1#!/usr/bin/env python3 2# SPDX-License-Identifier: GPL-2.0+ 3 4""" 5Determines how many parallel tasks "make" is expecting, as it is 6not exposed via any special variables, reserves them all, runs a subprocess 7with PARALLELISM environment variable set and any %PARALLELISM% in its 8arguments replaced by the count, and releases the jobs back again. 9 10See: 11 https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver 12""" 13 14import os 15import sys 16 17LIB_DIR = "../tools/lib/python" 18SRC_DIR = os.path.dirname(os.path.realpath(__file__)) 19 20sys.path.insert(0, os.path.join(SRC_DIR, LIB_DIR)) 21 22from jobserver import JobserverExec # pylint: disable=C0415 23 24 25def main(): 26 """Main program""" 27 if len(sys.argv) < 2: 28 name = os.path.basename(__file__) 29 sys.exit("usage: " + name +" command [args ...]\n" + __doc__) 30 31 with JobserverExec() as jobserver: 32 return jobserver.run(sys.argv[1:]) 33 34 35if __name__ == "__main__": 36 sys.exit(main()) 37