[ci] added scripts to auto-generate release post text (#1142)

* [ci] added scripts to auto-generate release post text

* polish code

.github/workflows/scripts/generate_release_draft.py

+#!/usr/bin/env python
+# coding: utf-8
+
+import argparse
+import requests
+import re
+import os
+
+COMMIT_API = 'https://api.github.com/repos/hpcaitech/ColossalAI/commits'
+TAGS_API = 'https://api.github.com/repos/hpcaitech/ColossalAI/tags'
+
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--out', type=str, help='output path for the release draft', required=True)
+    return parser.parse_args()
+
+
+def get_latest_tag_commit(headers=None):
+    res = requests.get(url=TAGS_API, headers=headers)
+    data = res.json()
+    commit_hash = data[0]['commit']['sha']
+    version = data[0]['name']
+    return commit_hash, version
+
+
+def get_commit_info(commit_hash, headers=None):
+    api = f'{COMMIT_API}/{commit_hash}'
+    res = requests.get(url=api, headers=headers)
+    return res.json()
+
+
+def get_all_commit_info(since, headers=None):
+    page = 1
+    results = []
+
+    while True:
+        api = f'{COMMIT_API}?since={since}&per_page=100&page={page}'
+        resp = requests.get(url=api, headers=headers)
+        data = resp.json()
+
+        # exit when no more data
+        if len(data) == 0:
+            break
+
+        results.extend(data)
+        page += 1
+
+    return results
+
+
+def collate_release_info(commit_info_list):
+    results = dict()
+    pattern = pattern = r'\[.*\]'
+
+    for commit_info in commit_info_list:
+        author = commit_info['commit']['author']['name']
+        author_url = commit_info['author']['url']
+        msg = commit_info['commit']['message']
+        match = re.search(pattern, msg)
+
+        if match:
+            tag = match.group().lstrip('[').rstrip(']').capitalize()
+            if tag not in results:
+                results[tag] = []
+            results[tag].append((msg, author, author_url))
+
+    return results
+
+
+def generate_release_post_markdown(current_version, last_version, release_info):
+    text = []
+
+    # add highlights
+    highlights = "## What's Changed \n\n"
+    text.append(highlights)
+
+    # add items
+    for k, v in release_info.items():
+        topic = f"### {k} \n"
+        text.append(topic)
+
+        for msg, author, author_url in v:
+            # only keep the first line
+            msg = msg.split('\n')[0]
+
+            item = f'{msg} by [{author}]({author_url})\n'
+            text.append(f'- {item}')
+
+        text.append('\n')
+
+    # add full change log
+    text.append(
+        f'**Full Changelog**: https://github.com/hpcaitech/ColossalAI/compare/{current_version}...{last_version}')
+
+    return text
+
+
+if __name__ == '__main__':
+    token = os.environ['GITHUB_API_TOKEN']
+    headers = {'Authorization': token}
+
+    # get previous release tag
+    last_release_commit, last_version = get_latest_tag_commit(headers)
+    last_release_commit_info = get_commit_info(last_release_commit, headers=headers)
+    last_release_date = last_release_commit_info['commit']['author']['date']
+
+    # get the commits since last release
+    commit_info = get_all_commit_info(since=last_release_date, headers=headers)
+    commit_info = commit_info[:-1]    # remove the release commit
+
+    # collate into markdown
+    release_info = collate_release_info(commit_info)
+    markdown_text = generate_release_post_markdown('v0.1.7', last_version, release_info)
+
+    # write into a file
+    args = parse_args()
+    with open(args.out, 'w') as f:
+        for line in markdown_text:
+            f.write(line)