Improve exception handling

src/util/github.py

@@ -34,23 +34,30 @@ async def fetch_github_file(url: str, target_path: str) -> None:
              - https://github.com/owner/repo/tree/branch/path/to/file
         target_path: Path where to store the file
     """
-    # Convert web URL to raw content URL
-    raw_url = url.replace("github.com", "raw.githubusercontent.com").replace("/blob/", "/").replace("/tree/", "/")
-
-    # Fetch file content
-    headers = await get_headers()
-    async with aiohttp.ClientSession() as session:
-        async with session.get(raw_url, headers=headers) as response:
-            if response.status != 200:
-                raise Exception(f"GitHub fetch error: Status code {response.status} for URL {raw_url}")
-            content = await response.text()
-
-    # Create target directory if it doesn't exist
-    os.makedirs(os.path.dirname(target_path), exist_ok=True)
-
-    # Write the content to the file
-    async with aiofiles.open(target_path, "w") as f:
-        await f.write(content)
+    try:
+        # Convert web URL to raw content URL
+        raw_url = url.replace("github.com", "raw.githubusercontent.com").replace("/blob/", "/").replace("/tree/", "/")
+
+        # Fetch file content
+        headers = await get_headers()
+        async with aiohttp.ClientSession() as session:
+            async with session.get(raw_url, headers=headers) as response:
+                if response.status != 200:
+                    raise Exception(f"GitHub fetch error: Status code {response.status} for URL {raw_url}")
+                content = await response.text()
+
+        # Create target directory if it doesn't exist
+        os.makedirs(os.path.dirname(target_path), exist_ok=True)
+
+        # Write the content to the file
+        async with aiofiles.open(target_path, "w") as f:
+            await f.write(content)
+
+        return None  # Explicit return to ensure coroutine
+
+    except Exception as e:
+        logger.error(f"Error fetching GitHub file {url}: {str(e)}")
+        raise  # Re-raise to handle in caller
 
 
 async def fetch_github_repo(url: str, target_path: str) -> None: