maildir-zero: allow configuring in a config file

maildir-zero

@@ -7,7 +7,7 @@ from __future__ import division, print_function
 import os
 import os.path
 import re
-
+import yaml
 
 def maildirs(startdir):
     for dirpath, dirnames, _ in os.walk(startdir):
@@ -35,9 +35,15 @@ def mailbox_name(maildir, root):
         return name
 
 
-ignore_zero = True
-ignore = [r'spam']
-sort_by_count = True
+config_filename = '~/.config/maildir-zero.yml'
+config = {}
+try:
+    config = yaml.load(open(os.path.expanduser(config_filename)))
+except:
+    pass
+ignore_zero = config.setdefault('ignore_zero', True)
+ignore = config.setdefault('ignore', [r'spam'])
+sort_by_count = config.setdefault('sort_by_count', True)
 
 
 root = os.path.expanduser('~/Maildir')