tests/store-deduplication.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
   3 ;;;
   4 ;;; This file is part of GNU Guix.
   5 ;;;
   6 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   7 ;;; under the terms of the GNU General Public License as published by
   8 ;;; the Free Software Foundation; either version 3 of the License, or (at
   9 ;;; your option) any later version.
  10 ;;;
  11 ;;; GNU Guix is distributed in the hope that it will be useful, but
  12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;;; GNU General Public License for more details.
  15 ;;;
  16 ;;; You should have received a copy of the GNU General Public License
  17 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 (define-module (test-store-deduplication)
  20   #:use-module (guix tests)
  21   #:use-module (guix store deduplication)
  22   #:use-module (guix hash)
  23   #:use-module ((guix utils) #:select (call-with-temporary-directory))
  24   #:use-module (guix build utils)
  25   #:use-module (rnrs bytevectors)
  26   #:use-module (ice-9 binary-ports)
  27   #:use-module (srfi srfi-1)
  28   #:use-module (srfi srfi-64))
  29
  30 (test-begin "store-deduplication")
  31
  32 (test-equal "deduplicate"
  33   (cons* #t #f                                    ;inode comparisons
  34          2 (make-list 5 6))                       ;'nlink' values
  35
  36   (call-with-temporary-directory
  37    (lambda (store)
  38      (let ((data      (string->utf8 "Hello, world!"))
  39            (identical (map (lambda (n)
  40                              (string-append store "/" (number->string n)))
  41                            (iota 5)))
  42            (unique    (string-append store "/unique")))
  43        (for-each (lambda (file)
  44                    (call-with-output-file file
  45                      (lambda (port)
  46                        (put-bytevector port data))))
  47                  identical)
  48        (call-with-output-file unique
  49          (lambda (port)
  50            (put-bytevector port (string->utf8 "This is unique."))))
  51
  52        (for-each (lambda (file)
  53                    (deduplicate file (sha256 data) #:store store))
  54                  identical)
  55        (deduplicate unique (nar-sha256 unique) #:store store)
  56
  57        ;; (system (string-append "ls -lRia " store))
  58        (cons* (apply = (map (compose stat:ino stat) identical))
  59               (= (stat:ino (stat unique))
  60                  (stat:ino (stat (car identical))))
  61               (stat:nlink (stat unique))
  62               (map (compose stat:nlink stat) identical))))))
  63
  64 (test-end "store-deduplication")