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(files (map (cute string-drop <> (string-length directory1))
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files1)))
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(and (equal? files
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(map (cute string-drop <> (string-length directory2))
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files2))
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(equal? (remove (lambda (file)
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(file=? (string-append directory1 "/" file)
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(string-append directory2 "/" file)))
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files)
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'("/bin/guile")))))))))
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(test-end)
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;;; Local Variables:
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;;; eval: (put 'with-derivation-narinfo* 'scheme-indent-function 2)
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;;; End:
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