;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019 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 config) #:select (%storedir %localstatedir)) #:use-module (guix store) #:use-module (guix derivations) #:use-module (guix packages) #:use-module (guix base32) #:use-module (guix serialization) #:use-module (gcrypt hash) #:use-module (guix build-system gnu) #:use-module (gnu packages bootstrap) #:use-module (srfi srfi-34) #:use-module (srfi srfi-64) #:use-module (rnrs bytevectors) #:use-module (ice-9 binary-ports) #:use-module (web uri) #:export (open-connection-for-tests with-external-store random-text random-bytevector file=? canonical-file? network-reachable? shebang-too-long? with-environment-variable mock %test-substitute-urls test-assertm test-equalm %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 ((store-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 (call-with-external-store proc) "Call PROC with an open connection to the external store or #f it there is no external store to talk to." (parameterize ((%daemon-socket-uri (string-append %localstatedir "/guix/daemon-socket/socket")) (%store-prefix %storedir)) (define store (catch #t (lambda () (open-connection)) (const #f))) (dynamic-wind (const #t) (lambda () ;; Since we're using a different store we must clear the ;; package-derivation cache. (hash-clear! (@@ (guix packages) %derivation-cache)) (proc store)) (lambda () (when store (close-connection store)))))) (define-syntax-rule (with-external-store store exp ...) "Evaluate EXP with STORE bound to the external store rather than the temporary test store, or #f if there is no external store to talk to. This is meant to be used for tests that need to build packages that would be too expensive to build entirely in the test store." (call-with-external-store (lambda (store) exp ...))) (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 (canonical-file? file) "Return #t if FILE is in the store, is read-only, and its mtime is 1." (let ((st (lstat file))) (or (not (string-prefix? (%store-prefix) file)) (eq? 'symlink (stat:type st)) (and (= 1 (stat:mtime st)) (zero? (logand #o222 (stat:mode st))))))) (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))))) (define-syntax-rule (test-assertm name exp) "Like 'test-assert', but EXP is a monadic value. A new connection to the store is opened." (test-assert name (let ((store (open-connection-for-tests))) (dynamic-wind (const #t) (lambda () (run-with-store store exp #:guile-for-build (%guile-for-build))) (lambda () (close-connection store)))))) (define-syntax-rule (test-equalm name value exp) "Like 'test-equal', but EXP is a monadic value. A new connection to the store is opened." (test-equal name value (with-store store (run-with-store store exp #:guile-for-build (%guile-for-build))))) (define-syntax-rule (with-environment-variable variable value body ...) "Run BODY with VARIABLE set to VALUE." (let ((orig (getenv variable))) (dynamic-wind (lambda () (setenv variable value)) (lambda () body ...) (lambda () (if orig (setenv variable orig) (unsetenv variable)))))) ;;; ;;; 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." (let ((p (package (name name*) (version "0") (source #f) (build-system gnu-build-system) (synopsis #f) (description #f) (home-page #f) (license #f)))) (package (inherit p) extra-fields ...))) (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." (let ((o (origin (method #f) (uri "http://www.example.com") (sha256 (base32 (make-string 52 #\x)))))) (origin (inherit o) extra-fields ...))) ;; 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