ref: 2bbc75bddc6f2a07056ff017108e35f14061041b
dir: /third_party/boringssl/src/util/bot/go/env.py/
#!/usr/bin/env python3
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Modified from go/env.py in Chromium infrastructure's repository to patch out
# everything but the core toolchain.
#
# https://chromium.googlesource.com/infra/infra/
"""Used to wrap a command:
$ ./env.py go version
"""
assert __name__ == '__main__'
import os
import subprocess
import sys
# /path/to/util/bot
ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Platform depended suffix for executable files.
EXE_SFX = '.exe' if sys.platform == 'win32' else ''
def get_go_environ(goroot):
"""Returns a copy of os.environ with added GOROOT and PATH variables."""
env = os.environ.copy()
env['GOROOT'] = goroot
gobin = os.path.join(goroot, 'bin')
path = env['PATH'].split(os.pathsep)
if gobin not in path:
env['PATH'] = os.pathsep.join([gobin] + path)
return env
def find_executable(name, goroot):
"""Returns full path to an executable in GOROOT."""
basename = name
if EXE_SFX and basename.endswith(EXE_SFX):
basename = basename[:-len(EXE_SFX)]
full_path = os.path.join(goroot, 'bin', basename + EXE_SFX)
if os.path.exists(full_path):
return full_path
return name
# TODO(davidben): Now that we use CIPD to fetch Go, this script does not do
# much. Switch to setting up GOROOT and PATH in the recipe?
goroot = os.path.join(ROOT, 'golang')
new = get_go_environ(goroot)
exe = sys.argv[1]
if exe == 'python':
exe = sys.executable
else:
# Help Windows to find the executable in new PATH, do it only when
# executable is referenced by name (and not by path).
if os.sep not in exe:
exe = find_executable(exe, goroot)
sys.exit(subprocess.call([exe] + sys.argv[2:], env=new))