;;; 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)))
5baf68a746a0484ca0b45e45b0964b'>gnu: Update URLs for sourceforge.net.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2015-03-05 10:23:07 +0100'>2015-03-05</span></td><td><a href='/guix/commit/gnu/packages/djvu.scm?id=1a8bf1dc41d37f217828b7d0f2c61707ee028111'>gnu: Add djvulibre.</a><span class='msg-avail'>...</span></td><td>Paul van der Walt</td></tr>
d>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-16 23:56:56 +0100'>2022-01-16</span></td><td><a href='/guix/commit/etc/completion/bash?id=e35deac9e7379605c0e3918e74a6d153861a4aa2'>bash completion: Fix options completion.</a><span class='msg-avail'>...</span></td><td>Fulbert</td></tr>
<tr><td><span title='2021-12-08 21:09:55 +0100'>2021-12-08</span></td><td><a href='/guix/commit/etc/completion/bash?id=f3af1fb0bcbcbe18ab773374efe606e90107cfb6'>bash completion: Complete ‘guix shell -f’.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-31 00:57:07 +0200'>2021-10-31</span></td><td><a href='/guix/commit/etc/completion/bash?id=8e6989fcaf4a6de00e799777e2a0ccb90fc05e59'>bash completion: Complete top-level options.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-31 00:57:07 +0200'>2021-10-31</span></td><td><a href='/guix/commit/etc/completion/bash?id=0987a0eba4e8220e98e93686a4ad3ef87433fb2f'>bash completion: Don't hard-code "guix" binary name.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-25 18:58:18 +0200'>2021-10-25</span></td><td><a href='/guix/commit/etc/completion/bash?id=80edb7df6586464aa40e84e103f0045452de95db'>Add 'guix shell'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-03 19:23:49 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=ed14bc298470f77f4ffacdc315ae87939f81c765'>bash completion: Fix ‘system’ &amp; ‘container’ subcommands.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-03 19:23:49 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=d71cfaea3006bc02dc6d309d916809e1f799f04e'>bash completion: Complete ‘guix size’ file names.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-03 19:23:48 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=9e3355d2a35796276d17af13ac45814dbf6c4203'>bash completion: Complete ‘guix build’ file names.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-03 19:23:48 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=ee5e4779e21b6eaf3229ab4201e731d8dde7e4b2'>bash completion: Complete ‘guix weather’ packages.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-03 19:23:48 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=17f76b209ceca9972dcd375d2a0f869abc6d1f26'>bash completion: Append to $COMPREPLY where possible.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-10-03 19:23:48 +0200'>2021-10-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=6fba67df1928a62abc7939bd8ff020e998ad8d6b'>bash completion: Consolidate similar $command ‘if’ branches.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-06-16 12:13:39 +0200'>2021-06-16</span></td><td><a href='/guix/commit/etc/completion/bash?id=fa0dc1229c0dc44a7358d183e54d9e02d1199e39'>bash_completion: Complete options for ‘guix environment’.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-06-16 12:13:39 +0200'>2021-06-16</span></td><td><a href='/guix/commit/etc/completion/bash?id=dc3ba8c83602d69294e21d1b0c066f0d89890b56'>bash completion: Complete options for the right command.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-06-16 12:13:39 +0200'>2021-06-16</span></td><td><a href='/guix/commit/etc/completion/bash?id=80a17aae7991c6df061a98bb71734485f4ca17e2'>bash completion: Really support subcommands.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>