From d30fb94c72d4fd1d2512a6a40020629c6ae15a2b Mon Sep 17 00:00:00 2001
From: Paul Gauthier <aider@paulg.org>
Date: Wed, 5 Jul 2023 20:48:09 -0700
Subject: [PATCH] refactor to use io.read_text

---
 aider/coders/wholefile_func_coder.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/aider/coders/wholefile_func_coder.py b/aider/coders/wholefile_func_coder.py
index f45ef48a7..5c7cbd6ae 100644
--- a/aider/coders/wholefile_func_coder.py
+++ b/aider/coders/wholefile_func_coder.py
@@ -101,8 +101,11 @@ class WholeFileFunctionCoder(Coder):
         # ending an existing block
         full_path = os.path.abspath(os.path.join(self.root, fname))
 
-        with open(full_path, "r") as f:
-            orig_lines = f.readlines()
+        content = self.io.read_text(full_path)
+        if content is None:
+            orig_lines = []
+        else:
+            orig_lines = content.splitlines()
 
         show_diff = diffs.diff_partial_update(
             orig_lines,