From df1d5e02891139f323704e90759d457413c7d767 Mon Sep 17 00:00:00 2001
From: Taka <taka@vm-linux-dev>
Date: Wed, 3 May 2017 11:23:36 +0000
Subject: [PATCH] Delete the database file if extraction failed to find
 anything at all.

---
 startup_widget.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/startup_widget.py b/startup_widget.py
index 0b584e5..922095d 100644
--- a/startup_widget.py
+++ b/startup_widget.py
@@ -65,6 +65,10 @@ class AnalyzeThread( QThread ) :
             self.completed_signal.emit( "" )
         finally :
             db.close_database()
+            if total_cards <= 0 :
+                # NOTE: If we extracted nothing (e.g. because Ghostscript isn't installed), we delete the database
+                # so that we don't start up next time with an empty database.
+                os.unlink( self.db_fname )
 
     def on_error( self , msg ) :
         """Show the user an error message."""