add path argument for secret

raps.py

@@ -30,15 +30,18 @@ def generate_seed(secret):
 def main():
     import argparse
     parser = argparse.ArgumentParser(prog='Remote Admin Password Solution', description='Generate rotating passwords based on a shared secret')
+    parser.add_argument('--secret', action='store', help='path to secret file')
     parser.add_argument('--new-secret', action='store_true', help='generate a new secret')
 
     args = parser.parse_args()
 
+    secret_path = args.secret if args.secret else SECRET_FILE
+
     secret = ''
-    if not os.path.isfile(SECRET_FILE) or args.new_secret:
+    if not os.path.isfile(secret_path) or args.new_secret:
         print('Generating a new secret... ', end='')
         secret = create_secret()
-        with open(SECRET_FILE, 'w') as f:
+        with open(secret_path, 'w') as f:
             f.write(secret)
         print('done. Send this to the other party:')
         print(secret)