;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Vincent Legoll <vincent.legoll@gmail.com>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2018, 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; 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 packages musl)
  #:use-module (guix download)
  #:use-module (guix packages)
  #:use-module (guix build-system gnu)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (gnu packages))

(define-public musl
  (package
    (name "musl")
    (version "1.2.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://www.musl-libc.org/releases/"
                                  "musl-" version ".tar.gz"))
              (sha256
               (base32
                "1p8r6bac64y98ln0wzmnixysckq3crca69ys7p16sy9d04i975lv"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; musl has no tests
       #:configure-flags
       (list "--disable-gcc-wrapper")))
    (synopsis "Small C standard library")
    (description "musl is a simple and lightweight C standard library.  It
strives to be correct in the sense of standards-conformance and safety.")
    (home-page "https://musl.libc.org")
    ;; Musl as a whole is released under the Expat license.  Parts of it are
    ;; derived from various third-party projects that are released under
    ;; non-copyleft licenses.  See the COPYRIGHT file for details.
    (license license:expat)))
89d7d9'>root</a>/<a href='/guix/log/tests?id=d0e3fd2dc42c3bcba96fd8e4256b1283d589d7d9'>tests</a>/<a href='/guix/log/tests/store-deduplication.scm?id=d0e3fd2dc42c3bcba96fd8e4256b1283d589d7d9'>store-deduplication.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/store-deduplication.scm?id=d0e3fd2dc42c3bcba96fd8e4256b1283d589d7d9&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-10 10:56:48 +0100'>2022-12-10</span></td><td><a href='/guix/commit/tests/store-deduplication.scm?id=b129026e2e242e9068158ae6e6fcd8d7c5ea092e'>deduplicate: Use 'sendfile' for small file copies.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/store/deduplication.scm (dump-file/deduplicate): Use 'sendfile'
instead of 'dump-port'.
* tests/store-deduplication.scm ("copy-file/deduplicate, below %deduplication-minimum-size"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-16 14:34:28 +0100'>2021-11-16</span></td><td><a href='/guix/commit/tests/store-deduplication.scm?id=472a0e82a52a3d5d841e1dfad6b13e26082a5750'>daemon: Do not deduplicate files smaller than 8 KiB.</a><span class='msg-avail'>...<span class='msg-tooltip'>Files smaller than 8 KiB typically represent ~70% of the entries in
/gnu/store/.links but only contribute to ~4% of the space savings
afforded by deduplication.

Not considering these files for deduplication speeds up file insertion
in the store and, more importantly, leaves 'removeUnusedLinks' with
fewer entries to traverse, thereby speeding it up proportionally.

Partly fixes &lt;https://issues.guix.gnu.org/24937&gt;.

* config-daemon.ac: Remove symlink hard link check and CAN_LINK_SYMLINK
definition.
* guix/store/deduplication.scm (%deduplication-minimum-size): New
variable.
(deduplicate)[loop]: Do not recurse when FILE's size is below
%DEDUPLICATION-MINIMUM-SIZE.
(dump-port): New procedure.
(dump-file/deduplicate)[hash]: Turn into...
[dump-and-compute-hash]: ... this thunk.
Call 'deduplicate' only when SIZE is greater than
%DEDUPLICATION-MINIMUM-SIZE; otherwise call 'dump-port'.
* nix/libstore/gc.cc (LocalStore::removeUnusedLinks): Drop files where
st.st_size &lt; deduplicationMinSize.
* nix/libstore/local-store.hh (deduplicationMinSize): New declaration.
* nix/libstore/optimise-store.cc (deduplicationMinSize): New variable.
(LocalStore::optimisePath_): Return when PATH is a symlink or smaller
than 'deduplicationMinSize'.
* tests/derivations.scm ("identical files are deduplicated"): Produce
files bigger than %DEDUPLICATION-MINIMUM-SIZE.
* tests/nar.scm ("restore-file-set with directories (signed, valid)"):
Likewise.
* tests/store-deduplication.scm ("deduplicate, below %deduplication-minimum-size"):
New test.
("deduplicate", "deduplicate, ENOSPC"): Produce files bigger than
%DEDUPLICATION-MINIMUM-SIZE.
* tests/store.scm ("substitute, deduplication"): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>