github-compare

#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright 2016 SUSE Linux GmbH
# Author: Thomas Bechtold <[email protected]>


from __future__ import print_function

import argparse
import requests
import json
import sys


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('org', metavar='organization', type=str, nargs=1,
                    help='github organization')
    parser.add_argument('repo', metavar='repository', type=str, nargs=1,
                        help='github repository')
    parser.add_argument('rev1', metavar='rev1', type=str, nargs=1,
                        help='revision 1. Can be a sha or a tag')
    parser.add_argument('rev2', metavar='rev2', type=str, nargs=1,
                        help='revision 2. Can be a sha or a tag')
    return vars(parser.parse_args())


def _commit_list_get_messages(commit_list, ignore_merge_commits=True):
    messages = list()
    for commit in reversed(commit_list):
        # skip merge commits
        if ignore_merge_commits and len(commit['parents']) > 1:
            continue
        # get the commit message
        msg = _commit_get_message(commit)
        messages.append(msg)
    # remove duplicates
    messages = list(set(messages))
    return messages


def _commit_get_message(commit, only_first_line=True):
    msg = commit['commit']['message']
    if only_first_line:
        return msg.splitlines()[0]
    return msg

if __name__ == "__main__":
    args = parse_args()
    org = args['org'][0]
    repo = args['repo'][0]
    rev1 = args['rev1'][0]
    rev2 = args['rev2'][0]
    # get the compare url
    url = 'https://api.github.com/repos/%s/%s/compare/%s...%s' % (org, repo, rev1, rev2)
    r = requests.get(url)

    if r.ok:
        data = json.loads(r.text or r.content)
        messages = _commit_list_get_messages(data['commits'])
        print('- update to version %s' % (rev2))
        for msg in messages:
            # the RPM changelog format
            print('  * %s' % (msg))
        #pprint.pprint(data)
    else:
        print('Code %s for url: %s' % (r.status_code, url))
        sys.exit(1)