AutoSplit will fail to create an index for files whose modification time is 0
because its default time for a non-existent index is 1.  Set this default time
to -1 instead.

--- perl-5.16.1/cpan/AutoLoader/lib/AutoSplit.pm.orig	2012-02-14 22:44:36.000000000 -0600
+++ perl-5.16.1/cpan/AutoLoader/lib/AutoSplit.pm	2015-09-09 19:59:22.208708921 -0500
@@ -361,7 +361,7 @@
     my($al_idx_file) = catfile($autodir, $modpname, $IndexFile);
 
     if ($check_mod_time){
-	my($al_ts_time) = (stat("$al_idx_file"))[9] || 1;
+	my($al_ts_time) = (stat("$al_idx_file"))[9] || -1;
 	if ($al_ts_time >= $pm_mod_time and
 	    $al_ts_time >= $self_mod_time){
 	    print "AutoSplit skipped ($al_idx_file newer than $filename)\n"
;'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>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=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>tree</a><a href='/guix/commit/nix/libstore/local-store.hh?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>commit</a><a href='/guix/diff/nix/libstore/local-store.hh?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/local-store.hh'>
<input type='hidden' name='id' value='7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>root</a>/<a href='/guix/log/nix?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>nix</a>/<a href='/guix/log/nix/libstore?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>libstore</a>/<a href='/guix/log/nix/libstore/local-store.hh?id=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a'>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=7ae51b741a6b73d3b2730389ed5291e00d7e5c0a&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>
<tr><td><span title='2020-12-08 22:30:08 +0100'>2020-12-08</span></td><td><a href='/guix/commit/nix/libstore/local-store.hh?id=a618a8c6203d4cf57f12873a86797b8685b11e14'>daemon: Factorize substituter agent spawning.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/local-store.hh (class LocalStore)[substituter]: New
method.
[runningSubstituter]: Turn into a shared_ptr.
* nix/libstore/local-store.cc (LocalStore::querySubstitutablePaths):
Call 'substituter' instead of using inline code.
(LocalStore::querySubstitutablePathInfos): Likewise.
(LocalStore::substituter): New method.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-12-08 22:30:08 +0100'>2020-12-08</span></td><td><a href='/guix/commit/nix/libstore/local-store.hh?id=79c6614f58a57b985daf8940766319e440311db0'>daemon: Use 'Agent' to spawn 'guix substitute --query'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/local-store.hh (RunningSubstituter): Remove.
(LocalStore)[runningSubstituter]: Change to unique_ptr&lt;Agent&gt;.
[setSubstituterEnv, didSetSubstituterEnv]: Remove.
[getLineFromSubstituter, getIntLineFromSubstituter]: Take an 'Agent'.
* nix/libstore/local-store.cc (LocalStore::~LocalStore): Remove
reference to 'runningSubstituter'.
(LocalStore::setSubstituterEnv, LocalStore::startSubstituter): Remove.
(LocalStore::getLineFromSubstituter): Adjust to 'run' being an 'Agent'.
(LocalStore::querySubstitutablePaths): Spawn substituter agent if
needed.  Adjust to 'Agent' interface.
(LocalStore::querySubstitutablePathInfos): Likewise.
* nix/libstore/build.cc (SubstitutionGoal::tryToRun): Remove call to
'setSubstituterEnv' and add 'setenv' call for "_NIX_OPTIONS" instead.
(SubstitutionGoal::finished): Remove 'readLine' call for 'dummy'.
* guix/scripts/substitute.scm (%allow-unauthenticated-substitutes?):
Remove second argument to 'make-parameter'.
(process-query): Call 'warn-about-missing-authentication'
when (%allow-unauthenticated-substitutes?) is #t.
(guix-substitute): Wrap body in 'parameterize'.  Set 'guix-warning-port'
too.  No longer exit when 'substitute-urls' returns the empty list.  No
longer print newline initially.
* tests/substitute.scm (test-quit): Parameterize 'current-error-port' to
account for the port changes in 'guix-substitute'.
</span></span></td><td>Ludovic Courtès</td></tr>