From: Eric Wong <e@80x24.org>
Date: Sat, 7 Nov 2020 10:56:52 +0000 (+0000)
Subject: extsearchidx: avoid needless alternates rewrite in ALL.git
X-Git-Tag: v1.7.0~1646
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=ba071011a2bfa70f4ab8df87d186e33971ef85e1;p=public-inbox.git

extsearchidx: avoid needless alternates rewrite in ALL.git

As with fill_alternates in V2Writable, we do not need to update
$GIT_DIR/objects/info/alternates if nothing is changed.
---

diff --git a/lib/PublicInbox/ExtSearchIdx.pm b/lib/PublicInbox/ExtSearchIdx.pm
index 9d576adb..9da42538 100644
--- a/lib/PublicInbox/ExtSearchIdx.pm
+++ b/lib/PublicInbox/ExtSearchIdx.pm
@@ -380,8 +380,11 @@ sub idx_init { # similar to V2Writable
 		$new{$line} = 1;
 		push @new, $line;
 	}
-	push @old, @new;
-	PublicInbox::V2Writable::write_alternates($info_dir, $mode, \@old);
+	if (scalar @new) {
+		push @old, @new;
+		my $o = \@old;
+		PublicInbox::V2Writable::write_alternates($info_dir, $mode, $o);
+	}
 	$self->parallel_init($self->{indexlevel});
 	$self->umask_prepare;
 	$self->with_umask(\&PublicInbox::V2Writable::_idx_init, $self, $opt);