fish: Add fix_fish_history

Signed-off-by: Nathan Chancellor <[email protected]>

fish/functions/fix_fish_history.fish

@@ -0,0 +1,11 @@
+#!/usr/bin/env fish
+# SPDX-License-Identifier: MIT
+# Copyright (C) 2024 Nathan Chancellor
+
+function fix_fish_history -d "Remove NUL bytes to workaround https://github.com/fish-shell/fish-shell/issues/10300"
+    python3 -c "from pathlib import Path
+fish_history = Path.home() / '.local/share/fish/fish_history'
+history_bytes = fish_history.read_bytes()
+if (nul := b'\x00') in history_bytes:
+    fish_history.write_bytes(history_bytes.replace(nul, b''))"
+end