#!/usr/bin/env vpython3
# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import argparse
import os
import stat
import sys
sys.path.append(
os.path.join(os.path.dirname(__file__), os.pardir, os.pardir, os.pardir,
'build'))
# //build imports.
import action_helpers
def _parse_args(args):
description = 'Generator of bash scripts that can invoke the Python ' \
'library for running Rust unit tests with support for ' \
'Chromium test filters, sharding, and test output.'
parser = argparse.ArgumentParser(description=description)
parser.add_argument('--script-path',
dest='script_path',
help='Where to write the bash script.',
metavar='FILEPATH',
required=True)
parser.add_argument('--exe-dir',
dest='exe_dir',
help='Directory where the wrapped executables are',
metavar='PATH',
required=True)
parser.add_argument('--rust-test-executables',
dest='rust_test_executables',
help='File listing one or more executables to wrap. ' \
'(basenames - no .exe extension or directory)',
metavar='FILEPATH',
required=True)
parser.add_argument('--make-bat',
action='store_true',
help='Generate a .bat file instead of a bash script')
return parser.parse_args(args=args)
def _find_test_executables(args):
exes = set()
input_filepath = args.rust_test_executables
with open(input_filepath) as f:
for line in f:
exe_name = line.strip()
# Append ".exe" extension when *targeting* Windows, not when this
# script is running on windows. We do that by using `args.make_bat`
# as a signal.
if exe_name in exes:
raise ValueError(
f'Duplicate entry "{exe_name}" in {input_filepath}')
if args.make_bat:
suffix = '.exe'
else:
suffix = ''
exes.add(f'{exe_name}{suffix}')
if not exes:
raise ValueError(f'Unexpectedly empty file: {input_filepath}')
exes = sorted(exes) # For stable results in unit tests.
return exes
def _validate_if_test_executables_exist(exes):
for exe in exes:
if not os.path.isfile(exe):
raise ValueError(f'File not found: {exe}')
def _generate_script(args, should_validate_if_exes_exist=True):
THIS_DIR = os.path.abspath(os.path.dirname(__file__))
GEN_SCRIPT_DIR = os.path.dirname(args.script_path)
# Path from the .bat or bash script to the test exes.
exe_dir = os.path.relpath(args.exe_dir, start=GEN_SCRIPT_DIR)
exe_dir = os.path.normpath(exe_dir)
# Path from the .bat or bash script to the python main.
main_dir = os.path.relpath(THIS_DIR, start=GEN_SCRIPT_DIR)
main_dir = os.path.normpath(main_dir)
exes = _find_test_executables(args)
if should_validate_if_exes_exist:
_validate_if_test_executables_exist(exes)
if args.make_bat:
res = '@echo off\n'
res += f'vpython3 "%~dp0\\{main_dir}\\rust_main_program.py" ^\n'
for exe in exes:
res += f' "--rust-test-executable=%~dp0\\{exe_dir}\\{exe}" ^\n'
res += ' %*'
else:
res = '#!/bin/bash\n'
res += (f'env vpython3 '
f'"$(dirname $0)/{main_dir}/rust_main_program.py" \\\n')
for exe in exes:
res += (
f' '
f'"--rust-test-executable=$(dirname $0)/{exe_dir}/{exe}" \\\n')
res += ' "$@"'
return res
def _main():
args = _parse_args(sys.argv[1:])
# atomic_output will ensure we only write to the file on disk if what we
# give to write() is different than what's currently on disk.
with action_helpers.atomic_output(args.script_path) as f:
f.write(_generate_script(args).encode())
# chmod a+x
st = os.stat(args.script_path)
if (not st.st_mode & stat.S_IXUSR) or (not st.st_mode & stat.S_IXGRP) or \
(not st.st_mode & stat.S_IXOTH):
os.chmod(args.script_path,
st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
if __name__ == '__main__':
_main()
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