X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FMsgmap.pm;h=8fe17a9505f0db151fe8c7f8f67ff9170b54e0b9;hb=2c69f7bc34a2b12dc7f55e2bb24fa28565f24f03;hp=8a34e7e0c713a4036cd156de22795a525320e5d7;hpb=709a1979302ef5dbb40babb84821b079868490a1;p=public-inbox.git

diff --git a/lib/PublicInbox/Msgmap.pm b/lib/PublicInbox/Msgmap.pm
index 8a34e7e0..8fe17a95 100644
--- a/lib/PublicInbox/Msgmap.pm
+++ b/lib/PublicInbox/Msgmap.pm
@@ -1,6 +1,12 @@
 # Copyright (C) 2015 all contributors <meta@public-inbox.org>
 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
-# bidirectional Message-ID <-> Article Number mapping
+
+# bidirectional Message-ID <-> Article Number mapping for the NNTP
+# and web interfaces.  This is required for implementing stable article
+# numbers for NNTP and allows prefix lookups for partial Message-IDs
+# in case URLs get truncated from copy-n-paste errors by users.
+#
+# This is maintained by ::SearchIdx
 package PublicInbox::Msgmap;
 use strict;
 use warnings;
@@ -19,6 +25,7 @@ sub new {
 		AutoCommit => 1,
 		RaiseError => 1,
 		PrintError => 0,
+		ReadOnly => !$writable,
 		sqlite_use_immediate_transaction => 1,
 	});
 	$dbh->do('PRAGMA case_sensitive_like = ON');