[#1574] add tools/shellcheck-all.sh

tools/shellcheck-all.sh

@@ -0,0 +1,59 @@
+#!/bin/sh
+
+# Copyright (C) 2020 Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Usage:
+#
+# ./tools/shellcheck-all.sh [-d|--debug] [-h|--help]
+#
+# Run to shellcheck all shell scripts inside this repository.
+
+# Exit with error if commands exit with non-zero and if undefined variables are
+# used.
+set -eu
+
+# Print usage.
+print_usage() {
+  printf \
+'Usage: %s {{options}}
+Options:
+  [-d|--debug]                 enable debug mode, showing every executed command
+  [-h|--help]                  print usage (this text)
+' \
+    "$(basename "${0}")"
+}
+
+# Define some ANSI color codes.
+if test -t 1; then
+  red='\033[91m'
+  reset='\033[0m'
+else
+  red=
+  reset=
+fi
+
+# Parse parameters.
+while test ${#} -gt 0; do
+  case "${1}" in
+    # [-d|--debug]             enable debug mode, showing every executed command
+    '-d'|'--debug') set -vx ;;
+
+    # [-h|--help]              print usage (this text).
+    '-h'|'--help') print_usage ;;
+
+    # Unrecognized argument
+    *)
+    printf "${red}ERROR: Unrecognized argument '%s'${reset}\\n" "${1}" 1>&2; print_usage; exit 1 ;;
+  esac; shift
+done
+
+# Change directory to Kea' top level build directory.
+root_path=$(cd "$(dirname "${0}")/.." && pwd)
+cd "${root_path}"
+
+# shellcheck disable=SC2046
+shellcheck $(grep -F 'SCRIPTS+=' ./.gitlab-ci.yml | cut -d '"' -f 2 | xargs | sort -uV)