Add .github/release_log.py to simplify changelog creation.

Author: 1st1

.github/release_log.py

@@ -0,0 +1,49 @@
+# Copyright (C) 2016-present the ayncpg authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of asyncpg and is released under
+# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+
+
+import json
+import requests
+import re
+import sys
+
+
+BASE_URL = 'https://api.github.com/repos/magicstack/asyncpg/compare'
+
+
+def main():
+    if len(sys.argv) < 2:
+        print('pass a sha1 hash as a first argument')
+        sys.exit(1)
+
+    from_hash = sys.argv[1]
+
+    r = requests.get(f'{BASE_URL}/{from_hash}...master')
+    data = json.loads(r.text)
+
+    for commit in data['commits']:
+        message = commit['commit']['message']
+        first_line = message.partition('\n\n')[0]
+        gh_username = commit['author']['login']
+        sha = commit["sha"][:8]
+
+        m = re.search(r'\#(?P<num>\d+)\b', message)
+        if m:
+            issue_num = m.group('num')
+        else:
+            issue_num = None
+
+        print(f'* {first_line}')
+        print(f'  (by @{gh_username} in {sha}', end='')
+        if issue_num:
+            print(f' for #{issue_num})')
+        else:
+            print(')')
+        print()
+
+
+if __name__ == '__main__':
+    main()