release_note_diff.py

import argparse
from pathlib import Path

IMPORTANT_WORDS = ["fix", "fixed", "launch", "launched", "deprecate", "deprecated", "limit", "support", "breaking"]


def read_lines(path):
    return [line.strip() for line in Path(path).read_text().splitlines() if line.strip()]


def diff_lines(old_lines, new_lines):
    old_set = set(old_lines)
    new_set = set(new_lines)
    added = [line for line in new_lines if line not in old_set]
    removed = [line for line in old_lines if line not in new_set]
    important = [line for line in added if any(word in line.lower() for word in IMPORTANT_WORDS)]
    return {
        "added": added,
        "removed": removed,
        "important": important,
    }


def format_report(result):
    lines = []
    lines.append(f"Added: {len(result['added'])}")
    lines.append(f"Removed: {len(result['removed'])}")
    lines.append(f"Important additions: {len(result['important'])}")
    if result["important"]:
        lines.append("")
        lines.append("Important additions:")
        for item in result["important"]:
            lines.append(f"- {item}")
    return "\n".join(lines)


def main():
    parser = argparse.ArgumentParser(description="Diff two release note files.")
    parser.add_argument("old_file")
    parser.add_argument("new_file")
    args = parser.parse_args()

    old_lines = read_lines(args.old_file)
    new_lines = read_lines(args.new_file)
    result = diff_lines(old_lines, new_lines)
    print(format_report(result))


if __name__ == "__main__":
    main()