;;; copyright.el --- Insert a Guix copyright.

;; Copyright © 2020 Oleg Pykhalov <go.wigust@gmail.com>

;; 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 this program.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This package provides skeleton to insert a copyright with `guix-copyright'.

;;; Code:

(define-skeleton guix-copyright
  "Insert a copyright by $USER notice at cursor."
  "FULL_NAME <MAIL_ADDRESS>: "
  comment-start
  ";; Copyright © " `(format-time-string "%Y") " "
  (or (format "%s <%s>" user-full-name user-mail-address) str)
  comment-end)

;;; copyright.el ends here
1e783f167c86c768c86f66e2b582208172da61'>refs</a><a class='active' href='/guix/log/nix/libstore/local-store.hh'>log</a><a href='/guix/tree/nix/libstore/local-store.hh?id=c21e783f167c86c768c86f66e2b582208172da61'>tree</a><a href='/guix/commit/nix/libstore/local-store.hh?id=c21e783f167c86c768c86f66e2b582208172da61'>commit</a><a href='/guix/diff/nix/libstore/local-store.hh?id=c21e783f167c86c768c86f66e2b582208172da61'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/local-store.hh'>
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<div class='path'>path: <a href='/guix/log/?id=c21e783f167c86c768c86f66e2b582208172da61'>root</a>/<a href='/guix/log/nix?id=c21e783f167c86c768c86f66e2b582208172da61'>nix</a>/<a href='/guix/log/nix/libstore?id=c21e783f167c86c768c86f66e2b582208172da61'>libstore</a>/<a href='/guix/log/nix/libstore/local-store.hh?id=c21e783f167c86c768c86f66e2b582208172da61'>local-store.hh</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/nix/libstore/local-store.hh?id=c21e783f167c86c768c86f66e2b582208172da61&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-11-16 14:34:28 +0100'>2021-11-16</span></td><td><a href='/guix/commit/nix/libstore/local-store.hh?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>