mirror of
https://git.in.rschanz.org/ryan77627/guix.git
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a93e91ff48
* guix/nar.scm (write-contents): Use 'sendfile' only when P is a file
port.
* tests/nar.scm ("write-file supports non-file output ports"): New test.
319 lines
11 KiB
Scheme
319 lines
11 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013, 2014 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-nar)
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#:use-module (guix nar)
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#:use-module (guix store)
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#:use-module ((guix hash) #:select (open-sha256-input-port))
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#:use-module (rnrs bytevectors)
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#:use-module (rnrs io ports)
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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-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-64)
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#:use-module (ice-9 ftw)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 match))
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;; Test the (guix nar) module.
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;;;
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;;; File system testing tools, initially contributed to Guile, then libchop.
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;;;
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(define (random-file-size)
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(define %average (* 1024 512)) ; 512 KiB
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(define %stddev (* 1024 64)) ; 64 KiB
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(inexact->exact
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(max 0 (round (+ %average (* %stddev (random:normal)))))))
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(define (make-file-tree dir tree)
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"Make file system TREE at DIR."
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(let loop ((dir dir)
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(tree tree))
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(define (scope file)
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(string-append dir "/" file))
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(match tree
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(('directory name (body ...))
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(mkdir (scope name))
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(for-each (cute loop (scope name) <>) body))
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(('directory name (? integer? mode) (body ...))
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(mkdir (scope name))
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(for-each (cute loop (scope name) <>) body)
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(chmod (scope name) mode))
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((file)
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(populate-file (scope file) (random-file-size)))
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((file (? integer? mode))
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(populate-file (scope file) (random-file-size))
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(chmod (scope file) mode))
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((from '-> to)
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(symlink to (scope from))))))
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(define (delete-file-tree dir tree)
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"Delete file TREE from DIR."
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(let loop ((dir dir)
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(tree tree))
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(define (scope file)
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(string-append dir "/" file))
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(match tree
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(('directory name (body ...))
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(for-each (cute loop (scope name) <>) body)
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(rmdir (scope name)))
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(('directory name (? integer? mode) (body ...))
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(chmod (scope name) #o755) ; make sure it can be entered
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(for-each (cute loop (scope name) <>) body)
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(rmdir (scope name)))
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((from '-> _)
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(delete-file (scope from)))
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((file _ ...)
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(delete-file (scope file))))))
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(define-syntax-rule (with-file-tree dir tree body ...)
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(dynamic-wind
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(lambda ()
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(make-file-tree dir 'tree))
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(lambda ()
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body ...)
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(lambda ()
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(delete-file-tree dir 'tree))))
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(define (file-tree-equal? input output)
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"Return #t if the file trees at INPUT and OUTPUT are equal."
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(define strip
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(cute string-drop <> (string-length input)))
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(define sibling
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(compose (cut string-append output <>) strip))
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(define (file=? a b)
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(and (eq? (stat:type (lstat a)) (stat:type (lstat b)))
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(case (stat:type (lstat a))
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((regular)
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(equal?
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(call-with-input-file a get-bytevector-all)
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(call-with-input-file b get-bytevector-all)))
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((symlink)
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(string=? (readlink a) (readlink b)))
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(else
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(error "what?" (lstat a))))))
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(file-system-fold (const #t)
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(lambda (name stat result) ; leaf
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(and result
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(file=? name (sibling name))))
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(lambda (name stat result) ; down
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result)
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(lambda (name stat result) ; up
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result)
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(const #f) ; skip
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(lambda (name stat errno result)
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(pk 'error name stat errno)
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#f)
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(> (stat:nlink (stat output)) 2)
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input
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lstat))
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(define (make-random-bytevector n)
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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))
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(loop (1+ i)))
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bv))))
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(define (populate-file file size)
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(call-with-output-file file
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(lambda (p)
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(put-bytevector p (make-random-bytevector size)))))
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(define (rm-rf dir)
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(file-system-fold (const #t) ; enter?
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(lambda (file stat result) ; leaf
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(delete-file file))
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(const #t) ; down
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(lambda (dir stat result) ; up
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(rmdir dir))
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(const #t) ; skip
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(const #t) ; error
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#t
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dir
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lstat))
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(define %test-dir
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;; An output directory under $top_builddir.
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(string-append (dirname (search-path %load-path "pre-inst-env"))
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"/test-nar-" (number->string (getpid))))
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;; XXX: Factorize.
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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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(number->string (random (expt 2 256) %seed) 16))
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(define-syntax-rule (let/ec k exp...)
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;; This one appeared in Guile 2.0.9, so provide a copy here.
