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#!/usr/bin/env python3
"""Print the description used for GitHub Releases."""
from __future__ import annotations
import re
from pathlib import Path
TAG_BANNER = r"## \[\d+\.\d+\.\d+\S*\] - \d+-\d+-\d+\n"
RE_BODY = re.compile(rf".*?{TAG_BANNER}(.*?){TAG_BANNER}", re.DOTALL)
RE_SECTION = re.compile(r"^### (\w+)$", re.MULTILINE)
def main() -> None:
# Get the most recent tag.
match = RE_BODY.match(Path("CHANGELOG.md").read_text(encoding="utf-8"))
assert match
body = match.groups()[0].strip()
# Add Markdown formatting to sections.
body = RE_SECTION.sub(r"### \1", body)
print(body)
if __name__ == "__main__":
main()
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