#!/usr/bin/env python3
"""
Extract changelog section for a specific version from CHANGELOG.md
Usage:
python scripts/extract_changelog.py 0.1.0
"""
import sys
import re
from pathlib import Path
def extract_changelog_for_version(version: str) -> str:
"""
Extract the changelog content for a specific version.
Args:
version: Version number (e.g., "0.1.0")
Returns:
The changelog content for that version, or empty string if not found.
"""
changelog_path = Path(__file__).parent.parent / "CHANGELOG.md"
if not changelog_path.exists():
print(f"Error: CHANGELOG.md not found at {changelog_path}", file=sys.stderr)
sys.exit(1)
content = changelog_path.read_text()
# Pattern to match version section: from [version] to next ## or end of file
# We want everything AFTER the version header line
pattern = rf"## \[{re.escape(version)}\][^\n]*\n(.*?)(?=\n## \[|\Z)"
match = re.search(pattern, content, re.DOTALL)
if not match:
print(f"Error: Version {version} not found in CHANGELOG.md", file=sys.stderr)
sys.exit(1)
changelog = match.group(1).strip()
return changelog
def main():
if len(sys.argv) != 2:
print("Usage: python extract_changelog.py <version>", file=sys.stderr)
print("Example: python extract_changelog.py 0.1.0", file=sys.stderr)
sys.exit(1)
version = sys.argv[1]
# Remove 'v' prefix if present
if version.startswith('v'):
version = version[1:]
changelog = extract_changelog_for_version(version)
# Print to stdout (can be redirected to file)
print(changelog)
if __name__ == "__main__":
main()
