Count unique GitHub users committed to a specified repositories within 90 days, to check the required number of licenses for GitHub Advanced Security or Snyk.

count_active.py

#!/usr/bin/env python3
import json
import os
import sys
from datetime import datetime, timedelta

import requests

TOKEN = os.environ.get('GITHUB_TOKEN')

repositories = {"github.com/aaa/bbb", "github.com/aaa/ccc"}

unique_emails = set()
three_months_ago = (datetime.now() - timedelta(days=90)).isoformat()
headers = {'Authorization': f'token {TOKEN}'}
print('Counting active users...', file=sys.stderr)
for repoURL in repositories:
    org, repo = repoURL.split('/')[1:]
    print(f'{repo}: ', file=sys.stderr, end='')
    url = f'https://api.github.com/repos/{org}/{repo}/commits?since={three_months_ago}'
    response = requests.get(url, headers=headers)
    commits = response.json()
    repo_emails = set()
    for commit in commits:
        email = commit['commit']['author']['email']
        if '[bot]' in email:
            continue
        repo_emails.add(email)

    repo_emails.discard('')
    print(len(repo_emails), file=sys.stderr)
    unique_emails = unique_emails.union(repo_emails)

unique_emails.discard('')

print(json.dumps(list(sorted(unique_emails)), indent=2))
print(f'Unique users in the last 90 days: {len(unique_emails)}', file=sys.stderr)