Downloads Google cloud functions logs between two times

download_logs.py

#!/usr/bin/env python
import argparse
import subprocess
import re

parser = argparse.ArgumentParser()
parser.add_argument('function')
parser.add_argument('--start-time')
parser.add_argument('--end-time')
parser.add_argument('--filter')

args = parser.parse_args()

log_line_regex = r".\s+(?P<function>.*?)\s+(?P<hash>.*?)\s+(?P<ts>.*?\ .*?)\s+(?P<msg>.*)"

total_calls = 0

start_time = args.start_time

while True:
	gcloud_args = ["gcloud", "functions", "logs", "read",  args.function,  "--limit",  "1000", "--start-time", start_time, "--end-time", args.end_time]

	if args.filter:
		gcloud_args.extend(['--filter', args.filter])

	for i, line in enumerate(subprocess.check_output(gcloud_args).split('\n')):
		if not line:
			continue

		if i == 0:
			if total_calls == 0:
				print(line)
			
			continue

		m = re.match(log_line_regex, line)
		d = m.groupdict()

		print(line)

		start_time = d['ts']

	if i == 2:
		break

	total_calls += 1