This file was generated by ChatGPT on 2025-09-03

ensure_final_newline.py

import os
import pathlib
import sys

def ensure_final_newline(root_dir=".", extension=".cs"):
    """
    Ensures that all files with the given extension under root_dir
    end with exactly one newline.
    """
    if not extension.startswith("."):
        extension = "." + extension  # normalize

    root = pathlib.Path(root_dir)
    files = list(root.rglob(f"*{extension}"))

    for file in files:
        with open(file, "rb") as f:
            content = f.read()

        # Normalize line endings to LF for check
        text = content.decode("utf-8", errors="ignore")

        # Strip all trailing newlines, then add exactly one
        fixed = text.rstrip("\r\n") + "\n"

        if text != fixed:
            with open(file, "w", encoding="utf-8", newline="\n") as f:
                f.write(fixed)
            print(f"Fixed: {file}")
        else:
            print(f"OK: {file}")

if __name__ == "__main__":
    # Usage: python script.py [root_dir] [extension]
    root_dir = sys.argv[1] if len(sys.argv) > 1 else "."
    extension = sys.argv[2] if len(sys.argv) > 2 else ".cs"
    ensure_final_newline(root_dir, extension)