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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 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 (test-nar)
#:use-module (guix tests)
#:use-module (guix nar)
#:use-module (guix serialization)
#:use-module (guix store)
#:use-module ((guix hash)
#:select (open-sha256-port open-sha256-input-port))
#:use-module ((guix packages)
#:select (base32))
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-64)
#:use-module (ice-9 ftw)
#:use-module (ice-9 regex)
#:use-module ((ice-9 control) #:select (let/ec))
#:use-module (ice-9 match))
;; Test the (guix nar) module.
;;;
;;; File system testing tools, initially contributed to Guile, then libchop.
;;;
(define (random-file-size)
(define %average (* 1024 512)) ; 512 KiB
(define %stddev (* 1024 64)) ; 64 KiB
(inexact->exact
(max 0 (round (+ %average (* %stddev (random:normal)))))))
(define (make-file-tree dir tree)
"Make file system TREE at DIR."
(let loop ((dir dir)
(tree tree))
(define (scope file)
(string-append dir "/" file))
(match tree
(('directory name (body ...))
(mkdir (scope name))
(for-each (cute loop (scope name) <>) body))
(('directory name (? integer? mode) (body ...))
(mkdir (scope name))
(for-each (cute loop (scope name) <>) body)
(chmod (scope name) mode))
((file)
(populate-file (scope file) (random-file-size)))
((file (? integer? mode))
(populate-file (scope file) (random-file-size))
(chmod (scope file) mode))
((from '-> to)
(symlink to (scope from))))))
(define (delete-file-tree dir tree)
"Delete file TREE from DIR."
(let loop ((dir dir)
(tree tree))
(define (scope file)
(string-append dir "/" file))
(match tree
(('directory name (body ...))
(for-each (cute loop (scope name) <>) body)
(rmdir (scope name)))
(('directory name (? integer? mode) (body ...))
(chmod (scope name) #o755) ; make sure it can be entered
(for-each (cute loop (scope name) <>) body)
(rmdir (scope name)))
((from '-> _)
(delete-file (scope from)))
((file _ ...)
(delete-file (scope file))))))
(define-syntax-rule (with-file-tree dir tree body ...)
(dynamic-wind
(lambda ()
(make-file-tree dir 'tree))
(lambda ()
body ...)
(lambda ()
(delete-file-tree dir 'tree))))
(define (file-tree-equal? input output)
"Return #t if the file trees at INPUT and OUTPUT are equal."
(define strip
(cute string-drop <> (string-length input)))
(define sibling
(compose (cut string-append output <>) strip))
(file-system-fold (const #t)
(lambda (name stat result) ; leaf
(and result
(file=? name (sibling name))))
(lambda (name stat result) ; down
result)
(lambda (name stat result) ; up
result)
(const #f) ; skip
(lambda (name stat errno result)
(pk 'error name stat errno)
#f)
#t ; result
input
lstat))
(define (populate-file file size)
(call-with-output-file file
(lambda (p)
(put-bytevector p (random-bytevector size)))))
(define (rm-rf dir)
(file-system-fold (const #t) ; enter?
(lambda (file stat result) ; leaf
(delete-file file))
(const #t) ; down
(lambda (dir stat result) ; up
(rmdir dir))
(const #t) ; skip
(const #t) ; error
#t
dir
lstat))
(define %test-dir
;; An output directory under $top_builddir.
(string-append (dirname (search-path %load-path "pre-inst-env"))
"/test-nar-" (number->string (getpid))))
(test-begin "nar")
(test-assert "write-file-tree + restore-file"
(let* ((file1 (search-path %load-path "guix.scm"))
(file2 (search-path %load-path "guix/base32.scm"))
(file3 "#!/bin/something")
(output (string-append %test-dir "/output")))
(dynamic-wind
(lambda () #t)
(lambda ()
(define-values (port get-bytevector)
(open-bytevector-output-port))
(write-file-tree "root" port
#:file-type+size
(match-lambda
("root"
(values 'directory 0))
("root/foo"
(values 'regular (stat:size (stat file1))))
("root/lnk"
(values 'symlink 0))
("root/dir"
(values 'directory 0))
("root/dir/bar"
(values 'regular (stat:size (stat file2))))
("root/dir/exe"
(values 'executable (string-length file3))))
#:file-port
(match-lambda
("root/foo" (open-input-file file1))
("root/dir/bar" (open-input-file file2))
("root/dir/exe" (open-input-string file3)))
#:symlink-target
(match-lambda
("root/lnk" "foo"))
#:directory-entries
(match-lambda
("root" '("foo" "dir" "lnk"))
("root/dir" '("bar" "exe"))))
(close-port port)
(rm-rf %test-dir)
(mkdir %test-dir)
(restore-file (open-bytevector-input-port (get-bytevector))
output)
(and (file=? (string-append output "/foo") file1)
(string=? (readlink (string-append output "/lnk"))
"foo")
(file=? (string-append output "/dir/bar") file2)
(string=? (call-with-input-file (string-append output "/dir/exe")
get-string-all)
file3)
(> (logand (stat:mode (lstat (string-append output "/dir/exe")))
#o100)
0)
(equal? '("." ".." "bar" "exe")
(scandir (string-append output "/dir")))
(equal? '("." ".." "dir" "foo" "lnk")
(scandir output))))
(lambda ()
(false-if-exception (rm-rf %test-dir))))))
(test-assert "write-file supports non-file output ports"
(let ((input (string-append (dirname (search-path %load-path "guix.scm"))
"/guix"))
(output (%make-void-port "w")))
(write-file input output)
#t))
(test-equal "write-file puts file in C locale collation order"
