1 #!/usr/bin/env python 2 # Copyright (C) 2017 The Android Open Source Project 3 # 4 # Licensed under the Apache License, Version 2.0 (the "License"); 5 # you may not use this file except in compliance with the License. 6 # You may obtain a copy of the License at 7 # 8 # http://www.apache.org/licenses/LICENSE-2.0 9 # 10 # Unless required by applicable law or agreed to in writing, software 11 # distributed under the License is distributed on an "AS IS" BASIS, 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 # See the License for the specific language governing permissions and 14 # limitations under the License. 15 16 """ Wrapper to invoke compiled build tools from the build system. 17 18 This is just a workaround for GN assuming that all external scripts are 19 python sources. It is used to invoke tools like the protoc compiler. 20 """ 21 22 import argparse 23 import os 24 import subprocess 25 import sys 26 27 def main(): 28 parser = argparse.ArgumentParser() 29 parser.add_argument('--chdir', default=None) 30 parser.add_argument('--stamp', default=None) 31 parser.add_argument('--path', default=None) 32 parser.add_argument('--noop', default=False, action='store_true') 33 parser.add_argument('--suppress_stdout', default=False, action='store_true') 34 parser.add_argument('--suppress_stderr', default=False, action='store_true') 35 parser.add_argument('cmd', nargs=argparse.REMAINDER) 36 args = parser.parse_args() 37 38 if args.noop: 39 return 0 40 41 if args.chdir and not os.path.exists(args.chdir): 42 print >> sys.stderr, 'Cannot chdir to %s from %s' % (workdir, os.getcwd()) 43 return 1 44 45 exe = os.path.abspath(args.cmd[0]) if os.sep in args.cmd[0] else args.cmd[0] 46 env = os.environ.copy() 47 if args.path: 48 env['PATH'] = os.path.abspath(args.path) + os.pathsep + env['PATH'] 49 50 devnull = open(os.devnull, 'wb') 51 stdout = devnull if args.suppress_stdout else None 52 stderr = devnull if args.suppress_stderr else None 53 54 try: 55 proc = subprocess.Popen( 56 [exe] + args.cmd[1:], 57 cwd=args.chdir, 58 env=env, 59 stderr=stderr, 60 stdout=stdout) 61 ret = proc.wait() 62 if ret == 0 and args.stamp: 63 with open(args.stamp, 'w'): 64 os.utime(args.stamp, None) 65 return ret 66 except OSError as e: 67 print 'Error running: "%s" (%s)' % (args.cmd[0], e.strerror) 68 print 'PATH=%s' % env.get('PATH') 69 return 127 70 71 if __name__ == '__main__': 72 sys.exit(main()) 73
