Create validate_tabs.sh

scripts/validate_tabs.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+#
+# Copyright (C) 2025 Moko Consulting <hello@mokoconsulting.tech>
+#
+# This file is part of a Moko Consulting project.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program 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.
+#
+# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# FILE INFORMATION
+# DEFGROUP: MokoStandards
+# INGROUP: Scripts.Validation
+# REPO: https://github.com/mokoconsulting-tech/MokoStandards
+# PATH: /scripts/validate_tabs.sh
+# VERSION: 01.00.00
+# BRIEF: Detect tab characters in repository files for CI enforcement.
+#
+
+set -euo pipefail
+
+ROOT_DIR="$(git rev-parse --show-toplevel)"
+EXIT_CODE=0
+
+echo "Scanning repository for tab characters"
+
+# Exclude common binary and vendor paths
+EXCLUDES=(
+   ".git"
+   "node_modules"
+   "vendor"
+   "dist"
+   "build"
+)
+
+EXCLUDE_ARGS=()
+for path in "${EXCLUDES[@]}"; do
+   EXCLUDE_ARGS+=("--exclude-dir=${path}")
+done
+
+# Search for literal tab characters
+MATCHES=$(grep -RIn $'\t' "${ROOT_DIR}" "${EXCLUDE_ARGS[@]}" || true)
+
+if [ -n "${MATCHES}" ]; then
+   echo "Tab characters detected in the following files:"
+   echo "${MATCHES}"
+   echo ""
+   echo "CI policy violation: tabs are not permitted"
+   EXIT_CODE=1
+else
+   echo "No tab characters found"
+fi
+
+exit "${EXIT_CODE}"