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import argparse
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("command", nargs=argparse.REMAINDER)
return parser.parse_args()
def list_tests(binary):
with tempfile.NamedTemporaryFile() as tmpfile:
cmd = [binary, "--list-verbose", "--list-path", tmpfile.name]
subprocess.check_call(cmd)
with open(tmpfile.name) 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)
chunk_size = len(test_names) // args.split_factor
not_used = len(test_names) % args.split_factor
shift = chunk_size + (args.shard < not_used)
start = chunk_size * args.shard + min(args.shard, not_used)
end = start + shift
return [] if end > len(test_names) else test_names[start:end]
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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