core: add script check_scripts.sh

This script is now used in CI to check all shell scripts (*.sh) and Python
scripts (*.py) that are in git repository.

Tools used:

- shell scripts: shellcheck
- Python scripts: flake8 + pylint + bandit

tools/check_scripts.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+#
+# Copyright (C) 2023 Sébastien Helleu <flashcode@flashtux.org>
+#
+# This file is part of WeeChat, the extensible chat client.
+#
+# WeeChat is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# WeeChat is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with WeeChat.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+#
+# Check shell and Python scripts in WeeChat git repository using these tools:
+#  - shell scripts: shellcheck
+#  - Python scripts: flake8 + pylint + bandit
+#
+
+# exit on any error
+set -e
+
+# check git repository
+ROOT_DIR=$(git rev-parse --show-toplevel)
+cd "${ROOT_DIR}"
+
+SHELL_SCRIPTS=$(git ls-files "*.sh")
+PYTHON_SCRIPTS=$(git ls-files "*.py")
+
+# display commands
+set -x
+
+# check shell scripts
+for script in $SHELL_SCRIPTS; do
+    shellcheck "${ROOT_DIR}/$script"
+done
+
+# check Python scripts
+for script in $PYTHON_SCRIPTS; do
+    flake8 --max-line-length=100 --builtins=_ "${ROOT_DIR}/$script"
+    pylint --additional-builtins=_ "${ROOT_DIR}/$script"
+    bandit "${ROOT_DIR}/$script"
+done