From ee22bfc458fbc77890be4db71cf6174f986571e5 Mon Sep 17 00:00:00 2001
From: Marnik Bercx <mbercx@gmail.com>
Date: Thu, 21 Nov 2024 11:49:56 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=94=A7=20Add=20`update=5Fchangelog.py`=20?=
 =?UTF-8?q?script?=
MIME-Version: 1.0
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---
 .github/workflows/update_changelog.py | 94 +++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 .github/workflows/update_changelog.py

diff --git a/.github/workflows/update_changelog.py b/.github/workflows/update_changelog.py
new file mode 100644
index 0000000..1ffa753
--- /dev/null
+++ b/.github/workflows/update_changelog.py
@@ -0,0 +1,94 @@
+#!/bin/bash
+# -*- coding: utf-8 -*-
+"""Script for automatically updating the `CHANGELOG.md` based on the commits since the latest release tag."""
+
+from pathlib import Path
+import re
+import subprocess
+from datetime import date
+
+from qe_tools import __version__
+
+DEFAULT_CHANGELOG_SECTIONS = """
+### ‼️ Breaking changes
+
+
+### ✨ New features
+
+
+### 🗑️ Deprecations
+
+
+### 👌 Improvements
+
+
+### 🐛 Bug fixes
+
+
+### 📚 Documentation
+
+
+### 🔧 Maintenance
+
+
+### ⬆️ Update dependencies
+
+
+### 🧪 Tests
+
+
+### ♻️ Refactor
+
+"""
+
+
+def update_changelog():
+    """Update the `CHANGELOG.md` for a first draft of the release."""
+
+    print('🔍 Checking the current version number')
+    current_changelog = Path('CHANGELOG.md').read_text(encoding='utf-8')
+
+    print(__version__)
+
+    if str(__version__) in current_changelog:
+        print('🛑 Current version already in `CHANGELOG.md`. Skipping...')
+        return
+
+    print('⬆️ Found updated version number, adapting `CHANGELOG.md`.')
+    tags = subprocess.run(['git', 'tag', '--sort=v:refname'], capture_output=True, check=True, encoding='utf-8').stdout
+    latest_tag = re.findall(r'(v\d\.\d\.\d)\n', tags)[-1]
+
+    print(f'🔄 Comparing with latest tag `{latest_tag}`.')
+    commits = subprocess.run(
+        ['git', 'log', "--pretty=format:'%h|%H|%s'", f'{latest_tag}..origin/main'],
+        capture_output=True,
+        check=True,
+        encoding='utf-8',
+    ).stdout
+
+    pr_pattern = re.compile(r'\(\S(?P<pr_number>\d+)\)')
+
+    changelog_message = f'## `v{__version__}` - {date.today()}\n' + DEFAULT_CHANGELOG_SECTIONS
+
+    for commit in commits.splitlines():
+        # Remove the PR number from the commit message
+        pr_match = pr_pattern.search(commit)
+
+        if pr_match is not None:
+            pr_number = pr_match.groupdict()['pr_number']
+            commit = commit.replace(rf'(#{pr_number})', '')
+
+        # Add the commit hash (short) to link to the changelog
+        commit = commit.strip("'")
+        hash_short, hash_long, message = commit.split('|', maxsplit=2)
+        message += f' [[{hash_short}](https://github.com/aiidateam/qe-tools/commit/{hash_long})]'
+        changelog_message += f'\n* {message}'
+
+    with Path('CHANGELOG.md').open('w', encoding='utf8') as handle:
+        handle.write(changelog_message + '\n\n' + current_changelog)
+
+    print("🚀 Success! Finalise the `CHANGELOG.md` and let's get this baby released.")
+
+
+if __name__ == '__main__':
+    update_changelog()