1 #!/usr/bin/env python 2 # Copyright 2014 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 # Modified from go/env.py in Chromium infrastructure's repository to patch out 7 # everything but the core toolchain. 8 # 9 # https://chromium.googlesource.com/infra/infra/ 10 11 """Can be used to point environment variable to hermetic Go toolset. 12 13 Usage (on linux and mac): 14 $ eval `./env.py` 15 $ go version 16 17 Or it can be used to wrap a command: 18 19 $ ./env.py go version 20 """ 21 22 assert __name__ == '__main__' 23 24 import imp 25 import os 26 import subprocess 27 import sys 28 29 # Do not want to mess with sys.path, load the module directly. 30 bootstrap = imp.load_source( 31 'bootstrap', os.path.join(os.path.dirname(__file__), 'bootstrap.py')) 32 33 old = os.environ.copy() 34 new = bootstrap.prepare_go_environ() 35 36 if len(sys.argv) == 1: 37 for key, value in sorted(new.iteritems()): 38 if old.get(key) != value: 39 print 'export %s="%s"' % (key, value) 40 else: 41 exe = sys.argv[1] 42 if exe == 'python': 43 exe = sys.executable 44 else: 45 # Help Windows to find the executable in new PATH, do it only when 46 # executable is referenced by name (and not by path). 47 if os.sep not in exe: 48 exe = bootstrap.find_executable(exe, [bootstrap.WORKSPACE]) 49 sys.exit(subprocess.call([exe] + sys.argv[2:], env=new)) 50
