40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
# Copyright 2018 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import subprocess
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import logging
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class Process:
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def __init__(self, cmd):
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self._cmd = cmd
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self.process = subprocess.Popen(cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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close_fds=True,
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shell=False)
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def read_lines(self):
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# stdout will end with empty bytes when process exits.
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for line in iter(self.process.stdout.readline, b''):
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logging.info('subprocess: {}'.format(line))
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yield line
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def wait_and_check(self):
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for _ in self.read_lines():
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pass
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self.process.stdout.close()
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return_code = self.process.wait()
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logging.info('Subprocess exit with code {}.'.format(
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return_code))
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if return_code:
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raise subprocess.CalledProcessError(return_code, self._cmd) |