From 686fd652c383c8f4bbcb1fba77c2b3797435627f Mon Sep 17 00:00:00 2001
From: Russell Keith-Magee <russell@keith-magee.com>
Date: Wed, 19 Apr 2017 20:39:47 +0800
Subject: [PATCH] Added check for existing directory.

---
 briefcase/app.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/briefcase/app.py b/briefcase/app.py
index 2c806b5c7..916e74e6c 100644
--- a/briefcase/app.py
+++ b/briefcase/app.py
@@ -4,6 +4,7 @@
 import json
 import random
 import re
+import shutil
 import sys
 import uuid
 from urllib.error import URLError
@@ -261,6 +262,24 @@ def post_run(self):
         print("Installation complete.")
 
     def run(self):
+        if os.path.exists(self.dir):
+            print()
+            if os.path.isdir(self.dir):
+                confirm = input("A directory named '%s' already exists. Would you like to replace it (y/N)? " % self.dir)
+            else:
+                confirm = input("A file named '%s' already exists. Would you like to delete it (y/N)? " % self.dir)
+
+            print()
+            if confirm in ['y', 'Y']:
+                print(" * Deleting existing content...")
+                if os.path.isdir(self.dir):
+                    shutil.rmtree(self.dir)
+                else:
+                    os.remove(self.dir)
+            else:
+                print("Briefcase deployment cancelled.")
+                return
+
         self.generate_app_template()
         self.install_app_requirements()
         self.install_platform_requirements()