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import argparse
import os
import tempfile
import shlex
import subprocess
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument("--split-factor", type=int, default=0)
parser.add_argument("--shard", type=int, default=0)
parser.add_argument("--fork-mode", type=str, default="SEQUENTIAL")
parser.add_argument("command", nargs=argparse.REMAINDER)
return parser.parse_args()
def get_sequential_chunk(tests, modulo, modulo_index):
chunk_size = len(tests) // modulo
not_used = len(tests) % modulo
shift = chunk_size + (modulo_index < not_used)
start = chunk_size * modulo_index + min(modulo_index, not_used)
end = start + shift
return [] if end > len(tests) else tests[start:end]
def get_shuffled_chunk(tests, modulo, modulo_index):
result_tests = []
for i, test in enumerate(tests):
if i % modulo == modulo_index:
result_tests.append(test)
return result_tests
def list_tests(binary):
# can't use NamedTemporaryFile or mkstemp because of child process access issues on Windows
# https://stackoverflow.com/questions/66744497/python-tempfile-namedtemporaryfile-cant-use-generated-tempfile
with tempfile.TemporaryDirectory() as tmp_dir:
list_file = os.path.join(tmp_dir, 'list')
cmd = [binary, "--list-verbose", "--list-path", list_file]
subprocess.check_call(cmd)
with open(list_file) as afile:
lines = afile.read().strip().split("\n")
lines = [x.strip() for x in lines]
return [x for x in lines if x]
def get_shard_tests(args):
test_names = list_tests(args.command[0])
test_names = sorted(test_names)
if args.fork_mode == "MODULO":
return get_shuffled_chunk(test_names, args.split_factor, args.shard)
elif args.fork_mode == "SEQUENTIAL":
return get_sequential_chunk(test_names, args.split_factor, args.shard)
else:
raise ValueError("detected unknown partition mode: {}".format(args.fork_mode))
def get_shard_cmd_args(args):
return ["+{}".format(x) for x in get_shard_tests(args)]
def main():
args = parse_args()
if args.split_factor:
shard_cmd = get_shard_cmd_args(args)
if shard_cmd:
cmd = args.command + shard_cmd
else:
print("No tests for {} shard".format(args.shard))
return 0
else:
cmd = args.command
rc = subprocess.call(cmd)
if rc:
print("Some tests failed. To reproduce run: {}".format(shlex.join(cmd)))
return rc
if __name__ == "__main__":
exit(main())
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