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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
#
# A platform-agnostic tool for running a program in a modified environment.
#
import sys
import os
import subprocess
from optparse import OptionParser
def main(argv=None):
parser = OptionParser(usage="Usage: %prog [options] [--] VAR=VALUE... command [options] arg1 arg2...")
parser.add_option("-i", "--ignore-environment",
action="store_true", default=False,
help="Start with an empty environment (do not inherit current environment)")
(options, args) = parser.parse_args(args=argv)
if options.ignore_environment:
new_env = {}
else:
new_env = os.environ.copy()
# pull out each name value pair
while len(args):
z = args[0].split("=", 1)
if len(z) != 2:
break # done with env args
name, value = z[0], z[1]
if len(name) == 0:
raise Exception("Error: incorrect format for env var: '%s'" % str(args[0]))
del args[0]
if len(value) == 0:
# value is not present, so delete it
if name in new_env:
del new_env[name]
else:
new_env[name] = value
if len(args) == 0 or len(args[0]) == 0:
raise Exception("Error: syntax error in command arguments")
p = subprocess.Popen(args, env=new_env)
return p.wait()
if __name__ == "__main__":
sys.exit(main())
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