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#!/usr/bin/env python
# Copyright 2015 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
This script calls the first argument for each of the following arguments in
parallel. E.g.
parallel.py "clang --opt" file1 file2
calls
clang --opt file1
clang --opt file2
The output (stdout and stderr) is concatenated sequentially in the form:
______________ file1
<output of clang --opt file1>
______________ finish <exit code of clang --opt file1> ______________
______________ file2
<output of clang --opt file2>
______________ finish <exit code of clang --opt file2> ______________
"""
# for py2/py3 compatibility
from __future__ import print_function
import itertools
import multiprocessing
import subprocess
import sys
def invoke(cmdline):
try:
return (subprocess.check_output(
cmdline, shell=True, stderr=subprocess.STDOUT), 0)
except subprocess.CalledProcessError as e:
return (e.output, e.returncode)
if __name__ == '__main__':
assert len(sys.argv) > 2
processes = multiprocessing.cpu_count()
pool = multiprocessing.Pool(processes=processes)
cmdlines = ["%s %s" % (sys.argv[1], filename) for filename in sys.argv[2:]]
for filename, result in itertools.izip(
sys.argv[2:], pool.imap(invoke, cmdlines)):
print("______________ %s" % filename)
print(result[0])
print("______________ finish %d ______________" % result[1])