From 16bf7b4b89b5ceb7f13ed318051ecd7c629d582b Mon Sep 17 00:00:00 2001
From: David Bremner <bremner@debian.org>
Date: Wed, 20 Feb 2013 18:24:37 -0400
Subject: [PATCH] nmbug: allow empty prefix

Current code does not distinguish between an empty string in the
NMBPREFIX environment variable and the variable being undefined. This
makes it impossible to define an empty prefix, if, e.g. somebody wants
to dump all of their tags with nmbug.
---
 devel/nmbug/nmbug | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/devel/nmbug/nmbug b/devel/nmbug/nmbug
index b9c70e4b..90d98b63 100755
--- a/devel/nmbug/nmbug
+++ b/devel/nmbug/nmbug
@@ -13,7 +13,7 @@ my $NMBGIT = $ENV{NMBGIT} || $ENV{HOME}.'/.nmbug';
 
 $NMBGIT .= '/.git' if (-d $NMBGIT.'/.git');
 
-my $TAGPREFIX = $ENV{NMBPREFIX} || 'notmuch::';
+my $TAGPREFIX = defined($ENV{NMBPREFIX}) ? $ENV{NMBPREFIX} : 'notmuch::';
 
 # for encoding
 
-- 
2.43.0