;;; 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)))
sg-tooltip'>* tests/records.scm ("match-record, ellipsis in body"): New test.
</span></span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2023-06-04 10:59:25 +0200'>2023-06-04</span></td><td><a href='/guix/commit/tests/records.scm?id=4cd529362108086eeec25d4d465261415cff45b3'>records: Add MATCH-RECORD-LAMBDA.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/records.scm (match-record-lambda): New syntax.
* tests/records.scm ("match-record-lambda"): New test.

Signed-off-by: Josselin Poiret &lt;dev@jpoiret.xyz&gt;
</span></span></td><td>(unmatched-parenthesis ew syntax</td></tr>
<tr><td><span title='2023-06-04 10:34:35 +0200'>2023-06-04</span></td><td><a href='/guix/commit/tests/records.scm?id=b88e38d4b51b9aa0e857baeb614c000e491ad309'>records: match-record: Support thunked and delayed fields.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/records.scm (match-record): Unwrap matched thunked and delayed fields.
* tests/records.scm ("match-record, thunked field",
"match-record, delayed field"): New tests.

Signed-off-by: Josselin Poiret &lt;dev@jpoiret.xyz&gt;
</span></span></td><td>(unmatched-parenthesis d</td></tr>
<tr><td><span title='2022-12-27 23:53:42 +0100'>2022-12-27</span></td><td><a href='/guix/commit/tests/records.scm?id=363b20b68584d71556c2d8912dd07cbdacabdb25'>records: match-record supports specifying a different variable name.</a><span class='msg-avail'>...<span class='msg-tooltip'>An example:

(match-record obj &lt;my-type&gt;
  (field1 (field2 custom-var-name) field3)
  ...)

* guix/records.scm (match-record-inner): Add support for the new syntax.
* tests/records.scm ("match-record, simple"): Add a simple test case for the
new syntax.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Attila Lendvai</td></tr>
<tr><td><span title='2022-12-02 00:02:12 +0100'>2022-12-02</span></td><td><a href='/guix/commit/tests/records.scm?id=7c1161dba4c8930d3a500a72ccaaaf50df73f466'>records: 'match-record' checks fields at macro-expansion time.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows 'match-record' to be more efficient (field offsets are
computed at compilation time) and to report unknown fields at
macro-expansion time.

* guix/records.scm (map-fields): New macro.
(define-record-type*)[rtd-identifier]: New procedure.
Define TYPE as a macro and use a separate identifier for the RTD.
(lookup-field, match-record-inner): New macros.
(match-record): Rewrite in terms of 'match-error-inner'.
* tests/records.scm ("match-record, simple")
("match-record, unknown field"): New tests.
* gnu/services/cuirass.scm (cuirass-shepherd-service): Rename 'log-file'
local variable to 'main-log-file'.
* gnu/services/getmail.scm (serialize-getmail-configuration-file): Move
after &lt;getmail-configuration-file&gt; definition.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-07-01 12:10:29 +0200'>2022-07-01</span></td><td><a href='/guix/commit/tests/records.scm?id=741895676b124a8a9a6656a54b5b58fd35d8e0f9'>tests: Add sanitizer test.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/records.scm ("define-record-type* &amp; sanitize without default
value"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>