;;; 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)))
eecb5c02f75a6e1ddc0cc295e0e4f8'>Update email address for Amin Bandali.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Add name and email addresses for Amin Bandali.
* gnu/local.mk, gnu/packages/emacs-xyz.scm, gnu/packages/emacs.scm,
gnu/packages/fpga.scm, gnu/packages/lean.scm, gnu/packages/maths.scm:
Update email address for Amin Bandali.

Signed-off-by: Tobias Geerinckx-Rice &lt;me@tobias.gr&gt;
</span></span></td><td>Amin Bandali</td></tr>
<tr><td><span title='2019-11-03 18:27:21 +0100'>2019-11-03</span></td><td><a href='/guix/commit/gnu/packages/fpga.scm?id=922c84867ae15a55e3ab3b5060afa50959bce99e'>gnu: yosys: Update to 0.9.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/fpga.scm (yosys): Update to 0.9.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-08-26 15:56:32 +0200'>2019-08-26</span></td><td><a href='/guix/commit/gnu/packages/fpga.scm?id=f27cb0f1dd5ba445e9fef982b0e8554c0af84aee'>gnu: iverilog: Update to 10.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/fpga.scm (iverilog): Update to 10.3.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-06-08 07:30:26 +0200'>2019-06-08</span></td><td><a href='/guix/commit/gnu/packages/fpga.scm?id=7e6764c1d290a4233a34b5e6751c6d89f05823a6'>gnu: gtkwave: Update to 3.3.101.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/fpga.scm (gtkwave): Update to 3.3.101.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-04-17 06:15:36 +0200'>2019-04-17</span></td><td><a href='/guix/commit/gnu/packages/fpga.scm?id=38dd8b60585fea6749a4fcd35ce167bdee8fb2e6'>gnu: gtkwave: Update to 3.3.100.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/fpga.scm (gtkwave): Update to 3.3.100.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-04-17 06:12:48 +0200'>2019-04-17</span></td><td><a href='/guix/commit/gnu/packages/fpga.scm?id=315d7dda35b62b9b6c93cc9e655fb35125fcf45c'>gnu: gtkwave: Don't use NAME in source URI.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/fpga.scm (gtkwave)[source]: Hard-code NAME.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>