;;; 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)))
/a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/build.scm (options-&gt;derivations)[compute-derivation]:
Pass ‘system’ to ‘package-source-derivation’.
* tests/guix-build.sh: Test ‘-S’ together with ‘-s’.

Change-Id: If35f116285dd9caaf939221163ad0ba831eea993
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-08-17 17:33:53 +0200'>2023-08-17</span></td><td><a href='/guix/commit/tests/guix-build.sh?id=3363ff1867bb02c4aa4955db917ef1d67f2c47e6'>ui: 'load*' accepts /dev/fd/N files pointing to a pipe.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows users to write Bash commands like:

  guix time-machine -C &lt;(echo %default-channels) -- ...

or:

  guix build -m &lt;(echo '(specifications-&gt;manifest (list "guile"))')

Previously, on GNU/Linux, they would fail with:

  error: failed to load '/dev/fd/63': No such file or directory

* guix/ui.scm (try-canonicalize-path): New procedure.
(load*): Use it.
* tests/guix-build.sh: Test 'guix build -m' with a /dev/fd/N file.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-04-28 19:50:36 +0200'>2023-04-28</span></td><td><a href='/guix/commit/tests/guix-build.sh?id=5c26e69118128f6ef162cabddfe5726f03abe4ae'>tests: guix-build.sh: Don't use hidden gcc for transformation tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-build.sh: Do not try to rewrite gcc, it is hidden and so will not
be rewritten, as per eee95b5a879b7096dffd533f24107cf8926b621e.  Instead, try
to build grep with coreutils rewritten to hello.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/tests/guix-build.sh?id=37dd69b44511dc73eb04bdebe8d82c9a0386338e'>tests: Fix checks for expected failures.</a><span class='msg-avail'>...<span class='msg-tooltip'>Addresses &lt;https://issues.guix.gnu.org/62406&gt;.

With 'set -e', a return status inverted with '!' does not cause the shell to
exit immediately.  Instead use '&amp;&amp; false' to indicate an expected failure.

* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh,
tests/guix-environment-container.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-home.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh, tests/guix-refresh.sh, tests/guix-shell.sh,
tests/guix-style.sh, tests/guix-system.sh: Replace uses of '! ...' with
'... &amp;&amp; false' or `test ! ...` as appropriate.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2022-02-18 14:14:38 +0100'>2022-02-18</span></td><td><a href='/guix/commit/tests/guix-build.sh?id=0ca26437cb36822f9f74ee1a6dbc714477378b13'>guix build: Warn when attempting to build an unsupported package.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/51801&gt;.
Reported by Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;.

* guix/scripts/build.scm (options-&gt;derivations)[warn-if-unsupported]:
New procedure.
[compute-derivation]: Use it.
* tests/guix-build.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>