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(let ((tag (make-prompt-tag)))
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(call-with-prompt tag
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(lambda ()
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(let ((k (lambda args
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(apply abort-to-prompt tag args))))
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exp...))
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(lambda (_ . args)
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(apply values args)))))
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(test-begin "nar")
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(test-assert "write-file supports non-file output ports"
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(let ((input (string-append (dirname (search-path %load-path "guix.scm"))
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"/guix"))
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(output (%make-void-port "w")))
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(write-file input output)
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#t))
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(test-assert "write-file + restore-file"
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(let* ((input (string-append (dirname (search-path %load-path "guix.scm"))
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"/guix"))
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(output %test-dir)
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(nar (string-append output ".nar")))
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(dynamic-wind
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(lambda () #t)
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(lambda ()
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(call-with-output-file nar
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(cut write-file input <>))
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(call-with-input-file nar
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(cut restore-file <> output))
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(file-tree-equal? input output))
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(lambda ()
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(false-if-exception (delete-file nar))
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(false-if-exception (rm-rf output))))))
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(test-assert "write-file + restore-file with symlinks"
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(let ((input (string-append %test-dir ".input")))
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(mkdir input)
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(dynamic-wind
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(const #t)
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(lambda ()
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(with-file-tree input
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(directory "root"
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(("reg") ("exe" #o777) ("sym" -> "reg")))
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(let* ((output %test-dir)
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(nar (string-append output ".nar")))
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(dynamic-wind
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(lambda () #t)
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(lambda ()
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(call-with-output-file nar
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(cut write-file input <>))
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(call-with-input-file nar
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(cut restore-file <> output))
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(file-tree-equal? input output))
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(lambda ()
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(false-if-exception (delete-file nar))
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(false-if-exception (rm-rf output)))))))
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(lambda ()
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(rmdir input)))))
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;; 'restore-file-set' depends on 'open-sha256-input-port', which in turn
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;; relies on a Guile 2.0.10+ feature.
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(test-skip (if (false-if-exception
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(open-sha256-input-port (%make-void-port "r")))
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0
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3))
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(test-assert "restore-file-set (signed, valid)"
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(with-store store
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(let* ((texts (unfold (cut >= <> 10)
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(lambda _ (random-text))
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1+
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0))
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(files (map (cut add-text-to-store store "text" <>) texts))
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(dump (call-with-bytevector-output-port
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(cut export-paths store files <>))))
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(delete-paths store files)
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(and (every (negate file-exists?) files)
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(let* ((source (open-bytevector-input-port dump))
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(imported (restore-file-set source)))
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(and (equal? imported files)
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(every (lambda (file)
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(and (file-exists? file)
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(valid-path? store file)))
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files)
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(equal? texts
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(map (lambda (file)
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(call-with-input-file file
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get-string-all))
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files))))))))
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(test-assert "restore-file-set (missing signature)"
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(let/ec return
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(with-store store
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(let* ((file (add-text-to-store store "foo" "Hello, world!"))
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(dump (call-with-bytevector-output-port
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(cute export-paths store (list file) <>
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#:sign? #f))))
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(delete-paths store (list file))
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(and (not (file-exists? file))
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(let ((source (open-bytevector-input-port dump)))
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(guard (c ((nar-signature-error? c)
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(let ((message (condition-message c))
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(port (nar-error-port c)))
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(return
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(and (string-match "lacks.*signature" message)
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(string=? file (nar-error-file c))
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(eq? source port))))))
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(restore-file-set source))
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#f))))))
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(test-assert "restore-file-set (corrupt)"
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(let/ec return
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(with-store store
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(let* ((file (add-text-to-store store "foo"
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(random-text)))
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(dump (call-with-bytevector-output-port
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(cute export-paths store (list file) <>))))
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(delete-paths store (list file))
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;; Flip a byte in the file contents.
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(let* ((index 120)
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(byte (bytevector-u8-ref dump index)))
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(bytevector-u8-set! dump index (logxor #xff byte)))
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(and (not (file-exists? file))
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(let ((source (open-bytevector-input-port dump)))
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(guard (c ((nar-invalid-hash-error? c)
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(let ((message (condition-message c))
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(port (nar-error-port c)))
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(return
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(and (string-contains message "hash")
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(string=? file (nar-error-file c))
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(eq? source port))))))
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(restore-file-set source))
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#f))))))
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(test-end "nar")
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(exit (= (test-runner-fail-count (test-runner-current)) 0))
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;;; Local Variables:
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;;; eval: (put 'with-file-tree 'scheme-indent-function 2)
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;;; End:
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