mbedtls/tests/scripts/check-python-files.sh
Gilles Peskine e188734f51 Don't use parallel jobs for pylint
When pylint runs in parallel, it loses the ability to detect duplicated code
across modules. Duplicated code is usually a bad thing, so give pylint the
opportunity to let us know.

This makes pylint slightly slower, but going from 2 threads to 1 does not
make it anywhere close to twice as slow. On my machine, with Python 3.5,
pylint -j2 takes about 12s while single-threaded pylint takes about 16s
of wall clock time.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-09-18 21:27:37 +02:00

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#! /usr/bin/env sh
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# Licensed 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.
# Purpose: check Python files for potential programming errors or maintenance
# hurdles. Run pylint to detect some potential mistakes and enforce PEP8
# coding standards. Run mypy to perform static type checking.
# We'll keep going on errors and report the status at the end.
ret=0
if type python3 >/dev/null 2>/dev/null; then
PYTHON=python3
else
PYTHON=python
fi
check_version () {
$PYTHON - "$2" <<EOF
import packaging.version
import sys
import $1 as package
actual = package.__version__
wanted = sys.argv[1]
if packaging.version.parse(actual) < packaging.version.parse(wanted):
sys.stderr.write("$1: version %s is too old (want %s)\n" % (actual, wanted))
exit(1)
EOF
}
can_pylint () {
# Pylint 1.5.2 from Ubuntu 16.04 is too old:
# E: 34, 0: Unable to import 'mbedtls_dev' (import-error)
# Pylint 1.8.3 from Ubuntu 18.04 passed on the first commit containing this line.
check_version pylint 1.8.3
}
can_mypy () {
# mypy 0.770 is too old:
# tests/scripts/test_psa_constant_names.py:34: error: Cannot find implementation or library stub for module named 'mbedtls_dev'
# mypy 0.780 from pip passed on the first commit containing this line.
check_version mypy.version 0.780
}
# With just a --can-xxx option, check whether the tool for xxx is available
# with an acceptable version, and exit without running any checks. The exit
# status is true if the tool is available and acceptable and false otherwise.
if [ "$1" = "--can-pylint" ]; then
can_pylint
exit
elif [ "$1" = "--can-mypy" ]; then
can_mypy
exit
fi
echo 'Running pylint ...'
$PYTHON -m pylint scripts/mbedtls_dev/*.py scripts/*.py tests/scripts/*.py || {
echo >&2 "pylint reported errors"
ret=1
}
echo
echo 'Running mypy ...'
$PYTHON -m mypy scripts/*.py tests/scripts/*.py ||
ret=1
exit $ret