(base32 "0sfn5r63k88w9ls4hivnvscg82bqg8a0w7955l6xlk4g96jnb2z3")
(let ((input (string-append %test-dir ".input")))
(dynamic-wind
(lambda ()
(define (touch file)
(call-with-output-file (string-append input "/" file)
(const #t)))
(mkdir input)
(touch "B")
(touch "Z")
(touch "a")
(symlink "B" (string-append input "/z")))
(lambda ()
(let-values (((port get-hash) (open-sha256-port)))
(write-file input port)
(close-port port)
(get-hash)))
(lambda ()
(rm-rf input)))))
(test-equal "restore-file with incomplete input"
(string-append %test-dir "/foo")
(let ((port (open-bytevector-input-port #vu8(1 2 3))))
(guard (c ((nar-error? c)
(and (eq? port (nar-error-port c))
(nar-error-file c))))
(restore-file port (string-append %test-dir "/foo"))
#f)))
(test-assert "write-file + restore-file"
(let* ((input (string-append (dirname (search-path %load-path "guix.scm"))
"/guix"))
(output %test-dir)
(nar (string-append output ".nar")))
(dynamic-wind
(lambda () #t)
(lambda ()
(call-with-output-file nar
(cut write-file input <>))
(call-with-input-file nar
(cut restore-file <> output))
(file-tree-equal? input output))
(lambda ()
(false-if-exception (delete-file nar))
(false-if-exception (rm-rf output))))))
(test-assert "write-file + restore-file with symlinks"
(let ((input (string-append %test-dir ".input")))
(mkdir input)
(dynamic-wind
(const #t)
(lambda ()
(with-file-tree input
(directory "root"
(("reg") ("exe" #o777) ("sym" -> "reg")))
(let* ((output %test-dir)
(nar (string-append output ".nar")))
(dynamic-wind
(lambda () #t)
(lambda ()
(call-with-output-file nar
(cut write-file input <>))
(call-with-input-file nar
(cut restore-file <> output))
(file-tree-equal? input output))
(lambda ()
(false-if-exception (delete-file nar))
(false-if-exception (rm-rf output)))))))
(lambda ()
(rmdir input)))))
(test-assert "write-file #:select? + restore-file"
(let ((input (string-append %test-dir ".input")))
(mkdir input)
(dynamic-wind
(const #t)
(lambda ()
(with-file-tree input
(directory "root"
((directory "a" (("x") ("y") ("z")))
("b") ("c") ("d" -> "b")))
(let* ((output %test-dir)
(nar (string-append output ".nar")))
(dynamic-wind
(lambda () #t)
(lambda ()
(call-with-output-file nar
(lambda (port)
(write-file input port
#:select?
(lambda (file stat)
(and (not (string=? (basename file)
"a"))
(not (eq? (stat:type stat)
'symlink)))))))
(call-with-input-file nar
(cut restore-file <> output))
;; Make sure "a" and "d" have been filtered out.
(and (not (file-exists? (string-append output "/root/a")))
(file=? (string-append output "/root/b")
(string-append input "/root/b"))
(file=? (string-append output "/root/c")
(string-append input "/root/c"))
(not (file-exists? (string-append output "/root/d")))))
(lambda ()
(false-if-exception (delete-file nar))
(false-if-exception (rm-rf output)))))))
(lambda ()
(rmdir input)))))
;; 'restore-file-set' depends on 'open-sha256-input-port', which in turn
;; relies on a Guile 2.0.10+ feature.
(test-skip (if (false-if-exception
(open-sha256-input-port (%make-void-port "r")))
0
3))
(test-assert "restore-file-set (signed, valid)"
(with-store store
(let* ((texts (unfold (cut >= <> 10)
(lambda _ (random-text))
1+
0))
(files (map (cut add-text-to-store store "text" <>) texts))
(dump (call-with-bytevector-output-port
(cut export-paths store files <>))))
(delete-paths store files)
(and (every (negate file-exists?) files)
(let* ((source (open-bytevector-input-port dump))
(imported (restore-file-set source)))
(and (equal? imported files)
(every (lambda (file)
(and (file-exists? file)
(valid-path? store file)))
files)
(equal? texts
(map (lambda (file)
(call-with-input-file file
get-string-all))
files))))))))
(test-assert "restore-file-set (missing signature)"
(let/ec return
(with-store store
(let* ((file (add-text-to-store store "foo" (random-text)))
(dump (call-with-bytevector-output-port
(cute export-paths store (list file) <>
#:sign? #f))))
(delete-paths store (list file))
(and (not (file-exists? file))
(let ((source (open-bytevector-input-port dump)))
(guard (c ((nar-signature-error? c)
(let ((message (condition-message c))
(port (nar-error-port c)))
(return
(and (string-match "lacks.*signature" message)
(string=? file (nar-error-file c))
(eq? source port))))))
(restore-file-set source))
#f))))))
(test-assert "restore-file-set (corrupt)"
(let/ec return
(with-store store
(let* ((file (add-text-to-store store "foo"
(random-text)))
(dump (call-with-bytevector-output-port
(cute export-paths store (list file) <>))))
(delete-paths store (list file))
;; Flip a byte in the file contents.
(let* ((index 120)
(byte (bytevector-u8-ref dump index)))
(bytevector-u8-set! dump index (logxor #xff byte)))
(and (not (file-exists? file))
(let ((source (open-bytevector-input-port dump)))
(guard (c ((nar-invalid-hash-error? c)
(let ((message (condition-message c))
(port (nar-error-port c)))
(return
(and (string-contains message "hash")
(string=? file (nar-error-file c))
(eq? source port))))))
(restore-file-set source))
#f))))))
(test-end "nar")
;;; Local Variables:
;;; eval: (put 'with-file-tree 'scheme-indent-function 2)
;;; End: