SDL: rename_symbols: only write new file if contents have changed

SDL Commits
1 
From 406c8b79fe767b48da5a2d420eb5227db7cee899 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Wed, 4 Jan 2023 10:40:30 -0800
Subject: [PATCH] rename_symbols: only write new file if contents have changed

Also don't stop for other exceptions, just print them and keep going
---
 build-scripts/rename_symbols.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/build-scripts/rename_symbols.py b/build-scripts/rename_symbols.py
index 2c53d224bc75..ab65c60a1ea8 100755
--- a/build-scripts/rename_symbols.py
+++ b/build-scripts/rename_symbols.py
@@ -78,11 +78,15 @@ def create_substring_regex_from_replacements(replacements):
 def replace_symbols_in_file(file, regex, replacements):
     try:
         with file.open("r", encoding="UTF-8", newline="") as rfp:
-            contents = regex.sub(lambda mo: replacements[mo.string[mo.start():mo.end()]], rfp.read())
-            with file.open("w", encoding="UTF-8", newline="") as wfp:
-                wfp.write(contents)
+            original = rfp.read()
+            contents = regex.sub(lambda mo: replacements[mo.string[mo.start():mo.end()]], original)
+            if contents != original:
+                with file.open("w", encoding="UTF-8", newline="") as wfp:
+                    wfp.write(contents)
     except UnicodeDecodeError:
         print("%s is not text, skipping" % file)
+    except Exception as err:
+        print("%s" % err)
 
 
 def replace_symbols_in_dir(path, regex, replacements):