;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2022 Mathieu Othacehe <othacehe@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 (gnu compression)
  #:use-module (guix gexp)
  #:use-module (guix ui)
  #:use-module ((gnu packages compression) #:hide (zip))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-9)
  #:use-module (ice-9 match)
  #:export (compressor
            compressor?
            compressor-name
            compressor-extension
            compressor-command
            %compressors
            lookup-compressor))

;; Type of a compression tool.
(define-record-type <compressor>
  (compressor name extension command)
  compressor?
  (name       compressor-name)      ;string (e.g., "gzip")
  (extension  compressor-extension) ;string (e.g., ".lz")
  (command    compressor-command))  ;gexp (e.g., #~(list "/gnu/store/…/gzip"
                                    ;                    "-9n" ))

(define %compressors
  ;; Available compression tools.
  (list (compressor "gzip"  ".gz"
                    #~(list #+(file-append gzip "/bin/gzip") "-9n"))
        (compressor "lzip"  ".lz"
                    #~(list #+(file-append lzip "/bin/lzip") "-9"))
        (compressor "xz"    ".xz"
                    #~(append (list #+(file-append xz "/bin/xz")
                                    "-e")
                              (%xz-parallel-args)))
        (compressor "bzip2" ".bz2"
                    #~(list #+(file-append bzip2 "/bin/bzip2") "-9"))
        (compressor "zstd" ".zst"
                    ;; The default level 3 compresses better than gzip in a
                    ;; fraction of the time, while the highest level 19
                    ;; (de)compresses more slowly and worse than xz.
                    #~(list #+(file-append zstd "/bin/zstd") "-3"))
        (compressor "none" "" #f)))

(define (lookup-compressor name)
  "Return the compressor object called NAME.  Error out if it could not be
found."
  (or (find (match-lambda
              (($ <compressor> name*)
               (string=? name* name)))
            %compressors)
      (leave (G_ "~a: compressor not found~%") name)))
cf555fdd6a8844d05389d934832c'>system: locale: Use only the current glibc.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/locale.scm (%default-locale-libcs): Remove glibc-2.31.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2021-05-15 22:55:24 +0200'>2021-05-15</span></td><td><a href='/guix/commit/gnu/system/locale.scm?id=25487c3fe6a41dd62f6e53f256392224a3be2a08'>Merge branch 'master' into core-updates</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-05-04 14:19:11 +0200'>2021-05-04</span></td><td><a href='/guix/commit/gnu/system/locale.scm?id=2e4808465d7ea5cbff0486a515cd67e3370877ce'>locale: Remove glibc 2.29 from '%default-locale-libcs'.</a><span class='msg-avail'>...<span class='msg-tooltip'>Having 2.29 is most likely no longer justified.  Removing it reduces the
closure size returned by:

  guix size $(guix system build gnu/system/install.scm)

from 1.6G to 1.5G.

* gnu/system/locale.scm (%default-locale-libcs): Remove GLIBC-2.29.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-09-20 23:56:17 +0200'>2020-09-20</span></td><td><a href='/guix/commit/gnu/system/locale.scm?id=855bc05e118913ddc5d4c544a77a2f82c9df929c'>gnu: glibc: Add version 2.31.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/base.scm (glibc-2.31): New variable.
* gnu/system/locale.scm (%default-locale-libcs): Add it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-08-26 18:45:28 +0200'>2020-08-26</span></td><td><a href='/guix/commit/gnu/system/locale.scm?id=6c443975c9cb94131f5956378495c6e3b627b6aa'>system: locale: Only use the current glibc.</a><span class='msg-avail'>...<span class='msg-tooltip'>Only use the current glibc, as adding glibc-2.29 for compatibility adds
~100MiB to the barebones system closure.

* gnu/system/locale.scm (%default-locale-libcs): Remove glibc-2.29.
</span></span></td><td>Mathieu Othacehe</td></tr>
 as the first argument to 'make-forkexec-constructor'.
* gnu/services/desktop.scm (bluetooth-shepherd-service): Likewise.
* gnu/services/spice.scm (spice-vdagent-shepherd-service): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-26 18:45:09 +0100'>2020-01-26</span></td><td><a href='/guix/commit/gnu/services/spice.scm?id=9a5edd02405b9ee70bc2f93b91483e8da2eadfd3'>services: Fix typo in spice-vdagent-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/spice.scm (spice-vdagent-service): Fix typo.

Signed-off-by: Danny Milosavljevic &lt;dannym@scratchpost.org&gt;
</span></span></td><td>Damien Cassou</td></tr>