releases-to-changelog

releases-to-changelog.py

#!/usr/bin/env python3

# Small script to build a changelog file out of past GitHub releases.
#
# USAGE: ./releases-to-changelog.py <github-repo-path>
# Example: ./releases-to-changelog.py "JetBrains/kotlin" > CHANGELOG.md

from subprocess import check_output
import sys
import json

repo_url = f"https://api.github.com/repos/{sys.argv[1]}/releases"
output = check_output(f"curl -s {repo_url} " +
                      "| jq '.[] | { body, name, published_at }' " +
                      "| jq -s '.'", shell=True).decode('utf-8')
releases = json.loads(output)
changelog = """# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

"""
for release in releases:
    date = release['published_at'].split('T')[0]
    changelog += f"## [{release['name']}] - {date}\n\n{release['body']}\n\n"
print(changelog)