107 lines
3.9 KiB
Python
107 lines
3.9 KiB
Python
#!/usr/bin/env python3
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import argparse
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import json
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import sys
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from datetime import UTC, datetime
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try:
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import git # type: ignore
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except ImportError:
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print("Please install GitPython: pip install GitPython", file=sys.stderr) # noqa: T201
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sys.exit(1)
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def get_sorted_tags(repo):
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"""Returns all tags sorted by their commit date (newest first)."""
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return sorted(repo.tags, key=lambda t: t.commit.committed_datetime, reverse=True)
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def get_commits_between(repo, start, end):
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"""Return commits between two refs (no merges)."""
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return list(repo.iter_commits(f"{start}..{end}", no_merges=True))
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def generate_changelog(repo_path, changelog_path):
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repo = git.Repo(repo_path)
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tags = get_sorted_tags(repo)
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changelog = []
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if not tags:
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start = repo.commit(repo.git.rev_list("--max-parents=0", "HEAD"))
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commits = get_commits_between(repo, start.hexsha, "HEAD")
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changelog.append(
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{
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"tag": "Initial Release",
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"date": datetime.now(UTC).isoformat(),
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"commits": [
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{
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"sha": c.hexsha[:8],
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"full_sha": c.hexsha,
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"message": c.message.strip(),
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"author": c.author.name,
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"date": c.committed_datetime.astimezone(UTC).isoformat(),
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}
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for c in commits
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],
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}
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)
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else:
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for i in range(len(tags) - 1):
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newer, older = tags[i], tags[i + 1]
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commits = get_commits_between(repo, older.commit.hexsha, newer.commit.hexsha)
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if not commits:
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continue
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changelog.append(
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{
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"tag": newer.name,
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"full_sha": newer.commit.hexsha,
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"date": newer.commit.committed_datetime.astimezone(UTC).isoformat(),
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"commits": [
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{
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"sha": c.hexsha[:8],
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"full_sha": c.hexsha,
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"message": c.message.strip(),
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"author": c.author.name,
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"date": c.committed_datetime.astimezone(UTC).isoformat(),
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}
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for c in commits
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],
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}
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)
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# Add HEAD -> latest tag if ahead
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head = repo.head.commit
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if head.hexsha != tags[0].commit.hexsha:
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commits = get_commits_between(repo, tags[0].commit.hexsha, head.hexsha)
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if commits:
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changelog.insert(
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0,
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{
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"tag": f"Unreleased ({head.hexsha[:8]})",
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"full_sha": head.hexsha,
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"date": head.committed_datetime.astimezone(UTC).isoformat(),
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"commits": [
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{
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"sha": c.hexsha[:8],
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"full_sha": c.hexsha,
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"message": c.message.strip(),
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"author": c.author.name,
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"date": c.committed_datetime.astimezone(UTC).isoformat(),
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}
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for c in commits
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],
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},
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)
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with open(changelog_path, "w", encoding="utf-8") as f:
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json.dump(changelog, f, indent=2)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Generate CHANGELOG.json from Git tags.")
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parser.add_argument("--repo_path", "-p", default=".", help="Path to git repo")
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parser.add_argument("--changelog_path", "-f", default="CHANGELOG.json", help="Output file path")
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args = parser.parse_args()
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generate_changelog(args.repo_path, args.changelog_path)
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