Check whether our mirror packages are up to date.
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#!/usr/bin/env python3
"""
This mirror status checker determines whether CSC mirror is up-to-date with upstream
"""
import time
import sys
import requests
from multiprocessing import Pool, Manager
from typing import Optional
from time import sleep, localtime, strftime
from projects import *
import json
NUM_THREAD = 16
MAX_RETRY = 3
RETRY_TIMEOUT = 30 # In seconds
def safe_print(*args, **kwargs):
# When run with 'chronic' and 'timeout', stdout gets suppressed
# due to buffering. Make sure to always flush the output.
print(*args, **kwargs, flush=True)
# Return None if no error occurs and a string for error message otherwise
def check_project(args) -> Optional[str]:
current_time = int(time.time())
project, data = args
try:
project_class = getattr(sys.modules[__name__], project)
# Skip projects we no longer mirror
if data[project].get('exclude', False):
return None
checker_result = project_class.check(data, project, current_time)
if checker_result:
data[project]["out_of_sync_since"] = None
return None
elif (data[project]["out_of_sync_since"] is not None
and current_time - data[project]["out_of_sync_since"] > data[project]["out_of_sync_interval"]):
now_str = strftime("%d %b %Y %H:%M:%S (local time)", localtime())
duration = current_time - data[project]["out_of_sync_since"]
return f"{project} out-of-sync at {now_str} for {duration}s"
else:
data[project]["out_of_sync_since"] = current_time
return None
except requests.exceptions.RequestException as err:
return f"{project}\n{err}"
def check_project_with_retry(args) -> bool:
project, _ = args
errs = []
for _ in range(MAX_RETRY):
res = check_project(args)
if res == None:
safe_print(f"Success: {project} up-to-date")
return True
else:
errs.append(res)
# Do nothing, try again later
sleep(RETRY_TIMEOUT)
# Max try reached, print errors
safe_print(f"Error: {project}")
for reason in errs:
safe_print(f" {reason}")
return False
def main():
data_file = 'data.json'
if len(sys.argv) > 1:
data_file = sys.argv[1]
manager = Manager()
data = json.load(open(data_file))
sync_data = manager.dict({k: manager.dict(v) for k, v in data.items()})
with Pool(NUM_THREAD) as pool:
all_pass = all(pool.imap(check_project_with_retry, ((k, sync_data) for k in data.keys())))
with open(data_file, "w", encoding="utf-8") as file:
json.dump({k: dict(v) for k, v in sync_data.items()}, file, indent=' ')
sys.exit(0 if all_pass else 1)
if __name__ == "__main__":
main()