From 943ec015da20090a1ad42fb01f82817c86fd88d9 Mon Sep 17 00:00:00 2001
From: Simon McVittie <smcv@debian.org>
Date: Sun, 1 Mar 2015 14:56:45 +0000
Subject: If neither timezone nor TZ is set, set both to :/etc/localtime if
 we're on a GNU system and that file exists, or GMT otherwise

---
 IkiWiki.pm | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'IkiWiki.pm')

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 7afd57993..f414996db 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -619,9 +619,20 @@ sub checkconfig () {
 	if (defined $config{timezone} && length $config{timezone}) {
 		$ENV{TZ}=$config{timezone};
 	}
-	else {
+	elsif (defined $ENV{TZ} && length $ENV{TZ}) {
 		$config{timezone}=$ENV{TZ};
 	}
+	else {
+		eval q{use Config qw()};
+		error($@) if $@;
+
+		if ($Config::Config{d_gnulibc} && -e '/etc/localtime') {
+			$config{timezone}=$ENV{TZ}=':/etc/localtime';
+		}
+		else {
+			$config{timezone}=$ENV{TZ}='GMT';
+		}
+	}
 
 	if ($config{w3mmode}) {
 		eval q{use Cwd q{abs_path}};
-- 
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