guix/tests/file-systems.scm
Maxim Cournoyer 11f0698243
pack: Streamline how files are included in tarballs.
Thanks to Guillem Jover <guillem@debian.org> on the OFTC's #debian-dpkg
channel for helping with troubleshooting.

Letting GNU Tar recursively walk the complete files hierarchy side-steps the
risks associated with providing a list of file names:

1. Duplicated files in the archive (recorded as hard links by GNU Tar)
2. Missing parent directories.

The above would cause dpkg to malfunction, for example by aborting early and
skipping triggers when there were missing parent directories.

* guix/scripts/pack.scm (self-contained-tarball/builder): Do not call
POPULATE-SINGLE-PROFILE-DIRECTORY, which creates extraneous files such as
/root.  Instead, call POPULATE-STORE and INSTALL-DATABASE-AND-GC-ROOTS
individually to more precisely generate the file system.  Replace the list of
files by the current directory, "." and streamline the way options are passed.
* gnu/system/file-systems.scm (reduce-directories): Remove procedure.
* tests/file-systems.scm ("reduce-directories"): Remove test.
2021-07-18 02:10:49 -04:00

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;;
;;; 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-file-systems)
#:use-module (guix store)
#:use-module (guix modules)
#:use-module (gnu system file-systems)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-64)
#:use-module (ice-9 match))
;; Test the (gnu system file-systems) module.
(test-begin "file-systems")
(test-assert "file-system-needed-for-boot?"
(let-syntax ((dummy-fs (syntax-rules ()
((_ directory)
(file-system
(device "foo")
(mount-point directory)
(type "ext4"))))))
(parameterize ((%store-prefix "/gnu/guix/store"))
(and (file-system-needed-for-boot? (dummy-fs "/"))
(file-system-needed-for-boot? (dummy-fs "/gnu"))
(file-system-needed-for-boot? (dummy-fs "/gnu/guix"))
(file-system-needed-for-boot? (dummy-fs "/gnu/guix/store"))
(not (file-system-needed-for-boot?
(dummy-fs "/gnu/guix/store/foo")))
(not (file-system-needed-for-boot? (dummy-fs "/gn")))
(not (file-system-needed-for-boot?
(file-system
(inherit (dummy-fs (%store-prefix)))
(device "/foo")
(flags '(bind-mount read-only)))))))))
(test-assert "does not pull (guix config)"
;; This module is meant both for the host side and "build side", so make
;; sure it doesn't pull in (guix config), which depends on the user's
;; config.
(not (member '(guix config)
(source-module-closure '((gnu system file-systems))))))
(test-equal "does not pull (gnu packages …)"
;; Same story: (gnu packages …) should not be pulled.
#f
(find (match-lambda
(('gnu 'packages _ ..1) #t)
(_ #f))
(source-module-closure '((gnu system file-systems)))))
(test-equal "file-system-options->alist"
'("autodefrag" ("subvol" . "home") ("compress" . "lzo"))
(file-system-options->alist "autodefrag,subvol=home,compress=lzo"))
(test-equal "file-system-options->alist (#f)"
'()
(file-system-options->alist #f))
(test-equal "alist->file-system-options"
"autodefrag,subvol=root,compress=lzo"
(alist->file-system-options '("autodefrag"
("subvol" . "root")
("compress" . "lzo"))))
(test-equal "alist->file-system-options (null)"
#f
(alist->file-system-options '()))
;;;
;;; Btrfs related.
;;;
(define %btrfs-root-subvolume
(file-system
(device (file-system-label "btrfs-pool"))
(mount-point "/")
(type "btrfs")
(options "subvol=rootfs,compress=zstd")))
(define %btrfs-store-subvolid
(file-system
(device (file-system-label "btrfs-pool"))
(mount-point "/gnu/store")
(type "btrfs")
(options "subvolid=10,compress=zstd")
(dependencies (list %btrfs-root-subvolume))))
(define %btrfs-store-subvolume
(file-system
(device (file-system-label "btrfs-pool"))
(mount-point "/gnu/store")
(type "btrfs")
(options "subvol=/some/nested/file/name")
(dependencies (list %btrfs-root-subvolume))))
(test-assert "btrfs-subvolume? (subvol)"
(btrfs-subvolume? %btrfs-root-subvolume))
(test-assert "btrfs-subvolume? (subvolid)"
(btrfs-subvolume? %btrfs-store-subvolid))
(test-equal "btrfs-store-subvolume-file-name"
"/some/nested/file/name"
(parameterize ((%store-prefix "/gnu/store"))
(btrfs-store-subvolume-file-name (list %btrfs-root-subvolume
%btrfs-store-subvolume))))
(test-error "btrfs-store-subvolume-file-name (subvolid)"
(parameterize ((%store-prefix "/gnu/store"))
(btrfs-store-subvolume-file-name (list %btrfs-root-subvolume
%btrfs-store-subvolid))))
(test-end)