From 2c3df2c80a5f36657966c35afcf69b286b6948bf Mon Sep 17 00:00:00 2001
From: Avery Pennarun <apenwarr@gmail.com>
Date: Sat, 13 Nov 2010 01:08:28 -0800
Subject: [PATCH] Don't throw a weird exception if REDO_BASE isn't set.

---
 vars.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/vars.py b/vars.py
index e286bd3..ca048ff 100644
--- a/vars.py
+++ b/vars.py
@@ -4,6 +4,8 @@ TARGET = os.environ.get('REDO_TARGET', '')
 DEPTH = os.environ.get('REDO_DEPTH', '')
 DEBUG = os.environ.get('REDO_DEBUG', '') and 1 or 0
 VERBOSE = os.environ.get('REDO_VERBOSE', '') and 1 or 0
-BASE = os.path.abspath(os.environ['REDO_BASE'])
-while BASE.endswith('/'):
-    BASE = BASE[:-1]
+BASE = os.environ.get('REDO_BASE', '')
+if BASE:
+    BASE = os.path.abspath(BASE)
+    while BASE and BASE.endswith('/'):
+        BASE = BASE[:-1]