From 45be57da2aa2f54ab797319b70793c1486a1a261 Mon Sep 17 00:00:00 2001
From: Xie Yanbo <xieyanbo@gmail.com>
Date: Wed, 6 Nov 2024 17:07:17 +0800
Subject: [PATCH] Avoid crash if not provide book_name

---
 book_maker/cli.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/book_maker/cli.py b/book_maker/cli.py
index 5404b5f..0f7043a 100644
--- a/book_maker/cli.py
+++ b/book_maker/cli.py
@@ -325,8 +325,11 @@ So you are close to reaching the limit. You have to choose your own value, there
 
     options = parser.parse_args()
 
+    if not options.book_name:
+        print(f"Error: please provide the path of your book using --book_name <path>")
+        exit(1)
     if not os.path.isfile(options.book_name):
-        print(f"Error: {options.book_name} does not exist.")
+        print(f"Error: the book {options.book_name!r} does not exist.")
         exit(1)
 
     PROXY = options.proxy