last_updated.py

from concurrent.futures import ThreadPoolExecutor
import os
import subprocess
import sys


from typing import Dict, List, Optional


DEST_DIR = os.path.abspath(
    "linter_repos"
    if not len(sys.argv) > 1 or sys.argv[1].endswith(".json")
    else sys.argv[1]
)
STARTUPINFO: Optional[subprocess.STARTUPINFO]
if os.name == 'nt':
    STARTUPINFO = subprocess.STARTUPINFO()
    STARTUPINFO.dwFlags |= (
        subprocess.STARTF_USESTDHANDLES | subprocess.STARTF_USESHOWWINDOW
    )
    STARTUPINFO.wShowWindow = subprocess.SW_HIDE
else:
    STARTUPINFO = None


def execute(args: List[str], cwd: Optional[str]) -> str:
    return subprocess.check_output(
        args, cwd=cwd, startupinfo=STARTUPINFO, universal_newlines=True, encoding='utf-8'
    )


def date_for_head(root: str, name: str) -> Dict[str, str]:
    path = os.path.join(root, name)
    date = execute(['git', 'log', '-n1', '--format=%aI'], cwd=path).strip()
    return {'name': name, 'date': date}


with ThreadPoolExecutor() as executor:
    futures = [
        executor.submit(date_for_head, DEST_DIR, name)
        for name in set(os.listdir(DEST_DIR))
    ]

results = [f.result() for f in futures]
results = sorted(results, key=lambda r: r['date'])

for r in results:
    print('{}  {}'.format(r['date'], r['name']))