Require --source correctly

Non-empty value is not acceptable

1 files changed, 4 insertions, 0 deletions

diff --git a/jt b/jt
index 300a02d..a453368 100755
--- a/jt
+++ b/jt
@@ -79,6 +79,10 @@ class JournalTool(cliapp.Application):
         self.settings.require('source')
         self.settings.require('layout')
 
+        if not self.settings['source']:
+            raise cliapp.AppException(
+                'The --source setting is empty or missing.')
+
         if not os.path.exists(self.drafts_dir()):
             os.mkdir(self.drafts_dir())