45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
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# Copyright 2021 The Chromium Authors
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Utilities for invoking executables.
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"""
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import os
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import subprocess
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import re
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# Regex for matching 7-bit and 8-bit C1 ANSI sequences.
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# Credit: https://stackoverflow.com/a/14693789/4692014
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_ANSI_ESCAPE_8BIT_REGEX = re.compile(
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br"""
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(?: # either 7-bit C1, two bytes, ESC Fe (omitting CSI)
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\x1B
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[@-Z\\-_]
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| # or a single 8-bit byte Fe (omitting CSI)
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[\x80-\x9A\x9C-\x9F]
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| # or CSI + control codes
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(?: # 7-bit CSI, ESC [
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\x1B\[
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| # 8-bit CSI, 9B
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\x9B
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)
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[0-?]* # Parameter bytes
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[ -/]* # Intermediate bytes
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[@-~] # Final byte
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)
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""", re.VERBOSE)
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def run_and_tee_output(args):
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"""Runs the test executable passing-thru its output to stdout (in a
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terminal-colors-friendly way). Waits for the executable to exit.
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Returns:
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The full executable output as an UTF-8 string.
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"""
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output_bytes = subprocess.check_output(args)
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# Strip ANSI / terminal escapes.
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output_bytes = _ANSI_ESCAPE_8BIT_REGEX.sub(b'', output_bytes)
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return output_bytes.decode('utf-8')
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