V8.04.002.2025.08.11

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

lib/lib_source_guard.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+#######################################
+# Prevent the file to be sourced twice.
+# Arguments:
+#   1: File to source.
+#######################################
+source_guard() {
+  declare var_file="${1}"
+  declare var_name="${var_file##*/}"
+  declare var_guard="_${var_name//[^a-zA-Z0-9_]/_}_LOADED"
+
+  if ! declare -p "${var_guard}" &>/dev/null; then
+    # shellcheck disable=SC1090
+    . "${var_file}"
+  fi
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh